Injection molding unit
US5350288A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 21, 1993 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Oct 21, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/58
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molding unit has an injection molding machine 1 for injecting a molten resin plasticized in a screw cylinder 4 from a nozzle 9 fitted at the tip of the screw cylinder 4 by advancing a screw 3. An injection mold 31 forms a hollow 36 for forming an injection molded product 35 with a cavity mold 33 and a core mold 34. The injection molding unit further has a pressure relief valve 40 for releasing the resin out of a resin passage when a pressure greater than a predetermined value acts at any point on the resin passage, including the screw cylinder and ranging up to the terminal end of the hollow. The cavity mold 33 is of a split construction, in which a wall portion of the hollow is formed a plurality of segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.