Lightning arrester core vulcanization mold

Abstract

The utility model relates to the technical field of lightning arrester manufacturing, in particular to a lightning arrester core vulcanization mold which comprises an upper mold and a lower mold, mold positioning grooves are formed in the inner side of the upper mold and the inner side of the lower mold, and lightning arrester cores are arranged in the positioning grooves. Through grooves extending out of the outer surfaces of the upper mold and the lower mold are formed in the positions, located at the two ends of the positioning groove, of the upper mold and the lower mold correspondingly, positioning rods are arranged in the through grooves, threaded grooves are formed in the two ends of the lightning arrester core correspondingly, and the threaded grooves are connected with the positioning rods through the threaded rods. Sealing rings for preventing rubber from flowing out of the space between the positioning rods and the through grooves are arranged on the threaded rods; clamping grooves are formed in the two sides of the lower mold; according to the utility model, the upper die and the lower die both adopt the integral design, and the discharge grooves are formed in the two sides of the positioning groove, so that the generation of flashes on the lightning arrester core body can be reduced under the extrusion of the upper die; and the end part of the through groove is sealed through the sealing ring, so that the rubber is prevented from flowing out of a gap between the positioning rod and the through groove to form a flash in the mold closing process.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arrester manufacturing, in particular to a lightning arrester core vulcanization mold. Background Art

[0002] Lightning arresters are widely used in various power systems to absorb lightning energy and eliminate transient overvoltages, protecting electrical equipment in these systems. During the production process, the arrester core undergoes a vulcanization treatment to increase its insulation and durability.

[0003] In the prior art, the vulcanization of the arrester core utilizes a cavity of a specific shape, and a pre-formed and shaped film of a certain weight is placed in the lower mold, and then the arrester core is placed on the film in the cavity, and then a layer of rubber sheet is laid on the arrester core. Finally, the mold is closed for a specified time, so that the rubber sheet is vulcanized under a specific pressure and stability to form a rubber molded product. During the mold closing process, the air pressure in the molding cavity is high, and the rubber is prone to flash during the extrusion process. The molded product needs to be manually trimmed of the flash, which is labor-intensive and has a low yield rate. In addition, the product is easily damaged during the manual trimming of the flash, thereby affecting the appearance of the product. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provides a vulcanization die for a lightning arrester core body, which can reduce the generation of flash on the lightning arrester core body.

[0005] In order to achieve the above-mentioned technical objectives, the utility model proposes the following technical solutions: a vulcanization mold for a lightning arrester core, comprising an upper mold and a lower mold, wherein mold positioning grooves are provided on the inner sides of the upper mold and the lower mold, and a lightning arrester core is provided in the mold positioning grooves, and through grooves extending from the outer surfaces of the upper mold and the lower mold respectively are provided on the upper mold and the lower mold and at both ends of the mold positioning grooves, and positioning rods are provided in the through grooves, and threaded grooves are provided at both ends of the lightning arrester core, and the threaded grooves are connected to the positioning rods through threaded rods, and sealing rings are provided on the threaded rods to prevent rubber from flowing out from between the positioning rods and the through grooves, and mold positioning grooves are provided on both sides of the lower mold, and the end of the positioning rod away from the threaded rod is arranged in the slot, and positioning blocks are provided at both ends of the positioning rod.

[0006] Furthermore, there are several mold positioning grooves, and the several mold positioning grooves are linearly distributed on the lower mold, and the mold positioning grooves and the through grooves are both U-shaped structures.

[0007] Furthermore, discharge grooves are symmetrically provided on the lower mold and located on both sides of the mold positioning groove, and the discharge grooves extend out of the outer surface of the lower mold.

[0008] Furthermore, the four corners of the upper end surface of the lower mold are provided with limiting rods, and the lower end surface of the upper mold is provided with limiting holes that are compatible with the limiting rods.

[0009] Furthermore, a limiting block is provided on any one of the positioning rods and located on one side of the slot.

[0010] Compared with the prior art, the beneficial effects produced by the present invention are: 1. Both the upper mold and the lower mold adopt an integral design, and by opening discharge grooves on both sides of the mold positioning groove, the flash on the arrester core body can be reduced under the extrusion of the upper mold; 2. The end of the through groove is sealed by a sealing ring to prevent the rubber from flowing out from the gap between the positioning rod and the through groove to form flash during the mold closing process; by reducing the generation of flash, the product yield can be increased and the labor intensity of the staff can be effectively reduced; 3. Through the mutual cooperation of structures such as the positioning rod, threaded rod, mold positioning groove and card slot, the arrester core can be limited to prevent the arrester core from horizontal displacement, thereby improving the product molding effect after mold closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the lower mold structure of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the positioning rod of the utility model.

[0014] In the figure, 1. upper mold; 2. lower mold; 3. mold positioning groove; 4. lightning arrester core; 5. through groove; 6. positioning rod; 7. threaded rod; 8. sealing ring; 9. slot; 10. positioning block; 11. discharge chute; 12. limit rod; 13. limit block. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0016] like Figure 1-3As shown in the figure, the utility model provides a vulcanization mold for an arrester core body, which includes an upper mold 1 and a lower mold 2. The upper mold 1 is arranged on the top of the lower mold 2 and is driven by a hydraulic mechanism to move the upper mold 1 up and down. Mold positioning grooves 3 are provided on the inner sides of both the upper mold 1 and the lower mold 2. An arrester core body 4 is arranged in the mold positioning grooves 3. Through grooves 5 extending out of the outer surfaces of the upper mold 1 and the lower mold 2 are provided at both ends of the mold positioning grooves 3 on the upper mold 1 and the lower mold 2. A positioning rod 6 is arranged in the through groove 5. Thread grooves are provided at both ends of the arrester core body 4, and the thread grooves are connected to the positioning rod 6 through threaded rods 7. Sealing rings 8 for preventing rubber from flowing out between the positioning rod 6 and the through groove 5 are arranged on the threaded rods 7. Clamping grooves 9 are provided on both sides of the lower mold 2. The end of the positioning rod 6 far away from the threaded rod 7 is arranged in the clamping groove 9, and positioning blocks 10 are fixedly arranged at both ends of the positioning rod 6.

[0017] As Figure 1 and 2 shown in the figure, the arrester core body 4 is limited between the clamping grooves 9 on both sides of the lower mold 2 through the threaded rod 7, the positioning rod 6 and the positioning block 10, which can prevent the arrester core body 4 from shifting in the front-back and left-right directions when the upper mold 1 and the lower mold 2 are closed, resulting in the arrester core body 4 not being covered with rubber or the rubber coating being uneven, affecting the quality of the product after closing the mold; during the process of closing the mold, the upper mold 2 extrudes the rubber sheet, and the excess rubber overflows; by setting the sealing ring 8 to seal the end of the through groove 5, it can effectively prevent the rubber at the end of the arrester core body 4 from flowing out through the gap between the positioning rod 6 and the through groove 5 to form flash during the process of closing the mold, improving the vulcanization yield rate, effectively reducing the labor intensity of workers, and ensuring the appearance of the finished product. The sealing ring 8 in this embodiment is selected as a sealing ring made of high-temperature and high-pressure resistant material to prevent the sealing ring 8 from softening under high temperature and high pressure and reducing the sealing effect.

[0018] The number of the mold positioning grooves 3 is several, and several of the mold positioning grooves 3 are linearly distributed on the lower mold 2. The mold positioning grooves 3 and the through grooves 5 are both U-shaped structures.

[0019] As Figure 2 shown in the figure, when the upper mold 1 and the lower mold 2 are closed, vulcanization operations can be carried out on multiple arrester core bodies 4 simultaneously, improving the working efficiency. The mold positioning grooves 3 on the upper mold 1 and the mold positioning grooves 3 on the lower mold 2 form a molding cavity for the arrester core body 4. The through grooves 5 on the upper mold 1 and the through grooves 5 on the lower mold 2 form a cavity for accommodating the positioning rod 6. The positioning rod 6 is allowed to move up and down in the clamping groove 9, but is not allowed to displace in the front-back and left-right directions, ensuring the vulcanization quality of the arrester core body 4.

[0020] On the lower mold 2 and symmetrically on both sides of the mold positioning grooves 3, discharge grooves 11 in a C-shaped structure are provided, and the discharge grooves 11 extend out of the outer surface of the lower mold 2, and two adjacent discharge grooves 11 are interconnected.

[0021] like Figure 1 As shown, during the process of closing the upper mold 1 and the lower mold 2, the bottom surface of the upper mold 1 is squeezed between the mold positioning groove 3 and the discharge groove 11 of the upper mold 2, and a strip-shaped protrusion with the same structure as the discharge groove 11 is formed between the edge of the mold positioning groove 3 and the edge of one side of the discharge groove 11 compared to the mold positioning groove 3 and the discharge groove 11. After the protrusion contacts the bottom of the upper mold 1, the rubber on the protrusion is squeezed out, so that no burrs are generated on the surface of the arrester core 4.

[0022] Limiting rods 12 are fixedly provided at the four corners of the upper end surface of the lower mold 2 , and limiting holes adapted to the limiting rods 12 are opened on the lower end surface of the upper mold 1 .

[0023] like Figure 1 and 2 As shown, the limiting rod 12 and the limiting hole cooperate with each other so that the upper mold 1 can quickly dock with the lower mold 2 during the downward movement, thereby increasing work efficiency.

[0024] A limiting block 13 is fixedly provided on any one of the positioning rods 6 and located on one side of the slot 9 .

[0025] like Figure 3 As shown, the limiting block 13 can further improve the limiting effect of the arrester core 4.

[0026] Principle of use: first put the sealing ring 8 on the threaded rod 7, then thread the threaded rod 7 into the threaded holes at both ends of the arrester core 4, and at the same time place the rubber sheet to be vulcanized in the mold positioning groove 3 of the lower mold 2, and then place the arrester core 4 and the positioning rod 6 on the rubber sheet in the mold positioning groove 3 and the through groove 5 respectively, and insert the end of the positioning rod 6 into the card slot 9. Under the action of the positioning block 10, the arrester core 4 does not move forward and backward or left and right, and then place another rubber sheet on the arrester core 4, and the upper mold 1 moves down to limit the movement of the arrester core 4. The positioning rod 12 is inserted into the limiting hole to extrude the arrester core 4 in the lower mold 2. During the extrusion process, excess rubber can flow out from the discharge trough 11, and the arrester core 4 and the positioning rod 6 move downward at the same time. The sealing ring 8 falls into the mold positioning groove 3 and contacts the end face of the through groove 5, sealing the end of the through groove 5 to prevent the rubber from flowing out from the gap between the positioning rod 6 and the through groove 5 to form flash. At the same time, the upper mold 1 squeezes out the rubber between the mold positioning groove 3 and the discharge trough 11 to reduce the generation of flash on the surface of the arrester core 4.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitute similar methods to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A vulcanization mold for a lightning arrester core, characterized by: The invention comprises an upper mold (1) and a lower mold (2), wherein mold positioning grooves (3) are provided on the inner sides of the upper mold (1) and the lower mold (2), a lightning arrester core (4) is provided in the mold positioning grooves (3), through grooves (5) extending from the outer surfaces of the upper mold (1) and the lower mold (2) are provided on both ends of the mold positioning grooves (3), and the through grooves (5) are respectively provided. A positioning rod (6) is provided in the through grooves (5), and a threaded groove is provided at both ends of the lightning arrester core (4). The threaded grooves are connected to the positioning rod (6) through a threaded rod (7), and a sealing ring (8) is provided on the threaded rod (7) to prevent rubber from flowing out from between the positioning rod (6) and the through grooves (5). A clamping groove (9) is provided on both sides of the lower mold (2), and an end of the positioning rod (6) away from the threaded rod (7) is provided in the clamping groove (9), and a positioning block (10) is provided at both ends of the positioning rod (6).

2. The arrester core vulcanization mold according to claim 1, characterized in that: There are several mold positioning grooves (3), and the several mold positioning grooves (3) are linearly distributed on the lower mold (2). The mold positioning grooves (3) and the through grooves (5) are both U-shaped structures.

3. The arrester core vulcanization mold according to claim 2, characterized in that: Discharge grooves (11) are symmetrically provided on the lower mold (2) and located on both sides of the mold positioning groove (3), and the discharge grooves (11) extend out of the outer surface of the lower mold (2).

4. The arrester core vulcanization mold according to claim 2, characterized in that: Limiting rods (12) are provided at the four corners of the upper end surface of the lower mold (2), and limiting holes matching the limiting rods (12) are opened on the lower end surface of the upper mold (1).

5. The arrester core vulcanization mold according to claim 1, characterized in that: A limiting block (13) is provided on any one of the positioning rods (6) and located on one side of the slot (9).

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