EP0357378A2 - Herstellung von Zwei-Komponenten-Produkten - Google Patents
Herstellung von Zwei-Komponenten-Produkten Download PDFInfo
- 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
Links
Images
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)
- Powder Metallurgy (AREA)
- Producing Shaped Articles From Materials (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Compositions Of Oxide Ceramics (AREA)
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 (de) | 1990-03-07 |
EP0357378A3 EP0357378A3 (de) | 1991-07-24 |
EP0357378B1 EP0357378B1 (de) | 1993-12-15 |
Family
ID=25579396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89308729A Expired - Lifetime EP0357378B1 (de) | 1988-08-31 | 1989-08-30 | Herstellung von Zwei-Komponenten-Produkten |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0357378B1 (de) |
JP (1) | JPH02212348A (de) |
AT (1) | ATE98543T1 (de) |
AU (1) | AU605994B2 (de) |
DE (1) | DE68911430T2 (de) |
ES (1) | ES2047124T3 (de) |
IE (1) | IE63226B1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0246438A2 (de) * | 1986-05-15 | 1987-11-25 | AlliedSignal Inc. | Wässerige Zusammensetzungen zum Spritzgiessen bestehend aus einem gelbildendem Material und aus keramischen und/oder metallischen Pulvern |
US4764434A (en) * | 1987-06-26 | 1988-08-16 | Sandvik Aktiebolag | Diamond tools for rock drilling and machining |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL55719A0 (en) * | 1977-10-21 | 1978-12-17 | Gen Electric | Polycrystalline daimond bady/silicon carbide or silicon nitride substrate composite and process for preparing it |
US4124401A (en) * | 1977-10-21 | 1978-11-07 | General Electric Company | Polycrystalline diamond body |
-
1989
- 1989-08-25 AU AU40813/89A patent/AU605994B2/en not_active Ceased
- 1989-08-30 IE IE278789A patent/IE63226B1/en not_active IP Right Cessation
- 1989-08-30 EP EP89308729A patent/EP0357378B1/de not_active Expired - Lifetime
- 1989-08-30 DE DE89308729T patent/DE68911430T2/de not_active Expired - Fee Related
- 1989-08-30 ES ES89308729T patent/ES2047124T3/es not_active Expired - Lifetime
- 1989-08-30 AT AT89308729T patent/ATE98543T1/de not_active IP Right Cessation
- 1989-08-31 JP JP1226349A patent/JPH02212348A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0246438A2 (de) * | 1986-05-15 | 1987-11-25 | AlliedSignal Inc. | Wässerige Zusammensetzungen zum Spritzgiessen bestehend aus einem gelbildendem Material und aus keramischen und/oder metallischen Pulvern |
US4764434A (en) * | 1987-06-26 | 1988-08-16 | Sandvik Aktiebolag | Diamond tools for rock drilling and machining |
Also Published As
Publication number | Publication date |
---|---|
EP0357378B1 (de) | 1993-12-15 |
EP0357378A3 (de) | 1991-07-24 |
ES2047124T3 (es) | 1994-02-16 |
JPH02212348A (ja) | 1990-08-23 |
ATE98543T1 (de) | 1994-01-15 |
DE68911430D1 (de) | 1994-01-27 |
AU605994B2 (en) | 1991-01-24 |
IE892787L (en) | 1990-02-28 |
AU4081389A (en) | 1990-03-08 |
IE63226B1 (en) | 1995-04-05 |
DE68911430T2 (de) | 1994-04-07 |
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