Method for producing a micro motor
AssigneeImpella Cardiotechnick GmbH
InventorThorsten Siess
Life of this patent
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Abstract
A micro motor is manufactured by slipping the parts (24a, 24b) of a stator (24) on the mandrel (60) which is placed into an injection mold (50). The motor housing is made by injecting polymer material (63), the stator parts (24a, 24b) being encapsulated in the housing. During injection, a bearing (27) is contained in the injection mold (50). Subsequently, the mandrel (60) is drawn from the stator and a prepared rotor is inserted. Thus, a cost effective and high-precision manufacture of an electric motor with very small dimensions is made possible.
Claims10
A method for manufacturing a micro motor (21), the method comprising the following steps:
- slipping stator parts (24a, 24b) onto a rigid mandrel (60),
- placing the mandrel (60) with the stator parts (24a, 24b) into an injection mold (50),
- injecting a polymer material (63) into the injection mold (60) for forming a motor housing (20),
- removing the injection mold (50) and the mandrel (60) from the motor housing (20),
- inserting a rotor (26) into the motor housing (20), the outer diameter of the rotor (26) being slightly smaller than that of the mandrel (60).
Dependencies are inferred from the claim text.