Built-in oil cylinder for injection molding machine

Abstract

The utility model discloses a built-in oil cylinder for an injection molding machine, and relates to the technical field of oil cylinders of injection molding machines, the built-in oil cylinder comprises an oil cylinder assembly, one side of the oil cylinder assembly is provided with a mounting mechanism, a plurality of top plates are arranged in a sealing piston, when the sealing piston is ejected out of the oil cylinder body to move, the sealing piston is pushed out of the oil cylinder body under the action of the elastic force of a spring; the connecting rod is driven to slide on the supporting frame, the top plate is pushed to be attached to the inner side of the sealing piston, the sealing piston is extruded outwards, the outer surface of the sealing piston is attached to the inner ring face of the ejection oil cylinder body all the time, and therefore the sealing performance in the ejection oil cylinder body is improved, and the situation that the outer portion of the sealing piston is abraded unevenly is prevented. Oil leakage is prevented; by rotating the threaded rod, the two mounting sleeve plates move to sequentially drive the movable plate and the fixed plates to move, the two fixed plates are matched to fix the oil conveying pipe, and the situation that the oil conveying pipe moves after being mounted, and oil leaks at the joint of the connector is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machine cylinders, in particular to an internal cylinder for an injection molding machine. Background Technique

[0002] When using an injection molding machine to process workpieces, after the workpieces are injection molded in the mold, an oil cylinder is needed to provide power to push the products out of the mold.

[0003] As disclosed in the publication number CN210100605U, an internal cylinder for an injection molding machine is disclosed, which includes a cylinder body, a piston rod and a piston. The piston rod divides the space inside the cylinder body into a first cavity and a second cavity. The cylinder body is provided with a first oil hole and a second oil hole. A ejection rod is arranged in the second cavity. An air cavity is arranged on the piston rod. The ejection rod passes through the piston and is inserted into the air cavity, so that the piston forms a sliding fit relative to the ejection rod. A channel is arranged on the ejection rod, and the cylinder body is provided with a second channel communicating with the outside.

[0004] In the prior art, during the operation of the oil cylinder, the piston moves inside the cylinder body, and the sealing part on the outer ring of the piston rubs against the inner wall of the cylinder body. When the movement path of the piston has a slight deviation, the wear on the outer surface of the piston is uneven, resulting in oil leakage inside the hydraulic cylinder and affecting the service life of the oil cylinder. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem of uneven wear on the outer surface of the piston in the prior art, resulting in oil leakage inside the hydraulic cylinder, and to propose an internal cylinder for an injection molding machine.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: an internal cylinder for an injection molding machine, including an oil cylinder assembly, an installation mechanism is installed on one side of the oil cylinder assembly. The oil cylinder assembly includes an ejection oil cylinder body. A plug is installed on the outer surface of the ejection oil cylinder body. One end of the ejection oil cylinder body is fixedly connected with an ejection front cover. An interface is fixedly communicated with the outer surface of the ejection front cover. A sealing mechanism is slidably connected inside the ejection oil cylinder body. The sealing mechanism includes a sealing piston. A support frame is fixedly connected inside the sealing piston. A moving block is slidably connected to one side of the support frame. One end of the moving block is fixedly connected with a connecting rod. One end of the connecting rod is fixedly connected with a top plate.

[0007] Preferably, a spring is sleeved outside the connecting rod, and the two ends of the spring are respectively arranged at one end of the moving block and one end of the support frame.

[0008] Preferably, an annular groove is opened on the outer surface of the sealing piston.

[0009] Preferably, a jacking piston rod is slidably connected to the middle of the jacking front cover, and one end of the jacking piston rod is fixedly connected to one end of the sealing piston.

[0010] Preferably, a jacking rear cover is installed at one end of the jacking oil cylinder body.

[0011] Preferably, the installation mechanism includes an oil delivery pipe, one end of the oil delivery pipe is sleeved on one end of the interface, and a fixing plate is lapped on the outer surface of the oil delivery pipe.

[0012] Preferably, an anti-slip strip is fixedly connected to the inner ring surface of the fixing plate.

[0013] Preferably, a moving plate is fixedly connected to the outer surface of the fixing plate, one end of the moving plate is fixedly connected to an installation sleeve plate, and one end of the installation sleeve plate is threadedly connected to a threaded rod.

[0014] Preferably, the middle of the threaded rod is rotatably connected to a fixing block, and one end of the fixing block is fixedly connected to the outer surface of the interface.

[0015] Preferably, a guide rod is slidably connected to the other end of the installation sleeve plate, and the middle of the guide rod is fixedly connected to the outside of the interface.

[0016] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0017] 1. In the present utility model, a plurality of top plates are arranged inside the sealing piston. When the sealing piston moves inside the jacking oil cylinder body, under the action of the spring elasticity, the connecting rod is driven to slide on the support frame, and the top plate is pushed to keep fitting with the inner side of the sealing piston. The sealing piston is extruded outwards, so that the outer surface of the sealing piston always fits with the inner ring surface of the jacking oil cylinder body, thereby improving the sealing performance inside the jacking oil cylinder body, preventing uneven wear on the outside of the sealing piston, and preventing oil leakage.

[0018] 2. In the present utility model, by rotating the threaded rod, the two installation sleeve plates move, successively driving the moving plate and the fixing plate to move. The two fixing plates cooperate to fix the oil delivery pipe, preventing the oil delivery pipe from moving after installation and causing oil leakage at the connection of the interface. Description of the Drawings

[0019] Figure 1 is a three-dimensional structural schematic diagram of an in-built oil cylinder for an injection molding machine proposed by the present utility model;

[0020] Figure 2 is a partial sectional structural schematic diagram of an in-built oil cylinder for an injection molding machine proposed by the present utility model;

[0021] Figure 3The present utility model provides a schematic sectional structure diagram of a sealing mechanism for an in-built oil cylinder of an injection molding machine;

[0022] Figure 4 The present utility model provides a schematic structure diagram of a top plate connection structure for an in-built oil cylinder of an injection molding machine;

[0023] Figure 5 The present utility model provides a schematic internal planar structure diagram of an in-built oil cylinder of an injection molding machine;

[0024] Figure 6 The present utility model provides a schematic connection structure diagram of an installation mechanism for an in-built oil cylinder of an injection molding machine.

[0025] Legend: 1. Oil cylinder assembly; 11. Ejector oil cylinder body; 12. Ejector front cover; 13. Ejector piston rod; 14. Ejector rear cover; 15. Interface; 16. Plug; 2. Installation mechanism; 21. Fixed plate; 22. Fixed block; 23. Threaded rod; 24. Installation sleeve plate; 25. Moving plate; 26. Oil pipeline; 27. Anti-slip strip; 28. Guide rod; 3. Sealing mechanism; 31. Sealing piston; 32. Top plate; 33. Support frame; 34. Annular groove; 35. Connecting rod; 36. Moving block; 37. Spring. Detailed implementation manners

[0026] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0027] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0028] Embodiment 1: As Figure 1 - Figure 6As shown in the figure, the utility model provides an internal oil cylinder for an injection molding machine, which includes an oil cylinder assembly 1. An installation mechanism 2 is installed on one side of the oil cylinder assembly 1. The oil cylinder assembly 1 includes an ejection oil cylinder body 11. A plug 16 is installed on the outer surface of the ejection oil cylinder body 11. One end of the ejection oil cylinder body 11 is fixedly connected to an ejection front cover 12. An interface 15 is fixedly communicated with the outer surface of the ejection front cover 12. A sealing mechanism 3 is slidably connected inside the ejection oil cylinder body 11. The sealing mechanism 3 includes a sealing piston 31. A support frame 33 is fixedly connected inside the sealing piston 31. A moving block 36 is slidably connected to one side of the support frame 33. One end of the moving block 36 is fixedly connected to a connecting rod 35. One end of the connecting rod 35 is fixedly connected to a top plate 32. A spring 37 is sleeved outside the connecting rod 35. Two ends of the spring 37 are respectively arranged at one end of the moving block 36 and one end of the support frame 33. An annular groove 34 is formed on the outer surface of the sealing piston 31. An ejection piston rod 13 is slidably connected to the middle of the ejection front cover 12. One end of the ejection piston rod 13 is fixedly connected to one end of the sealing piston 31. An ejection rear cover 14 is installed at one end of the ejection oil cylinder body 11.

[0029] By arranging a plurality of top plates 32 inside the sealing piston 31, when the sealing piston 31 moves inside the ejection oil cylinder body 11, under the elastic force of the spring 37 in a compressed state, the connecting rod 35 is driven to slide on the support frame 33, and the moving block 36 slides inside the support frame 33, so that the connecting rod 35 makes a linear motion. The connecting rod 35 moves to push the top plate 32 to keep fitting with the inner side of the sealing piston 31. The sealing piston 31 is extruded outwards, so that the outer surface of the sealing piston 31 always fits with the inner ring surface of the ejection oil cylinder body 11, thereby improving the sealing performance inside the ejection oil cylinder body 11 and preventing oil leakage. At the same time, a plurality of annular grooves 34 are formed on the outer surface of the sealing piston 31 to reduce the friction and wear of the sealing piston 31 when moving on the inner ring surface of the ejection oil cylinder body 11. Interfaces 15 are installed on both sides of the ejection front cover 12. The oil circuit passes through the ejection rear cover 14 and the ejection oil cylinder body 11 and then reaches the inside of the ejection front cover 12. The two interfaces 15 are integrally installed on both sides of the ejection front cover 12, reducing the occupied area at the ejection rear cover 14, facilitating the internal installation of the oil cylinder assembly 1 inside the template of the injection molding machine, and reducing the overall length of the machine.

[0030] Embodiment 2: As Figure 1 、 Figure 2 and Figure 6As shown in the figure, the installation mechanism 2 includes an oil pipeline 26. One end of the oil pipeline 26 is sleeved on one end of the interface 15, and a fixing plate 21 is lapped on the outer surface of the oil pipeline 26; an anti-slip strip 27 is fixedly connected to the inner ring surface of the fixing plate 21; a moving plate 25 is fixedly connected to the outer surface of the fixing plate 21, and one end of the moving plate 25 is fixedly connected to an installation sleeve plate 24. One end of the installation sleeve plate 24 is threadedly connected to a threaded rod 23; the middle of the threaded rod 23 is rotatably connected to a fixing block 22, and one end of the fixing block 22 is fixedly connected to the outer surface of the interface 15; the other end of the installation sleeve plate 24 is slidably connected to a guide rod 28, and the middle of the guide rod 28 is fixedly connected to the outside of the interface 15.

[0031] By installing two oil pipelines 26 at one end of the interface 15 and rotating the threaded rod 23, the threads on both sides of the threaded rod 23 located on both sides of the fixing block 22 are set in opposite directions. The two installation sleeve plates 24 move, and the installation sleeve plates 24 slide on the outside of the guide rod 28, which can fix the movement path of the installation sleeve plates 24. The movement of the installation sleeve plates 24 drives the moving plate 25 and the fixing plate 21 to move in sequence. The two fixing plates 21 cooperate to fix the oil pipeline 26, and an anti-slip strip 27 is provided at the joint between the fixing plate 21 and the oil pipeline 26 to increase the friction between the fixing plate 21 and the oil pipeline 26 and prevent the oil pipeline 26 from moving after installation, resulting in oil leakage at the connection of the interface 15.

[0032] The usage method and working principle of this device: When the sealing piston 31 moves inside the ejection cylinder body 11, under the elastic force of the spring 37, the connecting rod 35 is driven to slide on the support frame 33, and the top plate 32 is pushed to keep in contact with the inner side of the sealing piston 31. The sealing piston 31 is extruded outward, so that the outer surface of the sealing piston 31 always contacts the inner ring surface of the ejection cylinder body 11, improving the sealing performance inside the ejection cylinder body 11. Interfaces 15 are installed on both sides of the ejection front cover 12. The oil circuit passes through the ejection rear cover 14 and the ejection cylinder body 11 and then reaches the inside of the ejection front cover 12. The two interfaces 15 are integrally installed on both sides of the ejection front cover 12, reducing the occupied area at the ejection rear cover 14. The oil cylinder assembly 1 is placed inside the template of the injection molding machine. By installing two oil pipelines 26 at one end of the interface 15 and rotating the threaded rod 23, the two installation sleeve plates 24 move, driving the moving plate 25 and the fixing plate 21 to move in sequence. The two fixing plates 21 cooperate to fix the oil pipeline 26.

[0033] The above is only a preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An internal oil cylinder for an injection molding machine, comprising an oil cylinder assembly (1), characterized in that: An installation mechanism (2) is installed on one side of the oil cylinder assembly (1). The oil cylinder assembly (1) includes an ejection oil cylinder body (11). A plug (16) is installed on the outer surface of the ejection oil cylinder body (11). One end of the ejection oil cylinder body (11) is fixedly connected to an ejection front cover (12). An interface (15) is fixedly communicated with the outer surface of the ejection front cover (12). A sealing mechanism (3) is slidably connected inside the ejection oil cylinder body (11). The sealing mechanism (3) includes a sealing piston (31). A support frame (33) is fixedly connected inside the sealing piston (31). A moving block (36) is slidably connected to one side of the support frame (33). One end of the moving block (36) is fixedly connected to a connecting rod (35). One end of the connecting rod (35) is fixedly connected to a top plate (32).

2. The built-in oil cylinder for an injection molding machine according to claim 1, wherein: A spring (37) is sleeved outside the connecting rod (35). The two ends of the spring (37) are respectively arranged at one end of the moving block (36) and one end of the support frame (33).

3. The built-in oil cylinder for an injection molding machine according to claim 1, wherein: An annular groove (34) is formed on the outer surface of the sealing piston (31).

4. An internal oil cylinder for an injection molding machine according to claim 1, characterized in that: An ejection piston rod (13) is slidably connected to the middle of the ejection front cover (12). One end of the ejection piston rod (13) is fixedly connected to one end of the sealing piston (31).

5. The built-in oil cylinder for an injection molding machine according to claim 1, characterized in that: An ejection rear cover (14) is installed at one end of the ejection oil cylinder body (11).

6. The built-in oil cylinder for an injection molding machine according to claim 1, wherein: The installation mechanism (2) includes an oil delivery pipe (26). One end of the oil delivery pipe (26) is sleeved on one end of the interface (15). A fixing plate (21) is lapped on the outer surface of the oil delivery pipe (26).

7. An internal oil cylinder for an injection molding machine according to claim 6, characterized in that: An anti-slip strip (27) is fixedly connected to the inner ring surface of the fixing plate (21).

8. An internal oil cylinder for an injection molding machine according to claim 6, characterized in that: A moving plate (25) is fixedly connected to the outer surface of the fixing plate (21). One end of the moving plate (25) is fixedly connected to an installation sleeve plate (24). One end of the installation sleeve plate (24) is threadedly connected to a threaded rod (23).

9. The built-in oil cylinder for an injection molding machine according to claim 8, wherein: The middle of the threaded rod (23) is rotatably connected to a fixing block (22). One end of the fixing block (22) is fixedly connected to the outer surface of the interface (15).

10. The built-in oil cylinder for an injection molding machine according to claim 8, characterized in that: A guide rod (28) is slidably connected to the other end of the installation sleeve plate (24). The middle of the guide rod (28) is fixedly connected to the outside of the interface (15).

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