EP0405685A1 - Extrusion die and holder therefor - Google Patents

Extrusion die and holder therefor Download PDF

Info

Publication number
EP0405685A1
EP0405685A1 EP90201681A EP90201681A EP0405685A1 EP 0405685 A1 EP0405685 A1 EP 0405685A1 EP 90201681 A EP90201681 A EP 90201681A EP 90201681 A EP90201681 A EP 90201681A EP 0405685 A1 EP0405685 A1 EP 0405685A1
Authority
EP
European Patent Office
Prior art keywords
die
extrusion
extrusion die
antechamber
die holder
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.)
Withdrawn
Application number
EP90201681A
Other languages
German (de)
French (fr)
Inventor
Hendrik Pieter Zwikker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcoa Nederland BV
Original Assignee
Alcoa Nederland BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alcoa Nederland BV filed Critical Alcoa Nederland BV
Publication of EP0405685A1 publication Critical patent/EP0405685A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • B21C25/025—Selection of materials therefor

Definitions

  • the invention relates to an extrusion die, comprising a body of hard, wear-resistant material in which one or more extrusion apertures are formed by means of spark erosion.
  • Such an extrusion die is known from, for example, GB-A-2,143,448, in which a steel body is used.
  • extrusion dies are very satisfactory for, for example, the extrusion of aluminium sections, their service life is limited, in other words, after a certain extrusion period the apertures are enlarged through wear in such a way that the extruded sections no longer meet the set requirements. For, extrusion takes place at high pressure and high temperature.
  • the material H.P. titanium diboride TiB2 which can be pressed to a body under high pressure and temperature and then has a very high density of at least 98%, is now available on the market.
  • the chemical composition is 31.12% B and 68.88% Ti.
  • the melting point lies at 3390 ⁇ 50 K.
  • the entire body is thus made from titanium diboride.
  • a die body of titanium diboride requires a special die holder, which is characterized in that it is made internally stepped, so that an antechamber is present in front of the inlet side of the extru­sion die.
  • the block of aluminium called a billet
  • the die plate of titanium diboride is indicated by 2.
  • this plate has a die aperture 3 formed by spark erosion.
  • the die plate 2 is accommodated in a die holder 4.
  • This die holder 4 is according to the invention made stepped, so that the plate 2 rests against a step.
  • An antechamber 5 is in this way formed in the die holder 4 to the left of the die plate 2.
  • a supporting tool 6 which supports the die plate 2 in the die holder during extrusion.
  • the heated billet 1 is pressed through the extru­sion aperture 3 in the known manner.
  • the cutting-off now takes place at a distance from the die plate (antechamber depth approx. 30 mm).
  • the die plate in that position the die plate can be given sufficient space on the diameter to bridge the difference in coefficient of expan­sion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)

Abstract

Extrusion die, comprising a body (2) of hard, wear-resistant material in which one or more extrusion apertures are formed by means of spark erosion, the entire body being made of titanium diboride, and die holder (4) which is made internally stepped, so that an antechamber (5) is present in front of the inlet side of the extrusion die.

Description

  • The invention relates to an extrusion die, comprising a body of hard, wear-resistant material in which one or more extrusion apertures are formed by means of spark erosion.
  • Such an extrusion die is known from, for example, GB-A-2,143,448, in which a steel body is used.
  • Although these extrusion dies are very satisfactory for, for example, the extrusion of aluminium sections, their service life is limited, in other words, after a certain extrusion period the apertures are enlarged through wear in such a way that the extruded sections no longer meet the set requirements. For, extrusion takes place at high pressure and high temperature.
  • It is known to fit inserts of ceramic material in a steel die, in which case the extrusion aperture(s) is (are) situated in the insert or in each insert. The contour of the insert then fits precisely into a recess in the die. However, due to the difference in coefficient of expansion, this produces problems in practice.
  • The material H.P. titanium diboride TiB₂, which can be pressed to a body under high pressure and temperature and then has a very high density of at least 98%, is now available on the market.
  • The chemical composition is 31.12% B and 68.88% Ti.
  • The melting point lies at 3390 ± 50 K.
  • Applicants have now found that this very hard and wear-resistant material is very suitable for manufacturing extrusion dies from it through spark erosion. The service life is thereby greatly increased.
  • According to the invention, the entire body is thus made from titanium diboride.
  • The use of a die body of titanium diboride requires a special die holder, which is characterized in that it is made internally stepped, so that an antechamber is present in front of the inlet side of the extru­sion die.
  • In the schematic drawing the block of aluminium, called a billet, is indicated by 1. The die plate of titanium diboride is indicated by 2. In the example this plate has a die aperture 3 formed by spark erosion.
  • The die plate 2 is accommodated in a die holder 4.
  • This die holder 4 is according to the invention made stepped, so that the plate 2 rests against a step.
  • An antechamber 5 is in this way formed in the die holder 4 to the left of the die plate 2.
  • Situated to the right of the die plate 2 is a supporting tool 6 which supports the die plate 2 in the die holder during extrusion.
  • During extrusion the heated billet 1 is pressed through the extru­sion aperture 3 in the known manner.
  • On completion of the extrusion process the aluminium still remai­ning in front of the antechamber 5 must be cut off.
  • The cutting-off now takes place at a distance from the die plate (antechamber depth approx. 30 mm).
  • Besides, in that position the die plate can be given sufficient space on the diameter to bridge the difference in coefficient of expan­sion.

Claims (2)

1.Extrusion die, comprising a body of hard, wear-resistant mate­rial in which one or more extrusion apertures are formed by means of spark erosion, characterized in that the entire body is made of titanium diboride.
2.Die holder for the extrusion die according to Claim 1, charac­terized in that the die holder is made internally stepped, so that an antechamber is present in front of the inlet side.
EP90201681A 1989-06-26 1990-06-25 Extrusion die and holder therefor Withdrawn EP0405685A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8901610 1989-06-26
NL8901610A NL8901610A (en) 1989-06-26 1989-06-26 EXTRUSION DIE AND HOLDER THEREFOR.

Publications (1)

Publication Number Publication Date
EP0405685A1 true EP0405685A1 (en) 1991-01-02

Family

ID=19854906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90201681A Withdrawn EP0405685A1 (en) 1989-06-26 1990-06-25 Extrusion die and holder therefor

Country Status (2)

Country Link
EP (1) EP0405685A1 (en)
NL (1) NL8901610A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004291A1 (en) * 1992-08-25 1994-03-03 Cook, Evelyn, Grace, Joy Improvements in and relating to dies for extruding aluminium
SG162611A1 (en) * 2001-09-24 2010-07-29 Advanced Materials Tech Method to form multi-material components

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR598861A (en) * 1925-05-27 1925-12-28 Cascade die for metal spinning
US2894623A (en) * 1956-03-09 1959-07-14 Dow Chemical Co Extrusion apparatus
FR1318933A (en) * 1962-03-13 1963-02-22 Smith Corp A O Metal extrusion die
FR2078045A5 (en) * 1970-02-03 1971-11-05 Plansee Metallwerk
NL7603342A (en) * 1975-05-14 1976-11-16 Krupp Gmbh STRETCH PRESS TOOL.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR598861A (en) * 1925-05-27 1925-12-28 Cascade die for metal spinning
US2894623A (en) * 1956-03-09 1959-07-14 Dow Chemical Co Extrusion apparatus
FR1318933A (en) * 1962-03-13 1963-02-22 Smith Corp A O Metal extrusion die
FR2078045A5 (en) * 1970-02-03 1971-11-05 Plansee Metallwerk
NL7603342A (en) * 1975-05-14 1976-11-16 Krupp Gmbh STRETCH PRESS TOOL.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THE TOOL & MANUFACTURING ENGINEER., vol. 54, no. 3, March 1965, pages 73-74, Milwaukee, US; J.G. HUNT: "Ceramic dies for hot extrusion" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004291A1 (en) * 1992-08-25 1994-03-03 Cook, Evelyn, Grace, Joy Improvements in and relating to dies for extruding aluminium
GB2283930A (en) * 1992-08-25 1995-05-24 Michael William Cook Improvements in and relating to dies for extruding aluminium
GB2283930B (en) * 1992-08-25 1995-11-08 Michael William Cook Improvements in and relating to dies for extruding aluminium
SG162611A1 (en) * 2001-09-24 2010-07-29 Advanced Materials Tech Method to form multi-material components

Also Published As

Publication number Publication date
NL8901610A (en) 1991-01-16

Similar Documents

Publication Publication Date Title
GB2222543B (en) A method of bonding a tool material to a holder and tools made by the method
EP0759347A1 (en) Method of manufacturing extrusion die for extruding honeycomb structural body
EP0073101B1 (en) Friction-actuated extrusion
US4707904A (en) Method of manufacturing a die for extruding honeycomb body
EP0405685A1 (en) Extrusion die and holder therefor
JP3657880B2 (en) Compact electrode for discharge surface treatment
EP0276083A2 (en) Extrusion die
US5407499A (en) Making a mold for continuous casting
CA1274755A (en) Making a mold for continuous casting
NO156928B (en) PROCEDURE FOR MANUFACTURING A SHOE WITH METAL SURFACE FOR A TEMPLE MAKING MACHINE.
US1950354A (en) Improved pressure molding method
KR930004991B1 (en) Method of manufacturing a drawing die
GB2092930A (en) Metalworking tool with insert
EP0360608A1 (en) Ion extraction grids
US3753880A (en) Method of producing a tool for the non-cutting working of materials
GB1584920A (en) Method of forming tooling for metal sheet
SU869968A1 (en) Method of producing cutting tools
SU1007840A2 (en) Method of securing cutting element of super hard material
JPH01241302A (en) Manufacture of titanium wire for electrode
SU1065072A1 (en) Method of producing cutting tools
SU556923A1 (en) A method of manufacturing an electrode tool for electrical erosion firmware
SU946773A2 (en) Tool assembly
US3657803A (en) Method of making beryllium-aluminum-magnesium-silicon wrought material
SU1268267A2 (en) Method of producing holes with chamfers in plate billets
SU1581491A1 (en) Method of producing hard-alloy dies

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19901121

17Q First examination report despatched

Effective date: 19920602

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19921215