EP0357378A2 - Fabrication de produits bi-composants - Google Patents

Fabrication de produits bi-composants Download PDF

Info

Publication number
EP0357378A2
EP0357378A2 EP89308729A EP89308729A EP0357378A2 EP 0357378 A2 EP0357378 A2 EP 0357378A2 EP 89308729 A EP89308729 A EP 89308729A EP 89308729 A EP89308729 A EP 89308729A EP 0357378 A2 EP0357378 A2 EP 0357378A2
Authority
EP
European Patent Office
Prior art keywords
green state
slurry
product
binder
state mass
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.)
Granted
Application number
EP89308729A
Other languages
German (de)
English (en)
Other versions
EP0357378B1 (fr
EP0357378A3 (fr
Inventor
Richard Patrick Burnand
Raymond Albert Chapman
Trevor John Martell
Stephen Anthony Parsons
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.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
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 De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Priority to AT89308729T priority Critical patent/ATE98543T1/de
Publication of EP0357378A2 publication Critical patent/EP0357378A2/fr
Publication of EP0357378A3 publication Critical patent/EP0357378A3/fr
Application granted granted Critical
Publication of EP0357378B1 publication Critical patent/EP0357378B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses

Definitions

  • This invention relates to the manufacture of abrasive products.
  • Composite abrasive compacts are generally produced by placing the components, in powdered form, necessary to form an abrasive compact on a cemented carbide substrate. This unbonded assembly is placed in a reaction capsule which is then placed in the reaction zone of a conventional high pressure/high temperature apparatus. The contents of the reaction capsule are subjected to conditions of elevated temperature and pressure at which the abrasive particles are crystallographically stable.
  • the liquid medium is preferably water containing a suitable binder dissolved or dispersed therein, the binder being capable of forming a gel on application of heat.
  • binders should decompose or volatilise at a temperature of about 350°C or lower.
  • examples of such binders are organic binders such as cellulose ethers or esters.
  • An example of a particularly suitable binder is methyl cellulose. Methyl cellulose forms a gel at a temperature of between 50 and 100°C.
  • the water and binder must be removed prior to the application of the elevated temperature and pressure conditions. This removal may be achieved by heating. Preferably the heating takes place in two stages. In the first stage, the water is removed by heating the green state mass or masses to a temperature above 100°C. Thereafter, the binder may be volatilised or decomposed by heating the green state mass or masses to the appropriate temperature to cause this to happen.
  • a first slurry is made consisting of a mass of carbide and cobalt powders suspended in water which contains methyl cellulose dissolved therein.
  • This slurry 20 is poured into the mould to fill the sleeve 10, as illustrated by Figure 2.
  • the slurry 20 is heated to a temperature of between 50°C and 100°C to cause the methyl cellulose to gel producing a green state mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Powder Metallurgy (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP89308729A 1988-08-31 1989-08-30 Fabrication de produits bi-composants Expired - Lifetime EP0357378B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89308729T ATE98543T1 (de) 1988-08-31 1989-08-30 Herstellung von zwei-komponenten-produkten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA886475 1988-08-31
ZA886475 1988-08-31

Publications (3)

Publication Number Publication Date
EP0357378A2 true EP0357378A2 (fr) 1990-03-07
EP0357378A3 EP0357378A3 (fr) 1991-07-24
EP0357378B1 EP0357378B1 (fr) 1993-12-15

Family

ID=25579396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89308729A Expired - Lifetime EP0357378B1 (fr) 1988-08-31 1989-08-30 Fabrication de produits bi-composants

Country Status (7)

Country Link
EP (1) EP0357378B1 (fr)
JP (1) JPH02212348A (fr)
AT (1) ATE98543T1 (fr)
AU (1) AU605994B2 (fr)
DE (1) DE68911430T2 (fr)
ES (1) ES2047124T3 (fr)
IE (1) IE63226B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001278672A (ja) * 2000-03-31 2001-10-10 Japan Fine Ceramics Center セラミックス材料及びその製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124401A (en) * 1977-10-21 1978-11-07 General Electric Company Polycrystalline diamond body
GB2006733B (en) * 1977-10-21 1982-10-20 Gen Electric Polycrystalline diamond body/silicon carbide or silicon nitride substrate composite
US4734237A (en) * 1986-05-15 1988-03-29 Allied Corporation Process for injection molding ceramic composition employing an agaroid gell-forming material to add green strength to a preform
US4764434A (en) * 1987-06-26 1988-08-16 Sandvik Aktiebolag Diamond tools for rock drilling and machining

Also Published As

Publication number Publication date
IE892787L (en) 1990-02-28
IE63226B1 (en) 1995-04-05
EP0357378B1 (fr) 1993-12-15
ATE98543T1 (de) 1994-01-15
AU605994B2 (en) 1991-01-24
EP0357378A3 (fr) 1991-07-24
AU4081389A (en) 1990-03-08
DE68911430D1 (de) 1994-01-27
ES2047124T3 (es) 1994-02-16
JPH02212348A (ja) 1990-08-23
DE68911430T2 (de) 1994-04-07

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