Tamper-proof safety cover for injection molding machines

Details Tamper-proof safety cover for injection molding machines Tamper-proof safety cover for injection molding machines

1976-05-10

1978-09-12

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

With safety feature

Plural starting buttons or mold operating means dependent...

100 53, B29F 100, F16P 302

Patent

active

041134141

ABSTRACT:
A tamper-proof safety cover for the die closing unit of an injection molding machine, where the cover carries a control rod of hardened steel attached to the cover wall with a lead-sealed bracket, the control rod operating a mechanical safety interlock as well as electrical disconnect switches and a hydraulic shut-off valve, when the safety cover is removed from its closed position. The electrical and hydraulic interlocks are housed in a lead-sealed interlock control unit which is at all times engaged by the control rod over an inaccessible guide plunger and cam follower.

REFERENCES:
patent: 3020593 (1962-02-01), Olmstead et al.
patent: 3386133 (1968-06-01), Weiner
patent: 3728057 (1973-04-01), Grundmann
patent: 3744949 (1973-07-01), Hehl
patent: 3877858 (1975-04-01), Smith
patent: 3877859 (1975-04-01), Grazine

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