Safety electric mutual inductor injection mold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a safety electricity mutual inductor injection mold which comprises an upper mold assembly, a lower mold assembly, an ejection assembly and a transverse movement forming assembly, and the upper mold assembly, the lower mold assembly and the transverse movement forming assembly are buckled to form a forming cavity of a mutual inductor shell. The transverse movement forming assembly comprises a telescopic cylinder installed on the lower die assembly, a return block, a first inclined block and a second inclined block, the first inclined block and the second inclined block are arranged on the return block, a first driving block is arranged on the upper die assembly, the first driving block and the first inclined block are matched to form a first inclined wedge mechanism, and the first inclined block and the second inclined block are matched to form a second inclined wedge mechanism. The return block, the first inclined block, the second inclined block and the male die are matched to form a first special-shaped side wall, the forced reset unit drives the first inclined block to automatically reset on the return block, and the die can enable the mutual inductor shell to be smoothly demolded.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to an injection mold for a safety electricity use mutual inductor. Background Art

[0002] The outer shell of the mutual inductor is a plastic part, and injection molds are generally used for processing in industrial production. After injection molding, the existing demolding method is to set ejector rods along the side wall or ejector rod of the mutual inductor outer shell to eject the mutual inductor outer shell from the convex mold to achieve demolding. At present, a safety electricity use mutual inductor appears. The side wall of the mutual inductor outer shell includes a first special-shaped side wall and a second special-shaped side wall. Concave and convex structures perpendicular to the side wall are respectively arranged on the first special-shaped side wall and the second special-shaped side wall. Moreover, a U-shaped groove with an opening direction parallel to and horizontally arranged with the side wall is arranged on the protruding structure of the first special-shaped side wall, and there is a protruding structure below the U-shaped groove, which makes the demolding of the mutual inductor outer shell difficult; on the other hand, the internal structure of the mutual inductor outer shell is relatively complex. When injecting with the traditional single gate feeding method, it is easy to cause deformation of the mutual inductor outer shell, and the quality of the finished product is difficult to guarantee. Content of the Utility Model

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides an injection mold for a safety electricity use mutual inductor, which can adapt to the complex structure of the mutual inductor outer shell and enable the mutual inductor outer shell to be smoothly demolded.

[0004] The specific technical solution adopted by the utility model is as follows:

[0005] An injection mold for a safety electricity use mutual inductor includes an upper mold assembly, a lower mold assembly which are connected in a guiding manner, and an ejecting assembly and a transverse movement forming assembly arranged on the lower mold assembly. The upper mold assembly, the lower mold assembly and the transverse movement forming assembly are buckled to form a forming cavity for the mutual inductor outer shell. The injection port is located on the upper mold assembly. The key lies in that the transverse movement forming assembly includes a telescopic cylinder installed on the lower mold assembly, a retracting block connected to the telescopic cylinder, and a first inclined block and a second inclined block arranged on the retracting block. A first driving block matching with the first inclined block is arranged on the upper mold assembly. Guide grooves of the first inclined block and the second inclined block and a forced reset unit of the first inclined block are respectively arranged on the retracting block. The first driving block and the first inclined block are matched to form a first inclined wedge mechanism. The second inclined block and the first inclined block are matched to form a second inclined wedge mechanism. The first inclined block drives the second inclined block to move along the Y-axis on the retracting block by means of a linkage component. The telescopic cylinder drives the retracting block to move along the X-axis towards the mutual inductor outer shell. The retracting block, the first inclined block, the second inclined block and the lower mold assembly cooperate to form the first special-shaped side wall.

[0006] The linkage assembly includes a guiding block provided on the second inclined block and a guiding and driving groove provided on the first inclined block and mating with the guiding block. The guiding and driving groove clamps the guiding block, and the guiding block has the freedom to move along the guiding and driving groove.

[0007] The forced reset unit includes an inclined guide rod provided on the upper die assembly and an inclined guiding hole provided on the first inclined block and mating with the inclined guide rod.

[0008] The transverse forming assembly further includes a concave-convex forming block. A second driving block is provided on the upper die assembly. The second driving block and the concave-convex forming block cooperate to form a third inclined wedge mechanism. A reset spring mating with the concave-convex forming block is provided on the lower die assembly. The concave-convex forming block and the lower die assembly cooperate to form a second special-shaped side wall.

[0009] A limiting block mating with the concave-convex forming block is provided on the lower die assembly.

[0010] An upper pressing plate mating with the first inclined block and an ejector pin located below the first inclined block are provided on the retracting block. A positioning hole mating with the ejector pin is provided at the bottom of the retracting block.

[0011] The ejecting assembly includes a top plate located below the lower die assembly, a lower cylinder and a return spring respectively provided on the top plate. The upper die assembly includes an upper die base and an upper forming cylinder provided on the upper die base for forming a through hole on the current transformer housing. The upper end of the return spring is connected to the lower die assembly. The lower cylinder contacts the bottom of the through hole on the current transformer housing and contacts the end face of the upper forming cylinder.

[0012] Four glue inlets are provided on the upper die assembly and are respectively located above the forming cavity of the current transformer housing. The glue inlets are communicated with the injection port.

[0013] The beneficial effects of the present utility model are:

[0014] In the present utility model, the telescopic cylinder is used to drive the retracting block to advance to a preset position to form the concave-convex structure on the first special-shaped side wall. The first driving block is used to drive the first inclined block to advance. At the same time, the first inclined block drives the second inclined block to horizontally move along the direction parallel to the first special-shaped side wall to form a protrusion with a horizontal U-shaped groove thereon. The direction in which the protrusion protrudes from the current transformer housing is perpendicular to the opening direction of the U-shaped groove. The second inclined block can be separated from the protrusion. Finally, the telescopic cylinder drives the retracting block, the first inclined block and the second inclined block to retract, so that the ejecting assembly jacks up the current transformer housing along the Z axis. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is the top view of the present utility model;

[0017] Figure 3 is Figure 2 the sectional view taken along the A-A direction in

[0018] Figure 4 is Figure 2 the sectional view taken along the B-B direction in

[0019] Figure 5 is Figure 1 the structural schematic diagram after removing the upper die assembly in

[0020] Figure 6 is Figure 1 the structural schematic diagram after removing the lower die assembly in

[0021] Figure 7 is the assembly schematic diagram of the first inclined block, the second inclined block and the transformer housing in the mold-closed state;

[0022] Figure 8 is Figure 6 the sectional view taken along the C-C direction in

[0023] Figure 9 is the assembly schematic diagram of the first inclined block, the second inclined block and the transformer housing after the first inclined block is reset on the retraction block;

[0024] Figure 10 is the assembly schematic diagram of the first inclined block, the second inclined block and the transformer housing after the retraction block is reset;

[0025] Figure 11 is the structural schematic diagram of the transformer housing;

[0026] In the attached drawings, 1. upper die base, 2. female die, 3. male die, 4. lower die base, 5. top plate, 6. transformer housing, 61. first special-shaped side wall, 62. second special-shaped side wall, 63. through hole, 7. telescopic cylinder, 8. retraction block, 9. first inclined block, 10. second inclined block, 11. upper forming cylinder, 12. return spring, 13. guide block, 14. guide sliding drive groove, 15. first drive block, 16. upper pressure plate, 17. ejector pin, 18. concave-convex forming block, 19. second drive block, 20. reset spring, 21. limit block, 22. inclined guide rod, 23. inclined guide hole, 24. lower cylinder, 25. glue inlet. Specific embodiments

[0027] The present utility model will be further described below in conjunction with the attached drawings and specific embodiments:

[0028] The specific embodiment is as follows Figure 1-11As shown in the figure, a safety electricity - using current transformer injection mold includes an upper mold assembly and a lower mold assembly that are guidingly connected, as well as an ejection assembly and a transverse movement forming assembly arranged on the lower mold assembly. The upper mold assembly includes an upper mold base 1 and a female mold 2 installed on the upper mold base 1. The lower mold assembly includes a lower mold base 4 and a male mold 3 installed on the lower mold base 4. The female mold 2, the male mold 3 and the transverse movement forming assembly are buckled to form a molding cavity for the current transformer housing 6. The transverse movement forming assembly includes a telescopic cylinder 7 installed on the lower mold base 4, a retraction block 8 connected to the telescopic cylinder 7, and a first inclined block 9 and a second inclined block 10 arranged on the retraction block 8. A first driving block 15 matching the first inclined block 9 is arranged on the upper mold base 1. Guide grooves for the first inclined block 9 and the second inclined block 10 and a forced reset unit for the first inclined block 9 are respectively arranged on the retraction block 8. The first driving block 15 and the first inclined block 9 are matched to form a first inclined wedge mechanism, and the second inclined block 10 and the first inclined block 9 are matched to form a second inclined wedge mechanism. The first inclined block 9 drives the second inclined block 10 to move along the Y - axis on the retraction block 8 by means of a linkage component. The telescopic cylinder 7 drives the retraction block 8 to move along the X - axis towards the current transformer housing 6. The retraction block 8, the first inclined block 9, the second inclined block 10 and the male mold 3 cooperate to form a first special - shaped side wall 61.

[0029] The first special - shaped side wall 61 is arranged along the Y - axis, the concave - convex structure on the first special - shaped side wall 61 is arranged along the X - axis, and there is a U - shaped groove with an opening direction along the Y - axis on one of the protruding structures.

[0030] By extending the telescopic cylinder 7, the retraction block 8 is pushed to move along the X - axis close to the male mold 3. After reaching the preset position, the upper mold base 1 descends relative to the lower mold assembly. The inclined surface of the first driving block 15 installed on the upper mold base 1 contacts the inclined surface of the first inclined block 9. The upper mold base 1 continues to descend, and the first driving block 15 drives the first inclined block 9 to move along the X - axis towards the male mold 3. At the same time, the first inclined block 9 forms a drive for the second inclined block 10 by means of a linkage component, so that the second inclined block 10 moves along the Y - axis. The injection port is located on the upper mold base 1. After the injection is completed, the upper mold base 1 rises relative to the lower mold assembly. Driven by the forced reset unit, the first inclined block 9 is reset on the retraction block 8. Driven by the first inclined block 9, the second inclined block 10 moves along the Y - axis for resetting and disengages from the U - shaped groove on the protrusion of the first special - shaped side wall 61. Subsequently, the telescopic cylinder 7 contracts, driving the retraction block 8, the first inclined block 9 and the second inclined block 10 to move backward along the X - axis and disengage from the current transformer housing 6. Finally, the ejection assembly jacks up the current transformer housing 6 from the male mold 3 to complete the production of a current transformer housing 6. There is an inclined surface on the retraction block 9 that matches the first driving block 15. When the inclined surfaces between the first driving block 15 and the retraction block 9 are in contact, the first driving block 15 can no longer continue to press down, and the retraction block 9 forms a limit for the first driving block 15.

[0031] The utility model uses a telescopic cylinder 7 to drive a retraction block 8 to approach a punch 3 to form a concavo-convex structure perpendicular to the side wall of the transformer housing 6 on the first special-shaped side wall 61; by means of a first driving block 15, a first inclined block 9 is driven to approach the punch 3, and at the same time, the first inclined block 9 drives a second inclined block 10 to horizontally move along a direction parallel to the first special-shaped side wall 61 to form a protrusion with a U-shaped groove thereon. The protruding direction of the protrusion from the transformer housing 6 is perpendicular to the opening direction of the U-shaped groove and is horizontally arranged. The second inclined block 10 can be separated from the protrusion. Finally, the telescopic cylinder 7 drives the retraction block 8, the first inclined block 9, and the second inclined block 10 to retract away from the transformer housing 6, so that the ejection assembly jacks up the transformer housing 6 along the Z axis.

[0032] The linkage assembly includes a guiding block 13 arranged on the second inclined block 10 and a guiding and driving groove 14 arranged on the first inclined block 9 and matching with the guiding block 13. The guiding and driving groove 14 clamps the guiding block 13 and the guiding block 13 has a degree of freedom to move along the guiding and driving groove 14. Since the guiding and driving groove 14 clamps the guiding block 13, when the first inclined block 9 advances or retracts on the retraction block 8, a driving force will be generated on the second inclined block 10. The guiding block 13 is a trapezoidal block.

[0033] The forced reset unit includes an inclined guide rod 22 arranged on the upper die base 1 and an inclined guiding hole 23 arranged on the first inclined block 9 and matching with the inclined guide rod 22. During the descending process of the upper die base 1, the inclined guide rod 22 first enters the inclined guiding hole 23. The upper end of the inclined guiding hole 23 is provided with a rounded corner, and the lower end of the inclined guide rod 22 is a hemispherical structure, so that the inclined guide rod 22 can smoothly enter the inclined guiding hole 23 to ensure that the first driving block 15 can contact the first inclined block 9 when the upper die base 1 continues to descend relative to the lower die assembly. When the upper die base 1 rises, under the push of the inclined guide rod 22, the first inclined block 9 retracts and resets.

[0034] The transverse movement forming assembly further includes a concavo-convex forming block 18. A second driving block 19 is arranged on the upper die base 1. The second driving block 19 and the concavo-convex forming block 18 cooperate to form a third inclined wedge mechanism. A reset spring 20 matching with the concavo-convex forming block 18 is arranged on the lower die assembly. The concavo-convex forming block 18 and the lower die assembly are matched to form a second special-shaped side wall 62. The two ends of the reset spring 20 are respectively fixedly connected to the front end of the concavo-convex forming block 18 and the lower die base 4. When the upper die base 1 descends, the second driving block 19 contacts the concavo-convex forming block 18 and drives the concavo-convex forming block 18 to approach the punch 3, and the reset spring 20 is compressed. The concavo-convex forming block 18 and the punch 3 are matched to form a second special-shaped side wall 62 with a concavo-convex structure; when the upper die base 1 rises, the reset spring 20 elongates to push the concavo-convex forming block 18 to retract until it is separated from the second special-shaped side wall 62. The concavo-convex forming block 18 and the lower die base 4 are in guiding cooperation, and a pressing plate for the concavo-convex forming block 18 is arranged on the lower die base 4. The pressing plate forms a limit for the concavo-convex forming block 18 in the Z axis direction to prevent the concavo-convex forming block 18 from falling off the lower die base 4.

[0035] A limit block 21 matching the concave-convex forming block 18 is arranged on the lower die base 4. The limit block 21 is located at the rear side of the concave-convex forming block 18 to limit the retraction position of the concave-convex forming block 18.

[0036] An upper pressure plate 16 matching the first inclined block 9 and an ejector pin 17 located below the first inclined block 9 are arranged on the retraction block 8. A positioning hole matching the ejector pin 17 is arranged at the bottom of the retraction block 8. When the inclined guide rod 22 is separated from the first inclined block 9, the end of the ejector pin 17 pops up and extends into the positioning hole on the first inclined block 9 to prevent the first inclined block 9 from continuing to move along its guide groove, facilitating the smooth insertion of the inclined guide rod 22 into the inclined guide hole 23 on the first inclined block 9 during the next injection molding and clamping.

[0037] The ejection assembly includes a top plate 5 located below the lower die assembly, a lower cylinder 24 and a return spring 12 respectively arranged on the top plate 5. The upper die assembly further includes an upper forming cylinder 11 arranged on the upper die base 1. The upper forming cylinder 11 is matched with the convex die 3 to form a through hole 63 on the transformer housing 6. The upper end of the return spring 12 is connected to the lower die base 4. The lower cylinder 24 contacts the bottom of the through hole 63 on the transformer housing 6 and contacts the end face of the upper forming cylinder 11. A top drive rod is further arranged below the lower die base 4, and the top drive rod is connected to the top plate 5; the top plate 5 is guided by a guide post between the lower die base 4, and the return spring 12 is sleeved on the guide post; after the injection molding is completed and the upper die base 1 rises and the telescopic cylinder 7 resets, the transformer housing 6 is no longer under the pressure in the Z-axis direction. Subsequently, the top plate 5 rises along the lower die base 4 under the action of the top drive rod, and the lower cylinder 24 and the ejector rod act together on the transformer housing 6 to eject the transformer housing 6 from the convex die 3 to complete demolding. Subsequently, the top drive rod resets, and the return spring 12 rebounds the top plate 5 to drive the ejector rod and the lower cylinder 24 to reset.

[0038] Further, four glue inlets 25 are arranged on the upper die assembly above the forming cavity of the transformer housing 6 respectively. The glue inlets 25 are communicated with the injection port. The glue inlets 25 are all thin gates, and the molten plastic is evenly injected into the forming cavity from the four glue inlets 25, effectively reducing the deformation of the transformer housing and improving the product quality of the transformer housing.

Claims

1. A safety electricity - using current transformer injection mold, comprising an upper mold assembly and a lower mold assembly that are directionally connected, as well as an ejection assembly and a transverse movement forming assembly arranged on the lower mold assembly. The upper mold assembly, the lower mold assembly and the transverse movement forming assembly are buckled to form a molding cavity for the current transformer housing (6), and the injection port is located on the upper mold assembly. It is characterized in that: The transverse forming assembly described above includes a telescopic cylinder (7) installed on the lower die assembly, a retracting block (8) connected to the telescopic cylinder (7), and a first inclined block (9) and a second inclined block (10) provided on the retracting block (8). A first driving block (15) matching the first inclined block (9) is provided on the upper die assembly. Guide grooves for the first inclined block (9) and the second inclined block (10) and a forced reset unit for the first inclined block (9) are respectively provided on the retracting block (8). The first driving block (15) and the first inclined block (9) cooperate to form a first inclined wedge mechanism, and the second inclined block (10) and the first inclined block (9) cooperate to form a second inclined wedge mechanism. The first inclined block (9) drives the second inclined block (10) to move along the Y-axis on the retracting block (8) by means of a linkage assembly. The telescopic cylinder (7) drives the retracting block (8) to move along the X-axis towards the transformer housing (6). The retracting block (8), the first inclined block (9), the second inclined block (10) cooperate with the lower die assembly to form a first special-shaped side wall (61).

2. The injection mold for a safety electricity - using current transformer according to claim 1, characterized in that: The linkage assembly described above includes a guide block (13) provided on the second inclined block (10) and a guide sliding drive groove (14) provided on the first inclined block (9) and matching the guide block (13). The guide sliding drive groove (14) clamps the guide block (13) and the guide block (13) has the freedom to move along the guide sliding drive groove (14).

3. A safety power consumption current transformer injection mold according to claim 1, characterized in that: The forced reset unit described above includes an inclined guide rod (22) provided on the upper die assembly and an inclined guide hole (23) provided on the first inclined block (9) and matching the inclined guide rod (22).

4. A safety power - using current transformer injection mold according to claim 1, characterized in that: The transverse forming assembly also includes a concave-convex forming block (18). A second driving block (19) is provided on the upper die assembly. The second driving block (19) and the concave-convex forming block (18) cooperate to form a third inclined wedge mechanism. A return spring (20) matching the concave-convex forming block (18) is provided on the lower die assembly. The concave-convex forming block (18) and the lower die assembly cooperate to form a second special-shaped side wall (62).

5. A safety power consumption current transformer injection mold according to claim 1, characterized in that: A limit block (21) matching the concave-convex forming block (18) is provided on the lower die assembly.

6. The injection mold for a safe power - using current transformer according to claim 1, characterized in that: An upper pressure plate (16) matching the first inclined block (9) and an ejector pin (17) located below the first inclined block (9) are provided on the retracting block (8). A positioning hole matching the ejector pin (17) is provided at the bottom of the retracting block (8).

7. The injection mold for a safe power - using current transformer according to claim 1, characterized in that: The ejecting assembly includes a top plate (5) located below the lower die assembly, a lower cylinder (24) and a return spring (12) respectively provided on the top plate (5). The upper die assembly includes an upper die base (1) and an upper forming cylinder (11) provided on the upper die base (1) for forming a through hole (63) on the transformer housing (6). The upper end of the return spring (12) is connected to the lower die assembly. The lower cylinder (24) contacts the bottom of the through hole (63) on the transformer housing (6) and contacts the end face of the upper forming cylinder (11).

8. A safety electricity - using current transformer injection mold according to claim 1, characterized in that: There are four glue inlets (25) on the upper mold assembly, which are respectively located above the molding cavity of the mutual inductor housing (6), and the glue inlets (25) are communicated with the injection ports.

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