Insulator casting mold

Abstract

The utility model relates to an insulator casting mold, including a lower mold base and an upper mold base, a mold cavity is formed on both the lower mold base and the upper mold base, and an exhaust channel is formed at the outer edge of the umbrella skirt on the mold cavity. The casting hole is arranged on the top of the upper mold base. A plurality of exhaust hole portions are distributed alternately along the axial direction on the upper mold base. The exhaust hole portion includes a through hole formed on the upper mold base and extending in the vertical direction with the axis thereof, and the lower port of the through hole extends to the wave crest edge of the umbrella portion. By arranging the exhaust hole portion on the upper mold base, this patent can achieve good exhaust at the umbrella portion position at each location of the mold cavity during the entire casting process, and can greatly reduce the possibility of pores formed on the surface of the insulator after casting.

Description

Technical Field

[0001] The utility model relates to the technical field of insulator casting, in particular to an insulator casting mould. Background Art

[0002] Insulators are electrical components used to support and insulate live conductors and are widely used in power systems.

[0003] See also Figure 1 , Figure 2 The insulator molding mold is used to inject a sheath to protect the core rod and an umbrella skirt to increase the creepage distance outside the insulator core rod, including a lower mold base 10 and an upper mold base 20. The mold cavities 30 on the two mold bases are alternately distributed with umbrella parts 31 (or umbrella skirt parts) in the left and right directions. For example, the technical solution disclosed in the patent document with the patent number of 2018209294254 and the patent name of an exhaust structure for a composite insulator mold shows that an exhaust channel is formed at the edge of its cavity 4 (i.e., the mold cavity), and a radial exhaust channel 4 connected to the exhaust channel is formed at the outer edge of the exhaust channel and at the corresponding umbrella skirt part. Although the public patent document can improve the exhaust effect to a certain extent, there are still some shortcomings. Specifically, as the rubber is continuously injected into the cavity, the air in the cavity will be discharged to the outside through the passage formed by the exhaust channel and the radial exhaust channel. However, when the injected rubber fills the cavity on the lower mold base and gradually fills into the cavity of the upper mold base, the exhaust effect of the radial exhaust channel will gradually weaken or even be lost. At this time, the control in the cavity is mainly discharged outwardly through the pouring port on the upper mold base, and the axial end side far from the pouring port is prone to insufficient exhaust, which can easily form pores on the surface of the molded insulator. Utility Model Content

[0004] In order to improve the exhaust effect of the insulator casting mold and reduce the possibility of pores on the surface of the insulator after casting, the utility model provides an insulator casting mold, which can achieve good exhaust at the umbrella position of each part of the mold cavity during the entire casting process by arranging exhaust holes on the upper mold base, thereby greatly reducing the possibility of pores on the surface of the insulator after casting.

[0005] The utility model solves the technical problem by adopting a technical solution: an insulator casting mold, comprising a lower mold base and an upper mold base, a mold cavity is formed on both the lower mold base and the upper mold base, and an exhaust channel is formed at the outer edge of the umbrella skirt on the mold cavity. A casting hole is arranged on the top of the upper mold base.

[0006] A plurality of exhaust holes are arranged on the upper die seat at intervals along the axial direction.

[0007] The exhaust hole portion includes a through hole formed on the upper die seat with its axis extending in the vertical direction and a lower end of the through hole extending to the wave crest edge of the umbrella portion, that is, the through hole corresponds to and matches the large-diameter umbrella portion in the umbrella portion.

[0008] Optionally, there is at least one umbrella portion between two adjacent exhaust hole portions.

[0009] Optionally, the exhaust hole portion further comprises a screw rod and a column block. An axial through hole is formed on the screw rod.

[0010] A ridge protruding downward is formed on the lower end surface of the column block, and side holes are distributed on the side wall of the ridge.

[0011] A threaded countersunk hole is formed on the upper end surface of the column block, and a communicating hole group is provided on the bottom surface of the threaded countersunk hole, and each communicating hole in the communicating hole group is connected to the corresponding side hole respectively;

[0012] A countersunk hole corresponding to and matching the column block is formed at the lower end of the through hole. After the column block is inserted into the countersunk hole, the lower end surface of the ridge of the column block can be tangent to the top surface of the umbrella portion.

[0013] The lower part of the screw rod matches the threaded countersunk hole, so that the screw rod and the column block are fixedly connected together.

[0014] The upper end of the screw rod extends out of the upper end of the through hole and is matched with a nut. The outer diameter of the nut is greater than the inner diameter of the upper end of the through hole.

[0015] Twisting the nut to adjust the height position of the nut on the screw can cause the screw to pull the column block upward, thereby adjusting the positional relationship between the lower end surface of the spine and the top surface of the umbrella portion of the column block. Generally, it is required that the lower end surface of the spine is relatively above the top surface of the umbrella portion. The best state is that the lower end surface of the spine is tangent to the top surface of the umbrella portion.

[0016] The axial through hole on the screw rod and the connecting hole group and the side hole on the column block can form an exhaust channel connecting the mold cavity with the outside.

[0017] Optionally, the ridge is in the shape of a long narrow strip. The lower end surface of the ridge is an upwardly concave arc surface, and the curvature is consistent with the curvature of the top of the umbrella part.

[0018] Optionally, the ridge extends in a direction along a circumferential extension of the arc surface of the umbrella portion.

[0019] Optionally, the through hole is a stepped through hole and an upper countersunk hole is formed at the upper portion of the stepped through hole. The inner diameter of the upper countersunk hole is greater than the outer diameter of the screw. The inner diameter of a section of the middle portion of the stepped through hole is consistent with the outer diameter of the screw.

[0020] A spring is sleeved on a section of the screw rod in the upper countersunk hole, so that the spring is in a compressed state. The outer diameter of the nut is greater than the inner diameter of the upper countersunk hole.

[0021] The beneficial effect of the utility model is that the patent can improve the exhaust effect of the insulator casting mold and reduce the possibility of pores on the surface of the insulator after casting. The solution provides an exhaust hole portion on the upper mold base, so that the umbrella position of each part of the mold cavity can achieve good exhaust during the entire casting process, thereby greatly reducing the possibility of pores on the surface of the insulator after casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the top view of the lower mold base.

[0023] Figure 2 It is a schematic diagram of the top structure of the upper mold base.

[0024] Figure 3 It is a schematic diagram of the transverse cross-sectional structure after the upper die base and the lower die base are buckled together.

[0025] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0026] Figure 5a Schematic diagram of the cross-sectional structure of a conical column block.

[0027] Figure 5b Schematic diagram of the top view of the conical column block.

[0028] In the figure: 10 lower die base, 20 upper die base, 21 stepped through hole, 211 conical countersunk hole; 30 die cavity, 31 umbrella portion;

[0029] 40 exhaust channel, 50 pouring port; 60 exhaust hole portion, 61 screw, 611 axial through hole, 62 column block, 621 connecting hole group, 622 ridge, 623 threaded countersunk hole, 624 side hole, 63 nut, 64 spring. DETAILED DESCRIPTION

[0030] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0031] like Figures 1 to 4 , Figure 5a , Figure 5b The insulator casting mold shown in the figure comprises a lower mold base 10 and an upper mold base 20, a mold cavity 30 is formed on both the lower mold base 10 and the upper mold base 20, and an exhaust channel 40 is formed at the outer edge of the umbrella portion 31 on the mold cavity 30. A pouring port 50 (pouring hole) is provided at the top of the upper mold base 20.

[0032] In the present patent solution, on the upper die seat 20, along the axial direction ( Figure 2 A plurality of exhaust hole portions 60 are alternately distributed (in the left and right directions shown).

[0033] The exhaust hole portion 60 includes a stepped through hole 21 formed on the upper die base 20 and extending in the vertical direction, a screw rod 61 , a column block 62 , and a nut 63 and a spring 64 matched with the upper portion of the screw rod 61 .

[0034] The lower end of the stepped through hole 21 is extended to the wave crest edge of the umbrella portion 31 (on the upper die seat 20 ), so that the stepped through hole 21 is matched with the large-diameter umbrella portion of the umbrella portion 31 .

[0035] One (small-diameter) umbrella portion may be disposed between two adjacent exhaust hole portions 60 , or two small-diameter umbrella portions and one large-diameter umbrella portion may be disposed between two adjacent exhaust hole portions 60 .

[0036] An axial through hole 611 is formed on the rod body of the screw rod 61 .

[0037] A ridge 622 protruding downward is formed on the lower end surface of the column block 62 , and side holes 624 are distributed on the side walls of the ridge 622 .

[0038] A threaded countersunk hole 623 is formed on the upper end surface of the column block 62 , and a communicating hole group 621 is provided on the bottom surface of the threaded countersunk hole 623 , and each communicating hole in the communicating hole group 621 is connected to the side hole 624 correspondingly.

[0039] The lower end of the stepped through hole 21 is formed with a counterbore 211 corresponding to the column block 62. After the column block 62 is inserted into the counterbore 211, the lower end surface of the ridge 624 of the column block 62 can be tangent to the top surface (maximum outer diameter) of the umbrella portion 31.

[0040] The lower portion of the screw rod 61 matches the threaded counterbore 623 , thereby fixing the screw rod 61 and the column block 62 together.

[0041] The upper end of the screw rod 61 extends out of the upper end of the stepped through hole 21 and matches the nut 63. The outer diameter of the nut 63 is greater than the inner diameter of the upper end of the stepped through hole 21.

[0042] Twisting the nut 63 to adjust the height position of the nut 63 on the screw rod 61 can cause the screw rod 61 to pull the column block 62 upward to adjust the positional relationship between the lower end surface of the ridge 622 of the column block 62 and the top surface of the umbrella portion 31. Generally, it is required that the lower end surface of the ridge 622 is relatively above the top surface of the umbrella portion 31. The optimal state is that the lower end surface of the ridge 322 is tangent to the top surface of the umbrella portion 31.

[0043] The axial through hole 611 on the screw 61 and the connecting hole group 621 and the side hole 624 on the column block 62 can form an exhaust passage connecting the mold cavity 30 with the outside. Because the side hole 624 is located above the lower end surface of the ridge 622, the (height) position is obviously higher than the top surface of the umbrella part 31, so it can always be in a conductive state during pouring.

[0044] The ridge 622 can be made into a narrow and long strip. The lower end surface of the ridge 622 is an upwardly concave arc surface and the arc is consistent with the arc of the top of the umbrella part.

[0045] The (length) extension direction of the ridge portion 622 is in the circumferential extension direction of the arc surface of the umbrella portion 31 .

[0046] The spring 64 is mounted on a section of the screw rod 61 at the upper part of the stepped through hole 611. The spring 64 can be kept in a compressed state by screwing the nut 63, so that the screw rod 61 always exerts an upward pulling force on the column block 62, prompting the column block 62 to remain in the state of being placed inside the countersunk hole 211 at the lower end of the stepped through hole 21. It can be seen that the outer diameter of the nut 63 is larger than the inner diameter of the countersunk hole formed at the upper part of the stepped through hole 21, and the spring 64 is placed in the countersunk hole at the upper part of the stepped through hole 21.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical concept disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An insulator casting mold, comprising a lower mold base and an upper mold base, wherein a mold cavity is formed on both the lower mold base and the upper mold base, and an exhaust channel is formed at the outer edge of the shed on the mold cavity; a pouring hole is provided at the top of the upper mold base; and the characteristics are: A plurality of exhaust holes are arranged alternately along the axial direction on the upper die seat; the exhaust holes include through holes formed on the upper die seat and extending along the axis in the vertical direction, and the lower end of the through hole extends to the wave crest edge of the umbrella portion.

2. The insulator casting mold according to claim 1, characterized in that: There is at least one umbrella portion between two adjacent exhaust hole portions.

3. The insulator casting mold according to claim 1 or 2, characterized in that: The exhaust hole portion further includes a screw and a column block; a countersunk hole corresponding to and matching the column block is formed at the lower end of the through hole; the column block can be inserted into the countersunk hole; An axial through hole is formed on the screw; The lower end surface of the column block is formed with a ridge protruding downward, and side holes are distributed on the side wall of the ridge; A threaded countersunk hole is formed on the upper end surface of the column block, and a communicating hole group is provided on the bottom surface of the threaded countersunk hole, and each communicating hole in the communicating hole group is connected to the corresponding side hole respectively; The lower end of the screw rod matches the threaded countersunk hole, and the upper end extends out of the through hole and matches a nut; The outer diameter of the nut is greater than the inner diameter of the upper port of the through hole.

4. The insulator casting mold according to claim 3, characterized in that: The ridge is in the shape of a long narrow strip; the lower end surface of the ridge is an upwardly concave arc surface, and the curvature is consistent with the curvature of the top of the umbrella part.

5. The insulator casting mold according to claim 4, characterized in that: The extension direction of the ridge portion is in the circumferential extension direction of the arc surface of the umbrella portion.

6. The insulator casting mold according to claim 3, characterized in that: The ridge is in the shape of a long narrow strip; the extension direction of the ridge is in the circumferential extension direction of the arc surface of the umbrella part.

7. The insulator casting mold according to claim 3, characterized in that: The through hole is a stepped through hole and an upper countersunk hole is formed at the upper part of the stepped through hole; The inner diameter of the upper countersunk hole is larger than the outer diameter of the screw rod; the inner diameter of a section of the middle portion of the stepped through hole is consistent with the outer diameter of the screw rod; A spring is sleeved on a section of the screw rod in the upper countersunk hole so that the spring is in a compressed state; and the outer diameter of the nut is greater than the inner diameter of the upper countersunk hole.

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