Dual-hopper injection unit for injection molding machine
US4629410A · kind A · utility
Inventor
Key dates
| Filing date | Jul 28, 1983 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Jul 28, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C31/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A dual-hopper supporting structure for the injection unit of an injection molding machine which has a transverse horizontal guide plate slidingly guiding a hopper carriage. To the upper side of the latter are bolted the base assemblies of two raw material hoppers, as well as a translation drive motor with a pinion which engages a drive rack on a longitudinal edge of the transverse guide plate. The transverse guide plate has a central charge bore coinciding with the operating position of the hoppers and equidistant evacuation bores in the two waiting positions of the hoppers. In addition to speeding up changeovers in the production setup, the novel structure gives the injection unit marbling capabilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.