Mold protection device
US4515544A · kind A · utility
6Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1984 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Mar 29, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/842
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Sensor arranged to detect the proper placement and quantity of one or more inserts in the cavity of an injection molding machine. The sensor is preferably formed of a spring-biased plunger through one of the cavity shells. A photodetector monitors the movement of the plunger as the cavity-forming shells are closed and activates an alarm signal if the plunger movement is excessive before detection of proper mold closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.