Special-shaped die for neodymium-iron-boron permanent magnet

Abstract

The utility model provides a neodymium iron boron permanent magnet special-shaped mold which comprises a machining table, supporting legs, a lower mold, a through hole, a vertical rod, a top plate, a lower injection molding cavity, a first telescopic push rod, an upper mold, an upper injection molding cavity, an injection molding pipe, a first cooling cavity, a first liquid inlet pipe, a first liquid outlet pipe, a first control valve, a first stirring module and a second cooling cavity. A second liquid inlet pipe, a second liquid outlet pipe, a second control valve and a second stirring module. According to the special-shaped mold for the neodymium-iron-boron permanent magnet, the basic requirement for forming and processing the permanent magnet can be met, and the cooling liquid in the cooling cavity can be stirred through the stirring structure, so that the temperature of the cooling liquid in the cooling cavity is kept balanced; according to the cooling device, the temperature of the cooling liquid can be accurately detected by a user, so that the cooling liquid in the cooling cavity is timely discharged and replaced, the cooling effect of the cooling liquid is fully exerted, and waste of the cooling liquid is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet processing, in particular to a special-shaped mold for a neodymium iron boron permanent magnet. Background Art

[0002] In the process of producing permanent magnets, it is necessary to overlap the upper mold and the lower mold, fill the raw materials in the injection molding chamber through the injection molding tube, and cool the injection molding chamber through the coolant to perform the molding process, and then take the molded permanent magnet out of the mold. Although the existing special-shaped molds of NdFeB permanent magnets can meet the basic needs of cooling and molding the raw materials, the device usually does not have a stirring structure for stirring the coolant during operation, which will cause the temperature of the coolant in different areas to be different, that is, the temperature of the coolant far away from the raw materials is usually lower than the temperature of the coolant close to the raw materials, so the cooling effect of the coolant cannot be quickly and fully exerted, and the user cannot accurately detect the temperature of the coolant, which easily makes it difficult for the user to accurately grasp the time to replace the coolant, so it will bring great inconvenience to people's use.

[0003] For example, the utility model with announcement number CN 220232918 U discloses a special-shaped mold for neodymium iron boron permanent magnets. In the technical solution of this patent, coolant is introduced into the cooling chamber to cool the raw materials in the injection molding chamber, but there is no stirring structure for stirring the coolant in the cooling chamber. As a result, the temperatures of the coolant in different areas of the cooling chamber are different, so that the cooling effect of the coolant cannot be quickly and fully exerted and is discharged from the cooling chamber, which easily causes a waste of the cooling effect of the coolant and brings great inconvenience to people's use. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art and provides a special-shaped mold for NdFeB permanent magnets, which can not only meet the basic requirements for molding and processing of permanent magnets, but also can stir the coolant in the cooling chamber through a stirring structure, so that the temperature of the coolant in the cooling chamber remains balanced, allowing the user to accurately detect the temperature of the coolant, thereby discharging the coolant in the cooling chamber in time and replacing it, thereby fully exerting the cooling effect of the coolant and avoiding waste of the coolant.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a special-shaped mold for neodymium iron boron permanent magnets, including a processing table, a supporting leg is arranged at the bottom of the processing table, a lower mold is detachably arranged on the processing table, a through hole matched with the lower mold is arranged on the processing table, a vertical rod is also arranged at the top corner of the processing table, a top plate is arranged on the top of the four vertical rods, a lower injection molding cavity with a top opening is arranged in the lower mold, a first telescopic push rod is vertically arranged on the top plate, an upper mold is detachably arranged on the lower end of the output shaft of the first telescopic push rod, a bottom opening is arranged in the upper mold and is connected to the lower injection molding cavity An upper injection molding cavity, an injection molding tube connected to the injection molding cavity is vertically eccentrically penetrated on the upper mold, a first cooling cavity sleeved on the outer side of the lower injection molding cavity is provided on the lower mold, a first liquid inlet pipe and a first liquid outlet pipe connected to the first cooling cavity are provided at the side end of the lower mold, a first control valve is provided on the first liquid outlet pipe, a first stirring module is provided on the upper mold, a second cooling cavity sleeved on the outer side of the upper injection molding cavity is provided on the upper mold, a second liquid inlet pipe and a second liquid outlet pipe connected to the second cooling cavity are provided at the side end of the upper mold, a second control valve is provided on the second liquid outlet pipe, and a second stirring module is provided on the upper mold.

[0006] As a further improvement of the utility model, the first stirring module includes a plurality of second telescopic push rods vertically arranged at the bottom of the lower mold and the output shafts extending into the first cooling chamber, the bottom of the lower mold is provided with a first through hole adapted to the output shafts of the second telescopic push rods, the upper ends of the output shafts of the plurality of second telescopic push rods are respectively provided with first vertical rods, and a plurality of first stirring rings are commonly provided on the plurality of first vertical rods.

[0007] As a further improvement of the utility model, the second stirring module includes a plurality of third telescopic push rods vertically arranged at the bottom of the lower mold and the output shafts extending into the second cooling chamber, the bottom of the lower mold is provided with a second through hole adapted to the output shafts of the third telescopic push rods, the upper ends of the output shafts of the plurality of third telescopic push rods are respectively provided with second vertical rods, and a plurality of second stirring rings are commonly provided on the plurality of second vertical rods.

[0008] As a further improvement of the present invention, a plurality of first temperature sensors extending into the first cooling cavity are also arranged on the lower mold.

[0009] As a further improvement of the utility model, a plurality of second temperature sensors extending into the second cooling cavity are also arranged on the upper mold.

[0010] As a further improvement of the utility model, a fixing plate is provided at the bottom side end of the lower mold, and fixing bolts for threadedly fixing with the processing table are provided on the fixing plate, and threaded fixing holes matching with the fixing bolts are provided on the processing table.

[0011] As a further improvement of the utility model, a connecting tube is provided at the top of the upper mold, which is clamped and fixed with the output shaft of the first telescopic push rod. The connecting tube is provided with a connecting bolt for connecting and fixing the output shaft of the first telescopic push rod. The output shaft of the first telescopic push rod is provided with a threaded connecting hole that is compatible with the connecting bolt.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] First, the user can use multiple first telescopic push rods to move the upper mold downward and fix it to the lower mold. Then, a sufficient amount of coolant can be added to the first cooling cavity through the first liquid inlet pipe and a sufficient amount of coolant can be added to the second cooling cavity through the second liquid inlet pipe. Then, the raw material can be injected into the upper injection molding cavity through the injection molding tube so that the raw material fills the lower injection molding cavity and the upper injection molding cavity. At this time, the raw material in the corresponding lower injection molding cavity area can be cooled by the coolant in the first cooling cavity, and the raw material in the corresponding upper injection molding cavity area can be cooled by the coolant in the second cooling cavity. At the same time, the coolant in the first cooling cavity can be stirred by multiple second telescopic push rods, the first vertical rod, and the first stirring ring, and the coolant in the second cooling cavity can be stirred by multiple third telescopic push rods, the second vertical rod, and the second stirring ring. The upper coolant in the first cooling chamber can fully cool the raw materials in the lower injection molding chamber area, and the upper coolant in the second cooling chamber can fully cool the raw materials in the upper injection molding chamber area, so that the temperature of the coolant is balanced and the cooling effect of the liquid is fully exerted; after the cooling and molding of the raw materials is completed, the upper mold and the lower mold can be separated by multiple first telescopic push rods, and then the formed permanent magnet can be taken away; the coolant in the first cooling chamber can be discharged through the first liquid outlet pipe by simply opening the first control valve, and then new coolant can be added to the first cooling chamber through the first liquid inlet pipe; the coolant in the second cooling chamber can be discharged through the second liquid outlet pipe by simply opening the second control valve, and then new coolant can be added to the second cooling chamber through the second liquid inlet pipe.

[0014] Secondly, through multiple first temperature sensors, the temperature of the coolant in the first cooling chamber can be conveniently monitored, so that the coolant in the first cooling chamber can be replaced in time; through multiple second temperature sensors, the temperature of the coolant in the second cooling chamber can be conveniently monitored, so that the coolant in the second cooling chamber can be replaced in time.

[0015] Thirdly, the lower mold and the processing table can be flexibly fixed by only passing the fixing bolts through the side wall of the fixing plate and screwing them into the threaded fixing holes.

[0016] Fourthly, the output shaft of the first telescopic push rod can be flexibly fixed to the upper mold by simply clamping the connecting tube and the output shaft of the first telescopic push rod, and then passing the connecting bolt through the side wall of the connecting tube and screwing it to the threaded connection hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a front view structural schematic diagram of the utility model;

[0019] Figure 2 It is a side view structural schematic diagram of the utility model;

[0020] Figure 3 It is a partial side cross-sectional structural schematic diagram of the utility model;

[0021] Figure 4 It is a partial front view cross-sectional structural schematic diagram of the utility model.

[0022] In the figure: 101, processing table; 102, supporting leg; 103, lower mold; 104, through hole; 105, vertical rod; 106, top plate; 107, lower injection cavity; 108, first telescopic push rod; 109, upper mold; 110, upper injection cavity; 111, injection tube; 112, first cooling cavity; 113, first liquid inlet pipe; 114, first liquid outlet pipe; 115, first control valve; 116, second cooling cavity; 11 7. Second liquid inlet pipe; 118. Second liquid outlet pipe; 119. Second control valve; 120. First temperature sensor; 121. Second temperature sensor; 201. Second telescopic push rod; 202. First vertical rod; 203. First stirring ring; 301. Third telescopic push rod; 302. Second vertical rod; 303. Second stirring ring; 401. Fixed plate; 402. Fixed bolt; 403. Connecting tube; 404. Connecting bolt. DETAILED DESCRIPTION

[0023] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0024] like Figure 1 , 2As shown in Figures 3 and 4, a special-shaped mold for a neodymium iron boron permanent magnet comprises a processing table 101, a supporting leg 102 is arranged at the bottom of the processing table 101, a lower mold 103 is detachably arranged on the processing table 101, a through hole 104 adapted to the lower mold 103 is arranged on the processing table 101, a vertical rod 105 is further arranged at the top corner of the processing table 101, a top plate 106 is commonly arranged at the top of the four vertical rods 105, a lower injection molding cavity 107 with a top opening is arranged in the lower mold 103, a first telescopic push rod 108 is vertically arranged on the top plate 106, an upper mold 109 is detachably arranged at the lower end of the output shaft of the first telescopic push rod 108, an upper injection molding cavity 110 with a bottom opening and connected to the lower injection molding cavity 107 is arranged in the upper mold 109, and the upper mold 110 is provided with an upper injection molding cavity 110 with a bottom opening and connected to the lower injection molding cavity 107. 09 is provided with an injection tube 111 connected to the injection chamber vertically eccentrically penetrating therethrough, the lower mold 103 is provided with a first cooling chamber 112 sleeved on the outside of the lower injection chamber 107, the side end of the lower mold 103 is provided with a first liquid inlet pipe 113 and a first liquid outlet pipe 114 connected to the first cooling chamber 112, the first liquid outlet pipe 114 is provided with a first control valve 115, the upper mold 109 is provided with a first stirring module, the upper mold 109 is provided with a second cooling chamber 116 sleeved on the outside of the upper injection chamber 110, the side end of the upper mold 109 is provided with a second liquid inlet pipe 117 and a second liquid outlet pipe 118 connected to the second cooling chamber 116, the second liquid outlet pipe 118 is provided with a second control valve 119, and the upper mold 109 is provided with a second stirring module.

[0025] like Figure 1 , 2 As shown in Figures 3 and 4, the first stirring module includes a plurality of second telescopic push rods 201 which are vertically arranged at the bottom of the lower mold 103 and whose output shafts extend into the first cooling chamber 112. A first through hole which is adapted to the output shaft of the second telescopic push rod 201 is arranged at the bottom of the lower mold 103. The upper ends of the output shafts of the plurality of second telescopic push rods 201 are respectively provided with first vertical rods 202105, and a plurality of first stirring rings 203 are commonly arranged on the plurality of first vertical rods 202105.

[0026] like Figure 1 , 2 As shown in Figures 3 and 4, the second stirring module includes a plurality of third telescopic push rods 301 which are vertically arranged at the bottom of the lower mold 103 and whose output shafts extend into the second cooling chamber 116. A second through hole which is adapted to the output shaft of the third telescopic push rod 301 is arranged at the bottom of the lower mold 103. Second vertical rods 302105 are respectively arranged at the upper ends of the output shafts of the plurality of third telescopic push rods 301, and a plurality of second stirring rings 303 are commonly arranged on the plurality of second vertical rods 302105.

[0027] like Figure 1 , 2As shown in FIGS. 3 and 4 , the lower mold 103 is also provided with a plurality of first temperature sensors 120 extending into the first cooling cavity 112 .

[0028] like Figure 1 , 2 As shown in FIGS. 3 and 4 , the upper mold 109 is also provided with a plurality of second temperature sensors 121 extending into the second cooling cavity 116 .

[0029] like Figure 1 , 4 As shown, a fixing plate 401 is provided at the bottom side of the lower mold, and a fixing bolt 402 for screwing and fixing with the processing table 101 is provided on the fixing plate 401, and a threaded fixing hole matching with the fixing bolt 402 is provided on the processing table 101. The lower mold 103 and the processing table 101 can be flexibly fixed by passing the fixing bolt 402 through the side wall of the fixing plate 401 and screwing and fixing with the threaded fixing hole.

[0030] like Figure 1 As shown, a connecting cylinder 403 is provided at the top of the upper mold 109 to be clamped and fixed with the output shaft of the first telescopic push rod 108, a connecting bolt 404 is provided on the connecting cylinder 403 to connect and fix the output shaft of the first telescopic push rod 108, and a threaded connection hole is provided on the output shaft of the first telescopic push rod 108 to match the connecting bolt 404. The output shaft of the first telescopic push rod 108 and the upper mold 109 can be flexibly fixed by clamping and fixing the connecting cylinder 403 and the output shaft of the first telescopic push rod 108, and then passing the connecting bolt 404 through the side wall of the connecting cylinder 403 and screwing and fixing it with the threaded connection hole.

[0031] The user can extend the output shafts of the multiple first telescopic push rods 108 downward by a certain length, so that the upper mold 109 moves downward and contacts and is fixed together with the lower mold 103, and then a sufficient amount of coolant can be added to the first cooling cavity 112 through the first liquid inlet pipe 113, and a sufficient amount of coolant can be added to the second cooling cavity 116 through the second liquid inlet pipe 117. Then, the raw material can be injected into the upper injection cavity 110 through the injection tube 111, so that the raw material fills the lower injection cavity 107 and the upper injection cavity 110. At this time, the raw material in the corresponding lower injection cavity 107 area can be cooled by the coolant in the first cooling cavity 112, and the raw material in the corresponding upper injection cavity 110 area can be cooled by the coolant in the second cooling cavity 116. At the same time, the output shafts of the plurality of second telescopic push rods 201 can be repeatedly extended and retracted, so that the first vertical rod 202105 and the first stirring ring 203 stir the coolant in the first cooling cavity 112. At the same time, the output shafts of the plurality of third telescopic push rods 301 can be repeatedly extended and retracted, so that the second vertical rod 302105 and the second stirring ring 303 stir the coolant in the second cooling cavity 116, so that the upper coolant in the first cooling cavity 112 can fully cool the raw materials in the lower injection molding cavity 107 area, and the upper coolant in the second cooling cavity 116 can fully cool the raw materials in the upper injection molding cavity 110 area, so that the temperature of the coolant is balanced and the cooling effect of the liquid is fully exerted.

[0032] After the cooling and molding process of the raw material is completed, the output shafts of the plurality of first telescopic push rods 108 can be synchronously shortened upward by a certain length, so that the upper mold 109 moves upward and separates from the lower mold 103, and then the molded permanent magnet can be taken away.

[0033] The user can conveniently monitor the temperature of the coolant in the first cooling chamber 112 through the multiple first temperature sensors 120, so as to replace the coolant in the first cooling chamber 112 in time, and only needs to open the first control valve 115 to discharge the coolant in the first cooling chamber 112 through the first liquid outlet pipe 114, and then add new coolant to the first cooling chamber 112 through the first liquid inlet pipe 113; the user can conveniently monitor the temperature of the coolant in the second cooling chamber 116 through the multiple second temperature sensors 121, so as to replace the coolant in the second cooling chamber 116 in time, and only needs to open the second control valve 119 to discharge the coolant in the second cooling chamber 116 through the second liquid outlet pipe 118, and then add new coolant to the second cooling chamber 116 through the second liquid inlet pipe 117.

[0034] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A special-shaped mold for a neodymium iron boron permanent magnet, comprising a processing table (101), wherein a support leg (102) is provided at the bottom of the processing table (101), characterized in that: The processing table (101) is detachably provided with a lower mold (103), and a through hole (104) matched with the lower mold (103) is provided on the processing table (101). A vertical rod (105) is also provided at the top corner of the processing table (101), and a top plate (106) is commonly provided on the top of the four vertical rods (105). A lower injection molding cavity (107) with a top opening is provided in the lower mold (103), and a first telescopic push rod (108) is vertically provided on the top plate (106). An upper mold (109) is detachably provided at the lower end of the output shaft of the first telescopic push rod (108), and an upper injection molding cavity (110) with a bottom opening and connected to the lower injection molding cavity (107) is provided in the upper mold (109). An injection molding tube (111) connected to the injection molding cavity is vertically eccentrically provided through the upper mold (109). 111), a first cooling cavity (112) sleeved on the outside of a lower injection cavity (107) is provided on the lower mold (103), a first liquid inlet pipe (113) and a first liquid outlet pipe (114) connected to the first cooling cavity (112) are provided at the side end of the lower mold (103), a first control valve (115) is provided on the first liquid outlet pipe (114), a first stirring module is provided on the upper mold (109), a second cooling cavity (116) sleeved on the outside of an upper injection cavity (110) is provided on the upper mold (109), a second liquid inlet pipe (117) and a second liquid outlet pipe (118) connected to the second cooling cavity (116) are provided at the side end of the upper mold (109), a second control valve (119) is provided on the second liquid outlet pipe (118), and a second stirring module is provided on the upper mold (109).

2. The NdFeB permanent magnet special-shaped mold according to claim 1, characterized in that: The first stirring module comprises a plurality of second telescopic push rods (201) vertically arranged at the bottom of the lower mold (103) and the output shafts extending into the first cooling chamber (112); a first through hole adapted to the output shafts of the second telescopic push rods (201) is arranged at the bottom of the lower mold (103); the upper ends of the output shafts of the plurality of second telescopic push rods (201) are respectively provided with first vertical rods (202)(105); and a plurality of first stirring rings (203) are commonly provided on the plurality of first vertical rods (202)(105).

3. The NdFeB permanent magnet special-shaped mold according to claim 2, characterized in that: The second stirring module comprises a plurality of third telescopic push rods (301) vertically arranged at the bottom of the lower mold (103) and the output shafts extending into the second cooling chamber (116); a second through hole adapted to the output shafts of the third telescopic push rods (301) is arranged at the bottom of the lower mold (103); second vertical rods (302)(105) are respectively arranged at the upper ends of the output shafts of the plurality of third telescopic push rods (301); and a plurality of second stirring rings (303) are commonly arranged on the plurality of second vertical rods (302)(105).

4. The NdFeB permanent magnet special-shaped mold according to claim 3, characterized in that: The lower mold (103) is also provided with a plurality of first temperature sensors (120) extending into the first cooling cavity (112).

5. The NdFeB permanent magnet special-shaped mold according to claim 4, characterized in that: The upper mold (109) is also provided with a plurality of second temperature sensors (121) extending into the second cooling cavity (116).

6. The NdFeB permanent magnet special-shaped mold according to claim 5, characterized in that: A fixing plate (401) is provided at the bottom side end of the lower mold, and a fixing bolt (402) for screwing and fixing with the processing table (101) is provided on the fixing plate (401), and a threaded fixing hole matched with the fixing bolt (402) is provided on the processing table (101).

7. The NdFeB permanent magnet special-shaped mold according to claim 6, characterized in that: A connecting tube (403) is provided at the top of the upper mold (109) and is fixedly connected to the output shaft of the first telescopic push rod (108). A connecting bolt (404) is provided on the connecting tube (403) for connecting and fixing the output shaft of the first telescopic push rod (108). A threaded connecting hole that is compatible with the connecting bolt (404) is provided on the output shaft of the first telescopic push rod (108).

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