Electrically operated injection molding machine
AssigneeFanuc Corporation
InventorsYoshiharu Inaba, Masatoyo Sogabe
Life of this patent
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Abstract
An injection molding machine using a linear motion type electric motor (10, 20), as a drive source, is provided, which is simple and compact in construction. The linear motion type electric motor includes a non-magnetic shaft (21) on which yokes (22) and permanent magnets (23) are alternately fitted, and an annular stator (10) having an outer tube (11) within which cores (12) and printed type coils (13-18) are alternately disposed, the shaft extending through the stator. Upon supply of three-phase alternating currect to the coils, a screw of the injection molding machine coupled to the shaft is moved in unison with the shaft to thereby perform injection operation.
Claims20
An injection molding machine having an injection mechanism, a mold clamping mechanism, an ejector, and a nozzle touch mechanism, each including a linear motion member which is linearly movable, comprising:
- at least one linear motion electric motor having a stationary section and a movable section which is linearly movable relative to said stationary section;
- and
- means for operatively coupling each said movable section of said at least one linear motion electric motor to a corresponding one of said linear motion members of the injection mechanism, the mold clamping mechanism, the ejector, and the nozzle touch mechanism, so as to be movable in unison with said corresponding linear motion member.
An injection molding machine having an injection mechanism including a screw which is disposed for rotation about an axis and for linear movement along said axis, said injection mechanism comprising:
- an electric motor for rotating the screw;
- means for operatively coupling the screw to said electric motor;
- a linear motion electric motor having a stationary section and a movable section which is linearly movable relative to said stationary section;
- and
- means for operatively coupling the screw to said movable section of said linear motion electric motor so as to be movable in unison with said movable section.
A drive unit for an injection molding machine having a stationary base portion, comprising:
- a linear motion member which is linearly movable relative to the stationary base portion of the injection molding machine;
- and
- a linear motion electric motor having a stationary section supported by the stationary base portion of the injection molding machine and a movable section which is linearly movable relative to the stationary section, said linear motion member being coupled to the movable section of said linear motion electric motor and being operable to axially drive the movable section.
Dependencies are inferred from the claim text.