Manufacture of moulded products
US4832880A · kind A · utility
39Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1986 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Dec 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/115
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a process for the manufacture of a moulded product by compression of a powder or granules in a die, a powdered die lubricant is used, lubricant particles are electrically charged and the charged particles are fed to the die in advance of the moulding powder. An apparatus for carrying out the process is also provided, the apparatus including a first feed for feeding a powdered lubricant to the die, a second feed for feeding moulded powder to the die after the powdered lubricant, and means for maintaining the electrical potential of the die at a predetermined value different from that of the powdered lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.