Heat displacing type dies
US4781562A · kind A · utility
18Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Aug 11, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92904
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a heat displacing type die adapted to extrude a sheet of molten resin, a heat displacing unit provided with a heater is secured to an upper die block. A lip gap is defined between a flexible lid and a stationary lip respectively provided for the upper and lower die blocks. The lower end of a bolt extending through the heat displacing unit is normally in contact with or secured to the flexible lip while the upper end is secured to the upper portion of the heat displacing unit. In a modified embodiment the bolt is air cooled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.