Injection mold and injection molding magnet

By setting an arc-shaped bonding groove on the surface of the injection molded magnet, the problem of insufficient bonding force between the injection molded magnet and the external plastic body is solved, the bonding strength is improved, sliding is prevented, and the stability and overall performance of the workpiece are ensured.

CN222328937UActive Publication Date: 2025-01-10JIANGMEN & PARTNERS MAGNETIC PROD CO LTD
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Patent Information

Application Number
CN202323579520.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2025-01-10
Estimated Expiration
2033-12-26

AI Technical Summary

Technical Problem

The smooth surface of the injection molded magnet leads to insufficient binding force with the external plastic body, resulting in relatively dislocation and sliding problems, affecting the actual application effect of the workpiece.

Method used

An injection molded magnet and an injection mold with a bonding groove are designed. Several arc-shaped bonding grooves are provided along the thickness direction of the injection molded magnet to enhance the friction with the external plastic material, ensure that it is embedded in the groove, thereby improving the bonding strength.

Benefits of technology

By increasing friction and contact surface area, the bonding performance of the injection molded magnet and external plastic material is enhanced, preventing sliding, and ensuring the stability and overall performance of the workpiece in practical applications.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an injection mold and an injection molding magnet. The injection molding magnet is provided with a first surface and a second surface which are opposite to each other along the thickness direction of the injection molding magnet; the first surface of the injection molding magnet is provided with a plurality of combination grooves. The injection molding magnet is formed by injection molding through an injection mold, and the injection mold comprises a top clamping plate, a bottom clamping plate, a front mold plate, a rear mold plate, a mold cavity and a mold core. Wherein the front mold plate is mounted on the bottom surface of the top clamping plate, and the rear mold plate is mounted on the top surface of the bottom clamping plate; the front mold plate is arranged right above the rear mold plate; the cavity is formed in the front mold plate; the mold core is arranged on the rear mold plate; and an accommodating cavity formed by combining the mold cavity and the mold core is matched with the injection molding magnet in shape. According to the utility model, the technical defect of failure of the workpiece in practical application caused by the possible relative dislocation and sliding between the plastic body and the injection molding magnet in the use process of the workpiece formed by injection molding of the traditional injection molding magnet is overcome.
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Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding, and in particular relates to an injection molding mold and an injection molding magnet. Background Art

[0002] Injection molded magnets are a type of magnetic material products produced through the injection molding process, usually with a specific shape and magnetic properties as the target. These magnets are widely used in many industrial fields, such as motors, sensors, medical devices, etc. The preparation process of injection molded magnets involves injecting magnetic materials into a mold of a specific shape through an injection molding machine, followed by cooling and solidification, and finally forming a finished product with specific magnetic properties.

[0003] In some fields, it is necessary to inject a layer of plastic body on the injection molded magnet to form a special workpiece to meet the actual working conditions. However, due to the smooth surface of the injection molded magnet, the plastic body and the injection molded magnet may slide relative to each other during use, causing the workpiece to fail in actual application. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide an injection mold and an injection molded magnet.

[0005] In order to solve the above problems, the utility model is implemented according to the following technical solutions:

[0006] The utility model provides an injection-molded magnet, which has a first surface and a second surface opposite to each other along its thickness direction; the first surface of the injection-molded magnet has a plurality of coupling grooves, and the thickness of the injection-molded magnet (1) is 2.48 mm to 2.55 mm; the injection-molded magnet is injection-molded in a mold.

[0007] Preferably, the injection-molded magnet is annular, the coupling groove is arc-shaped, and a discontinuity is provided between adjacent coupling grooves.

[0008] Preferably, the injection-molded magnet has four coupling grooves.

[0009] Preferably, the coupling grooves are evenly distributed on the first surface of the injection-molded magnet.

[0010] The utility model also provides an injection mold, which is used for injection molding of the injection-molded magnet of the utility model.

[0011] Preferably, the injection mold comprises a top clamping plate, a bottom clamping plate, a front template, a rear template, a cavity and a core;

[0012] Among them, the front template is installed on the bottom surface of the top clamping plate, and the rear template is installed on the top surface of the bottom clamping plate; the front template is directly above the rear template; the cavity is arranged on the front template; the core is arranged on the rear template; the accommodating cavity formed by the combination of the cavity and the core is adapted to the shape of the injection molded magnet.

[0013] Preferably, four cavities are arranged on the front template, and four cores are correspondingly arranged on the rear template.

[0014] Preferably, the injection mold also includes a casting assembly, which includes a main runner, a branch runner and a runner plate; the runner plate is connected to the outlet of the main runner, and the runner plate is connected to the inlet of the branch runner; the branch runner includes a gate, and the gate is connected to the cavity; wherein the outer wall of the main runner is wrapped with a main pouring sleeve, and the outer wall of the branch runner is wrapped with a branch pouring sleeve.

[0015] Preferably, the injection mold further comprises an ejector assembly, which comprises an ejector base plate, an ejector panel and an ejector pin; the ejector pin is mounted on the ejector base plate, and the ejector pin passes through the ejector panel and is connected to the cavity.

[0016] Preferably, the injection mold also includes a reset assembly and a guide assembly, the reset assembly includes a reset rod and a reset spring, the reset spring is sleeved on the reset rod, and the reset rod is connected to the bottom clamp; the positioning assembly includes a guide column and a guide sleeve, the guide column is fixedly set on the rear template, the guide sleeve is fixedly set on the front template, and the guide column is adapted to be inserted into the guide sleeve.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the injection-molded magnet provided by the utility model has a first surface and a second surface relative to each other along its thickness direction; the first surface of the injection-molded magnet has a plurality of coupling grooves, and the thickness of the injection-molded magnet (1) is 2.48 mm to 2.55 mm; the injection-molded magnet (1) is injection-molded in a mold. The injection-molded magnet can be injection-molded together with an external injection molding material, and the external injection molding material can be embedded in the coupling groove of the injection-molded magnet. This allows the external injection molding material to be firmly combined with the injection-molded magnet. The utility model also provides a mold for injection molding the injection-molded magnet. The design of the injection mold makes the accommodating cavity formed after the cavity and the core are combined to match the shape of the injection-molded magnet, which is beneficial to the injection molding of the magnet. At the same time, the arrangement of the casting assembly, the ejection assembly, the reset assembly and the guide assembly makes the entire injection molding process smoother and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 It is a side view structural schematic diagram of an injection-molded magnet in an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of an injection-molded magnet in an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of an injection mold in the utility model;

[0022] Figure 4 It is a top view of an injection mold in the utility model;

[0023] Figure 5 This is a bottom view of an injection mold in the utility model

[0024] In the figure:

[0025] 1-injection molded magnet; 10-first surface, 11-combination groove, 12-intermittent portion, 20-second surface;

[0026] 2-Injection mold;

[0027] 30-top splint;

[0028] 40- bottom splint;

[0029] 50-front template, 51-mold cavity, 52-main channel, 53-flow channel plate, 54-dividing channel;

[0030] 60-rear template, 61-core, 62-ejection base plate, 63-ejection panel, 64-ejector pin, 65-reset rod, 66-reset spring, 67-guide column, 68-guide sleeve;

[0031] 70-Scraper plate. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings:

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have specific directions, be constructed and operated in specific directions. Therefore, they cannot be understood as limitations on the present invention.

[0035] The applicant found that when the applicant conducted in-depth research on the production process of injection molded magnets, through field investigations, exchanges with industry experts and analysis of actual application cases, they discovered the problem of insufficient bonding between injection molded magnets and external plastic bodies. They realized that the key to solving this problem is to improve the bonding between injection molded magnets and external plastic bodies to prevent sliding in actual applications.

[0036] After systematic research and experiments, the applicant found that setting a bonding groove on the surface of the injection-molded magnet can effectively increase the friction on the magnet surface, thereby improving the bonding force between the injection-molded magnet and the external plastic body. Based on this discovery, they designed an injection-molded magnet with a bonding groove and an injection mold that can efficiently produce the injection-molded magnet.

[0037] like Figure 1-2 As shown, the utility model provides an injection-molded magnet, wherein the injection-molded magnet 1 has a first surface 10 and a second surface 20 opposite to each other along its thickness direction; the first surface 10 of the injection-molded magnet 1 has a plurality of coupling grooves 11, and the injection-molded magnet 1 is injection-molded in a mold.

[0038] In some scenarios, industrial equipment or products may require special shapes and magnetic properties, and require the external plastic material to be firmly combined with the injection molded magnet 1 to ensure the overall performance of the workpiece. The provision of the bonding groove 11 can increase the contact surface area between the external plastic material and the injection molded magnet 1, allowing the external injection molded material to be embedded in the injection molded magnet 1, thereby enhancing the bonding performance between the injection molded magnet 1 and the external injection molded material and preventing relative misalignment and sliding.

[0039] More specifically, the thickness of the injection molded magnet 1 is 2.48 mm to 2.55 mm. Controlling the thickness range of the injection molded magnet 1 helps ensure the stability of the product during manufacturing and use. Consistent thickness can improve the structural consistency of the product and reduce the risk of deformation or distortion.

[0040] In a preferred embodiment, the injection-molded magnet 1 is a magnetic ring, the injection-molded magnet 1 is annular, the coupling grooves 11 are arc-shaped coupling grooves, and discontinuities 12 are provided between adjacent coupling grooves 11 .

[0041] Specifically, the angle range of the discontinuity 12 of the injection-molded magnet 1 on the surface of the magnetic ring is 4 degrees to 10 degrees, and the outer diameter of the annular injection-molded magnet 1 is 40 mm. The arc-shaped coupling groove 11 can increase the coupling area, thereby improving the coupling strength between the external injection molding material and the injection-molded magnet 1. The angle of the discontinuity 12 may affect the coupling performance of the magnet with the new injection molding part. A smaller angle will provide a larger embedding space for the external injection molding material, while a larger angle may leave less embedding space for the external injection molding material in the coupling part. By providing the discontinuity 12 between the coupling grooves 11, the relative sliding of the injection molding body and the injection molding magnet 1 in the direction of the coupling groove 11 is effectively prevented, thereby ensuring the firmness of the coupling between the two.

[0042] In a preferred embodiment, the number of the coupling grooves 11 of the injection molded magnet 1 is 4. Compared with 2 coupling grooves 11, 4 coupling grooves 11 can provide more surface area, increase the contact surface between the injection molded magnet 1 and other parts, thereby enhancing the coupling performance, so that the injection molded magnet 1 is more firmly combined with the new injection molding material.

[0043] In a preferred embodiment, the coupling grooves 11 are evenly distributed on the first surface 10 of the injection-molded magnet 1. The arc-shaped coupling grooves 11 are evenly distributed on the first surface 10 to increase the coupling area, thereby improving the coupling strength between the external injection molding material and the injection-molded magnet 1. The even distribution of the coupling grooves 11 helps to form a consistent coupling effect on the entire annular injection-molded magnet 1, thereby increasing the coupling firmness of the workpiece.

[0044] Specifically, the injection-molded magnet 1 provided by the utility model is injection-molded in a mold using magnetic powder material.

[0045] The utility model also provides an injection mold 2 for injection molding the above-mentioned injection-molded magnet 1.

[0046] In a preferred embodiment, the injection mold 2 includes a top clamping plate 30, a bottom clamping plate 40, a front template 50, a rear template 60, a cavity 51 and a core 61; wherein the front template 50 is installed on the bottom surface of the top clamping plate 30, and the rear template 60 is installed on the top surface of the bottom clamping plate 40; the front template 50 is directly above the rear template 60; the cavity 51 is arranged on the front template 50; the core 61 is arranged on the rear template 60; the accommodating cavity formed by the combination of the cavity 51 and the core 61 is adapted to the shape of the injection molded magnet 1.

[0047] The core function of the injection mold 2 is to inject molten plastic into the cavity 51 and form it into the desired magnet shape through the cooling and solidification process. The front template 50 and the rear template 60 of the mold are respectively provided with a cavity 51 and a core 61, which form a receiving cavity after being combined. The molten plastic enters the receiving cavity through the pouring system. As the plastic cools and solidifies, it will fill the receiving cavity and take the shape of the receiving cavity, and finally form the injection molded magnet 1.

[0048] The top clamping plate 30 is the upper half of the injection mold 2 and is used to fix the front template 50 and other top components. In the present invention, the top clamping plate 30 is used to ensure the stability of the front template 50 so as to form the desired shape of the injection molded magnet 1 during the injection molding process.

[0049] The bottom clamping plate 40 is the lower half of the injection mold 2, and is used to fix the rear template 60 and other bottom components. In the utility model, the bottom clamping plate 40 plays a supporting role, ensuring that the rear template 60 remains stable during the injection molding process.

[0050] The front template 50 is provided with a mold cavity 51. In the present invention, the mold cavity 51 on the front template 50 is manufactured according to the design requirements of the injection-molded magnet 1 to form the shape of the injection-molded magnet 1 with a special coupling groove 11.

[0051] The rear template 60 is provided with a core 61. In the present invention, the core 61 on the rear template 60 cooperates with the cavity 51 of the front template 50 to form a receiving cavity to produce an injection-molded magnet 1 with a special coupling groove 11 design.

[0052] In a preferred embodiment, four cavities 51 are arranged on the front template 50 , and four cores 61 are correspondingly arranged on the rear template 60 .

[0053] The four cavities 51 on the front template 50 correspond one to one with the four cores 61 on the rear template 60, and together form a specially shaped receiving cavity for receiving molten plastic. In this way, when the molten plastic is injected into the cavity 51 and cooled and solidified, four injection molded magnets 1 with special coupling grooves 11 can be produced at one time. The precise design and manufacture of the injection mold 2 helps to ensure that the produced magnets have consistent shapes, sizes and coupling groove 11 designs, thereby improving the quality of the product. This design can be adjusted according to actual needs, such as increasing or decreasing the number of cavities 51 and cores 61 to meet different scenarios and production requirements.

[0054] In a preferred embodiment, the injection mold 2 further includes a pouring assembly, which includes a main channel 52, a branch channel 54 and a flow plate 53; the flow plate 53 is connected to the outlet of the main channel 52, and the flow plate 53 is connected to the inlet of the branch channel 54; the branch channel 54 includes a gate, and the gate is connected to the cavity 51; wherein the outer wall of the main channel 52 is wrapped with a main pouring sleeve, and the outer wall of the branch channel 54 is wrapped with a branch pouring sleeve. These components work together to transport the molten plastic from the injection molding machine to the cavity 51 of the mold to achieve the molding of the injection molded magnet 1.

[0055] The main channel 52 is a channel connecting the injection molding machine nozzle and the inside of the mold, and is responsible for conveying the molten plastic from the injection molding machine to the mold. The branch channel 54 distributes the molten plastic in the main channel 52 to each cavity 51. In the utility model, the runner plate 53 is connected to the inlet of the branch channel 54, so that the molten plastic can flow smoothly into the cavity 51. The runner plate 53 connects the outlet of the main channel 52 and the inlet of the branch channel 54, and plays the role of guiding the molten plastic and opening the branch channel 54. The gate is the part where the branch channel 54 connects to the cavity 51, and is responsible for injecting the molten plastic into the cavity 51. The main sprue and the branch sprue are respectively wrapped around the outer walls of the main channel 52 and the branch channel 54, which play a role of heat insulation and protection, prevent heat loss, and ensure that the molten plastic maintains an appropriate temperature during the transportation process.

[0056] Reasonable casting component design helps to ensure that the molten plastic can flow smoothly into the mold cavity 51 during the injection molding process, thereby improving the molding quality of the injection-molded magnet.

[0057] In a preferred embodiment, the injection mold 2 further includes an ejector assembly, which includes an ejector base plate 62 , an ejector panel 63 and an ejector pin 64 ; the ejector pin 64 is mounted on the ejector base plate 62 , and the ejector pin 64 passes through the ejector panel 63 and is connected to the cavity 51 .

[0058] The ejector base plate 62 is the bottom of the ejector assembly and is used to support the other parts of the ejector assembly. The ejector panel 63 is located on the upper part of the ejector base plate 62 and is used to support the ejector pin 64 and transmit the ejection force. The ejector pin 64 is installed on the ejector base plate 62 and is connected to the cavity 51 through the ejector panel 63. After the injection molding process is completed, the ejector pin 64 will move upward to eject the molded injection-molded magnet 1 from the cavity 51.

[0059] The design of the ejector assembly helps ensure that the magnet can be smoothly ejected from the mold cavity 51 after cooling and solidification, thereby improving production efficiency. The precise design and manufacture of the ejector assembly helps ensure that the magnet remains intact during the demolding process, thereby improving the appearance and dimensional accuracy of the product.

[0060] In a preferred embodiment, the injection mold 2 also includes a reset assembly and a guide assembly. The reset assembly includes a reset rod 65 and a reset spring 66. The reset spring 66 is sleeved on the reset rod 65, and the reset rod 65 is connected to the bottom clamp 40; the positioning assembly includes a guide column 67 and a guide sleeve 68. The guide column 67 is fixedly set on the rear template 60, and the guide sleeve 68 is fixedly set on the front template 50. The guide column 67 is adapted to be inserted into the guide sleeve 68.

[0061] The reset assembly in the injection mold 2 ensures that the ejector assembly can be smoothly reset after the injection molding process is completed. At the beginning of the injection molding process, the injection molding machine injects molten plastic into the mold cavity 51 of the mold. At this time, the ejector assembly remains in a contracted state and will not interfere with the plastic filling. After the injection molding process is completed, the product begins to cool and solidify. At this time, the ejector assembly moves upward, driving the reset spring 67 to stretch, and the ejector pin 64 ejects the molded injection magnet 1. In this way, the injection magnet 1 can be smoothly removed from the mold to complete the entire injection molding process. After the magnet is removed, the reset spring 67 contracts, causing the ejector assembly to return to the initial position. At this time, the reset rod 65 is connected to the bottom clamping plate 40 to ensure that the ejector assembly remains in the appropriate position before the next injection molding process begins. When the next injection molding process begins, the ejector assembly has returned to the initial position and will not interfere with the new plastic filling. In this way, the mold can continue to the next injection molding cycle.

[0062] The guide assembly plays a key role in the injection mold 2. It is mainly responsible for ensuring the precise alignment of the front template 50 and the rear template 60 during the opening and closing process of the mold, and maintaining the stability and precision of the mold. When the injection molding machine needs to open the mold to take out the molded magnet, the front template 50 and the rear template 60 need to be separated. At this time, the guide assembly comes into play. The guide post 67 is fixed to the rear template 60, and the guide sleeve 68 is fixed to the front template 50. There is a precise size match between the guide post 67 and the guide sleeve 68 to ensure that they always keep in contact during the opening and closing process of the mold. When the front template 50 and the rear template 60 begin to separate, the guide post 67 slides in the guide sleeve 68. Due to the precise match between the guide post 67 and the guide sleeve 68, this ensures that the front template 50 and the rear template 60 move along a predetermined trajectory during the separation process, avoiding unnecessary wear and misalignment. When the mold needs to be closed for the next injection molding process, the front template 50 and the rear template 60 are re-approached along the opposite trajectory of the opening process. The guide assembly (guide post 67 and guide sleeve 68) continues to function during this process to ensure that the front template 50 and the rear template 60 are accurately aligned.

[0063] In this embodiment, a scraper plate 70 is further provided between the front mold plate 50 and the top clamping plate 30. The main flow channel 52 passes through the scraper plate 70 and is connected to the flow channel plate 53. The scraper plate 70 is connected to the top clamping plate 30 through the scraper plate 70 limiting pins.

[0064] The design of the scraper plate 70 can scrape off excess molten plastic through a reasonable structure, ensuring that only molten plastic that conforms to the shape of the cavity 51 enters the cavity 51, thereby avoiding unnecessary waste and defects. The scraper plate 70 needs to withstand a certain force and pressure during the injection molding process. The connection of the limit pins can enhance the overall stability of the scraper plate 70 and prevent it from generating unnecessary swings or displacements during movement.

[0065] The injection mold 2 also includes a support plate, which is arranged between the ejection panel 63 and the rear template 60. Its main function is to provide support and stability for the ejection panel 63. During the opening and closing process of the injection mold 2, the support plate ensures that the ejection panel 63 remains stable during the movement and positioning process by connecting with the rear template 60. The design of the support plate is suitable for injection molding processes that require high mold movement accuracy and stability, especially for large and complex structure injection molded magnets 1, it is necessary to ensure that each part of the mold can be accurately aligned during movement. Through the support of the support plate, the load on the ejection panel 63 during the movement and positioning process can be reduced, and the service life of the ejection component can be extended.

[0066] The working principle of an injection mold and an injection molded magnet provided by the utility model is as follows: the injection molded magnet provided by the utility model has a first surface and a second surface relative to each other along its thickness direction; a plurality of coupling grooves are provided on the first surface of the injection molded magnet, and the arrangement of the coupling grooves can increase the contact surface area between the external plastic material and the injection molded magnet, so that the external injection molded material can be embedded in the injection molded magnet, thereby enhancing the coupling performance between the injection molded magnet and the external injection molded material and preventing relative misalignment and sliding.

[0067] The utility model provides an injection mold for injection molding the injection molded magnet, the injection mold comprises a top clamping plate, a bottom clamping plate, a front template, a rear template, a cavity and a core; wherein the front template is installed on the bottom surface of the top clamping plate, and the rear template is installed on the top surface of the bottom clamping plate; the front template is directly above the rear template; the cavity is arranged on the front template; the core is arranged on the rear template; the accommodating cavity formed by the combination of the cavity and the core is adapted to the shape of the injection molded magnet. The core function of the injection mold is to inject molten plastic into the cavity, and to mold it into the desired magnet shape through cooling and solidification processes. The front template and the rear template of the mold are respectively provided with a cavity and a core, which form an accommodating cavity after being combined. The molten plastic enters the accommodating cavity through a pouring system, and as the plastic cools and solidifies, it will fill the accommodating cavity and take the shape of the accommodating cavity, and finally form an injection molded magnet.

[0068] For other structures of the injection mold and the injection-molded magnet described in this embodiment, refer to the prior art.

[0069] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An injection molded magnet, characterized in that: The injection-molded magnet (1) has a first surface (10) and a second surface (20) that are opposite to each other along its thickness direction; The first surface (10) of the injection-molded magnet (1) is provided with a plurality of coupling grooves (11); the thickness of the injection-molded magnet (1) is 2.48 mm to 2.55 mm; and the injection-molded magnet (1) is injection-molded in a mold.

2. An injection molded magnet according to claim 1, characterized in that: The injection-molded magnet (1) is annular, the coupling groove (11) is arc-shaped, and a discontinuity (12) is provided between adjacent coupling grooves (11).

3. The injection molded magnet according to claim 1, characterized in that: The injection-molded magnet (1) has four coupling grooves (11).

4. An injection molded magnet according to claim 3, characterized in that: The coupling grooves (11) are evenly distributed on the first surface (10) of the injection-molded magnet (1).

5. An injection mold, characterized in that: The injection mold is used for injection molding of the injection-molded magnet according to any one of claims 1 to 4.

6. An injection mold according to claim 5, characterized in that: The injection mold comprises: A top clamping plate (30), a bottom clamping plate (40), a front mold plate (50), a rear mold plate (60), a mold cavity (51) and a mold core (61); The front template (50) is mounted on the bottom surface of the top clamping plate (30), and the rear template (60) is mounted on the top surface of the bottom clamping plate (40); the front template (50) is directly above the rear template (60); the mold cavity (51) is arranged on the front template (50); the mold core (61) is arranged on the rear template (60); and the accommodating cavity formed by the combination of the mold cavity (51) and the mold core (61) is adapted to the shape of the injection-molded magnet (1).

7. An injection mold according to claim 6, characterized in that: The front template (50) is provided with four cavities (51), and the rear template (60) is correspondingly provided with four cores (61).

8. The injection mold according to claim 6, characterized in that: The injection mold (2) further comprises a casting assembly, wherein the casting assembly comprises a main flow channel (52), a branch flow channel (54) and a flow channel plate (53); The flow channel plate (53) is connected to the outlet of the main flow channel (52), and the flow channel plate (53) is connected to the inlet of the branch flow channel (54); The runner (54) comprises a gate, and the gate is connected to the mold cavity (51); The outer wall of the main flow channel (52) is wrapped with a main pouring sleeve, and the outer wall of the branch flow channel (54) is wrapped with a branch pouring sleeve.

9. The injection mold according to claim 6, characterized in that: The injection mold (2) further comprises an ejector assembly, wherein the ejector assembly comprises an ejector bottom plate (62), an ejector panel (63) and an ejector pin (64); The ejector pin (64) is mounted on the ejection bottom plate (62), and the ejector pin (64) passes through the ejection panel (63) and is connected to the mold cavity (51).

10. The injection mold according to claim 6, characterized in that: The injection mold further comprises: A reset assembly, the reset assembly comprising a reset rod (65) and a reset spring (66), the reset spring (66) being sleeved on the reset rod (65), and the reset rod (65) being connected to the bottom clamping plate (40); A guide assembly, the guide assembly comprising a guide column (67) and a guide sleeve (68), the guide column (67) being fixedly arranged on the rear template (60), the guide sleeve (68) being fixedly arranged on the front template (50), and the guide column (67) being adapted to be plugged into the guide sleeve (68).