Friction clamp for injection molding machine

Details Friction clamp for injection molding machine Friction clamp for injection molding machine

1991-01-07

1992-07-28

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

Mold motion or position control

425171, 4254512, 425590, 425595, B29C 4580

Patent

active

051336553

ABSTRACT:
A friction clamp assembly for securing a mold of an injection molding machine in a closed position includes a column rigidly secured to a moving platen carrying a mold half and a gripper bush assembly for frictionally engaging and locking the column in a desired position. The clamp assembly further includes a clamp piston for clamping the moving platen in a mold closed position. The clamp assembly transmits a clamping force to portions of a moving platen other than end portions via the column so that platen parallelism is maintained during closing, injection and hold pressure portions of a molding cycle while platen bending is substantially avoided.

REFERENCES:
patent: 3183555 (1965-05-01), Siegel
patent: 4017236 (1977-04-01), Penkman et al.
patent: 4158327 (1979-06-01), Aoki
patent: 4230442 (1980-10-01), Rees et al.
patent: 4443179 (1984-04-01), Wohlrab
patent: 4571169 (1986-02-01), Shima et al.
patent: 4605367 (1986-08-01), Gutjahr
patent: 4744740 (1988-05-01), Kojima
patent: 4846664 (1989-07-01), Hehl
patent: 4904177 (1990-02-01), Chiesi

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