Pressure molding apparatus for molten resin
US5234336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1990 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jun 12, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/27
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a pressure molding apparatus for molten resin capable of efficiently maintaining the temperature of molten resin in the gate pipe, which is provided with molten-resin feeding gate pipes beneath the gate aperture of a molding unit composed of upper and lower molds in order that molten resin can be delivered to the interior of the molding unit before being pressed and molded, where the heater unit for maintaining the temperature of molten resin is disposed in the external periphery of the gate pipes in the state of being divided into two units in the vertical direction. Opposite portions of the gate pipe vertically being divided into two units are connected to each other so that length can optionally be adjusted to the extended or contracted direction, wherein the heater unit is discretely provided in the periphery of the gate pipes which are separately disposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.