Can of a drive motor for a pump assembly
AssigneeGrundfos Management A/S
InventorsJørn Toftegaard Hansen, Tom Eklundh Larsen, Finn Mathiesen HøJ
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Abstract
A can of a drive motor is provided for a pump assembly, wherein the can (22) is manufactured at least partly of plastic (52). At least in a part of the can (22) the plastic (52) is reinforced by individual fibers (32) distributed in the plastic (52). The fibers (32) in at least one layer (35) of the can (32) are aligned in a defined manner in the peripheral direction with respect to the longitudinal axis (Z) of the can (22). A method for manufacturing such a can is also provided.
Claims13
A method for manufacturing a can of a drive motor for a pump assembly, the can having a closed end, the method comprising the steps of:
- admixing individual fibers (32) with fluid plastic (52) for reinforcement,
- introducing the admixture into an injection channel of an injection molding tool defining a shape of the can (22) to be manufactured to mold a peripheral wall (30) of the can (22), the injection channel being centrally located in an axial end of the injection molding tool which corresponds to the closed end of the can, the can (22) having a longitudinal axis (Z) and the peripheral wall (30) having at least three layers, the at least three layers including a middle layer and two outer layers, and
- rotating an inner mold part (2) of the injection molding tool relative to an outer mold part (12) of the injection molding tool during and/or after the introducing step,
- wherein, after the rotating step, the admixed individual fibers (32) in the middle layer of the peripheral wall (30) are oriented in a circumferential direction with respect to the longitudinal axis (Z) and the admixed individual fibers (32) in the two outer layers of the peripheral wall (30) are oriented in an axial direction with respect to the longitudinal axis (Z).
Dependencies are inferred from the claim text.