Stick of composite materials and process for preparation thereof
US4880707A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Aug 10, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12146
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A stick of composite materials comprises a hot-pressed super-hard head member containing higher than 50 vol % of a diamond powder and/or a high pressure boron nitride powder, and a supporting member which is bonded at one of its ends with the hot-pressed super-hard head member. The stick of composite materials is characterized in that: PA0 the bonding between the head member and the supporting member is formed during the hot press process of the head member; PA0 the stick is of an elongated form, preferably of a cylindrical form of which the sectional diameter or equivalent sectional diameter is not larger than 3 mm; PA0 the length of the head member is 0.3 to 2.0 mm in the axial direction of the stick; and that PA0 the supporting member is more than five times longer in its axial direction than the head member. The stick of composite materials is usable as a blank for the microdrill, micropunch and the head of the dot character printer. The stick of composite materials is prepared by hot-pressing two layers of materials under a high pressure and at a high temperature to obtain a composite material block composed of a super-hard layer and a supporting layer bonded to the super-hard…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.