Die casting system for metal parts

Abstract

The present invention discloses a die-casting system for metal parts, comprising an upper die having a cavity, a lower die having a core, a diverter cone connected to one end of the lower die, and a sprue sleeve connected to the diverter cone. The upper opening of the sprue sleeve is connected to a die-casting machine, and the lower end of the sprue sleeve is connected to the diverter cone. A first cap body is fixedly connected to the lower surface of the lower die, and the lower end of the first movable column is embedded in the first cap body. An elastic component is sleeved on the first movable column and located between the lower surface of the first flange and the first cap body. The elastic component is composed of a plurality of staggered and stacked elastic sheets. The present invention can overcome problems such as molding defects at the front end of a part due to insufficient pressure caused by the front end of the part being too far from the die-casting liquid inlet, further improving the quality of the formed part.

Description

Technical Field

[0001] The present invention relates to the technical field of die casting, and in particular to a die casting system for metal parts. Background Art

[0002] A die-casting machine is a series of industrial casting machines that hydraulically injects molten metal into a die under pressure, where it cools and forms, producing a solid metal casting after the die is opened. As one of the most advanced metal forming methods, die-casting is an effective way to achieve minimal metal cutting in modern metal forming processes. Furthermore, die-cast metal parts closely resemble the final shape and size requirements, offering unparalleled advantages over other processes for the mass production of complex precision castings. The die-casting mold has a cavity with several molten metal filling channels located within it. The channels are terminated by centralized exhaust ducts.

[0003] In terms of technology, die casting, like other manufacturing methods, also has some disadvantages: during die casting, the molten metal fills the cavity in a high-speed jet state, the flow state is unstable, most of the gas in the cavity cannot be discharged in time and will inevitably be drawn into the molten metal and eventually remain in the casting in the form of pores. There are also some oxide inclusions, which lead to defects such as poor mechanical properties of the die casting. Summary of the Invention

[0004] The main purpose of the present invention is to provide a die-casting system for metal parts, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention adopts a technical solution as follows: a die-casting system for metal parts, comprising an upper die having a cavity, a lower die having a core, a diverter cone connected to one end of the lower die, and a sprue bushing connected to the diverter cone, wherein the upper opening of the sprue bushing is connected to the injection structure of the die-casting machine, and the lower end of the sprue bushing is connected to the diverter cone through-through, and a first runner groove is provided on the upper surface of the lower die, located between the core and the diverter cone, and the first runner groove is connected to the gap formed between the cavity and the core;

[0006] The core has a recessed portion at the center of its upper surface, a first through hole penetrating the recessed portion is formed on the core, a first movable post is mounted in the first through hole and can move up and down in the first through hole, the upper surface of the first movable post is flush with the bottom surface of the recessed portion, a first flange portion is provided at the lower portion of the first movable post along the circumferential direction, a first cap body is fixedly connected to the lower surface of the lower mold, the lower end of the first movable post is embedded in the first cap body, an elastic component is sleeved on the first movable post and is located between the lower surface of the first flange portion and the first cap body, the elastic component is formed by a plurality of spring sheets that are staggered and stacked;

[0007] A second runner groove is provided on the upper surface of the core and on the side of the core opposite to the diverter cone, the second runner groove is connected to the gap formed between the cavity and the core, the lower mold is provided with a second through hole which is connected to the second runner groove, a second movable column which can move up and down in the second through hole is installed in the second through hole, the top surface of the second movable column is flush with the bottom surface of the second runner groove, the lower part of the second movable column has a second flange portion arranged along the circumferential direction, a second cap body is fixedly connected to the lower surface of the lower mold, the lower end of the second movable column is embedded in the second cap body, a second elastic component is sleeved on the second movable column, and is located between the lower surface of the second flange portion and the second cap body;

[0008] The diverter cone has a diverter groove in the middle of the upper surface, and a guide groove for connecting the diverter groove and the first flow channel groove is also provided on the upper surface of the diverter cone. The diverter cone also has a third through hole connected to the diverter groove, and a third movable column that can move up and down in the third through hole is installed in the third through hole. The top surface of the third movable column is flush with the bottom surface of the diverter groove, and the lower part of the third movable column has a third flange portion arranged along the circumferential direction. A third cap body is fixedly connected to the lower surface of the diverter cone, and the lower end of the third movable column is embedded in the third cap body. A third elastic component is mounted on the third movable column and is located between the lower surface of the third flange portion and the third cap body.

[0009] The further improved scheme in the above technical scheme is as follows:

[0010] 1. In the above solution, at least two corners of the upper surface of the lower mold have a protrusion.

[0011] 2. In the above solution, a plurality of grooves corresponding to the protrusions are provided on the lower surface of the upper mold.

[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0013] 1. The die-casting system for metal parts of the present invention, through the arrangement of movable columns and elastic components, can provide a pressure buffer when the die-casting liquid enters the mold, thereby applying reverse pressure to the part during the part molding process, providing continuous pressure to the locally thicker part area. This prevents the situation where the externally applied pressure fails to act on the locally thicker part area after the surrounding area of ​​the part is molded first, resulting in a lack of pressure in the local part area, which affects the molding speed, effect, and precision.

[0014] 2. The die-casting molding system for metal parts of the present invention has a second runner groove formed on the upper surface of the core, located on the side of the core opposite to the diverter cone. This second runner groove is connected to the gap formed between the mold cavity and the mold core. The provision of the second runner groove provides a molding buffer space to ensure balanced and stable pressure. At the same time, it can remove gas and oxide inclusions that have not been discharged from the mold cavity and enter the molten metal and eventually form slag bags in the second runner groove, thereby preventing gas and oxide impurities from remaining in the molded part and forming pores and defects, thereby ensuring the quality of the molded part. In addition, the lower mold has a second through hole that is connected to the second runner groove. A second movable column that can move up and down in the second through hole is installed in the second through hole. The top surface of this second movable column is flush with the bottom surface of the second flow channel groove, and the lower part of the second movable column has a second flange portion arranged along the circumferential direction. A second cap body is fixedly connected to the lower surface of the lower mold, and the lower end of the second movable column is embedded in the second cap body. A second elastic component is sleeved on the second movable column and is located between the lower surface of the second flange portion and the second cap body. Through the arrangement of the second movable column and the second elastic component, a pressure buffer zone can be provided when the die-casting liquid enters the mold, and then reverse pressure is applied to the part during the part molding process, so as to overcome the molding defects of the front end of the part caused by insufficient pressure due to the front end of the part being too far away from the die-casting liquid inlet, thereby further improving the quality of the part after molding.

[0015] 3. The die-casting molding system of the metal part of the present invention has a third through hole connected to the diverter groove on its diverter cone, and a third movable column that can move up and down in the third through hole is installed in the third through hole, and the top surface of the third movable column is flush with the bottom surface of the diverter groove, and the lower part of the third movable column has a third flange portion arranged along the circumferential direction, and a third cap body is fixedly connected to the lower surface of the diverter cone, and the lower end of the third movable column is embedded in the third cap body. A third elastic component is mounted on the third movable column and is located between the lower surface of the third flange portion and the third cap body. Through the arrangement of the third movable column and the third elastic component, the pressure of the die-casting liquid entering the diverter cone can be monitored by the deformation of the elastic component, thereby avoiding the problem of mold cracking and failure caused by excessive pressure when the die-casting liquid enters the mold, thereby extending the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the die-casting system for metal parts of the present invention;

[0017] Figure 2 Schematic diagram of the structural decomposition of the die-casting system for metal parts of the present invention Figure 1 ;

[0018] Figure 3 Schematic diagram of the structural decomposition of the die-casting system for metal parts of the present invention Figure 2 ;

[0019] Figure 4 A cross-sectional view of a die-casting system for a metal part according to the present invention;

[0020] Figure 5 A cross-sectional view of a local structure of a die-casting molding system for a metal part of the present invention in an unstressed state;

[0021] Figure 6 It is a cross-sectional view of the local structure of the die-casting molding system of the metal part of the present invention under stress state.

[0022] In the above drawings: 1. cavity; 2. upper mold; 3. core; 4. lower mold; 5. diverter cone; 501. diverter groove; 502. guide groove; 6. gate sleeve; 7. first runner groove; 8. recessed portion; 9. first through hole; 10. first movable column; 11. first flange portion; 12. first cap body; 13. elastic component; 14. second runner groove; 15. second through hole; 16. second movable column; 17. second flange portion; 18. second cap body; 19. second elastic component; 21. third through hole; 22. third movable column; 23. third flange portion; 24. third cap body; 25. third elastic component; 26. bump; 27. groove. DETAILED DESCRIPTION

[0023] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, for example, to mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this patent in specific circumstances.

[0024] Example 1: A die-casting system for metal parts, comprising an upper die 2 having a cavity 1, a lower die 4 having a core 3, a diverter cone 5 connected to one end of the lower die 4, and a sprue bushing 6 connected to the diverter cone 5. The upper opening of the sprue bushing 6 is connected to the die-casting machine, and the lower end of the sprue bushing 6 is connected to the diverter cone 5. A first runner groove 7 is provided on the upper surface of the lower die 4, located between the core 3 and the diverter cone 5. The first runner groove 7 is connected to the gap formed between the cavity 1 and the core 3.

[0025] The core 3 has a recessed portion 8 at the center of its upper surface. The core 3 also has a first through hole 9 that penetrates the recessed portion 8. A first movable column 10 that can move up and down in the first through hole 9 is installed in the first through hole 9. The upper surface of the first movable column 10 is flush with the bottom surface of the recessed portion 8. The lower part of the first movable column 10 has a first flange portion 11 arranged in the circumferential direction. A first cap body 12 is fixedly connected to the lower surface of the lower mold 4. The lower end of the first movable column 10 is embedded in the first cap body 12. An elastic component 13 is mounted on the first movable column 10 and is located between the lower surface of the first flange portion 11 and the first cap body 12.

[0026] A second runner groove 14 is provided on the upper surface of the core 3 and located on the side of the core 3 opposite to the diverter cone 5. The second runner groove 14 is connected to the gap formed between the cavity 1 and the core 3. A second through hole 15 that is connected to the second runner groove 14 is provided on the lower mold 4. A second movable column 16 that can move up and down in the second through hole 15 is installed in the second through hole 15. The top surface of the second movable column 16 is flush with the bottom surface of the second runner groove 14. The lower part of the second movable column 16 has a second flange portion 17 arranged along the circumferential direction. A second cap body 18 is fixedly connected to the lower surface of the lower mold 4. The lower end of the second movable column 16 is embedded in the second cap body 18. A second elastic component 19 is mounted on the second movable column 16 and is located between the lower surface of the second flange portion 17 and the second cap body 18.

[0027] The diverter cone 5 has a diverter groove 501 in the middle of the upper surface, and a guide groove 502 for connecting the diverter groove 501 with the first flow channel groove 7 is also provided on the upper surface of the diverter cone 5. The diverter cone 5 also has a third through hole 21 connected to the diverter groove 501, and a third movable column 22 that can move up and down in the third through hole 21 is installed in the third through hole 21. The top surface of the third movable column 22 is flush with the bottom surface of the diverter groove 501, and the lower part of the third movable column 22 has a third flange portion 23 arranged along the circumferential direction. A third cap body 24 is fixedly connected to the lower surface of the diverter cone 5, and the lower end of the third movable column 22 is embedded in the third cap body 24. A third elastic component 25 is mounted on the third movable column 22 and is located between the lower surface of the third flange portion 23 and the third cap body 24.

[0028] The elastic component 13 is a spring; at least two corners of the upper surface of the lower mold 4 are provided with a protrusion 26, and the lower surface of the upper mold 2 is provided with a plurality of grooves 27 corresponding to the protrusions 26; the number of the protrusions 26 and the grooves 27 are four, respectively located at the four corners of the lower mold 4 and the upper mold 2.

[0029] Example 2: A die-casting system for metal parts, comprising an upper die 2 having a cavity 1, a lower die 4 having a core 3, a diverter cone 5 connected to one end of the lower die 4, and a sprue bushing 6 connected to the diverter cone 5. The upper opening of the sprue bushing 6 is connected to the die-casting machine, and the lower end of the sprue bushing 6 is connected to the diverter cone 5. A first runner groove 7 is provided on the upper surface of the lower die 4, located between the core 3 and the diverter cone 5. The first runner groove 7 is connected to the gap formed between the cavity 1 and the core 3.

[0030] The core 3 has a recessed portion 8 at the center of its upper surface. The core 3 also has a first through hole 9 that penetrates the recessed portion 8. A first movable column 10 that can move up and down in the first through hole 9 is installed in the first through hole 9. The upper surface of the first movable column 10 is flush with the bottom surface of the recessed portion 8. The lower part of the first movable column 10 has a first flange portion 11 arranged in the circumferential direction. A first cap body 12 is fixedly connected to the lower surface of the lower mold 4. The lower end of the first movable column 10 is embedded in the first cap body 12. An elastic component 13 is mounted on the first movable column 10 and is located between the lower surface of the first flange portion 11 and the first cap body 12.

[0031] A second runner groove 14 is provided on the upper surface of the core 3 and located on the side of the core 3 opposite to the diverter cone 5. The second runner groove 14 is connected to the gap formed between the cavity 1 and the core 3. A second through hole 15 that is connected to the second runner groove 14 is provided on the lower mold 4. A second movable column 16 that can move up and down in the second through hole 15 is installed in the second through hole 15. The top surface of the second movable column 16 is flush with the bottom surface of the second runner groove 14. The lower part of the second movable column 16 has a second flange portion 17 arranged along the circumferential direction. A second cap body 18 is fixedly connected to the lower surface of the lower mold 4. The lower end of the second movable column 16 is embedded in the second cap body 18. A second elastic component 19 is mounted on the second movable column 16 and is located between the lower surface of the second flange portion 17 and the second cap body 18.

[0032] The diverter cone 5 has a diverter groove 501 in the middle of the upper surface, and a guide groove 502 for connecting the diverter groove 501 with the first flow channel groove 7 is also provided on the upper surface of the diverter cone 5. The diverter cone 5 also has a third through hole 21 connected to the diverter groove 501, and a third movable column 22 that can move up and down in the third through hole 21 is installed in the third through hole 21. The top surface of the third movable column 22 is flush with the bottom surface of the diverter groove 501, and the lower part of the third movable column 22 has a third flange portion 23 arranged along the circumferential direction. A third cap body 24 is fixedly connected to the lower surface of the diverter cone 5, and the lower end of the third movable column 22 is embedded in the third cap body 24. A third elastic component 25 is mounted on the third movable column 22 and is located between the lower surface of the third flange portion 23 and the third cap body 24.

[0033] The elastic component 13 is formed by a plurality of spring sheets stacked in an interlaced manner; the upper opening of the sprue sleeve 6 is connected to the injection structure of the die-casting machine.

[0034] When the above-mentioned die-casting molding system for metal parts is used, the movable column and the elastic component are arranged to provide a pressure buffer when the die-casting liquid enters the mold, thereby applying reverse pressure to the part during the molding process, providing continuous pressure to the locally thicker part area, and avoiding the situation where the externally applied pressure cannot act on the locally thicker part area after the surrounding area of ​​the locally thicker part is molded first, resulting in a lack of pressure in the local part area, which affects the molding speed, effect and accuracy;

[0035] In addition, the setting of the second runner groove provides a molding buffer space to ensure balanced and stable pressure. At the same time, it can remove the gas and oxide inclusions in the mold cavity that have not been discharged in time and enter the molten metal, and finally form slag in the second runner groove to remove them. This prevents gas and oxide impurities from remaining in the molded parts and forming pores and defects, thereby ensuring the quality of the molded parts.

[0036] In addition, the second movable column and the second elastic component provide a pressure buffer when the die-casting liquid enters the mold, thereby applying reverse pressure to the part during the molding process. This overcomes the problem of insufficient pressure at the front end of the part due to the front end being too far from the die-casting liquid inlet, which can lead to molding defects at the front end of the part, further improving the quality of the molded part.

[0037] In addition, through the setting of the third movable column and the third elastic component, the pressure of the die-casting liquid entering the diverter cone can be monitored by the deformation of the elastic component, thereby avoiding the problem of mold cracking and failure caused by excessive pressure when the die-casting liquid enters the mold, and extending the service life of the mold.

[0038] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A die-casting system for metal parts, characterized in that: The present invention comprises an upper mold (2) having a mold cavity (1), a lower mold (4) having a mold core (3), a diverter cone (5) connected to one end of the lower mold (4), and a gate sleeve (6) connected to the diverter cone (5), wherein the upper end opening of the gate sleeve (6) is connected to the injection structure of the die-casting machine, and the lower end of the gate sleeve (6) is connected to the diverter cone (5). A first runner groove (7) is provided on the upper surface of the lower mold (4) and is located between the mold core (3) and the diverter cone (5), and the first runner groove (7) is connected to the gap formed between the mold cavity (1) and the mold core (3); The core (3) has a recessed portion (8) at the center of its upper surface. The core (3) also has a first through hole (9) that penetrates the recessed portion (8). A first movable column (10) that can move up and down in the first through hole (9) is installed in the first through hole (9). The upper surface of the first movable column (10) is flush with the bottom surface of the recessed portion (8). The lower part of the first movable column (10) has a first flange portion (11) arranged along the circumferential direction. A first cap body (12) is fixedly connected to the lower surface of the lower mold (4). The lower end of the first movable column (10) is embedded in the first cap body (12). An elastic component (13) is mounted on the first movable column (10) and is located between the lower surface of the first flange portion (11) and the first cap body (12). The elastic component (13) is formed by a plurality of spring sheets that are staggered and stacked. A second flow channel groove (14) is formed on the upper surface of the core (3) and on the side of the core (3) opposite to the diverter cone (5). The second flow channel groove (14) is connected to the gap formed between the cavity (1) and the core (3). A second through hole (15) is formed on the lower mold (4) and is connected to the second flow channel groove (14). A second movable column (16) that can move up and down in the second through hole (15) is installed in the second through hole (15). The second movable column ( The top surface of the second movable column (16) is flush with the bottom surface of the second flow channel (14), the lower part of the second movable column (16) has a second flange portion (17) arranged along the circumferential direction, a second cap body (18) is fixedly connected to the lower surface of the lower mold (4), the lower end of the second movable column (16) is embedded in the second cap body (18), and a second elastic component (19) is sleeved on the second movable column (16) and is located between the lower surface of the second flange portion (17) and the second cap body (18); The diverter cone (5) has a diverter groove (501) in the middle of the upper surface, and a guide groove (502) for connecting the diverter groove (501) and the first flow channel groove (7) is also formed on the upper surface of the diverter cone (5). The diverter cone (5) also has a third through hole (21) connected to the diverter groove (501). A third movable column (22) is installed in the third through hole (21) and can move up and down in the third through hole (21). The third movable column (22) The top surface of the third movable column (22) is flush with the bottom surface of the diverter groove (501), the lower part of the third movable column (22) has a third flange portion (23) arranged along the circumferential direction, and a third cap body (24) is fixedly connected to the lower surface of the diverter cone (5), and the lower end of the third movable column (22) is embedded in the third cap body (24). A third elastic component (25) is mounted on the third movable column (22) and is located between the lower surface of the third flange portion (23) and the third cap body (24).

2. The die-casting system for metal parts according to claim 1, characterized in that: At least two corners of the upper surface of the lower mold (4) are provided with a protrusion (26).

3. The die-casting system for metal parts according to claim 2, characterized in that: A plurality of grooves (27) corresponding to the protrusions (26) are provided on the lower surface of the upper mold (2).

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