Injection assembly for an injection molding machine
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United States of America Patent
Stats
-
Jul 30, 1996
Grant Date -
N/A
app pub date -
Dec 20, 1994
filing date -
Dec 23, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The extruder screw drive has a first and a second motor, a screw mechanism connected to the first motor and to the extruder screw for translating it in the extrusion cylinder, and a slide mechanism connected to the second motor and to the extruder screw for rotating it in the extrusion cylinder. The screw mechanism and the slide mechanism are coaxial and partially fit into one another to provide an axially compact arrangement. The motors can be hollow shaft electric motors axially aligned together, and pressure regulated hydraulic axial force can be added to the extruder screw during plasticating as it retracts due to increased volume of plastic at an output end of the extrusion cylinder.
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