Continuous twin sheet thermoforming process and apparatus
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United States of America Patent
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Issued Date -
Nov 25, 2004
app pub date -
Apr 8, 2004
filing date -
Apr 8, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A twin sheet thermoformer apparatus and method in which an extruder continuously produces a sheet of hot plastic which is cut into cut sheets while the sheet is exiting the extruder, which are loaded in pairs into a series of transfer cars which are moved successively to an oven and then to a forming station. Sets of mold assemblies include pairs of molds with cavities which are faced upwardly to receive sheets lowered thereon and molded in the cavities and are then pivoted to face each other and moved together to fuse the molded sheets together to form a hollow part.
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