System for producing foamed article, a molten resin preparing apparatus and a molding apparatus for use in foamed article production system
US6790020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jan 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/26
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a system in which carbon dioxide is supplied to a pressure chamber of a molten resin preparing apparatus which has established a certain temperature environment to diffuse the carbon dioxide in a material synthetic resin in a molten state. After turning the material synthetic resin into a gas-dissolving-resin in the pressure chamber, the gas-dissolving-resin is supplied to a mold space of a molding apparatus for compression molding. The pressure inside the mold space is quickly lowered by raising an upper mold of the molding apparatus quickly, whereby a foamed article is produced from the gas-dissolving-resin in the mold space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.