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JP-2026075347-A - Manufacturing method for a magnet device inside a pump

JP2026075347AJP 2026075347 AJP2026075347 AJP 2026075347AJP-2026075347-A

Abstract

[Problem] To provide a method for manufacturing a magnet device inside a pump. [Solution] A process for preparing an injection mold, a hot press equipment, a magnet unit 10, and a base unit 30 made of plastic material, comprising: step A, fixing an ejector pin unit inside the injection mold; step B, installing the magnet unit 10 inside the injection mold so that the magnet unit 10 is supported and positioned by the ejector pin unit; step C, injecting plastic material into the injection mold to form a wrapping unit 20 that encloses the outside of the magnet unit 10 and a part of the ejector pin unit; step D, removing the intermediate product after cooling; and step E, installing the base unit 30 on the intermediate product and heating and pressing it in the hot press equipment to heat-bond the base unit 30 to the intermediate product to obtain a pump-in-magnet device. [Selection Diagram] Figure 8

Inventors

  • ▲黄▼ 丁財

Assignees

  • 日益電機股▲ふん▼有限公司

Dates

Publication Date
20260508
Application Date
20241022

Claims (6)

  1. A step of preparing an injection mold, a hot press equipment, a magnet unit, and a base unit made of plastic material, wherein the injection mold has a mold hole and includes an ejector pin unit fixed inside the mold hole, Step B involves opening the injection mold, installing the magnet unit in the mold hole of the injection mold so that the magnet unit is supported and positioned by the ejection pin unit, and then closing the injection mold from the open state. Step C involves injecting a plastic material into the mold hole of the injection mold to form a wrapping unit that encloses a part of the ejector pin unit and the outside of the magnet unit, After cooling, step D involves changing the injection mold from the closed state to the open state, and removing the intermediate product, in which the internal bonding area is formed by the ejection pin unit, from the mold hole. A method for manufacturing a pump magnet device, comprising step E, which includes step E of installing the base unit in the internal bonding area of the intermediate product and heating and pressing it in the hot press equipment to heat-bond the base unit to the internal bonding area of the intermediate product in order to obtain a pump magnet device.
  2. In step A, the base unit includes a bottom plate and an external coupling area installed on the bottom plate. The outer connecting area has an outer annular connecting member connected to the bottom plate and an annular projection connected to the bottom plate and surrounding the outer circumference of the outer annular connecting member. In step D, the internal bonding area of the obtained intermediate product has a bottom end face, a recessed lower part recessed in the bottom end face, an internal annular bonding member protruding in the recessed lower part, and an external sealing annular portion protruding in the recessed lower part and surrounding the outer circumference of the internal annular bonding member. The method for manufacturing a pump internal magnet device according to claim 1, characterized in that, in step E, the bottom plate of the base unit is brought into contact with the bottom end face, the annular projection is brought into contact with the outer sealing annular portion, and the outer annular joining member is brought into contact with the inner annular joining member.
  3. In step A, the protruding pin unit comprises a base plate, a protruding portion connected to the base plate, a plurality of protruding pins connected to the protruding portion, an outer convex rib connected to the protruding portion and surrounding the outer circumference of the plurality of protruding pins, an inner convex rib installed inside the plurality of protruding pins, and an annular block installed between the outer convex rib and the inner convex rib. Each of the aforementioned protruding pins is formed in a columnar shape, An annular area is defined between the annular block and the inwardly protruding rib, The annular area comprises an annular groove surrounding the outer circumference of the inwardly protruding rib, and a plurality of circular grooves communicating with the annular groove and each surrounding the outer circumference of a corresponding protruding pin. The outer annular joining member of the base unit has an outer ring portion and a plurality of outer positioning rings that are spaced apart from each other and connected to the outer ring portion. In step D, the inner annular joining member of the intermediate product obtained has an inner annular portion whose position corresponds to the outer annular portion, and a plurality of inner positioning rings which are spaced apart from each other and connected to the inner annular portion (219'), The positions of the plurality of internal positioning rings correspond to the plurality of external positioning rings, and The inner circumferential surface of each of the plurality of internal positioning rings defines each of the plurality of recessed holes, The method for manufacturing a pump internal magnet device according to claim 2, characterized in that, in step E, the outer ring portion of the base unit is brought into contact with the inner ring portion, and the plurality of outer positioning rings of the base unit are brought into contact with the plurality of inner positioning rings.
  4. The method for manufacturing a magnet device inside a pump according to claim 1, characterized in that, in step E, the heating temperature is a maximum of 300°C.
  5. The method for manufacturing a magnet device inside a pump according to claim 1, characterized in that, in step E, the melting depth of the press is within the range of 0.5 mm to 1 mm.
  6. The method for manufacturing a pump-in-a-magnet device according to claim 1, characterized in that, in step A, the constituent material of the base unit is polypropylene, polyvinylidene fluoride, or carbon fiber-filled ethylene tetrafluoroethylene copolymer.

Description

This invention relates to a pump for transporting liquids, and more specifically, to a method for manufacturing a magnet device inside a pump for transporting chemical agents. Patent Document 1 discloses a canned motor pump that includes a base, a positioning unit, a motor unit, a pump front cover, and a rear cover. The rotor of the motor unit has a metal internal magnet member and a plastic layer that encloses the metal internal magnet member from the outside. The plastic layer is formed by injection molding to enclose the entire metal internal magnet component. Taiwan Patent No. I795038 This is a block diagram showing one embodiment of a method for manufacturing a magnet device inside a pump according to the present invention.This is a cross-sectional view showing the application of the in-pump magnet device manufactured according to the above embodiment to a canned motor pump.This is an exploded view showing the application of the in-pump magnet device manufactured according to the above embodiment to a canned motor pump.This figure shows the injection molding of the above embodiment.This is a cross-sectional view along line V-V in Figure 4.This figure shows the hot melt of the above embodiment.This figure shows the press operation of the above embodiment.This is a cross-sectional view showing a pump magnet device manufactured according to the above embodiment.This is a cross-sectional view along the line IX-IX in Figure 8.This is an exploded view of the components of the pump magnet device manufactured according to the above embodiment. To more clearly illustrate the object, technical means, and advantages of the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings of the embodiments of the present invention. It will be clear that the embodiments described are some, and not all, embodiments of the present invention. Typically, the components of the embodiments of the present invention depicted and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided below in the accompanying drawings does not constitute any limitation on the scope of protection of the present invention, but merely illustrates selected embodiments of the present invention. Before describing the present invention in more detail, it should be noted that, where appropriate, reference numerals or their terminal portions are repeated between figures to indicate corresponding or similar elements, and these may optionally have similar characteristics. In this description of the present invention, terms indicating directions and positional relationships such as "up," "down," "inside," "outside," "left," "right," "front," and "back" are based on the directions and positional relationships shown in the drawings, or the directions and positional relationships that are conventionally used when using the product of the present invention, for the sake of simpler and clearer explanation. They do not teach or suggest that the corresponding apparatus or device has a specific direction, structure, or operation in a specific direction, and are not limitations to the present invention. The present invention will be described in detail below. As shown in Figures 1 to 3, in the manufacturing method of the pump-internal magnet device 100 of the present invention, the pump-internal magnet device 100 is applied to a canned motor pump 1. The canned motor pump 1 further includes a base 101, a fixed seat 102 fitted inside the base 101, a pump front cover 103 attached to one side of the base 101, a pump rear cover 104 attached to the opposite side of the base 101, a housing 105 mounted inside the base 101, a stator 106 mounted between the housing 105 and the fixed seat 102, a shaft unit 107 mounted inside the housing 105, a bearing unit 108, and an impeller 109. The internal magnet device 100 of the pump is mounted inside the housing 105, supported by the shaft unit 107. The impeller 109 is connected to the internal magnet device 100 of the pump, and the bearing 108 is fitted between the internal magnet device 100 and the shaft unit 107. In one embodiment, the manufacturing method of the pump-internal magnet device 100 of the present invention includes the following steps. Process A: Prepare the injection mold 2 (see Figure 4), the hot press equipment 3 (see Figure 6), the magnet unit 10, and the base unit 30. In this embodiment, the base unit 30 is made of a plastic material. As shown in Figure 4, the injection mold 2 has a mold hole 201 and includes an ejector pin unit 202 fixed inside the mold hole 201. As shown in Figures 4 and 5, the protruding pin unit 202 comprises a base plate 203, a protruding portion 204 connected to the base plate 203, a plurality of protruding pins 205 connected to the protrudin