Internal latch for an injection mold
US6431852B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 2, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Feb 2, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2604
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An internal latch for an injection mold that allows opening of the mold at parting lines while selected plates are locked in position and prevented from moving. The system includes an external bushing, an internal bushing that carries cam retainers, and a locking pin. The system may be used in an injection mold having in sequence a stationary plate, a stripper plate and a support plate. The external bushing is secured to the support plate, the internal bushing is secured to the stripper plate, and the locking pin is secured to the stationary plate. The cam retainers selectively engage grooves in the external bushing to lock the stripper plate from moving with respect to the support plate when the locking pin is inserted into the internal bushing beyond the location of the cam retainers. When the locking pin is extracted from the internal bushing, the cam retainers are free to move inwardly thus unlocking the stripper plate from the support plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.