Method of producing a molded article using a mold assembly with an insert block
US5741446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | May 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/247
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for the production of a molded article, using a mold assembly including a mold having a cavity, for producing a molded article from a thermoplastic resin; an insert block formed of ceramic or glass having a thermal conductivity of 2.times.10.sup.-2 cal/cm.sec..degree.C. or less, the insert block being disposed inside the mold, constituting part of the cavity, and having a thickness of 0.5 mm to 10 mm; and a cover plate for covering a peripheral portion of the insert block. The cover plate is attached to the mold and constitutes part of the cavity, wherein a clearance between the insert block and the cover plate is 0.001 mm to 0.03 mm, an amount of overlapping of the insert block and the cover plate is at least 0.1 mm. The method includes filling a molten thermoplastic resin in the cavity, and then cooling the thermoplastic resin to solidness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.