Composite molding apparatus for articles from two materials having a rotary mold block which includes pins for providing core areas
US4243362A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1979 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Jun 4, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2705/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for injection molding composite articles from two materials includes a rotary mold block carrying a two material mold half between a first material mold half and a second material mold half; the rotary block providing, in sequence, a first material mold cavity and a composite material mold cavity in which latter cavity the second material is injected over, and preferably in positive engagement with, the first material. Core pins are carried in the rotary block which includes means to index the pins for providing core areas in the first material and subsequently retracting the pins so that the second material can flow into the core areas for positive engagement of the composite molded materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.