WO2002043942A1 - Injection mould having a porous surface and method of using it - Google Patents

Injection mould having a porous surface and method of using it Download PDF

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Publication number
WO2002043942A1
WO2002043942A1 PCT/GB2001/005139 GB0105139W WO0243942A1 WO 2002043942 A1 WO2002043942 A1 WO 2002043942A1 GB 0105139 W GB0105139 W GB 0105139W WO 0243942 A1 WO0243942 A1 WO 0243942A1
Authority
WO
WIPO (PCT)
Prior art keywords
porous
mould
porous material
coating
component
Prior art date
Application number
PCT/GB2001/005139
Other languages
French (fr)
Inventor
John Liddle
Jolyon Oliver Rawson
Original Assignee
Ceram Research Limited
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 Ceram Research Limited filed Critical Ceram Research Limited
Priority to AU2002223857A priority Critical patent/AU2002223857A1/en
Publication of WO2002043942A1 publication Critical patent/WO2002043942A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/007—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/344—Moulds, cores, or mandrels of special material, e.g. destructible materials from absorbent or liquid- or gas-permeable materials, e.g. plaster moulds in general
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3814—Porous moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • This invention concerns injection moulding apparatus, particularly but not exclusively powder injection moulding apparatus, and especially such apparatus usable for moulding ceramic items.
  • the invention also provides a method of injection moulding, particularly but not exclusively powder injection moulding, and especially a method of moulding ceramic items.
  • Injection moulding is a forming technique used extensively in the plastics industry.
  • molten plastic is forced through an orifice into an otherwise sealed mould cavity. It is common for the cavity to be made of metal, typically tool steel. Heat flows from the plastic into the cavity until the plastic cools and sets. The piece, which is now rigid can be ejected from the cavity.
  • Injection moulding is an attractive forming technique for other materials because of its speed, low labour content, ability to make complex shapes in one process, and ability to be automated. Variants of the technique, which are generically known as Powder Injection Moulding (PIM), have been developed for metals, ceramics and other particulate materials.
  • PIM Powder Injection Moulding
  • thermoplastic binders filled with a particulate, which can be formed in a similar way to plastic materials.
  • many of these systems have the disadvantage that after forming, the pieces must have the thermoplastic binder removed to enable the particulate to be sintered by the action of heat.
  • the binder removal process can be slow and complex and lead to high production losses.
  • thermoplastic polymer binders To overcome some of the problems associated with the removal of thermoplastic polymer binders, several systems have been developed which use solvent, typically water-soluble binders. These binder systems have the advantage that once the pieces have been dried, to remove the solvent, the remaining binder components can be removed with less disruption to the structure of the shaped particulate component. In addition some of these binder systems are attractive because of their lower relative cost per item.
  • injection moulding apparatus comprising a mould having a mould cavity, with at least part of the material forming the moulding surface of the mould cavity being porous.
  • the porous material is preferably air permeable.
  • the mould surface is formed by porous material.
  • the remainder of the mould surface is preferably partially or wholly formed of metal, and desirably steel.
  • the porous material preferably comprises a plastics material, a porous metal, or a porous composite material.
  • the porous material may comprise a porous epoxy resin aluminium composite, or a sintered metal such as stainless steel or bronze.
  • the pore size of the porous material is preferably such that material being moulded does not substantially enter the pores, and the pore size may be less than 25 micrometers.
  • Means may be provided to permit a fluid to pass through the porous mould surface to aid release of a moulded item.
  • the porous material may be in the form of a coating on at least part of the inner face of the moulding surface.
  • the coating may comprise epoxy porous aluminium or a porous metal.
  • the coating may be provided on a steel substrate and could be machined to a correct profile. Alternatively, the coating could be apphed by spraying and desirably plasma spraying.
  • the invention also provides powder injection moulding apparatus for producing items of ceramic hollow ware, the apparatus being according to any of the preceding seven paragraphs.
  • the apparatus preferably comprises a mould formed of a number of components including a component defining the base of the mould cavity which component is not made of porous material, and a component or components defining the side of the mould cavity at least part of which component or components is made of a porous material.
  • the mould preferably also comprises a component defining the inner core of the mould cavity, which component may be made of porous material.
  • the mould may also comprise a component defining the lower end of the inner core of the mould cavity, which component may be made of non-porous material.
  • the mould may also comprise an ejector ring, which is desirably not made of porous material.
  • the invention also provides a method of injection moulding using apparatus according to any of the preceding nine paragraphs.
  • the invention yet further provides a method of powder injection moulding using apparatus according to any of said preceding nine paragraphs.
  • the material being moulded preferably comprises a binder which is solvent based, and preferably water based.
  • the binder may comprise any of PVA; cellulose derivatives such as methyl cellulose; polysaccharides such as agaroids; starches; or combinations of any of these materials, perhaps with other materials.
  • the material being moulded may be any of: ceramics and particularly any bone china, structural ceramics or functional ceramics; steel; ferrous or non- ferrous alloys; cermets; powder and fibre reinforced composites; powder phenolic resins; or foodstuffs.
  • a fluid may be passed through the porous mould surface following moulding to aid release of a moulded item, and the fluid may comprise a mould release agent. Alternatively air may be blown through the porous mould surface.
  • the drawing shows powder injection moulding apparatus 10 suitable for producing ceramic cups made for example from bone china.
  • the apparatus 10 defines an appropriate shaped mould cavity 12.
  • the mould cavity 12 is defined by the following six parts.
  • a base 14 made of tool steel.
  • Two side cheeks 16 are provided made of a porous epoxy resin/aluminium composite such as Metapor HD100AL available from Portec AG of Switzerland. This has a permeability index of 56 as measured by the manufacturer.
  • the mould cavity 12 is also defined by an ejector ring 18 made of tool steel.
  • a core 20 of the above porous/permeable material is provided with a non-porous core end 22 also made of tool steel.
  • the apparatus 10 is usable as follows.
  • the powdered bone china is produced by a conventional technique and mixed with a PVA/cellulose/water binder system. This is injected into the apparatus 10 at a temperature of 85°C to 90°C with the apparatus at a temperature of 8°C to 10°C, and moulded for forty seconds.
  • the resultant shaped piece is handleable but not as rigid as could be produced for example using a thermoplastics binder route.
  • the components of the mould cavity made of the above porous/permeable material enable release therefrom without damage to the delicate parts such as the side walls 24 and handle 26.
  • the invention could be used with a wide range of other materials such as other ceramics and particularly structural ceramics or functional ceramics; steel; ferrous and non-ferrous alloys; cermets; powder and fibre reinforced composites; powdered phenolic resins; soap; or foodstuffs, and particularly items such as beef burgers and the like which require shaping.
  • the invention can also be usable in other types of injection moulding.
  • the invention is usable with other aqueous binders such as cellulose derivatives and especially methyl cellulose; polysaccharides and especially agaroids; and starches.
  • the invention could also be used with non-aqueous binders.
  • Other porous/permeable materials could be used such as other similar composites; sintered metals such as stainless steel or bonze; or other porous materials such as porous plastics materials.
  • the selection of material is dependent on the ability to form, for instance by machining or casting, or the pore size. In general this has found to be preferable below 25 micrometers for bone china, but the pore size may differ dependent on the particle size of material being moulded and/or the moulding pressure.
  • the choice of material also depends on permeability, abrasion resistance, heat transfer and mechanical stability.
  • a coating of porous/permeable material could be provided on an otherwise non-porous material.
  • a solid block of tool steel could be rough machined to give an oversized cavity.
  • a coating of for example epoxy porous aluminium could be apphed, cured and subsequently machined to a correct profile.
  • An alternative would be to provide a thin porous coating of for instance porous metal, and this could be apphed to a steel substrate by spraying and particularly plasma spraying.
  • a fluid such as a mould release agent may be passed through the porous part of the mould to aid release of the moulded item.
  • air may be blown through the mould to aid release.
  • the operating temperatures outlined above may be varied.
  • the material could be injected at a temperature within the range 50°C to 110°C, and the apparatus may be at a temperature of between 5°C and 30°C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Powder Metallurgy (AREA)

Abstract

Injection moulding apparatus (10), the apparatus defining an appropriately shaped mould cavity (12). The mould cavity (12) comprises a base (14) which is made of a non-porous material, two side components (16) made of a porous material, a core (20) of porous material with a non-porous core end (22). The apparatus (10) may be used for powder injection moulding.

Description

INJECTION MOULD HAVING A POROUS SURFACE AND METHOD OF USING IT
This invention concerns injection moulding apparatus, particularly but not exclusively powder injection moulding apparatus, and especially such apparatus usable for moulding ceramic items. The invention also provides a method of injection moulding, particularly but not exclusively powder injection moulding, and especially a method of moulding ceramic items.
Injection moulding is a forming technique used extensively in the plastics industry. In the basic form of this technique, molten plastic is forced through an orifice into an otherwise sealed mould cavity. It is common for the cavity to be made of metal, typically tool steel. Heat flows from the plastic into the cavity until the plastic cools and sets. The piece, which is now rigid can be ejected from the cavity.
Injection moulding is an attractive forming technique for other materials because of its speed, low labour content, ability to make complex shapes in one process, and ability to be automated. Variants of the technique, which are generically known as Powder Injection Moulding (PIM), have been developed for metals, ceramics and other particulate materials.
In general the PIM techniques use thermoplastic binders, filled with a particulate, which can be formed in a similar way to plastic materials. However many of these systems have the disadvantage that after forming, the pieces must have the thermoplastic binder removed to enable the particulate to be sintered by the action of heat. The binder removal process can be slow and complex and lead to high production losses.
To overcome some of the problems associated with the removal of thermoplastic polymer binders, several systems have been developed which use solvent, typically water-soluble binders. These binder systems have the advantage that once the pieces have been dried, to remove the solvent, the remaining binder components can be removed with less disruption to the structure of the shaped particulate component. In addition some of these binder systems are attractive because of their lower relative cost per item.
One less favourable feature of these solvent based systems is that it is difficult to achieve the same degree of resistance to deformation that is achieved with thermoplastic polymer binders. When trying to eject the piece from the mould, distortion may occur because of the forces acting on the piece. Specifically, distortion can result from the suction forces applied by the tool surfaces.
According to the present invention there is provided injection moulding apparatus, the apparatus comprising a mould having a mould cavity, with at least part of the material forming the moulding surface of the mould cavity being porous.
The porous material is preferably air permeable.
Preferably only part of the mould surface is formed by porous material. The remainder of the mould surface is preferably partially or wholly formed of metal, and desirably steel.
The porous material preferably comprises a plastics material, a porous metal, or a porous composite material. The porous material may comprise a porous epoxy resin aluminium composite, or a sintered metal such as stainless steel or bronze.
The pore size of the porous material is preferably such that material being moulded does not substantially enter the pores, and the pore size may be less than 25 micrometers.
Means may be provided to permit a fluid to pass through the porous mould surface to aid release of a moulded item.
In an alternative arrangement the porous material may be in the form of a coating on at least part of the inner face of the moulding surface. The coating may comprise epoxy porous aluminium or a porous metal. The coating may be provided on a steel substrate and could be machined to a correct profile. Alternatively, the coating could be apphed by spraying and desirably plasma spraying.
The invention also provides powder injection moulding apparatus for producing items of ceramic hollow ware, the apparatus being according to any of the preceding seven paragraphs.
The apparatus preferably comprises a mould formed of a number of components including a component defining the base of the mould cavity which component is not made of porous material, and a component or components defining the side of the mould cavity at least part of which component or components is made of a porous material.
The mould preferably also comprises a component defining the inner core of the mould cavity, which component may be made of porous material. The mould may also comprise a component defining the lower end of the inner core of the mould cavity, which component may be made of non-porous material. The mould may also comprise an ejector ring, which is desirably not made of porous material.
The invention also provides a method of injection moulding using apparatus according to any of the preceding nine paragraphs.
The invention yet further provides a method of powder injection moulding using apparatus according to any of said preceding nine paragraphs.
The material being moulded preferably comprises a binder which is solvent based, and preferably water based. The binder may comprise any of PVA; cellulose derivatives such as methyl cellulose; polysaccharides such as agaroids; starches; or combinations of any of these materials, perhaps with other materials. The material being moulded may be any of: ceramics and particularly any bone china, structural ceramics or functional ceramics; steel; ferrous or non- ferrous alloys; cermets; powder and fibre reinforced composites; powder phenolic resins; or foodstuffs.
A fluid may be passed through the porous mould surface following moulding to aid release of a moulded item, and the fluid may comprise a mould release agent. Alternatively air may be blown through the porous mould surface.
An embodiment of the present invention will now be described by way of example only and with reference to the accompanying drawing which is a diagrammatic cross sectional view through moulding apparatus according to the invention.
The drawing shows powder injection moulding apparatus 10 suitable for producing ceramic cups made for example from bone china. The apparatus 10 defines an appropriate shaped mould cavity 12. The mould cavity 12 is defined by the following six parts. A base 14 made of tool steel. Two side cheeks 16 are provided made of a porous epoxy resin/aluminium composite such as Metapor HD100AL available from Portec AG of Switzerland. This has a permeability index of 56 as measured by the manufacturer.
The mould cavity 12 is also defined by an ejector ring 18 made of tool steel. A core 20 of the above porous/permeable material is provided with a non-porous core end 22 also made of tool steel.
The apparatus 10 is usable as follows. The powdered bone china is produced by a conventional technique and mixed with a PVA/cellulose/water binder system. This is injected into the apparatus 10 at a temperature of 85°C to 90°C with the apparatus at a temperature of 8°C to 10°C, and moulded for forty seconds. The resultant shaped piece is handleable but not as rigid as could be produced for example using a thermoplastics binder route. The components of the mould cavity made of the above porous/permeable material enable release therefrom without damage to the delicate parts such as the side walls 24 and handle 26.
There is thus described apparatus which permits the above relatively low cost and environmentally friendly binder system to be used which can be driven off using conventional techniques, without the resultant moulded piece being damaged during removal from the mould. The apparatus is of relatively conventional construction and can thus be inexpensively manufactured and formed to meet particular circumstances or requirements.
Various modifications may be made without departing from the scope of the invention. Whilst the above described example relates to powder injection moulding of ceramic materials, the invention could be used with a wide range of other materials such as other ceramics and particularly structural ceramics or functional ceramics; steel; ferrous and non-ferrous alloys; cermets; powder and fibre reinforced composites; powdered phenolic resins; soap; or foodstuffs, and particularly items such as beef burgers and the like which require shaping. The invention can also be usable in other types of injection moulding.
The invention is usable with other aqueous binders such as cellulose derivatives and especially methyl cellulose; polysaccharides and especially agaroids; and starches. The invention could also be used with non-aqueous binders. Other porous/permeable materials could be used such as other similar composites; sintered metals such as stainless steel or bonze; or other porous materials such as porous plastics materials. The selection of material is dependent on the ability to form, for instance by machining or casting, or the pore size. In general this has found to be preferable below 25 micrometers for bone china, but the pore size may differ dependent on the particle size of material being moulded and/or the moulding pressure. The choice of material also depends on permeability, abrasion resistance, heat transfer and mechanical stability.
In an alternative arrangement a coating of porous/permeable material could be provided on an otherwise non-porous material. For instance a solid block of tool steel could be rough machined to give an oversized cavity. A coating of for example epoxy porous aluminium could be apphed, cured and subsequently machined to a correct profile. An alternative would be to provide a thin porous coating of for instance porous metal, and this could be apphed to a steel substrate by spraying and particularly plasma spraying.
A fluid such as a mould release agent may be passed through the porous part of the mould to aid release of the moulded item. Alternatively, air may be blown through the mould to aid release. The operating temperatures outlined above may be varied. For instance, the material could be injected at a temperature within the range 50°C to 110°C, and the apparatus may be at a temperature of between 5°C and 30°C.
Various other modifications may be made without departing from the scope of the invention, and combinations of the above features could be provided.
Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Apphcant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.

Claims

Claims
1. Injection moulding apparatus, the apparatus comprising a mould having a mould cavity, characterised in that at least part of the material forming the moulding surface of the mould cavity is porous.
2. Apparatus according to claim 1, characterised in that the porous material is air permeable.
3. Apparatus according to claims 1 or 2, characterised in that only part of the mould surface is formed by porous material.
4. Apparatus according to claim 3, characterised in that the remainder of the mould surface is partially or wholly formed of metal.
5. Apparatus according to claim 4, characterised in that the metal is steel.
6. - Apparatus according to any of the preceding claims, characterised in that the porous material comprises a plastics material, a porous metal, or a porous composite material.
7. Apparatus according to claim 6, characterised in that the porous material comprises a porous epoxy resin aluminium composite, or a sintered metal.
8. Apparatus according to claim 7, characterised in that the sintered metal is stainless steel or bronze.
9. Apparatus according to any of the preceding claims, characterised in that the pore size of the porous material is such that material being moulded does not substantially enter the pores.
10. Apparatus according to claim 9, characterised in that the pore size is less than 25 micrometers.
11. Apparatus according to any of the preceding claims, characterised in that means are provided to permit a fluid to pass through the porous mould surface to aid release of a moulded item.
12. Apparatus according to any of the preceding claims, characterised in that the porous material is in the form of a coating on at least part of the inner face of the moulding surface.
13. Apparatus according to claim 12, characterised in that the coating comprises epoxy porous aluminium or a porous metal.
14. Apparatus according to claims 12 or 13, characterised in that the coating is provided on a steel substrate.
15. Apparatus according to any of claims 12 to 14, characterised in that the coating is machined to a correct profile.
16. Apparatus according to any of claims 12 to 15, characterised in that the coating is apphed by spraying.
17. Apparatus according to claim 16, characterised in that the coating is apphed by plasma spraying.
18. Powder injection moulding apparatus for producing items of ceramic hollow ware, characterised in that the apparatus is according to any of the preceding claims.
19. Apparatus according to claim 18, characterised in that the mould is formed of a number of components including a component defining the base of the mould cavity which component is not made of porous material, and a component or components defining the side of the mould cavity at least part of which component or components is made of a porous material.
20. Apparatus according to claims 18 or 19, characterised in that the mould comprises a component defining the inner core of the mould cavity.
21. Apparatus according to claim 20, characterised in that the component is made of porous material.
22. Apparatus according to claim 20 or 21, characterised in that the mould comprises a component defining the lower end of the inner core of the mould cavity.
23. Apparatus according to claim 22, characterised in that the component defining the lower end of the inner core is made of non-porous material.
24. Apparatus according to any of the preceding claims, characterised in that the mould comprises an ejector ring.
25. Apparatus according to claim 24, characterised in that the ejector ring is not made of porous material.
26. A method of injection moulding, characterised in that the method uses apparatus according to any of the preceding claims.
27. A method of powder injection moulding, characterised in that the method was apparatus according to any of claims 18 to 25.
28. A method according to claims 26 or 27, characterised in that the material being moulded comprises a binder which is solvent based.
29. A method according to claim 28, characterised in that the binder is water based.
30. A method according to claims 28 or 29, characterised in that the binder comprises any of PVA; cellulose derivatives such as methyl cellulose; polysaccharides such as agaroids; starches; or combinations of any of these materials, perhaps with other materials.
31. A method according to any of claims 26 to 30, characterised in that the material being moulded is any of: ceramics and particularly any bone china, structural ceramics or functional ceramics; steel; ferrous or non-ferrous alloys; cermets; powder and fibre reinforced composites; powder phenolic resins; or foodstuffs.
32. A method according to any of claims 26 to 31, characterised in that a fluid is passed through the porous mould surface following moulding to aid release of a moulded item.
33. A method according to claim 32, characterised in that the fluid comprises a mould release agent.
34. A method according to claim 32, characterised in that air is blown through the porous mould surface.
PCT/GB2001/005139 2000-11-30 2001-11-21 Injection mould having a porous surface and method of using it WO2002043942A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002223857A AU2002223857A1 (en) 2000-11-30 2001-11-21 Injection mould having a porous surface and method of using it

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0029182.3 2000-11-30
GB0029182A GB0029182D0 (en) 2000-11-30 2000-11-30 Injection moulding

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Publication Number Publication Date
WO2002043942A1 true WO2002043942A1 (en) 2002-06-06

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006060233A1 (en) * 2004-12-01 2006-06-08 General Electric Company Porous mold insert and molds and methods using the same
WO2010076012A1 (en) * 2009-01-02 2010-07-08 Boehringer Ingelheim International Gmbh Component and inhaler and method for producing a component
CN107987483A (en) * 2017-12-26 2018-05-04 天津康普斯特科技发展有限公司 A kind of method of the hybrid resin for being used to quickly manufacture injection mold and quick manufacture injection mold
CN113458398A (en) * 2021-06-09 2021-10-01 北京科技大学 Method for realizing metal injection molding by injecting slurry

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JPH0872062A (en) * 1994-09-02 1996-03-19 Konan Tokushu Sangyo Kk Porous electroforming mold
WO1996019308A1 (en) * 1994-12-19 1996-06-27 Aga Aktiebolag Process including heating and cooling for production of an injection-moulded body
WO1998029236A1 (en) * 1996-12-30 1998-07-09 Unilever Plc Die and process for stamping plastic material
US6066274A (en) * 1995-06-28 2000-05-23 Nobel Biocare Ab Method and means for producing a ceramic or metallic product for sintering

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05195279A (en) * 1992-01-24 1993-08-03 Kyokuto Giken:Kk Air penetrative electrocasting mold and its production
JPH0872062A (en) * 1994-09-02 1996-03-19 Konan Tokushu Sangyo Kk Porous electroforming mold
WO1996019308A1 (en) * 1994-12-19 1996-06-27 Aga Aktiebolag Process including heating and cooling for production of an injection-moulded body
US6066274A (en) * 1995-06-28 2000-05-23 Nobel Biocare Ab Method and means for producing a ceramic or metallic product for sintering
WO1998029236A1 (en) * 1996-12-30 1998-07-09 Unilever Plc Die and process for stamping plastic material

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Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 632 (C - 1132) 24 November 1993 (1993-11-24) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006060233A1 (en) * 2004-12-01 2006-06-08 General Electric Company Porous mold insert and molds and methods using the same
US7473086B2 (en) 2004-12-01 2009-01-06 General Electric Company Porous mold insert and molds
WO2010076012A1 (en) * 2009-01-02 2010-07-08 Boehringer Ingelheim International Gmbh Component and inhaler and method for producing a component
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