Manufacturing process of magnet rubber-coated part

Abstract

The manufacturing process of the magnet rubber-coated part comprises the steps that a to-be-rubber-coated magnet is placed in an injection molding cavity of an injection mold, the to-be-rubber-coated magnet is movably arranged in the injection molding cavity and matched with the injection mold in a limiting mode, the injection mold is not magnetic, and the to-be-rubber-coated magnet is arranged in the injection molding cavity in the opening and closing direction of the injection mold; the height size of the injection molding cavity is greater than the thickness size of the magnet to be encapsulated; the to-be-encapsulated magnet is driven by a magnetic part arranged on the injection mold to move close to or away from the magnetic part, so that the to-be-encapsulated magnet is located at a preset position in the injection molding cavity, and the to-be-encapsulated magnet and the magnetic part are oppositely arranged; injecting an injection molding material into the injection molding cavity; and outputting the magnet rubber-coated part. The to-be-encapsulated magnet exceeding the preset thickness size range can be prevented from being fractured by an injection mold or completely wrapped by an injection molding material.

Description

Technical Field

[0001] The present application relates to the field of molding of magnet rubber-coated parts, and in particular to a manufacturing process of magnet rubber-coated parts. Background Art

[0002] In the related art, in order to prevent the magnetic attraction ability of the magnet-coated parts from failing to reach the preset indicators, the magnet in the magnet-coated parts cannot be completely covered by the injection molding material, and one end wall of the magnet needs to be exposed to the external environment. In the process of encapsulating the magnet, the magnet cannot move in the injection molding cavity. Therefore, the height dimension of the injection molding cavity of the injection mold needs to match the thickness dimension of the magnet so that the magnet can stop against the inner wall of the injection molding cavity, which can prevent the injection molding material from covering the outside of the end wall where the magnet stops against the inner wall of the injection molding cavity.

[0003] It is difficult to control the thickness of all magnets within a preset thickness range when manufacturing magnets. When the thickness of the magnet is greater than the maximum value of the preset thickness range, the magnet will be crushed when the injection mold is closed, causing the magnet to be scrapped. When the thickness of the magnet is less than the minimum value of the preset thickness range, the magnet cannot stop against the inner wall of the injection molding cavity, and the magnet is completely covered by the injection molding material, which reduces the magnetic attraction of the magnet-coated parts and reduces the product quality of the magnet-coated parts. Summary of the invention

[0004] In order to prevent magnets exceeding a preset thickness range from being crushed by an injection mold or being completely covered by the injection molding material, the present application provides a manufacturing process for magnet encapsulated parts.

[0005] The present application provides a manufacturing process for a magnet encapsulated plastic part using the following technical solution: A manufacturing process for a magnet coated with rubber parts, comprising the following steps: placing a magnet to be coated with rubber in an injection cavity of an injection mold, wherein the magnet to be coated with rubber is movably arranged in the injection cavity and is limitedly matched with the injection mold, wherein the injection mold is non-magnetic, and along the opening and closing direction of the injection mold, the height dimension of the injection cavity is greater than the thickness dimension of the magnet to be coated with rubber; using a magnetic part arranged in the injection mold to drive the magnet to be coated with rubber to move close to or away from the magnetic part, so that the magnet to be coated with rubber is located at a preset position in the injection cavity, wherein the magnet to be coated with rubber is arranged opposite to the magnetic part; injecting injection molding material into the injection cavity; and outputting the magnet coated with rubber parts.

[0006] By adopting the above technical solution, the magnet to be coated is movably arranged in the injection molding cavity, and then the magnet to be coated is driven by the magnetic part to move to the preset position of the magnet to be coated in the injection molding cavity, and along the opening and closing direction of the injection mold, one end wall of the magnet to be coated is stopped against the inner top wall or inner bottom wall of the injection molding cavity. Compared with the prior art, the present application can prevent the magnet to be coated that exceeds the preset thickness size range from being crushed by the injection mold or being completely covered by the injection molding material.

[0007] Preferably, the injection mold includes a first mold, a second mold and a mounting plate. Along the opening and closing direction of the injection mold, the second mold is located between the first mold and the mounting plate, and the first mold, the second mold and the mounting plate are arranged relative to each other. The magnetic part is arranged on the mounting plate. The second mold is suitable for abutting against the first mold and the mounting plate. The first mold is provided with a first molding cavity near the end wall of the second mold, and the second mold is provided with a second molding cavity near the end wall of the first mold. The first molding cavity and the second molding cavity are suitable for defining the injection cavity. The first mold or the second mold is provided with a position detection component, and the position detection component is suitable for being opposite to the magnet to be coated and for detecting the position of the magnet to be coated.

[0008] By adopting the above technical solution, by using the position detection part to detect the position of the magnet to be coated, it is possible to avoid the injection molding machine injecting the injection molding material into the injection molding cavity when the magnet to be coated has not moved to the preset position, thereby avoiding the magnet to be coated being completely covered by the injection molding material, and further improving the product quality of the magnet coated parts.

[0009] Preferably, the first molding cavity is provided with a first limiting groove, the second molding cavity is provided with a second limiting groove, the first limiting groove and the second limiting groove are opposite to each other and are suitable for being connected, and a sliding channel is suitable for being defined between the first limiting groove and the second limiting groove.

[0010] The method of placing the magnet to be coated with glue in the injection cavity of the injection mold, wherein the magnet to be coated with glue is movably arranged in the injection cavity and is limitedly matched with the injection mold, comprises the following steps: driving the first mold to move away from the second mold; placing the magnet to be coated with glue in the second limiting groove; driving the first mold to move close to the second mold, wherein the magnet to be coated with glue is located in the sliding channel and is suitable for moving along the sliding channel, and the magnet to be coated with glue is limitedly matched with both the first limiting groove and the second limiting groove.

[0011] By adopting the above technical solution, by placing the magnet to be coated with rubber in the second limiting groove, and then driving the first mold to move close to the second mold, the magnet to be coated with rubber is located in the sliding channel and is limited by the first limiting groove and the second limiting groove. When the magnet to be coated with rubber moves along the sliding channel, the first limiting groove and the second limiting groove both limit the magnet to be coated with rubber, which can prevent the magnet to be coated with rubber from deviating from the preset position, and can prevent the magnet in the magnet coated part from being not in the preset position, resulting in the magnet coated part being unable to be used normally, thereby improving the product quality of the magnet coated part.

[0012] Preferably, before driving the first mold to move away from the second mold, the manufacturing process of the magnet-encapsulated rubber part further includes the following steps: when the magnetic part is configured as a magnet, driving both the first mold and the second mold to move away from the mounting plate.

[0013] By adopting the above technical solution, it can be avoided that when the magnet to be coated is placed in the second molding cavity, the magnetic poles of the magnetic component and the magnetic poles of the magnet to be coated close to the magnetic component repel each other, and the magnetic component applies a repulsive force to the magnet to be coated. Under the action of the repulsive force, the magnet to be coated moves away from the magnetic component and leaves the second mold, thereby avoiding the inability to place the magnet to be coated in the second molding cavity.

[0014] Preferably, the method of using a magnetic part provided in the injection mold to drive the magnet to be coated with glue to move closer to or away from the magnetic part so that the magnet to be coated with glue is located at a preset position in the injection cavity includes the following steps: when the magnetic poles of the magnet to be coated with glue are close to the mounting plate and repel the magnetic poles of the magnetic part, the magnetic part is used to drive the magnet to be coated with glue to move away from the magnetic part to the preset position; when the magnetic poles of the magnet to be coated with glue are close to the mounting plate and attract the magnetic poles of the magnetic part, the magnetic part is used to drive the magnet to be coated with glue to move close to the magnetic part to the preset position; and detecting whether the magnet to be coated with glue is located at the preset position.

[0015] By adopting the above technical scheme, according to the repulsion of like poles and the attraction of opposite poles, when the magnet to be coated with glue and the magnetic part repel each other, the magnetic part drives the magnet to be coated with glue to move away from the magnetic part to a preset position, and when the magnet to be coated with glue and the magnetic part attract each other, the magnetic part drives the magnet to be coated with glue to move close to the magnetic part to the preset position, and then detects whether the magnet to be coated with glue moves to the preset position. When the magnet to be coated with glue is at the preset position, the magnetic part stops driving the magnet to be coated with glue to move, and then the injection molding machine injects the injection molding material into the injection molding cavity, so as to coat the magnet to be coated with glue.

[0016] Preferably, the detection of whether the magnet to be coated with glue is located at a preset position includes the following steps: detecting the position of the magnet to be coated with glue based on the position detection part, and then judging whether the magnet to be coated with glue is opposite to the position detection part; if the magnet to be coated with glue is opposite to the position detection part, stopping driving the magnet to be coated with glue to move; if the magnet to be coated with glue is not opposite to the position detection part, judging whether the magnet to be coated with glue passes through the position detection part; if the magnet to be coated with glue passes through the position detection part, reducing the driving force of the magnetic part on the magnet to be coated with glue so that the magnet to be coated with glue moves close to the position detection part; if the magnet to be coated with glue does not pass through the position detection part, increasing the driving force of the magnetic part on the magnet to be coated with glue so that the magnet to be coated with glue moves close to the position detection part.

[0017] By adopting the above technical solution, by using the position detection component to detect the position of the magnet to be coated, when the magnet to be coated is in the preset position, the magnetic component stops driving the magnet to be coated to move; when the magnet to be coated is not in the preset position and the magnet to be coated passes the preset position, the driving force of the magnetic component on the magnet to be coated is reduced, and the magnet to be coated moves closer to the preset position; when the magnet to be coated is not in the preset position and the magnet to be coated does not pass the preset position, the driving force of the magnetic component on the magnet to be coated is increased, and the magnet to be coated moves closer to the preset position. Such an arrangement enables the magnet to be coated to accurately move to the preset position.

[0018] Preferably, the determination of whether the magnet to be coated with glue has passed through the position detection component comprises the following steps: detecting the triggering state of the position detection component, and determining whether the position detection component is triggered according to the triggering state; if the position detection component is triggered, determining that the magnet to be coated with glue has passed through the position detection component; if the position detection component is not triggered, determining that the magnet to be coated with glue has not passed through the position detection component.

[0019] By adopting the above technical solution, by detecting the triggering state of the position detection member, it is determined whether the position detection member is triggered according to the triggering state, so as to identify whether the magnet to be coated with glue passes through the preset position, and then the driving force of the magnetic member on the magnet to be coated with glue can be adjusted according to the actual position of the magnet to be coated with glue, so that the magnet to be coated with glue can move to the preset position.

[0020] Preferably, before using the magnetic part provided in the injection mold to drive the magnet to be encapsulated to move closer to or away from the magnetic part, the manufacturing process of the magnet encapsulated part also includes the following steps: when the magnetic part is configured as a magnet, driving the first mold and the second mold to move closer to the mounting plate.

[0021] By adopting the above technical solution, the distance between the magnet to be coated with rubber and the magnetic part can be reduced, and the problem of the magnetic part being unable to drive the magnet to be coated with rubber to a preset position due to the distance between the magnet to be coated with rubber and the magnetic part being too large can be avoided, thereby improving the reliability of the manufacturing process of iron-coated parts.

[0022] Preferably, the magnetic member is protruding toward the second mold, and an accommodating hole is provided on the end wall of the second mold close to the mounting plate. The magnetic member is opposite to the accommodating hole, and the magnetic member is suitable for extending into or moving out of the accommodating hole.

[0023] By adopting the above technical solution, when the magnet to be coated with glue is placed in the injection molding cavity and the first mold and the second mold are stopped, the first mold and the second mold are driven to move close to the mounting plate, and the upper end of the magnetic part extends into the accommodating hole, thereby shortening the distance between the magnetic part and the magnet to be coated with glue, and improving the magnetic field strength of the magnetic part at the magnet to be coated with glue, so that the magnetic part can better drive the magnet to be coated with glue to move.

[0024] Preferably, there are multiple magnets to be coated with glue and multiple magnetic parts, and the multiple magnets to be coated with glue and the multiple magnetic parts are arranged in sequence along the radial direction of the injection mold at intervals, and the multiple magnets to be coated with glue and the multiple magnetic parts are arranged in one-to-one correspondence.

[0025] By adopting the above technical solution, by setting up multiple magnetic parts and setting the multiple magnetic parts in one-to-one correspondence with the multiple magnets to be coated with glue, the magnetic parts drive the corresponding magnets to be coated with glue to move to the preset positions, thereby achieving the technical effect of multiple magnetic parts simultaneously driving the corresponding magnets to be coated with glue to move to the preset positions.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By movably setting the magnet to be coated in the injection mold cavity, and then using the magnetic part to drive the magnet to be coated to move to the preset position of the magnet in the injection mold cavity, along the opening and closing direction of the injection mold, one end wall of the magnet to be coated is stopped against the inner top wall or inner bottom wall of the injection mold cavity. Compared with the prior art, the present application can prevent the magnet to be coated that exceeds the preset thickness range from being crushed by the injection mold or being completely covered by the injection molding material; 2. The present application can avoid the situation that when the magnet to be coated is placed in the second molding cavity, the magnetic poles of the magnetic component and the magnetic poles of the magnet to be coated close to the magnetic component repel each other, and the magnetic component exerts a repulsive force on the magnet to be coated. Under the action of the repulsive force, the magnet to be coated moves away from the magnetic component and leaves the second mold, thereby avoiding the inability to place the magnet to be coated in the second molding cavity; 3. When the magnet to be coated with glue is placed in the injection cavity and the first mold and the second mold are stopped, the first mold and the second mold are driven to move close to the mounting plate, and the upper end of the magnetic part extends into the accommodating hole, thereby shortening the distance between the magnetic part and the magnet to be coated with glue, and increasing the magnetic field strength of the magnetic part at the magnet to be coated with glue, so that the magnetic part can better drive the magnet to be coated with glue to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of the manufacturing process of the magnet encapsulated component according to the embodiment of the present application; Figure 2 is a schematic diagram of an injection mold according to an embodiment of the present application; Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 is a schematic diagram of a first mold according to an embodiment of the present application; Figure 5 It is a schematic diagram of the second mold according to an embodiment of the present application.

[0028] Description of reference numerals: 100. Injection mold; 1. first mold; 11. first molding cavity; 111. first limiting groove; 112. sliding channel; 113. first wall surface; 2. second mold; 21. second molding cavity; 211. second limiting groove; 212. second wall surface; 22. position detection member; 23. receiving hole; 3. Injection cavity; 4. Mounting plate; 41. Magnetic parts; 5. Magnets to be coated with glue. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0030] The embodiment of the present application discloses a manufacturing process of a magnet-encapsulated plastic part.

[0031] Reference Figure 1-Figure 3 According to the embodiment of the present application, the manufacturing process of the magnet encapsulated component comprises the following steps: S1. Place the magnet 5 to be coated with glue in the injection cavity 3 of the injection mold 100. The magnet 5 to be coated with glue is movably arranged in the injection cavity 3 and is limitedly matched with the injection mold 100.

[0032] Specifically, the injection mold 100 is opened and the magnet 5 to be coated is placed in the injection mold 100, and then the injection mold 100 is closed so that the magnet 5 to be coated is located in the injection cavity 3. When the magnet 5 to be coated is driven, the magnet 5 to be coated moves in the injection cavity 3 along the opening and closing direction of the injection mold 100. The opening and closing direction of the injection mold 100 can refer to the up and down direction in Figure X.

[0033] Furthermore, by limiting the magnet 5 to be coated with glue and the injection mold 100, it is possible to prevent the magnet 5 to be coated with glue from deviating from the preset position when moving in the injection cavity 3, and to prevent the magnet in the magnet coated part from being not in the preset position, resulting in the magnet coated part being scrapped.

[0034] Furthermore, the injection mold 100 is non-magnetic. When the magnet 5 to be coated is placed in the injection cavity 3 , the magnet 5 to be coated can be prevented from being adsorbed on the injection mold 100 , thereby preventing the magnet 5 to be coated from being unable to move in the injection cavity 3 .

[0035] Furthermore, along the opening and closing direction of the injection mold 100 , the height dimension of the injection cavity 3 is greater than the thickness dimension of the magnet 5 to be encapsulated.

[0036] It should be noted that the material of the injection mold 100 is non-magnetic steel. In some specific embodiments, the grade of the non-magnetic steel may be 20Mn23AlV, but the present application is not limited thereto. The grade of the non-magnetic steel may also be 45Mn17Al3.

[0037] S2. Use the magnetic part 41 provided in the injection mold 100 to drive the magnet 5 to be coated with glue to move closer to or away from the magnetic part 41, so that the magnet 5 to be coated with glue is located at a preset position in the injection cavity 3, wherein the magnet 5 to be coated with glue is arranged opposite to the magnetic part 41.

[0038] Specifically, after the magnet 5 to be coated with glue is placed in the injection cavity 3 and the injection mold 100 is closed, the magnet 5 to be coated with glue is driven by the magnetic member 41 to move toward or away from the magnetic member 41 to a preset position.

[0039] Along the opening and closing direction of the injection mold 100, the injection cavity 3 has a first wall 113 and a second wall 212 relative to each other, and the magnet 5 to be encapsulated is located between the first wall 113 and the second wall 212. In some specific embodiments, the first wall 113 is the inner top wall of the injection cavity 3, and the second wall 212 is the inner bottom wall of the injection cavity 3.

[0040] In some specific embodiments, the preset position of the magnet to be coated 5 in the injection cavity 3 may be the position of the magnet to be coated 5 in the injection cavity 3 when the magnet to be coated 5 abuts against the first wall 113. In other specific embodiments, the preset position of the magnet to be coated 5 in the injection cavity 3 may also be the position of the magnet to be coated 5 in the injection cavity 3 when the magnet to be coated 5 abuts against the second wall 212. In other specific embodiments, the preset position of the magnet to be coated 5 in the injection cavity 3 may also be the position of the magnet to be coated 5 in the injection cavity 3 when the magnet to be coated 5 abuts against both the first wall 113 and the second wall 212.

[0041] In some specific embodiments, the magnetic member 41 may be located above or below the magnet 5 to be coated with glue.

[0042] In some specific embodiments, the preset position of the magnet to be coated 5 in the injection cavity 3 is constructed as follows: when the magnet to be coated 5 stops against the first wall 113, the position of the magnet to be coated 5 in the injection cavity 3 is such that the first wall 113 is located above the magnet to be coated 5, and the magnetic part 41 is located below the magnet to be coated 5. After the magnet to be coated 5 is placed in the injection cavity 3 and the injection mold 100 is closed, the magnetic part 41 drives the magnet to be coated 5 to move away from the magnetic part 41 so that the magnet to be coated 5 stops against the first wall 113.

[0043] In some specific embodiments, the magnetic part 41 can be an electromagnet, but the present application is not limited thereto. The magnetic part 41 can also be a magnet, etc. It should be noted that the magnetic part 41 drives the magnet 5 to be encapsulated to move through magnetic force, and in the process of placing the magnet 5 to be encapsulated in the injection molding cavity 3, the magnetic part 41 does not apply magnetic force to the magnet 5 to be encapsulated.

[0044] S3, injecting molding material into the molding cavity 3. Specifically, after the magnet 5 to be encapsulated is located at a preset position in the molding cavity 3, the injection molding machine injects molding material into the molding cavity 3 through the feed port and feed channel of the injection mold 100, and the molding material is coated on the outside of the magnet 5 to be encapsulated.

[0045] In some specific embodiments, the injection molding material may be polypropylene, but the present application is not limited thereto, and the injection molding material may also be polycarbonate or the like.

[0046] S4, outputting the plastic-coated magnet part. Specifically, after the injection material in the injection cavity 3 is cooled and formed, the injection mold 100 is opened, and then the plastic-coated magnet part is taken out from the injection mold 100.

[0047] Thus, by movably setting the magnet 5 to be coated in the injection cavity 3, and then using the magnetic member 41 to drive the magnet 5 to be coated to move to the preset position of the magnet 5 to be coated in the injection cavity 3, along the opening and closing direction of the injection mold 100, one end wall of the magnet 5 to be coated is stopped against the inner top wall or inner bottom wall of the injection cavity 3. Compared with the prior art, the present application can prevent the magnet 5 to be coated that exceeds the preset thickness range from being crushed by the injection mold 100 or being completely covered by the injection material.

[0048] Specifically, when the thickness of the magnet 5 to be coated with rubber is greater than the maximum value of the preset thickness range, the magnet 5 to be coated with rubber can be prevented from being crushed by the injection mold 100, thereby reducing the number of scrapped magnets 5 to be coated with rubber. When the thickness of the magnet 5 to be coated with rubber is less than the minimum value of the preset thickness range, the magnet 5 to be coated with rubber can be prevented from being unable to stop against the inner top wall or inner bottom wall of the injection cavity 3, thereby preventing the magnet 5 to be coated with rubber from being completely covered by the injection molding material, thereby avoiding the reduction of the magnetic attraction ability of the magnet coated parts, and improving the product quality of the magnet coated parts.

[0049] Reference Figure 2-Figure 5 In some embodiments of the present application, the injection mold 100 includes a first mold 1, a second mold 2 and a mounting plate 4. Along the opening and closing direction of the injection mold 100, the second mold 2 is located between the first mold 1 and the mounting plate 4. Specifically, the first mold 1 is located above the second mold 2, the mounting plate 4 is located below the second mold 2, and the first mold 1, the second mold 2 and the mounting plate 4 are arranged relative to each other.

[0050] The magnetic part 41 is arranged at the end of the mounting plate 4 close to the second mold 2, and the second mold 2 is suitable for abutting against the first mold 1 and the mounting plate 4. The first mold 1 is provided with a first molding cavity 11 on the end wall close to the second mold 2, and the second mold 2 is provided with a second molding cavity 21 on the end wall close to the first mold 1. The first molding cavity 11 and the second molding cavity 21 are opposite to each other and suitable for being connected, and the first molding cavity 11 and the second molding cavity 21 are suitable for defining an injection cavity 3 between them. Specifically, when the first mold 1 and the second mold 2 are abutted, the injection cavity 3 is defined between the first molding cavity 11 and the second molding cavity 21, the first wall surface 113 is the bottom wall of the first molding cavity 11, and the second wall surface 212 is the bottom wall of the second molding cavity 21.

[0051] In some specific embodiments, when the magnet 5 to be coated with glue needs to stop against the first wall 113, the first mold 1 is driven to move away from the second mold 2, and then the magnet 5 to be coated with glue is placed in the second molding cavity 21, and then the first mold 1 is driven to move close to the second mold 2 to make the first mold 1 and the second mold 2 stop, the magnet 5 to be coated with glue is located in the injection molding cavity 3, and the magnet 5 to be coated with glue is limitedly matched with the first mold 1 and the second mold 2, and then the magnetic part 41 drives the magnet 5 to be coated with glue to move away from the magnetic part 41, so that the technical effect of the magnet 5 to be coated with glue and the bottom wall of the first molding cavity 11 can be achieved.

[0052] In other specific embodiments, when the magnet 5 to be coated with glue needs to abut against the second wall 212, when the magnet 5 to be coated with glue is placed in the injection cavity 3 and the first mold 1 and the second mold 2 abut against each other, the magnetic component 41 drives the magnet 5 to be coated with glue to move closer to the magnetic component 41 so that the magnet 5 to be coated with glue is attached to the second wall 212.

[0053] It should be noted that both the first mold 1 and the second mold 2 are suitable for being driven by an injection molding machine.

[0054] In addition, the first mold 1 or the second mold 2 is provided with a position detection component 22, and the position detection component 22 is spaced apart from the injection cavity 3. The position detection component 22 is suitable for being opposite to the magnet to be coated 5 and is used to detect the position of the magnet to be coated 5. By using the position detection component 22 to detect the position of the magnet to be coated 5, it is possible to avoid the injection molding machine from injecting injection material into the injection cavity 3 when the magnet to be coated 5 has not moved to a preset position, thereby avoiding the magnet to be coated 5 from being completely covered by the injection material, thereby improving the product quality of the magnet coated parts.

[0055] Specifically, when the preset position of the magnet 5 to be coated is located in the first mold 1, the position detection component 22 is set in the first mold 1, and when the preset position of the magnet 5 to be coated is located in the second mold 2, the position detection component 22 is set in the second mold 2.

[0056] In some specific embodiments, the position detection element 22 is preferably a Hall sensor.

[0057] Reference Figure 2-Figure 5 In some embodiments of the present application, a first limiting groove 111 is provided in the first molding cavity 11, and a second limiting groove 211 is provided in the second molding cavity 21. Along the opening and closing direction of the injection mold 100, the first limiting groove 111 and the second limiting groove 211 are opposite to each other and are suitable for being connected. A sliding channel 112 is suitable for being defined between the first limiting groove 111 and the second limiting groove 211. Specifically, when the first mold 1 and the second mold 2 are stopped, the first limiting groove 111 and the second limiting groove 211 are connected, and a sliding channel 112 is defined between the first limiting groove 111 and the second limiting groove 211.

[0058] The magnet 5 to be coated with glue is placed in the injection cavity 3 of the injection mold 100. The magnet 5 to be coated with glue is movably arranged in the injection cavity 3 and is limitedly matched with the injection mold 100, including the following steps: S11 , driving the first mold 1 to move away from the second mold 2 . Specifically, the injection molding machine drives the first mold 1 to move away from the second mold 2 .

[0059] S12, placing the magnet 5 to be coated with glue in the second limiting groove 211. Specifically, the operator places the magnet 5 to be coated with glue in the second limiting groove 211, and the magnet 5 to be coated with glue is limitedly matched with the second limiting groove 211.

[0060] S13, drive the first mold 1 to move close to the second mold 2, the magnet 5 to be coated with glue is located in the sliding channel 112 and is suitable for moving along the sliding channel 112, and the magnet 5 to be coated with glue is limited by the first limiting groove 111 and the second limiting groove 211. Specifically, drive the first mold 1 to move close to the second mold 2, the first mold 1 and the second mold 2 stop, the first limiting groove 111 and the second limiting groove 211 are connected and jointly define the sliding channel 112, the sliding channel 112 extends along the opening and closing direction of the injection mold 100, the magnet 5 to be coated with glue is located in the sliding channel 112, when the magnet 5 to be coated with glue is driven by the magnetic part 41, the magnet 5 to be coated with glue moves along the sliding channel 112 to the preset position in the injection cavity 3, and when the magnet 5 to be coated with glue moves along the sliding channel 112, the first limiting groove 111 and the second limiting groove 211 both limit the magnet 5 to be coated with glue.

[0061] By placing the magnet 5 to be coated with glue in the second limiting groove 211 and then driving the first mold 1 to move close to the second mold 2, the magnet 5 to be coated with glue is located in the sliding channel 112 and is limited by the first limiting groove 111 and the second limiting groove 211. When the magnet 5 to be coated with glue moves along the sliding channel 112, the first limiting groove 111 and the second limiting groove 211 both limit the magnet 5 to be coated with glue, which can prevent the magnet 5 to be coated with glue from deviating from the preset position, and can prevent the magnet in the magnet coated part from being not in the preset position, resulting in the magnet coated part being unable to be used normally, thereby improving the product quality of the magnet coated part.

[0062] In some embodiments of the present application, before driving the first mold 1 to move away from the second mold 2, the manufacturing process of the magnet encapsulated component further includes the following steps: S14, when the magnetic member 41 is configured as a magnet, the first mold 1 and the second mold 2 are driven to move away from the mounting plate 4. Specifically, refer to Figure 2 and Figure 3Before placing the magnet 5 to be coated with glue in the injection cavity 3, the first mold 1 and the second mold 2 are driven to move away from the mounting plate 4, and then the first mold 1 is driven to move away from the second mold 2, and finally the magnet 5 to be coated with glue is placed in the second molding cavity 21, so as to avoid that when the magnet 5 to be coated with glue is placed in the second molding cavity 21, the magnetic poles of the magnetic component 41 and the magnetic poles of the magnet 5 to be coated with glue close to the magnetic component 41 repel each other, and the magnetic component 41 applies a repulsive force to the magnet 5 to be coated with glue, and under the action of the repulsive force, the magnet 5 to be coated with glue moves away from the magnetic component 41 and detaches from the second mold 2, so as to avoid that the magnet 5 to be coated with glue cannot be placed in the second molding cavity 21.

[0063] Furthermore, when the magnetic poles of the magnetic component 41 and the magnet 5 to be coated with rubber are attracted to each other when the magnetic poles of the magnetic component 41 are close to each other, the magnetic component 41 exerts an attractive force on the magnet 5 to be coated with rubber. When the position of the magnet 5 to be coated with rubber needs to be adjusted, the magnet 5 to be coated with rubber adheres to the bottom wall of the second molding cavity 21 under the action of the attractive force, making it difficult to adjust the position of the magnet 5 to be coated with rubber.

[0064] Furthermore, when the magnetic component 41 is constructed as an electromagnet, before the magnet 5 to be encapsulated is placed in the injection cavity 3, the magnetic component 41 is powered off so that the magnetic component 41 cannot generate a magnetic field, and the first mold 1 and the second mold 2 do not need to move away from the mounting plate 4. Then, the first mold 1 is driven to move away from the second mold 2, and finally the magnet 5 to be encapsulated is placed in the second molding cavity 21.

[0065] In some embodiments of the present application, the magnetic member 41 provided in the injection mold 100 is used to drive the magnet 5 to be coated with glue to move closer to or away from the magnetic member 41, so that the magnet 5 to be coated with glue is located at a preset position in the injection cavity 3, including the following steps: S21, when the magnetic poles of the magnet 5 to be coated are close to the mounting plate 4 and repel each other with the magnetic poles of the magnetic member 41, the magnetic member 41 is used to drive the magnet 5 to be coated away from the magnetic member 41 to move to a preset position. Specifically, refer to Figure 3 When the magnetic poles of the magnet 5 to be coated close to the mounting plate 4 and the magnetic poles of the magnetic component 41 close to the second mold 2 repel each other, that is, the magnetic poles of the magnet 5 to be coated close to the mounting plate 4 and the magnetic poles of the magnetic component 41 close to the second mold 2 are the same magnetic poles, the magnetic component 41 exerts a repulsive force on the magnet 5 to be coated, and under the action of the repulsive force, the magnet 5 to be coated moves away from the magnetic component 41 to a preset position.

[0066] In some specific embodiments, the magnetic pole of the magnet 5 to be coated close to the mounting plate 4 is N-level, and the magnetic pole of the magnetic member 41 close to the second mold 2 can be N-level.

[0067] S22, when the magnetic poles of the magnet 5 to be coated are close to the mounting plate 4 and are attracted to the magnetic poles of the magnetic member 41, the magnetic member 41 is used to drive the magnet 5 to be coated to move close to the magnetic member 41 to a preset position. Specifically, refer to Figure 3 When the magnetic poles of the magnet 5 to be coated with rubber close to the mounting plate 4 and the magnetic poles of the magnetic component 41 close to the second mold 2 are attracted to each other, that is, the magnetic poles of the magnet 5 to be coated with rubber close to the mounting plate 4 and the magnetic poles of the magnetic component 41 close to the second mold 2 are opposite magnetic poles, the magnetic component 41 exerts an attractive force on the magnet 5 to be coated with rubber, and under the action of the attractive force, the magnet 5 to be coated with rubber moves close to the magnetic component 41 to a preset position.

[0068] In some specific embodiments, the magnetic pole of the magnet 5 to be coated close to the mounting plate 4 may be of N level, and the magnetic pole of the magnetic member 41 close to the second mold 2 may be of S level.

[0069] It should be noted that the magnetic pole of the magnetic part 41 close to the second mold 2 remains fixed, and the operator can adjust the magnetic pole of the magnet 5 to be encapsulated close to the mounting plate 4 according to the preset position of the magnet 5 to be encapsulated in the injection cavity 3, so that the magnetic part 41 drives the magnet 5 to be encapsulated to move closer to or away from the magnetic part 41.

[0070] S23, detect whether the magnet 5 to be coated is located at a preset position, specifically, refer to Figure 2 The position detection part 22 detects whether the magnet 5 to be coated is located at the preset position. When the magnet 5 to be coated is located at the preset position, the magnetic part 41 stops driving the magnet 5 to be coated to move, and then the injection molding machine injects the injection material into the injection cavity 3. When the magnet 5 to be coated is not located at the preset position, the magnetic part 41 continues to drive the magnet 5 to be coated to move to the preset position.

[0071] According to the repulsion of like poles and the attraction of opposite poles, when the magnet 5 to be coated with glue and the magnetic part 41 repel each other, the magnetic part 41 drives the magnet 5 to be coated with glue to move away from the magnetic part 41 to a preset position; when the magnet 5 to be coated with glue and the magnetic part 41 attract each other, the magnetic part 41 drives the magnet 5 to be coated with glue to move close to the magnetic part 41 to the preset position, and then detects whether the magnet 5 to be coated with glue has moved to the preset position. When the magnet 5 to be coated with glue is at the preset position, the magnetic part 41 stops driving the magnet 5 to be coated with glue to move, and then the injection molding machine injects the injection molding material into the injection molding cavity 3, so as to coat the magnet 5 to be coated with glue.

[0072] In some embodiments of the present application, detecting whether the magnet 5 to be coated with glue is located at a preset position includes the following steps: S231, based on the position detection member 22, the position of the magnet 5 to be coated with glue is detected, and then it is determined whether the magnet 5 to be coated with glue is opposite to the position detection member 22. Specifically, refer to Figure 2The position detection part 22 is opposite to the preset position of the magnet 5 to be coated with glue in the injection cavity 3. When the magnet 5 to be coated with glue is opposite to the position detection part 22, the position detection part 22 is continuously triggered. By detecting the triggering state of the position detection part 22, it is determined whether the magnet 5 to be coated with glue is opposite to the position detection part 22 according to the triggering state of the position detection part 22.

[0073] In some specific embodiments, the position detection element 22 is preferably a Hall sensor.

[0074] S232. If the magnet to be coated with glue 5 is opposite to the position detection part 22, stop driving the magnet to be coated with glue 5 to move. Specifically, when the position detection part 22 is continuously triggered, it is determined that the magnet to be coated with glue 5 is opposite to the position detection part 22, and the magnetic part 41 stops driving the magnet to be coated with glue 5 to move, thereby preventing the magnet to be coated with glue 5 from deviating from the preset position.

[0075] S233. If the magnet 5 to be coated with glue is not opposite to the position detection part 22, determine whether the magnet 5 to be coated with glue has passed the position detection part 22. Specifically, when the position detection part 22 is not continuously triggered, determine that the magnet 5 to be coated with glue is not opposite to the position detection part 22, and then determine whether the magnet 5 to be coated with glue has passed the position detection part 22 according to the triggering state of the position detection part 22.

[0076] S234. If the magnet 5 to be coated with rubber passes through the position detection part 22, the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber is reduced, so that the magnet 5 to be coated with rubber moves close to the position detection part 22. Specifically, when the magnet 5 to be coated with rubber moves along the sliding channel 112 and passes through the position detection part 22, the magnet 5 to be coated with rubber passes through the preset position and is not in the preset position, that is, the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber is too large, causing the magnet 5 to pass through the preset position. By reducing the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber, the magnet 5 to be coated moves close to the position detection part 22, so that the magnet 5 to be coated moves to the preset position.

[0077] In some specific embodiments, when the magnetic member 41 is constructed as an electromagnet, the driving force of the magnetic member 41 on the magnet 5 to be coated with rubber can be reduced by reducing the current passing through the magnetic member 41 .

[0078] In some specific embodiments, when the magnetic member 41 is constructed as a magnet, by driving the magnetic member 41 to move away from the second mold 2 to increase the distance between the magnetic member 41 and the magnet to be encapsulated 5, the magnetic field strength of the magnetic member 41 at the magnet to be encapsulated 5 is reduced, thereby reducing the driving force of the magnetic member 41 on the magnet to be encapsulated 5.

[0079] It should be noted that the magnetic member 41 is slidably disposed on the mounting plate 4 , and the magnetic member 41 is suitable for moving closer to or away from the second mold 2 along the opening and closing direction of the injection mold 100 .

[0080] S235. If the magnet 5 to be coated with rubber has not passed the position detection part 22, the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber is increased to make the magnet 5 to be coated with rubber move closer to the position detection part 22. Specifically, when the magnet 5 to be coated with rubber moves along the sliding channel 112 and has not passed the position detection part 22, the magnet 5 to be coated with rubber has not passed the preset position and is not in the preset position. That is to say, the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber is too small, resulting in the magnet 5 to be coated with rubber not moving to the preset position. By increasing the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber, the magnet 5 to be coated with rubber moves closer to the position detection part 22, so that the magnet 5 to be coated with rubber moves to the preset position.

[0081] In some specific embodiments, when the magnetic member 41 is constructed as an electromagnet, the driving force of the magnetic member 41 on the rubber-coated magnet 5 to be encapsulated is increased by increasing the current passing through the magnetic member 41 .

[0082] In some specific embodiments, when the magnetic member 41 is constructed as a magnet, by driving the magnetic member 41 to move closer to the second mold 2 to reduce the distance between the magnetic member 41 and the magnet to be encapsulated 5, the magnetic field strength of the magnetic member 41 at the magnet to be encapsulated 5 is enhanced, thereby increasing the driving force of the magnetic member 41 on the magnet to be encapsulated 5.

[0083] Furthermore, the injection molding machine is provided with a warning light, which can display green, red and yellow. The position detection part 22 and the warning light are both connected to the external controller for communication. When the magnet 5 to be coated with glue is opposite to the position detection part 22, the controller controls the warning light to display green according to the detection signal of the position detection part 22. When the magnet 5 to be coated with glue is not opposite to the position detection part 22 and the magnet 5 to be coated with glue passes through the position detection part 22, the controller controls the warning light to display yellow according to the detection signal of the position detection part 22. When the magnet 5 to be coated with glue is not opposite to the position detection part 22 and the magnet 5 to be coated with glue does not pass through the position detection part 22, the controller controls the warning light to display red according to the detection signal of the position detection part 22. The operator adjusts the driving force of the magnetic part 41 on the magnet 5 to be coated with glue by observing the color displayed by the warning light.

[0084] By using the position detection part 22 to detect the position of the magnet 5 to be coated with rubber, when the magnet 5 to be coated with rubber is in the preset position, the magnetic part 41 stops driving the magnet 5 to be coated with rubber to move; when the magnet 5 to be coated with rubber is not in the preset position and the magnet 5 to be coated with rubber passes the preset position, the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber is reduced, and the magnet 5 to be coated with rubber moves closer to the preset position; when the magnet 5 to be coated with rubber is not in the preset position and the magnet 5 to be coated with rubber does not pass the preset position, the driving force of the magnetic part 41 on the magnet 5 to be coated with rubber is increased, and the magnet 5 to be coated with rubber moves closer to the preset position. Such an arrangement enables the magnet 5 to be coated with rubber to move accurately to the preset position.

[0085] In some embodiments of the present application, judging whether the magnet 5 to be coated has passed through the position detection member 22 includes the following steps: S2331. Detect the triggering state of the position detection member 22, and determine whether the position detection member 22 is triggered according to the triggering state. Specifically, when the magnet 5 to be coated with glue passes through the position detection member 22, the position detection member 22 is triggered. By detecting whether the position detection member 22 is triggered, it is determined whether the magnet 5 to be coated with glue passes through the position detection member 22.

[0086] S2332. If the position detection element 22 is triggered, it is determined that the magnet 5 to be coated has passed through the position detection element 22. Specifically, when the position detection element 22 is triggered, it is determined that the magnet 5 to be coated has passed through the position detection element 22, that is, the magnet 5 to be coated has passed through the preset position.

[0087] S2332. If the position detection member 22 is not triggered, it is determined that the magnet 5 to be coated with glue has not passed through the position detection member 22. Specifically, when the position detection member 22 is not triggered, it is determined that the magnet 5 to be coated with glue has not passed through the position detection member 22, that is, the magnet 5 to be coated with glue has not passed through the preset position.

[0088] By detecting the triggering state of the position detection member 22 and judging whether the position detection member 22 is triggered according to the triggering state, it is possible to identify whether the magnet 5 to be coated with glue passes through the preset position, and then the driving force of the magnetic member 41 on the magnet 5 to be coated with glue can be adjusted according to the actual position of the magnet 5 to be coated with glue, so that the magnet 5 to be coated with glue can move to the preset position.

[0089] In some embodiments of the present application, before the magnetic member 41 provided in the injection mold 100 is used to drive the magnet 5 to be coated with plastic to move closer to or away from the magnetic member 41, the manufacturing process of the magnet coated part further includes the following steps: S5. When the magnetic member 41 is configured as a magnet, the first mold 1 and the second mold 2 are driven to move close to the mounting plate 4. Specifically, refer to Figure 2 and Figure 3 After the magnet 5 to be coated with glue is placed in the injection cavity 3 and the first mold 1 and the second mold 2 are stopped, the first mold 1 and the second mold 2 are driven to move close to the mounting plate 4, and the second mold 2 is stopped with the mounting plate 4, thereby reducing the distance between the magnet 5 to be coated with glue and the magnetic part 41, and avoiding that the distance between the magnet 5 to be coated with glue and the magnetic part 41 is too large, resulting in the magnetic part 41 being unable to drive the magnet 5 to be coated with glue to the preset position, thereby improving the reliability of the manufacturing process of iron coated parts.

[0090] Furthermore, when the magnetic component 41 is constructed as an electromagnet, before the magnet 5 to be encapsulated is placed in the injection molding cavity 3, the magnetic component 41 is powered off so that the magnetic component 41 cannot generate a magnetic field, and the first mold 1 and the second mold 2 do not need to move away from the mounting plate 4. After the magnet 5 to be encapsulated is placed in the injection molding cavity 3 and the first mold 1 and the second mold 2 are stopped, the magnetic component 41 is powered on so that the magnetic component 41 generates a magnetic field, and the magnetic component 41 drives the magnet 5 to be encapsulated to move to a preset position.

[0091] Reference Figure 2 and Figure 3 In some embodiments of the present application, the magnetic member 41 is protruding toward the second mold 2, and the end wall of the second mold 2 close to the mounting plate 4 is provided with a receiving hole 23. The magnetic member 41 is opposite to the receiving hole 23, and the magnetic member 41 is suitable for extending into or moving out of the receiving hole 23.

[0092] Specifically, along the opening and closing direction of the injection mold 100, the upper end of the magnetic part 41 is protruded toward the second mold 2, that is, the upper end of the magnetic part 41 protrudes from the upper end of the mounting plate 4, and the lower end of the second mold 2 is provided with a receiving hole 23. When the magnet 5 to be coated with glue is placed in the injection cavity 3 and the first mold 1 and the second mold 2 are stopped, the first mold 1 and the second mold 2 are driven to move close to the mounting plate 4, and the upper end of the magnetic part 41 extends into the receiving hole 23, so that the distance between the magnetic part 41 and the magnet 5 to be coated with glue can be shortened, and the magnetic field strength of the magnetic part 41 at the magnet 5 to be coated with glue can be increased, and the magnetic part 41 can better drive the magnet 5 to be coated with glue to move.

[0093] When the first mold 1 and the second mold 2 both move away from the mounting plate 4 , the upper end of the magnetic member 41 moves out of the receiving hole 23 .

[0094] Reference Figure 2 In some embodiments of the present application, there are multiple magnets 5 to be coated with glue and multiple magnetic parts 41, and the multiple magnets 5 to be coated with glue and the multiple magnetic parts 41 are arranged in sequence along the radial direction of the injection mold 100 at intervals, and the multiple magnets 5 to be coated with glue and the multiple magnetic parts 41 are arranged one by one.

[0095] Specifically, multiple magnets can be arranged in the rubber-coated magnet parts to improve the magnetic attraction ability of the rubber-coated magnet parts. By arranging multiple magnetic parts 41 and arranging multiple magnetic parts 41 in one-to-one correspondence with multiple magnets 5 to be coated with rubber, the magnetic parts 41 drive the corresponding magnets 5 to be coated with rubber to move to the preset position, thereby achieving the technical effect that multiple magnetic parts 41 simultaneously drive the corresponding magnets 5 to be coated with rubber to move to the preset position.

[0096] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A manufacturing process for a magnet encapsulated plastic part, characterized in that: include: The magnet to be coated with glue is placed in the injection cavity of the injection mold, wherein the magnet to be coated with glue is movably arranged in the injection cavity and is limitedly matched with the injection mold, wherein the injection mold is non-magnetic, and along the opening and closing direction of the injection mold, the height dimension of the injection cavity is greater than the thickness dimension of the magnet to be coated with glue; Using a magnetic part provided in the injection mold to drive the magnet to be coated with glue to move closer to or away from the magnetic part, so that the magnet to be coated with glue is located at a preset position in the injection mold cavity, wherein the magnet to be coated with glue is arranged opposite to the magnetic part; Injecting molding material into the injection molding cavity; Output magnet encapsulated parts.

2. The manufacturing process of a magnet-coated plastic part according to claim 1, characterized in that: The injection mold includes a first mold, a second mold and a mounting plate. Along the opening and closing direction of the injection mold, the second mold is located between the first mold and the mounting plate, and the first mold, the second mold and the mounting plate are arranged relative to each other. The magnetic part is arranged on the mounting plate. The second mold is suitable for abutting against the first mold and the mounting plate. The first mold is provided with a first molding cavity near the end wall of the second mold, and the second mold is provided with a second molding cavity near the end wall of the first mold. The first molding cavity and the second molding cavity are suitable for defining the injection cavity. The first mold or the second mold is provided with a position detection component, and the position detection component is suitable for being opposite to the magnet to be coated and used to detect the position of the magnet to be coated.

3. The manufacturing process of a magnet-coated plastic part according to claim 2, characterized in that: The first molding cavity is provided with a first limiting groove, the second molding cavity is provided with a second limiting groove, the first limiting groove and the second limiting groove are opposite to each other and are suitable for being connected, and a sliding channel is suitable for being defined between the first limiting groove and the second limiting groove; The method of placing the magnet to be coated with glue in the injection cavity of the injection mold, wherein the magnet to be coated with glue is movably arranged in the injection cavity and is limitedly matched with the injection mold, comprises: driving the first mold to move away from the second mold; Placing the magnet to be coated with rubber in the second limiting groove; The first mold is driven to move close to the second mold, the magnet to be coated with glue is located in the sliding channel and is suitable for moving along the sliding channel, and the magnet to be coated with glue is limitedly matched with the first limiting groove and the second limiting groove.

4. The manufacturing process of a magnet-coated plastic part according to claim 2, characterized in that: Before driving the first mold to move away from the second mold, the method further includes: When the magnetic member is configured as a magnet, the first mold and the second mold are driven to move away from the mounting plate.

5. The manufacturing process of a magnet encapsulated plastic part according to claim 2, characterized in that: The method of using the magnetic part provided in the injection mold to drive the magnet to be coated with glue to move closer to or away from the magnetic part so that the magnet to be coated with glue is located at a preset position in the injection mold cavity includes: When the magnetic poles of the magnet to be coated with glue approach the mounting plate and repel the magnetic poles of the magnetic component, the magnetic component is used to drive the magnet to be coated with glue to move away from the magnetic component to the preset position; When the magnetic poles of the magnet to be coated with glue approaching the mounting plate are attracted to the magnetic poles of the magnetic component, the magnetic component is used to drive the magnet to be coated with glue to move close to the magnetic component to the preset position; Detect whether the magnet to be coated with glue is located at a preset position.

6. The manufacturing process of a magnet-coated plastic part according to claim 5, characterized in that: The step of detecting whether the magnet to be coated with rubber is located at a preset position includes: Detecting the position of the magnet to be coated with glue based on the position detection component, and then judging whether the magnet to be coated with glue is opposite to the position detection component; If the magnet to be coated with glue is opposite to the position detection member, stop driving the magnet to be coated with glue to move; If the magnet to be coated with glue is not opposite to the position detection component, determining whether the magnet to be coated with glue has passed through the position detection component; If the magnet to be coated with glue passes through the position detection component, the driving force of the magnetic component on the magnet to be coated with glue is reduced to make the magnet to be coated with glue move closer to the position detection component; If the magnet to be coated with glue has not passed through the position detection component, the driving force of the magnetic component on the magnet to be coated with glue is increased to make the magnet to be coated with glue move closer to the position detection component.

7. The manufacturing process of a magnet-coated plastic part according to claim 6, characterized in that: The step of judging whether the magnet to be coated with glue has passed through the position detection element comprises: detecting a triggering state of the position detecting element, and determining whether the position detecting element is triggered according to the triggering state; If the position detection element is triggered, it is determined that the magnet to be coated has passed through the position detection element; If the position detection element is not triggered, it is determined that the magnet to be coated with rubber has not passed through the position detection element.

8. The manufacturing process of a magnet-coated plastic part according to claim 2, characterized in that: Before using the magnetic part provided in the injection mold to drive the magnet to be coated with plastic to move closer to or away from the magnetic part, the method further includes: When the magnetic member is configured as a magnet, the first mold and the second mold are driven to move close to the mounting plate.

9. The manufacturing process of a magnet-coated plastic part according to claim 8, characterized in that: The magnetic member is protruding toward the second mold. The second mold is provided with a receiving hole on an end wall close to the mounting plate. The magnetic member is opposite to the receiving hole and is suitable for extending into or moving out of the receiving hole.

10. The manufacturing process of a magnet-coated plastic part according to claim 2, characterized in that: There are multiple magnets to be coated with glue and multiple magnetic parts, and the multiple magnets to be coated with glue and multiple magnetic parts are arranged in sequence along the radial direction of the injection mold at intervals, and the multiple magnets to be coated with glue and multiple magnetic parts are arranged in one-to-one correspondence.

Images