Injection molding unit

Details Injection molding unit Injection molding unit

1993-10-21

1994-09-27

Nguyen, Khanh

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Means responsive to abnormal condition completely stop...

425145, 425146, 425149, 425151, 425546, 425567, 425577, B29C 4518, B29C 4520, B29C 4576

Patent

active

053502884

ABSTRACT:
An injection molding unit has an injection molding machine 1 for injecting a molten resin plasticized in a screw cylinder 4 from a nozzle 9 fitted at the tip of the screw cylinder 4 by advancing a screw 3. An injection mold 31 forms a hollow 36 for forming an injection molded product 35 with a cavity mold 33 and a core mold 34. The injection molding unit further has a pressure relief valve 40 for releasing the resin out of a resin passage when a pressure greater than a predetermined value acts at any point on the resin passage, including the screw cylinder and ranging up to the terminal end of the hollow. The cavity mold 33 is of a split construction, in which a wall portion of the hollow is formed a plurality of segments.

REFERENCES:
patent: 3443628 (1969-05-01), Carr
patent: 3969055 (1976-07-01), Buckethal
patent: 4161380 (1979-07-01), Bishop
patent: 4411609 (1983-10-01), Yoshii et al.
patent: 4632652 (1986-12-01), Farrel
patent: 4863651 (1989-09-01), Koten
patent: 5194195 (1993-03-01), Okushima

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