Toggle drive system for driving in a thermoforming press
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United States of America Patent
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Jan 22, 2013
Grant Date -
Nov 4, 2010
app pub date -
Apr 29, 2010
filing date -
May 1, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A drive system for double toggle mechanisms used to move upper and lower platens with an electric servo motor-gear box drive shaft driving a crank arm arranged to drive a respective double toggle mechanism in turn connected to the platen. The drive shaft axis is located below the toggle mechanism link pivots and driven in a direction so that the motor acts to assist the double toggle mechanism in lifting the platen, reducing the servo motor peak load. The various components are arranged for symmetrical loading of the pivots concerning the toggle links to increase the evenness of the platen when being raised or lowered.
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