WO1998024573A1 - Moule tel qu'un moule de coulee sous pression - Google Patents

Moule tel qu'un moule de coulee sous pression Download PDF

Info

Publication number
WO1998024573A1
WO1998024573A1 PCT/GB1997/003141 GB9703141W WO9824573A1 WO 1998024573 A1 WO1998024573 A1 WO 1998024573A1 GB 9703141 W GB9703141 W GB 9703141W WO 9824573 A1 WO9824573 A1 WO 9824573A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
fluid
mould according
heat exchange
die casting
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.)
Ceased
Application number
PCT/GB1997/003141
Other languages
English (en)
Inventor
Robert Myers Sinclair Barr
Mark Alfred STALEY
Mark Dalling
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.)
Dynacast Ltd Great Britain
Original Assignee
Dynacast Ltd Great Britain
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 Dynacast Ltd Great Britain filed Critical Dynacast Ltd Great Britain
Priority to AU49590/97A priority Critical patent/AU4959097A/en
Publication of WO1998024573A1 publication Critical patent/WO1998024573A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • 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
    • B22D17/2209—Selection of die materials
    • 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
    • B22D17/2218—Cooling or heating equipment for dies

Definitions

  • This invention relates to die casting and like moulds.
  • Such moulds are made from tool steel, which is expensive, and expensive also to fashion to the desired cavity shape. It is desired to maximise productivity from such an expensive item, and the present invention provides a way of at least substantially improving productivity.
  • the invention comprises a die casting or like mould having an erosion- resistant mould surface on a mould body adapted for rapid cooling of the mould surface.
  • the tool steel used for its hardness and wear resistance required to withstand erosion from the molten metal has a relatively low thermal conductivity compared with certain other metals.
  • the mould body may comprise a material of good conductivity, such as copper or a copper alloy, and may be formed by powder metallurgy, or other means.
  • Forced cooling may be provided for by incorporating fluid heat exchange means.
  • the mould body may have ducting for fluid heat exchange medium.
  • the mould may be designed to operate at a given moulding temperature and have a chamber containing a heat exchange fluid, the chamber wall being arranged so that at mould operating temperature at least a part of the chamber wall reaches the temperature required to promote nucleate boiling of the heat exchange fluid. Nucleate boiling of the heat exchange fluid will substantially increase the rate of heat transfer from the mould to the fluid.
  • the said part of the chamber wall may lie on or close to an isotherm within the mould under operating conditions for substantially evenly distributed heat transfer and hence cooling effect.
  • Cooling channels for flowing heat exchange medium may be drilled into the body of the mould; more complicated shapes as may be desired for approximating to an isotherm can be incorporated as by machining or by building up the mould body from strata, or, perhaps most readily, by forming the mould body using powder metallurgy. Powder metallurgy would also allow cooling circuits to be incorporated via the inclusion of pre- formed tubing.
  • Figure 1 is a cross-section though a first mould
  • Figure 2 is a cross-section through a second mould.
  • the drawings illustrate die casting moulds 11 having an erosion resistant mould surface 12 in the mould cavity 13 - this can be made from tool steel, maraging steel, or a combination of materials which would optimise erosion resistance and thermal conductivity properties.
  • the moulds 11 however have a mould body 14 adapted for rapid cooling of the mould surface 12.
  • One way in which rapid cooling is facilitated is to make the mould body 14 of a material having good thermal conductivity such as copper or a copper alloy.
  • a material having good thermal conductivity such as copper or a copper alloy.
  • the body material should also have a high enough melting point that it will remain solid at the maximum interface temperature.
  • the moulds may be produced in any convenient manner.
  • the mould could be fashioned from a copper alloy and a tool steel coating applied.
  • the mould could be made by powder metallurgical techniques or built up from strata of different materials which may then be bonded together, for example by hot isostatic pressing.
  • the mould 11 in each embodiment incorporates fluid heat exchange means 15.
  • drilled coolant fluid ducting 16 is provided for connection to a coolant fluid - e.g. water-flow, which might be allowed to run to waste or to be recirculated after cooling.
  • a coolant fluid e.g. water-flow
  • Figure 1 also illustrates the incorporation of a pre-formed cooling tube 41 as could be incorporated in a mould made via powder metallurgy.
  • Figure 2 illustrates a coolant fluid containing chamber 21 the surface of which proximate the mould cavity 13 lies on or close to a calculated isotherm, again so as to produce even heat transfer and hence cooling at the mould surface.
  • the chamber wall 22 can be arranged to lie so close to the mould surface that the wall 22 temperature rises sufficiently high to promote nucleate boiling of the fluid in the chamber, thus providing cooling over and above straight forward convective cooling.
  • a chamber is probably most easily fashioned using powder metallurgy mould construction techniques, though assembly from strata could also serve.
  • a heat pipe 31 may be used to supplement the cooling arrangement, especially where as shown in Figure 2, a coolant fluid flow would be ineffective e.g. through flow stagnation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un moule, tel qu'un moule de coulée sous pression, possédant une surface résistante à l'érosion sur un corps de moule conçu pour un refroidissement rapide de la surface du moule.
PCT/GB1997/003141 1996-12-05 1997-11-14 Moule tel qu'un moule de coulee sous pression Ceased WO1998024573A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49590/97A AU4959097A (en) 1996-12-05 1997-11-14 Die casting and like moulds

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9625312.5 1996-12-05
GBGB9625312.5A GB9625312D0 (en) 1996-12-05 1996-12-05 Die casting and like moulds

Publications (1)

Publication Number Publication Date
WO1998024573A1 true WO1998024573A1 (fr) 1998-06-11

Family

ID=10804003

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/003141 Ceased WO1998024573A1 (fr) 1996-12-05 1997-11-14 Moule tel qu'un moule de coulee sous pression

Country Status (3)

Country Link
AU (1) AU4959097A (fr)
GB (1) GB9625312D0 (fr)
WO (1) WO1998024573A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1502676A1 (fr) * 2003-07-31 2005-02-02 Renault s.a.s. Noyau de fonderie à base de borates de potassium comportant une cavité de dissolution.
EP2465624A1 (fr) * 2010-12-20 2012-06-20 Kienle + Spiess GmbH Procédé de fabrication de produits comprenant du cuivre ou des alliages de cuivre pour applications électriques
US11975462B2 (en) 2017-02-16 2024-05-07 Billio Pty Ltd Cooling system for moulds

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170587B (de) * 1956-08-08 1964-05-21 Renault Formueberzug fuer Dauerformen
DE2756492A1 (de) * 1977-12-19 1979-06-21 Robert Martin Bonesteel Giessform und waermebehandlungsverfahren zur herstellung einer solchen form
GB2063128A (en) * 1977-12-01 1981-06-03 Dbm Industries Ltd Apparatus for controlling temperature of mold halves in a die casting machine
US4589930A (en) * 1983-03-02 1986-05-20 Hitachi, Ltd. Casting metal mold and method of producing the same
JPS62101363A (ja) * 1985-10-25 1987-05-11 Fuso Light Alloys Co Ltd 金型の温度制御方法並びに温度制御装置
JPS63157751A (ja) * 1986-12-22 1988-06-30 Toyota Motor Corp 型温コントロ−ル方法
EP0711615A1 (fr) * 1994-11-09 1996-05-15 Gerhard Dr. Betz Moule permanent pour la coulée des métaux des matières en plastique et des verres

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170587B (de) * 1956-08-08 1964-05-21 Renault Formueberzug fuer Dauerformen
GB2063128A (en) * 1977-12-01 1981-06-03 Dbm Industries Ltd Apparatus for controlling temperature of mold halves in a die casting machine
DE2756492A1 (de) * 1977-12-19 1979-06-21 Robert Martin Bonesteel Giessform und waermebehandlungsverfahren zur herstellung einer solchen form
US4589930A (en) * 1983-03-02 1986-05-20 Hitachi, Ltd. Casting metal mold and method of producing the same
JPS62101363A (ja) * 1985-10-25 1987-05-11 Fuso Light Alloys Co Ltd 金型の温度制御方法並びに温度制御装置
JPS63157751A (ja) * 1986-12-22 1988-06-30 Toyota Motor Corp 型温コントロ−ル方法
EP0711615A1 (fr) * 1994-11-09 1996-05-15 Gerhard Dr. Betz Moule permanent pour la coulée des métaux des matières en plastique et des verres

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 318 (M - 632) 16 October 1987 (1987-10-16) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 419 (M - 760) 8 November 1988 (1988-11-08) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1502676A1 (fr) * 2003-07-31 2005-02-02 Renault s.a.s. Noyau de fonderie à base de borates de potassium comportant une cavité de dissolution.
FR2858256A1 (fr) * 2003-07-31 2005-02-04 Renault Sa Noyau de fonderie a base de borates de potassium comportant une cavite de dissolution
EP2465624A1 (fr) * 2010-12-20 2012-06-20 Kienle + Spiess GmbH Procédé de fabrication de produits comprenant du cuivre ou des alliages de cuivre pour applications électriques
US11975462B2 (en) 2017-02-16 2024-05-07 Billio Pty Ltd Cooling system for moulds

Also Published As

Publication number Publication date
AU4959097A (en) 1998-06-29
GB9625312D0 (en) 1997-01-22

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