Casting mold for conductive shell of high-voltage switch

Abstract

The utility model discloses a casting mold for a conductive shell of a high-voltage switch. The casting mold comprises a lower mold, an upper mold arranged on the lower mold and a sand core arranged in the upper mold, the device is characterized in that the sand core is internally provided with a main runner, a plurality of branch runners connected with the main runner and a plurality of auxiliary runners for feeding the thin wall of the conductive shell; and an anti-deformation rib cavity corresponding to the auxiliary runner is arranged on the upper die. According to the utility model, the auxiliary flow channel is arranged at the thin-wall part of the conductive shell through the main flow channel, so that the thin-wall part of the conductive shell is convenient to form, and the conditions of cold shut and casting non-forming are prevented; the upper die is provided with the anti-deformation rib cavity, so that the thin wall part of the conductive shell can be locally thickened, the feeding distance can be prolonged, the quality and the qualification rate of a casting can be improved, and the situations that the casting is deformed when a runner is cleaned, wall breaking occurs seriously, and scrapping is caused are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molds, in particular to a casting mold for a conductive shell of a high-voltage switch. Background Art

[0002] Siemens high-voltage switchgear conductive housings are important components in high-voltage switchgear circuit breakers and are used in large quantities. These products are characterized by large size and thin walls, typically 5-6mm thick, making them large, thin-walled cylindrical parts. Existing technologies use a main flow channel to feed material into thin-walled cylindrical parts, but the branch flow channels are located at the thick end of the wall. This results in uneven feeding, easily leading to cold shuts and poor casting quality in the thin-walled areas. Furthermore, during later cleaning of the internal flow channel, the thin-walled areas are prone to deformation, and in severe cases, wall breakage can occur, resulting in scrap. Therefore, a casting mold for high-voltage switchgear conductive housings is proposed to improve the quality of castings. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems and to provide a casting mold for a conductive shell of a high-voltage switch.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a casting mold for a high-voltage switch conductive shell, comprising a lower mold, an upper mold installed on the lower mold, and a sand core installed in the upper mold; the sand core is characterized in that a main flow channel, a plurality of branch flow channels connected to the main flow channel, and a plurality of auxiliary flow channels for feeding material to the thin parts of the conductive shell wall are provided; an anti-deformation rib cavity is provided on the upper mold corresponding to the auxiliary flow channel.

[0005] Preferably, the auxiliary flow channel and the anti-deformation rib cavity are evenly arranged on the main flow channel and the upper mold along the circumference.

[0006] Preferably, the upper mold includes a first mold cavity block and a second mold cavity block assembled with the first mold cavity block.

[0007] Preferably, both the first mold cavity block and the second mold cavity block are provided with a mold cavity for molding the external shape of the conductive shell of the high-voltage switch.

[0008] Preferably, the lower mold is further provided with a liquid inlet communicating with the main flow channel in the sand core.

[0009] Preferably, the sand core is a structure formed inside the conductive shell of the high-voltage switch.

[0010] The beneficial effects of the utility model are as follows: auxiliary flow channels are provided at the thin wall portion of the conductive shell through the main flow channel, thereby facilitating the molding of the thin wall portion of the conductive shell and preventing the occurrence of cold shut and casting failure.

[0011] By setting up an anti-deformation rib cavity on the upper mold, the thin wall of the conductive shell can be locally thickened, the shrinkage compensation distance can be extended, the quality and pass rate of the casting can be improved, and deformation of the casting during cleaning of the flow channel can be prevented, and in severe cases, wall breakage can be prevented, resulting in scrap. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 It is a cross-sectional view of the utility model.

[0014] Figure 3 It is a schematic diagram of the sand core structure of the utility model.

[0015] Legend: 1. Lower mold; 101. Liquid inlet; 2. Upper mold; 201. Anti-deformation rib cavity; 202. First mold cavity block; 203. Second mold cavity block; 204. Cavity; 3. Main runner; 301. Branch runner; 302. Auxiliary runner. DETAILED DESCRIPTION

[0016] Next, we will further explain the casting mold of the high-voltage switch conductive housing described in the present invention with reference to the accompanying drawings.

[0017] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0018] See attached Figure 1-3 As shown, in this embodiment, a casting mold for a conductive shell of a high-voltage switch comprises a lower mold 1, an upper mold 2 installed on the lower mold 1, and a sand core installed in the upper mold 2; the characteristic is that the sand core is provided with a main channel 3, a plurality of branch channels 301 connected to the main channel 3, and a plurality of auxiliary channels 302 for feeding the thin wall of the conductive shell; an anti-deformation rib cavity 201 is provided on the upper mold 2 corresponding to the auxiliary channel 302; the auxiliary channel 302 is provided at the thin wall of the conductive shell through the main channel 3, so as to facilitate the molding of the thin wall of the conductive shell and prevent the occurrence of cold shut and casting failure; the anti-deformation rib cavity 201 is provided on the upper mold 2, so that the thin wall of the conductive shell can be locally thickened, the shrinkage compensation distance can be extended, the quality and pass rate of the casting can be improved, and deformation of the casting can be prevented when the flow channel is cleaned, and the wall can be broken in severe cases, resulting in scrap.

[0019] See attached Figure 2As shown, the auxiliary flow channel 302 and the anti-deformation rib cavity 201 are evenly arranged on the main channel 3 and the upper mold 2 according to the circumference; the auxiliary flow channel 302 is evenly arranged on the circumference of the thin wall of the conductive shell through the main channel 3, which facilitates the molding of the thin wall of the conductive shell and prevents the occurrence of cold shut and casting failure.

[0020] See attached Figure 1-2 As shown, the upper mold 2 includes a first mold cavity block 202 and a second mold cavity block 203 assembled with the first mold cavity block 202; the first mold cavity block 202 and the second mold cavity block 203 are both provided with a cavity 204 for molding the external shape of the high-voltage switch conductive shell.

[0021] See attached Figure 2 As shown, the lower mold 1 is further provided with a liquid inlet 101 communicating with the main flow channel 3 in the sand core; the sand core is a structure formed inside the conductive shell of the high-voltage switch.

[0022] In the present invention, the metal liquid in the crucible is transported to the casting mold by the pressure of compressed air, and the metal liquid flows to the main channel 3 through the liquid inlet 101, and then flows to the inside of the cavity 204 of the upper mold 2 through the branch channel 301 and the auxiliary channel 302. After molding, anti-deformation ribs formed by the anti-deformation rib cavity 201 will be formed on the outer surface of the conductive shell, which can locally thicken the thin parts of the conductive shell wall, extend the shrinkage compensation distance, improve the quality and pass rate of the casting, and prevent the casting from being deformed when cleaning the flow channel, and in severe cases, the wall is broken, resulting in scrapping. After the flow channels are cleaned, the cutting device is used to cut off the anti-deformation ribs, and the grinding device is used to grind them.

[0023] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A casting mold for a high-voltage switch conductive housing, comprising a lower mold (1), an upper mold (2) mounted on the lower mold (1), and a sand core mounted in the upper mold (2); wherein: The sand core is provided with a main flow channel (3), a plurality of branch flow channels (301) connected to the main flow channel (3), and a plurality of auxiliary flow channels (302) for feeding material to the thin portion of the conductive shell wall; and an anti-deformation rib cavity (201) is provided on the upper mold (2) corresponding to the auxiliary flow channels (302).

2. A casting mold for a high-voltage switch conductive housing according to claim 1, characterized in that: The auxiliary flow channel (302) and the anti-deformation rib cavity (201) are evenly arranged on the main flow channel (3) and the upper mold (2) in a circumferential manner.

3. A casting mold for a high-voltage switch conductive housing according to claim 2, characterized in that: The upper mold (2) comprises a first mold cavity block (202) and a second mold cavity block (203) assembled with the first mold cavity block (202).

4. A casting mold for a high-voltage switch conductive housing according to claim 3, characterized in that: The first mold cavity block (202) and the second mold cavity block (203) are both provided with a mold cavity (204) for molding the external shape of the high-voltage switch conductive housing.

5. The casting mold for a high-voltage switch conductive housing according to claim 1, characterized in that: The lower mold (1) is also provided with a liquid inlet (101) communicating with the main flow channel (3) in the sand core.

6. A casting mold for a high-voltage switch conductive housing according to claim 5, characterized in that: The sand core is a structure formed inside the conductive shell of the high-voltage switch.

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