System for individual control of multiple valve gates
US6554604B1 · kind B1 · utility
23Cited by
1References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Nov 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2817
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an injection molding machine, an apparatus for automatically controlling the movement of two or more valve pins wherein each valve pin is driven by a separately controlled fluid driven cylinder each cylinder being mounted on a heated manifold and being interconnected to a separate valve pin for effecting reciprocal movement of the valve pin wherein the reciprocal movement of the valve pin controls the flow of molten plastic being delivered through a nozzle which delivers molten plastic to a gate of a mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.