Electrically-operated injection molding machine
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
Jul 6, 1998
filing date -
Jul 7, 1997
priority date (Note) -
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Abstract
A precision injection molding apparatus is provided with servo mechanisms in various portions of the apparatus including a resin injection portion to provide precise feedback control of resin weighing, blending, and injection of weighed and blended resin into a die cavity between closed dies, a die opening and closing portion to provide precise feedback control for driving a movable die from a spaced position into a closed position relative to a fixed die to provide the die cavity, a gate cutting portion to provide precise feedback control of gate cutting, a molding ejecting portion to provide precise feedback control of ejecting a formed molding and a molding removing portion to provide precise feedback control for removing the molding from between opened dies. Because servo mechanisms are used, there is no variation in repetitive response accuracy of motion and speed of operation can be increased in terms of cycle speeds without loss of accuracy.
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