A high-efficiency venting structure for die casting molds

Abstract

This utility model discloses a high-efficiency venting structure for die-casting molds, relating to the field of mold technology. It includes: a fixed mold and a moving mold; the fixed mold has a cavity at the top center, and the moving mold has a mold base fixedly installed at the bottom, inserted into the cavity; a venting groove is located at the bottom center of the mold base, and a venting hole penetrating the mold base and the moving mold is located at the top of the venting groove; a venting assembly is located inside the venting groove; and a cooling assembly is fixedly installed at the top of the venting pipe. This utility model achieves automatic venting, preventing molten metal leakage and ensuring venting efficiency. It also extends the flow path of high-temperature gas within the venting stack. Combined with circulating cold water and heat dissipation fins in the water tank, it can quickly absorb gas heat, reduce the venting temperature, prevent direct venting of high-temperature gas from scalding operators, and reduce the impact on the workshop environment temperature.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a high-efficiency venting structure for die-casting molds. Background Technology

[0002] Die casting is a casting method in which molten metal is rapidly injected into a mold cavity under high pressure and then solidified under pressure. If the gas inside the mold cavity cannot be expelled in time during die casting, defects such as porosity and looseness will occur inside the casting, seriously affecting its quality and performance.

[0003] Currently, traditional venting methods for die-casting molds mainly include opening venting grooves and using venting plugs. During the venting process, the gas discharged during die-casting is often mixed with high-temperature metal vapor and volatile release agent. These high-temperature gases are directly discharged into the work area, which not only raises the ambient temperature of the workshop but also affects the working comfort and safety of the operators. Therefore, it is urgent to design an efficient venting structure for die-casting molds to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a highly efficient exhaust structure for die-casting molds. Its advantages include rapid absorption of gas heat, reduction of exhaust temperature, prevention of burns to operators from direct emission of high-temperature gas, and minimization of the impact on the workshop environment temperature.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency venting structure for a die-casting mold, comprising:

[0007] The fixed mold and the moving mold are provided. The fixed mold has a mold cavity at the top center, and the moving mold has a mold base that is fixedly installed at the bottom and inserted into the mold cavity.

[0008] The venting groove is located at the bottom center of the mold base, and the top of the venting groove has a venting hole that penetrates the mold base and the moving mold. An venting pipe is fixed to the top of the venting hole.

[0009] An exhaust assembly, wherein the exhaust assembly is disposed inside an exhaust channel;

[0010] A cooling assembly, which is fixedly mounted on top of the exhaust pipe.

[0011] The above technical solutions aim to prevent high-temperature gas from directly escaping and scalding operators, while also reducing the impact on the workshop's ambient temperature.

[0012] The present invention is further configured such that the exhaust assembly includes a fixing ring fixed to the inner wall of the exhaust groove, and the inner wall of the fixing ring is fixed with connecting rods distributed at equal intervals. One end of the connecting rod is fixed with a guide sleeve. The inner wall of the guide sleeve is inserted with a movable column, and a plug is fixedly installed at the bottom of the movable column. A spring is fixedly installed at the top of the plug and the bottom of the guide sleeve.

[0013] The present invention is further configured such that the bottom of the outer wall of the plug and the bottom of the inner wall of the exhaust groove are both designed as bevels, and the bottom of the outer wall of the plug fits into the bottom of the inner wall of the exhaust groove, and the outer diameter of the plug is smaller than the inner diameter of the exhaust groove.

[0014] The above technical solutions facilitate exhaust operations.

[0015] The present invention is further configured such that the cooling assembly includes an exhaust cylinder fixedly installed on the top of the exhaust pipe, and mounting rods are fixedly arranged at equal intervals on the top and bottom of the inner wall of the exhaust cylinder. One end of each mounting rod is fixed with the same central rod, and a spiral blade is fixedly installed on the outer wall of the central rod. The outer wall of the spiral blade is in contact with the inner wall of the exhaust cylinder.

[0016] The above technical solution extends the gas flow path by using spiral blades to achieve gas cooling.

[0017] The present invention is further configured such that the outer wall of the exhaust pipe has multiple rows of equally spaced heat dissipation grooves, and the inner wall of each heat dissipation groove is fixedly installed with heat dissipation fins.

[0018] The above technical solutions facilitate the dissipation of heat from the exhaust gas.

[0019] The present invention is further configured such that a water storage tank is fixedly installed on the outer wall of the exhaust pipe, and heat dissipation fins are arranged inside the water storage tank. A cold water inlet pipe is fixed on one side of the bottom of the water storage tank, and a cold water return pipe is fixed on one side of the top of the water storage tank. A cold water circulator is provided at one end of the cold water inlet pipe and one end of the cold water return pipe.

[0020] The above technical solution involves recirculating cold water into the water storage tank to further absorb heat from the gas and effectively reduce the exhaust temperature.

[0021] The present invention is further configured such that a base is fixedly installed at the bottom of the moving mold, and a fixed mold is positioned directly above the moving mold. The top of the fixed mold has multiple positioning holes, and a positioning post inserted into the positioning hole is fixed at the bottom of the moving mold. A mold handle is fixedly installed at the top of the moving mold, and the mold handle is connected to a hydraulic mechanism.

[0022] The above technical solutions ensure the positional accuracy of the fixed mold and moving mold when they are closed, reduce poor venting or mold wear caused by misalignment, extend the service life of the mold, and facilitate the lifting and lowering of the moving mold through the cooperation of the hydraulic mechanism and the mold handle.

[0023] The present invention is further configured such that an annular groove is provided on the top of the fixed mold, and a sealing ring is fixedly installed on the bottom of the moving mold, wherein the outer wall of the sealing ring is adapted to the inner wall of the annular groove.

[0024] The above technical solutions enhance the sealing performance after mold closing, prevent gas leakage from mold gaps, ensure the efficiency of the venting system, and avoid molten metal overflow.

[0025] The beneficial effects of this utility model are as follows:

[0026] 1. This utility model forms a continuous exhaust channel through the exhaust groove at the bottom of the mold base, the exhaust hole and exhaust pipe that pass through the mold base and the moving mold, which can quickly exhaust the gas in the mold cavity, reduce defects such as porosity and looseness in the casting caused by gas retention, improve the casting quality, and during the die casting process, the gas pressure in the mold cavity gradually increases, which can push the plug compression spring to open the exhaust channel and realize automatic exhaust, which can both avoid metal leakage and ensure exhaust efficiency.

[0027] 2. This utility model extends the flow path of high-temperature gas in the exhaust pipe by using the spiral blades in the cooling component. Combined with the circulating cold water and heat dissipation fins in the water storage tank, it can quickly absorb the heat of the gas, reduce the exhaust temperature, avoid the direct emission of high-temperature gas and burn the operators, and at the same time reduce the impact on the ambient temperature of the workshop. Attached Figure Description

[0028] Figure 1 This is a perspective view of a high-efficiency venting structure for a die-casting mold proposed in this utility model;

[0029] Figure 2 This is a front sectional view of a high-efficiency venting structure for a die-casting mold proposed in this utility model;

[0030] Figure 3 This is a schematic diagram of the exhaust component structure of a high-efficiency exhaust structure for a die-casting mold proposed in this utility model;

[0031] Figure 4 This is a schematic diagram of the cooling component structure of a high-efficiency exhaust structure for a die-casting mold proposed in this utility model;

[0032] Figure 5 This is a schematic diagram of the mounting rod and heat dissipation groove structure of a high-efficiency venting structure for a die-casting mold proposed in this utility model.

[0033] In the diagram: 1. Base; 2. Fixed mold; 3. Moving mold; 4. Mold handle; 5. Cooling assembly; 51. Exhaust pipe; 52. Center rod; 53. Spiral blade; 54. Cold water inlet pipe; 55. Water storage tank; 56. Heat dissipation fins; 57. Cold water return pipe; 58. Mounting rod; 59. Heat dissipation groove; 6. Mold cavity; 7. Exhaust assembly; 71. Fixing ring; 72. Connecting rod; 73. Guide sleeve; 74. Movable column; 75. Spring; 76. Plug; 8. Mold base; 9. Positioning hole; 10. Positioning column; 11. Exhaust groove; 12. Exhaust hole; 13. Exhaust pipe; 14. Sealing ring; 15. Annular groove. Detailed Implementation

[0034] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0035] Reference Figures 1-5 This utility model provides a high-efficiency venting structure for die-casting molds, comprising:

[0036] The fixed mold 2 and the moving mold 3 are provided. The fixed mold 2 has a mold cavity 6 at the top center, and the moving mold 3 has a mold base 8 that is fixedly installed in the mold cavity 6 at the bottom.

[0037] The venting groove 11 is located at the bottom center of the mold base 8, and the top of the venting groove 11 is provided with a venting hole 12 that penetrates the mold base 8 and the moving mold 3. An venting pipe 13 is fixed to the top of the venting hole 12.

[0038] The venting assembly 7 is located inside the venting groove 11. The venting assembly 7 includes a fixing ring 71 fixed to the inner wall of the venting groove 11, and connecting rods 72 evenly distributed are fixed to the inner wall of the fixing ring 71. A guide sleeve 73 is fixed to one end of the connecting rod 72. A movable column 74 is inserted into the inner wall of the guide sleeve 73, and a plug 76 is fixedly installed at the bottom of the movable column 74. A spring 75 is fixedly installed at the top of the plug 76 and the bottom of the guide sleeve 73. The bottom of the outer wall of the plug 76 and the bottom of the inner wall of the venting groove 11 are both designed as bevels, and the bottom of the outer wall of the plug 76 fits against the bottom of the inner wall of the venting groove 11. The outer diameter of the plug 76 is smaller than the inner diameter of the venting groove 11, so that the gas generated in the mold cavity 6 is pressurized and enters the venting groove 11. The gas pressure pushes the plug 76 in the venting assembly 7 to move upward, the spring 75 is compressed, the plug 76 separates from the inner wall of the venting groove 11, and the gas enters the venting hole 12 through the gap and is then discharged through the venting pipe 13 to realize the venting operation.

[0039] The cooling assembly 5 is fixedly installed on the top of the exhaust pipe 13. The cooling assembly 5 includes an exhaust pipe 51 fixedly installed on the top of the exhaust pipe 13. The top and bottom of the inner wall of the exhaust pipe 51 are fixed with equally spaced mounting rods 58. One end of the mounting rods 58 is fixed with the same central rod 52. The outer wall of the central rod 52 is fixedly installed with a spiral blade 53. The outer wall of the spiral blade 53 is in contact with the inner wall of the exhaust pipe 51. The outer wall of the exhaust pipe 51 has multiple rows of equally spaced heat dissipation grooves 59. The inner wall of each heat dissipation groove 59 is fixedly installed with heat dissipation fins 56. The high-temperature gas is introduced into the exhaust pipe 51 of the cooling assembly 5. The spiral blades 53 extend the gas flow path, and the heat dissipation fins 56 cool the gas, preventing the high-temperature gas from being directly emitted and burning the operators, while reducing the impact on the ambient temperature of the workshop.

[0040] To further cool the discharged gas, refer to Figure 4 and Figure 5 A water storage tank 55 is fixedly installed on the outer wall of the exhaust pipe 51, and heat dissipation fins 56 are set inside the water storage tank 55. A cold water inlet pipe 54 is fixed on one side of the bottom of the water storage tank 55, and a cold water return pipe 57 is fixed on one side of the top of the water storage tank 55. A cold water circulator is installed at one end of the cold water inlet pipe 54 and one end of the cold water return pipe 57. The cold water circulator, in conjunction with the cold water inlet pipe 54 and the cold water return pipe 57, returns the cold water to the water storage tank 55 to further absorb the heat of the gas and fully reduce the exhaust temperature.

[0041] To facilitate adjusting the height of the moving mold 3, refer to... Figure 1 and Figure 2 The bottom of the moving mold 3 is fixedly installed with a base 1, and the fixed mold 2 is positioned directly above the moving mold 3. The top of the fixed mold 2 has multiple positioning holes 9, and the bottom of the moving mold 3 is fixedly installed with a positioning pin 10 inserted into the positioning hole 9. The top of the moving mold 3 is fixedly installed with a mold handle 4, which is connected to the hydraulic mechanism. Through the insertion and cooperation of the positioning pin 10 and the positioning hole 9, the positional accuracy of the fixed mold 2 and the moving mold 3 when they are closed is ensured, reducing the poor air venting or mold wear caused by misalignment, extending the service life of the mold, and the cooperation of the hydraulic mechanism and the mold handle 4 facilitates the lifting and lowering of the moving mold 3.

[0042] To ensure the sealing between the fixed mold 2 and the moving mold 3, refer to Figure 2 The top of the fixed mold 2 is provided with an annular groove 15, and the bottom of the moving mold 3 is fixedly installed with a sealing ring 14. The outer wall of the sealing ring 14 is adapted to the inner wall of the annular groove 15. The fixed mold 2 and the moving mold 3 enhance the sealing performance after mold closing through the cooperation of the sealing ring 14 and the annular groove 15, prevent gas from leaking from the mold gap, ensure the efficiency of the exhaust system, and avoid the overflow of molten metal.

[0043] Working principle: During the die casting process, the gas generated in the mold cavity 6 is pressurized and enters the venting groove 11. The gas pressure pushes the plug 76 in the venting assembly 7 to move upward, the spring 75 is compressed, the plug 76 separates from the inner wall of the venting groove 11, the gas enters the venting hole 12 through the gap, and is then discharged through the venting pipe 13. When the pressure in the mold cavity 6 decreases, the spring 75 returns to its original position and pushes the plug 76 downward, the outer wall of the plug 76 fits against the inner wall of the venting groove 11 to prevent the molten metal from flowing back in.

[0044] The high-temperature gas discharged enters the exhaust pipe 51 of the cooling component 5. The spiral blades 53 fixed by the central rod 52 and the mounting rod 58 extend the gas flow path. At the same time, the circulating cold water in the water storage tank 55 absorbs heat through the heat dissipation fins 56, and the heat dissipation groove 59 assists in heat dissipation, thereby achieving gas cooling. Finally, the cooled gas is discharged outside the mold.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency venting structure of a die-casting mold, characterized by comprising: include: The fixed mold (2) and the moving mold (3) are provided. The fixed mold (2) has a mold cavity (6) at the top center and the moving mold (3) has a mold base (8) fixedly installed at the bottom and inserted into the mold cavity (6). The exhaust groove (11) is located at the bottom center of the mold base (8), and the top of the exhaust groove (11) is provided with an exhaust hole (12) that penetrates the mold base (8) and the moving mold (3). An exhaust pipe (13) is fixed to the top of the exhaust hole (12). An exhaust assembly (7) is disposed inside an exhaust channel (11); Cooling assembly (5) is fixedly mounted on top of exhaust pipe (13).

2. The high-efficiency venting structure of a die-casting mold according to claim 1, characterized in that, The exhaust assembly (7) includes a fixing ring (71) fixed to the inner wall of the exhaust groove (11), and the inner wall of the fixing ring (71) is fixed with connecting rods (72) distributed at equal intervals. One end of the connecting rod (72) is fixed with a guide sleeve (73). The inner wall of the guide sleeve (73) is inserted with a movable column (74), and a plug (76) is fixedly installed at the bottom of the movable column (74). A spring (75) is fixedly installed at the top of the plug (76) and the bottom of the guide sleeve (73).

3. The high-efficiency venting structure of a die-casting mold according to claim 2, characterized in that, The bottom of the outer wall of the plug (76) and the bottom of the inner wall of the exhaust groove (11) are both designed as bevels, and the bottom of the outer wall of the plug (76) fits into the bottom of the inner wall of the exhaust groove (11). The outer diameter of the plug (76) is smaller than the inner diameter of the exhaust groove (11).

4. The high-efficiency venting structure of a die-casting mold according to claim 1, characterized in that, The cooling assembly (5) includes an exhaust pipe (51) fixedly installed on the top of the exhaust pipe (13), and mounting rods (58) are fixed at equal intervals on the top and bottom of the inner wall of the exhaust pipe (51). One end of the mounting rod (58) is fixed with the same central rod (52), and a spiral blade (53) is fixedly installed on the outer wall of the central rod (52). The outer wall of the spiral blade (53) is in contact with the inner wall of the exhaust pipe (51).

5. The high-efficiency venting structure of a die-casting mold according to claim 4, characterized in that, The outer wall of the exhaust pipe (51) has multiple rows of equally spaced heat dissipation grooves (59), and the inner wall of each heat dissipation groove (59) is fixedly equipped with heat dissipation fins (56).

6. The high-efficiency venting structure of a die-casting mold according to claim 5, characterized in that, A water storage tank (55) is fixedly installed on the outer wall of the exhaust pipe (51), and heat dissipation fins (56) are arranged inside the water storage tank (55). A cold water inlet pipe (54) is fixed on one side of the bottom of the water storage tank (55), and a cold water return pipe (57) is fixed on one side of the top of the water storage tank (55). A cold water circulator is provided at one end of the cold water inlet pipe (54) and one end of the cold water return pipe (57).

7. The high-efficiency venting structure of a die-casting mold according to claim 1, characterized by, The bottom of the moving mold (3) is fixedly installed with a base (1), and the fixed mold (2) is set directly above the moving mold (3). The top of the fixed mold (2) is provided with multiple positioning holes (9), and the bottom of the moving mold (3) is fixedly provided with a positioning pin (10) inserted into the positioning hole (9). The top of the moving mold (3) is fixedly installed with a mold handle (4), which is connected to the hydraulic mechanism.

8. The high-efficiency venting structure of a die-casting mold according to claim 1, characterized in that, The top of the fixed mold (2) is provided with an annular groove (15), and the bottom of the moving mold (3) is fixedly installed with a sealing ring (14), the outer wall of the sealing ring (14) being adapted to the inner wall of the annular groove (15).

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