Drive motor and drive apparatus for a molding machine
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United States of America Patent
Stats
-
Apr 23, 2002
Grant Date -
N/A
app pub date -
Feb 22, 1999
filing date -
Feb 23, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drive motor has a shaft supported by a casing to be rotatable and movable in the axial direction over a predetermined stroke. A portion of the shaft is utilized in order to form a rotary motor section for rotating the shaft, and another portion of the shaft is utilized in order to form an electromagnetic plunger section for moving the shaft in the axial direction. The rotary motor section and the electromagnetic plunger section are integrally built in the casing. The drive motor is used in a drive apparatus for a pre-plasticization-type injection molding machine. The front end of the shaft is connected to the rear end of a screw disposed within a barrel of a plasticizing unit of molding machine. Through axial movement of the shaft, a resin passage of the barrel is opened and closed by a valve portion provided at the front end of the screw.
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