A casting mold for a moving plate of a compressor

Abstract

The application discloses a movable disc casting die for a compressor, relates to the technical field of compressor part casting, and aims to solve the core problems of poor batch casting synergy and out-of-control forming precision of existing movable disc dies; the die is designed by modular splicing and comprises an upper die, a lower die, a forming cavity and a base plate; the lower die is provided with a positioning column matched with a positioning groove of the upper die to realize precise die closing; the base plate is embedded with a concave block and a convex block to realize rapid splicing of multiple dies; a hollow water cooling cavity is arranged in the base plate, and a water inlet is docked after splicing to form a circulating cooling water channel, thereby guaranteeing synchronous cooling of multiple dies; the upper die is provided with a layered and shunted pouring channel matched with low-positioned side pouring and staggered exhaust structure, thereby optimizing the filling effect of molten metal. Through the structural design of multi-stage positioning, synchronous cooling and smooth pouring, the problems of splicing deviation, uneven cooling, die closing and pouring defects are effectively solved, the qualified rate of movable disc castings and batch production efficiency are greatly improved, and the movable disc precision and large-scale casting demand of the compressor is met.

Description

Technical Field

[0001] This invention belongs to the field of compressor component casting and processing technology, specifically relating to a compressor moving disc casting mold. Background Technology

[0002] As a core power equipment in refrigeration, HVAC, and industrial pneumatics, the compressor's internal moving disc component is a key part that determines the overall operating efficiency, noise level, and service life of the machine. The moving disc itself often features a thin-walled, irregular shape and complex curved surfaces, which places extremely high demands on the dimensional accuracy, internal density, and surface finish of the casting. As the basic process for forming the moving disc, the rationality of the mold structure directly determines the final quality and production efficiency of the moving disc casting.

[0003] Currently, most casting molds for compressor drive discs on the market adopt a single-mold independent design. Although they can complete basic casting forming operations, they expose unavoidable technical shortcomings in large-scale, batch production scenarios. Moreover, all technical problems revolve around the core pain point of poor coordination in batch casting and loss of forming accuracy, which manifests as multiple interconnected technical defects:

[0004] Firstly, when multiple molds are produced in parallel, the lack of standardized and high-precision splicing and limiting structures between the molds, relying solely on simple fitting for assembly, makes them highly susceptible to lateral slippage and longitudinal misalignment during pouring and cooling. This not only leads to inconsistent forming benchmarks between individual molds, causing excessive dimensional deviations in the castings, but also affects the stability of the cooling water circuit connection, creating a chain of quality problems. Secondly, the existing mold cooling systems are all designed with independent water circuits for each mold. During mass production, each mold needs to be connected to a separate cooling pipe, which is not only cumbersome and time-consuming in the assembly process, but also makes it difficult to ensure the synchronization and uniformity of cooling across multiple molds. The unevenness of the casting can easily lead to excessively rapid or slow cooling in certain areas, resulting in fatal defects such as shrinkage cavities, porosity, deformation, and warping, significantly reducing the casting yield. Thirdly, the lack of a precise guiding structure during the mold closing process, relying solely on manual alignment, easily leads to mold misalignment and incorrect mold closing. In addition, the insufficient sealing performance of the mold closing surface can easily cause problems such as molten metal leakage and air intake into the cavity during the pouring process. Fourthly, the conventional pouring channel structure is simple, resulting in uneven flow rate and turbulent flow direction when molten metal is injected into the cavity, which can easily cause defects such as turbulence, air entrapment, and slag inclusion, further aggravating the quality fluctuation of the casting.

[0005] In summary, existing moving disc casting molds lack core batch collaborative casting capabilities, making it impossible to balance production efficiency and molding accuracy. This not only fails to meet the increasingly stringent quality requirements of the compressor industry for moving disc castings but also restricts the development of large-scale moving disc casting.

[0006] Therefore, developing a dynamic casting mold that focuses on solving batch collaborative casting and also features precise splicing and positioning, synchronous circulating cooling, efficient mold closing guidance, and stable pouring and molding has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a casting mold for a moving disc of a compressor, which aims to solve the problems in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a compressor moving disc casting mold, comprising an upper mold, a lower mold, a molding cavity and a base, wherein the molding cavity is formed by the upper mold and the lower mold being joined together, and the lower mold is assembled on the top of the base;

[0009] The lower mold is equipped with a positioning post at the top, and the upper mold is equipped with a positioning groove that matches the positioning post;

[0010] The top of the chassis is provided with a positioning groove that matches the shape of the lower mold, and the lower mold is fitted into the positioning groove;

[0011] The outer wall of the chassis is provided with mutually compatible concave and convex blocks, and multiple chassis are spliced ​​together by interlocking concave and convex blocks;

[0012] The chassis has a hollow water-cooling cavity inside, and the side wall of the chassis has docking water inlets at the corresponding concave and convex positions, which are connected to the hollow water-cooling cavity.

[0013] In the assembled state, the water inlets of adjacent chassis are sealed and connected, and each hollowed-out water-cooling cavity is connected in sequence to form a circulating cooling water channel;

[0014] The upper mold is provided with a pouring channel that connects to the molding cavity, and the molding cavity is provided with an exhaust channel that connects to the outside.

[0015] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the concave blocks and convex blocks are symmetrically arranged along the circumference of the chassis, and after splicing, the mold can be accurately positioned and calibrated to prevent offset and misalignment.

[0016] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the water inlet is aligned with the concave block and the convex block, and the mold splicing realizes water channel connection and structural limit at the same time, thus doubly ensuring assembly accuracy.

[0017] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the pouring channel adopts a layered and diverted structure, which is suitable for the forming of thin-walled irregular parts of compressor moving discs and effectively eliminates defects such as insufficient pouring, air entrapment, and shrinkage cavities.

[0018] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the exhaust channel and the pouring channel are staggered, so that the exhaust is smooth during the pouring process and the casting quality is guaranteed.

[0019] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the outer wall of the water inlet is fitted with a sealing ring, and the adjacent water inlets are sealed at the end face through the sealing ring in the spliced ​​state to prevent leakage of cooling medium.

[0020] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the concave block is a dovetail groove structure and the convex block is a matching dovetail tenon structure. After splicing, it achieves bidirectional limiting in the horizontal and vertical directions, and is locked firmly without loosening.

[0021] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the mating surfaces of the upper mold and the lower mold are provided with stepped sealing platforms. After the mold is closed, the sealing platforms interlock with each other, and the forming cavity forms a closed casting space.

[0022] As a preferred embodiment of the compressor moving disc casting mold of the present invention, the pouring channel includes a main gating system, a flow distribution cavity and multiple branch gating gates from top to bottom, and is symmetrically distributed in a tree-like manner. The main gating system vertically penetrates the middle of the upper mold, and the flow distribution cavity is arranged horizontally and connected to the bottom of the main gating system, so as to achieve uniform distribution of molten metal.

[0023] As a preferred embodiment of the compressor moving disc casting mold of the present invention, multiple branch gates are evenly distributed around the flow distribution cavity, and the bottom end of the branch gates extends to the lower side wall of the forming cavity. The molten metal is stably filled by the low-position side injection method, and the outlet end of the branch gate is rounded to avoid turbulent splashing of molten metal.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The chassis's outer wall features a unique interlocking structure of recessed and protruding blocks, enabling rapid assembly of multiple molds. This eliminates the need for traditional single-mold independent operation. Combined with strategically placed water inlets, the water system is connected synchronously during assembly, resolving the problems of inaccurate positioning and cumbersome water system connections in multi-mold assembly. A unified circulating cooling system ensures simultaneous cooling of multiple molds, guaranteeing uniform cooling of batch castings and eliminating casting defects caused by uneven cooling and positioning misalignment. This balances production efficiency and molding quality. A double-layer positioning structure is employed: the lower mold and chassis are positioned via positioning grooves, while the upper and lower molds are positioned via positioning pins. The groove guides the mold closing process, and together with the dovetail groove and dovetail tenon bidirectional limiting splicing structure, a multi-level positioning system is formed, which completely solves problems such as mold closing misalignment, splicing offset, and assembly displacement, ensuring that the dimensional accuracy of the moving plate casting is stable and meets the standards. The layered and diverted tree-shaped pouring channel, combined with low-position side pouring and rounded corner transition design, realizes the smooth and orderly filling of molten metal, effectively avoiding defects such as turbulence, air entrapment, slag inclusion, and incomplete pouring. The water channel docking structure reinforced with sealing rubber rings prevents the leakage of cooling medium, ensures circulation cooling efficiency, and the hollow water cooling cavity provides full-coverage heat exchange, further improving cooling uniformity and reducing casting shrinkage cavities and deformation problems. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0028] Figure 2 This is a schematic diagram of the chassis structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the lower mold structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the pouring channel structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the upper and lower mold separation structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the hollow water-cooling cavity structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the upper mold structure of the present invention.

[0034] In the diagram: 1. Upper mold; 2. Lower mold; 3. Molding cavity; 4. Base plate; 5. Positioning groove; 6. Concave block; 7. Protruding block; 8. Hollowed-out water-cooling cavity; 9. Water inlet; 10. Gating channel; 11. Venting channel; 12. Sealing ring; 13. Main runner; 14. Runner; 15. Branch gate; 16. Stepped sealing platform; 18. Positioning post; 19. Positioning groove. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention relates to a compressor moving disc casting mold, comprising four core components: an upper mold 1, a lower mold 2, a forming cavity 3, and a chassis 4. Each component is made of heat-resistant alloy material, possessing good high-temperature strength, wear resistance, and thermal conductivity, and is suitable for the working environment of high-temperature molten metal casting.

[0037] Furthermore, the forming cavity 3 is formed by the closing of the upper mold 1 and the lower mold 2. The inner contour of the forming cavity 3 is strictly machined according to the design shape of the compressor moving disc to ensure that the size and shape of the casting conform to the design requirements after forming, without any flash, burrs or other unnecessary structures, reducing the amount of subsequent finishing work. The lower mold 2 can be detachably assembled on the top of the chassis 4. The chassis 4 serves as the supporting base for the lower mold 2, and the whole adopts a thick block structure to ensure support stability and avoid deformation due to stress during the pouring process.

[0038] Furthermore, the lower mold 2 is symmetrically fixed with positioning posts 18 on its top. The positioning posts 18 and the lower mold 2 are integrally formed to ensure a firm connection and accurate positioning. The upper mold 1 has a positioning groove 19 at the corresponding position on its bottom. The inner diameter and depth of the positioning groove 19 are matched with the outer diameter and height of the positioning post 18. When the mold is closed, the positioning post 18 can be smoothly inserted into the positioning groove 19, realizing the rapid guidance and closing of the upper and lower molds without the need for repeated manual alignment and calibration. This not only improves the mold closing efficiency but also eliminates the problem of incorrect mold closing.

[0039] Furthermore, a positioning groove 5 is provided on the top of the chassis 4. The outline dimensions of the positioning groove 5 are completely matched with the outline dimensions of the bottom of the lower mold 2. The bottom of the lower mold 2 is embedded in the positioning groove 5. The side wall of the positioning groove 5 forms a circumferential limit on the lower mold 2 to prevent the lower mold 2 from undergoing horizontal displacement during the pouring and cooling process, further ensuring the overall positioning accuracy of the mold and ensuring that the position of the molding cavity 3 remains stable.

[0040] Furthermore, the outer walls of opposite sides of the chassis 4 are integrally formed with concave blocks 6 and protrusions 7, respectively. The concave blocks 6 and protrusions 7 are symmetrically arranged around the circumference of the chassis 4. The concave blocks 6 have a dovetail groove structure, and the protrusions 7 have a dovetail tenon structure that matches the dovetail groove. During mass production, multiple sets of chassis 4 are arranged sequentially, so that the protrusions 7 of adjacent chassis 4 are embedded into the corresponding concave blocks 6, completing the series splicing of multiple sets of molds. The interlocking structure of the dovetail groove and the dovetail tenon can simultaneously restrict the lateral and longitudinal displacement of the chassis 4, ensuring a firm and non-loose splicing without the need for additional bolts, clips, or other fasteners, greatly simplifying the mass assembly process.

[0041] Furthermore, the interior of the chassis 4 is hollow, forming a perforated water-cooling cavity 8. The perforated water-cooling cavity 8 covers the entire bottom area of ​​the lower mold 2, ensuring that the cooling medium can fully exchange heat with the lower mold 2 and achieve uniform cooling. A buttress-type water inlet 9 is opened at the center of the concave block 6 and convex block 7 on the side wall of the chassis 4. The water inlet 9 penetrates the side wall of the chassis 4 and connects to the interior of the perforated water-cooling cavity 8, and the axis of the water inlet 9 coincides with the fitting axis of the concave block 6 and convex block 7. After multiple chassis 4 are assembled, the water inlets 9 of adjacent chassis 4 automatically align and connect. The perforated water-cooling cavities 8 inside each chassis 4 are sequentially connected through the water inlets 9, forming a continuous circulating cooling water channel. By connecting cooling medium supply equipment and recovery equipment at both ends, synchronous circulating cooling of multiple molds can be achieved, ensuring a consistent cooling rhythm for batch castings.

[0042] Furthermore, a sealing ring 12 is fitted on the outer wall of the water inlet 9. The sealing ring 12 is made of high-temperature resistant rubber and has good elasticity and sealing performance. In the spliced ​​state, the end faces of adjacent water inlets 9 press against each other to squeeze the sealing ring 12, causing the sealing ring 12 to undergo elastic deformation to fill the joint gap, thereby achieving end face sealing, preventing leakage of cooling medium at the joint position, ensuring the airtightness of the circulating cooling water circuit, and ensuring stable cooling efficiency.

[0043] Furthermore, the upper mold 1 is provided with a gating channel 10. The gating channel 10 adopts a layered flow-dividing structure, which includes a main gating 13, a flow-dividing cavity 14 and multiple branch gates 15 from top to bottom, and is distributed in a tree-like symmetrical manner. The main runner 13 runs vertically through the middle of the upper mold 1, serving as the main feed channel for molten metal. Its upper opening facilitates connection with the casting equipment. The branch runner 14 is arranged horizontally inside the upper mold 1 and is connected to the bottom of the main runner 13. It is used to evenly distribute the molten metal to each branch gate 15, avoiding excessive local flow velocity that could impact the inner wall of the molding cavity 3. Multiple branch gates 15 are evenly distributed around the branch runner 14, with the bottom of the branch gates 15 extending to the lower side wall of the molding cavity 3. The low-position side-feeding method allows the molten metal to slowly climb and fill along the inner wall of the molding cavity 3, avoiding direct impact on the bottom of the cavity and causing turbulent splashing. The outlet end of the branch gate 15 is rounded to optimize the flow trajectory of the molten metal, reduce flow resistance, prevent turbulent flow and air entrapment, and effectively eliminate defects such as incomplete filling, air entrapment, and shrinkage cavities.

[0044] Furthermore, the top of the molding cavity 3 is provided with an exhaust channel 11. One end of the exhaust channel 11 is connected to the inside of the molding cavity 3, and the other end extends to the outside of the upper mold 1 and is connected to the atmosphere. The exhaust channel 11 and the pouring channel 10 are arranged in a staggered manner to avoid the molten metal entering the exhaust channel 11 during the pouring process and causing blockage. This ensures that the air in the cavity can be smoothly discharged during the pouring process, maintains the air pressure balance inside the cavity, and ensures smooth filling of the molten metal.

[0045] Furthermore, the upper mold 1 and the lower mold 2 are provided with stepped sealing platforms 16 on their mating surfaces. The stepped sealing platforms 16 are respectively located at the lower edge of the mating surface of the upper mold 1 and the upper edge of the mating surface of the lower mold 2. After the molds are closed, the stepped sealing platforms 16 of the upper and lower molds interlock and fit together, so that the molding cavity 3 forms a completely sealed casting space, preventing molten metal from leaking from the mating surface during the pouring process. At the same time, it further improves the stability of the mold structure and prevents separation after the molds are closed.

[0046] When using:

[0047] The first step is mold assembly: According to the mass production requirements, select the corresponding number of chassis 4, and interlock the adjacent chassis 4 with the concave blocks 6 and convex blocks 7 to complete the series splicing of multiple chassis 4. During the splicing process, the adjacent water inlets 9 are automatically aligned, the sealing rings 12 achieve water circuit sealing, and the hollow water cooling cavities 8 are connected to form an overall circulating cooling water circuit. Connect the water inlet of the circulating cooling water circuit to the cooling water pump and the water outlet to the cooling water tank to complete the cooling system assembly.

[0048] The second step is to assemble and position the lower mold: the lower mold 2 is sequentially inserted into the positioning groove 5 on the top of each set of chassis 4. The side wall of the positioning groove 5 limits the precise assembly of the lower mold 2 and chassis 4, ensuring that the lower mold 2 is fixed in position and has no displacement.

[0049] The third step is to close the upper and lower molds: Align the positioning groove 19 at the bottom of the upper mold 1 with the positioning post 18 at the top of the lower mold 2, and slowly press the upper mold 1 down vertically so that the positioning post 18 is fully embedded in the positioning groove 19 until the stepped sealing platform 16 of the upper and lower molds interlocks with each other, thus completing the mold closing operation. After the mold is closed, the molding cavity 3 forms a sealed space.

[0050] The fourth step is the casting and molding process: Molten metal is injected into the main runner 13 of the casting channel 10 through the casting equipment. The molten metal flows into the distribution chamber 14 through the main runner 13 and is evenly distributed to each branch gate 15. Then, it slowly rises and fills the lower side wall of the molding cavity 3 through the branch gate 15. The air in the molding cavity 3 is smoothly discharged through the exhaust channel 11 until the molten metal completely fills the molding cavity 3, and the casting is stopped.

[0051] Step 5, synchronous cooling and demolding: After casting is completed, start the cooling water pump to make the cooling medium flow continuously in the circulating cooling water circuit, and cool multiple sets of molds synchronously and evenly. After the molten metal in the forming cavity 3 has completely cooled and solidified into the moving plate casting, stop cooling, separate the upper mold 1 and the lower mold 2, and take out the formed moving plate casting to complete a single casting operation; the above process can be repeated to achieve continuous batch production.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compressor moving disc casting mold, comprising an upper mold (1), a lower mold (2), a forming cavity (3), and a base (4), wherein the forming cavity (3) is formed by the upper mold (1) and the lower mold (2) being joined together, and the lower mold (2) is assembled on the top of the base (4); characterized in that: The lower mold (2) is provided with a positioning post (18) at the top, and the upper mold (1) is provided with a positioning groove (19) that matches the positioning post (18). The top of the chassis (4) is provided with a positioning groove (5) that matches the shape of the lower mold (2), and the lower mold (2) is fitted into the positioning groove (5); The outer wall of the chassis (4) is provided with mutually compatible concave blocks (6) and convex blocks (7), and multiple chassis (4) are spliced ​​together by the concave blocks (6) and convex blocks (7); The chassis (4) has a hollow water-cooling cavity (8) inside. The side wall of the chassis (4) has a docking water inlet (9) at the position of the concave block (6) and the convex block (7). The water inlet (9) is connected to the hollow water-cooling cavity (8). In the splicing state, the water inlets (9) of adjacent chassis (4) are sealed and connected, and each hollow water cooling cavity (8) is connected in sequence to form a circulating cooling water channel; The upper mold (1) is provided with a pouring channel (10) that connects to the molding cavity (3), and the molding cavity (3) is provided with an exhaust channel (11) that connects to the outside.

2. The compressor moving disc casting mold according to claim 1, characterized in that: The concave blocks (6) and convex blocks (7) are symmetrically arranged around the chassis (4) and are spliced ​​together to achieve precise positioning and calibration of the mold, preventing offset and misalignment.

3. The compressor moving disc casting mold according to claim 1, characterized in that: The water inlet (9) is aligned with the concave block (6) and the convex block (7), and the mold splicing realizes water channel connection and structural limit at the same time, thus ensuring assembly accuracy.

4. The compressor moving disc casting mold according to claim 1, characterized in that: The pouring channel (10) adopts a layered and diverted structure, which is suitable for the forming of thin-walled irregular parts of the compressor moving plate, effectively eliminating defects such as insufficient pouring, air entrapment, and shrinkage.

5. The compressor moving disc casting mold according to claim 1, characterized in that: The exhaust channel (11) and the pouring channel (10) are staggered to ensure smooth exhaust during the pouring process and guarantee the quality of the casting.

6. The compressor moving disc casting mold according to claim 1, characterized in that: The outer wall of the water inlet (9) is fitted with a sealing ring (12). When the water inlets (9) are spliced, the end faces of adjacent water inlets (9) are sealed by the sealing ring (12) to prevent leakage of cooling medium.

7. The compressor moving disc casting mold according to claim 1, characterized in that: The concave block (6) is a dovetail groove structure, and the convex block (7) is a matching dovetail tenon structure. After splicing, it achieves horizontal and vertical bidirectional positioning, and is locked firmly without loosening.

8. The compressor moving disc casting mold according to claim 1, characterized in that: The upper mold (1) and the lower mold (2) are provided with stepped sealing platforms (16). After the molds are closed, the sealing platforms (16) interlock with each other, and the molding cavity (3) forms a closed casting space.

9. The compressor moving disc casting mold according to claim 8, characterized in that: The pouring channel (10) includes a main gating (13), a flow distribution cavity (14) and multiple branch gates (15) from top to bottom, and is symmetrically distributed in a tree-like shape. The main gating (13) vertically penetrates the middle of the upper mold (1), and the flow distribution cavity (14) is arranged horizontally and connected to the bottom of the main gating (13) to achieve uniform distribution of molten metal.

10. The compressor moving disc casting mold according to claim 8, characterized in that: Multiple branch gates (15) are evenly distributed around the flow chamber (14). The bottom of the branch gates (15) extends to the lower side wall of the forming cavity (3). The molten metal is smoothly filled by the low-position side injection method. The outlet end of the branch gates (15) is rounded to avoid turbulent splashing of molten metal.

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