Controlled casting of a shrinkable material
US5114632A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Nov 1, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0002
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and a device are disclosed wherein a shrinkable polymer material is formed in situ in a mold without defects and with no internal stresses. A monomer or polymer solution is injected into the mold and solidified sequentially through the mold by exposure to an agent such as ultraviolet radiation, with simultaneous addition of monomer or polymer solution into the area of the mold not yet exposed to the solidifying agent. By controlling the rate at which the solidifying agent is moved across the mold and the monomer or polymer solution is injected into the mold, the resulting product completely fills the mold and is stressfree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.