Manufacturing process of magnet encapsulated parts

Abstract

The application discloses a manufacturing process of a magnet encapsulated part, and the manufacturing process comprises the following steps: placing a magnet to be encapsulated into an injection molding cavity of an injection mold, and movably arranging the magnet to be encapsulated in the injection molding cavity and limiting the magnet to be encapsulated in cooperation with the injection mold, wherein the injection mold does not have magnetism, the height size of the injection molding cavity is greater than the thickness size of the magnet to be encapsulated along the opening and closing direction of the injection mold; driving the magnet to be encapsulated to move close to or away from a magnetic part arranged on the injection mold by the magnetic part, so that the magnet to be encapsulated is located at a preset position in the injection molding cavity, wherein the magnet to be encapsulated is arranged opposite to the magnetic part; injecting an injection material into the injection molding cavity; and outputting the magnet encapsulated part. The application can prevent the magnet to be encapsulated beyond the preset thickness size range from being cracked by the injection mold or being completely encapsulated by the injection material.

Description

TECHNICAL FIELD

[0001] The application relates to the field of magnet rubber-coated part forming, in particular to a manufacturing process of a magnet rubber-coated part. BACKGROUND

[0002] In the related art, in order to avoid the magnetic attraction capability of the magnet rubber-coated part from failing to reach a preset index, the magnet in the magnet rubber-coated part cannot be completely covered by the injection molding material, and one end wall of the magnet needs to be exposed to the external environment, and during the rubber-coating process of the magnet, the magnet cannot move in the injection molding cavity, so the height size of the injection molding cavity of the injection molding mold needs to match the thickness size of the magnet, so that the magnet is in abutment with the inner wall of the injection molding cavity, and the injection molding material can be prevented from being wrapped outside the end wall in abutment between the magnet and the inner wall of the injection molding cavity.

[0003] During the manufacturing of the magnet, it is difficult to control the thickness size of all the magnets within a preset thickness size range, when the thickness size of the magnet is greater than the maximum value of the preset thickness size range, the magnet will be cracked when the injection molding mold is closed, resulting in the magnet being scrapped, and when the thickness size of the magnet is less than the minimum value of the preset thickness size range, the magnet cannot be in abutment with the inner wall of the injection molding cavity, and the magnet is completely covered by the injection molding material, thereby reducing the magnetic attraction capability of the magnet rubber-coated part and the product quality of the magnet rubber-coated part. SUMMARY

[0004] In order to prevent the magnet exceeding the preset thickness size range from being cracked by the injection molding mold or being completely covered by the injection molding material, the application provides a manufacturing process of a magnet rubber-coated part.

[0005] The manufacturing process of the magnet rubber-coated part provided by the application adopts the following technical scheme:

[0006] A manufacturing process of a magnet rubber-coated part, comprising the following steps: placing a magnet to be rubber-coated in an injection molding cavity of an injection molding mold, the magnet to be rubber-coated being movably arranged in the injection molding cavity and being in limiting cooperation with the injection molding mold, wherein the injection molding mold does not have magnetism, and the height size of the injection molding cavity is greater than the thickness size of the magnet to be rubber-coated along the opening and closing direction of the injection molding mold; driving the magnet to be rubber-coated to move close to or away from a magnetic part arranged in the injection molding mold by the magnetic part, so that the magnet to be rubber-coated is located at a preset position in the injection molding cavity, wherein the magnet to be rubber-coated is arranged opposite to the magnetic part; injecting an injection molding material into the injection molding cavity; and outputting a magnet rubber-coated part.

[0007] By adopting the technical scheme, the to-be-coated magnet is movably arranged in the injection molding cavity of the injection mold, and then the magnetic member is used to drive the to-be-coated magnet to move to the preset position of the to-be-coated magnet in the injection molding cavity. One end wall of the to-be-coated magnet is in abutment with the inner top wall or the inner bottom wall of the injection molding cavity in the opening and closing direction of the injection mold. Compared with the prior art, the to-be-coated magnet exceeding the preset thickness size range can be prevented from being cracked by the injection mold or being completely coated by the injection material.

[0008] Preferably, the injection mold comprises a first mold, a second mold and a mounting plate. The second mold is located between the first mold and the mounting plate in the opening and closing direction of the injection mold, and the first mold, the second mold and the mounting plate are relatively arranged in pairs. The magnetic member is arranged on the mounting plate. The second mold is adapted to abut against the first mold and the mounting plate. The first mold is provided with a first forming cavity at one end wall close to the second mold. The second mold is provided with a second forming cavity at one end wall close to the first mold. The first forming cavity and the second forming cavity are adapted to define the injection molding cavity. The first mold or the second mold is provided with a position detection member adapted to be opposite to the to-be-coated magnet and used for detecting the position of the to-be-coated magnet.

[0009] By adopting the technical scheme, the position of the to-be-coated magnet is detected by the position detection member, so that the injection machine can be prevented from injecting the injection material into the injection molding cavity when the to-be-coated magnet has not moved to the preset position. Thus, the to-be-coated magnet can be prevented from being completely coated by the injection material, and the product quality of the magnet coated part can be improved.

[0010] Preferably, the first forming cavity is provided with a first limiting groove, and the second forming cavity is provided with a second limiting groove. The first limiting groove and the second limiting groove are opposite and adapted to be connected. The first limiting groove and the second limiting groove are adapted to define a sliding channel.

[0011] The to-be-coated magnet is placed in the injection molding cavity of the injection mold. The to-be-coated magnet is movably arranged in the injection molding cavity and limitedly matched with the injection mold. The method comprises the following steps: driving the first mold to move away from the second mold; placing the to-be-coated magnet in the second limiting groove; driving the first mold to move close to the second mold. The to-be-coated magnet is located in the sliding channel and adapted to move along the sliding channel. The to-be-coated magnet is limitedly matched with the first limiting groove and the second limiting groove.

[0012] By adopting the above technical solution, the magnet to be coated is placed in the second limiting groove, and then the first mold is driven to move closer to the second mold. The magnet to be coated is located in the sliding channel and is limited and matched with both the first and second limiting grooves. When the magnet to be coated moves along the sliding channel, both the first and second limiting grooves limit the magnet to be coated, which can prevent the magnet to be coated from deviating from the preset position. This can prevent the magnet in the coated part from not being in the preset position, which would cause the coated part to be unusable, thereby improving the product quality of the coated part.

[0013] Preferably, before driving the first mold away from the second mold, the manufacturing process of the magnetic coated part further includes the following steps: when the magnetic component is constructed as a magnet, driving both the first mold and the second mold away from the mounting plate.

[0014] By adopting the above technical solution, it is possible to avoid the magnetic poles of the magnetic component and the magnetic poles of the magnet to be coated repulsed when the magnet to be coated is placed in the second molding cavity. The magnetic component applies a repulsive force to the magnet to be coated, and under the action of the repulsive force, the magnet to be coated moves away from the magnetic component and detaches from the second mold, thereby avoiding the inability to place the magnet to be coated in the second molding cavity.

[0015] Preferably, the step of using a magnetic component disposed on the injection mold to drive the magnet to be coated to move closer to or away from the magnetic component, so that the magnet to be coated is located at a preset position within the injection cavity, includes the following steps: when the magnetic pole of the magnet to be coated near the mounting plate repels the magnetic pole of the magnetic component, the magnetic component drives the magnet to be coated away from the magnetic component to the preset position; when the magnetic pole of the magnet to be coated near the mounting plate attracts the magnetic pole of the magnetic component, the magnetic component drives the magnet to be coated near the magnetic component to the preset position; and detecting whether the magnet to be coated is located at the preset position.

[0016] By adopting the above technical solution, based on the principle that like magnetic poles repel and unlike magnetic poles attract, when the magnet to be coated repels the magnetic component, the magnetic component drives the magnet to be coated away from the magnetic component to move to a preset position. When the magnet to be coated attracts the magnetic component, the magnetic component drives the magnet to be coated closer to the magnetic component to move to a preset position. Then, it is detected whether the magnet to be coated has moved to the preset position. When the magnet to be coated is in the preset position, the magnetic component stops driving the magnet to be coated to move. Then, the injection molding machine injects injection molding material into the injection cavity, thereby performing the coating process on the magnet to be coated.

[0017] Preferably, detecting whether the magnet to be coated is located at a preset position includes the following steps: detecting the position of the magnet to be coated based on the position detection component, and then determining whether the magnet to be coated is opposite to the position detection component; if the magnet to be coated is opposite to the position detection component, stopping the movement of the magnet to be coated; if the magnet to be coated is not opposite to the position detection component, determining whether the magnet to be coated has passed the position detection component; if the magnet to be coated has passed the position detection component, reducing the driving force of the magnetic component on the magnet to be coated, so that the magnet to be coated moves closer to the position detection component; if the magnet to be coated has not passed the position detection component, increasing the driving force of the magnetic component on the magnet to be coated, so that the magnet to be coated moves closer to the position detection component.

[0018] By adopting the above technical solution, the position of the magnet to be coated is detected by a position detection component. When the magnet to be coated is in a preset position, the magnetic component stops driving the magnet to move. When the magnet to be coated is not in the preset position but has passed 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 but has not passed 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. This setting allows the magnet to be coated to move accurately to the preset position.

[0019] Preferably, determining whether the magnet to be coated has passed the position detection element includes the following steps: detecting the triggering state of the position detection element, and determining whether the position detection element has been triggered based on the triggering state; if the position detection element is triggered, then determining that the magnet to be coated has passed the position detection element; if the position detection element is not triggered, then determining that the magnet to be coated has not passed the position detection element.

[0020] By adopting the above technical solution, by detecting the triggering state of the position detection component, and determining whether the position detection component has been triggered based on the triggering state, it is possible to identify whether the magnet to be coated has passed through the preset position. Then, the driving force of the magnetic component on the magnet to be coated can be adjusted according to the actual position of the magnet to be coated, so that the magnet to be coated can move to the preset position.

[0021] Preferably, before the magnetic component provided in the injection mold drives the magnet to be coated to move closer to or away from the magnetic component, the manufacturing process of the magnet coated part further includes the following step: when the magnetic component is constructed as a magnet, drive both the first mold and the second mold to move closer to the mounting plate.

[0022] By adopting the above technical solution, the distance between the magnet to be coated and the magnetic component can be reduced, which can avoid the magnetic component being unable to drive the magnet to be coated to the preset position due to the excessive distance between the magnet to be coated and the magnetic component, thereby improving the reliability of the manufacturing process of iron-coated parts.

[0023] Preferably, the magnetic component protrudes towards the second mold, and the second mold has a receiving hole on its end wall near the mounting plate. The magnetic component is opposite to the receiving hole and is adapted to extend into or move out of the receiving hole.

[0024] By adopting the above technical solution, when the magnet to be coated is placed in the injection molding cavity, and the first mold and the second mold stop, the first mold and the second mold are driven to move closer to the mounting plate. The upper end of the magnetic component extends into the receiving hole, thereby shortening the distance between the magnetic component and the magnet to be coated, increasing the magnetic field strength of the magnetic component at the magnet to be coated, and enabling the magnetic component to better drive the movement of the magnet to be coated.

[0025] Preferably, there are multiple magnets to be coated and multiple magnetic components, and the multiple magnets to be coated and multiple magnetic components are arranged sequentially and spaced apart along the radial direction of the injection mold, with each of the multiple magnets to be coated and multiple magnetic components corresponding to one another.

[0026] By adopting the above technical solution, and by setting multiple magnetic components and setting multiple magnetic components in one-to-one correspondence with multiple magnets to be coated, the magnetic components drive the corresponding magnets to be coated to move to a preset position, thereby achieving the technical effect of multiple magnetic components simultaneously driving the corresponding magnets to be coated to move to the preset position.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By movably placing the magnet to be coated within the injection molding cavity, and then using a magnetic component to drive the magnet to a preset position within the cavity, one end wall of the magnet abuts against the inner top or bottom wall of the injection molding cavity along the opening and closing direction of the injection mold. Compared with the prior art, this application can prevent the magnet to be coated from being cracked by the injection mold or completely covered by the injection molding material if it exceeds the preset thickness range.

[0029] 2. This application can avoid the magnetic poles of the magnetic component and the magnetic poles of the magnet to be coated repulsed when the magnet to be coated is placed in the second molding cavity. 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.

[0030] 3. When the magnet to be coated is placed in the injection cavity and the first mold and the second mold stop, the first mold and the second mold are driven to move closer to the mounting plate. The upper end of the magnetic component extends into the receiving hole, thereby shortening the distance between the magnetic component and the magnet to be coated. This can increase the magnetic field strength of the magnetic component at the magnet to be coated, and the magnetic component can better drive the magnet to be coated to move. Attached Figure Description

[0031] Figure 1 This is a flowchart of the manufacturing process of the magnet-coated parts according to the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of an injection mold according to an embodiment of this application;

[0033] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0034] Figure 4 This is a schematic diagram of the first mold according to an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the second mold according to an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Injection molds;

[0038] 1. First mold; 11. First molding cavity; 111. First limiting groove; 112. Sliding channel; 113. First wall surface;

[0039] 2. Second mold; 21. Second molding cavity; 211. Second limiting groove; 212. Second wall surface; 22. Position detection component; 23. Receiving hole;

[0040] 3. Injection molding cavity;

[0041] 4. Mounting plate; 41. Magnetic components;

[0042] 5. Magnets to be coated with glue. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0044] This application discloses a manufacturing process for a magnetically coated part.

[0045] Reference Figures 1-3 The manufacturing process of the magnet-coated parts according to the embodiments of this application includes the following steps:

[0046] S1. Place the magnet 5 to be coated into the injection cavity 3 of the injection mold 100. The magnet 5 to be coated is movably set in the injection cavity 3 and is limited and matched with the injection mold 100.

[0047] Specifically, the injection mold 100 is opened, and the magnet 5 to be coated is placed inside the injection mold 100. Then the injection mold 100 is closed so that the magnet 5 to be coated is located inside 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.

[0048] Furthermore, by limiting the fit between the magnet 5 to be coated and the injection mold 100, it is possible to prevent the magnet 5 to be coated from deviating from the preset position when it moves in the injection cavity 3, thus preventing the magnet in the coated part from being scrapped due to the magnet not being in the preset position.

[0049] Furthermore, the injection mold 100 is not magnetic. When the magnet 5 to be coated is placed in the injection cavity 3, it can prevent the magnet 5 to be coated from being attracted to the injection mold 100, thereby preventing the magnet 5 to be coated from being unable to move in the injection cavity 3.

[0050] 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 coated.

[0051] It should be noted that the injection mold 100 is made of non-magnetic steel. In some specific embodiments, the grade of non-magnetic steel can be 20Mn23AlV, but this application is not limited to this. The grade of non-magnetic steel can also be 45Mn17Al3.

[0052] S2. The magnetic component 41 provided on the injection mold 100 is used to drive the magnet 5 to be coated to move closer to or away from the magnetic component 41, so that the magnet 5 to be coated is located in a preset position in the injection cavity 3, wherein the magnet 5 to be coated is arranged opposite to the magnetic component 41.

[0053] Specifically, after the magnet 5 to be coated is placed in the injection cavity 3 and the injection mold 100 is closed, the magnet 5 to be coated is driven by the magnetic component 41 to move closer to or away from the magnetic component 41 to a preset position.

[0054] 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 with opposite sides. The magnet 5 to be coated 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.

[0055] In some specific embodiments, the preset position of the magnet 5 to be coated within the injection molding cavity 3 can be the position of the magnet 5 to be coated within the injection molding cavity 3 when it abuts against the first wall surface 113. In other specific embodiments, the preset position of the magnet 5 to be coated within the injection molding cavity 3 can also be the position of the magnet 5 to be coated within the injection molding cavity 3 when it abuts against the second wall surface 212. In still other specific embodiments, the preset position of the magnet 5 to be coated within the injection molding cavity 3 can also be the position of the magnet 5 to be coated within the injection molding cavity 3 when it does not abut against either the first wall surface 113 or the second wall surface 212.

[0056] In some specific embodiments, the magnetic element 41 may be located above or below the magnet 5 to be coated.

[0057] In some specific embodiments, the preset position of the magnet to be coated 5 in the injection molding cavity 3 is configured such that when the magnet to be coated 5 abuts against the first wall surface 113, the first wall surface 113 is located above the magnet to be coated 5, and the magnetic element 41 is located below the magnet to be coated 5. After the magnet to be coated 5 is placed in the injection molding cavity 3 and the injection mold 100 is closed, the magnetic element 41 drives the magnet to be coated 5 to move away from the magnetic element 41 so that the magnet to be coated 5 abuts against the first wall surface 113.

[0058] In some specific embodiments, the magnetic component 41 can be an electromagnet, but this application is not limited to this. The magnetic component 41 can also be a magnet or the like. It should be noted that the magnetic component 41 drives the magnet 5 to be coated to move by magnetic force, and the magnetic component 41 does not apply magnetic force to the magnet 5 to be coated during the process of placing the magnet 5 to be coated into the injection molding cavity 3.

[0059] S3. Injecting injection material into the injection cavity 3. Specifically, after the magnet 5 to be coated is located in the preset position in the injection cavity 3, the injection molding machine injects injection material into the injection cavity 3 through the feed port and feed channel of the injection mold 100. The injection material covers the outside of the magnet 5 to be coated.

[0060] In some specific embodiments, the injection molding material can be polypropylene, but this application is not limited to this; the injection molding material can also be polycarbonate, etc.

[0061] S4. Output the magnet-coated part. Specifically, after the injection material in the injection cavity 3 has cooled and solidified, open the injection mold 100 and then take out the magnet-coated part from the injection mold 100.

[0062] Therefore, by movably positioning the magnet 5 to be coated within the injection cavity 3, and then using the magnetic component 41 to drive the magnet 5 to move to a preset position within the injection cavity 3, one end wall of the magnet 5 to be coated abuts against the inner top or bottom wall of the injection cavity 3 along the opening and closing direction of the injection mold 100. Compared with the prior art, this application can prevent the magnet 5 to be coated, exceeding the preset thickness range, from being cracked by the injection mold 100 or completely covered by the injection material.

[0063] Specifically, when the thickness of the magnet 5 to be coated is greater than the maximum value of the preset thickness range, the magnet 5 to be coated can be prevented from being crushed by the injection mold 100, thereby reducing the number of scrapped magnets 5. When the thickness of the magnet 5 to be coated is less than the minimum value of the preset thickness range, the magnet 5 to be coated can be prevented from failing to abut against the inner top wall or inner bottom wall of the injection cavity 3, thereby preventing the magnet 5 to be coated from being completely covered by the injection molding material, thereby preventing the reduction of the magnetic attraction ability of the magnet coated parts and improving the product quality of the magnet coated parts.

[0064] Reference Figures 2-5 In some embodiments of this 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 all arranged opposite to each other.

[0065] A magnetic component 41 is disposed at the end of the mounting plate 4 near the second mold 2. The second mold 2 is adapted to abut against both the first mold 1 and the mounting plate 4. The first mold 1 is provided with a first molding cavity 11 near the end wall of the second mold 2, and the second mold 2 is provided with a second molding cavity 21 near the end wall of the first mold 1. The first molding cavity 11 and the second molding cavity 21 are opposite to each other and adapted to be connected. The first molding cavity 11 and the second molding cavity 21 are adapted to define an injection cavity 3. Specifically, when the first mold 1 and the second mold 2 abut against each other, the first molding cavity 11 and the second molding cavity 21 define an injection cavity 3. 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.

[0066] In some specific embodiments, when the magnet 5 to be coated needs to abut against the first wall surface 113, the first mold 1 is driven to move away from the second mold 2, and then the magnet 5 to be coated is placed in the second molding cavity 21. Then the first mold 1 is driven to move closer to the second mold 2 so that the first mold 1 and the second mold 2 abut against each other. The magnet 5 to be coated is located in the injection molding cavity 3, and the magnet 5 to be coated is in a limited fit with both the first mold 1 and the second mold 2. Then the magnetic component 41 drives the magnet 5 to be coated to move away from the magnetic component 41, thereby achieving the technical effect of the magnet 5 to be coated abutting against the bottom wall of the first molding cavity 11.

[0067] In some other specific embodiments, when the magnet 5 to be coated needs to abut against the second wall surface 212, when the magnet 5 to be coated is placed in the injection molding 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 to move closer to the magnetic component 41 so that the magnet 5 to be coated is attached to the second wall surface 212.

[0068] 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.

[0069] Furthermore, the first mold 1 or the second mold 2 is provided with a position detection element 22. The position detection element 22 is spaced apart from the injection cavity 3. The position detection element 22 is adapted to be opposite to the magnet 5 to be coated and is used to detect the position of the magnet 5 to be coated. By using the position detection element 22 to detect the position of the magnet 5 to be coated, the injection molding machine can be prevented from injecting injection material into the injection cavity 3 when the magnet 5 to be coated has not moved to the preset position. This can prevent the magnet 5 to be coated from being completely covered by the injection material, thereby improving the product quality of the magnet coated parts.

[0070] 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; 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.

[0071] In some specific embodiments, the position detection element 22 is preferably a Hall sensor.

[0072] Reference Figures 2-5 In some embodiments of this 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 adapted to be connected. A sliding channel 112 is adapted to be defined between the first limiting groove 111 and the second limiting groove 211. Specifically, when the first mold 1 and the second mold 2 stop, 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.

[0073] The magnet 5 to be coated is placed in the injection cavity 3 of the injection mold 100. The magnet 5 to be coated is movably disposed in the injection cavity 3 and is limited and matched with the injection mold 100, including the following steps:

[0074] S11. Drive the first mold 1 away from the second mold 2. Specifically, the injection molding machine drives the first mold 1 away from the second mold 2.

[0075] S12. Place the magnet 5 to be coated into the second limiting groove 211. Specifically, the operator places the magnet 5 to be coated into the second limiting groove 211, and the magnet 5 to be coated into the second limiting groove 211 is limited and engaged.

[0076] S13. Drive the first mold 1 to move closer to the second mold 2. The magnet 5 to be coated is located in the sliding channel 112 and is suitable to move along the sliding channel 112. The magnet 5 to be coated is limited and engaged with the first limiting groove 111 and the second limiting groove 211. Specifically, when the first mold 1 is driven to move closer to the second mold 2, the first mold 1 and the second mold 2 stop against each other. 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 is located in the sliding channel 112. When the magnet 5 to be coated is driven by the magnetic component 41, the magnet 5 to be coated moves along the sliding channel 112 to a preset position in the injection cavity 3. When the magnet 5 to be coated 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.

[0077] By placing the magnet 5 to be coated in the second limiting groove 211, and then driving the first mold 1 to move closer to the second mold 2, the magnet 5 to be coated is located in the sliding channel 112 and is limited and engaged with both the first limiting groove 111 and the second limiting groove 211. When the magnet 5 to be coated moves along the sliding channel 112, both the first limiting groove 111 and the second limiting groove 211 limit the magnet 5 to be coated, which can prevent the magnet 5 to be coated from deviating from the preset position, and can prevent the magnet in the coated part from not being in the preset position, which would cause the coated part to be unusable, thereby improving the product quality of the coated part.

[0078] In some embodiments of this application, before driving the first mold 1 away from the second mold 2, the manufacturing process of the magnetically coated part further includes the following steps:

[0079] S14. When the magnetic component 41 is constructed as a magnet, it drives both the first mold 1 and the second mold 2 to move away from the mounting plate 4. Specifically, refer to... Figure 2 and Figure 3Before placing the magnet 5 to be coated into the injection cavity 3, the first mold 1 and the second mold 2 are driven to move away from the mounting plate 4. Then, the first mold 1 is driven to move away from the second mold 2. Finally, the magnet 5 to be coated is placed into the second molding cavity 21. This avoids the magnetic poles of the magnetic component 41 and the magnet 5 to be coated from repelling each other when the magnet 5 to be coated is placed into the second molding cavity 21. The magnetic component 41 applies a repulsive force to the magnet 5 to be coated. Under the action of the repulsive force, the magnet 5 to be coated moves away from the magnetic component 41 and detaches from the second mold 2. This avoids the inability to place the magnet 5 to be coated into the second molding cavity 21.

[0080] Furthermore, when the magnetic poles of the magnetic component 41 and the magnet 5 to be coated approach the magnetic poles of the magnetic component 41 and attract each other, the magnetic component 41 applies an attractive force to the magnet 5 to be coated. When the position of the magnet 5 to be coated needs to be adjusted, the magnet 5 to be coated 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.

[0081] Furthermore, when the magnetic component 41 is constructed as an electromagnet, before placing the magnet 5 to be coated into the injection cavity 3, the magnetic component 41 is de-energized so that the magnetic component 41 cannot generate a magnetic field. Neither the first mold 1 nor the second mold 2 needs 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 coated is placed into the second molding cavity 21.

[0082] In some embodiments of this application, a magnetic element 41 disposed on the injection mold 100 is used to drive the magnet 5 to be coated to move closer to or away from the magnetic element 41, so that the magnet 5 to be coated is located at a preset position within the injection cavity 3, including the following steps:

[0083] S21. When the magnetic pole of the magnet 5 to be coated approaches the mounting plate 4 and repels the magnetic pole of the magnetic component 41, the magnetic component 41 drives the magnet 5 to be coated to move away from the magnetic component 41 to a preset position. Specifically, refer to... Figure 3 When the magnetic pole of the magnet 5 to be coated close to the mounting plate 4 repels the magnetic pole of the magnetic component 41 close to the second mold 2, that is, when the magnetic pole of the magnet 5 to be coated close to the mounting plate 4 and the magnetic pole of the magnetic component 41 close to the second mold 2 are the same magnetic poles, the magnetic component 41 applies a repulsive force to the magnet 5 to be coated. Under the action of the repulsive force, the magnet 5 to be coated moves away from the magnetic component 41 to a preset position.

[0084] In some specific embodiments, the magnetic pole of the magnet 5 to be coated near the mounting plate 4 is N-pole, and the magnetic pole of the magnetic component 41 near the second mold 2 can also be N-pole.

[0085] S22. When the magnet 5 to be coated approaches the magnetic pole of the mounting plate 4 and is attracted to the magnetic pole of the magnetic component 41, the magnetic component 41 drives the magnet 5 to be coated to move towards the magnetic component 41 to a preset position. Specifically, refer to... Figure 3 When the magnetic pole of the magnet 5 to be coated is close to the mounting plate 4 and the magnetic pole of the magnetic component 41 is close to the second mold 2, that is, the magnetic pole of the magnet 5 to be coated is close to the mounting plate 4 and the magnetic pole of the magnetic component 41 is close to the second mold 2 are opposite magnetic poles, the magnetic component 41 applies an attractive force to the magnet 5 to be coated, and under the action of the attractive force, the magnet 5 to be coated moves to a preset position.

[0086] In some specific embodiments, the magnetic pole of the magnet 5 to be coated near the mounting plate 4 is N-level, and the magnetic pole of the magnetic component 41 near the second mold 2 can be S-level.

[0087] It should be noted that the magnetic pole of the magnetic component 41 near the second mold 2 remains fixed. The operator can adjust the magnetic pole of the magnet to be coated 5 near the mounting plate 4 according to the preset position of the magnet to be coated 5 in the injection cavity 3, so that the magnetic component 41 drives the magnet to be coated 5 to move closer to or away from the magnetic component 41.

[0088] S23. Check whether the magnet 5 to be coated is in the preset position. Specifically, refer to... Figure 2 The position detection component 22 detects whether the magnet 5 to be coated is in a preset position. When the magnet 5 to be coated is in the preset position, the magnetic component 41 stops driving the magnet 5 to be coated to move. Then the injection molding machine injects injection material into the injection cavity 3. When the magnet 5 to be coated is not in the preset position, the magnetic component 41 continues to drive the magnet 5 to be coated to move to the preset position.

[0089] Based on the principle of repulsion between like magnetic poles and attraction between unlike magnetic poles, when the magnet 5 to be coated repels the magnetic component 41, the magnetic component 41 drives the magnet 5 to move away from the magnetic component 41 to a preset position. When the magnet 5 to be coated attracts the magnetic component 41, the magnetic component 41 drives the magnet 5 to move closer to the magnetic component 41 to a preset position. Then, it is detected whether the magnet 5 to be coated has moved to the preset position. When the magnet 5 to be coated is in the preset position, the magnetic component 41 stops driving the magnet 5 to move. Then, the injection molding machine injects injection molding material into the injection cavity 3, thereby performing the coating process on the magnet 5 to be coated.

[0090] In some embodiments of this application, detecting whether the magnet 5 to be coated is located in a preset position includes the following steps:

[0091] S231. Based on the position detection component 22, the position of the magnet 5 to be coated is detected, and then it is determined whether the magnet 5 to be coated is opposite to the position detection component 22. Specifically, refer to... Figure 2The position detection component 22 is opposite to the preset position of the magnet 5 to be coated in the injection cavity 3. When the magnet 5 to be coated is opposite to the position detection component 22, the position detection component 22 is continuously triggered. By detecting the triggering state of the position detection component 22, it is determined whether the magnet 5 to be coated is opposite to the position detection component 22.

[0092] In some specific embodiments, the position detection element 22 is preferably a Hall sensor.

[0093] S232. If the magnet 5 to be coated is opposite to the position detection element 22, stop driving the magnet 5 to be coated to move. Specifically, when the position detection element 22 is continuously triggered, it is determined that the magnet 5 to be coated is opposite to the position detection element 22, and the magnetic element 41 stops driving the magnet 5 to be coated to move, thereby preventing the magnet 5 to be coated from deviating from the preset position.

[0094] S233. If the magnet 5 to be coated is not opposite to the position detection element 22, determine whether the magnet 5 to be coated has passed the position detection element 22. Specifically, when the position detection element 22 is not continuously triggered, determine that the magnet 5 to be coated is not opposite to the position detection element 22, and then determine whether the magnet 5 to be coated has passed the position detection element 22 based on the triggering state of the position detection element 22.

[0095] S234. If the magnet 5 to be coated passes the position detection element 22, the driving force of the magnetic element 41 on the magnet 5 to be coated is reduced so that the magnet 5 to be coated moves closer to the position detection element 22. Specifically, when the magnet 5 to be coated moves along the sliding channel 112 and passes the position detection element 22, the magnet 5 to be coated passes the preset position but is not in the preset position. That is to say, the driving force of the magnetic element 41 on the magnet 5 to be coated is too large, causing the magnet 5 to be coated to pass through the preset position. By reducing the driving force of the magnetic element 41 on the magnet 5 to be coated, the magnet 5 to be coated moves closer to the position detection element 22 so that the magnet 5 to be coated moves to the preset position.

[0096] In some specific embodiments, when the magnetic element 41 is constructed as an electromagnet, the driving force of the magnetic element 41 on the uncoated magnet 5 is reduced by reducing the current passing through the magnetic element 41.

[0097] In some specific embodiments, when the magnetic component 41 is constructed as a magnet, by driving the magnetic component 41 away from the second mold 2 to increase the distance between the magnetic component 41 and the magnet to be coated 5, the magnetic field strength of the magnetic component 41 at the magnet to be coated 5 is reduced, thereby reducing the driving force of the magnetic component 41 on the magnet to be coated 5.

[0098] It should be noted that the magnetic component 41 is slidably disposed on the mounting plate 4, and the magnetic component 41 is adapted to move closer to or further away from the second mold 2 along the opening and closing direction of the injection mold 100.

[0099] S235. If the magnet to be coated 5 does not pass the position detection element 22, the driving force of the magnetic element 41 on the magnet to be coated 5 is increased so that the magnet to be coated 5 moves closer to the position detection element 22. Specifically, when the magnet to be coated 5 moves along the sliding channel 112 and does not pass the position detection element 22, the magnet to be coated 5 has not passed the preset position and is not in the preset position. That is to say, the driving force of the magnetic element 41 on the magnet to be coated 5 is too small, causing the magnet to be coated 5 to not move to the preset position. By increasing the driving force of the magnetic element 41 on the magnet to be coated 5, the magnet to be coated 5 moves closer to the position detection element 22 so that the magnet to be coated 5 moves to the preset position.

[0100] In some specific embodiments, when the magnetic element 41 is constructed as an electromagnet, the driving force of the magnetic element 41 on the uncoated magnet 5 is increased by increasing the current passing through the magnetic element 41.

[0101] In some specific embodiments, when the magnetic component 41 is constructed as a magnet, by driving the magnetic component 41 to move closer to the second mold 2 to reduce the distance between the magnetic component 41 and the magnet to be coated 5, the magnetic field strength of the magnetic component 41 at the magnet to be coated 5 is enhanced, thereby increasing the driving force of the magnetic component 41 on the magnet to be coated 5.

[0102] Furthermore, the injection molding machine is equipped with indicator lights that can display green, red, and yellow. Both the position detection element 22 and the indicator lights are connected to an external controller. When the magnet 5 to be coated is opposite to the position detection element 22, the controller controls the indicator light to display green based on the detection signal from the position detection element 22. When the magnet 5 to be coated is not opposite to the position detection element 22 and has passed by the position detection element 22, the controller controls the indicator light to display yellow based on the detection signal from the position detection element 22. When the magnet 5 to be coated is not opposite to the position detection element 22 and has not passed by the position detection element 22, the controller controls the indicator light to display red based on the detection signal from the position detection element 22. The operator adjusts the driving force of the magnetic element 41 on the magnet 5 to be coated by observing the color displayed by the indicator light.

[0103] By using the position detection component 22 to detect the position of the magnet 5 to be coated, when the magnet 5 to be coated is in the preset position, the magnetic component 41 stops driving the magnet 5 to be coated. When the magnet 5 to be coated is not in the preset position and has passed the preset position, the driving force of the magnetic component 41 on the magnet 5 to be coated is reduced, and the magnet 5 to be coated moves closer to the preset position. When the magnet 5 to be coated is not in the preset position and has not passed the preset position, the driving force of the magnetic component 41 on the magnet 5 to be coated is increased, and the magnet 5 to be coated moves closer to the preset position. This setting allows the magnet 5 to be coated to move accurately to the preset position.

[0104] In some embodiments of this application, determining whether the magnet 5 to be coated has passed the position detection element 22 includes the following steps:

[0105] S2331. Detect the triggering state of the position detection element 22. Determine whether the position detection element 22 is triggered based on the triggering state. Specifically, when the magnet 5 to be coated passes through the position detection element 22, the position detection element 22 is triggered. Determine whether the magnet 5 to be coated has passed through the position detection element 22 by detecting whether the position detection element 22 is triggered.

[0106] 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.

[0107] S2332. If the position detection element 22 is not triggered, it is determined that the magnet 5 to be coated has not passed the position detection element 22. Specifically, when the position detection element 22 is not triggered, it is determined that the magnet 5 to be coated has not passed the position detection element 22, that is, the magnet 5 to be coated has not passed the preset position.

[0108] By detecting the trigger state of the position detection element 22, it can be determined whether the position detection element 22 has been triggered, thereby identifying whether the magnet to be coated 5 has passed through the preset position. Then, the driving force of the magnetic element 41 on the magnet to be coated 5 can be adjusted according to the actual position of the magnet to be coated 5, so that the magnet to be coated 5 can move to the preset position.

[0109] In some embodiments of this application, before the magnetic element 41 disposed in the injection mold 100 drives the magnet 5 to be coated to move closer to or away from the magnetic element 41, the manufacturing process of the magnet-coated part further includes the following steps:

[0110] S5. When the magnetic component 41 is constructed as a magnet, it drives both the first mold 1 and the second mold 2 to move closer to the mounting plate 4. Specifically, refer to... Figure 2 and Figure 3 After the magnet 5 to be coated 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 closer to the mounting plate 4. The second mold 2 stops with the mounting plate 4, thereby reducing the distance between the magnet 5 to be coated and the magnetic component 41. This avoids the magnetic component 41 being unable to drive the magnet 5 to be coated to the preset position due to the excessive distance between the magnet 5 to be coated and the magnetic component 41, thereby improving the reliability of the manufacturing process of the iron-coated parts.

[0111] Furthermore, when the magnetic component 41 is constructed as an electromagnet, before placing the magnet 5 to be coated into the injection molding cavity 3, the magnetic component 41 is de-energized so that the magnetic component 41 cannot generate a magnetic field, and neither the first mold 1 nor the second mold 2 needs to move away from the mounting plate 4. After the magnet 5 to be coated into the injection molding cavity 3 is placed and the first mold 1 and the second mold 2 stop, the magnetic component 41 is energized so that the magnetic component 41 generates a magnetic field, and the magnetic component 41 drives the magnet 5 to be coated into the preset position.

[0112] Reference Figure 2 and Figure 3 In some embodiments of this application, the magnetic component 41 protrudes toward the second mold 2, and the second mold 2 has a receiving hole 23 on the end wall near the mounting plate 4. The magnetic component 41 is opposite to the receiving hole 23, and the magnetic component 41 is adapted to extend into or move out of the receiving hole 23.

[0113] Specifically, along the opening and closing direction of the injection mold 100, the upper end of the magnetic component 41 protrudes towards the second mold 2. That is, the upper end of the magnetic component 41 protrudes from the upper end of the mounting plate 4. The lower end of the second mold 2 is provided with a receiving hole 23. When the magnet 5 to be coated is placed in the injection cavity 3, and the first mold 1 and the second mold 2 stop, the first mold 1 and the second mold 2 are driven to move closer to the mounting plate 4. The upper end of the magnetic component 41 extends into the receiving hole 23, thereby shortening the distance between the magnetic component 41 and the magnet 5 to be coated, and increasing the magnetic field strength of the magnetic component 41 at the magnet 5 to be coated. The magnetic component 41 can better drive the magnet 5 to be coated.

[0114] When both the first mold 1 and the second mold 2 move away from the mounting plate 4, the upper end of the magnetic component 41 moves out of the receiving hole 23.

[0115] Reference Figure 2 In some embodiments of this application, there are multiple magnets 5 to be coated and multiple magnetic components 41. The multiple magnets 5 to be coated and multiple magnetic components 41 are arranged sequentially at intervals along the radial direction of the injection mold 100, and the multiple magnets 5 to be coated and multiple magnetic components 41 are arranged in a one-to-one correspondence.

[0116] Specifically, multiple magnets can be provided in the magnetically coated parts to improve the magnetic attraction ability of the magnetically coated parts. By setting multiple magnetic components 41 and setting multiple magnetic components 41 in one-to-one correspondence with multiple magnets 5 to be coated, the magnetic components 41 drive the corresponding magnets 5 to be coated to move to a preset position, thereby achieving the technical effect of multiple magnetic components 41 simultaneously driving the corresponding magnets 5 to be coated to move to the preset position.

[0117] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A manufacturing process of a magnet encapsulated part, characterized by, The method comprises the following steps: Placing the magnet to be encapsulated in the injection cavity of the injection mold, the magnet to be encapsulated is movably arranged in the injection cavity and limitedly matched with the injection mold, wherein the injection mold does not have magnetism, and the height dimension of the injection cavity is greater than the thickness dimension of the magnet to be encapsulated along the opening and closing direction of the injection mold; The injection mold comprises a first mold, a second mold and a mounting plate, the second mold is located between the first mold and the mounting plate along the opening and closing direction of the injection mold, and the first mold, the second mold and the mounting plate are oppositely arranged in pairs, and the magnetic member is arranged on the mounting plate, Driving the magnet to be encapsulated to move close to or away from the magnetic member by using the magnetic member arranged on the injection mold, so that the magnet to be encapsulated is located at a preset position in the injection cavity, wherein the magnet to be encapsulated is oppositely arranged with the magnetic member; Injecting injection material into the injection cavity; Outputting the magnet encapsulation part.

2. The manufacturing process of a magnet encapsulated part according to claim 1, wherein, The second mold is adapted to abut against the first mold and the mounting plate, the end wall close to the second mold of the first mold is provided with a first forming cavity, the end wall close to the first mold of the second mold is provided with a second forming cavity, the first forming cavity and the second forming cavity are adapted to define the injection cavity, and the first mold or the second mold is provided with a position detection member, the position detection member is adapted to be opposite to the magnet to be encapsulated and is used for detecting the position of the magnet to be encapsulated.

3. The manufacturing process of a magnet encapsulated part according to claim 2, wherein, The first forming cavity is provided with a first limiting groove, the second forming cavity is provided with a second limiting groove, the first limiting groove and the second limiting groove are oppositely and adaptively connected, and the first limiting groove and the second limiting groove are adapted to define a sliding channel therebetween; The magnet to be encapsulated is placed in the injection cavity of the injection mold, the magnet to be encapsulated is movably arranged in the injection cavity and limitedly matched with the injection mold, comprising: Driving the first mold to move away from the second mold; Placing the magnet to be encapsulated in the second limiting groove; Driving the first mold to move close to the second mold, the magnet to be encapsulated is located in the sliding channel and is adapted to move along the sliding channel, and the magnet to be encapsulated is limitedly matched with the first limiting groove and the second limiting groove.

4. The manufacturing process of a magnet encapsulated part according to claim 3, wherein, Before driving the first mold to move away from the second mold, the method further comprises the following steps: When the magnetic member is configured as a magnet, driving the first mold and the second mold to move away from the mounting plate.

5. The manufacturing process of a magnet encapsulated part according to claim 2, wherein, Driving the magnet to be encapsulated to move close to or away from the magnetic member by using the magnetic member arranged on the injection mold, so that the magnet to be encapsulated is located at a preset position in the injection cavity, wherein the magnet to be encapsulated is oppositely arranged with the magnetic member; When the magnetic pole close to the mounting plate of the magnet to be encapsulated repels the magnetic pole of the magnetic member, driving the magnet to be encapsulated to move away from the magnetic member to the preset position by using the magnetic member; When the magnetic pole close to the mounting plate of the magnet to be encapsulated attracts the magnetic pole of the magnetic member, driving the magnet to be encapsulated to move close to the magnetic member to the preset position by using the magnetic member; Detect whether the magnet to be encapsulated is located at a preset position.

6. The manufacturing process of a magnet encapsulated part according to claim 5, wherein, The detection of whether the magnet to be encapsulated is located at a preset position comprises: detecting the position of the magnet to be encapsulated based on the position detection member, and then determining whether the magnet to be encapsulated is opposite to the position detection member; if the magnet to be encapsulated is opposite to the position detection member, stopping driving the magnet to be encapsulated to move; if the magnet to be encapsulated is not opposite to the position detection member, determining whether the magnet to be encapsulated passes through the position detection member; if the magnet to be encapsulated passes through the position detection member, reducing the driving force of the magnetic member on the magnet to be encapsulated to make the magnet to be encapsulated move close to the position detection member; if the magnet to be encapsulated does not pass through the position detection member, increasing the driving force of the magnetic member on the magnet to be encapsulated to make the magnet to be encapsulated move close to the position detection member.

7. The manufacturing process of a magnet encapsulated part according to claim 6, wherein, The determination of whether the magnet to be encapsulated passes through the position detection member comprises: detecting the triggering state of the position detection member, and determining whether the position detection member is triggered according to the triggering state; if the position detection member is triggered, it is determined that the magnet to be encapsulated passes through the position detection member; if the position detection member is not triggered, it is determined that the magnet to be encapsulated does not pass through the position detection member.

8. The manufacturing process of a magnet encapsulated part according to claim 2, wherein, Before driving the magnet to be encapsulated to move close to or away from the magnetic member provided in the injection mold, the method further comprises: when the magnetic member is configured as a magnet, driving the first mold and the second mold to move close to the mounting plate.

9. The manufacturing process of a magnet encapsulated part according to claim 8, wherein, The magnetic member is protrudingly arranged towards the second mold, the second mold is provided with a receiving hole close to the end wall of the mounting plate, the magnetic member is opposite to the receiving hole, and the magnetic member is adapted to extend into or move out of the receiving hole.

10. The manufacturing process of a magnet encapsulated part according to claim 2, wherein, Both the magnet to be encapsulated and the magnetic member are multiple, and the multiple magnet to be encapsulated and the multiple magnetic member are sequentially arranged in the radial direction of the injection mold with a spacing, and the multiple magnet to be encapsulated and the multiple magnetic member are one-to-one corresponding.

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