WO1984004070A1 - Method of manufacturing extruded pipes and apparatus for carrying out the method - Google Patents
Method of manufacturing extruded pipes and apparatus for carrying out the method Download PDFInfo
- Publication number
- WO1984004070A1 WO1984004070A1 PCT/SE1984/000128 SE8400128W WO8404070A1 WO 1984004070 A1 WO1984004070 A1 WO 1984004070A1 SE 8400128 W SE8400128 W SE 8400128W WO 8404070 A1 WO8404070 A1 WO 8404070A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gap
- pipe
- space
- slit
- orientation
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
Definitions
- This invention relates to a method of manufacturing extruded pipes where plasticized material, for example plastic material, is advanced to an extrusion nozzle comprising a circular gap.
- the invention also relates to an apparatus for carrying out the method.
- the material is transported through an extrusion nozzle substantially only in parallel with the longitudinal direction of the extruded pipe, whereby the molecules of the material are oriented in said longitudinal direction.
- the orientation thus obtained brings about a certain reinforclement effect in said longitudinal direction, but not, for example, in the circumferential direction of the pipe.
- the present invention relates to a method and an apparatus, at which orientation occurs in several directions and thereby bring about reinforcement in several directions. It is hereby possible to reduce the necessary wall thickness for definite strength properties and thereby to reduce the amount of plastic or the like.
- the invention thus, relates to a method of manufacturing extruded pipes, where plasticized material, for example plastic material, is advanced to an extrusion nozzle comprising a circular gap.
- the method is especially characterized in that the material is transported axially in said gap while material is caused to move, such as to rotate, in the circumferential direction of the gap, so that the material at least partially is caused to assume an orientation deviating from the axial direction, whereby non-axial orientation will prevail in the extruded pipe and increase the strength.
- the invention also relates to an apparatus for manufacturing extruded pipes, comprising devices for advancing plasticized material, for example plastic material, to an extrusion nozzle comprised in the apparatus, which nozzle comprises a circular gap, through which material is intended to pass in axial direction.
- the apparatus is especially characterized in that it comprises devices for moving, for example rotating, material substantially in the circumferential direction of the gap, so that the material at least partially is caused to assume an orientation deviating from the axial direction, whereby non-axial orientation will prevail in the extruded pipe and increase the strength.
- Fig. 1 is a schematically shown central section in parallel with the longitudinal direction of the extrusion nozzle at a first embodiment of an apparatus according to the invention
- Fig. 2 shows a slitted tubular body intended to be placed rotatably in the circular gap of the extrusion nozzle
- Fig. 3 is a view from the right in Pig. 2 of the body according to Fig. 2
- Fig. 4 shows schematically an extruded pipe according to the invention adjacent the outer end of the nozzle according to Fig. 1, Fig.
- FIG. 5 shows schematically a portion of a second embodiment of the extrusion nozzle at an apparatus according to the invention, seen from the outer end of the nozzle
- Fig. 6 is a vertical central section through a portion of the nozzle according to Fig. 5
- Fig. 7 shows schematically a portion of a third embodiment of the nozzle at an apparatus according to the invention, seen as in Fig. 5
- Fig. 8 is a vertical central section through a portion of the nozzle acc ⁇ ording to Fig. 7
- Fig. 9 is a perspective view of a portion of a pipe manufactured by the apparatus aceo-ding to Figs. 5 and 6.
- the numeral 1 designates a feed passageway for the supply of plasticized material, for example so-called HD-polyethene or PVC, to the extrusion nozzle. Also other material, such as rubber, can be extruded.
- the nozzle comprises a circular gap 2, through which material is intended to pass in axial direction, and where a pipe 3, Fig. 4, formed of the material is intended to run out through the gap 2 at the outer end 4 of the nozzle.
- a forming space 2' is located, which at the embodiment according to Fig. 1 constitutes a portion of the gap 2.
- the gap 2 is defined by an outer defining wall 5, which preferably consists of the shell surface 5 of a bore in a block 6 or the like, and an inner defining wall 7, which preferably consists of the shell surface 7 of an axle 8 or the like, which is located concentrically in said bore and enters the bore where the bore joins the feed passageway 1, i.e. at the infeed space 1 for material to the gap 2.
- a tubular body 9, a pipe 9, is located rotatably and concentrically in the gap 2.
- Said tubular body 9 is intended to move, rotate the material in the circumferential direction of the gap 2 over the entire cross-section of the gap 2 and, thus, also adjacent the inner defining wall 7 and the outer defining wall 5 of the gap 2.
- the pipe 9 is guided in the gap 2 by means of the axle 8 and bore.
- the pipe 9 is provided with a gearwheel 11 or the like intended to co-operate with an additional gearwheel 12 or the like connected to a drive equipment (not shown).
- the pipe 9 comprises at least one longitudinal slit 13, Figs. 1-4, extending from the infeed space 1' to the forming space 2' at the outer end 4 of the nozzle where the end 13" of the slit 13 joining the space 2' , thus, constitutes a rotatable outlet 13" for material.
- two pipes 14, 15, tubular bodies 14, 15, one dinner one 14 and one outer one 15, join said inner defining wall 7 and, respectively, outer defining wall 5 and are rotatable preferably in opposed directions as indicated by the arrows in Fig. 5 and form between themselves a space 16 for substantially axial transport of material.
- Each pipe 14, 15 comprises at least one longitudinal slit 17, 18, which preferably extend from the infeed space 1' all the way to the forming space 2' , where outlets 17", 18", thus, are located.
- Fig. 6 an embodiment is shown by fully drawn lines, where the space 16 and slit 17 are intended to be fed with material from the space 1' via the slit 18.
- slit 14, and thereby also the space 16 also are fed with material via recesses 19 in the outer pipe 15, where the recesses 19 are in contact with the space 1' and slit 17, as shown by dashed line in Fig. 6.
- two pipes 20,21 are provided, an inner one 20 and an outer one 21, which join said inner defining wall 7 and, respectively, outer defining wall 5, and preferably are rotatable in opposed directions.
- the pipes 20, 21 join each other so that there is substantially no space 16 between the pipes.
- each pipe 20, 21 comprises at least one slit 22 and, respectively, 23, which extend in a way corresponding substantially to the slits 17, 18 and comprise outlets 22", 23".
- the slit 22 in the inner pipe 20 preferably is supplied with material from the space 1, 1' via recesses 24 in the outer pipe 21, as shown schematically in Fig. 8.
- the outer layer 18' is brought about by means of the slit 18 of the pipe 15 and extends helically with clockwise pitch.
- the intermediate layer 16' is brought about by means of the space 16 between the pipes 14,15 and extends substantially with axial orientation.
- the inner layer 17' is brought about by means of the slit 17 of the pipe 14 and extends helically with counter-clockwise pitch.
- the thickness of the space 16 can be varied as desired, from thick to very thin or non-existent.
- continuously rotating tubular bodies, pipes were assumed to be comprised. It is, however, possible to use an oscillating rotation movement, which reciprocates in the circumferential direction of the gap 2. In this case the material will be laid out in an obvious manner in subsequent helical sections with alternating pitch direction.
- the defining walls 5,7 of the gap 2 are rotatable, preferably in opposed directions, whereby the material is moved in the circumferential direction of the gap 2 at least adjacent said defining walls during the axial material transport.
- the defining walls can be rotated in the substantial gap 2 and/or the forming space 2' defining the walls. It is also imaginable that only one wall is rotated.
- Embodiments can also be imagined which lack the substantial gap 2, and material is transported ih at least one closed passageway in a rotatable body all the way to outlets at the forming space 2' located in circumferential direction of the forming space 2'.
- the gap 2 thus, consists only of the forming space 2'.
- two strands are laid out, Fig.9 , one outer strand 18' and one inner strand 17' , in preferably opposedly directed helical configurations, forming an outer portion 18' and an inner portion 17', while the intermediate portion 16' is discharged substantially axially, whereby differences in preferred orientazion of the molecules arise in the intermediate layer 16', on one hand, and in the outer layer 18' and inner layer 17' , on the other hand. Purther differences in orientation arise adjacent the outer portion of the portion 18' and inner portion of the portion 17' , due to the rotation and friction against the defining walls of the gap 2, as described above. At the embodiment according to Figs. 5 and 6, more extensive differences in orientation are obtained than at the embodiment according to Figs. 1-4.
- the invention renders it possible to manufacture reinforced pipes in a very simple and inexpensive way, where reinforcement is obtained by differences in preferred orient _o M ro - - o .
- U1 o vn ct Ct ⁇ rt H ro " ⁇ P Xi o > *_ H « Hi r-3 o H- > ct 1-3 oq o rt _r _y- o o P 4 O P O ⁇ " ⁇ P o tr P P o P 4 P in ⁇ CO -l ⁇ P- hi ct o H oq •_ ⁇ H- ⁇ ⁇ ⁇ P ro .
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR8406800A BR8406800A (en) | 1983-04-12 | 1984-04-09 | METHOD AND APPLIANCE FOR MANUFACTURING EXTRUDED PIPES |
DE8484901814T DE3465037D1 (en) | 1983-04-12 | 1984-04-09 | Method of manufacturing extruded pipes and apparatus for carrying out the method |
AT84901814T ATE28596T1 (en) | 1983-04-12 | 1984-04-09 | METHOD OF MANUFACTURE OF PRESSED TUBES AND APPARATUS FOR PERFORMING. |
FI844881A FI74905C (en) | 1983-04-12 | 1984-12-11 | Process for producing extruded tubes and apparatus for carrying out the process. |
DK592184A DK592184A (en) | 1983-04-12 | 1984-12-11 | PROCEDURE FOR THE MANUFACTURING OF EXTRADED BEETS AND APPARATUS FOR EXERCISING THE PROCEDURE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8302033A SE435598B (en) | 1983-04-12 | 1983-04-12 | PROCEDURE AND DEVICE FOR MANUFACTURING EXTRUDED Pipes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1984004070A1 true WO1984004070A1 (en) | 1984-10-25 |
Family
ID=20350771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1984/000128 WO1984004070A1 (en) | 1983-04-12 | 1984-04-09 | Method of manufacturing extruded pipes and apparatus for carrying out the method |
Country Status (9)
Country | Link |
---|---|
US (1) | US4686075A (en) |
EP (1) | EP0145726B1 (en) |
JP (1) | JPS60501053A (en) |
BR (1) | BR8406800A (en) |
DE (1) | DE3465037D1 (en) |
FI (1) | FI74905C (en) |
NO (1) | NO844952L (en) |
SE (1) | SE435598B (en) |
WO (1) | WO1984004070A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6132668A (en) * | 1985-09-26 | 2000-10-17 | Foster-Miller, Inc. | Biaxially oriented ordered polymer films |
DE3632185A1 (en) * | 1986-09-23 | 1988-03-31 | Battenfeld Maschfab | DEVICE FOR PRODUCING PLASTIC MOLDED BODIES |
US4836969A (en) * | 1987-04-30 | 1989-06-06 | Cemtech Laboratories Inc. | Method of casting a structure from cementitious |
US4859165A (en) * | 1988-12-27 | 1989-08-22 | Yugenkaisha Matsubei | Extruder for food |
JP2994425B2 (en) * | 1990-04-27 | 1999-12-27 | 東海興業株式会社 | Automotive hollow seal material and molding method thereof |
FR2673569B1 (en) * | 1991-03-07 | 1994-08-26 | Inst Francais Du Petrole | PROCESS FOR MANUFACTURING TUBES OF THERMOPLASTIC MATERIALS REINFORCED BY FIBERS WITH CONTROLLED ORIENTATION AND APPARATUS FOR IMPLEMENTING SAME. |
US5217667A (en) * | 1991-05-07 | 1993-06-08 | Progressive Polymerics, Inc. | Method for making conduits having a shock absorbing shell |
US6056533A (en) * | 1998-03-19 | 2000-05-02 | The Lamson & Sessions Co. | Apparatus for conduit extrusion |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1845249A (en) * | 1930-08-14 | 1932-02-16 | Fiberloid Corp | Method of extruding plastics |
GB433245A (en) * | 1934-09-24 | 1935-08-12 | Oskar Walter Becker | Method and devices for the production of artificial sausage skins |
US3279501A (en) * | 1965-01-28 | 1966-10-18 | Dow Chemical Co | Extrusion and product |
US3394433A (en) * | 1964-03-16 | 1968-07-30 | Dow Chemical Co | Apparatus for extruding plastic tubes with cross-ribbed surfaces |
DE2917768A1 (en) * | 1978-05-03 | 1979-11-15 | Gottlieb Looser | ROTATING FILM BLOW HEAD FOR THE PRODUCTION OF TUBULAR FILMS FROM PLASTIC |
SU722776A1 (en) * | 1978-03-09 | 1980-03-28 | Предприятие П/Я В-8406 | Extrusion head for making articles from polymeric materials |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR957917A (en) * | 1950-02-28 | |||
US2046541A (en) * | 1932-06-04 | 1936-07-07 | Firm Naturin Gmbh | Device for producing artificial sausage skins from pasty fibrous masses of animal orvegetable origin |
US2345086A (en) * | 1936-01-11 | 1944-03-28 | Becker Oskar Walter | Apparatus for the manufacture of artificial sausage skins |
US2676356A (en) * | 1949-09-23 | 1954-04-27 | Unda Anstalt | Device for the production of tubular membranes such as sausage skins |
NL298633A (en) * | 1962-10-11 | 1900-01-01 | ||
US3221372A (en) * | 1963-09-16 | 1965-12-07 | Johnson & Johnson | Apparatus for extruding collagen fibrils |
US3289251A (en) * | 1964-03-16 | 1966-12-06 | Zimmermann & Jansen Gmbh | Extruder (screw type) for the profiling of plastic materials i. e., plastics getters, earthy masses, etc. |
NL6413790A (en) * | 1964-11-27 | 1966-05-31 | ||
US3317956A (en) * | 1964-12-22 | 1967-05-09 | Hedwin Corp | Mixing device for extruding apparatus |
US3479989A (en) * | 1967-11-28 | 1969-11-25 | Eastman Kodak Co | Extrusion coating apparatus |
US3933960A (en) * | 1970-09-11 | 1976-01-20 | Btr Industries Limited | Method of extruding fiber reinforced plural layered plastic tubes |
CH541414A (en) * | 1971-12-17 | 1973-09-15 | Ki Polt I | Extruder for processing polymer materials |
SU493364A1 (en) * | 1972-02-28 | 1975-11-28 | Специальное Конструкторское Бюро Полимерного Машиностроения | Extrusion head for the manufacture of polymer pipes of the type "pipe in pipe" |
US4060361A (en) * | 1975-01-16 | 1977-11-29 | Devro, Inc. | Extruder apparatus for forming a tubular casing |
US4057610A (en) * | 1975-07-25 | 1977-11-08 | Monsanto Company | Hose reinforced with discontinuous fibers oriented in the radial direction |
-
1983
- 1983-04-12 SE SE8302033A patent/SE435598B/en unknown
-
1984
- 1984-04-09 BR BR8406800A patent/BR8406800A/en unknown
- 1984-04-09 EP EP84901814A patent/EP0145726B1/en not_active Expired
- 1984-04-09 JP JP59501769A patent/JPS60501053A/en active Pending
- 1984-04-09 US US06/681,849 patent/US4686075A/en not_active Expired - Fee Related
- 1984-04-09 WO PCT/SE1984/000128 patent/WO1984004070A1/en active IP Right Grant
- 1984-04-09 DE DE8484901814T patent/DE3465037D1/en not_active Expired
- 1984-12-11 NO NO844952A patent/NO844952L/en unknown
- 1984-12-11 FI FI844881A patent/FI74905C/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1845249A (en) * | 1930-08-14 | 1932-02-16 | Fiberloid Corp | Method of extruding plastics |
GB433245A (en) * | 1934-09-24 | 1935-08-12 | Oskar Walter Becker | Method and devices for the production of artificial sausage skins |
US3394433A (en) * | 1964-03-16 | 1968-07-30 | Dow Chemical Co | Apparatus for extruding plastic tubes with cross-ribbed surfaces |
US3279501A (en) * | 1965-01-28 | 1966-10-18 | Dow Chemical Co | Extrusion and product |
SU722776A1 (en) * | 1978-03-09 | 1980-03-28 | Предприятие П/Я В-8406 | Extrusion head for making articles from polymeric materials |
DE2917768A1 (en) * | 1978-05-03 | 1979-11-15 | Gottlieb Looser | ROTATING FILM BLOW HEAD FOR THE PRODUCTION OF TUBULAR FILMS FROM PLASTIC |
Also Published As
Publication number | Publication date |
---|---|
BR8406800A (en) | 1985-03-19 |
FI74905C (en) | 1988-04-11 |
DE3465037D1 (en) | 1987-09-03 |
FI74905B (en) | 1987-12-31 |
US4686075A (en) | 1987-08-11 |
NO844952L (en) | 1984-12-11 |
JPS60501053A (en) | 1985-07-11 |
SE8302033D0 (en) | 1983-04-12 |
FI844881L (en) | 1984-12-11 |
EP0145726A1 (en) | 1985-06-26 |
FI844881A0 (en) | 1984-12-11 |
EP0145726B1 (en) | 1987-07-29 |
SE435598B (en) | 1984-10-08 |
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