Molding apparatus and molding method for light-permeable articles
US5961898A · kind A · utility
5Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1997 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Oct 2, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2017/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding apparatus for light-permeable articles which includes a nozzle that is movable up and down. A suction path and a suction device connected to the suction path are provided so as to suck a gas at a contact face of a sprue bush and its vicinity during the up/down movement of the nozzle. Accordingly, foreign substances, invading the mold can be sucked up before the apparatus performs a molding operation. Therefore, foreign substances are prevented from being mixed into the molded product. The molded product is accordingly improved in quality and yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.