Barrel and die casting machine

Abstract

This utility model relates to a material cylinder and a die-casting machine. The material cylinder includes a cylinder body and a cooling pipe. The cylinder body has a first port and a second port along its axial direction. A material discharge port is provided on the outer wall of the cylinder body, located near the first port. A first cooling channel is provided between the inner wall surface and the outer wall surface of the cylinder body. The cooling pipe is mounted on the cylinder body, located near the second port, and has a second cooling channel within it. The material cylinder of this utility model has a better cooling effect, which can reduce the probability of material bursting during mold opening and improve production stability.

Description

Technical Field

[0001] This utility model relates to the field of die casting technology, specifically to a material cylinder and a die casting machine. Background Technology

[0002] Die casting is a casting process in which molten metal is poured into the barrel of a die casting machine. Under pressure, the molten metal fills the cavity of the die casting mold at a high speed, and then cools and solidifies under high pressure to form a die casting. During injection die casting, the barrel needs to be cooled to ensure the quality of the die casting and the stability of the die casting machine. In some related technologies, the cooling structure of the barrel is poorly designed, resulting in inadequate cooling near the die plate area. This can easily lead to die plate bursting during mold opening, affecting production stability. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a material cylinder with better cooling effect, which can reduce the probability of material cake bursting during mold opening and improve production stability.

[0005] An embodiment of this utility model also proposes a die-casting machine.

[0006] The material cylinder of this utility model includes: a cylinder body having a first port and a second port along its axial direction, a material discharge port on the outer wall of the cylinder body arranged near the first port, and a first cooling channel between the inner wall surface and the outer wall surface of the cylinder body; and a cooling pipe installed on the cylinder body, arranged near the second port, and having a second cooling channel inside the cooling pipe.

[0007] According to the embodiment of this utility model, when the die-casting machine is working, molten metal enters the cylinder through the discharge port and flows out through the second port under the punching action of the punch. Since a first cooling channel is provided between the inner and outer walls of the cylinder, the entire cylinder can be cooled through this channel. Because the cooling pipe is installed in the cylinder and arranged near the second port, the cylinder can selectively cool the end near the die blank through the cooling pipe, thereby reducing the probability of the die blank bursting during mold opening. Therefore, the cylinder of this utility model, through the coordinated cooling of the first cooling channel within the cylinder and the second cooling channel within the cooling pipe, can improve the cooling effect of the cylinder, reduce the probability of the die blank bursting during mold opening, and improve production stability.

[0008] In some embodiments, the cooling pipe surrounds the outer wall of the cylinder circumferentially.

[0009] In some embodiments, the cooling pipe comprises at least two turns, which are arranged axially along the cylinder.

[0010] In some embodiments, the cooling pipe is a metal pipe.

[0011] In some embodiments, the outer wall surface of the cylinder is provided with a groove, the groove is arranged circumferentially around the cylinder, and the cooling pipe is disposed in the groove.

[0012] In some embodiments, the shortest distance between the groove and the first port along the axial direction of the cylinder is L, where 10mm≤L≤20mm.

[0013] In some embodiments, the cooling pipe is detachably connected to the cylinder.

[0014] In some embodiments, the barrel further includes a fixing block, which is detachably mounted in the groove and abuts against the cooling pipe.

[0015] In some embodiments, thermal grease is provided at the junction of the cooling pipe and the cylinder.

[0016] In some embodiments, the first cooling channel includes a plurality of annular channels and a plurality of longitudinal channels. The annular channels are arranged circumferentially around the cylinder, the plurality of annular channels are spaced apart along the axial direction of the cylinder, the longitudinal channels extend along the axial direction of the cylinder, and the plurality of longitudinal channels are connected to the plurality of annular channels in a one-to-one correspondence.

[0017] Another embodiment of the die-casting machine of the present invention includes the barrel described in any one of the embodiments of the present invention.

[0018] According to an embodiment of the present invention, when the die-casting machine is working, molten metal enters the cylinder through the discharge port and flows out through the second port under the pressing action of the punch. Since a first cooling channel is provided between the inner and outer walls of the cylinder, the entire cylinder can be cooled through this channel. Because the cooling pipe is installed in the cylinder and arranged near the second port, the cylinder can selectively cool the end near the die piece, thereby reducing the probability of die piece bursting during mold opening. Therefore, the cylinder of this embodiment, through the coordinated cooling of the first cooling channel within the cylinder and the second cooling channel within the cooling pipe, improves the cooling effect of the cylinder, reduces the probability of die piece bursting during mold opening, and contributes to improved production stability.

[0019] In some embodiments, the die-casting machine further includes a cooling system, which contains a first cooling medium and a second cooling medium. The first cooling medium is introduced into the first cooling channel, and the second cooling medium is introduced into the second cooling channel. The specific heat capacity of the second cooling medium is greater than that of the first cooling medium. Attached Figure Description

[0020] Figure 1 This is a perspective view of the material cylinder according to an embodiment of the present utility model.

[0021] Figure 2 This is a cross-sectional view of the material cylinder according to an embodiment of the present invention.

[0022] Figure 3 yes Figure 2 A magnified view of A in the middle.

[0023] Figure 4 This is an exploded view of the material cylinder according to an embodiment of the present invention.

[0024] Figure 5 This is a partial cross-sectional view of the material cylinder according to an embodiment of the present invention.

[0025] Figure 6 yes Figure 2 Cross-sectional view of BB.

[0026] Figure label:

[0027] 1. Cylinder body; 11. First port; 12. Second port; 13. Material discharge port; 14. First cooling channel; 141. Annular channel; 1411. Branch channel; 142. Longitudinal channel; 15. Groove;

[0028] 2. Cooling pipe; 21. Second cooling channel; 211. Liquid inlet; 212. Liquid outlet;

[0029] 3. Fixing block; 31. Contouring groove. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is a reference appendix. Figures 1 to 6 This invention describes a material cylinder and a die-casting machine according to embodiments of the present invention.

[0032] like Figures 1 to 3As shown, the material cylinder of this embodiment includes a cylinder body 1 and a cooling pipe 2. The cylinder body 1 has a first port 11 and a second port 12 along its axial direction. The outer wall of the cylinder body 1 is provided with a discharge port 13, which is arranged near the first port 11. A first cooling channel 14 is provided between the inner wall surface and the outer wall surface of the cylinder body 1. The cooling pipe 2 is installed on the cylinder body 1 and is arranged near the second port 12. A second cooling channel 21 is provided inside the cooling pipe 2. Cooling medium can flow in both the first cooling channel 14 and the second cooling channel 21.

[0033] According to the embodiment of the present invention, when the die casting machine is working, the molten metal enters the cylinder 1 through the discharge port 13 and flows out through the second port 12 under the punching action of the punch. Since a first cooling channel 14 is provided between the inner wall surface and the outer wall surface of the cylinder 1, the entire cylinder can be cooled through the first cooling channel 14. Since the cooling pipe 2 is installed in the cylinder 1 and arranged close to the second port 12, the cylinder can be cooled in a targeted manner at the end of the cylinder 1 close to the die, thereby reducing the probability of the die exploding when the mold is opened during production.

[0034] Therefore, in the embodiment of this utility model, the material cylinder is cooled by the first cooling channel 14 in the cylinder body 1 and the second cooling channel 21 in the cooling pipe 2, which can improve the cooling effect of the material cylinder, reduce the probability of the material cake bursting when the mold is opened during production, and help improve the stability of production.

[0035] It is understandable that the cooling pipe 2 and the cylinder 1 are separate structures. In other words, the second cooling channel 21 is not formed inside the cylinder 1, but inside the cooling pipe 2, and the cooling medium in the second cooling channel 21 flows in the cooling pipe 2. Therefore, even if the cylinder 1 itself ruptures, the cooling medium in the second cooling channel 21 will not leak, thereby reducing the risk of explosion caused by the cooling medium coming into contact with the molten metal inside the cylinder 1.

[0036] On the other hand, the material barrel of the present invention, by setting a cooling pipe 2 in the region of the barrel 1 near the second port 12, can improve the structural strength of the region of the barrel 1 near the second port 12, reduce the risk of the barrel 1 breaking, and help extend the service life of the material barrel, compared with the solution of "building a cooling channel in the region of the barrel 1 near the second port 12".

[0037] For example, the coolant in the first cooling channel 14 is oil. Compared to the solution where the coolant in the first cooling channel 14 is water, when the coolant in the first cooling channel 14 leaks and comes into contact with the molten metal, the probability of the oil reacting with the molten metal and exploding is lower, thereby reducing the risk of explosion caused by the coolant coming into contact with the molten metal in the cylinder 1.

[0038] For example, the cooling medium in the second cooling channel 21 is water. Since water has a higher specific heat capacity than oil, its heat transfer efficiency is higher, resulting in better cooling. Because the cooling medium in the second cooling channel 21 is isolated by the cooling pipe 2, even if the cylinder 1 ruptures, the water in the second cooling channel 21 will not come into contact with the molten metal, thereby reducing the risk of explosion caused by contact between the cooling medium and the molten metal in the cylinder 1.

[0039] Optionally, such as Figure 1 and Figure 2 As shown, the cooling pipe 2 surrounds the outer wall of the cylinder 1 along its circumference. This facilitates the assembly of the cooling pipe 2 onto the cylinder 1, improving the ease of assembly. Compared to the design where the cooling pipe 2 is located on the inner wall of the cylinder 1, this avoids direct contact between the cooling pipe 2 and the molten metal inside the cylinder 1, thus improving the safety of the cylinder during operation and reducing the risk of explosion due to contact between the cooling medium in the cooling pipe 2 and the molten metal inside the cylinder 1.

[0040] For example, such as Figure 2 and Figure 3 As shown, the cooling pipe 2 comprises at least two turns, arranged axially along the cylinder 1. It is understood that each turn of the cooling pipe 2 can be a closed annulus or a spiral. Since the cooling pipe 2 comprises at least two turns arranged axially along the cylinder 1, the cooling effect in the area of ​​the second port 12 of the cylinder 1 (i.e., the end of the cylinder 1 closest to the material cake) can be further improved, reducing the risk of the material cake bursting during mold opening.

[0041] For example, the number of turns of the cooling pipe 2 can be two, three, or more; this utility model does not limit this.

[0042] For example, the cooling pipe 2 is a metal pipe. Since the metal pipe has a high heat transfer efficiency, the cooling medium inside the metal pipe can transfer the cold energy to the cylinder 1 more quickly, so as to improve the cooling efficiency of the area of ​​the second port 12 of the cylinder 1.

[0043] For example, cooling pipe 2 is a copper pipe or a steel pipe. In this example of the present invention, cooling pipe 2 is a copper pipe.

[0044] Optionally, such as Figure 2 and Figure 3As shown, the outer wall of the cylinder 1 is provided with a groove 15, which is arranged circumferentially around the cylinder 1, and the cooling pipe 2 is disposed within the groove 15. Because the outer wall of the cylinder 1 is provided with the groove 15, on the one hand, the distance between the cooling pipe 2 and the inner wall of the cylinder 1 can be shortened, allowing the cooling energy in the cooling pipe 2 to be transferred to the inner wall of the cylinder 1 more quickly. On the other hand, by accommodating the cooling pipe 2 through the groove 15, the cooling pipe 2 can be structurally avoided, resulting in a regular shape of the cylinder and facilitating the connection between the cylinder and the workpiece.

[0045] Optionally, such as Figure 3 As shown, the shortest distance between the groove 15 and the first port 11 along the axial direction of the cylinder 1 is L, where 10mm≤L≤20mm. For example, L can be 10mm, 12mm, 14mm, 15mm, 16mm, 18mm, or 20mm.

[0046] When L is less than 10mm, the groove 15 is too close to the first port 11, resulting in weak structural strength at the outer edge of the first port 11 of the cylinder 1, making it prone to cracking. When L is greater than 20mm, the groove 15 is too far from the first port 11, resulting in poor cooling effect on the area of ​​the first port 11 of the cylinder 1.

[0047] Therefore, by designing the groove 15 to the above-mentioned dimensions, the material cylinder of this utility model can both ensure the structural strength of the first port 11 of the cylinder body 1 and improve the cooling effect of the area of ​​the first port 11 of the cylinder body 1.

[0048] Optionally, the cooling pipe 2 is detachably connected to the cylinder 1. When the cooling pipe 2 is damaged or the internal flow channel is blocked, the cooling pipe 2 can be removed from the cylinder 1 separately, so that the operator can repair and replace the cooling pipe 2, reducing the maintenance cost of the cylinder in the later stage.

[0049] For example, such as Figure 4 and Figure 5 As shown, the barrel also includes a fixing block 3, which is detachably installed in the groove 15 and abuts against the cooling pipe 2. It can be understood that the fixing block 3 can press the cooling pipe 2 into the groove 15, preventing the cooling pipe 2 from wobbling relative to the groove 15. Furthermore, under the pressure of the fixing block 3, the contact between the cooling pipe 2 and the wall of the groove 15 is more secure, reducing or eliminating the installation gap between the cooling pipe 2 and the groove 15, thereby improving the heat exchange effect between the cooling pipe 2 and the barrel 1.

[0050] like Figure 4 and Figure 5 As shown, the fixing block 3 can be installed in the groove 15 by snap-fit ​​or interference fit. For example, the fixing block 3 is a wedge-shaped block, which snaps into the groove 15.

[0051] The number of fixing blocks 3 can be one, two, or more. In this embodiment of the invention, there are two fixing blocks 3, both of which are semi-annular structures. That is, the two fixing blocks 3 can be roughly spliced ​​together to form a complete ring. This increases the contact area between the fixing blocks 3 and the cooling pipe 2, and improves the pressing effect of the fixing blocks 3.

[0052] For example, such as Figure 4 As shown, the fixing block 3 has a contour groove 31 on the side near the cooling pipe 2. The shape of the contour groove 31 is the same as the shape of the cooling pipe 2. When the fixing block 3 is pressed against the cooling pipe 2, the contour groove 31 can contact the outer wall surface of the cooling pipe 2, thereby increasing the contact area between the fixing block 3 and the cooling pipe 2 and improving the pressing effect of the fixing block 3.

[0053] Optionally, thermal grease (not shown) is provided at the junction of the cooling pipe 2 and the cylinder 1. For example, the thermal grease can be ceramic filler thermal grease, metal filler thermal grease, or carbon material thermal grease. Because thermal grease is provided at the junction of the cooling pipe 2 and the cylinder 1, the heat exchange effect between the cooling pipe 2 and the cylinder 1 can be improved, resulting in better cooling effect in the area of ​​the cylinder 1 near the second port 12.

[0054] For example, such as Figure 4 As shown, the cooling pipe 2 is provided with an inlet 211 and an outlet 212. There is a clearance space between the two fixed blocks 3 arranged around the cylinder 1. The inlet 211 and the outlet 212 correspond to the clearance space so that the inlet 211 and the outlet 212 can be connected to the heat exchange pipeline of the outside.

[0055] Optionally, such as Figure 6 As shown, the first cooling channel 14 includes multiple annular channels 141 and multiple longitudinal channels 142. The annular channels 141 are arranged circumferentially around the cylinder 1, and the multiple annular channels 141 are spaced apart along the axial direction of the cylinder 1. The longitudinal channels 142 extend along the axial direction of the cylinder 1, and the multiple longitudinal channels 142 are connected to the multiple annular channels 141 in a one-to-one correspondence. Since the multiple longitudinal channels 142 are connected to the multiple annular channels 141 in a one-to-one correspondence, the multiple longitudinal channels 142 can introduce cooling medium into the multiple annular channels 141 in a one-to-one correspondence, so that the cooling medium in the multiple annular channels 141 is arranged in parallel to improve the cooling effect of the cylinder 1.

[0056] For example, such as Figure 6As shown, the annular flow channel 141 includes multiple branches 1411, which are arranged sequentially along the circumference of the cylinder 1, and adjacent branches 1411 are interconnected. The extension path of each branch 1411 is a straight line, one end of the branch 1411 extends to the outer wall surface of the cylinder 1, and one end of the branch 1411 is sealed by a sealing member (not shown), which facilitates the processing and manufacturing of the annular flow channel 141.

[0057] Another embodiment of the die-casting machine of the present invention includes the material cylinder of the present invention.

[0058] According to an embodiment of the present invention, when the die-casting machine is working, molten metal enters the cylinder 1 through the discharge port 13 and flows out through the second port 12 under the pressing action of the punch. Since a first cooling channel 14 is provided between the inner and outer walls of the cylinder 1, the entire cylinder can be cooled through the first cooling channel 14. Because the cooling pipe 2 is installed in the cylinder 1 and arranged near the second port 12, the cylinder can be specifically cooled at the end of the cylinder 1 closest to the die, thereby reducing the probability of the die bursting during mold opening. Therefore, in this embodiment of the present invention, the cylinder is cooled by the combined cooling of the first cooling channel 14 in the cylinder 1 and the second cooling channel 21 in the cooling pipe 2, which improves the cooling effect of the cylinder, reduces the probability of the die bursting during mold opening, and helps improve production stability.

[0059] Optionally, the die-casting machine also includes a cooling system, which contains a first cooling medium and a second cooling medium. The first cooling medium is introduced into the first cooling channel 14, and the second cooling medium is introduced into the second cooling channel 21. The specific heat capacity of the second cooling medium is greater than that of the first cooling medium.

[0060] Because the specific heat capacity of the second cooling medium is larger than that of the first cooling medium, its heat transfer efficiency is higher, resulting in better cooling. Furthermore, the second cooling medium is isolated by the cooling pipe 2, ensuring that even if the cylinder 1 ruptures, it will not come into contact with the molten metal, thus reducing the risk of an explosion caused by contact between the second cooling medium and the molten metal inside the cylinder 1.

[0061] For example, the second cooling medium is water, and the first cooling medium is oil. Since water has a larger specific heat capacity than oil, water has a higher heat transfer efficiency and a better cooling effect.

[0062] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A material barrel, characterized in that, include: A cylindrical body (1) has a first port (11) and a second port (12) along its axial direction. The outer wall of the cylindrical body (1) is provided with a discharge port (13), which is arranged close to the first port (11). A first cooling channel (14) is provided between the inner wall surface of the cylindrical body (1) and the outer wall surface of the cylindrical body (1). Cooling pipe (2) is installed on the cylinder (1) and is arranged near the second port (12). A second cooling channel (21) is provided inside the cooling pipe (2).

2. The feed cylinder according to claim 1, characterized in that, The cooling pipe (2) surrounds the outer wall of the cylinder (1) along the circumference of the cylinder (1).

3. The feed cylinder according to claim 2, characterized in that, The cooling pipe (2) comprises at least two turns, which are arranged along the axial direction of the cylinder (1).

4. The feed cylinder according to claim 1, characterized in that, The cooling pipe (2) is a metal pipe.

5. The feed cylinder according to claim 1, characterized in that, The outer wall surface of the cylinder (1) is provided with a groove (15), the groove (15) is arranged around the circumference of the cylinder (1), and the cooling pipe (2) is located in the groove (15).

6. The feed cylinder according to claim 5, characterized in that, The shortest distance between the groove (15) and the first port (11) along the axial direction of the cylinder (1) is L, where 10mm≤L≤20mm.

7. The feed cylinder according to claim 5, characterized in that, The cooling pipe (2) is detachably connected to the cylinder (1).

8. The feed cylinder according to claim 7, characterized in that, The feed cylinder also includes a fixing block (3), which is detachably installed in the groove (15) and abuts against the cooling pipe (2).

9. The feed cylinder according to any one of claims 1-8, characterized in that, Thermal paste is provided at the junction of the cooling pipe (2) and the cylinder (1).

10. The feed cylinder according to any one of claims 1-8, characterized in that, The first cooling channel (14) includes a plurality of annular channels (141) and a plurality of longitudinal channels (142). The annular channels (141) are arranged around the circumference of the cylinder (1), and the plurality of annular channels (141) are arranged at intervals along the axial direction of the cylinder (1). The longitudinal channels (142) extend along the axial direction of the cylinder (1), and the plurality of longitudinal channels (142) are connected to the plurality of annular channels (141) in a one-to-one correspondence.

11. A die-casting machine, characterized in that, The barrel includes any one of claims 1-10.

12. The die-casting machine according to claim 11, characterized in that, The die-casting machine also includes a cooling system, which contains a first cooling medium and a second cooling medium. The first cooling medium is introduced into the first cooling channel (14), and the second cooling medium is introduced into the second cooling channel (21). The specific heat capacity of the second cooling medium is greater than that of the first cooling medium.

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