Thermoplastic gob feeding and transfer method and apparatus

Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,...

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Details

65303, 65304, 264145, 264148, 264238, 264297, 264299, 264309, 425256, 425261, 425308, 425447, 425809, B29B 506

Patent

active

042960614

ABSTRACT:
The invention provides an improved method and apparatus for effecting the severing of successive gobs from a continuously extruded rod-like formation of organic thermoplastic material, followed by the successive transfer of the gobs to successive molding units which are continuously movable relative to the free-fall path of the gobs. Severing means are provided which are operative upon a vertically extruded rod-like formation of hot organic thermoplastic material. A plurality of molding members, each having an open top molding cavity, are moved in timed relationship to the gob severing means along a horizontal path adjacent to the free fall path of the severed gobs. Each gob is caught by a transfer device which is movable under the free-fall path of the gobs in timed relationship to the gob severing and the movement of the molding members. The transfer device effects the lateral displacement of each gob deposited on its top surface and then a stationary deflecting device moves the gob off the surface of the transfer device and drops it into the open top molding cavity of the moving molding members. Cooling of the transfer plate and deflector provides an identical thermal history for each gob.

REFERENCES:
patent: 1712327 (1929-05-01), Brooke
patent: 2199356 (1940-04-01), Brown
patent: 3053221 (1962-09-01), Heffley et al.
patent: 3162522 (1964-12-01), Tingley
patent: 3198616 (1965-08-01), Havens
patent: 3431830 (1969-03-01), Stovall
patent: 4002451 (1977-01-01), Knapp et al.

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