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Method for manufacturing impeller rotor assembly

A manufacturing method and rotor technology, applied in the direction of electric components, manufacturing motor generators, household components, etc., can solve problems such as inappropriate use, durability problems, etc., and achieve the effect of preventing surface defects

Active Publication Date: 2017-10-13
金顺植
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned patent involves improving the combination of the impeller and the magnet to a method of guiding the assembly, and making up for the problem of cracks on the inner surface of the magnet without a mold forming process, but there may be problems in durability, and due to the combination of components It is not suitable for the use of impellers of pumps that require high-speed rotation, etc.

Method used

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  • Method for manufacturing impeller rotor assembly
  • Method for manufacturing impeller rotor assembly
  • Method for manufacturing impeller rotor assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In order to prevent the above problems, the above-mentioned magnetic yoke may further be provided with a plurality of locking portions 300 protruding toward the opposite direction of the rotation center axis along one outer peripheral surface.

[0040] Thus, when the magnet and the yoke are assembled in the third step S30, the locking portion 300 inserted on one side of the outer peripheral surface of the yoke 200 can be locked to the other outer peripheral surface of the magnet 100. to assemble.

[0041] Refer to the above image 3 To illustrate, when injecting the molten plastic resin A, the plastic resin A is injected along the A-B direction. Therefore, the yoke 200 may be squeezed together with the plastic resin A to be inserted further along one side of the magnet 100 , ie, along the A-B direction, so the assembling method can prevent this.

[0042] The protruding portion 110 formed on one side surface of the magnet 100 serves as a flow path for the plastic resin...

Embodiment 2

[0044] Due to the above reasons, the above-mentioned magnet 100 may also be provided with a plurality of locking portions 300 protruding toward the direction of the rotation center axis along one side of the inner peripheral surface.

[0045] In the third step, the yoke 200 is inserted into the magnet 100 until the locking portion 300 formed on the magnet 100 catches the other outer peripheral surface of the yoke 200 .

[0046] the above Figure 4For explanation, the reason is the same as that of the above-mentioned embodiment 1. In order to prevent the above-mentioned yoke 200 from being further inserted together with the above-mentioned plastic resin A along the direction of one side surface of the above-mentioned magnet 100, the other side outer peripheral surface of the above-mentioned yoke 200 is caught. The locking portion 300 formed on the magnet prevents the yoke 200 from moving along one side surface of the magnet 100 , that is, further along the A-B direction.

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Abstract

The present invention relates to a method for manufacturing an impeller rotor assembly, and more specifically to a technique, when manufacturing a rotor assembly that is integrally formed with an impeller, that forms a very small space between a magnet of the rotor and a yoke for supporting the magnet, and thereby prevents internal and external crack defects of the magnet that could occur due to drastic temperature changes during injection moulding of a high temperature molten resin. The method for manufacturing an impeller rotor assembly according to the present invention comprises: step 1 of manufacturing a cylindrical magnet in which a hollow is formed; step 2 of manufacturing a magnet yoke that is assembled in an inner circumferential surface of a magnet, that has a cylindrical shape in which a hollow is formed, and that compared to the inner diameter of the magnet, has an outer diameter formed 0.02-0.3 mm smaller than the inner diameter of the magnet; step 3 of assembling the magnet and the magnet yoke; and step 4 of moulding by coupling the assembly of the magnet and the magnet yoke to a mould. The method for manufacturing an impeller rotor assembly according to the present invention has the effect that it can prevent surface defects of the magnet that are prone to occur due to the difference between the internal temperature and the external temperature of the magnet when cooling after injection moulding of a high temperature plastic resin during the manufacture of the impeller rotor assembly.

Description

technical field [0001] The present invention relates to a method of manufacturing an impeller rotor assembly, and more specifically, relates to a technique for injecting a fine space between a magnet of the rotor and a yoke for supporting the magnet when manufacturing a rotor assembly integrally formed with the impeller. When the resin is melted at high temperature and molded, it can prevent internal and external crack defects of the magnet caused by rapid temperature changes. Background technique [0002] Generally, an impeller rotor assembly for an automotive water pump is integrally formed by molding a cylindrical magnet, a yoke, and an impeller with a plastic resin, wherein the cylindrical magnet is formed with a hub so that Combined with the axis of rotation. [0003] In the above-mentioned conventional process of integrating the magnet and the yoke, when high-temperature plastic resin is injected to form a mold, during the cooling process, the outside of the magnet co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14
CPCB29C45/1418B29C45/14836B29L2031/08H02K1/278H02K7/14H02K15/03B29C45/14H02K1/146
Inventor 金顺植
Owner 金顺植