Method for controlling injection unit of injection molding machi

Details Method for controlling injection unit of injection molding machi Method for controlling injection unit of injection molding machi

Filed on

1990-01-18

Date issued

1991-07-02

Examiner

Heitbrink, Jill L.

Patent Class

Plastic and nonmetallic article shaping or treating: processes

SubClass

Mechanical shaping or molding to form or reform shaped article

SubSubClass

Shaping against forming surface

Other Related Categories

26432817, 264349, 425207, 425587, 366 78, B29C 4550

Type

Patent

Status

active

Patent number

050283731

Description

ABSTRACT:
In an injection unit of an in-line screw type injection molding machine, a screw is provided rotatably in both normal and reverse directions within a heating cylinder. The screw is periodically reversed in a charging stroke with the period of normal rotation being longer than that of reverse rotation, whereby a resin material is kneaded and plasticized. As a result, the resin in a melting and pooling zone (flow zone) between the inner wall of the heating cylinder and the outer peripheral wall of the screw is effectively moved back and forth and hence plasticized and molten into a uniform molten resin.

REFERENCES:
patent: 4042660 (1977-08-01), Bishop
patent: 4592712 (1986-06-01), Gutjahr
patent: 4879077 (1989-11-01), Shimizu et al.

Affiliated with

Also associated with

Rating

Method for controlling injection unit of injection molding machi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for controlling injection unit of injection molding machi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling injection unit of injection molding machi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1245066