Air hole sleeve

Abstract

The utility model discloses an air hole sleeve, which belongs to the technical field of tire vulcanization equipment, and comprises a mandrel, one end of the mandrel is provided with a shaft head, and the other end of the mandrel is provided with a limiting part; the sleeve body is arranged on the core shaft in a sleeving mode, and an air channel is formed by the sleeve body and the core shaft; one end, close to the shaft head, of the sleeve body is an air inlet end, and one end, close to the limiting part, of the sleeve body is an air outlet end; a plurality of through exhaust holes are formed in the end face of the air inlet end; the elastic piece enables the shaft head to have a trend of being far away from the air channel; the through exhaust holes formed in the end face of the air inlet end of the sleeve body can exhaust gas remaining in a tire mold cavity together with the air channel, even if the air channel is blocked when the elastic piece is automatically opened and closed, the exhaust holes can also serve as a main exhaust means, and the safety of the tire mold is improved. And it is guaranteed that gas remaining in the tire mold cavity can be completely exhausted, the exhaust effect is guaranteed, and the tire vulcanization effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tire vulcanization equipment, in particular to an air hole sleeve. Background Art

[0002] The vent sleeve is an exhaust device developed on the basis of the ordinary exhaust sleeve. It is a key component for exhausting the tire mold without tire hair. During the closing process of the tire mold, the cavity gradually closes, and some gas cannot be discharged in time and will remain in the cavity. During vulcanization, the gas remaining in the cavity will hinder the fit between the tire blank and the mold and affect the vulcanization effect. Therefore, it is necessary to set an vent sleeve on the tire mold to discharge this part of the residual gas.

[0003] The existing pore sleeve mainly relies on elastic parts to open and close the airway. When the rubber enters the airway due to various reasons, the rebound effect of the elastic part is weakened, and the core shaft in the pore sleeve may not rebound properly or even not rebound at all, making it impossible to realize the automatic opening and closing of the airway, thereby affecting the exhaust effect.

[0004] Therefore, developing and designing a vent sleeve that can enhance the exhaust effect and ensure the exhaust effect even when the elastic member is blocked from opening and closing the airway is a problem that needs to be solved urgently at this stage. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides an air hole sleeve, which utilizes a plurality of through exhaust holes arranged on the end face of the air inlet end of the sleeve body to discharge the gas remaining in the tire mold cavity together with the air duct. Even when the opening and closing of the air duct of the elastic member is blocked, the exhaust holes can also serve as the main exhaust means to ensure that the gas remaining in the tire mold cavity can be completely discharged, thereby ensuring the exhaust effect and the vulcanization effect of the tire.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] The utility model provides a vent sleeve, comprising:

[0008] A mandrel, one end of which has a shaft head, and the other end of which has a limiting portion;

[0009] A sleeve body, the sleeve body is sleeved on the core shaft, the sleeve body and the core shaft form an air passage; one end of the sleeve body close to the shaft head is set as an air inlet end, and one end of the sleeve body close to the limiting portion is set as an air outlet end; a plurality of through exhaust holes are provided on the end surface of the air inlet end;

[0010] An elastic member, wherein the elastic member causes the shaft head to have a tendency to move away from the air passage.

[0011] As a preferred technical solution, the core shaft can move between a first position and a second position; in the first position, there is a gap between the shaft head and the sleeve body, and the limiting portion abuts against the sleeve body; in the second position, the shaft head abuts against the sleeve body to block the airway.

[0012] As a preferred technical solution, the shaft head has a first conical surface, and the inner wall of the sleeve body close to the air inlet end has a second conical surface matching the first conical surface; when the core shaft is located at the second position, the first conical surface fits with the second conical surface;

[0013] And / or, the limiting portion has a first limiting surface, and the inner wall of the sleeve body close to the air outlet end has a second limiting surface matching the first limiting surface; when the core shaft is located at the first position, the first limiting surface abuts against the second limiting surface;

[0014] And / or, a disassembly groove is provided on the limiting portion.

[0015] As a preferred technical solution, the core shaft has a fitting section, the fitting section is gap-fitted with the airway, and a plurality of exhaust grooves are provided on the fitting section.

[0016] As a preferred technical solution, the inner wall of the sleeve body has a first abutting surface, and the core shaft has a second abutting surface; the elastic member is located in the airway, one end of the elastic member abuts against the first abutting surface, and the other end of the elastic member abuts against the second abutting surface, and the elastic member is in a compressed state;

[0017] And / or, the elastic member is configured as a spring, and the spring is sleeved on the core shaft.

[0018] As a preferred technical solution, the sleeve body includes a first section and a second section along the direction from the air inlet end to the air outlet end, and the outer diameter of the first section is greater than the outer diameter of the second section.

[0019] As a preferred technical solution, the length of the first section is set to 1 / 3-2 / 3 of the length of the sleeve;

[0020] And / or, knurling is provided on the outer peripheral surface of the first section.

[0021] As a preferred technical solution, the exhaust hole runs through the first section;

[0022] Alternatively, the exhaust hole connects the air inlet end with the air outlet end;

[0023] Alternatively, the exhaust hole connects the air inlet end with the air passage.

[0024] As a preferred technical solution, the diameter of the exhaust hole is set to 0.01-0.20 mm;

[0025] And / or, a plurality of the exhaust holes are distributed around the air passage.

[0026] As a preferred technical solution, a sealing film for sealing the exhaust hole is attached to the end surface of the air inlet end.

[0027] The beneficial effects of the utility model are as follows:

[0028] 1. The utility model utilizes a plurality of through exhaust holes arranged on the air inlet end face of the sleeve body, which can discharge the gas remaining in the tire mold cavity together with the air channel. Even when the opening and closing air channel of the elastic member is blocked, the exhaust holes can serve as the main exhaust means to ensure that the gas remaining in the tire mold cavity can be discharged smoothly, thereby ensuring the exhaust effect and the vulcanization effect of the tire.

[0029] 2. The utility model can seal the exhaust hole by using the sealing film attached to the end face of the air inlet end. When the airway blocking elastic member fails, the sealing film is torn off so that the exhaust hole can be used as an emergency exhaust channel to ensure that the tire vulcanization production continues.

[0030] 3. The first conical surface of the shaft head of the utility model matches the second conical surface on the airway. On the one hand, when the first conical surface and the second conical surface are tightly fitted, the airway can be stably blocked; on the other hand, the first conical surface and the second conical surface have a self-centering effect when fitted, which effectively ensures the coaxiality of the core shaft and the sleeve, greatly reduces the probability of rubber edges appearing at the airway opening at the air inlet end, and improves the surface quality of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a pore sleeve of the utility model;

[0032] Figure 2 for Figure 1 A magnified image of area A;

[0033] Figure 3 for Figure 1 Enlarged view of area B;

[0034] Figure 4 for Figure 1 Schematic diagram of the structure of the mandrel.

[0035] In the figure: 1-core shaft, 11-shaft head, 12-limiting part, 13-first conical surface, 14-first limiting surface, 15-matching section, 16-disassembly groove, 17-exhaust groove, 18-second abutment surface, 2-sleeve body, 21-inlet end, 22-outlet end, 23-exhaust hole, 24-second limiting surface, 25-first abutment surface, 26-first section, 27-second section, 28-knurling, 3-airway, 31-spacer, 32-second conical surface, 4-elastic member, 5-sealing membrane. DETAILED DESCRIPTION

[0036] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0037] Please refer to Figure 1-Figure 4 , is an embodiment of an air hole sleeve provided by the utility model, comprising a core shaft 1, a sleeve body 2 and an elastic member 4; the sleeve body 2 is sleeved on the core shaft 1, and the sleeve body 2 and the core shaft 1 form an air channel 3; one end of the core shaft 1 has a shaft head 11, and the end of the sleeve body 2 close to the shaft head 11 is set as an air inlet end 21. When the utility model is installed on a tire mold, the air inlet end 21 faces the cavity of the tire mold, and the residual gas in the cavity can enter the air channel 3 from the air inlet end 21; the other end of the core shaft 1 has a limiting portion 12, and the end of the sleeve body 2 close to the limiting portion 12 is set as an air outlet end 22, and the gas in the air channel 3 can be discharged from the air outlet end 22 ; A plurality of exhaust holes 23 are provided on the end face of the air inlet end 21, and the residual gas in the cavity can also be discharged through the exhaust holes 23; the elastic member 4 makes the shaft head 11 tend to move away from the air passage 3. When the tire blank in the cavity is not in contact with the shaft head 11, there is a gap 31 between the shaft head 11 and the sleeve 2, and the residual gas in the cavity can be discharged along the air passage 3; as the residual gas in the cavity is discharged, the tire blank in the cavity is in contact with the shaft head 11 and squeezes the shaft head 11, so that the shaft head 11 is against the air passage 3. While the air passage 3 is blocked, the end face of the shaft head 11 is flush with the end face of the air inlet end 21, thereby ensuring the vulcanization quality of the tire surface.

[0038] It should be noted that in order to achieve the effect of exhaust without rubber leakage and avoid the appearance of rubber hair on the tire, the aperture of the exhaust hole 23 is preferably set to 0.01-0.20mm, and more preferably set to 0.02-0.08mm; at the same time, a plurality of exhaust holes 23 are preferably evenly distributed around the air duct 3, which can improve the exhaust effect.

[0039] In this embodiment, please refer to Figure 1-Figure 3, the core shaft 1 can move between a first position and a second position; in the first position, there is a gap 31 between the shaft head 11 and the sleeve body 2, and the limiting portion 12 abuts against the sleeve body 2. The limiting portion 12 can limit the position of the shaft head 11 to prevent the shaft head 11 from moving further away from the airway 3 and prevent the core shaft 1 from escaping from the sleeve body 2. At this time, the gas at the air inlet end 21 can be discharged along the airway 3; in the second position, the shaft head 11 abuts against the sleeve body 2 to block the airway 3; at this time, the end face of the shaft head 11 should be flush with the end face of the air inlet end 21 to ensure that the surface of the vulcanized tire is smooth and no rubber edge will appear; it should be noted that, Figure 1 It is a schematic diagram of the core shaft 1 when it is in the first position.

[0040] For details, please refer to Figure 1 and Figure 2 The shaft head 11 has a first conical surface 13, and the inner wall of the sleeve 2 near the air inlet end 21 has a second conical surface 32 matching the first conical surface 13; when the core shaft 1 is located at the second position, the first conical surface 13 and the second conical surface 32 fit tightly together, which can stably block the airway 3; at the same time, the first conical surface 13 and the second conical surface 32 have a self-centering effect when fitting together, which effectively ensures the coaxiality between the core shaft 1 and the sleeve 2, greatly reduces the probability of rubber edges appearing at the airway 3 opening at the air inlet end 21, and improves the surface quality of the tire.

[0041] For further information, please refer to Figure 1 and Figure 3 The limiting portion 12 has a first limiting surface 14, and the inner wall of the sleeve 2 near the air outlet end 22 has a second limiting surface 24 matching the first limiting surface 14; when the core shaft 1 is located in the first position, the first limiting surface 14 abuts against the second limiting surface 24, which can locate the position of the core shaft 1; specifically, the first limiting surface 14 and the second limiting surface 24 are preferably set to conical surfaces, which can ensure the limiting of the core shaft 1 while also having a self-centering effect.

[0042] For further information, please refer to Figure 1 and Figure 3 The limiting portion 12 is provided with a disassembly groove 16 ; when the mandrel 1 is disassembled, the disassembly groove 16 makes it easy for the limiting portion 12 to deform, making it easy to escape from the sleeve body 2 .

[0043] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The core shaft 1 has a matching section 15, which has a clearance fit with the airway 3. The clearance between the matching section 15 and the sleeve body 2 is preferably less than 0.06 mm, which can further ensure the centering effect of the core shaft 1 and prevent the core shaft 1 from deviating. The matching section 15 is provided with a plurality of exhaust grooves 17, and the exhaust grooves 17 are preferably distributed along the circumference in 4-6 lines to facilitate exhaust.

[0044] In this embodiment, please refer to Figure 1-Figure 4 , a first abutting surface 25 is provided on the inner wall of the sleeve body 2, and a second abutting surface 18 is provided on the core shaft 1; the elastic member 4 is located in the airway 3, one end of the elastic member 4 abuts against the first abutting surface 25, and the other end of the elastic member 4 abuts against the second abutting surface 18, and the elastic member 4 is in a compressed state. The elastic member 4 can stably apply an elastic force to the core shaft 1, so that the shaft head 11 has a tendency to move away from the airway 3; specifically, the elastic member 4 is configured as a spring, and the spring is sleeved on the core shaft 1; in other embodiments, the elastic member 4 can also be configured as a spring sheet, so as to be able to apply a stable elastic force to the core shaft 1.

[0045] In this embodiment, please refer to Figure 1-Figure 3 The sleeve 2 includes a first section 26 and a second section 27 along the direction from the air inlet end 21 to the air outlet end 22. The outer diameter of the first section 26 is greater than the outer diameter of the second section 27. The first section 26 with a larger outer diameter can improve the structural strength of the sleeve 2. When the sleeve 2 is embedded in the tire mold, the sleeve 2 will not be deformed or even broken; the exhaust hole 23 runs through the first section 26, and the processing length of the exhaust hole 23 is short, which is convenient for processing and can effectively discharge the residual gas in the cavity; specifically, the length of the first section 26 is preferably set to 1 / 3-2 / 3 of the length of the sleeve 2, which is convenient for production and processing; in other embodiments, the exhaust hole 23 can also run through the first section 26 and the second section 27 at the same time or connect the end face of the air inlet end 21 with the inside of the air duct 3, so as to smoothly discharge the residual gas in the tire mold cavity.

[0046] Based on the above examples, please refer to Figure 1 and Figure 2 The outer peripheral surface of the first section 26 is provided with a knurling 28, which can ensure the matching strength between the sleeve 2 and the tire mold. When the processing accuracy of the tire mold deviates, the knurling 28 can effectively compensate for it; specifically, the depth of the knurling 28 is preferably set to 0.03-0.05mm.

[0047] In this embodiment, please refer to Figure 1 and Figure 2 A blocking film 5 for blocking the exhaust hole 23 is attached to the end surface of the air inlet end 21. When the airway 3 blocks the elastic member 4 and fails, the blocking film 5 is torn off to make the exhaust hole 23 an emergency exhaust channel to ensure continued production. This method is particularly suitable for the easily blocked area in the tire mold cavity. Specifically, the blocking film 5 is preferably set to an aluminum foil with a thickness of 0.03-0.1 mm. In other embodiments, the blocking film 5 may only block part of the exhaust hole 23 or the blocking film 5 may not be set on the end surface of the air inlet end 21, and the exhaust hole 23 and the airway 3 can simultaneously discharge the residual gas in the tire mold cavity.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pore sleeve, characterized in that: include: A mandrel (1), wherein one end of the mandrel (1) has a shaft head (11), and the other end of the mandrel (1) has a limiting portion (12); A sleeve body (2), the sleeve body (2) being sleeved on the core shaft (1), the sleeve body (2) and the core shaft (1) forming an air passage (3); an end of the sleeve body (2) close to the shaft head (11) is set as an air inlet end (21), and an end of the sleeve body (2) close to the limiting portion (12) is set as an air outlet end (22); a plurality of through-going air exhaust holes (23) are set on the end surface of the air inlet end (21); An elastic member (4), wherein the elastic member (4) causes the shaft head (11) to have a tendency to move away from the air passage (3).

2. The vent sleeve according to claim 1, characterized in that: The core shaft (1) is capable of moving between a first position and a second position; when in the first position, a gap (31) is provided between the shaft head (11) and the sleeve body (2), and the limiting portion (12) abuts against the sleeve body (2); when in the second position, the shaft head (11) abuts against the sleeve body (2), thereby blocking the airway (3).

3. The vent sleeve according to claim 2, characterized in that: The shaft head (11) has a first conical surface (13), and the inner wall of the sleeve (2) close to the air inlet end (21) has a second conical surface (32) matching the first conical surface (13); when the core shaft (1) is located at the second position, the first conical surface (13) fits the second conical surface (32); And / or, the limiting portion (12) has a first limiting surface (14), and the inner wall of the sleeve (2) close to the air outlet end (22) has a second limiting surface (24) matching the first limiting surface (14); when the core shaft (1) is located at the first position, the first limiting surface (14) abuts against the second limiting surface (24); And / or, a disassembly groove (16) is provided on the limiting portion (12).

4. A vent sleeve according to claim 1 or 2, characterized in that: The core shaft (1) has a matching section (15), the matching section (15) is clearance-matched with the air passage (3), and a plurality of exhaust grooves (17) are provided on the matching section (15).

5. The vent sleeve according to claim 1 or 2, characterized in that: The inner wall of the sleeve body (2) is provided with a first abutting surface (25), and the core shaft (1) is provided with a second abutting surface (18); the elastic member (4) is located in the air passage (3), one end of the elastic member (4) abuts against the first abutting surface (25), and the other end of the elastic member (4) abuts against the second abutting surface (18), and the elastic member (4) is in a compressed state; And / or, the elastic member (4) is configured as a spring, and the spring is sleeved on the core shaft (1).

6. The pore sleeve according to claim 1, characterized in that: The sleeve body (2) comprises a first section (26) and a second section (27) along the direction from the air inlet end (21) to the air outlet end (22), and the outer diameter of the first section (26) is greater than the outer diameter of the second section (27).

7. The pore sleeve according to claim 6, characterized in that: The length of the first section (26) is set to 1 / 3-2 / 3 of the length of the sleeve (2); And / or, the outer peripheral surface of the first section (26) is provided with knurling (28).

8. The vent sleeve according to claim 6, characterized in that: The exhaust hole (23) passes through the first section (26); Alternatively, the exhaust hole (23) connects the air inlet end (21) with the air outlet end (22); Alternatively, the exhaust hole (23) connects the air inlet end (21) with the air passage (3).

9. The vent sleeve according to claim 1 or 8, characterized in that: The diameter of the exhaust hole (23) is set to 0.01-0.20 mm; And / or, a plurality of the exhaust holes (23) are distributed around the air passage (3).

10. The vent sleeve according to claim 1 or 8, characterized in that: A blocking film (5) for blocking the exhaust hole (23) is attached to the end surface of the air inlet end (21).

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