A metal die cast injection structure

Abstract

The utility model discloses a kind of metal die-casting injection structures, including barrel, feeding mechanism and injection pipe, injection pipe one end is connected barrel from below to above and other end and feeding mechanism connect, feeding mechanism includes feeding area, melting material area, feed area and screw rod feeding mechanism, feeding area upper portion is equipped with feed inlet, feeding area is located melting material area upper side, screw rod feeding mechanism is fixedly connected with feeding area one end;Melting material area includes melting material bucket, agitator is installed in melting material bucket, feeding area one end is communicated with melting material bucket upper portion, feed area one end is connected with melting material bucket side and other end is connected with injection pipe.The utility model is by being arranged in barrel below injection pipe, the mode of forming barrel bottom feeding, not only air residual in barrel can be reduced, but also effectively avoid after stopping feed, slurry in injection pipe enters into barrel.

Description

Technical Field

[0001] This utility model relates to the field of metal forming technology, and more specifically, to a metal die casting injection structure. Background Technology

[0002] With the continuous development of the metal market, customers have increasingly higher requirements for equipment and metal products. Patent CN 118437901 A discloses a cold chamber die-casting injection structure and die-casting machine for semi-solid magnesium alloys. The second barrel module of this patent is located above the injection unit. According to its description... Figure 1 The diagram shows a cross-sectional view of the second barrel module and the injection unit in operation. The second barrel module 200 is located above the feed tube 100 of the injection unit. This design has several drawbacks: First, this feeding method may create a cavity 300 inside the feed tube 100, resulting in residual air inside the feed tube 100. During die casting, this air will be pushed into the mold, affecting the molding of the die casting. Second, when the high-temperature solenoid valve is closed, the slurry between the high-temperature solenoid valve and the lower end of the feed tube 100 will fall into the feed tube 100 due to gravity, making it impossible to stop the feeding in time. Therefore, improvements are urgently needed. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a metal die-casting injection structure. By placing the injection tube below the barrel, a bottom feeding method is formed, which can not only reduce the air residue in the barrel, but also effectively prevent the slurry in the injection tube from entering the barrel after the feeding stops.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a metal die-casting injection structure, comprising a barrel, a feeding mechanism, and an injection tube, wherein one end of the injection tube is connected to the barrel from bottom to top and the other end is connected to the feeding mechanism, the feeding mechanism comprising a feeding zone, a melting zone, a feeding area, and a screw feeding mechanism, wherein the feeding zone is provided with a feeding port at the upper part, the feeding zone is located above the melting zone, and the screw feeding mechanism is fixedly connected to one end of the feeding zone;

[0005] The melting zone includes a melting tank, inside which a stirrer is installed. One end of the feeding zone is connected to the upper part of the melting tank, and one end of the supply zone is connected to the side of the melting tank and the other end is connected to the injection tube.

[0006] Furthermore, a partition is fixed to the top surface inside the molten material barrel, and the interface of the feeding area and the interface of the delivery area in the molten material barrel are separated by the partition.

[0007] Furthermore, an induction heating coil is fitted around the outside of the molten material barrel, and an induction heating coil is fitted around the outside of the injection tube.

[0008] Furthermore, the feeding area is an electromagnetic feeding area.

[0009] Furthermore, a liquid level sensor is fixed inside the melting tank. The liquid level sensor includes a high liquid level, a low liquid level, and an alarm liquid level. The lower end of the high liquid level is higher than the low liquid level, the lower end of the low liquid level is higher than the alarm liquid level, and the lower end of the alarm liquid level is higher than the interface of the feeding area in the melting tank.

[0010] Furthermore, the material cylinder has a material cavity inside, and the injection tube includes an injection channel. The material cavity is connected to the feeding mechanism through the injection channel.

[0011] Furthermore, the actuator is located at one end of the barrel, and the actuator includes a hammer head located inside the barrel.

[0012] Furthermore, the material cylinder is horizontal, the material cylinder is set horizontally, the injection tube is located below the material cylinder, the connection end of the injection tube and the material cylinder is located at the lower part of the material cylinder, and the injection channel is provided with an injection port at one end of the material cylinder, the injection port being perpendicular to the material cavity.

[0013] Furthermore, the material cylinder is vertical, the material cylinder is set vertically, the injection tube is located on the side of the material cylinder, the hammer is located near the bottom of the material cylinder, the injection tube is inclined upward and connected to the side of the material cylinder, and the injection channel is provided with an injection port at one end of the material cylinder, the injection port being perpendicular to the material cavity.

[0014] Furthermore, the diameter of the injection port is smaller than the diameter of the injection channel, and the injection port is located close to the hammer head.

[0015] In summary, this utility model has the following beneficial effects:

[0016] 1. Before die casting, the slurry enters the material cavity from the injection port. After entering the material cavity, the slurry impacts the top of the material cavity and then falls due to gravity. As the slurry continuously enters the material cavity, the subsequent slurry pushes the previous slurry towards the die casting mold. After the slurry reaches the top of the material cavity, it pushes the air in the material cavity, especially at the top, out of the material cavity and into the die casting mold in the direction of slurry movement. This helps to remove air from the material cavity and greatly reduces the probability of air residue in the material cavity, thereby reducing the defect rate of die castings.

[0017] 2. In this embodiment, since the slurry in the material cavity is fed from bottom to top against gravity, when the feeding mechanism stops feeding, the slurry in the injection port will no longer enter the material cavity, which can achieve the effect of timely material stopping. This enables precise control of the material and obtains high-quality casting products. The use of anti-gravity feeding can solve the problem of material contact with air, solve the problem of material filling, solve the problem of secondary gas entrapment and oxidation during the pushing process, improve the vacuum degree of the mold, greatly reduce the gas content in the product and material, reduce the internal resistance of the mold cavity, make molding smoother, and broaden the adaptability of the process to meet the production of more complex metal casting products. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of existing technology;

[0019] Figure 2 This is a schematic diagram of the structure of this embodiment;

[0020] Figure 3 This is a partial sectional view of this embodiment;

[0021] Figure 4 This is a schematic diagram of slurry feeding.

[0022] Reference numerals: 1. Barrel; 11. Material chamber; 2. Driver; 21. Hammer; 3. Feeding mechanism; 31. Feeding zone; 32. Inlet; 33. Screw feeding mechanism; 34. Agitator; 35. Melting zone; 36. Feeding zone; 37. Baffle; 38. Liquid level sensor; 381. High liquid level; 382. Low liquid level; 383. Alarm liquid level; 4. Injection tube; 41. First injection section; 42. Second injection section; 43. Injection channel; 44. Injection port. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] like Figures 1-4As shown, this embodiment discloses a metal die-casting injection structure, including a barrel 1, a driver 2, a feeding mechanism 3, and an injection tube 4. The barrel 1 is horizontal and horizontally arranged. The driver 2 is located at one end of the barrel 1, and the other end of the barrel 1 extends into the die-casting mold 6 and communicates with the forming cavity of the die-casting mold 6. The driver 2 includes a hammer 21, which is located inside the barrel 1. When the injection tube 4 injects slurry into the barrel 1, the driver 2 drives the hammer 21 to move rapidly toward the die-casting mold 6, thereby injecting the slurry in the barrel 1 into the mold cavity of the die-casting mold 6 to realize metal die-casting. The driver 2 in this embodiment has the same working principle as the second driver in the utility model patent with application number 202420633704 1.

[0026] The injection tube 4 is located below the material cylinder 1. The two ends of the injection tube 4 are connected to the material cylinder 1 and the feeding mechanism 3, respectively. The connection end of the injection tube 4 and the material cylinder 1 is located at the lower part of the material cylinder 1. The material cylinder 1 is provided with a material cavity 11. The injection tube 4 includes an injection channel 43. The material cavity 11 is connected to the feeding mechanism 3 through the injection channel 43. The feeding mechanism 3 is used to transport slurry so that the slurry is injected from the injection channel 43 in the injection tube 4 into the material cavity 11 of the material cylinder 1.

[0027] The injection channel 43 is located at one end of the barrel 1 and has an injection port 44. The injection port 44 is sealed to the barrel 1 and is perpendicular to the material cavity 11. The injection port 44 is located close to the hammer head 21 and its diameter is smaller than that of the injection channel 43. Before die casting, the slurry enters the material cavity 11 from the injection port 44. After entering the material cavity 11, the slurry impacts the top of the material cavity 11 and then falls due to gravity. As the slurry continuously enters the material cavity 11, the subsequent slurry pushes the preceding slurry towards the die casting mold 6. After the slurry reaches the top of the material cavity 11, it will fill the material cavity 11, especially the top. The air is pushed into the discharge cavity 11 and into the die-casting mold 6 in the direction of slurry movement, which helps to expel the air in the discharge cavity 11 and greatly reduces the probability of air residue in the discharge cavity 11, thereby reducing the defect rate of die-cast parts. After the air in the discharge cavity 11 is discharged into the die-casting mold 6, the air in the mold cavity is discharged through the air extraction channel and air extraction interface (not shown in the figure) set in the die-casting mold 6. The air extraction channel and air extraction interface are existing technologies. Their function and principle are that the air extraction channel and air extraction interface are set to evacuate the mold cavity through the vacuum source during the entire filling process, so as to maintain the negative pressure in the mold cavity, which is conducive to the slurry filling the mold cavity.

[0028] In this embodiment, since the slurry in the material cavity 11 is fed from bottom to top against gravity, when the feeding mechanism 3 stops feeding, the slurry in the injection port 44 will no longer enter the material cavity 11, which can achieve the effect of timely material stopping. This enables precise control of the material and obtains high-quality casting products. The use of anti-gravity feeding can solve the problem of material contact with air, solve the problem of material filling, solve the problem of secondary air entrapment and oxidation during the pushing process, improve the vacuum degree of the mold, greatly reduce the gas content in the product and material, reduce the internal resistance of the mold cavity, make molding smoother, and broaden the adaptability of the process to meet the production of more complex metal casting products.

[0029] The feeding mechanism 3 includes a feeding area 31, a melting area 35, a feeding zone 36, and a screw feeding mechanism 33. The feeding area 31 is a tubular structure with a feeding port 32 at its upper part. The feeding area 31 is located above the melting area 35. The screw feeding mechanism 33 is fixedly connected to one end of the feeding area 31. The screw feeding mechanism 33 is a prior art technology, and its screw part is located in the horizontally arranged feeding area 31.

[0030] The melting zone 35 includes a melting barrel, on the outside of which is an induction heating coil. The heating coil heats the melting barrel to melt the material inside. Induction heating is existing technology, and its specific structure will not be described in detail in this specification. A stirrer 34 is installed inside the melting barrel, and a drive motor (not shown in the figure) is connected to the upper end of the stirrer 34. The motor drives the stirrer 34 to rotate, which is used to stir the material inside the melting barrel. One end of the feeding zone 31 is connected to the upper part of the melting barrel. One end of the feeding zone 36 is connected to the side of the melting barrel and the other end is connected to the injection tube 4. An induction heating coil is fitted on the outside of the injection tube 4. The feeding zone 36 is electromagnetic feeding. The heating coil of the injection tube 4 and the feeding zone 36 are existing technologies, and their specific structures will not be described in detail in this specification.

[0031] The inner top surface of the molten material barrel is fixed with a partition 37. The interface of the feeding area 36 in the molten material barrel and the interface of the feeding area 31 in the molten material barrel are separated by the partition 37. The partition 37 is used to prevent magnesium powder in the feeding area 31 from directly entering the feeding area 36. A temperature sensor is also installed inside the molten material barrel to sense the temperature inside the molten material barrel.

[0032] A liquid level sensor 38 is fixed inside the melting tank. The liquid level sensor 38 includes a high liquid level 381, a low liquid level 382, ​​and an alarm liquid level 383. The lower end of the high liquid level 381 is higher than the low liquid level 382, ​​the lower end of the low liquid level 382 is higher than the alarm liquid level 383, and the lower end of the alarm liquid level 383 is higher than the interface of the feeding area 36 in the melting tank. By setting three liquid levels, both excessive material in the melting tank and material shortage can be avoided.

[0033] During operation, magnesium alloy particles enter the feeding zone 31 from the feed inlet 32. The particles are then conveyed to the melting zone 35 by the screw feeding mechanism 33. The magnesium alloy particles are heated and melted by induction heating. The molten magnesium alloy material enters the feeding zone 36 and is fed to the injection tube 4 by electromagnetic feeding. During die casting, the remaining material in the injection tube 4 falls to the bottom, achieving material return.

[0034] Example 2: The difference between this example and Example 1 is the position of the material cylinder 1 and the injection tube 4. In this example, the material cylinder 1 is vertical (not shown in the figure). The material cylinder 1 is set vertically, the injection tube 4 is located on the side of the material cylinder 1, the hammer head 21 is located near the bottom of the material cylinder 1, the injection tube 4 is inclined upward and connected to the side of the material cylinder 1, and the injection channel 43 is provided with an injection port 44 at one end of the material cylinder 1. The injection port 44 is perpendicular to the material cavity 11.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A metal die-casting injection structure, characterized in that, It includes a barrel (1), a feeding mechanism (3) and an injection tube (4). One end of the injection tube (4) is connected to the barrel (1) from bottom to top and the other end is connected to the feeding mechanism (3). The feeding mechanism (3) includes a feeding area (31), a melting area (35), a feeding area (36) and a screw feeding mechanism (33). The feeding area (31) is provided with a feed inlet (32) at the top. The feeding area (31) is located above the melting area (35). The screw feeding mechanism (33) is fixedly connected to one end of the feeding area (31). The melting zone (35) includes a melting tank, inside which a stirrer (34) is installed. One end of the feeding zone (31) is connected to the upper part of the melting tank, and one end of the supply zone (36) is connected to the side of the melting tank and the other end is connected to the injection tube (4).

2. The metal die-casting injection structure according to claim 1, characterized in that, A partition (37) is fixed on the top surface inside the molten material barrel. The feeding area (36) at the interface of the molten material barrel and the feeding area (31) at the interface of the molten material barrel are separated by the partition (37).

3. The metal die-casting injection structure according to claim 2, characterized in that, An induction heating coil is fitted around the outside of the molten material barrel, and an induction heating coil is fitted around the outside of the injection tube.

4. The metal die-casting injection structure according to claim 2, characterized in that, The feeding area (36) is electromagnetically fed.

5. A metal die-casting injection structure according to claim 2, characterized in that, A liquid level sensor (38) is fixed inside the melting tank. The liquid level sensor (38) includes a high liquid level (381), a low liquid level (382), and an alarm liquid level (383). The lower end of the high liquid level (381) is higher than the low liquid level (382). The lower end of the low liquid level (382) is higher than the alarm liquid level (383). The lower end of the alarm liquid level (383) is higher than the interface of the feeding area (36) at the melting tank.

6. The metal die-casting injection structure according to claim 1, characterized in that, The material cylinder (1) has a material cavity (11) inside, and the injection tube (4) includes an injection channel (43). The material cavity (11) is connected to the feeding mechanism (3) through the injection channel (43).

7. A metal die-casting injection structure according to claim 6, characterized in that, It also includes a driver (2) located at one end of the barrel (1), the driver (2) including a hammer (21) located inside the barrel (1).

8. The metal die-casting injection structure according to claim 7, characterized in that, The material cylinder (1) is horizontal and is set horizontally. The injection tube (4) is located below the material cylinder (1). The connection end of the injection tube (4) and the material cylinder (1) is located at the lower part of the material cylinder (1). The injection channel (43) is provided with an injection port (44) at one end of the material cylinder (1). The injection port (44) is perpendicular to the material cavity (11).

9. A metal die-casting injection structure according to claim 7, characterized in that, The material cylinder (1) is vertical and is set vertically. The injection tube (4) is located on the side of the material cylinder (1). The hammer (21) is located near the bottom of the material cylinder (1). The injection tube (4) is connected to the side of the material cylinder (1) at an angle upward. The injection channel (43) is provided with an injection port (44) at one end of the material cylinder (1). The injection port (44) is perpendicular to the material cavity (11).

10. A metal die-casting injection structure according to claim 8 or 9, characterized in that, The diameter of the injection port (44) is smaller than the diameter of the injection channel (43), and the injection port (44) is located close to the hammer head (21).

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