US20080017345A1 - Molding-system valve - Google Patents
Molding-system valve Download PDFInfo
- Publication number
- US20080017345A1 US20080017345A1 US11/489,981 US48998106A US2008017345A1 US 20080017345 A1 US20080017345 A1 US 20080017345A1 US 48998106 A US48998106 A US 48998106A US 2008017345 A1 US2008017345 A1 US 2008017345A1
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- United States
- Prior art keywords
- metal
- valve body
- molding
- valve
- melt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/203—Injection pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
Definitions
- the present invention generally relates to molding systems, and more specifically the present invention relates to: (i) a metal-molding-system valve, (ii) a metal-molding system having a metal-molding-system valve, and (iii) a method of a metal-molding-system valve.
- Examples of known molding systems are (amongst others): (i) the HylectricTM Molding System, (ii) the QuadlocTM Molding System, (iii) the HylectricTM Molding System, and (iv) the HyMeTM Molding System, all manufactured by Husky Injection Molding Systems Limited (Location: Bolton, Ontario, Canada; www.husky.ca).
- U.S. Pat. No. 4,908,169 discloses a plasticisation method using a reciprocating screw having a double-flighted screw to keep a solid bed under compression and to transfer melt films from the screw and a barrel-heated surface.
- U.S. Pat. No. 5,040,589 discloses injection molding of metal alloys, such as magnesium alloys, with improved yield, productivity, and mold life.
- U.S. Pat. No. 5,680,894 discloses an injection-molding apparatus for a metal alloy having dendritic properties.
- the apparatus includes a sub-ring on a non-return valve assembly, which eliminates piston-ring leakage.
- U.S. Pat. No. 5,750,158 discloses an apparatus for preheating and blending material being fed to an extruder.
- the apparatus uses co-rotating screws and a close-temperature control to allow the preheating of materials containing a high-mineral filler content without localised heating or compacting.
- U.S. Pat. No. 5,843,489 discloses a screw for an extruder.
- the screw contains a jacket-shaped, spiral channel around a back side of a screw flight linked to inward and outward channels for a dual tube through a centre hole of a screw core.
- U.S. Patent Application Number 2005/0233020A1 discloses a non-return valve for use in a molding system.
- the valve has two complementary spigot portions provided on melt-flow surfaces that are engageable in closely-spaced, overlapping, and parallel arrangement when valve is in a closed configuration.
- a metal-molding-system valve including a valve body positionable in a melt-carrying passageway of a metal-molding system, the valve body permitting solidified adherance of a metallic-molding material of melt-carrying passageway to the valve body.
- a metal-molding system having a metal-molding-system valve, including a valve body positionable in a melt-carrying passageway of the metal-molding system, the valve body permitting solidified adherance of a metallic-molding material of melt-carrying passageway to the valve body.
- a method of a metal-molding-system valve including positioning a valve body in a melt-carrying passageway of a metal-molding system, and also including permitting solidified adherance of a metallic-molding material of melt-carrying passageway to the valve body.
- a technical effect, amongst other technical effects, of the aspects of the present invention is the molding-system valve is less prone to wear.
- FIGS. 1A and 1B are cross-sectional views of a metal-molding-system valve according to a first exemplary embodiment
- FIG. 2 is a cross-sectional view of a metal-molding-system valve according to a second exemplary embodiment
- FIG. 3 is a cross-sectional view of a metal-molding-system valve according to a third exemplary embodiment
- FIG. 4 is a cross-sectional view of a metal-molding-system valve according to a fourth exemplary embodiment
- FIGS. 5A to 5C are views of metal-molding-system valves according to a fifth exemplary embodiment.
- FIGS. 6A to 6C are views of a metal-molding-system valves according to a sixth exemplary embodiment.
- FIG. 1A is a cross-sectional view of a metal-molding-system valve 100 (hereafter referred to as “the valve 100 ”) according to the first exemplary embodiment.
- the valve 100 is used in a metal-molding system 102 (hereafter referred to as the “system 102 ”) or in a thixo-molding system.
- a thixo-molding system is used to process a slurry (part liquid, part solid) of a magnesium alloy.
- the valve 100 includes a valve body 104 that is positionable in a melt-carrying passageway 108 of the system 102 .
- the valve body 104 permits solidified adherance of a metallic-molding material 110 of (disposed in) melt-carrying passageway 110 to the valve body 104 .
- solidified adherance of the metallic-molding material 108 to the valve body 104 permits repeatable operation of the valve body 104 .
- the metallic-molding material 110 is hereafter referred to as the “melt 110 ”.
- a metallic plug 106 is formable between the valve body 104 and the melt-carrying passageway 108 .
- the metallic plug 106 is solidifyable to (formable to, detachably adherable to) and meltable from (deformable from) the valve body 104 .
- the metallic plug 106 (a thixo plug in the case of a thixo-molding system) is formable to the valve body 104 .
- the metallic plug 106 (hereafter referred to as “the plug 106 ”) is formable from a melt 110 (a metallic molding material).
- the melt 110 includes an alloy composition of magnesium (such as AZ91D). According to a variant, other alloys or types of metals are used (zinc, aluminum, etc).
- the valve body 104 defines a cavity 112 in cooperation with a molding-system component 114 (for example: a barrel) of the system 102 .
- a molding-system component 114 for example: a barrel
- the molding component 114 is hereafter referred to as “the barrel 114 ”; however, according to other variants, the molding component 114 is a component other than “the barrel”.
- the cavity 112 is configured to have the plug 106 formed therein at least in part.
- the valve body 104 includes or defines an outer surface 126 .
- the valve body 104 is attached (preferably threadably attached) to a processing screw 120 having an outer surface 121 and the processing screw 120 is useable in the barrel 114 .
- the barrel 114 defines an outer barrel wall 129 and also defines a barrel inner wall 128 which faces the outer surface 126 of the valve body 104 and faces the processing screw 120 .
- the outer surface 126 of the valve body 104 is configured to be cooled by a cooling mechanism 116 .
- the cooling mechanism 116 is configured to form a plug 106 between the outer surface 126 of the valve body 104 and the barrel inner wall 128 . Details of the cooling mechanism 116 will be described below in more detail.
- the processing screw 120 transports the melt 110 through a melt-carrying passageway 108 which is defined between the barrel inner wall 128 and the outer surface 121 of the processing screw 120 .
- the melt-carrying passageway 108 extends from a hopper (not depicted, but located to the right side of FIG. 1A ) to a machine nozzle 144 that extends from the barrel 114 .
- the melt 110 is transported past the valve body 104 and toward the machine nozzle 144 upon rotational actuation of the processing screw 120 .
- the melt 110 is accumulated within an accumulation zone 140 defined between the valve body 104 and the machine nozzle 144 .
- a plug (not depicted in FIG. 1A ) in an open condition, it is understood that a plug (not depicted in FIG. 1A ) will be formed within the nozzle 144 by using the cooling mechanism 138 ; it is understood that once a plug is formed in the nozzle 144 , accumulation of the molding material in the accumulation zone 140 may then begin.
- the melt 110 is deposited into the accumulation zone 140 where the melt 110 is collected (during a recovery phase) and then injected (during an injection phase) into a mold cavity defined by a mold (not depicted) which is operatively connected to the machine nozzle 144 .
- the processing screw 120 is actuatably rotated via an actuation mechanism (not depicted). Rotation of the processing screw 120 is sufficient to transport the melt 110 into the accumulation zone 140 (this is the recovery phase) and this action builds up an accumulation (or a shot) of melt in the accumulation zone 140 .
- the screw 120 translates away from the machine nozzle 144 during recovery.
- the actuation assembly then slidably translates the processing screw 120 which injects the shot of melt from the accumulation zone 140 and into the mold cavity (this is the injection phase).
- the valve body 104 Upon slidable translation of the processing screw 120 , the valve body 104 becomes slidable and translatable as well since the valve body 104 is connected to the processing screw 120 .
- the plug 106 is created or formed, within the cavity 112 , upon actuation of the cooling mechanism 116 after the shot of melt has been accumulated within the accumulation zone 140 .
- the cooling mechanism 116 cooperates with the processing screw 120 and cooperates with the valve body 104 .
- the cooling mechanism 116 defines a cooling circuit 118 A that extends within the processing screw 120 (at least in part).
- the cooling circuit 118 A is, preferably, enwrapped by an insulation layer 119 (at least in part) which avoid the cooling circuit 118 A from absorbing heat from the processing screw 120 .
- the valve body 104 defines a cooling circuit 118 B that is in fluid communication with the cooling circuit 118 A.
- the molding material freezes in the cavity 112 to form the plug 106 and it would be acceptable that some of the molding material was to freeze elsewhere along the surface of the nozzle body 104 which is being generally cooled.
- the amount of cooling directed to forming the plug 106 should be enough to form the plug and no more to cause adverse cooling of the molding material.
- the amount of cooling would have to be determined by some experiementation.
- a layer of frozen molding material may form to and adhere to the front surface of the body 104 , but it may be best (preferably) to minimize this condition from occuring.
- the processing screw 120 cooperates with a manifold 122 A and a manifold 122 B.
- the manifolds 122 A, 122 B include rotary-fluid couplings.
- the manifolds 122 A, 122 B are adapted to permit the screw 120 to be rotatable (by way of using gaskets, bearings, etc as known to those skilled in the art).
- the manifold 122 A receives, within a coolant holding area, a cooling fluid 125 (under pressure), transfers the cooling fluid 125 into the cooling circuit 118 A.
- the cooling fluid 125 then flows from the cooling circuit 118 A, into the cooling circuit 118 B of the valve body 104 , back into another branch of the cooling circuit 118 A and then into the manifold 122 B which permits the cooling fluid 125 to exit from the processing screw 120 .
- the cooling fluid 125 removes heat from the valve body 104 .
- the plug 106 is formed adjacent to the valve body 104 and within the cavity 112 .
- the cooling fluid 125 is deposited into the cooling circuits 118 A and 118 B for a calculated duration and possesses a sufficient cooling effect to form the plug 106 .
- the valve body 104 includes a melt-receiving feature 124 that faces the cavity 112 .
- the plug 106 is formed and eventually, if the cooling process of the cooling mechanism 116 acts with sufficient duration and strength, adheres to the melt-receiving feature 124 .
- the plug 106 forms and adheres to both the melt-receiving feature 124 and detachably adheres to the barrel inner wall 128 so as to provide an efficient barrier that prevents backflow of melt from the accumulation zone 140 backwardly toward the hopper and the manifolds 122 A and 122 B upon translation of the processing screw 120 toward the accumulation zone 140 .
- the plug 106 detachably adheres to the body 104 in that the plug 104 may form and temporarily adhere to the body 104 so as to significantly reduce or prevent leakage of molding material (once the plug 106 is formed and adhered to the body 104 ); however, the formed and adhered plug 106 is sheared off the from the inner surface of the barrel 114 once the screw 120 is made to translate (but the plug 106 may continue to adhere to the valve body 104 after the plug 106 has been sheared off the barrel 114 ).
- the melt-receiving feature 124 acts to facilitate or enhance bonding with the plug 106 so that as the valve body 104 is translated forwardly toward the machine nozzle 144 the plug 106 does not become detached from the valve body 104 .
- the valve body 104 does not include the melt-receiving feature 124 since the plug 106 may be adhered to the valve body 104 with sufficient a bonding strength.
- the plug 106 is adherable and unadherable (depending on the ability of the cooling mechanism 116 ) to and from any one of the valve body 104 , the barrel 114 and any combination and permutation thereof.
- the plug 106 although adhered to the barrel 114 and/or to the valve body 104 is shearable from either the valve body 104 and/or the barrel 114 upon actuation of the processing screw 120 which translates the valve body 104 toward the accumulation zone 140 .
- the plug 106 is adhered to the melt-receiving feature 124 so that the plug 106 becomes shearable (as close as possible) from the barrel inner wall 128 of the barrel 114 while remaining adhered to the melt-receiving feature 124 of the valve body 106 .
- a small gap (not depicted) is permitted between the formed plug 106 and the inner wall of the barrel, and the small gap is small enough so as to permit creation of a sufficient pressure drop from the front to the back of the valve body 104 .
- cooling may be shut off and this arrangement permits melting of the plug 106 (if so desired).
- the plug 106 is no longer required.
- the plug 106 is preferably melted by actuation of a heater 132 A placed accordingly along the barrel outer surface 129 .
- the remaining heaters 132 B and 132 C may be actuated to melt any solidified melt disposed in the melt-carrying passageway 108 , and a thixo plug (not depicted) is formed in the machine nozzle 144 .
- the plug formed in the nozzle 114 may be substituted for a mechanical valve (for example).
- FIG. 1B is a detailed cross-sectional view of the valve 100 of FIG. 1A .
- the valve 100 is shown immediately after the injection phase but before initiation of the recovery phase.
- the plug 106 may continue to exist (even though the plug 106 has been sheared off the barrel 114 ).
- the heater 142 may be actuated so as to add heat to the barrel 114 sufficiently enough to melt the plug 106 completely (the melted condition of the plug 106 is depicted in FIG. 1B ).
- the processing screw 120 is translated forwardly toward the machine nozzle 144 , and the melt 110 accumulated in the accumulation zone 140 is then forced through the machine nozzle 144 into the mold cavity of the mold (not depicted).
- the melt 110 is transported by the processing screw 120 along the melt-carrying passageway 108 to deposit into the accumulation zone 140 .
- This accumulation of the melt within the accumulation zone 140 causes the processing screw to translate backwardly toward the manifold 122 A (not shown).
- the plug 106 may be reheated enough to remelt the plug 106 if so desired.
- a thixo plug (not depicted) is formed within the machine nozzle 144 by using a nozzle cooling mechanism 138 .
- This thixo plug is blown out from the nozzle 144 during the injection phase to allow the melt 110 in the accumulation zone 140 to enter the mold cavity.
- another shot of the melt 110 must be accumulated. This is accomplished by melting the plug 106 (not shown) which is adhered to the valve body 104 by using the heater 132 A. If needed heaters 132 B and 132 C may be used to melt any potentially solidified melt that may have formed unintentionally (for whatever reason).
- the recovery phase may be repeated. This is then followed by repetition of the injection phase.
- the heater 142 is and induction heater that is attached to the barrel 114 to increase effectiveness for melting the plug 106 .
- the induction heater 142 is a fast-acting heating mechanism.
- a mechanical nozzle is used in place of forming and blowing out a plug from the nozzle 144 .
- FIG. 2 is a cross-sectional view of a metal-molding-system valve 200 (hereafter referred to as “the valve 200 ”) according to the second exemplary embodiment.
- the valve 200 a metal-molding-system valve 200 (hereafter referred to as “the valve 200 ”) according to the second exemplary embodiment.
- elements of the second exemplary embodiment that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a two-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment).
- the valve body of the second exemplary embodiment is labeled 204 rather than being labeled 104 , etc.
- the valve body 204 includes a valve passageway 209 , a valve seal 211 , a cooling circuit 218 B and a valve heater 213 .
- the valve passageway 209 is defined within the valve body 204 , and allows the plug 206 to be formable therein.
- the valve passageway 209 extends from the accumulation zone 240 to the melt-carrying passageway 208 .
- the passageway 208 is defined by the processing screw 220 and the barrel 214 .
- the valve passageway 208 receives the melt 210 , and then it passes the melt 210 to the accumulation zone 240 during a recovery phase.
- the valve body 204 which defines a valve body surface 205 , accommodates the valve seal 211 .
- the valve seal 211 is located on the valve body surface 205 , and the valve seal 211 is adjacent to the barrel 214 .
- the valve seal 211 interacts with the barrel inner wall 228 to substantially prevent a backflow of melt (the metallic molding material) from the accumulation zone 240 along the barrel inner wall 228 and toward the melt-carrying passageway 208 during an injection phase.
- the valve body 204 defines the cooling circuit 218 B.
- the cooling circuit 218 B is connected to the cooling mechanism 216 , which is actuated to form the plug 206 .
- the cooling circuit 218 B is placed accordingly in the valve body 204 as to not interfere with any mechanisms and/or assemblies defined therein.
- the valve heater 213 is positionable within the valve body 204 adjacent to the valve passageway 209 .
- the valve heater 213 is electrically connected to a valve-heater connection 215 .
- the valve-heater connection 215 extends from the valve heater 213 into the processing screw 220 and over to an electrical power source (not depicted).
- the valve heater 213 is placed along the valve passageway 209 to remove the plug 206 prior to commencement of the injection phase.
- the heater 213 is omitted and the plug is removed by throttling the cooling to the valve body 204 and allowing the valve body 204 to reheat by conduction from the molding material.
- FIG. 3 is a cross-sectional view of a metal-molding-system valve 300 (hereafter referred to as “the valve 300 ”) according to the third exemplary embodiment.
- the valve 300 a metal-molding-system valve 300 (hereafter referred to as “the valve 300 ”) according to the third exemplary embodiment.
- elements of the third exemplary embodiment that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a three-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment).
- the valve body of the third exemplary embodiment is labeled 304 rather than being labeled 104 , etc.
- the valve body 304 is configured to have a plug 306 formable within the cavity 312 .
- the cooling mechanism 316 includes heat pipes 350 . Using heat pipes in screws is known to those skilled in the art (reference is made to Japanese Patent JP 61-188125.
- the valve body 304 and the processing screw 320 are configured to accommodate a set of heat pipes 350 (or a single heat pipe).
- the heat pipes 350 include a heat conductive material such as aluminum or copper and the heat pipes 350 are filled with a heat-transfer medium (for example: a wick material and/or a coolant medium) that conducts heat from one end of the heat pipes 350 to the other end.
- the coolant medium or the wick material is chosen from a chemical element or composition that absorbs heat effectively (for example: mercury or sodium).
- a sufficient number of heat pipes 350 are used to remove heat from the cavity 312 in order to form (at least in part) the plug 306 therein (preferably after the recovery phase).
- the heat pipes 350 are oriented such that heat is absorbed from the cavity 312 at a receiving end of the heat pipes 350 and then the absorbed heat is transported to a relief end (or an opposite end) of the heat pipes 350 .
- the relief end of the heat pipes 350 is in fluid communication with a manifold 322 .
- the manifold 322 distributes the coolant fluid 325 (under pressure) over the relief end of the heat pipes 350 to remove heat therefrom.
- This heat removal from the valve body 304 forms (at least in part) the plug 306 .
- the heat pipes 350 may be encapsulated within an insulation layer 311 .
- the heat pipe 350 is permitted to deliver heat to the valve body 304 so as to melt the plug 306 .
- Heat pipes and the operation of heat pipes are known to those skilled in the art, and therefore no further description is provided for heat pipes.
- the heat pipes 350 depicted in FIG. 3 are used along with the valve body 204 of FIG. 2 , and this arrangement permits elimination of the heater 213 .
- FIG. 4 is a cross-sectional view of a metal-molding-system valve 400 (hereafter referred to as “the valve 400 ”) according to the fourth exemplary embodiment.
- the valve 400 a metal-molding-system valve 400 (hereafter referred to as “the valve 400 ”) according to the fourth exemplary embodiment.
- elements of the fourth exemplary embodiment that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a four-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment).
- the valve body of the fourth exemplary embodiment is labeled 404 rather than being labeled 104 , etc.
- a cooling mechanism 416 is used to form the thixo plug 406 .
- the cooling mechanism 416 cooperates with the barrel 414 .
- the cooling mechanism 416 is positioned adjacent to the valve body 404 along the barrel outer wall 429 .
- the cooling mechanism 416 removes heat from the barrel outer wall 429 adjacent to a region proximate to where the valve body 404 is located.
- the cooling mechanism 416 delivers a coolant fluid 425 (under pressure) toward the end of the recovery phase to form (at least in part) the plug 406 .
- FIGS. 5A to 5C are cross-sectional views of metal-molding-system valves 500 A, 500 B and 500 C (hereafter referred to as “the valves 500 A, 500 B, 500 C) according to the fifth exemplary embodiment.
- the valves 500 A, 500 B, 500 C are identified by reference numerals that use a five-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment).
- the mold body of the fifth exemplary embodiment is labeled 504 rather than being labeled 104 .
- the valves 500 A, 500 B and 500 C each include meli-receiving features 524 A, 524 B, and 524 C respectively, and each has a plurality of various types or shapes of grooves.
- the valve body 504 has a longitudinal axis 562 that extends from the center therethrough.
- FIG. 5A shows the valve 500 A that includes the melt-receiving feature 524 A that has a plurality of rectangular-shaped grooves 560 A, 560 B, and 560 C that are aligned (preferably) orthogonally to the longitudinal axis 562 .
- the rectangular-shaped grooves 560 A, 560 B, 560 C are arrayed successively at calculated, offset distances therebetween.
- the arrangement of the rectangular-shaped grooves 560 A, 560 B, and 560 C is not limited to this configuration (for example: they may be irregularly spaced and/or the rectangular-shaped grooves may be inclined non-orthogonally from the longitudinal axis 562 ).
- FIG. 5B shows the valve 500 B that includes the melt-receiving feature 524 B that has a plurality of v-shaped grooves 564 A, 564 B, 564 C.
- the v-shaped grooves 564 A, 564 B, and 564 C are arrayed successively at a calculated offset distance between one another.
- the arrangement of the v-shaped grooves 564 A, 564 B, and 564 C is not limited to this configuration (for example: they may be irregularly spaced apart and/or may be inclined non-orthogonally from the longitudinal axis 562 ).
- FIG. 5C shows the valve 500 C that includes the melt-receiving feature 524 C that has semispherical-shaped grooves 566 A, 566 B, 566 C.
- the semispherical-shaped grooves 566 A, 566 B, and 566 C are arrayed successively at a calculated offset distance apart from each other.
- the arrangement of the semispherical-shaped grooves 566 A, 566 B, and 566 C is not limited to this configuration (for example: they can be irregularly spaced apart from one another and/or may be inclined non-orthogonally from the longitudinal axis 562 .
- the melt-receiving features 524 A, 524 B, 524 C are not used in the valve body 504 .
- the melt-receiving features 524 A, 524 B, 524 C are not used in the valve body 504 , and the side walls of the body 504 are tapered towards a front end of the body 504 (towards the top side of FIG. 5 ).
- FIGS. 6A to 6C are cross-sectional views of a metal molding-system valve 600 (hereafter referred to as ”the valve 600 ) according to the sixth embodiment.
- the valve 600 elements of the sixth exemplary embodiment (that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a six-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment).
- the mold body of the sixth exemplary embodiment is labeled 604 rather than being labeled 104 .
- the valve 600 A, 600 B and 600 C each include melt-receiving features 624 A, 624 B, and 624 C respectively (each having a plurality of recesses).
- FIG. 6A shows the valve 600 that includes the melt-receiving feature 624 A that has a plurality of rectangular-shaped recesses 670 that are aligned (in rows) orthogonally to a surface of the valve body 604 .
- the rectangular-shaped recesses 670 are arrayed successively at calculated offset distances from one another.
- the arrangement of the rectangular-shaped recesses 670 is not limited to this configuration (for example: they may be irregularly spaced and/or inclined non-orthogonally from a longitudinal axis of the valve body 604 and/or placed in a random pattern onto the valve body 604 ).
- FIG. 6B shows the valve 600 B that includes the melt-receiving feature 624 B includes a plurality of conically-shaped recesses 672 .
- the conically-shaped recess 672 are arrayed successively at calculated offset distances from one another.
- the arrangement of the conically-shaped recesses 672 is not limited to this configuration (for example: they may be irregularly spaced apart, etc).
- FIG. 6C shows the valve 600 C that includes the melt-receiving feature 624 C that has semispherical-shaped recesses 674 .
- the semispherical-shaped recesses 674 are arrayed successively at a calculated offset distance from each other.
- the arrangement of the semispherical-shaped recesses 674 is not limited to this configuration (for example: they may be irregularly spaced apart, etc).
- the melt-receiving features 624 A, 624 B, 624 C are not used in the valve body 604 .
- the melt-receiving features 624 A, 624 B, 624 C are not used in the valve body 604 , and the side walls of the body 604 are tapered towards a front end of the body 604 (towards the top side of FIG. 6 ).
- the melt-receiving feature 624 includes a plurality of divots.
Abstract
Description
- The following is a list of patent applications related to the present application, in which the Applicant's references numbers are: H-903-0-US, HB-903-0-US and HC903-0-US.
- The present invention generally relates to molding systems, and more specifically the present invention relates to: (i) a metal-molding-system valve, (ii) a metal-molding system having a metal-molding-system valve, and (iii) a method of a metal-molding-system valve.
- Examples of known molding systems are (amongst others): (i) the Hylectric™ Molding System, (ii) the Quadloc™ Molding System, (iii) the Hylectric™ Molding System, and (iv) the HyMe™ Molding System, all manufactured by Husky Injection Molding Systems Limited (Location: Bolton, Ontario, Canada; www.husky.ca).
- U.S. Pat. No. 4,908,169 (Inventor: Galic et al; Published: Mar. 3, 1990) discloses a plasticisation method using a reciprocating screw having a double-flighted screw to keep a solid bed under compression and to transfer melt films from the screw and a barrel-heated surface.
- U.S. Pat. No. 5,040,589 (Inventor: Bradley et al; Published: Aug. 20, 1991) discloses injection molding of metal alloys, such as magnesium alloys, with improved yield, productivity, and mold life.
- U.S. Pat. No. 5,680,894 (Inventor: Kilbert; Published: Oct. 28, 1997) discloses an injection-molding apparatus for a metal alloy having dendritic properties. The apparatus includes a sub-ring on a non-return valve assembly, which eliminates piston-ring leakage.
- U.S. Pat. No. 5,750,158 (Inventor: Wissmann et al: Published: May 12, 1998) discloses an apparatus for preheating and blending material being fed to an extruder. The apparatus uses co-rotating screws and a close-temperature control to allow the preheating of materials containing a high-mineral filler content without localised heating or compacting.
- U.S. Pat. No. 5,843,489 (Inventor: Nakano; Published: Dec. 01, 1998) discloses a screw for an extruder. The screw contains a jacket-shaped, spiral channel around a back side of a screw flight linked to inward and outward channels for a dual tube through a centre hole of a screw core.
- U.S. Patent Application Number 2005/0233020A1 (Inventor: Manda et al; Published: Oct. 20, 2005) discloses a non-return valve for use in a molding system. The valve has two complementary spigot portions provided on melt-flow surfaces that are engageable in closely-spaced, overlapping, and parallel arrangement when valve is in a closed configuration.
- According to a first aspect of the present invention, there is provided a metal-molding-system valve, including a valve body positionable in a melt-carrying passageway of a metal-molding system, the valve body permitting solidified adherance of a metallic-molding material of melt-carrying passageway to the valve body.
- According to a second aspect of the present invention, there is provided a metal-molding system, having a metal-molding-system valve, including a valve body positionable in a melt-carrying passageway of the metal-molding system, the valve body permitting solidified adherance of a metallic-molding material of melt-carrying passageway to the valve body.
- According to a third aspect of the present invention, there is provided a method of a metal-molding-system valve, including positioning a valve body in a melt-carrying passageway of a metal-molding system, and also including permitting solidified adherance of a metallic-molding material of melt-carrying passageway to the valve body.
- A technical effect, amongst other technical effects, of the aspects of the present invention is the molding-system valve is less prone to wear.
- A better understanding of the exemplary embodiments of the present invention (including alternatives and/or variations thereof) may be obtained with reference to the detailed description of the exemplary embodiments along with the following drawings, in which:
-
FIGS. 1A and 1B are cross-sectional views of a metal-molding-system valve according to a first exemplary embodiment; -
FIG. 2 is a cross-sectional view of a metal-molding-system valve according to a second exemplary embodiment; -
FIG. 3 is a cross-sectional view of a metal-molding-system valve according to a third exemplary embodiment; -
FIG. 4 is a cross-sectional view of a metal-molding-system valve according to a fourth exemplary embodiment; -
FIGS. 5A to 5C are views of metal-molding-system valves according to a fifth exemplary embodiment; and -
FIGS. 6A to 6C are views of a metal-molding-system valves according to a sixth exemplary embodiment. - The drawings are not necessarily to scale and are sometimes illustrated by phantom lines, diagrammatic representations and fragmentary views. In certain instances, details that are not necessary for an understanding of the embodiments or that render other details difficult to perceive may have been omitted.
-
FIG. 1A is a cross-sectional view of a metal-molding-system valve 100 (hereafter referred to as “thevalve 100”) according to the first exemplary embodiment. Thevalve 100 is used in a metal-molding system 102 (hereafter referred to as the “system 102”) or in a thixo-molding system. A thixo-molding system is used to process a slurry (part liquid, part solid) of a magnesium alloy. - The
valve 100 includes avalve body 104 that is positionable in a melt-carryingpassageway 108 of thesystem 102. Thevalve body 104 permits solidified adherance of a metallic-molding material 110 of (disposed in) melt-carryingpassageway 110 to thevalve body 104. Preferably, solidified adherance of the metallic-molding material 108 to thevalve body 104 permits repeatable operation of thevalve body 104. The metallic-molding material 110 is hereafter referred to as the “melt 110”. - Preferably, responsive to a
cooling mechanism 116 actuated to cooling themelt 110, ametallic plug 106 is formable between thevalve body 104 and the melt-carryingpassageway 108. Themetallic plug 106 is solidifyable to (formable to, detachably adherable to) and meltable from (deformable from) thevalve body 104. The metallic plug 106 (a thixo plug in the case of a thixo-molding system) is formable to thevalve body 104. The metallic plug 106 (hereafter referred to as “theplug 106”) is formable from a melt 110 (a metallic molding material). Preferably, themelt 110 includes an alloy composition of magnesium (such as AZ91D). According to a variant, other alloys or types of metals are used (zinc, aluminum, etc). - The
valve body 104 defines acavity 112 in cooperation with a molding-system component 114 (for example: a barrel) of thesystem 102. For simplifying the description of the first exemplary embodiment, themolding component 114 is hereafter referred to as “thebarrel 114”; however, according to other variants, themolding component 114 is a component other than “the barrel”. Thecavity 112 is configured to have theplug 106 formed therein at least in part. Thevalve body 104 includes or defines anouter surface 126. Thevalve body 104 is attached (preferably threadably attached) to aprocessing screw 120 having anouter surface 121 and theprocessing screw 120 is useable in thebarrel 114. Thebarrel 114 defines anouter barrel wall 129 and also defines a barrelinner wall 128 which faces theouter surface 126 of thevalve body 104 and faces theprocessing screw 120. - The
outer surface 126 of thevalve body 104 is configured to be cooled by acooling mechanism 116. Thecooling mechanism 116 is configured to form aplug 106 between theouter surface 126 of thevalve body 104 and the barrelinner wall 128. Details of thecooling mechanism 116 will be described below in more detail. - During the operation of the
system 102, theprocessing screw 120 transports themelt 110 through a melt-carryingpassageway 108 which is defined between the barrelinner wall 128 and theouter surface 121 of theprocessing screw 120. The melt-carryingpassageway 108 extends from a hopper (not depicted, but located to the right side ofFIG. 1A ) to amachine nozzle 144 that extends from thebarrel 114. Themelt 110 is transported past thevalve body 104 and toward themachine nozzle 144 upon rotational actuation of theprocessing screw 120. Themelt 110 is accumulated within anaccumulation zone 140 defined between thevalve body 104 and themachine nozzle 144. Although thenozzle 144 is depicted (inFIG. 1A ) in an open condition, it is understood that a plug (not depicted inFIG. 1A ) will be formed within thenozzle 144 by using thecooling mechanism 138; it is understood that once a plug is formed in thenozzle 144, accumulation of the molding material in theaccumulation zone 140 may then begin. Themelt 110 is deposited into theaccumulation zone 140 where themelt 110 is collected (during a recovery phase) and then injected (during an injection phase) into a mold cavity defined by a mold (not depicted) which is operatively connected to themachine nozzle 144. - The
processing screw 120 is actuatably rotated via an actuation mechanism (not depicted). Rotation of theprocessing screw 120 is sufficient to transport themelt 110 into the accumulation zone 140 (this is the recovery phase) and this action builds up an accumulation (or a shot) of melt in theaccumulation zone 140. Thescrew 120 translates away from themachine nozzle 144 during recovery. The actuation assembly then slidably translates theprocessing screw 120 which injects the shot of melt from theaccumulation zone 140 and into the mold cavity (this is the injection phase). Upon slidable translation of theprocessing screw 120, thevalve body 104 becomes slidable and translatable as well since thevalve body 104 is connected to theprocessing screw 120. - The
plug 106 is created or formed, within thecavity 112, upon actuation of thecooling mechanism 116 after the shot of melt has been accumulated within theaccumulation zone 140. Thecooling mechanism 116 cooperates with theprocessing screw 120 and cooperates with thevalve body 104. Thecooling mechanism 116 defines acooling circuit 118A that extends within the processing screw 120 (at least in part). Thecooling circuit 118A is, preferably, enwrapped by an insulation layer 119 (at least in part) which avoid thecooling circuit 118A from absorbing heat from theprocessing screw 120. Thevalve body 104 defines acooling circuit 118B that is in fluid communication with thecooling circuit 118A. Preferably, the molding material freezes in thecavity 112 to form theplug 106 and it would be acceptable that some of the molding material was to freeze elsewhere along the surface of thenozzle body 104 which is being generally cooled. The amount of cooling directed to forming theplug 106 should be enough to form the plug and no more to cause adverse cooling of the molding material. The amount of cooling would have to be determined by some experiementation. A layer of frozen molding material may form to and adhere to the front surface of thebody 104, but it may be best (preferably) to minimize this condition from occuring. - Preferably, the
processing screw 120 cooperates with a manifold 122A and a manifold 122B. Preferably, themanifolds manifolds screw 120 to be rotatable (by way of using gaskets, bearings, etc as known to those skilled in the art). The manifold 122A receives, within a coolant holding area, a cooling fluid 125 (under pressure), transfers the coolingfluid 125 into thecooling circuit 118A. The cooling fluid 125 then flows from thecooling circuit 118A, into thecooling circuit 118B of thevalve body 104, back into another branch of thecooling circuit 118A and then into the manifold 122B which permits the cooling fluid 125 to exit from theprocessing screw 120. The coolingfluid 125 removes heat from thevalve body 104. In response to the removal of this heat from thevalve body 104, theplug 106 is formed adjacent to thevalve body 104 and within thecavity 112. The coolingfluid 125 is deposited into thecooling circuits plug 106. - The
valve body 104 includes a melt-receivingfeature 124 that faces thecavity 112. Theplug 106 is formed and eventually, if the cooling process of thecooling mechanism 116 acts with sufficient duration and strength, adheres to the melt-receivingfeature 124. Preferably theplug 106 forms and adheres to both the melt-receivingfeature 124 and detachably adheres to the barrelinner wall 128 so as to provide an efficient barrier that prevents backflow of melt from theaccumulation zone 140 backwardly toward the hopper and themanifolds processing screw 120 toward theaccumulation zone 140. Theplug 106 detachably adheres to thebody 104 in that theplug 104 may form and temporarily adhere to thebody 104 so as to significantly reduce or prevent leakage of molding material (once theplug 106 is formed and adhered to the body 104); however, the formed and adheredplug 106 is sheared off the from the inner surface of thebarrel 114 once thescrew 120 is made to translate (but theplug 106 may continue to adhere to thevalve body 104 after theplug 106 has been sheared off the barrel 114). - The melt-receiving
feature 124 acts to facilitate or enhance bonding with theplug 106 so that as thevalve body 104 is translated forwardly toward themachine nozzle 144 theplug 106 does not become detached from thevalve body 104. In an alternative embodiment, thevalve body 104 does not include the melt-receivingfeature 124 since theplug 106 may be adhered to thevalve body 104 with sufficient a bonding strength. Generally, theplug 106 is adherable and unadherable (depending on the ability of the cooling mechanism 116) to and from any one of thevalve body 104, thebarrel 114 and any combination and permutation thereof. Theplug 106, although adhered to thebarrel 114 and/or to thevalve body 104 is shearable from either thevalve body 104 and/or thebarrel 114 upon actuation of theprocessing screw 120 which translates thevalve body 104 toward theaccumulation zone 140. Preferably, theplug 106 is adhered to the melt-receivingfeature 124 so that theplug 106 becomes shearable (as close as possible) from the barrelinner wall 128 of thebarrel 114 while remaining adhered to the melt-receivingfeature 124 of thevalve body 106. According to a variant, a small gap (not depicted) is permitted between the formedplug 106 and the inner wall of the barrel, and the small gap is small enough so as to permit creation of a sufficient pressure drop from the front to the back of thevalve body 104. After thescrew 120 is stroked forwardly, cooling may be shut off and this arrangement permits melting of the plug 106 (if so desired). - Once the injection phase has been completed, the
plug 106 is no longer required. Theplug 106 is preferably melted by actuation of aheater 132A placed accordingly along the barrelouter surface 129. Before the recovery phase begins, the remainingheaters passageway 108, and a thixo plug (not depicted) is formed in themachine nozzle 144. According to a variant, the plug formed in thenozzle 114 may be substituted for a mechanical valve (for example). -
FIG. 1B is a detailed cross-sectional view of thevalve 100 ofFIG. 1A . Thevalve 100 is shown immediately after the injection phase but before initiation of the recovery phase. For clarity, immediately after injection, theplug 106 may continue to exist (even though theplug 106 has been sheared off the barrel 114). However, theheater 142 may be actuated so as to add heat to thebarrel 114 sufficiently enough to melt theplug 106 completely (the melted condition of theplug 106 is depicted inFIG. 1B ). During the injection phase, theprocessing screw 120 is translated forwardly toward themachine nozzle 144, and themelt 110 accumulated in theaccumulation zone 140 is then forced through themachine nozzle 144 into the mold cavity of the mold (not depicted). During the recovery phase, themelt 110 is transported by theprocessing screw 120 along the melt-carryingpassageway 108 to deposit into theaccumulation zone 140. This accumulation of the melt within theaccumulation zone 140 causes the processing screw to translate backwardly toward themanifold 122A (not shown). At this time, theplug 106 may be reheated enough to remelt theplug 106 if so desired. - Prior to the injection phase, a thixo plug (not depicted) is formed within the
machine nozzle 144 by using anozzle cooling mechanism 138. This thixo plug is blown out from thenozzle 144 during the injection phase to allow themelt 110 in theaccumulation zone 140 to enter the mold cavity. Upon injecting the melt accumulated in theaccumulation zone 140, another shot of themelt 110 must be accumulated. This is accomplished by melting the plug 106 (not shown) which is adhered to thevalve body 104 by using theheater 132A. If neededheaters plug 106 and reform another thixo plug (not depicted) in themachine nozzle 144, the recovery phase may be repeated. This is then followed by repetition of the injection phase. In a variant (not depicted), theheater 142 is and induction heater that is attached to thebarrel 114 to increase effectiveness for melting theplug 106. Theinduction heater 142 is a fast-acting heating mechanism. According to a variant, a mechanical nozzle is used in place of forming and blowing out a plug from thenozzle 144. -
FIG. 2 is a cross-sectional view of a metal-molding-system valve 200 (hereafter referred to as “thevalve 200”) according to the second exemplary embodiment. To facilitate an understanding of the second exemplary embodiment, elements of the second exemplary embodiment (that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a two-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment). For example, the valve body of the second exemplary embodiment is labeled 204 rather than being labeled 104, etc. - Preferably, the
valve body 204 includes avalve passageway 209, avalve seal 211, acooling circuit 218B and avalve heater 213. Thevalve passageway 209 is defined within thevalve body 204, and allows theplug 206 to be formable therein. Thevalve passageway 209 extends from theaccumulation zone 240 to the melt-carryingpassageway 208. Thepassageway 208 is defined by theprocessing screw 220 and thebarrel 214. Thevalve passageway 208 receives themelt 210, and then it passes themelt 210 to theaccumulation zone 240 during a recovery phase. - The
valve body 204, which defines avalve body surface 205, accommodates thevalve seal 211. Thevalve seal 211 is located on thevalve body surface 205, and thevalve seal 211 is adjacent to thebarrel 214. Thevalve seal 211 interacts with the barrelinner wall 228 to substantially prevent a backflow of melt (the metallic molding material) from theaccumulation zone 240 along the barrelinner wall 228 and toward the melt-carryingpassageway 208 during an injection phase. Thevalve body 204 defines thecooling circuit 218B. Thecooling circuit 218B is connected to thecooling mechanism 216, which is actuated to form theplug 206. Thecooling circuit 218B is placed accordingly in thevalve body 204 as to not interfere with any mechanisms and/or assemblies defined therein. Thevalve heater 213 is positionable within thevalve body 204 adjacent to thevalve passageway 209. Thevalve heater 213 is electrically connected to a valve-heater connection 215. The valve-heater connection 215 extends from thevalve heater 213 into theprocessing screw 220 and over to an electrical power source (not depicted). Thevalve heater 213 is placed along thevalve passageway 209 to remove theplug 206 prior to commencement of the injection phase. In a variant (not depicted), theheater 213 is omitted and the plug is removed by throttling the cooling to thevalve body 204 and allowing thevalve body 204 to reheat by conduction from the molding material. -
FIG. 3 is a cross-sectional view of a metal-molding-system valve 300 (hereafter referred to as “thevalve 300”) according to the third exemplary embodiment. To facilitate an understanding of the third exemplary embodiment, elements of the third exemplary embodiment (that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a three-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment). For example, the valve body of the third exemplary embodiment is labeled 304 rather than being labeled 104, etc. - The
valve body 304 is configured to have aplug 306 formable within thecavity 312. Thecooling mechanism 316 includesheat pipes 350. Using heat pipes in screws is known to those skilled in the art (reference is made to Japanese Patent JP 61-188125. Preferably, thevalve body 304 and theprocessing screw 320 are configured to accommodate a set of heat pipes 350 (or a single heat pipe). Theheat pipes 350 include a heat conductive material such as aluminum or copper and theheat pipes 350 are filled with a heat-transfer medium (for example: a wick material and/or a coolant medium) that conducts heat from one end of theheat pipes 350 to the other end. Preferably, the coolant medium or the wick material is chosen from a chemical element or composition that absorbs heat effectively (for example: mercury or sodium). Preferably, a sufficient number ofheat pipes 350 are used to remove heat from thecavity 312 in order to form (at least in part) theplug 306 therein (preferably after the recovery phase). Preferably, theheat pipes 350 are oriented such that heat is absorbed from thecavity 312 at a receiving end of theheat pipes 350 and then the absorbed heat is transported to a relief end (or an opposite end) of theheat pipes 350. The relief end of theheat pipes 350 is in fluid communication with amanifold 322. Toward the end of the recovery phase, the manifold 322 distributes the coolant fluid 325 (under pressure) over the relief end of theheat pipes 350 to remove heat therefrom. This heat removal from thevalve body 304 forms (at least in part) theplug 306. In order to prevent theheat pipes 350 from absorbing heat from theprocessing screw 320, theheat pipes 350 may be encapsulated within aninsulation layer 311. As an option, at the end of injection but before recovery, theheat pipe 350 is permitted to deliver heat to thevalve body 304 so as to melt theplug 306. Heat pipes and the operation of heat pipes are known to those skilled in the art, and therefore no further description is provided for heat pipes. According to a variant (not depicted), theheat pipes 350 depicted inFIG. 3 are used along with thevalve body 204 ofFIG. 2 , and this arrangement permits elimination of theheater 213. -
FIG. 4 is a cross-sectional view of a metal-molding-system valve 400 (hereafter referred to as “thevalve 400”) according to the fourth exemplary embodiment. To facilitate an understanding of the fourth exemplary embodiment, elements of the fourth exemplary embodiment (that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a four-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment). For example, the valve body of the fourth exemplary embodiment is labeled 404 rather than being labeled 104, etc. - A
cooling mechanism 416 is used to form thethixo plug 406. Thecooling mechanism 416 cooperates with thebarrel 414. Thecooling mechanism 416 is positioned adjacent to thevalve body 404 along the barrelouter wall 429. Thecooling mechanism 416 removes heat from the barrelouter wall 429 adjacent to a region proximate to where thevalve body 404 is located. Thecooling mechanism 416 delivers a coolant fluid 425 (under pressure) toward the end of the recovery phase to form (at least in part) theplug 406. -
FIGS. 5A to 5C are cross-sectional views of metal-molding-system valves valves valves features valve body 504 has alongitudinal axis 562 that extends from the center therethrough. -
FIG. 5A shows thevalve 500A that includes the melt-receivingfeature 524A that has a plurality of rectangular-shapedgrooves longitudinal axis 562. The rectangular-shapedgrooves grooves -
FIG. 5B shows thevalve 500B that includes the melt-receivingfeature 524B that has a plurality of v-shapedgrooves grooves grooves -
FIG. 5C shows thevalve 500C that includes the melt-receivingfeature 524C that has semispherical-shapedgrooves grooves grooves longitudinal axis 562. - According to a variant (not depicted), the melt-receiving
features valve body 504. According to another variant (not depicted), the melt-receivingfeatures valve body 504, and the side walls of thebody 504 are tapered towards a front end of the body 504 (towards the top side ofFIG. 5 ). -
FIGS. 6A to 6C are cross-sectional views of a metal molding-system valve 600 (hereafter referred to as ”the valve 600) according to the sixth embodiment. To facilitate an understanding of the sixth exemplary embodiment, elements of the sixth exemplary embodiment (that are similar to those of the first exemplary embodiment) are identified by reference numerals that use a six-hundred designation rather than a one-hundred designation (as used in the first exemplary embodiment). For example, the mold body of the sixth exemplary embodiment is labeled 604 rather than being labeled 104. Thevalve features -
FIG. 6A shows the valve 600 that includes the melt-receivingfeature 624A that has a plurality of rectangular-shapedrecesses 670 that are aligned (in rows) orthogonally to a surface of thevalve body 604. The rectangular-shapedrecesses 670 are arrayed successively at calculated offset distances from one another. The arrangement of the rectangular-shapedrecesses 670 is not limited to this configuration (for example: they may be irregularly spaced and/or inclined non-orthogonally from a longitudinal axis of thevalve body 604 and/or placed in a random pattern onto the valve body 604). -
FIG. 6B shows thevalve 600B that includes the melt-receivingfeature 624B includes a plurality of conically-shapedrecesses 672. The conically-shapedrecess 672 are arrayed successively at calculated offset distances from one another. The arrangement of the conically-shapedrecesses 672 is not limited to this configuration (for example: they may be irregularly spaced apart, etc). -
FIG. 6C shows thevalve 600C that includes the melt-receivingfeature 624C that has semispherical-shapedrecesses 674. The semispherical-shapedrecesses 674 are arrayed successively at a calculated offset distance from each other. The arrangement of the semispherical-shapedrecesses 674 is not limited to this configuration (for example: they may be irregularly spaced apart, etc). - According to a variant (not depicted), the melt-receiving
features valve body 604. According to another variant (not depicted), the melt-receivingfeatures valve body 604, and the side walls of thebody 604 are tapered towards a front end of the body 604 (towards the top side ofFIG. 6 ). According to another variant, the melt-receiving feature 624 includes a plurality of divots. - The description of the exemplary embodiments provides examples of the present invention, and these examples do not limit the scope of the present invention. It is understood that the scope of the present invention is limited by the claims. The concepts described above may be adapted for specific conditions and/or functions, and may be further extended to a variety of other applications that are within the scope of the present invention. Having thus described the exemplary embodiments, it will be apparent that modifications and enhancements are possible without departing from the concepts as described. Therefore, what is to be protected by way of letters patent are limited only by the scope of the following claims:
Claims (74)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US11/489,981 US20080017345A1 (en) | 2006-07-20 | 2006-07-20 | Molding-system valve |
CA002654023A CA2654023A1 (en) | 2006-07-20 | 2007-06-26 | Molding-system valve |
LU91514A LU91514B1 (en) | 2006-07-20 | 2007-06-26 | Molding System Valve |
PCT/CA2007/001107 WO2008009098A1 (en) | 2006-07-20 | 2007-06-26 | Molding-system valve |
TW096124782A TW200819224A (en) | 2006-07-20 | 2007-07-06 | Molding-system valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/489,981 US20080017345A1 (en) | 2006-07-20 | 2006-07-20 | Molding-system valve |
Publications (1)
Publication Number | Publication Date |
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US20080017345A1 true US20080017345A1 (en) | 2008-01-24 |
Family
ID=38956462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/489,981 Abandoned US20080017345A1 (en) | 2006-07-20 | 2006-07-20 | Molding-system valve |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080017345A1 (en) |
CA (1) | CA2654023A1 (en) |
LU (1) | LU91514B1 (en) |
TW (1) | TW200819224A (en) |
WO (1) | WO2008009098A1 (en) |
Cited By (4)
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US20120111522A1 (en) * | 2010-11-05 | 2012-05-10 | Bullied Steven J | Die casting system machine configurations |
US20140311698A1 (en) * | 2011-11-10 | 2014-10-23 | Mold-Thix-Consulting Bueltermann Gmbh | Device, System and Method for Die-Casting Metallic Material in the Thixotropic State |
US20140319188A1 (en) * | 2011-11-15 | 2014-10-30 | Ferrofacta Gmbh | Die casting nozzle and method for operating a die casting nozzle |
US11235526B2 (en) * | 2018-11-07 | 2022-02-01 | Seiko Epson Corporation | Plasticizing device, three-dimensional modeling device, and injection molding device |
Families Citing this family (2)
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US20120111524A1 (en) * | 2010-11-05 | 2012-05-10 | Schlichting Kevin W | Shot tube plunger for a die casting system |
CN110695335A (en) * | 2019-10-24 | 2020-01-17 | 上海五腾金属制品有限公司 | Device and method for realizing magnesium alloy injection molding |
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- 2007-06-26 WO PCT/CA2007/001107 patent/WO2008009098A1/en active Application Filing
- 2007-06-26 LU LU91514A patent/LU91514B1/en active
- 2007-07-06 TW TW096124782A patent/TW200819224A/en unknown
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Also Published As
Publication number | Publication date |
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TW200819224A (en) | 2008-05-01 |
WO2008009098A1 (en) | 2008-01-24 |
LU91514B1 (en) | 2009-05-17 |
CA2654023A1 (en) | 2008-01-24 |
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