Compact forming die for die casting

Abstract

The utility model discloses a die-casting piece compactness forming die, which relates to the technical field of die-casting forming, and comprises an upper die and a lower die, the bottom of the lower die is provided with a liquid injection channel communicated with a liquid injection port, the liquid injection channel is of a right-angle structure, and the lower end of the liquid injection channel is communicated with a liquid injection pipe; the upper mold is provided with an exhaust port which is communicated with the cavity and is used for exhausting gas in a pouring solution in the cavity, and an exhaust plug arranged in the exhaust port; swing motors are symmetrically arranged on the two sides of the upper die and the two sides of the lower die, rotating shafts are arranged at the output ends of the swing motors, and hammering balls attached to the outer walls of the upper die and the lower die are arranged on the outer walls of the rotating shafts through connecting rods. The swing motor is started, the rotating shaft drives the connecting rod to rotate, the hammering ball knocks the upper die and the lower die, materials in the cavity are vibrated, bubbles in the materials are easily vibrated out, and bubbles are prevented from being generated in a product.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting, in particular to a compact forming die for die castings. Background Art

[0002] As the requirements for lightweight electronic products become increasingly higher, complex thin-walled housings are increasingly used in electronic product components. In particular, lightweight materials such as magnesium, aluminum, and titanium have low density and light weight, making such light alloy complex thin-walled housings have unique advantages in lightweighting components. Therefore, the die-casting process is often used to produce thin-walled components of electronic products. The die-casting process usually includes four steps: mold preparation, filling, injection, and sand dropping.

[0003] There is air in the cavity of the existing die-casting mold, and the mold cavity is often insufficiently filled during the casting process. The retained air is compressed to form high-temperature compressed air, which can easily affect the surface of the casting after cooling. Therefore, the castings after die-casting generally have problems of air holes and shrinkage holes; at the same time, some bubbles inside the cavity material cannot actively flow to the exhaust groove or exhaust plug, and remain inside the material, affecting the quality of the product. Utility Model Content

[0004] The purpose of the utility model is to provide a compact forming die for die castings, which is easy to discharge some bubbles inside the cavity machine and the cavity material, thereby improving the quality of the product and enhancing the practical performance of the die.

[0005] To achieve the above-mentioned object, the utility model provides the following technical solutions: a die-casting compact forming mold, comprising an upper mold and a lower mold, the lower surface of the upper mold being provided with a first molding surface which is inwardly recessed relative to the parting surface of the lower mold, the upper surface of the lower mold being provided with a second molding surface corresponding to the first molding surface, the first molding surface and the second molding surface forming a cavity for casting a casting solution into a die-casting when the upper mold and the lower mold are closed; a liquid injection port communicating with the mold cavity is provided at the center of the lower mold interlayer, a sealing plug which can move axially is provided in the liquid injection port, a first electric telescopic rod fixedly connected to the bottom of the sealing plug is provided at the bottom of the lower mold; a liquid injection channel communicating with the liquid injection port is provided at the bottom of the lower mold, and the liquid injection channel is a right-angled structure, and the lower end of the liquid injection channel is connected with a liquid injection pipe; an exhaust port communicating with the mold cavity and used for discharging gas in the casting solution inside the mold cavity is provided on the upper mold, and an exhaust plug is provided in the exhaust port;

[0006] The upper and lower molds are symmetrically provided with swing motors, the output end of the swing motor is provided with a rotating shaft, and the outer wall of the rotating shaft is provided with a hammer ball that is in contact with the outer wall of the upper and lower molds through a connecting rod.

[0007] In order to easily fix the lower mold and the swing motor, as a preferred die-casting compact forming mold of the present invention, a bracket is provided at the bottom of the lower mold and the swing motor; a through groove is provided at the top of the bracket, and the injection pipe and the first electric telescopic rod are both located in the through groove.

[0008] In order to facilitate automatic delivery of injection molding liquid, as a preferred die-casting compact forming mold of the utility model, a heated injection molding liquid tank, a delivery pump, and a solenoid valve are arranged under the bracket; the heated injection molding liquid tank is connected to the other end of the injection pipe through the delivery pump, and the solenoid valve is arranged on the injection pipe. A controller is provided on the bracket, and the controller is electrically connected to the solenoid valve, the delivery pump, and the first electric telescopic rod respectively.

[0009] In order to prevent the injection liquid from cooling and solidifying, as a preferred die-casting compact forming mold of the present invention, electric heating plates are provided inside the interlayer of the upper mold and the lower mold, and heating layers are provided on the inner walls of the injection port and the injection channel and inside the interlayer of the injection tube.

[0010] In order to facilitate automatic opening or closing of the upper mold, as a preferred die-casting compact forming mold of the present invention, the front and rear sides of the rotating shaft are symmetrically provided with connecting seats fixedly connected to the outer wall of the upper mold, and the top of the bracket is provided with a lifting device fixedly connected to the bottom of the connecting seat.

[0011] In order to avoid misalignment of the upper mold, as a preferred die-casting compact forming mold of the present invention, a guide rod is provided on the side of the lower mold facing the upper mold, and a guide hole adapted to the guide rod is provided on the side of the lower mold facing the upper mold, and the lower end of the guide rod is inserted into the guide hole.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The injection liquid of the utility model is transported into the mold cavity through the injection pipe, the injection channel, and the injection port. The injection liquid is transported from the bottom of the mold cavity, which makes it easy for the injection liquid to push the air inside the mold cavity upward. When the injection liquid fills the mold cavity, the air in the mold cavity is located at the top, and it is easy for the air to be discharged from the mold cavity through the exhaust plug in the exhaust port, thereby reducing the air inside the mold cavity, facilitating exhaust, and improving the quality of the product, avoiding the problems of pores and shrinkage holes on the surface of the casting after cooling.

[0014] 2. The utility model starts the swing motor, and the shaft drives the connecting rod to rotate, so that the hammer ball hits the upper mold and the lower mold, causing the material inside the cavity to vibrate, which is easy to shake out the bubbles inside the material and avoid the generation of bubbles inside the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the swing motor of the utility model;

[0017] Figure 3 for Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0018] In the figure: 1. Upper mold; 2. Lower mold; 3. First molding surface; 4. Second molding surface; 5. Cavity; 6. Liquid injection port; 7. Sealing plug; 8. First electric telescopic rod; 9. Liquid injection channel; 10. Liquid injection pipe; 11. Exhaust port; 12. Exhaust plug; 13. Swing motor; 14. Rotating shaft; 15. Connecting rod; 16. Hammer ball; 17. Bracket; 18. Through groove; 19. Heating injection liquid tank; 20. Delivery pump; 21. Solenoid valve; 22. Controller; 23. Electric heating plate; 24. Heating layer; 25. Connecting seat; 26. Lifting device; 27. Guide rod; 28. Guide hole. DETAILED DESCRIPTION

[0019] See also Figures 1 to 3 , a die-casting compact forming mold, comprising an upper mold 1 and a lower mold 2, the lower surface of the upper mold 1 is provided with a first molding surface 3 which is inwardly recessed relative to the parting surface of the lower mold 2, the upper surface of the lower mold 2 is provided with a second molding surface 4 corresponding to the first molding surface 3, the first molding surface 3 and the second molding surface 4 form a cavity 5 for making a die-casting part from a casting solution when the upper mold 1 and the lower mold 2 are closed; a liquid injection port 6 communicating with the cavity 5 is provided at the center of the interlayer of the lower mold 2, a sealing plug 7 which can move axially is provided in the liquid injection port 6, a first electric telescopic rod 8 fixedly connected to the bottom of the sealing plug 7 is provided at the bottom of the lower mold 2; a liquid injection channel 9 communicating with the liquid injection port 6 is provided at the bottom of the lower mold 2, and the liquid injection channel 9 is a right-angled structure, and the lower end of the liquid injection channel 9 is connected with an injection pipe 10; an exhaust port 11 communicating with the cavity 5 and for discharging gas in the casting solution inside the cavity 5, and an exhaust plug 12 provided in the exhaust port 11;

[0020] A swing motor 13 is symmetrically provided on both sides of the upper mold 1 and the lower mold 2. A rotating shaft 14 is provided at the output end of the swing motor 13. A hammer ball 16 is provided on the outer wall of the rotating shaft 14 through a connecting rod 15 to contact the outer walls of the upper mold 1 and the lower mold 2.

[0021] In this embodiment: the upper mold 1 is installed on the lower mold 2, and a closed mold cavity 5 is formed between the first molding surface 3 and the second molding surface 4; the first electric telescopic rod 8 is started to move the sealing plug 7 downward, so that the injection port 6 and the mold cavity 5 are connected, and the injection liquid is transported to the injection channel 9 through the injection pipe 10. The injection liquid enters the mold cavity 5 through the injection channel and the injection port 6. The injection liquid is transported from the bottom of the mold cavity 5, which makes it easy for the injection liquid to push the air inside the mold cavity 5 upward. When the injection liquid fills the mold cavity 5, the air in the mold cavity 5 is located at the top and is discharged from the mold cavity 5 through the exhaust plug 12 in the exhaust port 11, thereby reducing the air inside the mold cavity 5, facilitating exhaust, improving the quality of the product, and avoiding the problem of pores and shrinkage holes on the surface of the casting after cooling;

[0022] At the same time, during the injection molding process, the swing motor 13 is started, and the rotating shaft 14 drives the connecting rod 15 to rotate, so that the hammer ball 16 strikes the upper mold 1 and the lower mold 2, causing the material inside the cavity 5 to vibrate, which makes it easy to shake out the bubbles inside the material and avoid the formation of bubbles inside the product;

[0023] The hammer ball 16 of the utility model is made of rubber.

[0024] As a technical optimization solution of the present invention, a bracket 17 is provided at the bottom of the lower mold 2 and the swing motor 13; a through slot 18 is opened at the top of the bracket 17, and the injection tube 10 and the first electric telescopic rod 8 are both located in the through slot 18.

[0025] In this embodiment, the bracket 17 is easy to fix the lower mold 2 and the swing motor 13, and the through groove 18 prevents the liquid injection tube 10 and the first electric telescopic rod 8 from contacting the bracket 17.

[0026] As a technical optimization solution of the present invention, a heated injection liquid tank 19, a delivery pump 20, and a solenoid valve 21 are provided below the bracket 17; the heated injection liquid tank 19 is connected to the other end of the injection pipe 10 through the delivery pump 20, the solenoid valve 21 is provided on the injection pipe 10, and a controller 22 is provided on the bracket 17, and the controller 22 is electrically connected to the solenoid valve 21, the delivery pump 20, and the first electric telescopic rod 8 respectively.

[0027] In this embodiment: the controller 22 adopts a single-chip microcomputer controller 22 or a PLC touch screen all-in-one machine, starts the delivery pump 20, and the injection molding liquid in the heated injection molding liquid tank 19 can be automatically delivered to the mold cavity 5 through the injection pipe 10, and the solenoid valve 21 can control the flow rate of the injection molding liquid; it should be noted that the delivery pump 20 should fully consider the characteristics of the injection molding liquid (such as temperature, viscosity, corrosiveness, etc.) and delivery conditions (such as pressure, flow, etc.) to ensure that the pump can meet the delivery requirements.

[0028] As a technical optimization solution of the present invention, electric heating plates 23 are provided inside the interlayer of the upper mold 1 and the lower mold 2, and heating layers 24 are provided on the inner walls of the injection port 6 and the injection channel 9 and inside the interlayer of the injection tube 10.

[0029] In this embodiment, when the molding liquid is injected into the cavity 5 , the electric heating plate 23 and the heating layer 24 both have a heating effect, thereby preventing the molding liquid from cooling and improving the fluidity of the molding liquid.

[0030] As a technical optimization solution of the present invention, connecting seats 25 fixedly connected to the outer wall of the upper mold 2 are symmetrically arranged on the front and rear sides of the rotating shaft 14, and a lifting device 26 fixedly connected to the bottom of the connecting seat 25 is arranged on the top of the bracket 17.

[0031] In this embodiment, the lifting device 26 adopts a pneumatic telescopic rod or a hydraulic telescopic rod. When the lifting device 26 is started, the upper mold 1 can move up and down, and the upper mold 1 can be opened or closed automatically.

[0032] As a technical optimization solution of the present invention, a guide rod 27 is provided on the side of the lower mold 2 facing the upper mold 1, and a guide hole 28 adapted to the guide rod 27 is provided on the side of the lower mold 2 facing the upper mold 1, and the lower end of the guide rod 27 is inserted into the guide hole 28.

[0033] In this embodiment, when the lower mold 2 moves downward, the guide rod 27 is inserted into the guide hole 28, which makes it easy to restrict the upper mold 1 and avoid dislocation of the upper mold 1.

[0034] Working principle: Start the lifting device 26 to automatically drive the upper mold 1 to move to the lower mold 2; start the first electric telescopic rod 8 to move the sealing plug 7 downward, so that the injection port 6 and the cavity 5 are connected; start the delivery pump 20 to transport the injection liquid in the heated injection liquid tank 19 into the cavity 5 through the injection pipe 10, the injection channel, and the injection port 6. The injection liquid is transported from the bottom of the cavity 5, which makes it easy for the injection liquid to push the air inside the cavity 5 upward. When the injection liquid fills the cavity 5, the air in the cavity 5 is located at the top and is discharged from the cavity 5 through the exhaust plug 12 in the exhaust port 11, reducing the air inside the cavity 5, facilitating exhaust, and improving the quality of the product, avoiding the problem of pores and shrinkage cavities on the surface of the casting after cooling; at the same time, during the injection molding process, start the swing motor 13, and the rotating shaft 14 drives the connecting rod 15 to rotate, so that the hammer ball 16 knocks on the upper mold 1 and the lower mold 2, causing the material inside the cavity 5 to vibrate, making it easy to shake out the bubbles inside the material and avoiding the generation of bubbles inside the product.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A die-casting compact forming die, comprising an upper die (1) and a lower die (2), wherein the lower surface of the upper die (1) is provided with a first forming surface (3) which is recessed inward relative to the parting surface of the lower die (2), and the upper surface of the lower die (2) is provided with a second forming surface (4) corresponding to the first forming surface (3), wherein the first forming surface (3) and the second forming surface (4) form a cavity (5) for producing a die-casting from a casting solution when the upper die (1) and the lower die (2) are clamped together; and characterized in that: A liquid injection port (6) communicating with the mold cavity (5) is provided at the center of the interlayer of the lower mold (2), a sealing plug (7) capable of axial movement is provided in the liquid injection port (6), and a first electric telescopic rod (8) fixedly connected to the bottom of the sealing plug (7) is provided at the bottom of the lower mold (2); a liquid injection channel (9) communicating with the liquid injection port (6) is provided at the bottom of the lower mold (2), and the liquid injection channel (9) is a right-angled structure, and the lower end of the liquid injection channel (9) is connected to the liquid injection pipe (10); the upper mold (1) is provided with an exhaust port (11) communicating with the mold cavity (5) and used for discharging gas in the casting solution inside the mold cavity (5), and an exhaust plug (12) provided in the exhaust port (11); A swing motor (13) is symmetrically provided on both sides of the upper mold (1) and the lower mold (2); a rotating shaft (14) is provided at the output end of the swing motor (13); and a hammer ball (16) is provided on the outer wall of the rotating shaft (14) through a connecting rod (15) and is in contact with the outer walls of the upper mold (1) and the lower mold (2).

2. The die casting compaction forming die according to claim 1, characterized in that: A bracket (17) is provided at the bottom of the lower mold (2) and the swing motor (13); a through slot (18) is provided at the top of the bracket (17), and the injection pipe (10) and the first electric telescopic rod (8) are both located in the through slot (18).

3. The die casting compaction forming die according to claim 2, characterized in that: A heating injection liquid tank (19), a delivery pump (20), and a solenoid valve (21) are provided below the bracket (17); the heating injection liquid tank (19) is connected to the other end of the injection pipe (10) through the delivery pump (20); the solenoid valve (21) is provided on the injection pipe (10); a controller (22) is provided on the bracket (17); and the controller (22) is electrically connected to the solenoid valve (21), the delivery pump (20), and the first electric telescopic rod (8) respectively.

4. The die casting compaction forming die according to claim 1, characterized in that: Electric heating plates (23) are provided inside the interlayers of the upper mold (1) and the lower mold (2), and heating layers (24) are provided on the inner walls of the injection port (6) and the injection channel (9) as well as inside the interlayer of the injection pipe (10).

5. The die casting compaction forming die according to claim 2, characterized in that: Connecting seats (25) fixedly connected to the outer wall of the upper mold (1) are symmetrically provided on the front and rear sides of the rotating shaft (14), and a lifting device (26) fixedly connected to the bottom of the connecting seat (25) is provided on the top of the bracket (17).

6. The die casting compacting mold according to claim 1, characterized in that: A guide rod (27) is provided on the side of the lower die (2) facing the upper die (1), and a guide hole (28) adapted to the guide rod (27) is provided on the side of the lower die (2) facing the upper die (1), and the lower end of the guide rod (27) is inserted into the guide hole (28).

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