Injection unit for injection molding machine

Details Injection unit for injection molding machine Injection unit for injection molding machine

1985-12-30

1987-11-24

Nozick, Bernard

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

425574, 425594, A23P 100

Patent

active

047086319

ABSTRACT:
An injection unit is disclosed with bridges for carrying a plastification cylinder and plastification screw, which bridges are capable of moving along stationary guide rods. The bridges also carry a central injection cylinder and drive cylinders, the drive cylinders being diametrically disposed with respect to the injection cylinder. An antirotation arrangement includes diametrically disposed support bearings to prevent the rotary drive motor as a whole from turning. The surfaces of the plunger pistons of two decompression cylinders serve as such support bearings. The plunger pistons are anchored adjacent one of the bridges, i.e., the bridge which bears the plastification screw. This bridge forms a structural unit with the other bridge. The overall arrangement frees the guide rods to a great extent from the repeating cyclical stress of bending due to resisting rotation of the rotary guide motor as a whole.

REFERENCES:
patent: 3729280 (1973-04-01), Hehl

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