Lubricating structure for pull rod of movable template

Abstract

The utility model discloses a movable template pull rod lubricating structure, which relates to the technical field of lubricating structures, comprises a movable template and a pull rod, and can respectively form radial sealing for the pull rod and sealing for the end part of a pull rod shaft sleeve through a radial sealing ring and an end surface sealing ring which are arranged on a dust seal gland. A closed space can be formed on the two sides of the pull rod shaft sleeve through mutual matching of the radial sealing ring and the end face sealing ring, so that lubricating oil can be effectively prevented from overflowing from the dust seal gland and the movable mold plate, and it is guaranteed that the device can effectively lubricate the pull rod in the movement process for a long time; the filler block 7 made of graphite is embedded in the pull rod shaft sleeve, so that the lubricating property of the pull rod shaft sleeve 4 in contact with the pull rod 2 can be further improved by utilizing the natural lubricating property generated by a layered structure of graphite, the resistance is smaller when the movable mold plate moves along the pull rod, the damage caused by friction and the generated heat are reduced, and the service life of the movable mold plate is prolonged. And the service life of the device is further prolonged.

Description

Technical Field

[0001] This utility model relates to the field of lubrication structure technology, specifically to a lubrication structure for a moving template tie rod. Background Technology

[0002] An injection molding machine is a device that melts plastic granules, applies high pressure, and injects them to fill the mold cavity. One half of the mold is fixed to a stationary platen, and the other half is fixed to a moving platen. When the mold closes, a mold cavity is formed, and the molten plastic granules are injected. After pressure holding and cooling, the moving platen moves, the mold separates, and the product is ejected from the mold cavity. Then, the next cycle begins. In each cycle, the moving platen moves twice on the tie rod during the opening and closing motion. Therefore, a lubrication structure is often designed here to ensure smooth movement of the moving platen on the tie rod. A dust seal cap is also often installed on the lubrication structure to achieve a dustproof and sealing effect.

[0003] However, most existing lubrication structures between the moving template and the tie rod may experience issues during use (e.g.) Figure 1 As shown, although it can provide lubrication, there is no seal between the dust seal cover and the moving template. Therefore, the lubricating oil will overflow from the dust seal cover, thus reducing the lubrication effect. When the lubricating oil drips into the product at the feed port, it will also affect the product quality. In addition, most lubrication structures use tin bronze as the material to ensure the lubrication effect, which is costly. Utility Model Content

[0004] The purpose of this utility model is to provide a lubrication structure for a moving template tie rod, so as to solve the technical problem that in most existing moving template tie rod lubrication structures, lubricating oil easily overflows from between the dust seal cover and the moving template during use.

[0005] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0006] A lubrication structure for a moving template tie rod.

[0007] It includes a movable template and tie rods, with the tie rods located at the four corners of the movable template, and the movable template can slide along the direction of the tie rods;

[0008] The moving template and the tie rod are equipped with a lubrication sleeve assembly. The lubrication sleeve assembly has a tie rod bushing sleeve fitted on the outside of the tie rod inside. Both ends of the lubrication sleeve assembly are provided with dust sealing caps to form a seal on the end face of the lubrication sleeve assembly. A radial sealing ring is provided on the contact end face of the dust sealing cap and the tie rod, and an end face sealing ring is provided on the contact end face of the dust sealing cap and the tie rod bushing.

[0009] As a further embodiment of this utility model: the lubrication sleeve assembly has a fixing groove inside that matches the tie rod bushing, and the dust seal cover has an annular limiting groove for installing the radial sealing ring and the end face sealing ring.

[0010] As a further embodiment of this utility model, the material of the tie rod bushing is zinc alloy.

[0011] As a further embodiment of this utility model: oil storage ring grooves are symmetrically formed on both the inner and outer walls of the middle part of the tie rod bushing, a through groove is formed on the outer wall of the oil storage ring groove, and several sets of packing blocks are fitted into the outer wall of the tie rod bushing.

[0012] As a further embodiment of this utility model: the inner side of the tie rod bushing is provided with several sets of reserved grooves, and the reserved grooves are located on both sides of the oil storage ring groove. The reserved grooves are used to place the packing block.

[0013] As a further embodiment of this invention, the filler block is made of graphite particles.

[0014] As a further embodiment of this utility model: the lubrication sleeve is provided with a straight connector for injecting lubricating oil, and the output end of the straight connector is connected to the oil storage ring groove.

[0015] As a further embodiment of this utility model, the dust seal cover is provided with positioning screws for fixing.

[0016] The beneficial effects of this utility model are:

[0017] In this invention, the radial sealing ring and the end face sealing ring set on the dust seal cover can respectively form a radial seal on the pull rod and a seal on the end of the pull rod bushing. The cooperation between the radial sealing ring and the end face sealing ring can form a sealed space on both sides of the pull rod bushing, thereby effectively preventing lubricating oil from overflowing from the dust seal cover and the moving template. This ensures that the device can effectively lubricate the outer wall of the pull rod during long-term operation. In addition, a graphite filler block 7 is embedded on the pull rod bushing. The natural lubricity generated by the layered structure of graphite can further improve the lubricity when the pull rod bushing 4 and the pull rod 2 are in contact. This reduces the resistance when the moving template moves along the pull rod, reduces the damage caused by friction and the heat generated, and further extends the service life of the device. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the existing lubrication structure for the moving template;

[0020] Figure 2This is a three-dimensional schematic diagram of the device in this utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the device in this utility model;

[0022] Figure 4 This is a schematic diagram of the lubrication component structure in this utility model;

[0023] Figure 5 This is a three-dimensional schematic diagram of the tie rod bushing in this utility model.

[0024] In the diagram: 1. Moving template; 2. Tie rod; 3. Lubrication sleeve; 4. Tie rod bushing; 5. Oil reservoir ring groove; 6. Connecting groove; 7. Packing block; 8. Dust seal gland; 9. Radial seal ring; 10. End face seal ring; 11. Straight connector; 12. Positioning screw. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 2-5 As shown, a lubrication structure for a moving template tie rod.

[0027] It includes a movable template 1 and a tie rod 2, with the tie rod 2 located at the four corners of the movable template 1, and the movable template 1 can slide along the direction of the tie rod 2;

[0028] The movable template 1 is equipped with a lubrication sleeve 3 between the pull rod 2 and the movable template 1. Inside the lubrication sleeve 3 is a pull rod bushing 4 fitted onto the outside of the pull rod 2. Both ends of the lubrication sleeve 3 are equipped with dust sealing caps 8 to seal the end faces of the lubrication sleeve 3. Radial sealing rings 9 are provided on the contact surfaces of the dust sealing caps 8 and the pull rod 2, and end face sealing rings 10 are provided on the contact surfaces of the dust sealing caps 8 and the pull rod bushing 4. When the movable template 1 slides along the pull rod 2, the outer wall of the pull rod 2 contacts the inner wall of the pull rod bushing 4. Lubricating oil is injected into the pull rod bushing 4 to lubricate the outer wall of the pull rod 2, resulting in less resistance and reduced damage caused by friction when the movable template 1 moves along the pull rod 2. The heat generated further extends the service life of the device. The radial sealing ring 9 on the dust seal cover 8 is pressed against the outer wall of the pull rod 2, thereby forming a radial seal between them and the pull rod 2, preventing lubricating oil from leaking from the contact surface between the dust seal cover 8 and the pull rod 2. The end face sealing ring 10 on the dust seal cover 8 is pressed against the end face of the pull rod bushing 4, thereby forming a seal at the end of the pull rod bushing 4. Through the cooperation of the radial sealing ring 9 and the end face sealing ring 10, a sealed space can be formed on both sides of the pull rod bushing 4, thereby effectively preventing lubricating oil from overflowing from the dust seal cover 8 and the moving template 1, ensuring that the device can effectively lubricate the outer wall of the pull rod 2 during operation for a long time.

[0029] In this embodiment, specifically, the lubrication sleeve 3 has a fixing groove inside that matches the tie rod bushing 4, and the dust seal cover 8 has an annular limiting groove for installing the radial sealing ring 9 and the end face sealing ring 10.

[0030] In this embodiment, the tie rod bushing 4 is made of zinc alloy. The cost of zinc alloy is much lower than that of tin bronze. Using it as the material for tie rod bushing 4 greatly reduces the overall manufacturing cost of the device and facilitates mass production.

[0031] In this embodiment, specifically, oil storage annular grooves 5 are symmetrically formed on both the inner and outer walls of the middle part of the tie rod bushing 4. The oil storage annular groove 5 on the outer wall can guide the lubricating oil, so that the lubricating oil can flow evenly along the annular oil storage annular groove 5 to the oil storage annular groove 5 on the inner wall, thereby achieving uniform coverage of the lubricating oil on the outer wall of the tie rod 2. The oil storage annular groove 5 on the inner wall can also store lubricating oil, so as to continuously lubricate the tie rod 2. A connecting groove 6 is formed through the outer wall of the oil storage annular groove 5. The connecting groove 6 is used to connect the oil storage annular groove 5 on the outer wall. The lubricating oil in the oil reservoir 5 is introduced into the oil reservoir 5 opened on the inner wall. Several sets of packing blocks 7 are fitted into the outer wall of the tie rod bushing 4. Several sets of reserved grooves are opened on the inner side of the tie rod bushing 4, and the reserved grooves are located on both sides of the oil reservoir 5. The reserved grooves are used to place the packing blocks 7. The material of the packing blocks 7 is graphite particles. The graphite packing blocks 7 are fitted into the outer wall of the tie rod bushing 4. The natural lubricity generated by the layered structure of graphite can further improve the lubricity when the tie rod bushing 4 contacts the tie rod 2.

[0032] In this embodiment, specifically, the lubrication sleeve 3 is provided with a straight connector 11 for injecting lubricating oil, and the output end of the straight connector 11 is connected to the oil storage ring groove 5. The straight connector 11 is used to inject lubricating oil into the oil storage ring groove 5.

[0033] In this embodiment, specifically, the dust seal cover 8 is provided with positioning screws 12 for fixing. The positioning screws 12 can fix the dust seal cover 8 to both ends of the lubrication sleeve 3, ensuring the stability of the dust seal cover 8 when the device is in use.

[0034] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A movable die plate pull rod lubrication structure, characterized in that: it comprises a movable die plate (1) and a pull rod (2), and the pull rod (2) is located at the four corners of the movable die plate (1), and the movable die plate (1) can slide along the direction of the pull rod (2); wherein, a lubrication sleeve set (3) is arranged between the movable die plate (1) and the pull rod (2), the inside of the lubrication sleeve set (3) is provided with a pull rod shaft sleeve (4) sleeved outside the pull rod (2), both ends of the lubrication sleeve set (3) are provided with dust seal gland (8) for forming a seal on the end face of the lubrication sleeve set (3), the contact end face of the dust seal gland (8) and the pull rod (2) is provided with a radial seal ring (9), and the contact end face of the dust seal gland (8) and the pull rod shaft sleeve (4) is provided with an end face seal ring (10). The inside of the lubrication sleeve set (3) is provided with a fixed groove matched with the pull rod shaft sleeve (4), and the dust seal gland (8) is provided with an annular limiting groove for installing the radial seal ring (9) and the end face seal ring (10). The material of the pull rod shaft sleeve (4) is zinc alloy.

2. The lubricating structure of a draw rod of a movable die plate according to claim 1, wherein The inside and outside walls of the middle part of the pull rod shaft sleeve (4) are symmetrically provided with oil storage ring grooves (5), the outer wall of the oil storage ring groove (5) is provided with a communication groove (6), and the outer wall of the pull rod shaft sleeve (4) is embedded with a plurality of groups of filler blocks (7).

3. The lubricating structure of a draw rod of a movable die plate according to claim 1, wherein The inside of the pull rod shaft sleeve (4) is provided with a plurality of groups of reserved grooves, and the reserved grooves are located on both sides of the oil storage ring groove (5), and the reserved grooves are used for placing the filler blocks (7).

4. The lubricating structure of a draw rod of a movable die plate according to claim 1, wherein The material of the filler block (7) is graphite particles.

5. A moving die plate tie rod lubrication structure according to claim 4, wherein The lubrication sleeve set (3) is provided with a straight-through joint (11) for injecting lubricating oil, and the output end of the straight-through joint (11) is communicated with the oil storage ring groove (5).

6. A movable die plate tie rod lubrication structure according to claim 4, wherein The dust seal gland (8) is provided with a positioning screw (12) for fixing.

7. The moving die plate tie rod lubrication structure according to claim 4, wherein ​ 8. The moving die plate pull rod lubricating structure according to claim 1, wherein ​

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