Injection-compression molding machine and method of molding by using the machine
US5059364A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1990 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Jan 5, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2043/5833
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of molding a plastic resin having for its object to enable the filling or spreading speed of a molten resin in a mold to be controlled in compliance with the shape of an article to be molded by changing the opening and closing speed of the mold or the injecting speed of the molten resin in an injection unit in compliance with the amount of the molten resin charged into the mold or the amount of the molten resin injected by the injection unit so that a stable molded article can be produced in a short time even in case the shape of a product to be molded is changed, and an injection-compression molding machine constructed to achieve the molding method. This injection-compression molding machine has a compression unit (21) for clamping the mold, an injection unit (10) for injecting the molten resin into the mold, a detector (25a) for detecting the stroke of the compression unit, a detector (26a) for detecting the opening and closing speed of the mold, input component (25b, 26b, 16b) for setting inputs of the stroke of the compression unit, the opening and closing speed of the mold, and the injecting speed, respectively, a controller (40) including an interface (45), a compres…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.