Search

KR-20260064926-A - METHOD FOR MANUFACTURING A MAGNET DEVICE OF A PUMP

KR20260064926AKR 20260064926 AKR20260064926 AKR 20260064926AKR-20260064926-A

Abstract

A method for manufacturing a magnet device within a pump is provided. A process for preparing a base unit (30) composed of an injection mold, a hot press facility, a magnet unit (10), and a plastic material, comprising: process A, in which a protruding pin unit is fixed within the injection mold; process B, in which the magnet unit (10) is installed within the injection mold so that the magnet unit (10) is supported and positioned by the protruding pin unit; process C, in which the plastic material is injected into the injection mold to form a containment unit (20) that encloses the outside of the magnet unit (10) and a part of the protruding pin unit; process D, in which an intermediate product is removed after cooling; and process E, in which the base unit (30) is installed in the intermediate product and placed within the hot press facility to perform heating and pressing, thereby heat-bonding the base unit (30) to the intermediate product to obtain a magnet device inside the pump.

Inventors

  • 팅-차이 황

Assignees

  • 지이 일렉트리컬 엔지니어링 컴퍼니., 리미티드.

Dates

Publication Date
20260508
Application Date
20241030

Claims (6)

  1. A process for preparing an injection mold, a hot press equipment, a magnet unit, and a base unit composed of a plastic material, wherein the injection mold comprises a mold hole that is open and a protruding pin unit fixed within the mold hole, and Process B, wherein the injection mold is opened, the magnet unit is installed within the mold hole of the injection mold so that the magnet unit is supported and positioned by the protruding pin unit, and the injection mold is closed from the open state. Process C, in which a plastic material is injected into the mold hole of the injection mold to form an encapsulating unit that encloses a part of the protruding pin unit and the outside of the magnet unit, and After cooling, process D, which turns the injection mold from the closed state to the open state and extracts an intermediate product having an inner coupling area formed by the protruding pin unit from the mold hole, and A method for manufacturing a magnet device inside a pump, characterized by including process E, in which the base unit is installed in the inner bonding area of the intermediate product and is also placed in the hot press facility to perform heating and pressing, thereby thermally bonding the base unit to the inner bonding area of the intermediate product to obtain a magnet device inside a pump.
  2. In paragraph 1, In the above process A, the base unit includes a bottom plate and an outer coupling area installed on the bottom plate, and The above outer joining region has an external joining member connected to the bottom plate, and an annular protrusion connected to the bottom plate and surrounding the outer circumference of the external joining member. In the above process D, the inner bonding region of the obtained intermediate product has a bottom end surface, a concave lower portion installed concavely on the bottom end surface, an inner annular bonding member installed convexly in the concave lower portion, and an outer sealing annular portion installed convexly on the concave lower portion and also surrounding the outer circumference of the inner annular bonding member. A method for manufacturing a magnet device in a pump, characterized in that, in the above process E, the bottom plate of the base unit is brought into contact with the bottom end surface, the annular protrusion 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 paragraph 2, In the above process A, the protruding pin unit comprises a base plate, a protrusion connected to the base plate, a plurality of protruding pins connected to the protrusion, an outer convex rib connected to the protrusion and surrounding the outer circumference of the plurality of protruding pins, an inner convex rib installed on the inner side of the plurality of protruding pins, and an annular block installed between the outer convex rib and the inner convex rib. Each of the above protruding pins is formed in a column shape, and An annular region is formed between the annular block and the inner convex rib, and The annular region has an annular section surrounding the outer circumference of the inner convex rib, and a plurality of circular sections communicating with the annular section and also surrounding the outer circumference of each corresponding protruding pin. The external joint member of the above base unit has an external portion and a plurality of external positioning rings installed with a gap between them and connected to the external portion. In the above process D, the inner ring-shaped joining member of the intermediate product obtained has an inner ring portion whose position corresponds to the outer ring portion, and a plurality of inner positioning rings that are installed with a gap between them and are also connected to the inner ring portion (219'). The positions of the plurality of inner positioning rings each correspond to the plurality of outer positioning rings, and also Each inner surface of the plurality of inner positioning rings forms each of a plurality of concave lower holes, and A method for manufacturing a magnet device in a pump, characterized in that, in the above process E, the outer portion of the base unit is brought into contact with the inner portion, and the plurality of outer positioning rings of the base unit are brought into contact with the plurality of inner positioning rings.
  4. In paragraph 1, A method for manufacturing a magnet device in a pump, characterized in that, in the above process E, the heating temperature is at most 300℃.
  5. In paragraph 1, A method for manufacturing a magnet device in a pump, characterized in that, in the above process E, the melting depth of the press is within the range of 0.5 mm to 1 mm.
  6. In paragraph 1, A method for manufacturing a magnet device in a pump, characterized in that, in the above process A, the constituent material of the base unit is polypropylene, polyvinylidene fluoride, or carbon fiber-filled ethylene tetrafluoroethylene copolymer.

Description

Method for manufacturing a magnet device of a pump The present 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 comprising 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 surrounding the metal internal magnet member from the outside. The plastic layer is formed by injection molding to surround the entire internal metal magnet member. FIG. 1 is a block diagram showing one embodiment of the method for manufacturing a magnet device in a pump according to the present invention. FIG. 2 is a cross-sectional view showing the application of a magnet device inside a pump manufactured according to the above embodiment to a canned motor pump. FIG. 3 is an exploded view of the parts showing the application of the magnet device inside the pump manufactured according to the above embodiment to a canned motor pump. FIG. 4 is a drawing showing the injection molding of the above embodiment. Figure 5 is a cross-sectional view of line VV of Figure 4. FIG. 6 is a drawing showing the hot melt of the above embodiment. FIG. 7 is a drawing showing a press of the above embodiment. FIG. 8 is a cross-sectional view showing a magnet device inside a pump manufactured according to the above embodiment. Figure 9 is a cross-sectional view of line IX-IX of Figure 8. FIG. 10 is an exploded view of the parts showing a magnet device inside a pump manufactured according to the above embodiment. To more clearly explain the purpose, technical means, and advantages of the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly explained below in combination with the accompanying drawings. It will be apparent that the described embodiments are some embodiments of the present invention and not all embodiments. Typically, parts of the embodiments of the present invention depicted or illustrated in the accompanying drawings may be arranged and designed in various different configurations. Accordingly, the detailed description of the embodiments of the present invention provided in the accompanying drawings below does not constitute any limitation on the scope of protection of the present invention and merely represents selected embodiments of the present invention. Before describing the invention in more detail, it should be noted that, where deemed appropriate, reference numerals or terminal portions of reference numerals are repeated between the drawings to indicate corresponding or similar elements, and these may have any identical characteristics. In the description of the present invention, terms indicating orientation and positional relationships such as "up," "down," "inside," "outside," "left," "right," "front," and "back" are based on orientation and positional relationships depicted in drawings or habitually arranged when using the product of the present invention for a simpler and clearer explanation. They do not teach or suggest that the corresponding device or apparatus has a specific orientation, structure, or operation in a specific orientation, and do not constitute a limitation to the present invention. The present invention will be described in detail below. As illustrated in FIGS. 1 to 3, in the method for manufacturing a magnet device (100) within a pump according to the present invention, the magnet device (100) within the pump is applied to a canned motor pump (1). The canned motor pump (1) further comprises a base (101), a fixed seat (102) fitted inside the base (101), a pump front cover (103) mounted on one side of the base (101), a pump rear cover (104) mounted on 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 shaft support unit (108), and an impeller (109). The magnet device (100) inside the pump is supported by the shaft unit (107) and mounted inside the housing (105). The impeller (109) is connected to the magnet device (100) inside the pump, and the bearing (108) is installed by being sandwiched between the magnet device (100) inside the pump and the shaft unit (107). The method for manufacturing a magnet device (100) in a pump according to the present invention comprises the following process in one embodiment. Process A: Prepare an injection mold (2) (see FIG. 4), a hot press equipment (3) (see FIG. 6), a magnet unit (10), and a base unit (30). In this embodiment, the base unit (30) is made of plastic material. As shown in FIG. 4, the injection mold (2) has an open mold hole (201) and also includes a protruding pin unit (202) fixed inside the mold hole (201). As illustrated in FIGS. 4 and 5, the protruding pin unit