Multiple zone heating of molds
US4621995A · kind A · utility
36Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Oct 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86759
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding machine has a valve assembly that includes means for selectively heating or cooling a mold by controlling flow of gas through an array of gas impingement jets disposed adjacent the backside of a mold surface to regulate the temperature over respective first and second areas of the mold surface. Gas heating and cooling circuits include two drive cylinder regulated plate valves for supplying gas at the gas impingement jet nozzles associated with the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.