Device and method for feeding molten plastic material into a molding cavity
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United States of America Patent
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Mar 23, 2021
Grant Date -
Dec 28, 2017
app pub date -
Dec 4, 2015
filing date -
Dec 23, 2014
priority date (Note) -
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Abstract
The device for feeding molten plastic material into a molding cavity (30) includes a melting chamber (20) in which metered solid plastic material is introduced, a sonotrode (10) provided for tightly inserting a portion thereof into said melting chamber (20), causing the plastic material to melt by means of vibration, and relative movement of the sonotrode (10) and melting chamber (20) allows driving the molten plastic material inside a molding cavity (30) communicated with said melting chamber (20), the device including resistance sensors (40) allowing an electronic control device (50) to know the resistance that the plastic material has against the movement of the sonotrode (10).
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