Movable template pull rod oil seal structure

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a movable mold plate pull rod oil seal structure which comprises a movable mold plate, a pull rod and an oil seal mechanism, a plurality of sliding grooves are formed in the movable mold plate, and the pull rod is in sliding fit with the sliding grooves; the oil seal mechanism comprises an oil seal ring, copper bushes and a dust seal gland, the copper bushes are arranged on the pull rod in a sleeving mode, the copper bushes are arranged at the two ends, located in the sliding groove, of the pull rod, and a plurality of through holes are formed in the copper bushes; an oil injection port is formed in the movable mold plate and is communicated with the through hole; the oil seal ring is arranged on one side of the copper sleeve and arranged on the pull rod in a sleeving mode, and the dust seal glands are fixedly arranged at the two ends of the movable mold plate to limit the oil seal ring. The pull rod is sleeved with the oil seal ring, the sealing ring on the oil seal ring is in close contact with the peripheral wall of the pull rod, an effective sealing barrier is formed, meanwhile, the tightness degree between the sealing ring and the pull rod is enhanced through the clamping spring, the sealing performance is improved, the cross section of the sealing ring is of an inverted triangle structure, contact pressure is distributed reasonably, and boundary lubrication is achieved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically a moving template tie rod oil seal structure. Background Technology

[0002] Tie rods are crucial high-rigidity elastic components in the clamping mechanism of injection molding machines, generating clamping forces and directly affecting the operational reliability and service life of the clamping mechanism. During the operation of the injection molding machine, tie rods need to withstand enormous pressure and friction, making their sealing and lubrication performance paramount.

[0003] Most existing oil seal assemblies use oil seal rings made of rubber or elastic materials, which achieve sealing through tight contact between their lips and the pull rod.

[0004] However, in actual operation, the following shortcomings exist: unstable sealing performance and poor lubrication effect; and these problems may cause wear and oil leakage of the tie rod during sliding, which in turn affects the normal operation and accuracy of the injection molding machine. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a moving template tie rod oil seal structure, which solves problems such as unstable sealing performance and poor lubrication during the sliding process of the tie rod. It also avoids wear and oil leakage during the sliding process of the tie rod, improving the normal operation and precision of the injection molding machine.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of this utility model, a movable template pull rod oil seal structure is provided, including a movable template, a pull rod, and an oil seal mechanism. The movable template has several sliding grooves, and the pull rod slides into these grooves. The oil seal mechanism includes an oil seal ring, a copper sleeve, and a dust seal cap. The copper sleeve is fitted onto the pull rod and located inside the sliding groove. Both ends of the pull rod within the sliding groove are provided with the copper sleeve, and the copper sleeve has several through holes. The movable template has an oil injection port, which communicates with the through holes. The oil seal ring is located on one side of the copper sleeve and fitted onto the pull rod. The dust seal cap is fixedly located at both ends of the movable template to limit the movement of the oil seal ring.

[0007] As a further embodiment of this utility model: the oil seal ring is provided with a positioning groove, and the side of the positioning groove near the center of the oil seal ring is a sealing ring, which is connected to the outer peripheral wall of the pull rod.

[0008] As a further embodiment of this utility model: a spring groove is provided on the sealing ring, the spring groove is disposed on the side wall of the positioning groove, and a clamping spring is disposed in the spring groove.

[0009] As a further embodiment of this invention, the sealing ring has an inverted triangular cross-section.

[0010] As a further embodiment of this utility model: the inner ring of the oil seal ring is provided with a dustproof ring, the dustproof ring is disposed on one side of the sealing ring, the dustproof ring is inclined and close to the dust seal cover.

[0011] As a further embodiment of this utility model: a first annular groove is formed on the outer peripheral wall of the copper sleeve, and a second annular groove is formed on the inner peripheral wall of the copper sleeve.

[0012] As a further embodiment of this utility model, the pull rod and the copper sleeve are fitted with a clearance.

[0013] As a further embodiment of this utility model: the oil seal ring adopts a metal skeleton, and the metal skeleton is provided with a rubber edging.

[0014] As a further embodiment of this invention, the sealing ring and the oil seal ring are elastically connected.

[0015] As a further embodiment of this utility model: the dust sealing cover is bolted to the moving template.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model uses an oil seal ring fitted onto a tie rod, with the sealing ring on it in close contact with the outer peripheral wall of the tie rod, forming an effective sealing barrier. At the same time, the clamping spring enhances the tightness between the sealing ring and the tie rod, improving the sealing performance. Since the cross-section of the sealing ring is an inverted triangular structure, the contact pressure distribution between it and the tie rod is more reasonable, which helps to form an extremely thin oil film and achieve boundary lubrication.

[0018] 2. By tilting the dustproof ring and placing it close to the dust seal cover, this utility model effectively prevents external impurities such as dust and moisture from entering the gap between the pull rod and the copper sleeve, thus protecting the normal operation of the lubrication system and equipment.

[0019] 3. In this invention, lubricating oil is injected into the through hole of the copper sleeve through the oil inlet, and then flows into the gap between the tie rod and the copper sleeve. Because the copper sleeve has a first annular groove and a second annular groove, the lubricating oil can be stored and distributed in these annular grooves, ensuring that the tie rod is always adequately lubricated during sliding. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a moving template tie rod oil seal structure.

[0021] Figure 2 Sectional view of the tie rod installation.

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the oil seal mechanism.

[0023] Figure 4 A sectional view of the oil seal mechanism.

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of a copper tube.

[0025] The attached diagram is labeled as follows: 1. Moving template; 11. Slide groove; 12. Oil inlet; 2. Tie rod; 3. Oil seal ring; 31. Positioning groove; 4. Copper sleeve; 41. Through hole; 42. First ring groove; 43. Second ring groove; 5. Dust seal cap; 6. Sealing ring; 61. Spring groove; 62. Clamping spring; 7. Dustproof ring. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figures 1 to 5 As shown, a movable template pull rod oil seal structure includes a movable template 1, a pull rod 2, and an oil seal mechanism. The movable template 1 has several sliding grooves 11, and the pull rod 2 slides in cooperation with the sliding grooves 11. The oil seal mechanism includes an oil seal ring 3, a copper sleeve 4, and a dust seal cap 5. The copper sleeve 4 is sleeved on the pull rod 2 and located inside the sliding groove 11. The two ends of the pull rod 2 located in the sliding groove 11 are provided with the copper sleeve 4, and the copper sleeve 4 has several through holes 41. The movable template 1 is provided with an oil injection port 12, which is connected to the through holes 41. Through the oil injection port 12 on the movable template 1, lubricating oil is injected into the through holes 41 of the copper sleeve 4, and then flows into the gap between the pull rod 2 and the copper sleeve 4.

[0028] The oil seal ring 3 is disposed on one side of the copper sleeve 4 and fitted onto the pull rod 2. The dust seal cap 5 is fixedly disposed at both ends of the moving template 1 to limit the oil seal ring 3. The oil seal ring 3 has a positioning groove 31, and a sealing ring 6 is located on the side of the positioning groove 31 closest to the center of the oil seal ring 3. The sealing ring 6 is in contact with the outer peripheral wall of the pull rod 2. A spring groove 61 is formed on the sealing ring 6, located on the side wall of the positioning groove 31, and a clamping spring 62 is disposed within the spring groove 61. The oil seal ring 3 is fitted onto the pull rod 2, and the sealing ring 6 on it is in close contact with the outer peripheral wall of the pull rod 2, forming an effective sealing barrier. The clamping spring 62 further enhances the tightness between the sealing ring 6 and the pull rod 2, improving the sealing performance.

[0029] The sealing ring 6 has an inverted triangular cross-section, which makes the contact pressure distribution between it and the tie rod 2 more reasonable, and helps to form an extremely thin oil film to achieve boundary lubrication.

[0030] The inner ring of the oil seal ring 3 is provided with a dustproof ring 7. The dustproof ring 7 is located on one side of the sealing ring 6. The dustproof ring 7 is inclined and close to the dust seal cover 5, which effectively blocks external impurities such as dust and moisture from entering the gap between the pull rod 2 and the copper sleeve 4, thus protecting the normal operation of the lubrication system and equipment.

[0031] The outer peripheral wall of the copper sleeve 4 has a first annular groove 42, and the inner peripheral wall of the copper sleeve 4 has a second annular groove 43. The pull rod 2 is clearance-fitted with the copper sleeve 4.

[0032] When lubricating oil is injected into the through hole 41 of the copper sleeve 4 through the oil inlet 12, it flows into the gap between the tie rod 2 and the copper sleeve 4. Since the copper sleeve 4 has a first annular groove 42 and a second annular groove 43, the lubricating oil can be stored and distributed in these annular grooves, ensuring that the tie rod 2 is always adequately lubricated during sliding.

[0033] The oil seal ring 3 uses a metal frame with rubber edging, which ensures the strength and durability of the oil seal ring 3 and improves its sealing performance.

[0034] The sealing ring 6 is elastically connected to the oil seal ring 3, which allows the sealing ring 6 to adapt to the slight deformation and vibration generated when the pull rod 2 moves, maintain close contact with the pull rod 2, and further improve the sealing effect.

[0035] The dust seal cap 5 is bolted to the moving template 1, ensuring the accurate axial positioning of the oil seal ring 3 and preventing it from shifting or falling off during operation.

[0036] The working principle of this utility model is as follows: Lubricating oil is injected through the oil inlet 12 on the moving template 1. The lubricating oil flows into the gap between the pull rod 2 and the copper sleeve 4 through the through hole 41 on the copper sleeve 4. At the same time, the first annular groove 42 and the second annular groove 43 on the copper sleeve 4 store and distribute the lubricating oil, ensuring that the pull rod 2 is fully lubricated when sliding. The sealing ring 6 on the oil seal ring 3 is in close contact with the pull rod 2, forming an effective sealing barrier. The clamping spring 62 enhances the sealing effect, and the dustproof ring 7 prevents external impurities from entering. The dustproof cover 5 fixes the oil seal ring 3 and prevents its displacement. The overall structure ensures that the pull rod 2 is both lubricated and sealed during sliding, protecting the lubrication system and the normal operation of the equipment.

[0037] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A movable template tie rod oil seal structure, comprising a movable template (1), a tie rod (2) and an oil seal mechanism, wherein the movable template (1) is provided with a plurality of sliding grooves (11), and the tie rod (2) is slidably engaged with the sliding grooves (11); Its features are, The oil sealing mechanism includes an oil sealing ring (3), a copper sleeve (4), and a dust sealing cap (5). The copper sleeve (4) is fitted onto the pull rod (2) and located inside the slide groove (11). Both ends of the pull rod (2) located inside the slide groove (11) are provided with the copper sleeve (4). The copper sleeve (4) has several through holes (41). The moving template (1) is provided with an oil injection port (12), which is connected to the through holes (41). The oil sealing ring (3) is located on one side of the copper sleeve (4) and fitted onto the pull rod (2). The dust sealing cap (5) is fixedly located at both ends of the moving template (1) to limit the oil sealing ring (3).

2. The oil seal structure for a moving template tie rod according to claim 1, characterized in that, The oil seal ring (3) is provided with a positioning groove (31), and the side of the positioning groove (31) near the center of the oil seal ring (3) is a sealing ring (6), which is connected to the outer peripheral wall of the pull rod (2).

3. The oil seal structure for a moving template tie rod according to claim 2, characterized in that, A spring groove (61) is provided on the sealing ring (6), the spring groove (61) is provided on the side wall of the positioning groove (31), and a clamping spring (62) is provided in the spring groove (61).

4. The oil seal structure for a moving template tie rod according to claim 2, characterized in that, The sealing ring (6) has an inverted triangular cross-section.

5. The oil seal structure for a moving template tie rod according to claim 2, characterized in that, The inner ring of the oil seal ring (3) is provided with a dustproof ring (7), which is located on one side of the sealing ring (6). The dustproof ring (7) is inclined and close to the dust seal cover (5).

6. The oil seal structure for a moving template tie rod according to claim 1, characterized in that, The outer peripheral wall of the copper sleeve (4) is provided with a first annular groove (42), and the inner peripheral wall of the copper sleeve (4) is provided with a second annular groove (43).

7. The oil seal structure for a moving template tie rod according to claim 1, characterized in that, The pull rod (2) and the copper sleeve (4) are fitted with a clearance.

8. The oil seal structure for a moving template tie rod according to claim 1, characterized in that, The oil seal ring (3) is made of metal frame and has rubber edging.

9. The oil seal structure for a moving template tie rod according to claim 2, characterized in that, The sealing ring (6) is elastically connected to the oil seal ring (3).

10. The oil seal structure for a moving template tie rod according to claim 1, characterized in that, The dust sealing cover (5) is bolted to the moving template (1).

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