Clamping structure and method for clamping the mold unit of a mold injection apparatus
US4613475A · kind A · utility
Inventor
Key dates
| Filing date | Feb 19, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Feb 19, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1744
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for reducing the ram pressure normally required to seal the mold of an injection mold apparatus. A movable mold section is rigidly secured to a flat plate-like carriage member mounted for reciprocal movement relative to a stationary mold section. A plate unit is supported between the carriage member and the ram in a floating and axially aligned relation, with the movable mold section located within the perimetric confines of the carriage member and the plate unit. On linear extension of the ram to initially abutingly engage the plate unit and carriage member the movable mold section is moved into engagement with the stationary mold section whereby the ram clamping force is distributed uniformly in a pyramidal pattern from the ram to the perimetric portions of the mold sections to seal the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.