US3748885A - Extrusion machine - Google Patents

Extrusion machine Download PDF

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Publication number
US3748885A
US3748885A US00097418A US3748885DA US3748885A US 3748885 A US3748885 A US 3748885A US 00097418 A US00097418 A US 00097418A US 3748885D A US3748885D A US 3748885DA US 3748885 A US3748885 A US 3748885A
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Prior art keywords
core
die
extrusion
cylinder
base
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Expired - Lifetime
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US00097418A
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English (en)
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R Creuzet
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies

Definitions

  • ABSTRACT A thermal-extrusion machine is disclosed with an extrusion head for the production of metal sections and tubes, particularly of light copper-based alloys.
  • the extrusion head comprises a core coaxially received in an aperture of an associated die.
  • the core is supported by bridging means in the form of webs angularly equispaced about the axis thereof.
  • a chamber is formed in the head and downstream of the webs, to transverse section of the chamber being sufficiently small to let the pressure of the material being extruded fuse the strands formed by the material passing the webs and reuniting in the chamber.
  • Robert CREUZET BY (Karl 6R0 Attorney EXTRUSION MACHINE My present invention relates to the manufacture by thermal extrusion of fusible tubes, sections or analogous elements of metal compositions, in particular light alloys.
  • the extrusion head according to the invention overcomes this problem.
  • the chamber into which emerge the strands of material during extrusion and after passing beyond the bridging portions supporting the core has a transverse section sufficiently small in order that, under the effect of extrusion of the material the pressure within the material in the chamber is sufficiently high to fuse the seams resulting from the joining in the chamber of the strands that have passed beyond the bridging portions.
  • the arrangement and the configuration of the bridging portions or webs is such that from the extrusion piston the material progresses towards the axis of the head with a transverse flow section which progressively decreases towards the chamber for reuniting the strands.
  • FIG. 1 is a front view of a head of an extrusion machine according to the invention
  • FIG. 2 is a rear view thereof
  • FIG. 3 is a view in section along line 3-3 of FIG. 1;
  • FIG. 4 is a view in section along line 4-4 of FIG. 1;
  • FIG. 5 is a view in section along line 5-5 of FIG. 2;
  • FIG. 6 is a view in transverse section of the contents of the extrusion cylinder taken along line 6-6 in FIG.
  • FIG. 7 is a view similar to that of FIG. 6 as taken on the line 7-7 of FIG. 5;
  • FIG. 8 is a view similar to the two preceding Figures as taken along line 8-8 of FIG. 5;
  • FIG. 9 is a view similar to the preceding Figures but taken along line 9-9 of FIG. 5;
  • FIG. 10 is a view similar to the preceding Figures but taken along line 10-10 of FIG. 5; and;
  • FIG. 11 is a view similar to the preceding views as taken along line 11 ll of FIG. 5.
  • annular clearance or extrusion gap 10 is provided between a central core 13 and a discharge aperture a of the die 12.
  • the cylindrical surface 14 of the aperture 11 is confronted by, the needle 13 has an outer cylindrical surface 15 of core 13.
  • the core 13 is part of an extrusion head 17 having an annular base 18 with a cylindrical outer surface 19 in co-operating contact with the cylindrical inner surface 20 of a chamber or cylinder 21.
  • the base 18 has an outer rib 22 whose inner surface 23 engages with a cylindrical shoulder 24 of the body of the die 12.
  • the core 13 is connected to the base 18 by several (here four) webs or bridging portions, for example four 25,, 25 25 25 angularly equispaced about the axis 16.
  • Each wing has a body 26 bounded by two planar faces 27 and 28 which are parallel in the portion remote from the base 18 and converge along incurved flanks 29 and 30 which meet along a front edge 31 in axial planes 32 and 33, respectively (FIG. 2).
  • the section of a web body 26 cut by such a plane is bounded by an ridge line 34 relative to the axis 16; the outer surfaces of the webs meet along a central surface 35 with a rounded tip or rear end 36 substantially centered on the axis 16.
  • the opposite wing surface 35' is joined to the cylindrical surface 15 of the core 13 by an incurved surface 36', lying substantially in the transverse plane passing through the edge 31, and approach is the annular transverse face 37 of the die along a surface 38 which has substantially rectilinear and may therefore be regarded as frustoconical.
  • These generatrices, as shown in FIG. 5, are substantially parallel to the confronting flanks 29, 30 of the web.
  • the cylinder 21 When the cylinder 21 is filled with an extruding composition 42 as diagrammatically indicated in FIG. 3, for example a metal alloy, and this composition is subjected to an action of the extrusion piston 41, the more or less viscous mass heated within the cylinder divides into segments passing around the webs 25 -25
  • the circular cross section of the mass of the extruding composition upstream of the tip portion 36 equals that of the chamber 21 as is shown in FIG. 6.
  • the cross-section in the plane 7-7 has a surface area slightly less than that of the section in the line plane 6-6, the non-shaded part shown in FIG. 7 correspond to the webs which at this point have the shape of a cross with four arms.
  • the mass effectively divides into four spatially separated strands 42,, 42 42 42 (FIG. 8) as soon as it passes through the transverse section perpendicular to the axis 16 which is tangent to the outer face of the annular base 18 forming the support for the bridging portions.
  • tubes can be formed which not only profit from the precision owing to the use of a short core depending from bridging portions of an extrusion head, but which also have the same continuity as those obtained from a mass not divided into strands during compression.
  • the arrangement and the configuration of the arms or the bridging portions are chosen as a function of the metal section or tube to be produced and also of the nature of the alloy to be extruded in order to obtain the best grain structure.
  • the number of bridging portions may vary, according to the article to be produced, from a single one to several dozens.
  • An extruded article of light copper-base alloys according to the invention is distinguishable from those that have been obtained from standard extrusion heads by the precision of its configuration, perfectly concentric internal and external surfaces in the case of a tube and exact dimensions and thicknesses in the case of a different profitt, as well as by its homogeneity, the intertwining seams resulting from the joining of the strands being practically unnoticeable owing to the welding under pressure during extrusion.
  • An extrusion head for producing tubular objects from a fusible metalliccomposition comprising:
  • a cylinder adapted to be filled with a heated metallic mass
  • said die being provided with a discharge aperture
  • a support for said core in said cylinder comprising an annular base adjacent said die and bridging means extending from said base to said core, said bridging means forming with said base a passage for said mass narrowlng progressively toward said opening, said bridging means'terminating short of said die whereby a annular channel larger than said aperture is formed between said passage and said aperture, said channel being bounded by an inner peripheral surface of said base converging toward said opening;
  • plunger means in said cylinder for compressing said mass around said core and forcing the compressed mass through said passage and said channel into the clearance between said core and said die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US00097418A 1969-12-08 1970-12-04 Extrusion machine Expired - Lifetime US3748885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6942347A FR2082001A5 (fr) 1969-12-08 1969-12-08

Publications (1)

Publication Number Publication Date
US3748885A true US3748885A (en) 1973-07-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00097418A Expired - Lifetime US3748885A (en) 1969-12-08 1970-12-04 Extrusion machine

Country Status (3)

Country Link
US (1) US3748885A (fr)
JP (1) JPS4946707B1 (fr)
FR (1) FR2082001A5 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858426A (en) * 1972-08-11 1975-01-07 Alusuisse Extrusion press tool for the production of hollow sections
EP0377947A2 (fr) * 1989-01-13 1990-07-18 Sankyo Aluminium Industry Company Limited Matrice d'extrusion de métaux
EP0398747A1 (fr) * 1989-05-18 1990-11-22 Bwe Limited Appareil d'extrusion continue
US5061163A (en) * 1988-07-19 1991-10-29 United Kingdom Atomic Energy Authority Die assembly
US20070283736A1 (en) * 2005-09-08 2007-12-13 Showa Denko K.K. Extrusion Die for Metallic Material
EP2040861A1 (fr) * 2006-07-07 2009-04-01 Showa Denko K.K. Filière d'extrusion de matière métallique
EP2049277A1 (fr) * 2006-10-03 2009-04-22 Showa Denko K.K. Filière d'extrusion de matériau métallique
US20100095730A1 (en) * 2007-01-12 2010-04-22 Showa Denko K.K. Die assembly tool for extrusion molding
US20100107716A1 (en) * 2007-01-31 2010-05-06 Showa Denko K.K. Die for extrusion molding of metal material
US20100132430A1 (en) * 2008-12-03 2010-06-03 Ping-Hsun Tsai Extrusion die device
CN102773298A (zh) * 2011-05-10 2012-11-14 贵阳恒威铝散热材料有限公司 一种铝合金圆管扇形分流热挤压模具
CN104550298A (zh) * 2014-12-25 2015-04-29 上海友升铝业有限公司 用于挤压拉拔圆管的模具

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8823700D0 (en) * 1988-10-10 1988-11-16 Atomic Energy Authority Uk Improved die assembly
JP2006142325A (ja) * 2004-11-17 2006-06-08 Kobe Steel Ltd アルミ合金形材の押出用ブリッジダイス
JP4938505B2 (ja) * 2006-06-23 2012-05-23 昭和電工株式会社 金属材料の押出成形用ダイス
JP4938504B2 (ja) * 2006-07-21 2012-05-23 昭和電工株式会社 金属材料の押出成形用ダイス
JP4938501B2 (ja) * 2007-03-07 2012-05-23 昭和電工株式会社 金属材料の押出成形工具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157988A (en) * 1936-12-17 1939-05-09 Andrews Lead Company Inc Method and machine for making pipe
US2638213A (en) * 1948-10-14 1953-05-12 Dalton H Clark Extrusion die for tubing
US3527079A (en) * 1966-08-01 1970-09-08 Dow Chemical Co Feeder hole die with improved metal flow

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157988A (en) * 1936-12-17 1939-05-09 Andrews Lead Company Inc Method and machine for making pipe
US2638213A (en) * 1948-10-14 1953-05-12 Dalton H Clark Extrusion die for tubing
US3527079A (en) * 1966-08-01 1970-09-08 Dow Chemical Co Feeder hole die with improved metal flow

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858426A (en) * 1972-08-11 1975-01-07 Alusuisse Extrusion press tool for the production of hollow sections
US5061163A (en) * 1988-07-19 1991-10-29 United Kingdom Atomic Energy Authority Die assembly
EP0377947A2 (fr) * 1989-01-13 1990-07-18 Sankyo Aluminium Industry Company Limited Matrice d'extrusion de métaux
US4976130A (en) * 1989-01-13 1990-12-11 Sankyo Aluminum Industry Company Limited Extruding die for metallic materials
EP0377947A3 (fr) * 1989-01-13 1991-02-06 Sankyo Aluminium Industry Company Limited Matrice d'extrusion de métaux
EP0398747A1 (fr) * 1989-05-18 1990-11-22 Bwe Limited Appareil d'extrusion continue
WO1990014176A1 (fr) * 1989-05-18 1990-11-29 Bwe Limited Appareil de filage continu
US5152163A (en) * 1989-05-18 1992-10-06 Bwe Limited Continuous extrusion apparatus
US8104318B2 (en) 2005-09-08 2012-01-31 Showa Denko K.K. Extrusion die for metallic material
US20070283736A1 (en) * 2005-09-08 2007-12-13 Showa Denko K.K. Extrusion Die for Metallic Material
KR101280739B1 (ko) 2005-09-08 2013-07-01 쇼와 덴코 가부시키가이샤 금속성 재료의 압출 다이
EP2040861A4 (fr) * 2006-07-07 2010-03-17 Showa Denko Kk Filière d'extrusion de matière métallique
EP2040861A1 (fr) * 2006-07-07 2009-04-01 Showa Denko K.K. Filière d'extrusion de matière métallique
US20090293570A1 (en) * 2006-07-07 2009-12-03 Showa Denko K.K. Extrusion die for metallic material
EP2049277A4 (fr) * 2006-10-03 2010-03-17 Showa Denko Kk Filière d'extrusion de matériau métallique
US20100095731A1 (en) * 2006-10-03 2010-04-22 Showa Denko K.K. Extrusion die for metallic material
EP2049277A1 (fr) * 2006-10-03 2009-04-22 Showa Denko K.K. Filière d'extrusion de matériau métallique
US20100095730A1 (en) * 2007-01-12 2010-04-22 Showa Denko K.K. Die assembly tool for extrusion molding
US20100107716A1 (en) * 2007-01-31 2010-05-06 Showa Denko K.K. Die for extrusion molding of metal material
US8181500B2 (en) * 2007-01-31 2012-05-22 Showa Denko K.K. Die for extrusion molding of metal material
US20100132430A1 (en) * 2008-12-03 2010-06-03 Ping-Hsun Tsai Extrusion die device
US8240181B2 (en) * 2008-12-03 2012-08-14 Metal Industries Research & Development Centre Extrusion die device
CN102773298A (zh) * 2011-05-10 2012-11-14 贵阳恒威铝散热材料有限公司 一种铝合金圆管扇形分流热挤压模具
CN104550298A (zh) * 2014-12-25 2015-04-29 上海友升铝业有限公司 用于挤压拉拔圆管的模具

Also Published As

Publication number Publication date
JPS4946707B1 (fr) 1974-12-11
FR2082001A5 (fr) 1971-12-10

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