Apparatus having an in-the-mold gas injection pin
US5198238A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | May 16, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2049/6072
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for use in gas assisted injection molding of plastic material so as to form an injection molded product includes a pair of mold members defining when closed a sealed cavity. A first opening is provided in one of the mold members for allowing the injection of a plastic material into the cavity. A device is provided to supply a pressurized gas and a second opening is provided in one of the mold members for allowing the injection of the pressurized gas into the cavity. A probe is located in the second opening and is adapted to be reciprocated therein from a retracted position to an extended position. The probe has a first end adapted to selectively extend into the cavity, a second end, and a longitudinally extending bore which terminates in a port located adjacent the first end. The bore is used to guide the gas into the cavity. A device is provided for reciprocating the probe in relation to the cavity. A control system controls the operation of the device for reciprocating as well as the device for supplying a gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.