Moulding of synthetic plastics products

Details Moulding of synthetic plastics products Moulding of synthetic plastics products

1976-12-09

1980-01-15

Spar, Robert J.

Dispensing

Automatic control

Motor control

222146HE, 222413, 425144, 425379R, B29F 306, B29F 308

Patent

active

041834488

ABSTRACT:
Apparatus for moulding articles of synthetic plastics. Plasticized plastics material is fed by a screw within a cylinder, along the cylinder to a nozzle from whence the material is injected into the mould cavity. The feeding of the material into the mould cavity is however effected by rotation of the screw almost in its forwardmost position instead of by longitudinal movement of the screw from its rearwardmost to its forwardmost position. The longitudinal position of the screw is adjusted during filling of the mould cavity by biasing apparatus acting axially on the screw and controlled by means sensing the position of the screw.
The temperature distribution throughout the cylinder, the nozzle, the screw and the screw tip is controlled by separate cooling circuits for the various zones, the various cooling circuits coming into operation at various times during a moulding cycle, as determined by timing apparatus.

REFERENCES:
patent: 3331100 (1967-07-01), Gould
patent: 3588956 (1971-06-01), Poux et al.
patent: 3822867 (1974-07-01), Evans

Affiliated with

Also associated with

Rating

Moulding of synthetic plastics products does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Moulding of synthetic plastics products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moulding of synthetic plastics products will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1024682