Molding device for molding optical elements
US5062786A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1989 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Dec 11, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2035/0816
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding device a molding machine with both fixed and movable side molds and which has cavities for molding a product. An injection cylinder injects resin into the cavities and a mold driving control performs the opening and closing operations of the molds. During the molding cycle, the cavities are heated by a high frequency heating system consisting of a coil, oscillation control section for inducing high frequency oscillation to the coil during the opening of the mold and stopping the high frequency oscillation during the closing of the molds. A mold temperature detector having a temperature sensor measures the temperatures of the molds and a temperature control initiates the circulating of a cooling medium within a circulating pathway which is provided within the molds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.