Casting mold for motor shell of refrigeration compressor

Abstract

The utility model discloses a casting mold for a motor shell of a refrigeration compressor. The casting mold comprises a lower mold, an upper mold spliced with the lower mold, and a sand core arranged in the lower mold, the sand core structure is characterized in that the sand core comprises a first sand core and a second sand core connected with the first sand core; and the first sand core is provided with an inner runner for feeding from the inner wall of the motor shell to improve the casting quality of the motor shell and an inner gate connected with the inner runner. The sand core is formed by splicing the first sand core and the second sand core, so that the processing difficulty of the sand core is reduced, and the production efficiency is improved; the inner flow gate and the inner flow gate are arranged on the first sand core, inner wall feeding is conducted on the thick wall position of the motor shell, shrinkage cavities are prevented from being generated in the thick wall position during casting, and therefore the casting quality is improved, and the rejection rate of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molds, in particular to a casting mold for a refrigeration compressor motor housing. Background Art

[0002] Marine refrigeration compressor motor castings are core components of a ship's refrigeration system. Their quality and performance are directly related to the ship's refrigeration and freshness, as well as the crew's quality of life. The compressor motor housing is typically cast using a mold at low pressure. In existing low-pressure casting techniques, the mold is only equipped with a main channel and a gate connected to the main channel. This method only allows external feeding of the motor housing. This can easily lead to shrinkage cavities during casting, making it impossible to meet the later price requirements and increasing the scrap rate of the casting. Therefore, a refrigeration compressor motor housing casting mold is proposed that can reduce this scrap rate. 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 refrigeration compressor motor housing.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a refrigeration compressor motor housing casting mold, comprising a lower mold, an upper mold assembled with the lower mold, a sand core installed in the lower mold and a slider installed on the upper mold; the characteristic is that the sand core comprises a first sand core and a second sand core connected to the first sand core; the first sand core is provided with an inner flow channel for feeding from the inner wall of the motor housing to improve the casting quality of the motor housing, and an inner gate connected to the inner flow channel.

[0005] Preferably, a connecting boss is provided on the second sand core on the lower mold; and a docking groove adapted to the connecting boss is provided on the first sand core.

[0006] Preferably, the lower mold is provided with a positioning installation groove for facilitating the installation of the second sand core and the first sand core.

[0007] Preferably, the upper mold is composed of two upper modules assembled on the lower mold; the upper mold is also provided with a main runner and a gate connected to the main runner.

[0008] Preferably, the lower mold is further provided with liquid inlets corresponding to the main flow channel and the inner flow channel respectively.

[0009] Preferably, it further comprises a plurality of wear-resistant blocks mounted on the lower die; the wear-resistant blocks are provided with guide bosses for guiding the sliding of the upper die.

[0010] Preferably, the upper die is provided with a guide groove adapted to the guide boss.

[0011] The beneficial effects of the utility model are as follows: the sand core is assembled from the first sand core and the second sand core, which reduces the difficulty of processing the sand core and improves the production efficiency;

[0012] By arranging inner circulation and inner gate on the first sand core, the inner wall of the motor housing is fed into the thick part to prevent shrinkage holes from being generated during casting at the thick part, thereby improving the casting quality and reducing the scrap rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 It is a cross-sectional view of the present utility model.

[0015] Figure 3 It is a partial structural diagram of the utility model.

[0016] Figure 4 It is a partial structural diagram of the utility model.

[0017] Legend: 1. Lower mold; 101. Positioning and mounting groove; 102. Liquid inlet; 2. Upper mold; 201. Main flow channel; 202. Inlet gate; 3. First sand core; 301. Second sand core; 302. Inner flow channel; 303. Inner gate; 304. Connecting boss; 305. Docking groove; 4. Slider. DETAILED DESCRIPTION

[0018] Next, we will further explain the casting mold for the refrigeration compressor motor housing according to the present invention with reference to the accompanying drawings.

[0019] 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.

[0020] See attached Figure 1-3As shown, in this embodiment, a casting mold for a refrigeration compressor motor housing includes a lower mold 1, an upper mold 2 assembled with the lower mold 1, a sand core installed in the lower mold 1, and a slider 4 installed on the upper mold 2; its characteristic is that the sand core includes a first sand core 3 and a second sand core 301 connected to the first sand core 3; the first sand core 3 is provided with an inner flow channel 302 for feeding from the inner wall of the motor housing to improve the casting quality of the motor housing, and an inner gate 303 connected to the inner flow channel 302; the sand core is assembled from the first sand core 3 and the second sand core 301, which reduces the processing difficulty of the sand core and improves the production efficiency; by arranging the inner flow and the inner gate 303 on the first sand core 3, the inner wall of the motor housing is fed to prevent the generation of shrinkage holes during casting at the thick wall, thereby improving the casting quality and reducing the scrap rate of the product.

[0021] See attached Figure 2-4 As shown, the second sand core 301 on the lower mold 1 is provided with a connecting boss 304; the first sand core 3 is provided with a docking groove 305 adapted to the connecting boss 304; the lower mold 1 is provided with a positioning installation groove 101 for facilitating the installation of the second sand core 301 and the first sand core 3; by installing one end of the second sand core 301 and the first sand core 3 in the corresponding positioning installation groove 101 on the lower mold 1, and at the same time installing the connecting boss 304 of the second sand core 301 into the docking groove 305 of the first sand core 3, the second sand core 301 and the first sand core 3 are positioned and installed on the lower mold 1, thereby facilitating the installation of the second sand core 301 and the first sand core 3.

[0022] See attached Figure 2 As shown, the upper mold 2 is composed of two upper mold pieces assembled on the lower mold 1; the upper mold 2 is also provided with a main channel 201 and an inlet gate 202 connected to the main channel 201; the lower mold 1 is also provided with a liquid inlet 102 corresponding to the main channel 201 and the inner channel 302 respectively.

[0023] In the present invention, when the mold is produced, the metal liquid in the crucible is transported to the corresponding liquid inlet 102 of the lower mold 1 by using the pressure of the gas, and then flows into the main channel 201 and the inner flow channel 302 through the liquid inlet 102. The metal liquid in the main channel 201 flows into the cavity of the upper mold 2 through the inlet gate 202, and the metal liquid in the inner flow channel 302 is fed into the inside of the thick wall of the motor housing through the inner gate 303, thereby preventing the motor housing casting from generating shrinkage holes in the wall thickness after shrinkage, thereby reducing the scrap rate of the motor housing casting.

[0024] 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 refrigeration compressor motor housing casting mold, comprising a lower mold (1), an upper mold (2) assembled with the lower mold (1), a sand core installed in the lower mold (1), and a slider (4) installed on the upper mold (2); wherein the mold is characterized by: The sand core comprises a first sand core (3) and a second sand core (301) connected to the first sand core (3); the first sand core (3) is provided with an inner flow channel (302) for feeding material from the inner wall of the motor housing to improve the casting quality of the motor housing, and an inner gate (303) connected to the inner flow channel (302).

2. The refrigeration compressor motor housing casting mold according to claim 1, characterized in that: A connecting boss (304) is provided on the second sand core (301) on the lower mold (1); and a docking groove (305) adapted to the connecting boss (304) is provided on the first sand core (3).

3. The refrigeration compressor motor housing casting mold according to claim 2, characterized in that: The lower mold (1) is provided with a positioning installation groove (101) for facilitating the installation of the second sand core (301) and the first sand core (3).

4. The refrigeration compressor motor housing casting mold according to claim 1, characterized in that: The upper mold (2) is composed of two upper mold (2) blocks assembled on the lower mold (1); the upper mold (2) is also provided with a main flow channel (201) and a gate (202) connected to the main flow channel (201).

5. The refrigeration compressor motor housing casting mold according to claim 4, characterized in that: The lower mold (1) is also provided with liquid inlets (102) corresponding to the main flow channel (201) and the inner flow channel (302), respectively.

Images