Split frame for rotary vacuum mold unit

Details Split frame for rotary vacuum mold unit Split frame for rotary vacuum mold unit

1991-04-09

1992-12-01

Simmons, David A.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including shaping means comprising fluid pressure contacting...

249158, 2642978, 425385, B29C 5100

Patent

active

051679698

ABSTRACT:
An auxiliary double frame for a rotary vacuum mold unit or rotary thermoformer has a center auxiliary frame member and one or more auxiliary transverse frame members. The thermoformer has several identical frames that carry the plastic sheet workpieces from a load/unload station to a heat station or an oven, then to a vacuum molding station, and then to the load/unload station where the molded product is removed and replaced with a blank plastic workpiece. A center auxiliary frame member is mounted onto the front and back main frame members, and can be positioned on center or to the right or left of the center of the frame. Auxiliary transverse frame members are employed with the standard transverse clamping frame members. Pneumatic cylinders mount on the transverse clamping frame members and on the longitudinal frame members for operating pinbars. This system permits two or more molds to be employed at the same time.

REFERENCES:
patent: 3277224 (1966-10-01), Whiteford
patent: 3583036 (1971-06-01), Brown
patent: 3597799 (1971-08-01), Earle
patent: 3779687 (1973-12-01), Alesi
patent: 3810731 (1974-05-01), Anderson
patent: 3868209 (1975-02-01), Howell
patent: 4018551 (1977-04-01), Shuman
patent: 4097035 (1978-06-01), Shuman
patent: 4099901 (1978-07-01), Shuman
patent: 4637789 (1987-01-01), Netzik
patent: 4836762 (1989-06-01), Davis, Jr.

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