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Patent Searching and Data


Title:
INJECTION MOLDING MACHINE
Document Type and Number:
Japanese Patent JPS6250105
Kind Code:
A
Abstract:

PURPOSE: To unnecessitate an oil-pressure cylinder for driving a vacuum pump, by securing either of a cylinder or a piston rod of plunger type vacuum pump composing a vacuum sucking device to the side of bottom force, and the other to the side of top force.

CONSTITUTION: First pipeline 11 and second pipeline 13 are coupled through a change-over valve 12, and fourth pipeline 17 and fifth pipeline 22 are coupled through a change-over valve 16. When, from this state, the piston rod 9 of a mold closing cylinder 5 is extended downwards to execute mold closing operation, a slide bracket 8 falls down and the inside of a vacuum tank 14 is degassed by a vacuum pump 10 driven under interlocking with the mold closing cylinder 5. Then the vacuum tank 14 and a vacuum chamber 20 are coupled, and while the inside of a cavity 3 is degassed, resin material is poured into the cavity 3. The with the flows of air is equallized and the occurrence of air-trap can be prevented.


Inventors:
Haruhara, Akira
Application Number:
JP1985000190099
Publication Date:
March 04, 1987
Filing Date:
August 29, 1985
Export Citation:
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Assignee:
NISSAN SHATAI CO LTD
International Classes:
B29C39/00; B22D17/14; B22D17/26; B29C39/42; B29C45/00; B29C45/34; B30B12/00; (IPC1-7): B29C39/00; B29C39/42; B29C45/00; B29C45/34
Domestic Patent References:
JPS59179020U
JPS59107759A
JP36023604A