Casting device for compressor box body casting

Abstract

The utility model discloses a casting device of a compressor box body casting, and aims to provide a casting device which is favorable for improving the flowing stability of molten metal in a mold cavity and reducing molten iron splashing and turbulent flow so as to reduce the risk of gas entrainment and oxide inclusion; and the casting device of the compressor box body casting is beneficial to slag floating and sequential solidification so as to reduce the shrinkage porosity defect. The mold comprises a mold cavity and a plurality of sand cores arranged in the mold cavity, and the opening end of each cooling cavity is arranged downwards in the mold cavity; and the outlet end of each bottom pouring pipeline is communicated with the bottom of the cavity, each cooling cavity at least corresponds to two bottom pouring pipelines, and the outlet ends of the bottom pouring pipelines corresponding to the cooling cavities are sequentially distributed along the edges of the opening ends of the cooling cavities.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, specifically to a casting device for a compressor housing casting. Background Technology

[0002] Currently, compressor housings are generally formed by mold casting. Compressor housing castings have complex structures with uneven wall thickness, multiple cooling chambers, and multiple volutes, and the casting quality requirements for compressor housing castings are high. For example, Chinese Patent Publication No. CN217095572U, entitled "A Precision Closed Molding Mold for Compressor Housing Castings," discloses a precision closed molding mold for compressor housing castings.

[0003] The structural characteristics of compressor housing castings currently present the following difficulties in casting: due to the dispersed heat points of the product, feeding the casting is difficult and shrinkage defects are prone to occur; the product has multiple cooling chambers and multiple spiral channels, making feeding difficult and shrinkage defects are prone to occur; due to the complex structure, there are many casting sand cores and chills, and the flow of molten metal in the cavity is not stable, which easily produces molten iron splashing and turbulence, and casting defects such as sand holes, cold shuts, slag inclusions, and sand flushing during pouring are prone to occur. Utility Model Content

[0004] The purpose of this invention is to provide a casting device for compressor housing castings that is beneficial for improving the smoothness of molten metal flow in the mold cavity, reducing molten iron splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions; and also beneficial for slag flotation and sequential solidification to reduce shrinkage defects.

[0005] The technical solution of this utility model is:

[0006] A casting apparatus for a compressor housing casting, the compressor housing casting including at least two cooling chambers having open ends, comprising:

[0007] The mold includes a cavity and several sand cores disposed within the cavity, with the opening ends of each cooling chamber arranged downwards within the cavity;

[0008] Several bottom-injection pipes are provided, with the outlet end of each pipe connected to the bottom of the mold cavity. Each cooling chamber corresponds to at least two bottom-injection pipes, and the outlet ends of these pipes are sequentially distributed along the edge of the cooling chamber's opening. In this casting apparatus, the cooling chambers of the compressor housing casting are arranged downwards within the mold cavity. Molten metal is injected into the bottom of the cavity through the bottom-injection pipes, filling the cavity from bottom to top. Simultaneously, each cooling chamber corresponds to at least two bottom-injection pipes, with the outlet ends of these pipes sequentially distributed along the edge of the cooling chamber's opening. This effectively improves the stability of the molten metal flow within the mold cavity, reduces splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions, and effectively minimizing casting defects such as sand holes, cold shuts, slag inclusions, and sand flushing during pouring. It also facilitates slag flotation and sequential solidification, reducing shrinkage defects and thus improving the quality of the compressor housing casting.

[0009] Preferably, the compressor housing casting also includes a first worm gear, one end of which is arranged downward in the cavity. The first worm gear corresponds to at least two bottom injection pipes, and the outlet ends of each bottom injection pipe corresponding to the first worm gear are distributed sequentially along the edge of one end of the first worm gear.

[0010] In this design, the casting apparatus arranges one end of the first worm gear of the compressor housing casting downwards in the mold cavity; the first worm gear corresponds to at least two bottom pouring pipes; at the same time, the outlet ends of each bottom pouring pipe corresponding to the first worm gear are distributed sequentially along the edge of one end of the first worm gear; thus, it is beneficial to further improve the stability of the molten metal flow in the mold cavity, reduce molten iron splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions, and effectively reducing casting defects such as sand holes, cold shuts, slag inclusions, and sand flushing during pouring.

[0011] Preferably, the system also includes a connecting pipe. The compressor housing casting further includes a second volute, one end of which is arranged downwards in the cavity. Both ends of the connecting pipe are connected to the bottom of the cavity. One end of the connecting pipe is near the outlet of one of the cooling chambers, and the other end is near one end of the second volute. In this way, the connecting pipe can improve the uniformity of molten metal distribution and the smoothness of flow within the cavity, reducing molten iron splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions.

[0012] As a preferred option, the first worm gear corresponds to two bottom injection pipes.

[0013] Preferably, one of the cooling chambers corresponds to four bottom injection pipes.

[0014] Preferably, one of the cooling chambers corresponds to three bottom injection pipes.

[0015] Preferably, the system also includes a main pipe and a distribution box. The main pipe is connected to the distribution box, which is located above the outlet of each bottom-pouring pipe. The inlet of each bottom-pouring pipe is connected to the distribution box. In the actual casting process, the molten metal flows into the distribution box through the main pipe and then into each bottom-pouring pipe, thereby improving the uniformity of the molten metal flow in each bottom-pouring pipe and further improving the uniformity of the distribution and the stability of the flow of the molten metal in the mold cavity.

[0016] Preferably, the distribution box includes several interconnected distribution chambers, each corresponding to at least one bottom injection pipe, with the inlet of the bottom injection pipe connected to the corresponding distribution chamber. In this way, molten metal flows into the distribution box through the main pipe, is distributed to each distribution chamber through the distribution box, and then flows into the corresponding bottom injection pipe, further improving the uniformity of molten metal flow in each bottom injection pipe, thereby further improving the uniformity of molten metal distribution and the smoothness of flow within the mold cavity.

[0017] Preferably, there are an even number of flow distribution chambers, symmetrically distributed on both sides of the main pipe. This allows the molten metal to flow into the flow distribution chambers through the main pipe, further improving the uniformity of molten metal distribution within each flow distribution chamber, and consequently, further improving the uniformity of molten metal flow rate in each bottom injection pipe.

[0018] Preferably, the bottom injection pipe is a ceramic pipe.

[0019] The beneficial effects of this invention are: it helps to improve the stability of molten metal flow in the mold cavity, reduce molten iron splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions; it also helps slag float and sequential solidification, thereby reducing shrinkage defects and improving the quality of compressor housing castings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a casting device for a compressor housing casting according to the present invention (the mold and sand core are not shown in the figure).

[0021] Figure 2 This is a bottom view of a casting device for a compressor housing casting according to this utility model.

[0022] In the picture:

[0023] Bottom injection pipe 1;

[0024] Diverter box 2, diverter chamber 2.1;

[0025] Main pipe 3;

[0026] Compressor housing casting 4, cooling chamber 4.1, first volute 4.2, second volute 4.3. Detailed Implementation

[0027] Specific Implementation Example 1, such as Figure 1 , Figure 2 As shown, a casting apparatus for a compressor housing casting 4 is disclosed. The compressor housing casting 4 includes at least two cooling chambers 4.1 with open ends. In this embodiment, the compressor housing casting 4 includes two cooling chambers 4.1 with open ends. It should be noted that the compressor housing casting 4 may also include three cooling chambers 4.1 with open ends. In this embodiment, one end of the cooling chamber 4.1 is open (i.e., the open end of the cooling chamber 4.1), and the other end of the cooling chamber 4.1 is closed.

[0028] A casting apparatus for a compressor housing includes a mold and several bottom-fill pipes 1. The mold includes a cavity and several sand cores (not shown in the figure) disposed within the cavity. In this embodiment, the bottom-fill pipes 1 are ceramic pipes. It should be noted that the bottom-fill pipes 1 can also be made of other materials. The mold includes an upper mold and a lower mold, with the cavity formed between the upper and lower molds. The open ends of each cooling chamber 4.1 are arranged downwards within the cavity. The outlet ends of each bottom-fill pipe 1 are connected to the bottom of the cavity. Each cooling chamber 4.1 corresponds to at least two bottom-fill pipes 1, and the outlet ends of each bottom-fill pipe 1 corresponding to the cooling chamber 4.1 are sequentially distributed along the edge of the open end of the cooling chamber 4.1.

[0029] In this embodiment, the casting apparatus arranges each cooling chamber 4.1 of the compressor housing casting 4 downwards in the mold cavity; molten metal is injected into the bottom of the mold cavity through bottom-pouring pipes 1, so that the molten metal fills the mold cavity from bottom to top; at the same time, each cooling chamber 4.1 corresponds to at least two bottom-pouring pipes 1, and the outlet ends of each bottom-pouring pipe 1 corresponding to the cooling chamber 4.1 are distributed sequentially along the edge of the opening end of the cooling chamber 4.1; in this way, the flow stability of molten metal in the mold cavity can be effectively improved, molten iron splashing and turbulence can be reduced, thereby reducing the risk of gas entrapment and oxidation inclusions, and effectively reducing casting defects such as sand holes, cold shuts, slag inclusions, and sand flushing during pouring; at the same time, it is conducive to slag flotation and sequential solidification, so as to reduce shrinkage defects, thereby improving the quality of the compressor housing casting 4.

[0030] Specific embodiment two, such as Figure 1 , Figure 2 As shown, a casting apparatus for a compressor housing casting 4 is disclosed. The compressor housing casting 4 includes a first volute 4.2 and at least two cooling chambers 4.1 with open ends. In this embodiment, the compressor housing casting 4 includes two cooling chambers 4.1 with open ends. It should be noted that the compressor housing casting 4 may also include three cooling chambers 4.1 with open ends. In this embodiment, one end of the cooling chamber 4.1 is open (i.e., the open end of the cooling chamber 4.1), and the other end of the cooling chamber 4.1 is closed.

[0031] A casting apparatus for a compressor housing includes a mold and several bottom-fill pipes 1. The mold includes a cavity and several sand cores (not shown in the figure) disposed within the cavity. In this embodiment, the bottom-fill pipes 1 are ceramic pipes. It should be noted that the bottom-fill pipes 1 can also be made of pipes made of other materials. The mold includes an upper mold and a lower mold, and the cavity is formed between the upper mold and the lower mold.

[0032] The open ends of each cooling chamber 4.1 are arranged downwards within the mold cavity. The outlet ends of each bottom-filling pipe 1 are connected to the bottom of the mold cavity. Each cooling chamber 4.1 corresponds to at least two bottom-filling pipes 1, and the outlet ends of each bottom-filling pipe 1 corresponding to the cooling chamber 4.1 are distributed sequentially along the edge of the open end of the cooling chamber 4.1. In this embodiment, one cooling chamber 4.1 corresponds to four bottom-filling pipes 1, and the other cooling chamber 4.1 corresponds to three bottom-filling pipes 1. It should be noted that the number of bottom-filling pipes 1 corresponding to each cooling chamber 4.1 can be set as needed; for example, one cooling chamber 4.1 may correspond to 2-6 bottom-filling pipes 1, and the other cooling chamber 4.1 may correspond to 2-6 bottom-filling pipes 1.

[0033] One end of the first volute 4.2 is arranged downwards in the cavity. The first volute 4.2 corresponds to at least two bottom injection pipes 1. The outlet ends of each bottom injection pipe 1 corresponding to the first volute 4.2 are distributed sequentially along the edge of one end of the first volute 4.2. In this embodiment, the first volute 4.2 corresponds to two bottom injection pipes 1. It should be noted that the number of bottom injection pipes 1 corresponding to the first volute 4.2 can be set as needed, for example, the first volute 4.2 corresponds to 2-6 bottom injection pipes.

[0034] In this embodiment, the casting apparatus arranges the cooling chambers 4.1 of the compressor housing casting 4 downwards in the mold cavity, and one end of the first volute 4.2 downwards in the mold cavity. Molten metal is injected into the bottom of the mold cavity through bottom-pouring pipes 1, allowing the molten metal to fill the cavity from bottom to top. Simultaneously, each cooling chamber 4.1 corresponds to at least two bottom-pouring pipes 1, and the outlet ends of each bottom-pouring pipe 1 corresponding to the cooling chamber 4.1 are sequentially distributed along the edge of the opening end of the cooling chamber 4.1. The first volute 4.2 corresponds to at least two bottom-pouring pipes 1, and the outlet ends of each bottom-pouring pipe 1 corresponding to the first volute 4.2 are sequentially distributed along the edge of one end of the first volute 4.2. This effectively improves the stability of the molten metal flow in the mold cavity, reduces molten iron splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions, and effectively reducing casting defects such as sand holes, cold shuts, slag inclusions, and sand flushing during pouring. It also facilitates slag flotation and sequential solidification, reducing shrinkage defects, thereby improving the quality of the compressor housing casting 4.

[0035] Specific embodiment three, such as Figure 1 , Figure 2As shown, a casting apparatus for a compressor housing casting 4 is disclosed. The compressor housing casting 4 includes a first volute 4.2, a second volute 4.3, and at least two cooling chambers 4.1 with open ends. In this embodiment, the compressor housing casting 4 includes two cooling chambers 4.1 with open ends. It should be noted that the compressor housing casting 4 may also include three cooling chambers 4.1 with open ends. In this embodiment, one end of the cooling chamber 4.1 is open (i.e., the open end of the cooling chamber 4.1), and the other end of the cooling chamber 4.1 is closed.

[0036] A casting apparatus for a compressor housing includes a mold, a connecting pipe 5, and several bottom-fill pipes 1. The mold includes a cavity and several sand cores (not shown in the figure) disposed within the cavity. In this embodiment, the bottom-fill pipes 1 are ceramic pipes. It should be noted that the bottom-fill pipes 1 can also be made of pipes made of other materials.

[0037] The open ends of each cooling chamber 4.1 are arranged downwards within the mold cavity. The outlet ends of each bottom-filling pipe 1 are connected to the bottom of the mold cavity. Each cooling chamber 4.1 corresponds to at least two bottom-filling pipes 1, and the outlet ends of each bottom-filling pipe 1 corresponding to the cooling chamber 4.1 are distributed sequentially along the edge of the open end of the cooling chamber 4.1. In this embodiment, one cooling chamber 4.1 corresponds to four bottom-filling pipes 1, and the other cooling chamber 4.1 corresponds to three bottom-filling pipes 1. It should be noted that the number of bottom-filling pipes 1 corresponding to each cooling chamber 4.1 can be set as needed; for example, one cooling chamber 4.1 may correspond to 2-6 bottom-filling pipes 1, and the other cooling chamber 4.1 may correspond to 2-6 bottom-filling pipes 1.

[0038] One end of the first volute 4.2 is arranged downwards in the cavity. The first volute 4.2 corresponds to at least two bottom injection pipes 1. The outlet ends of each bottom injection pipe 1 corresponding to the first volute 4.2 are distributed sequentially along the edge of one end of the first volute 4.2. In this embodiment, the first volute 4.2 corresponds to two bottom injection pipes 1. It should be noted that the number of bottom injection pipes 1 corresponding to the first volute 4.2 can be set as needed, for example, the first volute 4.2 corresponds to 2-6 bottom injection pipes.

[0039] One end of the second volute 4.3 is arranged downwards in the cavity. Both ends of the connecting pipe 5 are connected to the bottom of the cavity. One end of the connecting pipe 5 is close to the outlet end of one of the cooling chambers 4.1, and the other end of the connecting pipe 5 is close to one end of the second volute 4.3.

[0040] In this embodiment, the casting apparatus arranges the cooling chambers 4.1 of the compressor housing casting 4 downwards in the mold cavity, and one end of the first volute 4.2 downwards in the mold cavity. Molten metal is injected into the bottom of the mold cavity through bottom-pouring pipes 1, allowing the molten metal to fill the cavity from bottom to top. Simultaneously, each cooling chamber 4.1 corresponds to at least two bottom-pouring pipes 1, and the outlet ends of each bottom-pouring pipe 1 corresponding to the cooling chamber 4.1 are sequentially distributed along the edge of the opening end of the cooling chamber 4.1. The first volute 4.2 corresponds to at least two bottom-pouring pipes 1, and the outlet ends of each bottom-pouring pipe 1 corresponding to the first volute 4.2 are sequentially distributed along the edge of one end of the first volute 4.2. This effectively improves the stability of the molten metal flow in the mold cavity, reduces molten iron splashing and turbulence, thereby reducing the risk of gas entrapment and oxidation inclusions, and effectively reducing casting defects such as sand holes, cold shuts, slag inclusions, and sand flushing during pouring. It also facilitates slag flotation and sequential solidification, reducing shrinkage defects, thereby improving the quality of the compressor housing casting 4.

[0041] In this fourth specific embodiment, the remaining structure is the same as in the first, second, or third specific embodiment, except that...

[0042] like Figure 1 , Figure 2 As shown, a casting apparatus for a compressor housing casting further includes a main pipe 3 and a distribution box 2. The main pipe 3 is connected to the distribution box 2. The distribution box 2 is located above the outlet end of each bottom injection pipe 1. The inlet of each bottom injection pipe 1 is connected to the bottom of the distribution box 2. The inlet of the bottom injection pipe 1 is located above the outlet end of the bottom injection pipe 1.

[0043] In the actual casting process, the molten metal flows into the distribution box 2 through the main pipe 3, and then into each bottom injection pipe 1, so as to improve the uniformity of the molten metal flow in each bottom injection pipe 1, thereby further improving the uniformity of the distribution and the stability of the flow of the molten metal in the cavity.

[0044] Furthermore, such as Figure 1 , Figure 2 As shown, the distribution box 2 includes several interconnected distribution chambers 2.1. Each distribution chamber 2.1 corresponds to at least one bottom injection pipe 1, and the inlet of the bottom injection pipe 1 is connected to the corresponding distribution chamber 2.1. In this way, the molten metal flows into the distribution box 2 through the main pipe 3, and is distributed to each distribution chamber 2.1 through the distribution box 2, and then flows into the corresponding bottom injection pipe 1, further improving the uniformity of the molten metal flow in each bottom injection pipe 1, thereby further improving the uniformity of the distribution and the smoothness of the flow of the molten metal in the mold cavity.

[0045] In this embodiment, there are four flow distribution chambers 2.1. One cooling chamber 4.1 corresponds to four bottom injection pipes 1, each of which is connected to one flow distribution chamber 2.1. Another cooling chamber 4.1 corresponds to three bottom injection pipes 1, each of which is connected to one flow distribution chamber 2.1. The first volute 4.2 corresponds to two bottom injection pipes 1, each of which is connected to one flow distribution chamber 2.1. This design helps to further improve the uniformity of molten metal flow in each bottom injection pipe 1, thereby further improving the uniformity of molten metal distribution and the stability of flow within the mold cavity.

[0046] Furthermore, such as Figure 1 , Figure 2 As shown, there are an even number of flow distribution chambers 2.1, symmetrically distributed on both sides of the main pipe 3. In this embodiment, there are four flow distribution chambers 2.1. It should be noted that the number of flow distribution chambers 2.1 can be set according to actual needs, for example, two, six, or more. In this way, after the molten metal flows into the flow distribution box 2 through the main pipe 3, it helps to further improve the uniformity of the molten metal distribution in each flow distribution chamber 2.1, thereby further improving the uniformity of the molten metal flow rate in each bottom injection pipe 1. It should also be noted that there can be an odd number of flow distribution chambers, and the flow distribution chambers can be asymmetrically distributed on both sides of the main pipe.

[0047] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A casting apparatus for a compressor housing casting, the compressor housing casting comprising at least two cooling chambers having open ends, characterized in that, include: The mold includes a cavity and several sand cores disposed within the cavity, with the opening ends of each cooling chamber arranged downwards within the cavity; Several bottom injection pipes are provided, with the outlet end of each bottom injection pipe connected to the bottom of the cavity. Each cooling chamber has at least two bottom injection pipes, and the outlet ends of each bottom injection pipe corresponding to the cooling chamber are distributed sequentially along the edge of the opening end of the cooling chamber.

2. The casting apparatus for a compressor housing casting according to claim 1, characterized in that, The compressor housing casting also includes a first worm gear, one end of which is arranged downward in the cavity. The first worm gear corresponds to at least two bottom injection pipes, and the outlet ends of each bottom injection pipe corresponding to the first worm gear are distributed sequentially along the edge of one end of the first worm gear.

3. The casting apparatus for a compressor housing casting according to claim 2, characterized in that, It also includes a connecting pipe, and the compressor housing casting also includes a second worm gear, one end of which is arranged downward in the cavity. Both ends of the connecting pipe are connected to the bottom of the cavity. One end of the connecting pipe is close to the outlet end of one of the cooling chambers, and the other end of the connecting pipe is close to one end of the second worm gear.

4. A casting apparatus for a compressor housing casting according to claim 2 or 3, characterized in that, The first spiral channel corresponds to two bottom injection pipes.

5. A casting apparatus for a compressor housing casting according to claim 1, 2, or 3, characterized in that, One of the cooling chambers corresponds to four bottom injection pipes.

6. The casting apparatus for a compressor housing casting according to claim 5, characterized in that, One of the cooling chambers corresponds to three bottom injection pipes.

7. A casting apparatus for a compressor housing casting according to claim 1, 2, or 3, characterized in that, It also includes a main pipeline and a distribution box. The main pipeline is connected to the distribution box, which is located above the outlet end of each bottom injection pipeline. The inlet of each bottom injection pipeline is connected to the distribution box.

8. The casting apparatus for a compressor housing casting according to claim 7, characterized in that, The diversion box includes several interconnected diversion chambers, each diversion chamber corresponding to at least one bottom injection pipe, and the inlet of the bottom injection pipe is connected to the corresponding diversion chamber.

9. A casting apparatus for a compressor housing casting according to claim 8, characterized in that, There are an even number of diversion chambers, and each diversion chamber is symmetrically distributed on both sides of the main pipe.

10. A casting apparatus for a compressor housing casting according to claim 1, 2, or 3, characterized in that, The bottom injection pipe is a ceramic pipe.

Images