Sealing ring protecting and positioning device for vacuumizing mold shell

Abstract

The utility model discloses a sealing ring protecting and positioning device for a vacuumizing mold shell, which belongs to the technical field of tire vulcanization molds and comprises a base, a base outer ring is arranged on the base, and a first matching surface is arranged on the inner circular surface of the base outer ring; a second matching surface is arranged on the outer circular surface of the guide ring, and after mold closing, the first matching surface is in clearance fit with the second matching surface; a first sealing ring is arranged on the first matching surface or the second matching surface, a first positioning part is arranged on the first matching surface or the second matching surface, and the first positioning part is arranged in a protruding manner; in the mold closing process, the first positioning part enters a fit clearance between the first fit surface and the second fit surface earlier than the first sealing ring; according to the utility model, the positioning part which is arranged in a protruding manner can be used for effectively controlling the fit clearance of parts which move relatively in the vacuumizing mold shell during mold opening and closing, so that the sealing ring is ensured to effectively realize sealing, meanwhile, the condition of extrusion damage is avoided, and the service life of the sealing ring is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tire vulcanization molds, and particularly relates to a sealing ring protection and positioning device for a vacuum shell Background Art

[0002] The vacuum shell is a key component for vulcanizing tires and an important factor determining the quality, performance and cost of tires. During tire vulcanization, the opening and closing sealing of the vacuum shell needs to be completed by the cooperation of a sealing ring and corresponding components. Specifically, in order to reduce the wear between relatively moving components, there needs to be a certain gap between the relatively moving components. After mold closing, the sealing ring seals this gap. Due to the problem of the repeated positioning accuracy of the opening and closing of the vulcanizer itself, a slight eccentricity during the opening and closing of the vacuum shell may squeeze the sealing ring, resulting in air leakage and thus defective tires, which requires dismounting for replacement and delays production.

[0003] Therefore, it is an urgent problem to be solved at present to develop and design a protection and positioning device that can achieve precise positioning during the opening and closing of the vacuum shell, avoid squeezing the sealing ring, and extend the service life of the sealing ring. Summary of the Utility Model

[0004] Regarding the problems existing in the prior art, the utility model provides a sealing ring protection and positioning device for a vacuum shell, which can effectively control the cooperation gap of the relatively moving components in the vacuum shell during mold opening and closing by using the protruding positioning part. While ensuring that the sealing ring effectively realizes sealing, the situation of being squeezed will not occur, and the service life of the sealing ring is effectively extended.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] The utility model provides a sealing ring protection and positioning device for a vacuum shell, comprising:

[0007] A base, on which a base outer ring is provided, and the inner circular surface of the base outer ring has a first mating surface;

[0008] A guide ring, on the outer circular surface of which a second mating surface is provided. After mold closing, the first mating surface and the second mating surface are in clearance fit;

[0009] A first sealing ring, which is arranged on the first mating surface or the second mating surface;

[0010] A first positioning part, which is arranged on the first mating surface or the second mating surface, and the first positioning part protrudes; during the mold closing process, the first positioning part enters the mating gap between the first mating surface and the second mating surface earlier than the first sealing ring.

[0011] As a preferred technical solution, it further includes a mounting ring, an upper cover, an upper sealing disc and a sealing flange; the mounting ring is fixedly connected to the guide ring; after the mold is closed, the mounting ring is in clearance fit with the upper cover, and the upper sealing disc is in clearance fit with the sealing flange.

[0012] As a preferred technical solution, when the mold is closed, the upper sealing disc moves relative to the sealing flange; a third mating surface is provided on the outer circumferential surface of the sealing flange, and a fourth mating surface is provided on the inner circumferential surface of the upper sealing disc; after the mold is closed, the third mating surface is in clearance fit with the fourth mating surface; a second sealing ring is provided on the third mating surface or the fourth mating surface.

[0013] As a preferred technical solution, a second positioning portion is provided on the third mating surface or the fourth mating surface, and the second positioning portion protrudes; during the mold closing process, the second positioning portion enters the mating clearance between the third mating surface and the fourth mating surface earlier than the second sealing ring.

[0014] As a preferred technical solution, a second positioning portion is provided on the outer circumferential surface of the upper cover or the inner circumferential surface of the mounting ring, and the second positioning portion protrudes; during the mold closing process, the second positioning portion enters the mating clearance between the mounting ring and the upper cover earlier than the second sealing ring enters the mating clearance between the third mating surface and the fourth mating surface.

[0015] As a preferred technical solution, a second positioning portion is provided on the inner circumferential surface of the guide ring, and the second positioning portion protrudes; during the mold closing process, when the second sealing ring enters the mating clearance between the third mating surface and the fourth mating surface, at least a part of the second positioning portion is located in the mating clearance between the guide ring and the upper cover.

[0016] As a preferred technical solution, when the mold is closed, the mounting ring moves relative to the upper sealing disc; a fifth mating surface is provided on the outer circumferential surface of the upper sealing disc, and a sixth mating surface is provided on the inner circumferential surface of the mounting ring; after the mold is closed, the fifth mating surface is in clearance fit with the sixth mating surface; a third sealing ring is provided on the fifth mating surface or the sixth mating surface, and a third positioning portion is provided on the fifth mating surface or the sixth mating surface, and the third positioning portion protrudes; during the mold closing process, the third positioning portion enters the mating clearance between the fifth mating surface and the sixth mating surface earlier than the third sealing ring.

[0017] As a preferred technical solution, both the first sealing ring and the first positioning portion are provided on the second mating surface. There is a groove on the second mating surface for placing the first sealing ring, and the first positioning portion is located below the first sealing ring.

[0018] As a preferred technical solution, the first sealing ring protrudes 1 mm from the second mating surface;

[0019] and / or, the protruding height of the first positioning portion is set to 0.1 mm;

[0020] and / or, the mating clearance between the first mating surface and the second mating surface is set to 0.3 mm.

[0021] As a preferred technical solution, the first positioning portion is set as a gasket or formed by surfacing;

[0022] and / or, the material of the first positioning portion is set as wear-resistant composite material or copper;

[0023] and / or, the first positioning portion is arranged circumferentially, or the first positioning portion is provided in multiple numbers, and multiple first positioning portions are distributed circumferentially.

[0024] The beneficial effects of the present utility model are as follows:

[0025] 1. The present utility model utilizes the protruding positioning portions (the first positioning portion, the second positioning portion, and the third positioning portion) to effectively control the mating clearance of the relatively moving components in the vacuum pumping die shell during mold opening and closing. It plays a role in precise positioning before the sealing rings (the first sealing ring, the second sealing ring, and the third sealing ring) enter the mating clearance, and the positioning portion will also disengage from the mating clearance later than the sealing rings. While ensuring that the sealing rings effectively achieve sealing, the situation of being squeezed and damaged will not occur, effectively prolonging the service life of the sealing rings, reducing the maintenance, repair, and replacement costs of the sealing rings, reducing the disposal cost of scrapped sealing rings, reducing environmental pollution, reducing the number of times the vacuum pumping die shell is taken off the machine, reducing the eccentricity during mold opening and closing, and improving the quality and output of vulcanized tires.

[0026] 2. The material used to form the positioning portion of the present utility model has good sliding performance, which can effectively protect the clearance mating surface between the two relatively moving components and prolong the service life of the relatively moving components in the vacuum pumping die shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the first embodiment of a sealing ring protection and positioning device for a vacuum pumping die shell of the present utility model during mold opening;

[0028] Figure 2 is Figure 1Schematic structural diagram during the mold opening and closing process;

[0029] Figure 3 is Figure 2 The enlarged view of area A in

[0030] Figure 4 is Figure 2 The enlarged view of area B in

[0031] Figure 5 is Figure 1 Schematic structural diagram after mold clamping;

[0032] Figure 6 Schematic structural diagram during the mold opening and closing process of the second embodiment of a sealing ring protection and positioning device for a vacuum-pumping mold shell of the present utility model;

[0033] Figure 7 Schematic structural diagram during the mold opening and closing process of the third embodiment of a sealing ring protection and positioning device for a vacuum-pumping mold shell of the present utility model;

[0034] Figure 8 Schematic structural diagram during the mold opening and closing process of the fourth embodiment of a sealing ring protection and positioning device for a vacuum-pumping mold shell of the present utility model;

[0035] Figure 9 Schematic structural diagram during the mold opening and closing process of the fifth embodiment of a sealing ring protection and positioning device for a vacuum-pumping mold shell of the present utility model.

[0036] In the figure: 1 - base, 11 - outer ring of the base, 12 - first mating surface, 2 - guide ring, 21 - second mating surface, 22 - first sealing ring, 23 - first positioning portion, 3 - mounting ring, 31 - sixth mating surface, 4 - upper cover, 5 - upper sealing disk, 51 - fourth mating surface, 52 - second sealing ring, 53 - fifth mating surface, 54 - third sealing ring, 55 - third positioning portion, 6 - sealing flange, 61 - third mating surface, 7 - second positioning portion. Specific embodiments

[0037] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0038] Embodiment 1

[0039] Please refer to Figures 1-5, which is an embodiment of a sealing ring protection and positioning device for a vacuum-drawing die shell provided by the present utility model, includes a base 1 and a guide ring 2. During mold opening and closing, the guide ring 2 moves in a direction away from or towards the base 1; a base outer ring 11 is provided on the base 1, and a first mating surface 12 is provided on the inner circular surface of the base outer ring 11. A second mating surface 21 is provided on the outer circular surface of the guide ring 2, and a first sealing ring 22 is provided on the second mating surface 21. After mold closing, the first mating surface 12 and the second mating surface 21 are in clearance fit, and the first sealing ring 22 is embedded between the first mating surface 12 and the second mating surface 21 to seal the clearance; a first positioning portion 23 is provided at a position below the first sealing ring 22 on the second mating surface 21. During mold closing, the protruding first positioning portion 23 enters the mating clearance between the first mating surface 12 and the second mating surface 21 earlier than the first sealing ring 22, which can effectively control the mating clearance between the first mating surface 12 and the second mating surface 21. At the same time, during mold opening, the protruding first positioning portion 23 disengages from the mating clearance between the first mating surface 12 and the second mating surface 21 later than the first sealing ring 22, which can effectively prevent the mating clearance between the first mating surface 12 and the second mating surface 21 from being too small and squeezing the first sealing ring 22, thus prolonging the service life of the first sealing ring 22.

[0040] In other embodiments, the first sealing ring 22 or the first positioning portion 23 can also be provided on the first mating surface 12, with the condition that the first positioning portion 23 enters the mating clearance between the first mating surface 12 and the second mating surface 21 earlier than the first sealing ring 22; it should be noted that the positioning portion and the sealing ring are preferably provided on the same mating surface. Since the hardness of the positioning portion is relatively soft, if the positioning portion and the sealing ring are respectively provided on different mating surfaces, the friction force becomes larger after the positioning portion is worn, and it is also easy to break the sealing ring; further, the sealing ring is preferably provided on the relatively moving sealing surface.

[0041] Specifically, please refer to Figures 1-5 , a groove for placing the first sealing ring 22 should be provided on the second mating surface 21, and a part of the first sealing ring 22 is embedded in the groove to facilitate positioning of the first sealing ring 22; further, the first sealing ring 22 preferably protrudes from the second mating surface 21 by about 1 mm. Correspondingly, the mating clearance between the first mating surface 12 and the second mating surface 21 is preferably set to 0.3 mm, and the protruding height of the first positioning portion 23 is preferably set to 0.1 mm. In actual use, the first positioning portion 23 can control the mating clearance between the first mating surface 12 and the second mating surface 21 within the range of 0.1 - 0.5 mm, effectively preventing the sealing ring from being squeezed.

[0042] In this embodiment, please refer to Figures 1-5, the first positioning portion 23 is provided as a gasket. The gasket is fixed on the second mating surface 21 by screws. The gasket is preferably made of a composite wear-resistant plate or copper material. While effectively controlling the mating clearance, the surface of the first positioning portion 23 has good sliding performance and can protect the first mating surface 12 that may rub against it.

[0043] It should be noted that the first positioning portion 23 is preferably arranged circumferentially to ensure the consistency of the mating clearance between the first mating surface 12 and the second mating surface 21 in the circumferential direction; in other embodiments, the first positioning portion 23 can also be provided as multiple, and the multiple first positioning portions 23 are evenly distributed circumferentially, which can also keep the mating clearance between the first mating surface 12 and the second mating surface 21 consistent in the circumferential direction.

[0044] In this embodiment, please refer to Figures 1-5 , the present utility model further includes a mounting ring 3, an upper cover 4, an upper sealing disc 5 and a sealing flange 6; the base 1 is provided with pattern blocks, the outer wall of the pattern blocks is connected to the guide ring 2, the top of the guide ring 2 is fixedly connected to the mounting ring 3, and the mounting ring 3 is fixedly connected to the upper sealing disc 5; after the mold is closed, the mounting ring 3 has a clearance fit with the upper cover 4, and the upper sealing disc 5 has a clearance fit with the sealing flange 6; during the process of closing the mold, the upper sealing disc 5 moves relative to the sealing flange 6; the outer circumferential surface of the sealing flange 6 has a third mating surface 61, and the inner circumferential surface of the upper sealing disc 5 has a fourth mating surface 51; after the mold is closed, the third mating surface 61 has a clearance fit with the fourth mating surface 51; a second sealing ring 52 is provided on the fourth mating surface 51, and after the mold is closed, the third mating surface 61 has a clearance fit with the fourth mating surface 51, and the second sealing ring 52 is embedded between the third mating surface 61 and the fourth mating surface 51 to seal the clearance; a second positioning portion 7 is provided at a position below the second sealing ring 52 on the fourth mating surface 51. During the process of closing the mold, the protruding second positioning portion 7 enters the mating clearance between the third mating surface 61 and the fourth mating surface 51 earlier than the second sealing ring 52, which can effectively control the mating clearance between the third mating surface 61 and the fourth mating surface 51. At the same time, during the process of opening the mold, the protruding second positioning portion 7 disengages from the mating clearance between the third mating surface 61 and the fourth mating surface 51 later than the second sealing ring 52, which can effectively prevent the mating clearance between the third mating surface 61 and the fourth mating surface 51 from being too small and squeezing the second sealing ring 52, and prolong the service life of the second sealing ring 52; in other embodiments, the second sealing ring 52 or the second positioning portion 7 can also be provided on the third mating surface 61, based on the second positioning portion 7 entering the mating clearance between the third mating surface 61 and the fourth mating surface 51 earlier than the second sealing ring 52.

[0045] It should be noted that the height of the second sealing ring 52 is preferably set to 1 mm, and accordingly, the fitting clearance between the third mating surface 61 and the fourth mating surface 51 is preferably set to 0.3 mm, and the preferred protruding height of the second positioning portion 7 is preferably set to 0.1 mm. The second positioning portion 7 can be formed by surfacing welding or set as a gasket.

[0046] Embodiment 2

[0047] Please refer to Figure 6 The difference between this embodiment and the first embodiment is that the second positioning portion 7 is arranged on the outer circumferential surface of the upper cover 4. During the mold closing process, the time when the second positioning portion 7 enters the matching gap between the mounting ring 3 and the upper cover 4 is earlier than the time when the second sealing ring 52 enters the matching gap between the third matching surface 61 and the fourth matching surface 51. At the same time, during the mold opening process, the time when the second positioning portion 7 leaves the matching gap between the mounting ring 3 and the upper cover 4 is later than the time when the second sealing ring 52 leaves the matching gap between the third matching surface 61 and the fourth matching surface 51. By indirect positioning, the third matching surface 61 can also be accurately controlled.

[0048] The matching clearance between the matching surface 61 and the fourth matching surface 51 can avoid squeezing and damaging the second sealing ring 52 .

[0049] The first positioning portion 23 can also be formed by additive manufacturing and surfacing welding on the second mating surface 21; the material of the first positioning portion 23 is preferably set to be a wear-resistant composite material or copper, which can also make the surface sliding performance of the first positioning portion 23 better and effectively protect the first mating surface 12 that may rub against it.

[0050] Embodiment 3

[0051] Please refer to Figure 7 The difference between this embodiment and the first embodiment mainly lies in that the second positioning portion 7 is arranged at the inner circular surface of the mounting ring 3. During the mold closing process, the time when the second positioning portion 7 enters the fitting gap between the mounting ring 3 and the upper cover 4 is earlier than the time when the second sealing ring 52 enters the fitting gap between the third fitting surface 61 and the fourth fitting surface 51. At the same time, during the mold opening process, the time when the second positioning portion 7 leaves the fitting gap between the mounting ring 3 and the upper cover 4 is later than the time when the second sealing ring 52 leaves the fitting gap between the third fitting surface 61 and the fourth fitting surface 51. By indirect positioning, the fitting gap between the third fitting surface 61 and the fourth fitting surface 51 can also be accurately controlled to avoid squeezing the second sealing ring 52.

[0052] Embodiment 4

[0053] Please refer to Figure 8, the main difference between this embodiment and the first embodiment is that: the second positioning portion 7 is provided on the inner circular surface of the guide ring 2. During the mold closing process, when the second sealing ring 52 enters the fitting gap between the third fitting surface 61 and the fourth fitting surface 51, at least a part of the second positioning portion 7 is located in the fitting gap between the guide ring 2 and the upper cover 4. By means of indirect positioning, the fitting gap between the third fitting surface 61 and the fourth fitting surface 51 can also be accurately controlled to avoid squeezing the second sealing ring 52.

[0054] Embodiment Five

[0055] Please refer to Figure 9 , the main difference between this embodiment and the first embodiment is that: the upper sealing disc 5 is fixedly connected to the sealing flange 6. During mold closing, the mounting ring 3 moves relative to the upper sealing disc 5; a fifth fitting surface 53 is provided on the outer circular surface of the upper sealing disc 5, and a sixth fitting surface 31 is provided on the inner circular surface of the mounting ring 3; after mold closing, the fifth fitting surface 53 and the sixth fitting surface 31 are in clearance fit; a third sealing ring 54 is provided on the fifth fitting surface 53, and a third positioning portion 55 protruding is provided at a position above the third sealing ring 54 on the fifth fitting surface 53; during the mold closing process, the third positioning portion 55 enters the fitting gap between the fifth fitting surface 53 and the sixth fitting surface 31 earlier than the third sealing ring 54. At the same time, during the mold opening process, the third positioning portion 55 disengages from the fitting gap between the fifth fitting surface 53 and the sixth fitting surface 31 later than the third sealing ring 54, which can effectively prevent the fitting gap between the fifth fitting surface 53 and the sixth fitting surface 31 from being too small and squeezing the third sealing ring 54, and extend the service life of the third sealing ring 54; in other embodiments, the third sealing ring 54 or the third positioning portion 55 can also be provided on the sixth fitting surface 31, based on the third positioning portion 55 entering the fitting gap between the fifth fitting surface 53 and the sixth fitting surface 31 earlier than the third sealing ring 54.

[0056] It should be noted that the height of the third sealing ring 54 is preferably set to 1 mm. Correspondingly, the fitting gap between the fifth fitting surface 53 and the sixth fitting surface 31 is preferably set to 0.3 mm, and the protruding height of the third positioning portion 55 is preferably set to 0.1 mm. The third positioning portion 55 can be formed by surfacing or be a gasket.

[0057] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing ring protection and positioning device for a vacuum-drawn die shell, characterized in that, Comprising: A base (1), on which a base outer ring (11) is provided, and a first mating surface (12) is provided on the inner circular surface of the base outer ring (11); A guide ring (2), on which a second mating surface (21) is provided. After mold closing, the first mating surface (12) and the second mating surface (21) are in clearance fit; A first sealing ring (22), which is provided on the first mating surface (12) or the second mating surface (21); A first positioning portion (23), which is provided on the first mating surface (12) or the second mating surface (21), and the first positioning portion (23) protrudes. During mold closing, the first positioning portion (23) enters the mating clearance between the first mating surface (12) and the second mating surface (21) earlier than the first sealing ring (22); 2. The positioning device for protecting the sealing ring used in the evacuated formwork according to claim 1, characterized in that, It further comprises a mounting ring (3), an upper cover (4), an upper sealing disc (5) and a sealing flange (6); the mounting ring (3) is fixedly connected to the guide ring (2); after mold closing, the mounting ring (3) and the upper cover (4) are in clearance fit, and the upper sealing disc (5) and the sealing flange (6) are in clearance fit; 3. A sealing ring protection and positioning device for a vacuum pumping formwork according to claim 2, characterized in that During mold closing, the upper sealing disc (5) moves relative to the sealing flange (6); a third mating surface (61) is provided on the outer circular surface of the sealing flange (6), and a fourth mating surface (51) is provided on the inner circular surface of the upper sealing disc (5); after mold closing, the third mating surface (61) and the fourth mating surface (51) are in clearance fit; a second sealing ring (52) is provided on the third mating surface (61) or the fourth mating surface (51); 4. A sealing ring protection and positioning device for a vacuum pumping formwork according to claim 3, characterized in that, A second positioning portion (7) is provided on the third mating surface (61) or the fourth mating surface (51), and the second positioning portion (7) protrudes. During mold closing, the second positioning portion (7) enters the mating clearance between the third mating surface (61) and the fourth mating surface (51) earlier than the second sealing ring (52); 5. The sealing ring protection and positioning device for a vacuum pumping formwork according to claim 3, characterized in that, The second positioning portion (7) is provided on the outer circular surface of the upper cover (4) or the inner circular surface of the mounting ring (3), and the second positioning portion (7) protrudes. During mold closing, the second positioning portion (7) enters the mating clearance between the mounting ring (3) and the upper cover (4) earlier than the second sealing ring (52) enters the mating clearance between the third mating surface (61) and the fourth mating surface (51); 6. The sealing ring protection and positioning device for evacuating formwork according to claim 3, characterized in that, The second positioning portion (7) is provided on the inner circular surface of the guide ring (2), and the second positioning portion (7) protrudes. When the second sealing ring (52) enters the mating clearance between the third mating surface (61) and the fourth mating surface (51) during mold closing, at least part of the second positioning portion (7) is located in the mating clearance between the guide ring (2) and the upper cover (4); 7. A sealing ring protection and positioning device for a vacuum pumping formwork according to claim 2, characterized in that, During mold clamping, the mounting ring (3) moves relative to the upper sealing disc (5); a fifth mating surface (53) is provided on the outer circumferential surface of the upper sealing disc (5), and a sixth mating surface (31) is provided on the inner circumferential surface of the mounting ring (3); after mold clamping, the fifth mating surface (53) and the sixth mating surface (31) are in clearance fit; a third sealing ring (54) is provided on the fifth mating surface (53) or the sixth mating surface (31), and a third positioning portion (55) is provided on the fifth mating surface (53) or the sixth mating surface, and the third positioning portion (55) protrudes; during mold clamping, the third positioning portion (55) enters the mating clearance between the fifth mating surface (53) and the sixth mating surface (31) earlier than the third sealing ring (54).

8. A sealing ring protection and positioning device for a vacuum pumping formwork, characterized in that, Both the first sealing ring (22) and the first positioning portion (23) are provided on the second mating surface (21), the second mating surface (21) has a groove for placing the first sealing ring (22), and the first positioning portion (23) is located below the first sealing ring (22).

9. A sealing ring protection and positioning device for a vacuum pumping formwork, according to claim 1 or 8, characterized in that The first sealing ring (22) protrudes 1 mm from the second mating surface (21); and / or, the protruding height of the first positioning portion (23) is set to 0.1 mm; and / or, the mating clearance between the first mating surface (12) and the second mating surface (21) is set to 0.3 mm.

10. A sealing ring protection and positioning device for a vacuum pumping formwork, characterized in that, according to claim 1 or 8, The first positioning portion (23) is provided as a gasket or formed by surfacing; and / or, the material of the first positioning portion (23) is set as wear-resistant composite material or copper; and / or, the first positioning portion (23) is arranged circumferentially, or the first positioning portion (23) is provided in plurality, and a plurality of the first positioning portions (23) are distributed circumferentially.

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