Die-casting machine material pipe provided with lining

Abstract

The die-casting machine material pipe comprises a material pipe body (1) and the cylindrical lining (2), the two ends of the material pipe body (1) are open, a channel (01) for a die-casting machine punch to pass through is formed in the material pipe body (1), a material pipe pouring opening (11) is formed in the side wall of the end communicated with a die-casting die, and the die-casting machine punch enters the channel (01) from the side, away from the die-casting die, of the material pipe body (1). Pushing the molten metal to the die-casting die; the side wall of the bushing (2) is provided with a bushing pouring port (21) corresponding to the material pipe pouring port (11); the lining (2) is fixedly installed in the annular notch (12) in the inner side of the material pipe body (1), the lining (2) and the material pipe body (1) jointly form a straight round pipe with the two ends open, and the inner surface of the lining (2) and the inner surface of the material pipe body (1) are continuous and jointly define a channel (01). Therefore, gravity impact and high-temperature erosion of molten metal can be resisted by utilizing the lining (2), and the material pipe body (1) is protected from being damaged.

Description

Technical Field

[0001] The utility model relates to a shot sleeve of a die-casting machine, in particular to a structure of a shot sleeve of a die-casting machine which is provided with a bushing and has a long service life. Background Art

[0002] Die-casting machines can be mainly divided into two different types: hot-chamber die-casting machines and cold-chamber die-casting machines. Cold-chamber die-casting machines can withstand a relatively large pressure range and can be used in die-casting processes of high-melting-point alloys such as aluminum, copper, magnesium, and zinc alloys with a relatively high aluminum content.

[0003] A cold-chamber die-casting machine is equipped with a shot sleeve. In the die-casting process, it is necessary to first melt the metal using an independent crucible, and then transfer a certain amount of molten metal into the shot sleeve using a ladle or a chute. Then, the mechanical pressure provided by a punch is used to inject the molten metal in the shot sleeve into the mold. After holding the pressure for a period of time, a die-cast product can be obtained. The size of the shot sleeve is obtained according to the size of the mold, the weight of the product, and the filling rate of the die-casting process. Taking a 3200T die-casting machine as an example, the size of the shot sleeve generally used is between 140 and 190 in diameter, which is relatively large. When installing, multiple workers need to work simultaneously, and the manufacturing cost is relatively high.

[0004] However, when the ladle or chute transfers the molten metal to the shot sleeve, the molten metal will impact the inner wall of the pouring port of the shot sleeve due to its own gravity. In addition, the temperature of the molten metal generally exceeds 650°C, which is extremely easy to erode the inner wall of the shot sleeve and cause damage to the shot sleeve.

[0005] Since the inner and outer diameters of the punch and the shot sleeve are designed to match each other, the damage to the inner wall of the shot sleeve will affect the injection speed of the punch, hinder the die-casting production process, affect the product quality, and even cause the punch to be stuck and unable to form an injection. In actual production, to ensure the product qualification rate, the shot sleeve is usually replaced after about 10,000 shots, which is much less than the rated life of 50,000 shots of a general shot sleeve, increasing the production cost. Moreover, the number of workers and working hours required to replace the shot sleeve are large, which will reduce the OEE (Overall Equipment Effectiveness) of production. Summary of the Utility Model

[0006] The purpose of the utility model is to extend the service life of the shot sleeve, reduce the frequency of replacing the shot sleeve, and reduce the production cost caused by replacing the shot sleeve, so as to ensure the qualification rate of die-cast products and improve the OEE (Overall Equipment Effectiveness) of production.

[0007] For the above purposes, the present utility model provides a die-casting machine material pipe installed with a bushing, which includes a material pipe body 1. Both ends of the material pipe body 1 are open, and a channel 01 for the die-casting machine punch to pass through is formed inside. One end is connected to the die-casting mold. There is a material pipe pouring port 11 on the side wall of the material pipe body 1 close to the die-casting mold for injecting molten metal. The die-casting machine punch enters the channel 01 from the side of the material pipe body 1 away from the die-casting mold and pushes the molten metal towards the die-casting mold.

[0008] The die-casting machine material pipe also has a cylindrical bushing 2. The side wall of the bushing 2 has a bushing pouring port 21 corresponding to the material pipe pouring port 11.

[0009] The inner side wall of the material pipe body 1 close to the die-casting mold has an annular notch 12. The bushing 2 is fixedly installed in the annular notch 12 by a first screw 22 and jointly forms a straight circular pipe with both ends open with the material pipe body 1.

[0010] The inner surface of the bushing 2 is continuous with the inner surface of the material pipe body 1 and jointly encloses the channel 01.

[0011] Therefore, during the die-casting production process, by using the bushing 2 to resist the gravity impact and high-temperature erosion of the molten metal, the material pipe body 1 can be protected from damage. After production for a period of time, only the cheap bushing 2 needs to be replaced by stopping the machine, and there is no need to take the die-casting mold off the machine or replace the material pipe body 1.

[0012] The present utility model can effectively balance product quality and production cost, not only improving the stability of the die-casting system and the product qualification rate, prolonging the overall service life of the material pipe and reducing the production cost, but also indirectly improving the OEE (Overall Equipment Effectiveness) of production.

[0013] Preferably, the outer side of the bushing 2 has an inwardly concave first thread groove 201, and the side wall of the material pipe body 1 has a first screw hole 101 corresponding to the first thread groove 201.

[0014] The center lines of the first thread groove 201 and the first screw hole 101 coincide and are perpendicular to the center line of the material pipe body 1. The first screw 22 is threadedly connected to the first screw hole 101 and the first thread groove 201 to fix the bushing 2 to the material pipe body 1.

[0015] Since the first screw 22 used to fix the bushing 2 is in a perpendicular state to the center line L1 of the material pipe body 1, that is, perpendicular to the direction of the force generated on the bushing 2 during the reciprocating movement of the punch in the channel 01, it can prevent the bushing 2 from loosening or displacing due to the influence of the punch movement.

[0016] Preferably, it further includes a cubic anti-rotation block 4. One end of the material pipe body 1 close to the die-casting mold has a concave first installation groove 41, and one end of the bushing 2 close to the die-casting mold has a concave second installation groove 42. The first installation groove 41 and the second installation groove 42 are combined to have a shape matching the anti-rotation block 4. The anti-rotation block 4 is fixedly installed in the first installation groove 41 and the second installation groove 42 through a second screw 43.

[0017] During the production process, the anti-rotation block 4 can help the first screw 22 share part of the force, make the installation of the bushing 2 more firm, and especially prevent it from rotating due to the force.

[0018] Preferably, one ends of the material pipe body 1 and the bushing 2 close to the die-casting mold are fixedly installed with an annular sealing plate 5 through a plurality of third screws 51. The outer diameter of the sealing plate 5 is equal to the outer diameter of the material pipe body 1, and the inner diameter of the sealing plate 5 is equal to the inner diameter of the bushing 2.

[0019] The sealing plate 5 can limit the bushing 2 inside the material pipe body 1 and prevent the punch from taking out the bushing 2 during movement.

[0020] Preferably, the anti-rotation block 4 and the first screw 22 are respectively located on opposite side walls of the bushing 2.

[0021] In actual situations, limited by the manufacturing precision of the equipment, and in order to facilitate the installation of the bushing 2 inside the material pipe body 1, the outer diameter of the bushing 2 is slightly smaller than the inner diameter of the material pipe body 1, that is to say, there will inevitably be a gap between the bushing 2 and the material pipe body 1.

[0022] By using the cooperation of the anti-rotation block 4 and the first screw 22 located at relative positions, the bushing 2 can be expanded, preventing the generation of uneven steps in the channel 01 and affecting the injection speed of the punch.

[0023] Moreover, by using the cooperation of the structures of the anti-rotation block 4, the first installation groove 41, and the second installation groove 42, the first thread groove 201 and the first screw hole 101, the material pipe pouring port 11 and the bushing pouring port 21 can be quickly aligned when installing the bushing 2.

[0024] Preferably, on one side of the first screw hole 101 away from the center line of the material pipe body 1, there is a flat table 31 facilitating the installation of the first screw 22, which is more conducive to locking the first screw 22.

[0025] Preferably, the first screw hole 101 on the material pipe body 1 is close to the material pipe pouring port 11. That is, when the die-casting machine material pipe is installed in the die-casting machine, the first screw hole 101 is located on the upper side, which is more convenient for the staff to disassemble, install, and replace the bushing 2. Description of the Drawings

[0026] Figure 1It is a structural diagram of the injection tube of a die-casting machine equipped with a bushing;

[0027] Figure 2 It is an exploded diagram of the injection tube of a die-casting machine equipped with a bushing;

[0028] Figure 3 It is a sectional view of the injection tube body and the bushing cut along the center line L1 of the injection tube body. Specific embodiments

[0029] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings. The following description is a specific implementation of the claims of the present invention. For ease of description, the injection tube of the die-casting machine equipped with a bushing will be simply referred to as the "injection tube of the die-casting machine" hereinafter.

[0030] Figure 1 The overall structure of the injection tube of the die-casting machine is shown, Figure 2 The structure of each component of the injection tube of the die-casting machine and the connection relationship between them are shown in the form of an exploded view, Figure 3 It is a sectional view of the injection tube body and the bushing cut along the center line L1 of the injection tube body.

[0031] Combined with Figures 1 - 3 Looking at it, the injection tube of the die-casting machine includes: an injection tube body 1, a bushing 2, an anti-rotation block 4, and a sealing plate 5.

[0032] The injection tube body 1 is made of H13 steel, with both ends open. One end is connected to the die-casting mold, and there is an injection port 11 on the side wall of the injection tube body 1 close to the die-casting mold (i.e., the front side in Figures 1 - 3 ) for injecting molten metal. The other end of the injection tube body 1 faces the punch of the die-casting machine, and the punch enters the injection tube body 1 from the side away from the die-casting mold (i.e., the rear side in Figures 1 - 3 ) to push the molten metal towards the die-casting mold. The application method of the injection tube is prior art and will not be elaborated here.

[0033] The bushing 2 is a cylindrical shape made of H13 steel, with both ends open, and is installed inside the injection tube body 1 close to the die-casting mold.

[0034] As Figure 3 shown, the inner side wall of the injection tube body 1 close to the die-casting mold has an annular notch 12, and the bushing 2 is fixedly installed in the annular notch 12, jointly forming a straight circular tube shape with both ends open with the injection tube body 1. And there is a bushing injection port 21 corresponding to the injection port 11 on the upper side wall of the bushing 2. The inner surface of the bushing 2 is continuous with the inner surface of the injection tube body 1, enclosing a passage 01 for the punch to pass through, so that the molten metal can enter the passage 01 through the injection port 11 of the injection tube and the injection port 21 of the bushing, and then be pushed towards the die-casting mold by the punch.

[0035] The bushing 2 is a detachable and replaceable component that can separate the molten metal from the barrel body 1. The damage caused by the gravitational impact and high-temperature erosion of the molten metal will only occur on the inner surface of the bushing 2. Therefore, during the production process, only the bushing 2 needs to be replaced regularly, without removing the die-casting mold from the machine or replacing the barrel body 1.

[0036] See Figure 3 , the outer side of the bushing 2 has a concave first thread groove 201, and the side wall of the barrel body 1 has a first screw hole 101 corresponding to the first thread groove 201. The center lines L101 and L201 of the first thread groove 201 and the first screw hole 101 coincide and are perpendicular to the center line L1 of the barrel body 1. Combining Figure 2 , the first screw 22 (tension countersunk screw) is threadedly connected to the first screw hole 101 and the first thread groove 201 to fix the bushing 2 to the barrel body 1.

[0037] Since the first screw 22 used to fix the bushing 2 is perpendicular to the center line L1 of the barrel body 1, that is, perpendicular to the direction of the force generated on the bushing 2 during the reciprocating movement of the punch in the channel 01, it can prevent the bushing 2 from loosening or displacing due to the influence of the punch movement.

[0038] On one side of the first screw hole 101 away from the center line of the barrel body 1, there is a flat platform 31 that facilitates the installation of the first screw 22, which is more conducive to tightening the first screw 22. The first screw hole 101 on the barrel body 1 is close to the barrel pouring port 11, that is, when the die-casting machine barrel is installed in the die-casting machine, the first screw hole 101 is located on the upper side, which is more convenient for the staff to disassemble, install, and replace the bushing 2.

[0039] As Figure 2 , 3 shown, the anti-rotation block 4 is cubic. As Figure 2 shown, one end of the barrel body 1 close to the die-casting mold has a concave first installation groove 41, and one end of the bushing 2 close to the die-casting mold has a concave second installation groove 42. The first installation groove 41 and the second installation groove 42 are combined to form a cubic groove that matches the anti-rotation block 4. The anti-rotation block 4 is fixed and installed in the first installation groove 41 and the second installation groove 42 by a second screw 43 (hexagonal countersunk screw).

[0040] That is, as Figure 3 shown, the first installation groove 41 and the anti-rotation block 4 respectively have second thread grooves 411 and second thread holes 421 with corresponding positions. The second screw 43 is threadedly connected to the second thread groove 411 and the second thread hole 421 to fix the anti-rotation block 4.

[0041] During the production process, the rotation stop block 4 can help the first screw 22 share part of the force, making the installation of the bushing 2 more firm, especially preventing it from rotating due to the force.

[0042] In addition, as Figure 3 shown, the rotation stop block 4 and the first screw 22 are respectively located on the opposite side walls of the bushing 2. In actual situations, due to limitations in equipment manufacturing precision and for the convenience of installing the bushing 2 in the material pipe body 1, the outer diameter of the bushing 2 is slightly smaller than the inner diameter of the material pipe body 1, that is to say, there will inevitably be a gap between the bushing 2 and the material pipe body 1.

[0043] By using the cooperation of the rotation stop block 4 and the first screw 22 located at relative positions, the bushing 2 can be expanded, preventing the generation of uneven steps in the channel 01 and affecting the injection speed of the punch. Moreover, by using the cooperation of the rotation stop block 4, the first installation groove 41, and the second installation groove 42, the first thread groove 201 and the first screw hole 101, and the material pipe pouring port 11 and the bushing pouring port 21 can be quickly aligned when installing the bushing 2.

[0044] As Figure 1 、 2 shown, the sealing plate 5 is an annular steel plate made of H13 steel, and is fixedly installed at the front ends of the material pipe body 1 and the bushing 2 through a plurality of third screws 51. Its outer diameter is equal to the outer diameter of the material pipe body 1, and its inner diameter is equal to the inner diameter of the bushing 2. The sealing plate 5 can limit the bushing 2 inside the material pipe body 1, preventing the punch from taking out the bushing 2 during movement.

[0045] As Figure 2 、 3 shown, one end of the material pipe body 1 close to the die-casting mold has a plurality of third thread grooves 13, and the sealing plate 5 has a plurality of third screw holes 53 corresponding to the third thread grooves 13. The sealing plate 5 and the material pipe body 1 are fixed by a plurality of third screws 51 respectively threadedly connecting with the third screw holes 53 and the third thread grooves 13.

[0046] The die-casting machine material pipe assembly provided by the present utility model has simple steps. It only needs to place the bushing 2 into the material pipe body 1, put the rotation stop block 4 into the first installation groove 41 and the second installation groove 42 and fix it with the second screw 43, then screw the first screw 22 into the first screw hole 101 and the first thread groove 201 to fix the bushing 2 and the material pipe body 1, and then use the third screw 51 to install the sealing plate 5 at the ends of the material pipe body 1 and the bushing 2.

[0047] Therefore, during the die-casting production process, by using the bushing 2 to resist the gravity impact and high-temperature erosion of the molten metal, the body 1 of the injection barrel can be protected from damage. After a period of production, it is only necessary to stop the machine to replace the inexpensive bushing 2, without removing the die-casting mold from the machine or replacing the body 1 of the injection barrel. The utility model can effectively balance product quality and production cost, not only improving the stability of the die-casting system and the qualified rate of products, but also extending the overall service life of the injection barrel, reducing production cost, and indirectly improving the OEE (Overall Equipment Effectiveness) of production.

Claims

1. A die-casting machine material pipe equipped with a bushing, comprising a material pipe body (1), the two ends of the material pipe body (1) being open, a channel (01) being formed inside for a die-casting machine punch to pass through, one end being connected to a die-casting mold, a material pipe pouring port (11) being provided on a side wall of the material pipe body (1) close to the die-casting mold for injecting molten metal, the die-casting machine punch entering the channel (01) from the side of the material pipe body (1) away from the die-casting mold to push the molten metal toward the die-casting mold, It is characterized in that It also comprises a cylindrical bushing (2), wherein the side wall of the bushing (2) comprises a bushing pouring port (21) corresponding to the material pipe pouring port (11). The inner side wall of the material pipe body (1) close to the die-casting mold has an annular notch (12), and the bushing (2) is fixedly installed in the annular notch (12) by a first screw (22), and together with the material pipe body (1) forms a straight round tube with open ends. The inner surface of the bushing (2) is continuous with the inner surface of the material pipe body (1), and together they form a channel (01).

2. The die casting machine material tube equipped with a bushing according to claim 1, characterized in that: The outer side of the bushing (2) has an inwardly concave first thread groove (201), and the side wall of the material pipe body (1) has a first screw hole (101) corresponding to the first thread groove (201). The center lines of the first thread groove (201) and the first screw hole (101) coincide with each other and are perpendicular to the center line of the material tube body (1). The first screw (22) is threadedly connected to the first screw hole (101) and the first thread groove (201) to fix the bushing (2) to the material pipe body (1).

3. The die casting machine material tube equipped with a bushing according to claim 2, characterized in that: It also includes a cubic anti-rotation block (4), The end of the material pipe body (1) close to the die-casting mold has a concave first mounting groove (41), and the end of the bushing (2) close to the die-casting mold has a concave second mounting groove (42). The first mounting groove (41) and the second mounting groove (42) are combined to have a shape matching the anti-rotation block (4), and the anti-rotation block (4) is fixedly installed in the first mounting groove (41) and the second mounting groove (42) by a second screw (43).

4. The die casting machine material tube equipped with a bushing according to claim 1, characterized in that: An annular sealing plate (5) is fixedly mounted on one end of the material pipe body (1) and the bushing (2) close to the die-casting mold by a plurality of third screws (51); the outer diameter of the sealing plate (5) is equal to the outer diameter of the material pipe body (1), and the inner diameter of the sealing plate (5) is equal to the inner diameter of the bushing (2).

5. The die casting machine material tube equipped with a bushing according to claim 3, characterized in that: The anti-rotation block (4) and the first screw (22) are respectively located on two opposite side walls of the bushing (2).

6. The die casting machine material tube equipped with a bushing according to any one of claims 2, 3 and 5, characterized in that: A flat platform (31) for facilitating installation of a first screw (22) is provided on a side of the first screw hole (101) away from the center line of the material tube body (1).

7. The die casting machine material tube equipped with a bushing according to any one of claims 2, 3 and 5, characterized in that: The first screw hole (101) on the material pipe body (1) is close to the material pipe pouring port (11).

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