Magnet insert injection molding tool and injection molding method

Abstract

The magnet insert injection molding tool comprises an injection mold, a magnet jig and a mechanical arm, the injection mold comprises sliding block assemblies, the sliding block assemblies are arranged on the two sides of an injection mold cavity of the injection mold, an embedding groove is formed in the end of the magnet jig, a magnet is arranged in the embedding groove, and the mechanical arm is arranged in the embedding groove. The magnet jig can be connected with the mechanical arm in a sliding mode, the magnet jig can be transferred and installed on the sliding block assembly in an embedded mode through the mechanical arm, and the magnet is located in the injection mold cavity. The magnet jig is introduced, the magnet is placed on the magnet jig, then the magnet jig is placed on the sliding block assembly, the magnet does not make direct contact with the sliding block, burrs caused by long-time contact between the sliding block and the magnet are avoided, the magnet jig is transferred and installed through the mechanical arm, and the automation degree is high, and the precision is high.

Description

Technical Field

[0001] The invention belongs to the technical field of metal insert injection molding, and in particular relates to a magnet insert injection molding tool and an injection molding method. Background Art

[0002] Metal insert molding (outserr moulding) is a method of insert modeling in which the metal insert is pre-fixed in the appropriate position in the mold, and then injected with plastic to form the mold. After the mold is opened, the insert is tightly wrapped by the cooled and solidified plastic and buried in the product to obtain a product with inserts such as threaded rings and electrodes.

[0003] At present, in order to improve the degree of automation in production, industrial robotic arms are developed and used to grab magnet jigs, and the industrial robotic arms are used to place the magnet jigs on the mold with high precision. However, how to ensure that the robotic arm jig does not fall when clamping the magnet jig, and how to ensure that the magnet jig does not move with the robotic arm when the robotic arm withdraws after placing the magnet jig has become a technical difficulty. In addition, due to the repeated placement of the magnet on the slider, burrs appear at the place where the slider and the magnet match after a long period of production, which greatly increases the defective rate of the product. Since magnets and iron are prone to magnetic attraction, when the magnet is placed on the slider, since the surrounding area is made of iron, it is very easy to cause the magnet poles to flip, resulting in the molded product being unusable after assembly.

[0004] Therefore, the above problems have become technical problems that need to be solved urgently. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the present invention provides a magnet insert injection molding tool and an injection molding method, which has a simple structure, is easy to use, and is more suitable for modern automatic production.

[0006] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a magnet insert injection molding tool, including an injection mold, a magnet jig and a manipulator, the injection mold includes a slider assembly, the slider assembly is arranged on both sides of the injection mold cavity of the injection mold, the end of the magnet jig is provided with an embedding groove, the embedding groove is equipped with a magnet, the magnet jig can be slidably connected with the manipulator, the magnet jig can be transferred and embedded on the slider assembly by the manipulator, and the magnet is located in the injection mold cavity. The present invention introduces a magnet jig, places the magnet on the magnet jig, and then places the magnet jig on the slider assembly. The magnet does not directly contact the slider, which avoids the slider and the magnet from contacting for a long time to produce burrs, and the magnet jig is transferred and installed by the manipulator with high automation and high precision.

[0007] Furthermore, the magnet jig is a beryllium copper block, an inverted trapezoidal slider is provided on the upper part of the magnet jig, embedded ears are provided on both sides of the magnet jig, an iron insert for adsorbing the magnet is provided in the middle of the magnet jig, and screws are embedded in the bottom of the magnet jig. The magnet jig is made of beryllium copper, which will not react with the magnet to cause the magnet to flip, and beryllium copper also has the characteristic of rapid cooling, which can reduce the molding cycle and improve work efficiency.

[0008] Furthermore, the injection mold includes an upper mold and a lower mold, the upper mold is provided with a group of guide pillars and a shovel base, the guide pillars are inclined columns, and the shovel base is provided with a downward pressing inclined surface.

[0009] Furthermore, the slider assembly includes a slider body and a material receiving block, wherein the slider body is slidably arranged on the lower mold, the material receiving block is arranged on the slider body, a rectangular inclined hole is arranged on the slider body, the rectangular inclined hole cooperates with a guide column, and the end of the slider body is an inclined surface, which can cooperate with the downward pressing inclined surface of the shovel base. When the upper mold is pressed downward, the shovel base contacts the slider body to make the slider body move closer to the injection mold cavity, and when the upper mold moves upward, the guide column and the rectangular inclined hole act to make the slider body move in the opposite direction away from the injection mold cavity.

[0010] Furthermore, the material receiving block is provided with a material receiving groove of the same shape as the magnet fixture, and a magnetic block is provided at the bottom of the material receiving groove, and the magnetic block can adsorb the screws at the bottom of the magnet fixture. A positioning block is also provided on the lower mold, and a limiting protrusion is provided on the upper part of the positioning block, and a spring is provided on the lower part. A group of mutually parallel positioning grooves are opened on the bottom surface of the slider body, and the positioning grooves can cooperate with the positioning block for positioning. The embedded ears on both sides of the magnet fixture cooperate with the material receiving groove, so that the manipulator will not drive the magnet fixture when retreating; the magnetic block at the bottom of the material receiving groove is adsorbed with the screws on the magnet fixture, so that the magnet can directly adsorb the screws and indirectly adsorb the magnet fixture on the slider body without falling, preventing the magnet fixture from shaking during mold closing and causing the mold to be unable to be closed; a group of positioning grooves opened on the bottom surface of the slider body correspond to the locking positions during mold opening and mold closing, and the inclined surface of the positioning groove applies horizontal force on the inclined surface of the limiting protrusion during mold opening or mold closing, and the vertical downward component compresses the spring under the positioning block, and the positioning block moves downward, and the slider body slides smoothly until the other positioning groove reaches the top of the limiting protrusion, and the positioning block moves up under the action of the spring and clamps the slider body.

[0011] Furthermore, there are at least two injection cavities in the injection mold and the injection cavities are symmetrically arranged. A through hole is arranged on the side of the injection cavity, and the magnet can enter the injection cavity through the through hole.

[0012] Furthermore, a trapezoidal slide groove is provided at the bottom of the manipulator, and the trapezoidal slide groove cooperates with a slider. The trapezoidal slide groove cooperates with an inverted trapezoidal slider to prevent the magnet fixture from being separated from the manipulator during movement.

[0013] Furthermore, the cross-sectional length of the rectangular inclined hole on the body is greater than the cross-sectional length of the guide post. This design ensures that the slider body has a certain sliding distance.

[0014] A method for injection molding a magnet insert comprises the following steps: S1, manually placing the magnet in the slot on the magnet fixture, the magnet adsorbs to the iron insert in the magnet fixture and is firmly adsorbed on the magnet fixture; S2, the manipulator is connected with the slider on the upper part of the magnet fixture through the trapezoidal slide groove at the bottom, and then the manipulator moves with the magnet fixture and puts it into the receiving groove of the receiving block, and the manipulator moves in the opposite direction to separate from the magnet fixture; S3, start to close the mold, the upper mold moves downward, and the shovel base on the upper mold presses down on the inclined surface at the end of the slider body to make the slider body move closer to the injection mold cavity until the magnet enters the injection mold cavity through the through hole on the side of the injection mold cavity; S4; mold closing is completed and injection molding begins; S5, after the injection molding is completed, the upper mold moves upward when the mold is opened, and the guide pin cooperates with the rectangular inclined hole to make the slider body move in the opposite direction, thereby driving the magnet fixture to separate and take out the magnet insert.

[0015] It can be seen from the above technical solution that the present invention has the following beneficial effects: 1. The present invention provides a magnet insert injection molding tool and an injection molding method, which has a simple structure, is easy to use, and is more suitable for modern automatic production. A magnet jig is introduced, a magnet is placed on the magnet jig, and then the magnet jig is placed on a slider assembly. The magnet does not directly contact the slider, thereby avoiding burrs caused by long-term contact between the slider and the magnet. In addition, the magnet jig is transferred and installed by a manipulator, which has a high degree of automation and high precision.

[0016] 2. The magnet jig in the present invention is made of beryllium copper, which will not react with the magnet by magnetic attraction, effectively preventing the magnet's poles from flipping. At the same time, iron inserts are embedded in the magnet jig to ensure that the magnet is firmly adsorbed on the magnet jig and does not fall off. A magnetic block is provided on the material connection block, and an iron screw is provided in the magnet jig. The magnetic block and the screw are adsorbed so that the magnet jig is adsorbed on the material connection block and does not fall off.

[0017] 3. The use of a manipulator to transport and install the magnet fixture is convenient, fast and more accurate. At the same time, the trapezoidal slide and the inverted trapezoidal slider on the manipulator cooperate to ensure that the magnet fixture will not separate from the manipulator during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the magnet fixture of the present invention. Figure 2 is a cross-sectional schematic diagram of the magnet fixture of the present invention; Figure 3 It is a structural schematic diagram of the slider assembly of the present invention; Figure 4 It is a structural schematic diagram of the manipulator of the present invention; Figure 5 It is a structural schematic diagram of the injection mold of the present invention; Figure 6 It is a schematic diagram of the injection mold closing state; Figure 7 This is a schematic diagram of the injection mold opening state.

[0019] In the figure: 1-injection mold, 11-slider assembly, 111-slider body, 112-material receiving block, 12-upper mold, 121-guide column, 122-shovel base, 13-lower mold, 131-positioning block, 2-magnet fixture, 21-slider, 22-embedded ear, 23-iron insert, 24-screw, 25-magnet, 3-manipulator, 31-trapezoidal slide. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0021] Embodiment 1: like Figure 1-5 As shown, a magnet 25 insert injection molding tooling includes an injection mold 1, a magnet 25 fixture 2 and a manipulator 3. The injection mold 1 includes a slider assembly 11. The slider assembly 11 is arranged on both sides of the injection mold cavity of the injection mold 1. An embedding groove is arranged at the end of the magnet 25 fixture 2, and the magnet 25 is installed in the embedding groove. The magnet fixture 2 can be slidably connected to the manipulator 3. The magnet fixture 2 can be transferred and embedded in the slider assembly 11 through the manipulator 3, and the magnet 25 is located in the injection mold cavity.

[0022] like Figure 1 , Figure 2 As shown, the magnet jig 2 is a beryllium copper block, an inverted trapezoidal slider 21 is provided on the upper part of the magnet jig 2, embedded ears 22 are provided on both sides of the magnet jig 2, an iron insert 23 for adsorbing a magnet 25 is provided in the middle of the magnet jig 2, and a screw 24 is embedded in the bottom of the magnet jig 2.

[0023] Further optimization solutions, such as Figure 5 As shown, the injection mold 1 includes an upper mold 12 and a lower mold 13 , and the upper mold 12 is provided with a group of guide pillars 121 and a shovel base 122 , the guide pillars 121 are inclined columns, and the shovel base 122 is provided with a downward pressing inclined surface.

[0024] Specifically, the slider assembly 11 includes a slider body 111 and a material receiving block 112. The slider body 111 is slidably arranged on the lower mold 13, and the material receiving block 112 is arranged on the slider body 111. A rectangular inclined hole is arranged on the slider body 111, and the rectangular inclined hole cooperates with the guide column 121. The end of the slider body 111 is an inclined surface, which can cooperate with the downward pressing inclined surface of the shovel base 122.

[0025] The receiving block 112 is provided with a receiving groove of the same shape as the magnet fixture 2, and a magnetic block is provided at the bottom of the receiving groove, and the magnetic block can adsorb the screw 24 at the bottom of the magnet fixture 2. A positioning block 131 is also provided on the lower mold 13, and a limiting protrusion is provided on the upper part of the positioning block 131, and a spring is provided on the lower part. A group of mutually parallel positioning grooves are opened on the bottom surface of the slider body 111, and the positioning grooves can cooperate with the positioning block 131 for positioning.

[0026] There are at least two injection cavities in the injection mold 1 and the injection cavities are symmetrically arranged. A through hole is arranged on the side of the injection cavity, and the magnet 25 can enter the injection cavity through the through hole.

[0027] like Figure 4 As shown, a trapezoidal slide groove 31 is provided at the bottom of the manipulator 3 , and the trapezoidal slide groove 31 cooperates with the slider 21 .

[0028] In this embodiment, the cross-sectional length of the rectangular inclined hole on the body 111 is greater than the cross-sectional length of the guide pillar 121 .

[0029] In this embodiment, an injection molding method using a magnet 25 insert injection molding tool is as follows: S1, manually placing the magnet 25 in the embedding groove on the magnet fixture 2, the magnet 25 is adsorbed to the iron insert 23 in the magnet fixture 2 and thus firmly adsorbed on the magnet fixture 2; S2, the manipulator 3 is connected with the slider 21 on the upper part of the magnet fixture 2 through the trapezoidal slide groove 31 at the lower part thereof, and then the manipulator 3 moves with the magnet fixture 2 and puts it into the receiving groove of the receiving block 112, and the manipulator 3 moves in the opposite direction to separate from the magnet fixture 2; S3, such as Figure 6 As shown, the mold is closed, the upper mold 12 moves downward, and the shovel base 122 on the upper mold 12 presses down on the inclined surface at the end of the slider body 111 to make the slider body 111 move closer to the injection mold cavity until the magnet enters the injection mold cavity through the through hole on the side of the injection mold cavity; S4; mold closing is completed and injection molding begins; S5, such as Figure 7 As shown, after the injection molding is completed, the upper mold 12 moves upward when the mold is opened, and the guide pillar 121 cooperates with the rectangular inclined hole to make the slider body 111 move in the opposite direction, thereby driving the magnet fixture 2 to separate and take out the magnet 25 insert.

[0030] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A magnet (25) insert injection molding tool, characterized in that: The invention comprises an injection mold (1), a magnet jig (2) and a manipulator (3), wherein the injection mold (1) comprises a slider assembly (11), wherein the slider assembly (11) is arranged on both sides of an injection mold cavity of the injection mold (1), an embedding groove is arranged at the end of the magnet jig (2), and a magnet (25) is installed in the embedding groove, wherein the magnet jig (2) can be slidably connected to the manipulator (3), and the magnet jig (2) can be transferred and embedded in the slider assembly (11) by the manipulator (3), and the magnet (25) is located in the injection mold cavity.

2. A magnet (25) insert injection molding tool according to claim 1, characterized in that: The magnet jig (2) is a beryllium copper block, an inverted trapezoidal slider (21) is provided on the upper portion of the magnet jig (2), embedded ears (22) are provided on both sides of the magnet jig (2), an iron insert (23) for adsorbing a magnet (25) is provided in the middle of the magnet jig (2), and a screw (24) is embedded in the bottom of the magnet jig (2).

3. A magnet (25) insert injection molding tool according to claim 2, characterized in that: The injection mold (1) comprises an upper mold (12) and a lower mold (13); a group of guide pillars (121) and a shovel base (122) are provided on the upper mold (12); the guide pillars (121) are inclined columns; and a downward pressing inclined surface is provided on the shovel base (122).

4. A magnet (25) insert injection molding tool according to claim 3, characterized in that: The slider assembly (11) comprises a slider body (111) and a material receiving block (112); the slider body (111) is slidably arranged on the lower mold (13); the material receiving block (112) is arranged on the slider body (111); a rectangular inclined hole is arranged on the slider body (111); the rectangular inclined hole cooperates with the guide column (121); the end of the slider body (111) is an inclined surface, and the inclined surface can cooperate with the downward pressing inclined surface of the shovel base (122).

5. A magnet (25) insert injection molding tool according to claim 6, characterized in that: The receiving block (112) is provided with a receiving groove of the same shape as the magnet fixture (2); a magnetic block is provided at the bottom of the receiving groove, and the magnetic block can adsorb the screw (24) at the bottom of the magnet fixture (2); a positioning block (131) is also provided on the lower mold (13); a limiting protrusion is provided on the upper part of the positioning block (131), and a spring is provided on the lower part; a group of mutually parallel positioning grooves are opened on the bottom surface of the slider body (111), and the positioning grooves can cooperate with the positioning block (131) for positioning.

6. A magnet (25) insert injection molding tool according to claim 5, characterized in that: There are at least two injection cavities in the injection mold (1), and the injection cavities are symmetrically arranged. A through hole is arranged on the side of the injection cavity, and the magnet (25) can enter the injection cavity through the through hole.

7. A magnet (25) insert injection molding tool according to claim 6, characterized in that: A trapezoidal slide groove (31) is provided at the bottom of the manipulator (3), and the trapezoidal slide groove (31) cooperates with the slider (21).

8. A magnet (25) insert injection molding tool according to claim 7, characterized in that: The cross-sectional length of the rectangular inclined hole on the body (111) is greater than the cross-sectional length of the guide column (121).

9. A method for injection molding a magnet (25) insert, implemented based on a magnet (25) insert injection molding tool as claimed in any one of claims 1 to 8, characterized in that: The steps include: S1, manually placing a magnet (25) in a slot on a magnet jig (2), so that the magnet (25) adsorbs to the iron insert (23) in the magnet jig (2) and is firmly adsorbed on the magnet jig (2); S2, the manipulator (3) is connected to the slider (21) on the upper part of the magnet fixture (2) by means of the trapezoidal slide groove (31) on the lower part thereof, and then the manipulator (3) moves with the magnet fixture (2) and places it into the receiving groove of the receiving block (112), and the manipulator (3) moves in the opposite direction to separate from the magnet fixture (2); S3, starting to close the mold, the upper mold (12) moves downward, and the shovel base (122) on the upper mold (12) presses down on the inclined surface at the end of the slider body (111) to make the slider body (111) move closer to the injection mold cavity until the magnet enters the injection mold cavity through the through hole on the side of the injection mold cavity; S4; mold closing is completed and injection molding begins; S5, after the injection molding is completed, the upper mold (12) moves upward when the mold is opened, and the guide pillar (121) cooperates with the rectangular inclined hole to make the slider body (111) move in the opposite direction, thereby driving the magnet fixture (2) to separate and remove the magnet (25) insert.

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