Inner cone insulator epoxy resin casting mold structure

Abstract

The utility model discloses an inner cone insulator epoxy resin casting mold structure, which comprises an upper mold sleeve, a lower mold sleeve and an anti-suffocation structure, the anti-suffocation structure comprises a flash groove and an air guide groove, the flash groove is arranged at the bottom of the upper mold sleeve, the bottom opening of the flash groove at the top of the lower mold sleeve is sealed to form a sealed cavity, and the air guide groove is arranged in the cavity. According to the utility model, the design structure is reasonable, the semi-closed flash groove is arranged at the corner between the upper die sleeve and the lower die sleeve, and then the corner is communicated with the flash groove through the air guide groove, so that the flash groove is communicated with the inner part of the outer wall cavity, and the trapped air is transferred into the flash groove along the air guide groove. Therefore, trapped gas and a small amount of overflowing materials are transferred into the overflowing material groove, the appearance quality of a pouring piece is guaranteed, loss of raw materials is reduced, and the problems that the follow-up machining amount is increased, raw materials are wasted and the appearance quality of parts is affected due to the fact that the outlet position of an exhaust structure of an existing pouring mold needs to be higher than the liquid level of the pouring raw materials are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting moulds, in particular to an epoxy resin casting mould structure for an inner cone insulator. Background Art

[0002] The inner cone insulator is an electrical insulating component for high-voltage switches used in 220KV dry-type insulation terminals. Its material is a paste made of epoxy resin + SiO2 + curing agent in proportion. The color is milky white and it is formed by vacuum casting. When in use, the inner wall of the mold is usually not straight up and down. For example, there are straight and narrow corners on the casting mold of the inner cone insulator, which is very prone to air entrapment. Air entrapment can easily directly cause problems such as material shortage and air marks.

[0003] A zinc-aluminum anode casting mold with an exhaust duct structure is disclosed in a Chinese utility model patent with publication number CN212443214U. The blocking plate and the arc block are lifted up by the fourth support, so that the mold groove is connected to the exhaust duct and opened. During the casting, the gas is gradually discharged to the outside, thereby avoiding trapped gas. However, although the exhaust structure can play the role of exhaust, the outlet position of the exhaust structure needs to be higher than the liquid level of the casting raw material to avoid the outflow of raw materials and the flow of a large amount of raw materials into the regional position of the exhaust structure as the casting proceeds. These areas do not belong to the cavity area of ​​the casting parts, which increases the subsequent processing volume and wastes more raw materials, and also affects the appearance quality of the parts. For this reason, we provide an inner cone insulator epoxy resin casting mold structure to solve the above problems. Utility Model Content

[0004] The utility model aims to make up for the deficiencies of the prior art and provides an epoxy resin casting mold structure for an inner cone insulator.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An epoxy resin casting mold structure for an inner cone insulator comprises an upper mold plate, an upper mold sleeve, a lower mold sleeve and a lower mold plate connected in sequence, wherein the upper mold plate, the upper mold sleeve, the lower mold sleeve and the lower mold plate jointly form a closed outer wall cavity, and the outer wall cavity is used for forming the outer wall of the inner cone insulator; a mold core is installed in the outer wall cavity, and is used for forming the inner wall of the inner cone insulator, and the top and bottom of the mold core are respectively connected to the upper mold plate and the lower mold plate;

[0007] An anti-gas holding structure is provided at the corner between the upper mold sleeve and the lower mold sleeve, and the anti-gas holding structure includes an overflow groove, which is opened at the bottom of the upper mold sleeve, and the bottom opening of the overflow groove is distributed downward to form a semi-closed cavity, and the bottom opening of the overflow groove is closed by the top of the lower mold sleeve to form a sealed cavity, and an air guide groove is opened at the bottom of the upper mold sleeve, and the two sides of the air guide groove are respectively connected with the overflow groove and the outer wall cavity, so that the trapped air can be transferred to the overflow groove along the air guide groove.

[0008] Furthermore, the bottom of the upper mold plate is detachably connected with a second insert and a third insert, the second insert is sleeved on the outer surface of the mold core; the third insert is located between the second insert and the upper mold sleeve; the top of the lower mold plate is sleeved with a first insert, the top of the first insert is sleeved on the bottom of the mold core

[0009] Furthermore, sealing grooves are provided at the bottom of the upper mold sleeve, the top of the upper mold sleeve, the top of the lower mold plate and the connecting portion between the mold core and the upper mold plate. Sealing ropes are provided in the sealing grooves for sealing the forming cavity formed by the outer wall cavity and the mold core; the sealing groove at the bottom of the upper mold sleeve is located on the outside of the overflow groove annular structure.

[0010] Furthermore, a tightening bolt is threadedly connected to the upper mold plate, and the upper mold plate is connected to the mold core via a tightening bolt;

[0011] A positioning hole is provided at the bottom of the first insert; a guide column is connected to the top of the lower template, and the top end of the guide column is plugged into the positioning hole for positioning and installing the first insert.

[0012] Furthermore, an anti-collision block is provided at the bottom of the mold core, and the bottom of the anti-collision block is plugged into the first insert.

[0013] Furthermore, the bottom of the upper mold plate is detachably connected to a guide rod, and the bottom end of the guide rod passes through the upper mold sleeve and the lower mold sleeve in sequence.

[0014] Furthermore, at least three pouring openings are provided on the top of the upper template, and the pouring openings are fan-shaped.

[0015] Furthermore, the outer wall of the lower mold sleeve is connected to a vertical plate, and the bottom of the vertical plate is connected to a bottom plate.

[0016] Furthermore, a tightening structure is provided at the top of the lower template, the bottom of the tightening structure passes through the bottom of the lower template and extends to the outside of the outer wall cavity, and the top of the tightening structure contacts the bottom of the first insert.

[0017] Furthermore, a through hole is provided at the bottom of the lower template; the tightening structure includes a threaded rod, one end of the threaded rod is located outside the outer wall cavity, and the other end of the threaded rod passes through the through hole and is connected to a tightening block, the tightening block is embedded in the top of the lower template, and the upper surface of the tightening block is in contact with the bottom of the first insert, and the threaded rod is threadedly connected to the through hole.

[0018] Compared with the prior art, the epoxy resin casting mold structure of the inner cone insulator has the following beneficial effects:

[0019] 1. The utility model provides a semi-enclosed overflow groove at the corner between the upper mold sleeve and the lower mold sleeve, and forms a closed cavity through the overflow groove by the lower mold sleeve, and then connects the corner with the overflow groove through the air guide groove, so as to facilitate the transfer of trapped air and a small amount of overflow to the overflow groove, thereby ensuring the appearance quality of the casting and reducing the loss of raw materials, and solving the problem that the outlet position of the exhaust structure of the existing casting mold needs to be higher than the liquid level of the casting raw material, which increases the subsequent processing amount and wastes more raw materials, and also affects the appearance quality of the parts.

[0020] Second, when assembling the mold, the utility model sets a tension bolt and a tightening bolt to ensure close contact between the first insert and the mold core to prevent the raw material from flowing into the interior. At the same time, when demolding, the tightening block is used to push the first insert and the mold core upward, and the auxiliary crane sling lifts the mold core to improve the demolding efficiency and avoid the problem of damage caused by traditional knocking on the first insert for demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a cross-sectional view of the lower die sleeve of the utility model;

[0023] Figure 3 For the utility model Figure 2 A schematic diagram of the structure at A;

[0024] Figure 4 It is a cross-sectional view of the upper die sleeve of the utility model;

[0025] Figure 5 It is a cross-sectional view of the lower mold sleeve in the utility model.

[0026] In the figure: 1. upper template; 2. upper mold sleeve; 3. lower mold sleeve; 4. guide column; 5. lower template; 6. mold core; 7. first insert; 8. second insert; 9. third insert; 10. sealing groove; 11. air guide groove; 12. overflow groove; 13. pouring port; 14. anti-collision block; 15. guide rod; 16. vertical plate; 17. bottom plate; 18. tightening block; 19. threaded rod; 20. tension bolt; 21. tightening bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1-5 As shown, the utility model provides a technical solution: an epoxy resin casting mold structure for an inner cone insulator, comprising an upper mold plate 1, an upper mold sleeve 2, a lower mold sleeve 3 and a lower mold plate 5 connected in sequence, the upper mold plate 1, the upper mold sleeve 2, the lower mold sleeve 3 and the lower mold plate 5 together form a closed outer wall cavity, the outer wall cavity is used for forming the outer wall of the inner cone insulator; a mold core 6 is installed in the outer wall cavity, which is used for forming the inner wall of the inner cone insulator, and the top and bottom of the mold core 6 are respectively connected to the upper mold plate 1 and the lower mold plate 5; the top of the lower mold plate 5 is sleeved with a first insert 7, and the top of the first insert 7 is sleeved on the bottom of the mold core 6;

[0029] An anti-gas holding structure is provided at the corner between the upper die sleeve 2 and the lower die sleeve 3. The anti-gas holding structure includes an overflow groove 12. The overflow groove 12 is provided at the bottom of the upper die sleeve 2. The bottom opening of the overflow groove 12 is distributed downward to form a semi-enclosed cavity, and the bottom opening of the overflow groove 12 is closed by the top of the lower die sleeve 3 to form a sealed cavity. An air guide groove 11 is provided at the bottom of the upper die sleeve 2. Both sides of the air guide groove 11 are respectively connected with the overflow groove 12 and the outer wall cavity, so that the trapped air is transferred to the overflow groove 12 along the air guide groove 11;

[0030] The detachable connections of the upper mold plate 1, the upper mold sleeve 2, the mold core 6, etc. can be installed and assembled with mold bolts. When in use, the outer wall cavity and the inner wall cavity together form the outer shape of the inner cone insulator, and then raw materials such as epoxy resin are injected between the outer cavity and the inner wall cavity. At the same time, the air is gradually discharged as the raw materials are injected. For the gas at the corner between the upper mold sleeve 2 and the lower mold sleeve 3, under the extrusion of the raw material liquid, it gradually enters the overflow groove 12 along the air guide groove 11, and then the trapped gas is transferred to the overflow groove 12. At the same time, the overflow groove 12 is a closed cavity, and its volume is adapted to the size of the corner and the volume of the parts, so that after the trapped gas is transferred to the overflow groove 12, it reverses to resist the entry of the raw material, so as to prevent the raw material from entering the interior too much, thereby reducing the loss of the raw material.

[0031] Both the air guide groove 11 and the overflow groove 12 are annular structures, the inner wall of the air guide groove 11 is lower than the top of the inner wall of the overflow groove 12, and the width of the air guide groove 11 is the same as the width between the inner side of the annular overflow groove 12 and the inner wall of the upper mold sleeve 2, so that the air guide groove 11 is connected with the bottom and the inner side of the upper mold sleeve 2 at the same time; when in use, since the inner wall of the air guide groove 11 is lower than the top of the inner wall of the overflow groove 12, the trapped air enters the overflow groove 12, and at the same time, the upper and lower heights of the air guide groove 11 are reduced, so as to reduce the epoxy resin raw material that can be poured in the air guide groove 11, thereby reducing the loss of raw materials.

[0032] The bottom of the upper mold plate 1 is detachably connected with a second insert 8 and a third insert 9, and the second insert 8 is sleeved on the outer surface of the mold core 6; the third insert 9 is located between the second insert 8 and the upper mold sleeve 2; the first insert 7, the second insert 8 and the third insert 9 are all metal inserts cast together. The metal insert is a key component connecting the external component with the insulating component, which can ensure a tight and reliable combination with the insulating material, and can also ensure the rationality of the electrical field and / or reliable electrical contact.

[0033] Sealing grooves 10 are provided at the bottom of the upper mold sleeve 2, the top of the upper mold sleeve 2, the top of the lower mold plate 5 and the connection between the mold core 6 and the upper mold plate 1. Sealing ropes are provided in the sealing grooves 10 to seal the forming cavity formed by the outer wall cavity and the mold core 6; the sealing groove 10 at the bottom of the upper mold sleeve 2 is located on the outside of the annular structure of the overflow groove 12.

[0034] A tightening bolt 21 is threadedly connected to the upper template 1, and the upper template 1 is connected to the core mold 6 by a tightening bolt 20; a positioning hole is provided at the bottom of the first insert 7; a guide column 4 is connected to the top of the lower template 5, and the top end of the guide column 4 is plugged into the positioning hole for positioning and installing the first insert 7; when in use, first install the parts in order, then tighten the tightening bolt 21, so that the bottom end of the tightening bolt 21 moves downward, supporting the core mold 6 from top to bottom, and then tighten the tightening bolt 20 to ensure that the first insert 7 and the core mold 6 are tightly fitted to prevent the resin from overflowing into the first insert 7.

[0035] An anti-collision block 14 is provided at the bottom of the mold core 6, and the bottom of the anti-collision block 14 is plugged into the first insert 7; the size of the anti-collision block 14 is adapted to the inner diameter of the first insert 7, so that it is easy to insert into the interior. The anti-collision block 14 is a polytetrafluoro guide block. During installation, the anti-collision block 14 is located at the bottom of the mold core 6, so that the mold core 6 is gradually inserted into the first insert 7 when it moves downward, so as to prevent collision damage to the inner wall of the first insert 7.

[0036] The bottom of the upper mold plate 1 is detachably connected to a guide rod 15, and the bottom end of the guide rod 15 passes through the upper mold sleeve 2 and the lower mold sleeve 3 in sequence; when the number of guide rods 15 is at least two, several guide rods 15 are distributed in a circular array, which is used to limit the downward movement of the upper mold sleeve 2 and the upper mold plate 1, so that the cross-sections of the upper mold sleeve 2, the lower mold sleeve 3 and the mold core 6 are concentric circles, thereby avoiding the second insert 8 and the third insert 9 inside and the mold core 6 from shaking when moving downward, and preventing the second insert 8 and the third insert 9 from colliding with the lower mold sleeve 3.

[0037] At least three pouring openings 13 are provided on the top of the upper template 1. The pouring openings 13 are fan-shaped. When in use, one of the openings is used for pouring, and the other two openings are risers. A processing allowance is left at the pouring opening end for pouring and shrinkage compensation.

[0038] The outer wall of the lower mold sleeve 3 is connected to a vertical plate 16, and the bottom of the vertical plate 16 is connected to a bottom plate 17; the vertical plate 16 and the lower mold sleeve 3 are connected by bolts, and the number of vertical plates 16 is at least one. When the number of vertical plates 16 is two or more, multiple vertical plates 16 are distributed on the bottom plate 17 in a circular array and are fixedly connected to the bottom plate 17.

[0039] A tightening structure is provided at the top of the lower template 5, and the bottom of the tightening structure passes through the bottom of the lower template 5 and extends to the outside of the outer wall cavity. The top of the tightening structure contacts the bottom of the first insert 7, which is used to assist in demoulding the first insert 7; a through hole is provided at the bottom of the lower template 5; the tightening structure includes a threaded rod 19, one end of the threaded rod 19 is located outside the outer wall cavity, and the other end of the threaded rod 19 passes through the through hole and is connected to a tightening block 18, the tightening block 18 is embedded in the top of the lower template 5, and the upper surface of the tightening block 18 contacts the bottom of the first insert 7, and the threaded rod 19 is threadedly connected to the through hole; the threaded rod 19 adopts a trapezoidal thread, and a crank is provided at the bottom of the threaded rod 19, and a driving mechanism can also be provided at the bottom of the threaded rod 19, and the upper template 1 A lifting ring is provided on it; when in use, first hook the lifting ring on the upper template 1 through the driving lifting belt, then remove the guide column 4 between the first insert 7 and the lower template 5, and remove the bolts between the upper mold sleeve 2 and the lower mold sleeve 3, and then rotate the crank at the bottom of the threaded rod 19 to make the threaded rod 19 drive the tightening block 18 to move upward, and then the tightening block 18 pushes the first insert 7 to move upward, and then the first insert 7 drives the workpiece to move upward, and at the same time cooperates with the driving lifting belt to lift it upward, so as to realize the core 6 and the first insert 7 to be lifted upward, so that the workpiece is detached from the lower mold sleeve 3, and then the screws for tightening the second insert 8 and the third insert 9 and the bolts between the lower mold sleeve 5 and the core 6 are removed in turn, so as to realize the complete demoulding of the workpiece.

Claims

1. An epoxy resin casting mold structure for an inner cone insulator, characterized in that: The invention comprises an upper mold plate (1), an upper mold sleeve (2), a lower mold sleeve (3) and a lower mold plate (5) which are connected in sequence, wherein the upper mold plate (1), the upper mold sleeve (2), the lower mold sleeve (3) and the lower mold plate (5) together form a closed outer wall cavity, and the outer wall cavity is used for forming the outer wall of the inner cone insulator; a mold core (6) is installed in the outer wall cavity, and is used for forming the inner wall of the inner cone insulator; the top and bottom of the mold core (6) are respectively connected to the upper mold plate (1) and the lower mold plate (5); An anti-gas holding structure is provided at the corner between the upper mold sleeve (2) and the lower mold sleeve (3), and the anti-gas holding structure includes an overflow groove (12). The overflow groove (12) is opened at the bottom of the upper mold sleeve (2), and the bottom opening of the overflow groove (12) is distributed downward to form a semi-closed cavity, and the bottom opening of the overflow groove (12) is closed by the top of the lower mold sleeve (3) to form a sealed cavity. An air guide groove (11) is opened at the bottom of the upper mold sleeve (2), and the two sides of the air guide groove (11) are respectively connected to the overflow groove (12) and the outer wall cavity, so that the trapped air can be transferred to the overflow groove (12) along the air guide groove (11).

2. The epoxy resin casting mold structure of inner cone insulator according to claim 1, characterized in that: The bottom of the upper mold plate (1) is detachably connected to a second insert (8) and a third insert (9), wherein the second insert (8) is sleeved on the outer surface of the mold core (6); and the third insert (9) is located between the second insert (8) and the upper mold sleeve (2); The top of the lower mold plate (5) is sleeved with a first insert (7), and the top of the first insert (7) is sleeved on the bottom of the mold core (6).

3. The epoxy resin casting mold structure of inner cone insulator according to claim 1, characterized in that: The bottom of the upper mold sleeve (2), the top of the upper mold sleeve (2), the top of the lower mold plate (5) and the connection portion between the mold core (6) and the upper mold plate (1) are all provided with sealing grooves (10), and sealing ropes are arranged in the sealing grooves (10) for sealing the forming cavity formed by the outer wall cavity and the mold core (6); The sealing groove (10) at the bottom of the upper die sleeve (2) is located outside the annular structure of the overflow groove (12).

4. The epoxy resin casting mold structure of inner cone insulator according to claim 2, characterized in that: The upper mold plate (1) is threadedly connected with a tightening bolt (21), and the upper mold plate (1) and the mold core (6) are connected via a tightening bolt (20); A positioning hole is provided at the bottom of the first insert (7); a guide column (4) is connected to the top of the lower template (5), and the top end of the guide column (4) is plugged into the positioning hole for positioning and installing the first insert (7).

5. The epoxy resin casting mold structure of inner cone insulator according to claim 2, characterized in that: An anti-collision block (14) is provided at the bottom of the mold core (6), and the bottom of the anti-collision block (14) is plugged into the first insert (7).

6. The epoxy resin casting mold structure of inner cone insulator according to claim 1, characterized in that: The bottom of the upper mold plate (1) is detachably connected to a guide rod (15), and the bottom end of the guide rod (15) passes through the upper mold sleeve (2) and the lower mold sleeve (3) in sequence.

7. The epoxy resin casting mold structure of inner cone insulator according to claim 1, characterized in that: The top of the upper template (1) is provided with at least three pouring openings (13), and the pouring openings (13) are in a fan shape.

8. The epoxy resin casting mold structure for inner cone insulator according to claim 1, characterized in that: The outer wall of the lower mold sleeve (3) is connected to a vertical plate (16), and the bottom of the vertical plate (16) is connected to a bottom plate (17).

9. The epoxy resin casting mold structure of inner cone insulator according to claim 2, characterized in that: A tightening structure is provided at the top of the lower template (5), the bottom of the tightening structure passes through the bottom of the lower template (5) and extends to the outside of the outer wall cavity, and the top of the tightening structure contacts the bottom of the first insert (7).

10. The epoxy resin casting mold structure of inner cone insulator according to claim 9, characterized in that: A through hole is provided at the bottom of the lower template (5); the tightening structure comprises a threaded rod (19), one end of the threaded rod (19) is located outside the outer wall cavity, and the other end of the threaded rod (19) passes through the through hole and is connected to a tightening block (18), the tightening block (18) is embedded in the top of the lower template (5), and the upper surface of the tightening block (18) is in contact with the bottom of the first insert (7), and the threaded rod (19) is threadedly connected to the through hole.

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