Injection-compression process for forming complex shaped items of elastomeric material
US5478519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1994 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Jul 5, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2019/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection-compression process for forming curable items of elastomeric material, the process including: an injection stage wherein a bottom half mold is injected by a nozzle with a quantity of fluid elastomeric material of a volume, at injection pressure, greater than that of the impression, the material in excess of the volume of the impression being collected outside the impression, in a recess at the injection nozzle and communicating with the impression; and a molding stage wherein the injection nozzle is replaced in fluidtight manner by an element of the same shape, but without the recess, for compressing the excess material into the impression until it sets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.