Method and apparatus for mold injection
US4397806A · kind A · utility
Inventor
Key dates
| Filing date | Oct 26, 1981 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Oct 26, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/54
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method and apparatus for the injection of an injection material into a mold includes an upright extruder mechanism having an upright feed screw driven from its lower end. Material introduced at the top of the extruder is fed by the screw outwardly of the extruder through an outlet projected laterally outwardly from the extruder at a position adjacent the lower end of the screw. The extruder outlet constitutes a piston receivable with a cylindrical material chamber of an injection nozzle unit. Material is fed in one direction in incremental amounts from the extruder and into the material chamber when the extruder is moved in one direction relative to the injection nozzle unit, and is then forced from the material chamber by the extruder outlet and into the nozzle unit for injection into a mold when the extruder is moved in an opposite direction relative to the nozzle unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.