Title:
METHOD FOR PLASTICIZING AND WEIGHING PLASTIC MATERIAL
Document Type and Number:
Japanese Patent JP3195887
Kind Code:
B2
Abstract:
PURPOSE: To mold an injection-molded product using a molding material containing glass long fibers excellent in impact resistance without generating wt. irregularity.
CONSTITUTION: At the time of weighing in an injection molding machine constituted so that a molding material is weighed by rotating the injection screw 36 of an injection molding machine and the injection screw 36 having retreated by weighing operation is subsequently advanced to inject the weighed molding material from an injection nozzle 34, the operation rotating the injection screw 36 and allowing the same to retreat without allowing back pressure to act on the screw is performed during weighing. Further, the operation stopping the rotation of the injection screw 36 and allowing force of predetermined magnitude to act on the injection screw 36 in the advance direction thereof only for a predetermined time to compress the molding material during weighing so as not to leak the same from the injection nozzle 34 is performed.
Inventors:
Kazuhisa Yokoyama
Masamichi Koide
Mitsuru Yokouchi
Yukisa Kumagai
Mitsuhiro Mochizuki
Masamichi Koide
Mitsuru Yokouchi
Yukisa Kumagai
Mitsuhiro Mochizuki
Application Number:
JP83695A
Publication Date:
August 06, 2001
Filing Date:
January 06, 1995
Export Citation:
Assignee:
Japan Steel Works, Ltd.
Polyplastics Co., Ltd.
Polyplastics Co., Ltd.
International Classes:
B29C45/50; B29C45/76; (IPC1-7): B29C45/50; B29C45/76
Domestic Patent References:
| JP2167718A | ||||
| JP1218825A | ||||
| JP6198688A |
Attorney, Agent or Firm:
Hisako Ishido