US20150283604A1 - Casting mold having beveled end faces on inner walls - Google Patents
Casting mold having beveled end faces on inner walls Download PDFInfo
- Publication number
- US20150283604A1 US20150283604A1 US14/443,105 US201314443105A US2015283604A1 US 20150283604 A1 US20150283604 A1 US 20150283604A1 US 201314443105 A US201314443105 A US 201314443105A US 2015283604 A1 US2015283604 A1 US 2015283604A1
- Authority
- US
- United States
- Prior art keywords
- casting mold
- beveled
- end faces
- wall elements
- face
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
Definitions
- the invention relates to a casting mold having on the inside walls with beveled end faces.
- Casting molds for producing hollow components having inner structures such as in the case of turbine blades, often have a plurality of ducts, into which liquid material propagates.
- gaps which represent connection elements in the later cast part are present between individual duct walls of the casting mold.
- an oxide layer often forms in this region because two liquid fronts collide in this intermediate region, these then forming an oxide film layer in this thin region.
- FIG. 1 shows a casting mold according to the prior art
- FIGS. 2 , 3 show casting molds according to aspects of the invention.
- FIG. 1 shows a casting mold 1 ′ according to the prior art.
- a propagation direction of a liquid metal introduced into the casting mold 1 ′ or the longitudinal direction of outer wall elements 4 ′, 4 ′′ and inner wall elements 7 ′, 7 ′′ of the casting mold 1 ′ is denoted by the reference sign 19 .
- the propagation direction 19 runs virtually parallel to the walls 4 ′, 4 ′′, 7 ′, 7 ′′ ( FIGS. 1 , 2 ); 103 ′, 103 ′′, 106 ′, 106 ′′ ( FIG. 3 ).
- the casting mold 1 ′ according to the prior art has the inner wall elements 7 ′, 7 ′′, which lie opposite one another as seen in the propagation direction 19 of the liquid metal to be poured in, the metal which has solidified in the casting mold 1 ′ between the outer wall elements 4 ′, 4 ′′ of the casting mold 1 ′ giving rise to walls 2 ′, 2 ′′ of a cast component.
- the inner wall elements 7 ′, 7 ′′ have an aperture 13 ′ for two arriving liquid fronts 22 ′, 22 ′′, into which 13 ′ the liquid metal penetrates and thereby forms an inner structure 25 ′, i.e. a connection between the walls 2 ′, 2 ′′ of the later cast component.
- Liquid fronts 22 V , 22 VI which have propagated are present in the region of the aperture 13 ′.
- a dashed line indicates the contact line 20 ′ of the liquid fronts 22 V , 22 VI , these not coalescing optimally in terms of melt metallurgy in the aperture 13 ′, possibly on account of oxide films on the liquid fronts 22 V , 22 VI .
- An end face 10 ′ of the inner wall element 7 ′ and an end face 10 ′′ of the opposing inner wall element 7 ′′ are formed perpendicular to the propagation direction 19 .
- FIG. 2 shows a casting mold 1 according to the invention, in which, in comparison to FIG. 1 , an end face 40 of an inner wall element 31 (analogous to 7 ′) has a different form.
- the end face 40 is beveled and runs at an angle differing from 90° to the propagation direction 19 or to the outer surface 50 of the inner wall element 31 .
- end face 40 of the inner wall elements 7 ′′, 31 around which the liquid front 22 ′, 22 ′′ passes first is beveled.
- the liquid front 34 , 37 of the liquid material is influenced, and an aperture 43 according to the invention, in which the two liquid fronts 34 , 37 collide, is shifted with its contact line 60 away from the beveled end face 40 and away from an aperture 43 between the end faces 10 ′′, 40 of the inner wall elements 7 ′′, 31 into a mechanically less critical region, such that a cast part with walls 54 ′, 54 ′′ which has a higher strength is formed.
- end faces 112 ′, 112 ′′ of in particular parallel inner wall elements 103 ′, 106 ′; 103 ′′, 106 ′′ running alongside one another can be beveled ( FIG. 3 ), these then being at an angle differing from 90° to the side surface 51 ′, 51 ′′.
- a further inner wall 55 is formed between the inner wall elements 103 ′, 106 ′, 103 ′′, 106 ′′ upon solidification of the metal.
- End faces 109 ′, 109 ′′ of the wall elements 103 ′, 103 ′′ lying opposite the beveled end faces 112 ′, 112 ′′ are advantageously not beveled, but instead run perpendicular to the propagation direction 19 or to the side surfaces 51 ′, 51 ′′ thereof.
- Apertures 53 ′ and, respectively, 53 ′′ are present between the inner wall element 103 ′, 106 ′ and 103 ′′, 106 ′′.
- the angle of the beveled end faces 40 , 112 ′, 112 ′′ to the propagation direction 19 can advantageously be between 45° and 60°.
Abstract
A casting mold for producing a hollow component having apertures and inner walls is provided, in which the casting mold has at least one inner wall element having apertures, into which liquid metal can also propagate, wherein at least one inner wall element has an end face in the region of the aperture, which end face is beveled and which runs at an angle differing from 90° to a propagation direction of the liquid metal or of side surfaces of the inner wall elements in the casting mold. Accordingly, the propagation front of liquid material in the casting mould is influenced by a specific modification of the end faces of inner wall elements and influences or the formation of oxide layers are displaced to less critical regions of the casting portal to be produced.
Description
- This application is the US National Stage of International Application No. PCT/EP2013/072382 filed Oct. 25, 2013, and claims the benefit thereof. The International Application claims the benefit of European Application No. EP12193768 filed Nov. 22, 2012. All of the applications are incorporated by reference herein in their entirety.
- The invention relates to a casting mold having on the inside walls with beveled end faces.
- Casting molds for producing hollow components having inner structures, such as in the case of turbine blades, often have a plurality of ducts, into which liquid material propagates.
- In this respect, gaps which represent connection elements in the later cast part are present between individual duct walls of the casting mold.
- Here, an oxide layer often forms in this region because two liquid fronts collide in this intermediate region, these then forming an oxide film layer in this thin region.
- It is therefore an object of the invention to solve the aforementioned problem.
- This object is achieved by a casting mold as claimed in the independent claim.
- The dependent claims list further advantageous measures which can be combined with one another as desired in order to achieve further advantages.
- In the drawing:
-
FIG. 1 shows a casting mold according to the prior art, -
FIGS. 2 , 3 show casting molds according to aspects of the invention. - The description and the figures represent only exemplary embodiments of the invention.
-
FIG. 1 shows a casting mold 1′ according to the prior art. - A propagation direction of a liquid metal introduced into the casting mold 1′ or the longitudinal direction of
outer wall elements 4′, 4″ andinner wall elements 7′, 7″ of the casting mold 1′ is denoted by thereference sign 19. - The
propagation direction 19 runs virtually parallel to thewalls 4′, 4″, 7′, 7″ (FIGS. 1 , 2); 103′, 103″, 106′, 106″ (FIG. 3 ). - The casting mold 1′ according to the prior art has the
inner wall elements 7′, 7″, which lie opposite one another as seen in thepropagation direction 19 of the liquid metal to be poured in, the metal which has solidified in the casting mold 1′ between theouter wall elements 4′, 4″ of the casting mold 1′ giving rise towalls 2′, 2″ of a cast component. - The
inner wall elements 7′, 7″ have anaperture 13′ for two arrivingliquid fronts 22′, 22″, into which 13′ the liquid metal penetrates and thereby forms aninner structure 25′, i.e. a connection between thewalls 2′, 2″ of the later cast component. -
Liquid fronts aperture 13′. A dashed line indicates thecontact line 20′ of theliquid fronts aperture 13′, possibly on account of oxide films on theliquid fronts liquid fronts 22′″, 22 IV run again as previously (=22′, 22″). - An
end face 10′ of theinner wall element 7′ and anend face 10″ of the opposinginner wall element 7″ are formed perpendicular to thepropagation direction 19. - Cracks sometimes arise within the
aperture 13′ if the metal solidifies in theinner structure 25′ of the filledaperture 13′ along the dashed line. -
FIG. 2 shows a casting mold 1 according to the invention, in which, in comparison toFIG. 1 , anend face 40 of an inner wall element 31 (analogous to 7′) has a different form. - The
end face 40 is beveled and runs at an angle differing from 90° to thepropagation direction 19 or to theouter surface 50 of theinner wall element 31. - It is advantageous that that
end face 40 of theinner wall elements 7″, 31 around which theliquid front 22′, 22″ passes first is beveled. - By virtue of this asymmetrical configuration of the
end face 40 of thewall element 31, theliquid front aperture 43 according to the invention, in which the twoliquid fronts contact line 60 away from thebeveled end face 40 and away from anaperture 43 between the end faces 10″, 40 of theinner wall elements 7″, 31 into a mechanically less critical region, such that a cast part withwalls 54′, 54″ which has a higher strength is formed. - Similarly, the end faces 112′, 112″ of in particular parallel
inner wall elements 103′, 106′; 103″, 106″ running alongside one another can be beveled (FIG. 3 ), these then being at an angle differing from 90° to theside surface 51′, 51″. - A further
inner wall 55 is formed between theinner wall elements 103′, 106′, 103″, 106″ upon solidification of the metal. -
End faces 109′, 109″ of thewall elements 103′, 103″ lying opposite thebeveled end faces 112′, 112″ are advantageously not beveled, but instead run perpendicular to thepropagation direction 19 or to theside surfaces 51′, 51″ thereof. -
Apertures 53′ and, respectively, 53″ are present between theinner wall element 103′, 106′ and 103″, 106″. - It is advantageous that all end faces 112′, 112″ are beveled to the same side.
- The angle of the beveled end faces 40, 112′, 112″ to the
propagation direction 19 can advantageously be between 45° and 60°. - The side to which the beveled end faces 40, 112′, 112″ face is immaterial.
- It is advantageous that the
entire end face
Claims (8)
1. A casting mold for producing a hollow component having apertures and inner walls, in which the casting mold has
at least one inner wall element having apertures, into which liquid metal can also propagate,
wherein at least one inner wall element has an end face in the region of the aperture, which end face is beveled and which runs at an angle differing from 90° to a propagation direction of the liquid metal or of side surfaces of the inner wall elements in the casting mold.
2. The casting mold as claimed in claim 1 ,
wherein the end face is at an angle of 45° to 60° to the propagation direction of the liquid metal or to the side surfaces of the inner wall elements.
3. The casting mold as claimed in claim 1 ,
wherein the casting mold has a plurality of inner wall elements,
wherein a plurality of inner wall elements have a bevel of the end faces, the end faces beveled in particular in each case to the same side.
4. The casting mold as claimed in claim 3 , wherein all beveled end faces are beveled to the same side.
5. The casting mold as claimed in claim 1 ,
wherein the propagation direction of the molten metal runs at least in places parallel to the inner wall elements.
6. The casting mold as claimed in claim 1 ,
wherein those end faces of the inner wall elements which lie opposite the beveled end faces of the inner wall elements are not beveled.
7. The casting mold as claimed in claim 1 ,
wherein the casting mold is made of ceramic.
8. The casting mold as claimed in claim 1 ,
wherein the beveled end faces are formed at the site where a molten metal propagates first.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12193768.4 | 2012-11-22 | ||
EP12193768.4A EP2735387A1 (en) | 2012-11-22 | 2012-11-22 | Mould with bevelled end faces in inner walls |
PCT/EP2013/072382 WO2014079651A1 (en) | 2012-11-22 | 2013-10-25 | Casting mould with chamfered end faces on inner walls |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150283604A1 true US20150283604A1 (en) | 2015-10-08 |
Family
ID=47227649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/443,105 Abandoned US20150283604A1 (en) | 2012-11-22 | 2013-10-25 | Casting mold having beveled end faces on inner walls |
Country Status (7)
Country | Link |
---|---|
US (1) | US20150283604A1 (en) |
EP (2) | EP2735387A1 (en) |
JP (1) | JP2015535487A (en) |
CN (1) | CN104812510A (en) |
IN (1) | IN2015DN03290A (en) |
RU (1) | RU2015124077A (en) |
WO (1) | WO2014079651A1 (en) |
Citations (19)
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US2312796A (en) * | 1941-10-27 | 1943-03-02 | Donald J Campbell | Casting metals |
US3542120A (en) * | 1965-05-27 | 1970-11-24 | United Aircraft Corp | Apparatus for producing single crystal metallic alloy objects |
US3897817A (en) * | 1973-08-27 | 1975-08-05 | Caterpillar Tractor Co | Sand casting mold |
US4062399A (en) * | 1975-12-22 | 1977-12-13 | Howmet Turbine Components Corporation | Apparatus for producing directionally solidified castings |
US4538671A (en) * | 1981-04-29 | 1985-09-03 | American Dental Association Health Foundation | Arc furnace for the production of small investment castings of reactive or refractory metals such as titanium |
US4549599A (en) * | 1978-10-19 | 1985-10-29 | United Technologies Corporation | Preventing mold and casting cracking in high rate directional solidification processes |
US4641703A (en) * | 1985-11-27 | 1987-02-10 | General Motors Corporation | Countergravity casting mold and core assembly |
US4982777A (en) * | 1988-08-22 | 1991-01-08 | Metal Casting Technology Inc. | Countergravity casting method and apparatus |
US5234047A (en) * | 1991-10-09 | 1993-08-10 | Rolls-Royce Plc | Mould for casting components |
US5791395A (en) * | 1996-12-16 | 1998-08-11 | Sarksiyan; Gevork | One shot multi-color metal casting method |
US5950705A (en) * | 1996-12-03 | 1999-09-14 | General Electric Company | Method for casting and controlling wall thickness |
US6467531B1 (en) * | 1999-10-18 | 2002-10-22 | Clyde D. Doney | Method and apparatus for producing investment castings in a vacuum |
US6860315B2 (en) * | 2001-07-26 | 2005-03-01 | Copeland Corporation | Green sand casting method and apparatus |
US20110293434A1 (en) * | 2010-06-01 | 2011-12-01 | Ching-Pang Lee | Method of casting a component having interior passageways |
US20130139990A1 (en) * | 2011-12-06 | 2013-06-06 | Michael Appleby | Systems, Devices, and/or Methods for Producing Holes |
US8662144B2 (en) * | 2011-10-03 | 2014-03-04 | Emerson Climate Technologies, Inc. | Methods of casting scroll compressor components |
US20140110077A1 (en) * | 2012-10-23 | 2014-04-24 | United Technologies Corporation | Casting Process and Apparatus |
US20140190650A1 (en) * | 2012-01-06 | 2014-07-10 | Wisys Technology Foundation, Inc. | Modular casting sprue assembly |
US20140271129A1 (en) * | 2013-03-12 | 2014-09-18 | Howmet Corporation | Cast-in cooling features especially for turbine airfoils |
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US4289191A (en) * | 1980-04-02 | 1981-09-15 | United Technologies Corporation | Injection molding thermoplastic patterns having ceramic cores |
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JP2001018048A (en) * | 1999-06-30 | 2001-01-23 | Sony Corp | Injection-formation of low melting point metallic material, injection-forming apparatus and box body |
US7296615B2 (en) * | 2004-05-06 | 2007-11-20 | General Electric Company | Method and apparatus for determining the location of core-generated features in an investment casting |
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US8413709B2 (en) * | 2006-12-06 | 2013-04-09 | General Electric Company | Composite core die, methods of manufacture thereof and articles manufactured therefrom |
EP2243574A1 (en) * | 2009-04-20 | 2010-10-27 | Siemens Aktiengesellschaft | Casting device for creating a turbine rotor blade of a gas turbine and turbine rotor blade |
JP4553271B1 (en) * | 2009-12-24 | 2010-09-29 | 株式会社古久根 | Casting method and reticulated disappearance model |
CN102078919B (en) * | 2010-12-17 | 2012-07-25 | 西安西工大超晶科技发展有限责任公司 | Precision casting method of double-layer thin-wall bent pipe casting |
-
2012
- 2012-11-22 EP EP12193768.4A patent/EP2735387A1/en not_active Withdrawn
-
2013
- 2013-10-25 EP EP13786645.5A patent/EP2890508A1/en not_active Withdrawn
- 2013-10-25 RU RU2015124077A patent/RU2015124077A/en not_active Application Discontinuation
- 2013-10-25 WO PCT/EP2013/072382 patent/WO2014079651A1/en active Application Filing
- 2013-10-25 US US14/443,105 patent/US20150283604A1/en not_active Abandoned
- 2013-10-25 CN CN201380061123.XA patent/CN104812510A/en active Pending
- 2013-10-25 IN IN3290DEN2015 patent/IN2015DN03290A/en unknown
- 2013-10-25 JP JP2015543364A patent/JP2015535487A/en active Pending
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2312796A (en) * | 1941-10-27 | 1943-03-02 | Donald J Campbell | Casting metals |
US3542120A (en) * | 1965-05-27 | 1970-11-24 | United Aircraft Corp | Apparatus for producing single crystal metallic alloy objects |
US3897817A (en) * | 1973-08-27 | 1975-08-05 | Caterpillar Tractor Co | Sand casting mold |
US4062399A (en) * | 1975-12-22 | 1977-12-13 | Howmet Turbine Components Corporation | Apparatus for producing directionally solidified castings |
US4549599A (en) * | 1978-10-19 | 1985-10-29 | United Technologies Corporation | Preventing mold and casting cracking in high rate directional solidification processes |
US4538671A (en) * | 1981-04-29 | 1985-09-03 | American Dental Association Health Foundation | Arc furnace for the production of small investment castings of reactive or refractory metals such as titanium |
US4641703A (en) * | 1985-11-27 | 1987-02-10 | General Motors Corporation | Countergravity casting mold and core assembly |
US4982777A (en) * | 1988-08-22 | 1991-01-08 | Metal Casting Technology Inc. | Countergravity casting method and apparatus |
US5234047A (en) * | 1991-10-09 | 1993-08-10 | Rolls-Royce Plc | Mould for casting components |
US5950705A (en) * | 1996-12-03 | 1999-09-14 | General Electric Company | Method for casting and controlling wall thickness |
US5791395A (en) * | 1996-12-16 | 1998-08-11 | Sarksiyan; Gevork | One shot multi-color metal casting method |
US6467531B1 (en) * | 1999-10-18 | 2002-10-22 | Clyde D. Doney | Method and apparatus for producing investment castings in a vacuum |
US6860315B2 (en) * | 2001-07-26 | 2005-03-01 | Copeland Corporation | Green sand casting method and apparatus |
US20110293434A1 (en) * | 2010-06-01 | 2011-12-01 | Ching-Pang Lee | Method of casting a component having interior passageways |
US8662144B2 (en) * | 2011-10-03 | 2014-03-04 | Emerson Climate Technologies, Inc. | Methods of casting scroll compressor components |
US20130139990A1 (en) * | 2011-12-06 | 2013-06-06 | Michael Appleby | Systems, Devices, and/or Methods for Producing Holes |
US20140190650A1 (en) * | 2012-01-06 | 2014-07-10 | Wisys Technology Foundation, Inc. | Modular casting sprue assembly |
US20140110077A1 (en) * | 2012-10-23 | 2014-04-24 | United Technologies Corporation | Casting Process and Apparatus |
US20140271129A1 (en) * | 2013-03-12 | 2014-09-18 | Howmet Corporation | Cast-in cooling features especially for turbine airfoils |
Also Published As
Publication number | Publication date |
---|---|
JP2015535487A (en) | 2015-12-14 |
CN104812510A (en) | 2015-07-29 |
WO2014079651A1 (en) | 2014-05-30 |
EP2890508A1 (en) | 2015-07-08 |
IN2015DN03290A (en) | 2015-10-09 |
EP2735387A1 (en) | 2014-05-28 |
RU2015124077A (en) | 2017-01-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AHMAD, FATHI;PAUL, UWE;REEL/FRAME:035646/0329 Effective date: 20150413 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |