Thermoforming machine with variable mold closed cycle

Details Thermoforming machine with variable mold closed cycle Thermoforming machine with variable mold closed cycle

B - Operations, Transporting

29

C

18/1063, 18/1146

B29C 51/38 (2006.01)

Patent

CA 1126463

THERMOFORMING MACHINE WITH VARIABLE MOLD CLOSED CYCLE ABSTRACT OF THE DISCLOSURE A thermoforming machine having opposed mold platens includes a linkage system driven in cyclic move- ment by a single rotary cam to cyclically shift the platens between their open and closed position. The cam is driven by a variable speed motor which is controlled in a manner such that the rotary speed of the cam during different portions of a cam revolution may be set to a speed which is different than the rotary speed of the cam during other portions of each revolution. By adjusting the speed differential or by adjusting the angular ex- tent of that portion of a revolution of the cam over which the different speed is maintained the time duration of any chosen portion of the cycle may be adjusted independ ently of the time duration of other portions of the cycle. The platens are mounted for reciprocatory movement upon a three-post frame.

327288

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