A cylinder injection mechanism for a casting machine

Abstract

The utility model relates to a pressure injection mechanism technical field, especially a casting machine oil cylinder pressure injection mechanism, including the casting machine body, the one side fixedly connected with support plate of casting machine body, the one side fixedly connected with feed pipe of casting machine body near support plate, the one side fixedly connected with hydraulic oil cylinder of support plate, the output fixedly connected with pressure injection head of hydraulic oil cylinder. The utility model's advantage lies in: when drive rod does reciprocating motion with hydraulic oil cylinder, bellows hose can contract and expand with it, always keep covering to drive rod. Bellows hose forms closed protective space, can effectively block the metal dust, sand grain and so on impurity of foundry workshop and attach in drive rod surface, avoid the abrasion of drive rod and guide assembly caused by dust accumulation, reduce movement resistance and guide deviation, prevent dust from entering the inside of hydraulic oil cylinder and pollute hydraulic oil simultaneously, reduce the trouble risk such as oil cylinder jam, pressure instability, guarantee the stability of pressure injection process, prolong the service life of mechanism.

Description

Technical Field

[0001] This utility model relates to the field of injection mechanism technology, and in particular to a hydraulic cylinder injection mechanism for a casting machine. Background Technology

[0002] The hydraulic cylinder injection mechanism in a casting machine is a core actuator in casting equipment (especially die-casting machines) that achieves high-pressure filling of molten metal. It can be defined as: a mechanism that uses a hydraulic cylinder as a power source, converts hydraulic energy into mechanical energy through a mechanical transmission structure, and drives an injection rod to apply pressure to the molten metal and press it into the mold cavity at high speed. Specifically, this mechanism typically consists of a hydraulic cylinder, an injection rod (drive rod), a guide assembly, a control valve group, and a connecting bracket. The hydraulic cylinder provides the power output, and the injection rod, as the key component for force transmission, is connected at one end to the cylinder piston and at the other end to the pressure chamber or punch. The extension and retraction of the cylinder drives the injection rod to reciprocate, completing the metal suction and injection action.

[0003] Under certain casting conditions, the exposed portion of the injection rod may come into contact with dust, sand, and other impurities in the casting workshop, leading to increased friction between the drive rod and the guide sleeve, and accelerated wear on the rod surface. This can potentially affect the smoothness of movement and the accuracy of mold filling. Although existing technologies typically mitigate these problems through sealing devices or guide sleeves, there is still room for improvement in terms of enhancing protective effectiveness and reducing maintenance difficulty. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide a hydraulic cylinder injection mechanism for a casting machine to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of this utility model provides a hydraulic cylinder injection mechanism for a casting machine, including a casting machine body. A support plate is fixedly connected to one side of the casting machine body, and a feed pipe is fixedly connected to the side of the casting machine body near the support plate. A hydraulic cylinder is fixedly connected to one side of the support plate, and an injection head is fixedly connected to the output end of the hydraulic cylinder. The injection head is slidably connected to the feed pipe. An externally threaded pipe is fixedly connected to the cylinder body of the hydraulic cylinder, and the externally threaded pipe coincides with the axis of the hydraulic cylinder drive rod. The feed pipe is threaded with a threaded cap. A heat insulation plate is fixedly connected to the side of the feed pipe near the support plate. An assembly sleeve is slidably connected to the outer surface of the heat insulation plate. A corrugated hose is fixedly connected between the assembly sleeve and the threaded cap. The drive rod of the hydraulic cylinder is located inside the corrugated hose. Two symmetrically arranged L-shaped locking frames are rotatably connected to the outer surface of the assembly sleeve. A threaded post is threaded to one side of each L-shaped locking frame. One end of the threaded post is rotatably connected to a pressure plate through a bearing. The sides of the two pressure plates away from the casting machine body are in contact with the heat insulation plate.

[0007] By wrapping the hydraulic cylinder drive rod with a corrugated hose, a closed protective space is formed, effectively preventing the adhesion of dust, sand, and other impurities. This reduces friction and wear between the drive rod and the guide components, thereby improving the smoothness of the injection rod movement and the filling accuracy, and extending the service life of the mechanism. The design of a threaded cap and L-shaped locking bracket allows for quick installation and removal of the corrugated hose, facilitating cleaning, replacement, or maintenance of the drive rod, reducing downtime for maintenance and improving casting production efficiency.

[0008] Preferably, in any of the above solutions, the pressure plate is fixedly connected to two symmetrically arranged guide rods on the side near the threaded post, and the guide rods are slidably connected to the L-shaped locking frame.

[0009] Preferably, in any of the above schemes, the pressure plate is fixedly connected to two symmetrically arranged snap-fit ​​pins on the side away from the threaded post, and several of the snap-fit ​​pins are inserted into one side of the heat insulation plate.

[0010] Preferably, in any of the above embodiments, two symmetrically arranged connecting rods are embedded in the outer surface of the assembly sleeve, and the two L-shaped locking brackets are rotatably connected to the two connecting rods respectively.

[0011] Preferably, in any of the above embodiments, a sealing gasket is fixedly connected to the inner wall of the assembly sleeve, and a sealing groove is provided on one side of the heat insulation plate, wherein the sealing gasket is slidably connected to the heat insulation plate through the sealing groove.

[0012] Preferably, in any of the above embodiments, a hopper is fixedly installed on one side of the casting machine body, a feed inlet is provided through the top of the feed pipe, and the output end of the hopper corresponds to the feed inlet.

[0013] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0014] 1. During assembly, tighten the threaded cap onto the external threaded pipe to secure one end of the corrugated hose. Place the assembly sleeve over the heat insulation plate, rotate the L-shaped locking bracket to fit the assembly sleeve, and twist the threaded post to push the pressure plate against the heat insulation plate, securing the other end of the corrugated hose. At this point, the drive rod of the hydraulic cylinder is completely enclosed by the corrugated hose. As the drive rod reciprocates with the hydraulic cylinder, the corrugated hose expands and contracts accordingly, always maintaining coverage over the drive rod. The corrugated hose forms a closed protective space, effectively preventing metal dust, sand particles, and other impurities from the foundry from adhering to the surface of the drive rod, avoiding wear on the drive rod and guide components caused by dust accumulation, reducing movement resistance and guide deviation. Simultaneously, it prevents dust from entering the hydraulic cylinder and contaminating the hydraulic oil, reducing the risk of cylinder jamming, pressure instability, and other malfunctions, ensuring the stability of the injection process, and extending the service life of the mechanism.

[0015] 2. When disassembling the corrugated hose, first twist the threaded post in the opposite direction to disengage the pressure plate from the heat insulation plate. Then, rotate the L-shaped locking bracket to the open position to remove the assembly sleeve from the heat insulation plate. Next, rotate the threaded cap in the opposite direction to separate it from the external threaded tube, allowing the entire corrugated hose to be removed for cleaning, replacement, or inspection of the internal drive rod. The threaded connection and L-shaped locking bracket enable quick assembly and disassembly of the corrugated hose without the need for complex tools, simplifying the maintenance process. When the corrugated hose ages or accumulates a small amount of impurities, it can be easily disassembled for repair, avoiding the cumbersome, time-consuming, and labor-intensive disassembly of traditional fixed protective structures, reducing downtime for maintenance, and improving casting production efficiency. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the assembly of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the casting machine body of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the corrugated hose of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the L-shaped locking frame of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure at point A of this utility model.

[0022] In the diagram: 1-Casting machine body, 2-Support plate, 3-Feed pipe, 4-Hydraulic cylinder, 5-Injection head, 6-External threaded pipe, 7-Threaded cap, 8-Heat insulation plate, 9-Assembly sleeve, 10-Corrugated hose, 11-L-type locking frame, 12-Threaded column, 13-Pressure plate, 14-Guide rod, 15-Snap-fit ​​pin, 16-Connecting rod, 17-Sealing gasket, 18-Sealing groove, 19-Hopper, 20-Feed inlet. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0024] like Figures 1 to 6 As shown, a hydraulic cylinder injection mechanism for a casting machine includes a casting machine body 1. A support plate 2 is fixedly connected to one side of the casting machine body 1. A feed pipe 3 is fixedly connected to the side of the casting machine body 1 near the support plate 2. A hydraulic cylinder 4 is fixedly connected to one side of the support plate 2. An injection head 5 is fixedly connected to the output end of the hydraulic cylinder 4. The injection head 5 is slidably connected to the feed pipe 3. An external threaded pipe 6 is fixedly connected to the cylinder body of the hydraulic cylinder 4. The axis of the external threaded pipe 6 coincides with the axis of the drive rod of the hydraulic cylinder 4. A threaded cap 7 is threadedly connected to the outer surface of the external threaded pipe 6. The feed pipe... A heat insulation plate 8 is fixedly connected to one side of the support plate 2. An assembly sleeve 9 is slidably connected to the outer surface of the heat insulation plate 8. A corrugated hose 10 is fixedly connected between the assembly sleeve 9 and the threaded cover 7. The drive rod of the hydraulic cylinder 4 is located inside the corrugated hose 10. Two symmetrically arranged L-shaped locking frames 11 are rotatably connected to the outer surface of the assembly sleeve 9. A threaded post 12 is threadedly connected to one side of each L-shaped locking frame 11. One end of the threaded post 12 is rotatably connected to a pressure plate 13 through a bearing. The side of the two pressure plates 13 away from the casting machine body 1 is in contact with the heat insulation plate 8.

[0025] As an optional technical solution of this utility model, two symmetrically arranged guide rods 14 are fixedly connected to the side of the pressure plate 13 near the threaded post 12. The guide rods 14 are slidably connected to the L-shaped locking frame 11. When the threaded post 12 is twisted to drive the pressure plate 13 to move, it can guide and limit the movement direction of the pressure plate 13, prevent the pressure plate 13 from deviating or tilting during the force process, and ensure that the pressure plate 13 can fit smoothly and accurately with the heat insulation plate 8, thereby improving the stability of locking.

[0026] As an optional technical solution of this utility model, two symmetrically arranged snap-fit ​​pins 15 are fixedly connected to the side of the pressure plate 13 away from the threaded post 12. Several snap-fit ​​pins 15 are inserted into one side of the heat insulation plate 8. The snap-fit ​​pins 15 on the side of the pressure plate 13 away from the threaded post 12 are inserted into the side of the heat insulation plate 8, which can further enhance the connection between the pressure plate 13 and the heat insulation plate 8 when they are in contact, avoid the pressure plate 13 from loosening due to the vibration of the casting machine during operation, prevent gaps from appearing between the assembly sleeve 9 and the heat insulation plate 8, and ensure the sealing effect of the corrugated hose 10.

[0027] As an optional technical solution of this utility model, two symmetrically arranged connecting rods 16 are embedded in the outer surface of the assembly sleeve 9. Two L-shaped locking frames 11 are rotatably connected to the two connecting rods 16 respectively. The connecting rods 16 embedded in the outer surface of the assembly sleeve 9 are rotatably connected to the L-shaped locking frames 11, providing a stable rotation fulcrum for the L-shaped locking frames 11. This allows the L-shaped locking frames 11 to rotate flexibly to achieve locking or unlocking operations on the pressure plate 13, while ensuring the stability of the structure during rotation and preventing the L-shaped locking frames 11 from falling off or shifting.

[0028] As an optional technical solution of this utility model, a sealing gasket 17 is fixedly connected to the inner wall of the assembly sleeve 9, and a sealing groove 18 is opened on one side of the heat insulation plate 8. The sealing gasket 17 is slidably connected to the heat insulation plate 8 through the sealing groove 18. The sealing gasket 17 on the inner wall of the assembly sleeve 9 is slidably connected to the sealing groove 18 on one side of the heat insulation plate 8, which can effectively enhance the sealing between the assembly sleeve 9 and the heat insulation plate 8, prevent dust and impurities from entering the corrugated hose 10 from the gap between the two and contaminating the drive rod of the hydraulic cylinder 4, further improve the protection effect, and reduce the wear and failure risk of the drive rod.

[0029] As an optional technical solution of this utility model, a hopper 19 is fixedly installed on one side of the casting machine body 1, and a feed inlet 20 is opened through the top of the feed pipe 3. The output end of the hopper 19 corresponds to the feed inlet 20. The output end of the hopper 19 on one side of the casting machine body 1 corresponds to the feed inlet 20 at the top of the feed pipe 3, which can realize the stable delivery of molten metal into the feed pipe 3, ensure the continuity and quantitativeity of molten metal supply, avoid molten metal overflow causing waste or affecting the normal operation of the casting machine, and improve the working efficiency of the injection mechanism.

[0030] A hydraulic cylinder injection mechanism for a casting machine operates on the following principle:

[0031] 1): During assembly, tighten the threaded cap 7 onto the external threaded tube 6 to fix one end of the corrugated hose 10.

[0032] 2): Rotate the L-shaped locking bracket 11 to fit the assembly sleeve 9, twist the threaded column 12 to push the pressure plate 13 to press the heat insulation plate 8, and fix the other end of the corrugated hose 10.

[0033] 3): The drive rod of the hydraulic cylinder 4 is completely wrapped by the corrugated hose 10; when the drive rod reciprocates with the hydraulic cylinder 4, the corrugated hose 10 can extend and retract with it, always keeping the drive rod covered.

[0034] In summary, during assembly of the hydraulic cylinder injection mechanism for this casting machine, the threaded cap 7 is screwed onto the external threaded pipe 6 to fix one end of the corrugated hose 10; the assembly sleeve 9 is placed over the heat insulation plate 8, the L-shaped locking bracket 11 is rotated to fit the assembly sleeve 9, and the threaded column 12 is twisted to push the pressure plate 13 to press the heat insulation plate 8, thus fixing the other end of the corrugated hose 10. At this time, the drive rod of the hydraulic cylinder 4 is completely wrapped by the corrugated hose 10; when the drive rod reciprocates with the hydraulic cylinder 4, the corrugated hose 10 can extend and retract with it, always maintaining coverage of the drive rod. The corrugated hose 10 forms a closed protective space, which can effectively block metal dust, sand particles and other impurities in the foundry workshop from adhering to the surface of the drive rod, avoiding wear of the drive rod and guide components caused by dust accumulation, reducing motion resistance and guide deviation; at the same time, it prevents dust from entering the hydraulic cylinder 4 and contaminating the hydraulic oil, reducing the risk of cylinder jamming, pressure instability and other failures, ensuring the stability of the injection process, and extending the service life of the mechanism. When the corrugated hose 10 needs to be disassembled, first twist the threaded column 12 in the opposite direction to disengage the pressure plate 13 from the heat insulation plate 8, rotate the L-shaped locking bracket 11 to the open position, and the assembly sleeve 9 can be removed from the heat insulation plate 8; then rotate the threaded cover 7 in the opposite direction to separate it from the external threaded tube 6, and the corrugated hose 10 can be removed as a whole for cleaning, replacement or internal drive rod repair. The corrugated hose 10 can be quickly disassembled and assembled by means of threaded connection and L-shaped locking bracket 11, without complicated tools, which simplifies the maintenance process. When the corrugated hose 10 is aged or has a small amount of impurities inside, it can be easily disassembled and handled, avoiding the cumbersome, time-consuming and labor-intensive problem of disassembling traditional fixed protective structures, reducing downtime maintenance time and improving casting production efficiency.

Claims

1. A hydraulic cylinder injection mechanism for a casting machine, characterized in that: The casting machine includes a casting machine body (1), a support plate (2) fixedly connected to one side of the casting machine body (1), a feed pipe (3) fixedly connected to the side of the casting machine body (1) near the support plate (2), a hydraulic cylinder (4) fixedly connected to one side of the support plate (2), an injection head (5) fixedly connected to the output end of the hydraulic cylinder (4), the injection head (5) being slidably connected to the feed pipe (3), an external threaded pipe (6) fixedly connected to the cylinder body of the hydraulic cylinder (4), the external threaded pipe (6) being aligned with the axis of the drive rod of the hydraulic cylinder (4), a threaded cap (7) being threadedly connected to the outer surface of the external threaded pipe (6), and the feed pipe (3) being close to the support plate. (2) is fixedly connected to one side of a heat insulation plate (8), and an assembly sleeve (9) is slidably connected to the outer surface of the heat insulation plate (8). A corrugated hose (10) is fixedly connected between the assembly sleeve (9) and the threaded cover (7). The drive rod of the hydraulic cylinder (4) is located inside the corrugated hose (10). Two symmetrically arranged L-shaped locking frames (11) are rotatably connected to the outer surface of the assembly sleeve (9). A threaded post (12) is threadedly connected to one side of each L-shaped locking frame (11). One end of the threaded post (12) is rotatably connected to a pressure plate (13) through a bearing. The side of the two pressure plates (13) away from the casting machine body (1) is in contact with the heat insulation plate (8).

2. The hydraulic cylinder injection mechanism for a casting machine according to claim 1, characterized in that: The pressure plate (13) is fixedly connected to two symmetrically arranged guide rods (14) on the side near the threaded post (12), and the guide rods (14) are slidably connected to the L-shaped locking frame (11).

3. The hydraulic cylinder injection mechanism for a casting machine according to claim 2, characterized in that: The pressure plate (13) is fixedly connected to two symmetrically arranged snap-fit ​​pins (15) on the side away from the threaded post (12), and several of the snap-fit ​​pins (15) are inserted into one side of the heat insulation plate (8).

4. The hydraulic cylinder injection mechanism for a casting machine according to claim 3, characterized in that: Two symmetrically arranged connecting rods (16) are embedded in the outer surface of the assembly sleeve (9), and the two L-shaped locking brackets (11) are rotatably connected to the two connecting rods (16) respectively.

5. The hydraulic cylinder injection mechanism for a casting machine according to claim 4, characterized in that: The inner wall of the assembly sleeve (9) is fixedly connected with a sealing gasket (17), and a sealing groove (18) is provided on one side of the heat insulation plate (8). The sealing gasket (17) is slidably connected to the heat insulation plate (8) through the sealing groove (18).

6. The hydraulic cylinder injection mechanism for a casting machine according to claim 5, characterized in that: A hopper (19) is fixedly installed on one side of the casting machine body (1), and a feed inlet (20) is opened through the top of the feed pipe (3). The output end of the hopper (19) corresponds to the feed inlet (20).

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