Linear motor and electric injection molding machine using the same
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United States of America Patent
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N/A
Issued Date -
Oct 2, 2003
app pub date -
Mar 28, 2003
filing date -
Mar 29, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An electric injection molding machine comprises a barrel which holds a screw therein, a voice coil type linear motor which moves the screw in the axial direction thereof. The linear motor has a coil, a yoke extending along the coil, and a magnet movable relatively to the coil in the axial direction thereof. The injection molding machine comprises a coolant passage in the yoke and a cooling device for cooling the coil. Temperature related to the coil or a coolant is detected, and the coolant is control in accordance with the detected temperature.
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