Injection punch device of die casting machine

Abstract

The utility model relates to an injection punch device of a die-casting machine, which comprises an injection punch (1) and an injection rod (2), the injection punch (1) is cylindrical, the side wall of the injection punch (1) is provided with an annular sealing ring (3), one end of the injection rod (2) is fixedly connected with the rear end of the injection punch (1), and the other end of the injection rod (2) is used for being fixedly connected with an injection device of the die-casting machine. According to the utility model, the annular sealing ring (3) is arranged on the side wall of the injection punch (1), and the gap between the injection punch (1) and the pressure chamber can be sealed through the sealing ring (3), so that the situation that gas or other impurities enter the gap when the pressure chamber is vacuumized, the vacuumizing effect is poor, and the quality of a die casting is influenced is prevented.

Description

Technical Field

[0001] This utility model relates to the injection punch device of a die casting machine, and more particularly to the structure of the injection punch device of a die casting machine. Background Technology

[0002] Die casting machines are equipment used to produce die castings, such as... Figure 5 As shown, the die casting machine 4 includes a die casting mold 41 and an injection mechanism 42. The die casting mold 41 consists of a movable mold 411 and a fixed mold 412 that can be opened and closed. When the fixed mold 411 and the movable mold 412 are closed, they form a cavity. The injection mechanism 42 includes an injection punch, a hydraulic device 421 and a pressure chamber 422. The injection punch can slide in the pressure chamber 422 and its rear end is connected to the hydraulic device 421. The pressure chamber 422 is connected to the cavity. During operation, the molten metal is first placed into the pressure chamber 422, and then the hydraulic device 421 pushes the injection punch to press the molten metal from the pressure chamber 422 into the cavity, and maintains a certain pressure until the die casting is formed.

[0003] As a critical component, the stability and precision of the injection punch directly affect the quality of the die-cast parts. For example, molten metal entering the pressure chamber may contain moisture, which, after heating in the barrel, generates gas. This can lead to air entrapment and turbulence during filling the mold cavity, creating porosity within the die-cast part and reducing its performance. Therefore, before injecting molten metal into the mold cavity, it is necessary to evacuate the gas in the pressure chamber.

[0004] However, due to the gap between the die-casting punch and the pressure chamber, the die-casting punch wears down over a long period of use, which increases the gap between the die-casting punch and the pressure chamber. This results in poor sealing between the die-casting punch and the pressure chamber. When the pressure chamber is evacuated, gas or other impurities will enter the gap, resulting in poor evacuation effect and ultimately affecting the quality of the die-cast parts.

[0005] In addition, due to prolonged exposure to high temperatures, the lifespan of the injection punch is relatively short. Current methods typically involve creating a heat dissipation cavity inside the injection punch and circulating cooling water into it to cool it down. This method can quickly and effectively cool the injection punch, but the heat dissipation cavity reduces the strength of the injection punch, affecting its lifespan.

[0006] The primary objective of this invention is to solve the problem of poor sealing of the injection punch and pressure chamber in existing die-casting machines, which affects the quality of die-cast parts.

[0007] The second objective is to address the issue that opening a cooling chamber in the injection punch to reduce temperature affects the strength and lifespan of the injection punch. Utility Model Content

[0008] To solve the above problems, this utility model provides an injection punch device for a die casting machine, including an injection punch 1 and an injection rod 2. The injection punch 1 is cylindrical, and an annular sealing ring 3 is provided on the side wall of the injection punch 1. One end of the injection rod 2 is fixedly connected to the rear end of the injection punch 1, and the other end is used to be fixedly connected to the injection device of the die casting machine.

[0009] This invention features an annular sealing ring 3 on the side wall of the injection punch 1. The sealing ring 3 seals the gap between the injection punch 1 and the pressure chamber, preventing gas or other impurities from entering the gap during vacuuming of the pressure chamber, which would result in poor vacuuming and affect the quality of the die-cast parts.

[0010] Preferably, an annular sealing groove 11 is provided on the side wall of the injection punch 1, and the sealing ring 3 is fixedly disposed in the sealing groove 11. Providing a sealing groove 11 on the side wall of the injection punch 1 and disposing of the sealing ring 3 in the sealing groove 11 can improve the firmness of the installation of the sealing ring 3.

[0011] Preferably, the cross-section of the sealing groove 11 is an inverted T-shape, and the cross-section of the sealing strip is an inverted T-shape corresponding to the cross-section of the sealing groove 11. Setting the cross-sections of the sealing groove 11 and the sealing strip to be inverted T-shapes can further improve the firmness of the sealing ring 3 installation and prevent the sealing ring 3 from falling off under high temperature friction.

[0012] Preferably, two sealing rings 3 are provided, located on the side wall near the front and rear ends of the injection punch 1. Providing sealing rings 3 near the front and rear ends of the injection punch 1 can further improve the sealing effect between the injection punch 1 and the pressure chamber.

[0013] Preferably, the injection punch 1 is provided with a cooling channel 12, and the cooling channel 12 forms a cooling inlet 13 and a cooling outlet 14 at the rear end of the injection punch 1. The injection rod 2 is provided with a water inlet 21 and a water outlet 22. One end of the water inlet 21 forms a water inlet 23 on the side wall of the injection rod 2, and the other end extends to the front end of the injection rod 2 and communicates with the cooling inlet 13. One end of the water outlet 22 forms a water outlet 24 on the side wall of the injection rod 2, and the other end extends to the front end of the injection rod 2 and communicates with the cooling outlet 14.

[0014] By setting a cooling channel 12 inside the injection punch and setting an inlet hole 21 and an outlet hole 22 on the injection rod 2 to connect the cooling channel 12, cooling water can enter the cooling channel 12 from the inlet hole 21, cool the injection punch 1 and then discharge it from the outlet hole 22. This can dissipate heat from the injection punch 1 while ensuring its strength.

[0015] Preferably, the cooling channel 12 is spiral-shaped. The spiral shape of the cooling channel 12 increases the heat dissipation area of ​​the compression punch and improves heat dissipation efficiency.

[0016] Preferably, the injection punch 1 and the injection rod 2 are fixedly connected by threads. The threaded connection between the injection punch 1 and the injection rod 2 facilitates the disassembly, maintenance, and replacement of the injection punch 1. Attached Figure Description

[0017] Figure 1 Schematic diagram of the overall structure of the injection punch device of the die casting machine;

[0018] Figure 2 A cross-sectional schematic diagram of the injection punch device of a die-casting machine;

[0019] Figure 3 . Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 . Figure 2 Schematic diagram of the BB cross section;

[0021] Figure 5 A schematic diagram showing the operating status of the injection punch device of a die-casting machine.

[0022] In the diagram, 1. Injection punch, 11. Sealing groove, 12. Cooling channel, 13. Cooling inlet, 14. Cooling outlet, 2. Injection rod, 21. Water inlet, 22. Water outlet, 23. Water inlet, 24. Water outlet, 3. Sealing ring, 4. Die casting machine, 41. Die casting mold, 411. Moving mold, 412. Fixed mold, 42. Injection mechanism, 421. Hydraulic device, 422. Pressure chamber. Detailed Implementation

[0023] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, the injection punch device of the die casting machine includes an injection punch 1 and an injection rod 2. The injection punch 1 is cylindrical, and two annular sealing rings 3 are provided on the side wall of the injection punch 1. (Refer to...) Figure 4 .

[0025] The sealing ring 3 can seal the gap between the injection punch 1 and the pressure chamber, preventing gas or other impurities from entering the gap when the pressure chamber is evacuated, which would result in poor evacuation and affect the quality of the die casting.

[0026] An annular sealing groove 11 is provided on the side wall of the injection punch 1 near its front and rear ends. The cross-section of the sealing groove 11 is inverted T-shaped. The cross-section of the sealing strip is an inverted T-shaped corresponding to the cross-section of the sealing groove 11. Two sealing rings 3 are respectively fixedly installed in the two sealing grooves 11. Figure 3 .

[0027] A sealing groove 11 is provided on the side wall of the injection punch 1, and the sealing ring 3 is placed in the sealing groove 11, which can improve the firmness of the installation of the sealing ring 3. Setting the sealing ring 3 near the front and rear ends of the injection punch 1 can further improve the sealing effect between the injection punch 1 and the pressure chamber.

[0028] The injection punch 1 is provided with a cooling channel 12, which is spiral in shape. The cooling channel 12 forms a cooling inlet 13 and a cooling outlet 14 at the rear end of the injection punch 1.

[0029] The injection rod 2 is provided with a water inlet 21 and a water outlet 22. One end of the water inlet 21 forms a water inlet 23 on the side wall of the injection rod 2, and the other end extends to the front end of the injection rod 2 and communicates with the cooling inlet 13. One end of the water outlet 22 forms a water outlet 24 on the side wall of the injection rod 2, and the other end extends to the front end of the injection rod 2 and communicates with the cooling outlet 14.

[0030] The front end of the injection rod 2 is fixedly connected to the rear end of the injection punch 1 by a thread. The rear end is used to fix the injection device of the die-casting machine, for example, by welding. Setting the injection punch 1 and the injection rod 2 by a thread allows for easy disassembly of the injection punch 1 for inspection and replacement.

[0031] By setting a cooling channel 12 inside the injection punch, the injection punch 1 can be cooled while ensuring its strength. The cooling channel 12 is spiral-shaped, which can increase the heat dissipation area of ​​the compression punch and improve the heat dissipation efficiency.

[0032] This invention features an annular sealing ring 3 on the side wall of the injection punch 1. The sealing ring 3 seals the gap between the injection punch 1 and the pressure chamber, preventing gas or other impurities from entering the gap during vacuuming of the pressure chamber, which would result in poor vacuuming and affect the quality of the die-cast parts.

[0033] By setting a sealing groove 11 on the side wall of the injection punch 1 and placing the sealing ring 3 inside the sealing groove 11, the firmness of the sealing ring 3 installation can be improved. Setting the cross-section of the sealing groove 11 and the sealing strip to be inverted T-shaped can further improve the firmness of the sealing ring 3 installation and prevent the sealing ring 3 from falling off under high temperature friction.

[0034] By providing a cooling channel 12 inside the injection punch and an inlet hole 21 and an outlet hole 22 on the injection rod 2 that connect to the cooling channel 12, cooling water can enter the cooling channel 12 through the inlet hole 21, cool the injection punch 1, and then exit through the outlet hole 22. This allows for heat dissipation of the injection punch 1 while maintaining its strength. The spiral shape of the cooling channel 12 increases the heat dissipation area of ​​the compression punch, improving heat dissipation efficiency. The threaded connection between the injection punch 1 and the injection rod 2 facilitates disassembly, maintenance, and replacement of the injection punch 1.

[0035] It should be noted that the above embodiments are illustrative of the present invention and not restrictive of the present invention, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims.

Claims

1. The injection punch device for a die-casting machine, characterized in that, It includes a pressure injection punch (1) and a pressure injection rod (2). The injection punch (1) is cylindrical, and an annular sealing ring (3) is provided on the side wall of the injection punch (1). An annular sealing groove (11) is provided on the side wall of the injection punch (1), and the cross-section of the sealing groove (11) is inverted T-shaped; The cross-section of the sealing ring (3) is a single piece, and is an inverted T-shape corresponding to the cross-section of the sealing groove (11). The sealing ring (3) is fixedly installed in the sealing groove (11); Two sealing rings (3) are provided, located on the side wall near the two ends of the injection punch (1); One end of the injection rod (2) is fixedly connected to the rear end of the injection punch (1), and the other end is used to be fixedly connected to the injection device of the die casting machine.

2. The injection punch device for a die-casting machine according to claim 1, characterized in that, The injection punch (1) is provided with a cooling channel (12), and the cooling channel (12) forms a cooling inlet (13) and a cooling outlet (14) at the rear end of the injection punch (1). The injection rod (2) is provided with a water inlet (21) and a water outlet (22). One end of the water inlet (21) forms a water inlet (23) on the side wall of the injection rod (2), and the other end extends to the front end of the injection rod (2) and communicates with the cooling inlet (13). One end of the water outlet (22) forms a water outlet (24) on the side wall of the injection rod (2), and the other end extends to the front end of the injection rod (2) and communicates with the cooling outlet (14).

3. The injection punch device for a die-casting machine according to claim 2, characterized in that, The cooling channel (12) is spiral-shaped.

4. The injection punch device for a die-casting machine according to claim 3, characterized in that, The injection punch (1) and the injection rod (2) are fixedly connected by threads.

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