Method of changing the resin in an injection molding machine using a nozzle touch plate
US4808355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1988 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | May 5, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1755
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
For an injection molding machine a nozzle touch plate is provided which is slidable on a surface of a stationary plate opposite to the surface to which a metal mold is secured. The nozzle touch plate is brought to a position for preventing advancement of an injection nozzle into contact with the metal mold. In this position, the injection nozzle is brought into contact with the nozzle touch plate so that resin remaining in the injection cylinder is purged against the plate at the time of changing the type or color of the resin whereby the resin is prevented from being injected into the metal mold. After purging the nozzle touch plate is retracted to permit injection molding of new resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.