Transfer molding press
US5851559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1995 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Oct 31, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/228
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Real time distance and pressure data of a plunger (35) relative to a mold compound is provided by a compensation assembly (29) in a mold press (10). The compensation assembly has a sliding block assembly (30) which moves substantially in the same direction as the plungers (35). The sliding block assembly (30) has pressure control cylinders (33) which limit the pressure plungers (35) can apply. If the pressure on the plungers (35) should exceed this limit, the plungers (35) retract towards the sliding block assembly (30). A sensor (37) is coupled between the sliding block assembly (30) and the plungers (35) to measure the distance the plungers have moved towards the sliding block assembly (30). In one application, the sensor (37) is formed from a linear voltage displacement transducer (LVDT) so the mold press (10) can have real time pressure and distance data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.