Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1996-07-19
1998-12-29
Ortiz, Angela
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
26427219, 2642722, B29C 4514, B29C 4536, B29C 7072
Patent
active
058536434
ABSTRACT:
A method for encapsulating an electric motor in resinous material by an injection molding process comprises providing a motor assembly having an armature and associated drive shaft supported at one end by a bearing bracket. The motor is inserted into a cavity of a multi-piece mold in which one part of the mold has a bore for slidingly receiving the motor shaft with the bearing bracket in close abutment with the mold. The motor is thus supported centrally of the mold cavity. Liquid resinous material is injected into the mold preferably from a side of the motor opposite the motor shaft such that the liquid material forces the motor bearing bracket against the apertured part of the mold. The resinous material is thereby prevented from entering into the bearing bracket into contact with the motor shaft. In order to positively locate the motor in a predetermined orientation within the mold cavity, the bearing bracket may be provided with a small recess into which a cooperating projection of the mold is received.
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