Method for making mold inserts
US5707578A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jun 14, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y80/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing plastic injection mold inserts capable of forming a three-dimensional article in a plastic injection molding process. The method includes (a) forming a master mold insert having a recess therein which has a shape which is complementary to at least a portion of the shape of the three-dimensional article; (b) preparing a temporary reverse mold of the master mold insert; (c) positioning a metal gate in the reverse mold adjacent to and in contact with the article form; (d) introducing a hardenable plastic resin into the reverse mold; (e) allowing the resin to harden to form a mold insert; and (f) removing the mold insert from the reverse mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.