Die without die closing seam after forming of lightning arrester jacket

Abstract

The utility model relates to the technical field of lightning arresters, in particular to a die without a die-closing seam after a lightning arrester jacket is formed, which comprises an upper die and a lower die, the upper die and the lower die are attached to form a concave-convex matched die-closing line, and matched die cavities are respectively arranged in the upper die and the lower die. A plurality of protruding blocks are arranged on the edge of a die cavity of the upper die, a plurality of grooves matched with the protruding blocks are formed in the edge of a die cavity of the lower die, and the two ends of the protruding blocks and the two ends of the grooves are provided with matching faces respectively. And the silicon rubber jacket is easy to ablate.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester technology, specifically a mold that has no seam after the surge arrester jacket is formed. Background Technology

[0002] The surge arrester jacket is made of silicone rubber vulcanized in a mold. The parting line is necessary, and the height of the parting line protrusion can be controlled to a maximum of 0.3mm. If the flatness requirement cannot be met, the jacket edge will not be smooth. In a salt spray environment, the surge arrester is prone to silicone rubber jacket ablation. The ablation is concentrated at the mold joint of the surge arrester. Repairing the mold joint of the surge arrester to make it flat and applying silicone oil to make it smooth, the ablation still exists. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a mold without gaps after the surge arrester jacket is formed. This effectively solves the problems of uneven trimming of the jacket and the easy burning of the silicone rubber jacket in salt spray environments.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A mold for a surge arrester jacket without a seam after molding includes an upper mold and a lower mold. The upper mold and the lower mold are fitted together to form a concave-convex fitting mold line. The upper mold and the lower mold are respectively provided with matching mold cavities. The edge of the mold cavity of the upper mold is provided with a plurality of protrusions, and the edge of the mold cavity of the lower mold is provided with a plurality of grooves that match the protrusions. The two ends of the protrusions and the grooves are respectively provided with mating surfaces.

[0006] Preferably, the mating surfaces are set at a mating angle of 30° with the horizontal planes of the upper and lower molds, respectively, and the mating surfaces at both ends of the protrusion can be fitted and matched with the mating surfaces at both ends of the groove.

[0007] Preferably, the grooves at both ends of the edge of the lower mold cavity are symmetrically arranged, and the grooves are modeled the same as the protrusions.

[0008] This utility model has a novel structure, ingenious design, and is simple and convenient to operate. Compared with the prior art, it has the following advantages:

[0009] 1. By changing the shape of the mold closing groove, the thickness of the mold closing seam is effectively reduced, eliminating the difficulty of trimming for workers.

[0010] 2. When using this mold design during product vulcanization, the silicone rubber can be concentrated in the mold cavity and is less likely to be squeezed out of the mold cavity. This increases the density of the vulcanized silicone rubber, reduces the loss of silicone rubber material, and improves material utilization.

[0011] 3. This fitting mold design ensures accurate positioning during mold closing, preventing product defects caused by misalignment of the upper and lower molds and improving the product qualification rate. Attached Figure Description

[0012] Figure 1 This is the first axonometric drawing of this utility model;

[0013] Figure 2 This is the second axonometric drawing of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the lower mold of this utility model;

[0015] The numbers in the diagram are: 1. Upper mold; 2. Lower mold; 3. convex inclined block; 4. concave inclined block; 5. Mold cavity; 6. Parting line; 7. Mating surface. Detailed Implementation

[0016] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figure 1-3 As shown, a mold for a surge arrester jacket without a seam after molding includes an upper mold 1 and a lower mold 2. The upper mold 1 and the lower mold 2 are fitted together to form a concave-convex fitting mold line 6. The upper mold 1 and the lower mold 2 are respectively provided with matching mold cavities 5. The edge of the mold cavity 5 of the upper mold 1 is provided with a plurality of protrusions 3. The edge of the mold cavity 5 of the lower mold 2 is provided with a plurality of grooves 4 that match the protrusions 3. The two ends of the protrusions 3 and the grooves 4 are respectively provided with mating surfaces 7.

[0018] In use, the upper mold 1 and the lower mold 2 are closed. During the closing process, the protrusion 3 at the edge of the cavity 5 of the upper mold 1 fits into the groove 4 on the lower mold 2. At the same time, the mating surfaces 7 at both ends of the protrusion 3 and the groove 4 are fitted together. The fitting of the protrusion 3 and the groove 4 is used to position the cavity 5 of the upper mold 1 and the lower mold 2, which can effectively prevent product defects caused by misalignment of the upper mold 1 and the lower mold 2, and improve the product qualification rate. After the upper mold 1 and the lower mold 2 are fitted together, a concave-convex fitting mold line 6 is formed. Although a concave-convex line is formed at the mold line 6, there are no protruding edges, which effectively reduces the thickness of the mold gap and eliminates the difficulty of trimming by workers. Moreover, this fitting method can ensure that the silicone rubber is concentrated in the cavity 5 and is not easily squeezed out of the cavity 5, which increases the density of the vulcanized silicone rubber and reduces the loss of silicone rubber material, thereby improving the material utilization rate.

[0019] The mating surfaces 7 are respectively set at a mating angle of 30° with the horizontal planes of the upper mold 1 and the lower mold 2. The mating surfaces 7 at both ends of the protrusion 3 can be fitted and matched with the mating surfaces 7 at both ends of the groove 4.

[0020] like Figure 2 As shown, by forming a fitting mold groove, a concave inclined surface with a lower fitting angle of 30° is set at the edge of the mold cavity 5 of the lower mold 2, and a convex inclined surface with an upper fitting angle of 30° is set at the edge of the mold cavity 5 of the upper mold 1, the upper mold 1 and the lower mold 2 are tightly joined together. After the lower mold 2 and the upper mold 1 are joined, the mold parting line 6 formed is flat and there are no protruding flashes.

[0021] The grooves 4 at both ends of the edge of the cavity 5 of the lower mold 2 are symmetrically arranged, and the model of the grooves 4 is the same as that of the protrusions 3.

[0022] like Figure 3 As shown, the protrusions 3 at the edge of the upper mold cavity 5 are vertically inserted into the grooves 4 at both ends of the edge of the lower mold cavity 5, ensuring that the upper mold 1 and the lower mold 2 are tightly joined.

[0023] The working process of this utility model is as follows: When in use, the upper mold 1 and the lower mold 2 are closed. During the closing process, the protrusion 3 at the edge of the cavity 5 of the upper mold 1 fits into the groove 4 on the lower mold 2. At the same time, the mating surfaces 7 at both ends of the protrusion 3 and the groove 4 fit together, forming a mating mold closing groove. A concave inclined surface with a lower mating angle of 30° is set at the edge of the cavity 5 of the lower mold 2, and a convex inclined surface with an upper mating angle of 30° is set at the edge of the cavity 5 of the upper mold 1. The upper mold 1 and the lower mold 2 are tightly combined. After the lower mold 2 and the upper mold 1 are combined, the mold closing line 6 formed is flat and without protrusions. When edge defects occur, the matching of protrusions 3 and grooves 4 is used to position the mold cavity 5 of the upper mold 1 and the lower mold 2. This effectively prevents product defects caused by misalignment of the upper mold 1 and the lower mold 2, improving the product qualification rate. After the upper mold 1 and the lower mold 2 are fitted together, they form a concave-convex fitting mold line 6. Although a concave-convex line is formed at the mold line 6, there are no protruding edges, which effectively reduces the thickness of the mold gap and eliminates the difficulty of trimming for workers. Moreover, this fitting method ensures that the silicone rubber is concentrated in the mold cavity 5 and is not easily squeezed out of the mold cavity 5. This increases the density of the vulcanized silicone rubber, reduces the loss of silicone rubber material, and improves the material utilization rate.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A mold for forming a surge arrester jacket without a seam after molding, comprising an upper mold (1) and a lower mold (2), characterized in that: After the upper mold (1) and the lower mold (2) are fitted together, they form a mold line (6) with a concave-convex fit. The upper mold (1) and the lower mold (2) are respectively provided with matching mold cavities (5). Several protrusions (3) are respectively provided at the edge of the mold cavity (5) of the upper mold (1). Several grooves (4) matching the protrusions (3) are respectively provided at the edge of the mold cavity (5) of the lower mold (2). The two ends of the protrusions (3) and the grooves (4) are respectively provided with mating surfaces (7).

2. The mold for forming a surge arrester outer casing without a seam as described in claim 1, characterized in that: The mating surfaces (7) are respectively set at a mating angle of (30)° with the horizontal planes of the upper mold (1) and the lower mold (2). The mating surfaces (7) at both ends of the protrusion (3) can be fitted and matched with the mating surfaces (7) at both ends of the groove (4).

3. The mold for forming a surge arrester jacket without a seam after molding, as described in claim 1, is characterized in that: The grooves (4) at both ends of the edge position of the cavity (5) of the lower mold (2) are symmetrically arranged, and the model of the grooves (4) is the same as that of the protrusions (3).

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