Casting mold for shell products of automobile air conditioner compressor

Abstract

The utility model discloses a casting mould for automobile air conditioner compressor shell products, which comprises a mould core internally provided with a cavity, the mould core comprises an upper mould core and a lower mould core, the upper mould core and the lower mould core are respectively provided with transverse runner grooves which are symmetrically arranged up and down, and one side of the lower mould core close to the transverse runner grooves is fixedly connected with a sprue spreader. The lower portion of the sprue spreader is fixed to the side face of the lower mold core, the upper portion of the sprue spreader is of a conical structure with the diameter gradually reduced from bottom to top, a straight runner groove is formed in the side, close to the transverse runner, of the conical structure and extends from top to bottom, and the lower end of the straight runner groove communicates with the transverse runner. The upper portion in the sprue bush is a feeding port, the lower portion in the sprue bush is a conical hole assembled with the conical face of the sprue spreader in a matched mode, the tail end of a transverse runner groove of the upper mold core is an inclined face inclining downwards from the edge of the mold core to a cavity, and the tail end of a transverse runner groove of the lower mold core is an inclined face inclining upwards from the edge of the mold core to the cavity. And the position, close to the mold core cavity, of the inclined surface is a horizontally-arranged feeding hole.

Description

Technical Field

[0001] The utility model relates to a casting mold for automobile air-conditioning compressor casing products, belonging to the technical field of aluminum alloy casting molds. Background Art

[0002] Among the current aluminum alloy casting products, automobile air conditioning compressors have relatively high requirements for product air tightness, so they have relatively high requirements for pores. Among them, due to the special structure of housing products, the use of reasonable flow channel design and feeding methods in the mold making process is of great significance to reducing pore defects and improving casting quality and performance.

[0003] Automobile air conditioning compressor products have relatively high requirements for air holes. Part of the reason for the appearance of air holes in the product is due to the unreasonable design of the flow channel and feed of the mold. The pressure of the aluminum liquid will become smaller during the filling process, and the filling process is prone to abnormalities such as mixed flow and air entrainment of the aluminum liquid, thus causing local air hole problems. Therefore, it is necessary to design a reasonable flow channel and feed angle. Utility Model Content

[0004] The utility model aims to provide a casting mold for automobile air-conditioning compressor casing products, so as to solve the problem that the mold flow channel and feed design in the prior art are unreasonable and local pores are easy to appear.

[0005] The utility model adopts the following technical scheme: a casting mold for automobile air-conditioning compressor casing products, comprising a mold core with a mold cavity inside, the mold cavity matches the shape of the product, the mold core comprises an upper mold core and a lower mold core butted together, the upper mold core and the lower mold core are respectively provided with a cross-flow channel groove symmetrically arranged up and down, one end of the cross-flow channel groove is connected to the mold cavity, and the other end is located on one side of the mold core, the space in the cross-flow channel groove forms a cross-flow channel, a diverter cone is fixedly connected to one side of the mold core close to the cross-flow channel groove, the lower part of the diverter cone is fixed to the side of the lower mold core, the upper part of the diverter cone is a conical structure with a diameter gradually reduced from bottom to top, the A direct current channel is provided on one side of the conical structure close to the cross runner, the direct current channel extends from top to bottom and the lower end is connected with the cross runner, a gate sleeve is provided on the outside of the diverter cone, the upper part of the gate sleeve is a feed port, and the lower part is a conical hole that is assembled with the conical surface of the diverter cone, after the diverter cone is assembled to the conical hole, a direct current channel is formed in the space between the inner wall of the conical hole and the direct current channel groove, and the direct current channel is connected with the cross runner, the end of the cross runner groove of the upper mold core is a slope that slopes downward from the edge of the mold core to the cavity, and the end of the cross runner groove of the lower mold core is a slope that slopes upward from the edge of the mold core to the cavity, and the position of the slope close to the core cavity is a horizontally arranged feed port.

[0006] The position of the feed inlet close to the core cavity is provided with a material shortage prevention groove.

[0007] The height difference between the material shortage prevention groove and the feed port is 1-2mm.

[0008] The width of the inclined surface of the cross flow channel groove gradually increases from the edge of the mold core to the mold cavity.

[0009] The angle between the inclined plane and the horizontal plane is 45°.

[0010] The depth of the cross flow channel groove gradually decreases from the edge of the mold core to the mold cavity.

[0011] The average cross-sectional area of ​​the direct flow channel is greater than the maximum cross-sectional area of ​​the cross flow channel.

[0012] The thickness of the straight flow channel is greater than the thickness of the cross flow channel.

[0013] The length of the arc where the root of the straight flow channel is located is greater than 1 / 3 of the entire outer circle length of the bottom of the diverter cone.

[0014] The beneficial effects of the utility model are as follows: when the utility model is in use, the aluminum liquid enters the diverter cone from the feed port of the gate sleeve, enters the cross-flow channel groove on the mold core from the direct flow channel groove of the diverter cone, and then enters the mold cavity of the mold core. After the aluminum liquid is formed, it is demolded to form a casting. The casting forms a product blank at the mold cavity. The casting direct flow channel and the casting cross-flow channel are respectively formed at the positions of the direct flow channel and the cross-flow channel of the mold. The cross-flow channel is removed from the product blank to obtain the product blank. Since the end of the cross-flow channel is an inclined surface, the inclined surfaces of the upper and lower mold cores gradually approach each other, so the cross-sectional area of ​​the end of the cross-flow channel gradually decreases. Since the pressure of the aluminum liquid filling remains unchanged, the pressure gradually increases during the aluminum liquid filling process, ensuring that there is sufficient filling pressure during the aluminum liquid filling process and reducing the pressure relief problem; since the feed point is two symmetrical inclined surfaces, the aluminum liquid starts from the feed point and is filled synchronously to both sides. This method of center-divided feeding can reduce abnormalities such as mixed flow and air entrainment. Therefore, the flow channel of the utility model is reasonably designed, the feeding pressure of the aluminum liquid can be guaranteed, and the synchronous feeding on both sides can reduce the pore defects.

[0015] Preferably, when the aluminum liquid is fed, the material shortage prevention groove is filled, and finally a boss structure is formed on the product blank. Since the feeding position is connected to the product, the subsequent removal of the casting straight channel may cause material shortage at the connection position. Therefore, a material shortage prevention groove of about 1.5 mm is set on the mold to form a boss on the product blank to prevent the removal of the casting cross channel from affecting the product body, thereby avoiding damage to the product appearance.

[0016] Preferably, the depth of the cross-flow channel groove gradually decreases, so the cross-sectional area of ​​the cross-flow channel gradually decreases, ensuring that the pressure gradually increases during the aluminum liquid filling process, further reducing the pressure relief problem.

[0017] Preferably, the length of the arc section where the root of the straight channel is located is greater than 1 / 3 of the entire outer circle length of the bottom of the diverter cone. This is to ensure that the product has sufficient filling pressure and cross-sectional area, so that when the cross-sectional area decreases in the later stage, the pressure can be increased to fill the product cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a casting mold for a casing product of an automobile air-conditioning compressor according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A top view of

[0020] Figure 3 yes Figure 1 A partial enlarged view of the stereoscopic view of the middle and lower mold cores;

[0021] Figure 4 yes Figure 1 A partial enlarged view of

[0022] Figure 5 is a schematic diagram of the casting after demoulding;

[0023] Figure 6 yes Figure 5 Plan view of

[0024] Figure 7 This is a partial enlarged view of the casting at the feed port after demoulding;

[0025] Figure 8 yes Figure 5 Top view of the middle splitter cone.

[0026] In the figure: 1-mold core, 1.1-lower mold core, 1.2-mold cavity, 1.3-cross flow channel groove, 1.31-inclined surface, 1.32-feed port, 1.33-anti-shortage groove, 2-diverter cone, 2.1-straight flow channel groove, 3-gate sleeve, 3.1-feed port, 3.2-tapered hole, 4-casting after demolding, 4.1-product blank, 4.2-casting straight flow channel, 4.3-casting cross flow channel, 4.4-boss. DETAILED DESCRIPTION

[0027] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] A casting mold for a car air-conditioning compressor housing product according to an embodiment of the utility model is as follows Figures 1 to 4 As shown, the casting mold of the automobile air-conditioning compressor housing product of this embodiment includes a mold core 1 with a mold cavity 1.2 inside, and the mold cavity 1.2 is consistent with the shape of the product. The mold core 1 includes an upper mold core ( Figure 1The upper mold core and the lower mold core 1.1 are respectively provided with a transverse flow channel groove 1.3 symmetrically arranged up and down, one end of the transverse flow channel groove 1.3 is connected to the cavity 1.2, and the other end is located on one side of the mold core 1, and the space in the transverse flow channel groove 1.3 forms a transverse flow channel, and the mold core 1 is fixedly connected with a diverter cone 2 on one side close to the transverse flow channel groove 1.3, and the lower part of the diverter cone 2 is fixed to the side of the lower mold core, and the upper part of the diverter cone 2 is a conical structure with a diameter gradually decreasing from bottom to top, and a direct current channel groove 2.1 is provided on the side of the conical structure close to the transverse flow channel, and the direct current channel groove 2.1 extends from top to bottom and the lower end The diverter cone 2 is connected to the cross flow channel. The outside of the diverter cone 2 is provided with a gate sleeve 3. The upper part of the gate sleeve 3 is a feed port 3.1, and the lower part is a conical hole 3.2 that fits the conical surface of the diverter cone 2. After the diverter cone is assembled to the conical hole 3.2, the space between the inner wall of the conical hole 3.2 and the direct flow channel groove 2.1 forms a direct flow channel, and the direct flow channel is connected to the cross flow channel. The end of the cross flow channel groove of the upper mold core is a slope that slopes downward from the edge of the mold core to the cavity, and the end of the cross flow channel groove 1.2 of the lower mold core 1.1 is a slope 1.31 that slopes upward from the edge of the mold core to the cavity. The position of the slope close to the mold core cavity is a horizontally set feed port 1.32. The angle between the slope 1.31 and the horizontal plane is 45°. The width of the slope of the cross flow channel groove 1.3 gradually increases from the edge of the mold core 1 to the cavity 1.2.

[0029] The feed port 1.32 is provided with a material shortage prevention groove 1.33 at a position close to the mold cavity 1.2 of the mold core. The height difference between the material shortage prevention groove 1.33 and the feed port 1.32 is 1-2 mm. In this embodiment, the depth of the material shortage prevention groove 1.32 is 1.5 mm.

[0030] The depth of the cross-flow channel groove 1.3 gradually decreases from the edge of the mold core 1 to the mold cavity 1.2. The average cross-sectional area of ​​the direct flow channel is greater than the maximum cross-sectional area of ​​the cross-flow channel. The thickness of the direct flow channel is greater than the thickness of the cross-flow channel.

[0031] The length of the arc section where the root of the straight flow channel is located is greater than 1 / 3 of the entire outer circle length of the bottom of the splitter cone 2.

[0032] When the casting mold of the automobile air-conditioning compressor housing of this embodiment is used, the aluminum liquid enters the diverter cone from the feed port of the gate sleeve, enters the cross flow channel groove on the mold core from the direct flow channel groove of the diverter cone, and then enters the mold cavity of the mold core. After the aluminum liquid is formed, it is demolded. The casting 4 after demolding is as shown in FIG. Figures 5 and 6 As shown, the intersection of the casting cross flow channel 4.3 and the cavity is finally cut off to form the product blank 4.1.

[0033] In this embodiment, the thickness of the cross-flow channel gradually decreases, and the cross-sectional area of ​​the straight flow channel is larger than the maximum cross-sectional area of ​​the cross-flow channel. According to the pressure formula F=PS (where P is the pressure and S is the cross-sectional area), the initial casting pressure F is consistent, but the cross-sectional areas of the flow channels are inconsistent. According to P2 / P1=S1 / S2 (P2 is the pressure of the aluminum liquid in the straight flow channel, P1 is the pressure of the aluminum liquid in the cross-flow channel, S1 is the cross-sectional area of ​​the straight flow channel, and S2 is the cross-sectional area of ​​the cross-flow channel), as S2 gradually decreases, the pressure of P2 gradually increases, and the aluminum liquid is filled more powerfully. Therefore, the thickness of the straight flow channel is greater than the thickness of the cross-flow channel, and the cross-sectional area of ​​the aluminum liquid in the cross-flow channel gradually decreases, ensuring that there is sufficient filling pressure during the aluminum liquid filling process and reducing the pressure relief problem.

[0034] The cross-flow channel near the feed port uses a 45° slope, and the feed is divided into two parts at a 45° angle, so that the aluminum liquid starts from the feed point and is filled to both sides synchronously, reducing abnormalities such as mixed flow and air entrainment. If the feed is unreasonable, the aluminum liquid will collide with the mold cavity and draw the air in the cavity into the aluminum liquid, causing air entrainment and the aluminum liquid will not be smooth during the fusion process, resulting in mixed flow problems. The enlarged partial picture of the casting at the feed port after feeding is shown in the figure below. Figure 7 shown.

[0035] When the aluminum liquid is fed, it is filled in the anti-shortage groove, and finally a boss structure is formed on the product blank 4.1. Since the feeding position is connected to the product, the subsequent removal of the casting straight channel 4.2 may cause a shortage of material at the connection position. Therefore, a 1.5mm anti-shortage groove is set on the mold to form a boss 4.4 on the product blank to prevent the removal of the casting cross channel 4.3 from affecting the product body, thereby avoiding damage to the product appearance.

[0036] like Figure 8 As shown, the length of the entire circumference of the bottom of the diverter cone structure is about 251.3mm, and 1 / 3 of the length of the circumference is 83.8mm. In this embodiment, the length of the arc section where the root of the straight channel is located is 251.3-134.9=113.6mm>83.8mm. The length of the arc section where the root of the straight channel is located is greater than 1 / 3 of the entire outer circle length of the bottom of the diverter cone in order to ensure that the product has sufficient filling pressure and cross-sectional area, so that when the cross-sectional area decreases in the later stage, the pressure can be increased to fill the product cavity.

[0037] By machining a casing-type automobile air-conditioning compressor using this embodiment, this flow channel and feeding method can ensure smooth filling of molten aluminum, reduce porosity problems caused by abnormalities such as mixed flow and air entrainment, and thus improve production efficiency and product quality.

[0038] The above embodiments are preferred embodiments of the present invention. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of protection required by the present invention.

Claims

1. A casting mold for automobile air-conditioning compressor casing products, comprising a mold core with a mold cavity inside, the mold cavity matches the shape of the product, the mold core comprises an upper mold core and a lower mold core butted together, the upper mold core and the lower mold core are respectively provided with a cross-flow channel groove symmetrically arranged up and down, one end of the cross-flow channel groove is connected to the mold cavity, and the other end is located on one side of the mold core, and the space in the cross-flow channel groove forms a cross-flow channel, characterized in that: A diverter cone is fixedly connected to the side of the mold core close to the cross runner groove, and the lower part of the diverter cone is fixed to the side of the lower mold core. The upper part of the diverter cone is a conical structure with a diameter gradually decreasing from bottom to top. A direct current groove is provided on the side of the conical structure close to the cross runner, and the direct current groove extends from top to bottom and the lower end is connected with the cross runner. A gate sleeve is provided on the outside of the diverter cone, and the upper part of the gate sleeve is a feed port, and the lower part is a conical hole that is assembled with the conical surface of the diverter cone. After the diverter cone is assembled to the conical hole, a direct current channel is formed in the space between the inner wall of the conical hole and the direct current groove, and the direct current channel is connected with the cross runner. The end of the cross runner groove of the upper mold core is a slope that slopes downward from the edge of the mold core to the cavity, and the end of the cross runner groove of the lower mold core is a slope that slopes upward from the edge of the mold core to the cavity, and the position of the slope close to the core cavity is a horizontally set feed port.

2. The casting mold for automobile air-conditioning compressor housing products according to claim 1, characterized in that: The position of the feed inlet close to the core cavity is provided with a material shortage prevention groove.

3. The casting mold for automobile air-conditioning compressor housing products according to claim 2, characterized in that: The height difference between the anti-material shortage groove and the feed port is 1-2mm.

4. The casting mold for automobile air-conditioning compressor housing products according to claim 1, characterized in that: The width of the inclined surface of the cross flow channel groove gradually increases from the edge of the mold core to the mold cavity.

5. The casting mold for automobile air-conditioning compressor housing products according to claim 1, characterized in that: The angle between the inclined plane and the horizontal plane is 45°.

6. The casting mold for automobile air-conditioning compressor housing according to claim 1, characterized in that: The depth of the cross flow channel groove gradually decreases from the edge of the mold core to the mold cavity.

7. The casting mold for automobile air-conditioning compressor housing according to claim 6, characterized in that: The average cross-sectional area of ​​the direct flow channel is greater than the maximum cross-sectional area of ​​the cross flow channel.

8. The casting mold for automobile air-conditioning compressor housing products according to claim 1, characterized in that: The thickness of the straight flow channel is greater than the thickness of the cross flow channel.

9. The casting mold for automobile air-conditioning compressor housing products according to claim 1, characterized in that: The length of the arc where the root of the straight flow channel is located is greater than 1 / 3 of the entire outer circle length of the bottom of the diverter cone.

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