Changing device for the screw cylinder of an injection molding m

Details Changing device for the screw cylinder of an injection molding m Changing device for the screw cylinder of an injection molding m

1987-11-04

1988-10-18

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

425550, B29C 4503, B29C 4574

Patent

active

047783702

ABSTRACT:
A changing device for the screw cylinder of an injection molding machine. The screw of the screw cylinder is in releasable coupling connection with a drive unit of the machine. For releasing and uncoupling the coupling connection, the screw cylinder including screw can be displaced relative to the injection molding machine essentially transversely of the longitudinal direction of the screw cylinder. Two hydraulic cylinders are arranged spaced apart next to each other symmetrically and parallel to the longitudinal center plane of the injection molding machine. The two cylinders are connected to each other by means of a transverse member. A free space extending forwardly from the drive unit is defined by the two hydraulic cylinders and the transverse members. The free space forms an alignment seat which is open towards the front and towards the back and a longitudinal side. In the coupled position, the screw cylinder is fixable and lockable to the drive unit in this alignment seat. The free space forming the alignment seat of the changing device is open toward the bottom, so that the transverse member which connects the hydraulic cylinders acts on the upper longitudinal side of the hydraulic cylinders.

REFERENCES:
patent: 3822975 (1974-07-01), Hehl
patent: 3880560 (1975-04-01), Takahashi
patent: 4430059 (1984-02-01), Bielfeldt
patent: 4680002 (1987-07-01), Hehl
patent: 4704078 (1987-11-01), Hehl
patent: 4708622 (1987-11-01), Hehl

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