10kV lightning arrester vertical mold

Abstract

A 10kV lightning arrester vertical mold comprises a cavity, an upper mold plate and a lower mold plate which are connected to the upper end and the lower end of the cavity respectively, and an upper base plate and a lower base plate which are connected to the upper end of the upper mold plate and the lower end of the lower mold plate respectively. A plurality of channels for placing lightning arrester core rods are arranged in the cavity; the upper template and the lower template are respectively provided with holes of which the number is the same as that of lightning arrester mandrels, and inserts are arranged in the holes; the upper end and the lower end of the lightning arrester core rod are connected with the inserts in a matched mode through mold cores respectively. The cavity is provided with a flow channel and a material injection port, and the channel, the flow channel and the material injection port are communicated with one another. According to the utility model, by using the mold structure and changing a product material from solid silica gel to liquid silica gel, the vulcanization time is shortened from original 50 minutes to 30 minutes, and under the same equipment condition, the production efficiency is improved by more than 100%, and the energy consumption of a single product is also greatly reduced; the product does not need to be polished and the quality is obviously improved.

Description

Technical Field

[0001] The utility model relates to a mold for producing lightning arresters, in particular to a vertical mold for 10kV lightning arresters. Background Art

[0002] At present, the mold used for producing 10kV lightning arresters is a horizontal one-out-four structure, the material is solid silicone, and the mold core adopts a movable and detachable structure. The mold release method is manual prying and disassembling. However, the manual mold release method has a relatively large labor intensity, and it is easy to cause damage to the positioning parts of the mold core and the cavity channel, resulting in too large fitting dimension tolerances, frequent glue leakage at both ends, and affecting the quality of the product and the mold. For the same hot plate size of the equipment, the number of cavity channels of the horizontal mold cannot be further increased, and the production capacity and production efficiency have been low for a long time. In addition, the horizontal structure of the mold will cause flash on the outer surface of the product due to the parting surface, which needs to be manually polished, and there will be polishing marks on the product surface. If the marks are deep, it will pose a hidden danger to the electrical performance of the product. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a vertical mold for lightning arresters.

[0004] The technical solution of the utility model is: a vertical mold for 10kV lightning arresters, including a cavity, an upper template and a lower template respectively connected to the upper and lower ends of the cavity, and an upper backing plate and a lower backing plate respectively connected to the upper end of the upper template and the lower end of the lower template; a plurality of channels for placing lightning arrester core rods are arranged in the cavity; holes with the same number as the lightning arrester core rods are respectively arranged on the upper template and the lower template, and inserts are arranged in the holes; the upper and lower ends of the lightning arrester core rod are respectively connected to the inserts through the mold core in a matching manner; a runner and a feeding port are arranged on the cavity, and the channels, the runner and the feeding port are communicated with each other.

[0005] Further, the upper template and the cavity, the lower template and the cavity, and / or the upper template, the lower template and the cavity are adaptively connected through positioning parts.

[0006] Further, the mold core adopts a conical structure, which can position between the mold core and the insert, and ensure the coaxiality of both ends of the lightning arrester core rod through the inserts at both ends.

[0007] Further, the mold further includes a mold release rod that passes through the lower end of the lightning arrester core rod along the front side of the lower template and enters the rear side of the lower template.

[0008] Further, a first through hole for the ejection rod to pass through is provided at a position corresponding to the channel on the lower template, and the first through hole penetrates from the front long side to the rear long side of the lower template; second through holes for the ejection rod to pass through are respectively provided on the front and rear surfaces of the hole of the lower template, third through holes for the ejection rod to pass through are provided on the front and rear surfaces of the insert in the hole of the lower template, and a fourth through hole for the ejection rod to pass through is provided on the lower die core of the arrester core rod; and the relatively arranged first through hole, second through hole, third through hole and fourth through hole are connected and communicated, so that an ejection rod can pass through simultaneously.

[0009] Further, a charging port is provided at a lower position on the front side of the cavity, and a runner for connecting the charging port with a plurality of channels is provided in the cavity, and the runner is a one-to-two or two-to-four runner.

[0010] Further, the holes on the upper template and the lower template are stepped holes, and the shape of the insert is adapted to the stepped hole.

[0011] Further, a frosted layer is provided on the inner surface of the channel of the cavity.

[0012] Further, ejector plates are connected to both sides of the cavity for connecting the cavity with the upper hanging die of the production equipment.

[0013] Further, the upper backing plate is threadedly connected with the upper template, and the lower backing plate is threadedly connected with the lower template, and the mold is fixedly connected between the upper and lower hot plates of the equipment through the upper and lower backing plates.

[0014] The beneficial effects of the present utility model:

[0015] (1) By arranging the backing plates, templates and cavities installed in an up-and-down structure to form a vertical mold, the number of channels in the cavity can be greatly increased, the production capacity and production efficiency can be improved, and the vertical mold can avoid the generation of flash burrs on the outer surface of the arrester core rod, thereby avoiding grinding and improving the service life and safety performance;

[0016] (2) By arranging the upper and lower backing plates, it is convenient to connect and fix with the upper and lower hot plates of the equipment, and it is also convenient to lift and remove the mold and close the mold; in addition, by adding the ejector plate, the way of ejecting the cavity by the equipment can be adopted, so as to realize different ways of removing and closing the mold;

[0017] (3) By arranging the insert and the core mold, the positioning between the die core and the insert can be realized, ensuring that the arrester core rod is not eccentric during mold installation, and ensuring the coaxiality of both ends of the arrester core rod through the insert, and avoiding damage to the positioning part of the die core and the cavity channel, and further avoiding glue leakage at both ends of the arrester core rod, greatly improving the product and mold quality;

[0018] (4) By setting the positioning parts, the upper template, the lower template and the cavity can be roughly and precisely positioned, so as to facilitate mold removal, greatly improve the matching accuracy and reduce labor intensity;

[0019] (5) By setting the ejection rod, it can be ensured that the arrester core rod always rises and falls with the lower template during the mold opening process;

[0020] (6) By providing a frosted layer, the problem of failure to demold smoothly due to strong adsorption force between the arrester core rod and the cavity during demolding can be avoided;

[0021] (7) By setting up a one-to-eight flow channel, the injection efficiency can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the vertical mold of Example 1 of the utility model;

[0023] Figure 2 yes Figure 1 A top perspective view of the illustrated embodiment 1;

[0024] Figure 3 yes Figure 2 AA sectional view of the embodiment 1 shown;

[0025] Figure 4 yes Figure 2 A BB sectional view of the embodiment 1 shown;

[0026] Figure 5 yes Figure 1 The schematic diagram of the split structure of Example 1 is shown;

[0027] Figure 6 This is a schematic structural diagram of a lightning arrester core rod, a mold core and an insert in Embodiment 1 of the present utility model;

[0028] Figure 7 yes Figure 1 A schematic diagram of the specific structure of the template in Example 1 is shown;

[0029] Figure 8 yes Figure 1 A schematic diagram of the bottom structure of the cavity of Example 1 is shown.

[0030] Description of the accompanying drawings:

[0031] 1. Lower backing plate, 2. Lower template, 3. Locating pin, 4. Cavity, 5. Upper template, 6. Upper backing plate, 7. Ejector plate, 8. Guide pillar, 9. Socket head cap screw, 10. Ejector rod, 11. Lightning arrester core rod, 12. Upper insert, 13. Upper die core, 14. Lower insert, 15. Lower die core, 16. Channel, 17. Step hole, 18. Runner, 19. Injection port, 20. First through hole, 21. Second through hole, 22. Third through hole, 23. Fourth through hole. Detailed implementation mode

[0032] The following will further describe the present utility model in detail with reference to the accompanying drawings of the specification and specific embodiments.

[0033] Embodiment 1

[0034] As Figures 1 to 5 shown: A 10 kV lightning arrester vertical mold includes a cavity 4, an upper template 5 and a lower template 2 respectively connected to the upper and lower ends of the cavity 4, and an upper backing plate 1 and a lower backing plate 6 respectively connected to the upper end of the upper template and the lower end of the lower template; A plurality of channels 16 for placing the lightning arrester core rod 11 are provided in the cavity 4, and the upper and lower ends of the lightning arrester core rod 11 are respectively connected to an upper die core 13 and a lower die core 15; Step holes 17 with the same number as the lightning arrester core rod 11 are respectively provided on the upper template 5 and the lower template 2, inserts 12 and 14 are provided in the step holes 17, and the die cores at the upper and lower ends of the lightning arrester core rod are adaptively connected to the inserts; A runner 18 and an injection port 19 are provided on the cavity 4, and the channels 16, the runner 18 and the injection port 19 are connected and communicated with each other.

[0035] It can be said that the vertical mold of this embodiment is mainly divided into three parts: backing plate, template, and cavity. Among them, the backing plates are located at the top and bottom of the whole mold, and the main function is to ensure the connection and fixation of the mold to the upper and lower hot plates of the equipment and transfer heat to the mold. The cavity is the most important forming part, which can ensure that the size and appearance quality of the product meet the design requirements. The cavity is precisely positioned between the upper template and the lower template respectively.

[0036] Specifically, in this embodiment, the upper backing plate 6 and the lower backing plate 1 are both square structures. At least two slot holes are opened at the edge positions of the two long sides of each backing plate, and a number of threaded holes are provided on the surface of the backing plate. Each backing plate can be threadedly connected to the upper and lower hot plates of the equipment through the slot holes and fixed to the corresponding template through the threaded holes by socket head cap screws 9.

[0037] It can be understood that in this embodiment, ejector plates 7 are further added on both sides of the cavity 4. The ejector plates 7 are specifically arranged at the upper position on the side of the cavity 4, and the ejector plates 7 are connected to the cavity 4 by screws. The main function of the ejector plates 7 is to connect the cavity 4 with the upper die of the production equipment, and the mold ejection method is changed to the method of the equipment ejecting the cavity, that is, separating the cavity 4 from the lower template 2 to facilitate mold ejection and mold cleaning. The mold ejection difficulty and the labor intensity of the operator are reduced.

[0038] In this embodiment, in order to facilitate the positioning connection between the cavity 4 and the template for quick assembly, the template and the cavity are connected by a combination of rough positioning and fine positioning. Among them, four guide posts 8 are used for rough positioning. The guide posts 8 can pass through the cavity 4 from the lower template 2 to the upper template 5, so as to facilitate the positioning among the three. The fine positioning includes at least two positioning pins 3 connecting the upper template 5 and the cavity 4 and at least two positioning pins 3 connecting the cavity 4 and the lower template 2; for example, two positioning pins enter the cavity from the upper template to achieve the fine positioning of the two, and the other two positioning pins enter the cavity from the lower template to achieve the fine positioning of the two.

[0039] It can be understood that the positioning method of this embodiment can also adopt other methods. For example, multiple long positioning pins are used to pass through the lower template, the cavity and then enter the upper template, and then multiple short positioning pins are used to enter the cavity along the upper template, so as to realize the positioning of the three.

[0040] In this embodiment, step holes 17 with the same number as the number of arrester core rods are provided on both the upper template 5 and the lower template 2. Inserts are placed in the step holes 17. The inserts include upper inserts 12 and lower inserts 14. The upper inserts 12 are placed in the step holes of the upper template 5, and the lower inserts 14 are placed in the step holes of the lower template 2. The upper inserts 12 and the lower inserts 14 are of T-shaped structure and are adapted to the shape of the step holes 17 to facilitate insert positioning. The inserts in this embodiment are important forming components at both ends of the arrester core rod and also important positioning components to ensure the coaxiality of both ends of the arrester core rod. Preferably, both the upper template 5 and the lower template 2 are provided with ≥6 step holes 17, which is equivalent to that ≥6 arrester core rods 11 can be placed in the cavity. This embodiment further preferably sets 8 channels to form a one-out-eight structure. In addition, a plurality of threaded holes for connecting with the backing plate are provided on the surfaces of the upper template and the lower template. During installation, first positionally connect the template and the cavity, and then threadedly fix the backing plate and the template.

[0041] In this embodiment, both the upper die core 13 and the lower die core 15 adopt a conical structure, that is, the outer diameter gradually increases from the head downwards. A protrusion extends from the lower part of the die core, which can be directly inserted into the hole of the arrester core rod for easy disassembly and assembly. Or a thread is provided on the protrusion, which can be thread-fixed with the internal thread in the hole of the arrester core rod. By adopting the conical design, the die core can be positioned with the insert to ensure that the arrester core rod is not eccentric during mold installation. After the arrester core rod 11 is placed in the channel 16 of the cavity, the upper die core 13 and the lower die core 15 will extend along the channel 16 and enter the inserts of the upper template 5 and the lower template 2 respectively.

[0042] As Figure 6 and Figure 7 shown: In this embodiment, four first through holes 20 for the ejection rod 10 to pass through are provided on the lower template 2, and the first through holes 20 penetrate from the front long side to the rear long side of the lower template; second through holes 21 for the ejection rod 10 to pass through are respectively provided on the front and rear surfaces of each stepped hole 17, and third through holes 22 for the ejection rod 10 to pass through are provided on the front and rear surfaces of each lower insert 14; fourth through holes 23 for the ejection rod 10 to pass through are provided on the front and rear two surfaces of each lower die core 15. And each group of relatively arranged first through holes 20, second through holes 21, third through holes 22 and fourth through holes 23 are connected, so that one ejection rod 10 can pass through simultaneously.

[0043] For example, the 8 stepped holes 17 of the lower template and the 8 channels 16 in the corresponding cavity are both designed in a 2×4 array, that is, there are two rows in total. Each row of the lower template has four stepped holes 17, and each row of the cavity has four channels 16. In this embodiment, four ejection rods 10 need to pass through the respective through holes in the front-rear direction, that is, the ejection rod 10 penetrates into the first through hole 20 on the front long side of the lower template 2, passes through the second through hole 21 of the stepped hole 17 in the first row of the lower template, the third through hole 22 of the lower insert 14 in the stepped hole, and the fourth through hole 23 of the lower die core 15 in the lower insert, and then passes through the second through hole 21 of the stepped hole 17 corresponding to the second row of the lower template, the third through hole 22 of the lower insert 14 in the stepped hole, and the fourth through hole 23 of the lower die core 15 in the lower insert, and finally penetrates out from the rear long side of the lower template, that is, penetrates out from the rear side of the first through hole 20. In this embodiment, by providing the ejection rod 10, it can be ensured that the arrester core rod 11 always descends together with the lower template 2 during the mold opening process.

[0044] As Figure 8As shown: In this embodiment, a material injection port 19 is provided at a position below the middle of the front side of the cavity 4. A runner 18 is provided in the cavity 4 to connect the material injection port 19 with eight channels 16. The runner 18 is a one-to-two, two-to-four runner, that is, the eight channels are divided into two units. Every four adjacent channels form a unit. The bottoms of each unit are interconnected through four branch runners, respectively enabling the rubber material to enter the four channels through the four branch runners. The two units are also interconnected through two branch runners, and finally connected to the material injection port 19 through a main runner, thereby forming a one-to-two, two-to-four runner.

[0045] The working principle of this embodiment is as follows:

[0046] First, install the empty mold without the arrester core rod 11 and the ejection rod 10 on the production equipment as required. For example, first place the upper insert 12 and the lower insert 14 in the step holes 17 of the upper template and the lower template respectively, and ensure that the third through hole 22 on the lower insert is aligned with the second through hole 21 of the step hole; then pass the guide post 8 from the bottom of the lower template 2 through the cavity 4 to the upper template 5, and then insert the positioning pin 3 for precise positioning. After that, thread-fix the upper backing plate 1 and the upper template 2, and thread-fix the lower template 2 and the lower backing plate 1 to form an empty mold. Connect and fix the upper and lower backing plates of the empty mold to the upper and lower hot plates of the equipment, tighten all the screws, and perform the mold opening and closing actions after the mold is installed to ensure safety and no abnormality.

[0047] After the mold temperature meets the process requirements, open the upper template 2. The upper template and the upper backing plate are always fixed together for disassembly and assembly. For example, the upper hot plate of the equipment drives the upper template and the upper backing plate to rise simultaneously under the drive of the lifting structure to open the upper template; then place the arrester core rods 11 with the upper and lower die cores installed one by one into the lower inserts 14 of the lower template, and ensure that the fourth through hole 23 of the lower die core 15 is aligned with the third through hole 22 of the lower insert 14. Then pass the ejection rod 10 from front to back, and finally close the mold; when closing the mold, the upper insert 12 in the step hole of the upper template is adaptively inserted with the upper die core 13 of the corresponding arrester core rod 11 to ensure the coaxiality of both ends of the arrester core rod 11; after closing the mold, the hot plate of the equipment will lift the mold to an appropriate position for product injection; the rubber material enters through the material injection port 19 on the front side of the cavity, and then undergoes one-to-two, two-to-four through the runner 18 connected to the material injection port in the cavity, and finally enters the channels 16 of the eight arrester core rods.

[0048] After vulcanization, first confirm whether the ejection rod 10 is installed correctly. After ensuring correct installation, open the mold, then lower the lower hot plate of the equipment to the lowest position, withdraw the ejection rod 10, take out the arrester core rod 11, and finally take out the upper and lower die cores from the arrester core rod for the next round of production.

[0049] Embodiment 2

[0050] In this embodiment, since the outer circular straight section of the arrester core rod 11 is relatively long, the adsorption force between the arrester core rod and the channel of the cavity is large during demolding, and the problem of difficult demolding may occur. Therefore, in this embodiment, the inner surface of the channel of the cavity is sandblasted to form a sandblasted layer, thus effectively solving this problem.

[0051] In summary, on the one hand, by using this mold structure, and changing the product material from solid silicone to liquid silicone, the vulcanization time is shortened from the original 50 minutes to 30 minutes. Under the same equipment conditions, the production efficiency is increased by more than 100%, and the energy consumption per single product is also significantly reduced; the product does not need to be polished, and the quality is significantly improved; on the other hand, under the same equipment conditions, a vertical one-to-multiple mold is designed, the production efficiency is greatly improved, and the energy consumption per single product also decreases significantly; at the same time, the mold of this structure has higher precision, is easy to operate, and has a longer service life.

Claims

1. A 10kV lightning arrester vertical mold, characterized in that, It includes a cavity, an upper template and a lower template respectively connected to the upper and lower ends of the cavity, and an upper backing plate and a lower backing plate respectively connected to the upper end of the upper template and the lower end of the lower template; a plurality of channels for placing arrester core rods are provided in the cavity; holes with the same number as the arrester core rods are respectively provided on the upper template and the lower template, and inserts are provided in the holes; the upper and lower ends of the arrester core rod are respectively adaptively connected to the inserts through the die cores; a runner and a pouring port are provided on the cavity, and the channels, the runner and the pouring port are connected and communicated with each other.

2. The 10 kV lightning arrester vertical mold according to claim 1, characterized in that, The upper template and the cavity, the lower template and the cavity, and / or the upper template, the lower template and the cavity are adaptively connected through positioning members.

3. The 10kV lightning arrester vertical mold according to claim 1, characterized in that, The die core adopts a conical structure, which can position between the die core and the insert, and ensure the coaxiality of both ends of the arrester core rod through the inserts at the upper and lower ends.

4. The vertical mold for 10 kV lightning arrester according to claim 1, characterized in that, The mold further includes a demolding rod that passes through the lower end of the arrester core rod along the front side of the lower template and enters the rear side of the lower template.

5. The vertical mold for 10 kV lightning arrester according to claim 4, wherein, A first through hole for the demolding rod to pass through is provided on the lower template at a position corresponding to the channel, and the first through hole runs through the long side of the front side to the long side of the rear side of the lower template; second through holes for the demolding rod to pass through are respectively provided on the front and rear surfaces of the hole on the lower template, third through holes for the demolding rod to pass through are provided on the front and rear surfaces of the insert in the hole of the lower template, and a fourth through hole for the demolding rod to pass through is provided on the die core at the lower end of the arrester core rod; and the relatively arranged first through hole, second through hole, third through hole and fourth through hole are connected and communicated with each other, so that a demolding rod can pass through simultaneously.

6. The vertical mold for 10 kV lightning arrester according to claim 1, characterized in that The pouring port is provided at a position near the lower part of the front side of the cavity, and a runner for connecting the pouring port and a plurality of channels is provided in the cavity. The runner is a one-to-two, two-to-four runner.

7. The vertical mold for 10 kV lightning arrester according to claim 1, characterized in that, The holes on the upper template and the lower template are stepped holes, and the inserts are adapted to the shape of the stepped holes.

8. The vertical mold for the 10 kV lightning arrester according to claim 1, characterized in that, A frosted layer is provided on the inner surface of the channel of the cavity.

9. The vertical mold for 10 kV lightning arrester according to claim 1, characterized in that, Ejector plates are connected to both sides of the cavity for connecting the cavity to the upper hanging mold of the production equipment.

10. The 10 kV lightning arrester vertical mold according to claim 1, characterized in that The upper backing plate is threadedly connected to the upper template, and the lower backing plate is threadedly connected to the lower template. The mold is fixedly connected to the upper and lower hot plates of the equipment through the upper and lower backing plates.

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