Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1998-01-15
2000-05-09
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264543, 425537, B29C 4970
Patent
active
060600128
ABSTRACT:
A method and an apparatus are provided for blow-molding hollow articles. The blow-molding apparatus includes a carrousel mounted to rotate within a support frame. The carrousel carries four molds around a circular mold path. Two blow-molding work stations are disposed next to the mold path in fixed positions relative to the frame. The carrousel is indexed to cause each mold to pause by each work station one time during each carrousel revolution. The molds pause by each work station to allow blow-molding operations to be performed in conjunction with each mold at each work station. At one blow-molding work station, located at the 12:00 position of the mold path, an extruder injects parison into each mold. At the other work station, located in the 9:00 position of the mold path, a take-out mechanism extracts blow molded articles from the molds and places them upright on a conveyor. The take-out mechanism includes an oscillator arm that is rotated ninety degrees at a time between a horizontal article engagement position and a vertical article release position. A take-out member extends from the oscillator arm and includes expandable pins that extend into the molds to grip the blow-molded articles at their necks.
REFERENCES:
patent: 3780492 (1973-12-01), Corderoy
patent: 3941863 (1976-03-01), Pollock et al.
patent: 3945486 (1976-03-01), Cooper
patent: 4421472 (1983-12-01), Martin, Jr.
patent: 4439394 (1984-03-01), Appleyard
patent: 4902217 (1990-02-01), Martin et al.
Johnson David M.
Weber Lawrence H.
R & B Machine Tool Company
Timm Catherine
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