Thermally assisted ultrasonic welding apparatus and process
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United States of America Patent
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-
Jul 16, 1985
Grant Date -
N/A
app pub date -
Apr 12, 1983
filing date -
Apr 12, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus are provided for use in an ultrasonic vibratory welder for pre-heating the workpieces prior to welding and, thereafter, for continuously monitoring the temperature of the anvil and of the welding tip during subsequent welding operations to insure their temperature remains within a pre-determined range during the entire welding cycle. It has been found that weld characteristics, particularly weld size, shape, configuration and strength are dependent upon the temperature of the anvil and welding tip. Thermostatically controlled resistance heating means are provided in the anvil and/or in the welding tip for pre-heating of the workpieces. Automatic control means, are also provided for alternately heating and cooling the anvil and welding tip during the welding cycle.
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