Spring air hole sleeve

Abstract

The utility model discloses a spring air hole sleeve, which belongs to the technical field of die exhaust and comprises a sleeve shell with a through hole, a sleeve core is arranged in the through hole, a sleeve shell taper hole is arranged at one end of the through hole, and a frustum matched with the sleeve shell taper hole is arranged at one end of the sleeve core. An elastic piece is further arranged in the through hole, the elastic piece enables the frustum at the end of the sleeve core to tend to be away from the sleeve shell taper hole, an exhaust gap is formed between the frustum at the end of the sleeve core and the sleeve shell taper hole, and the end face of the frustum is always lower than the end face of the sleeve shell at the sleeve shell taper hole. The sleeve shell taper hole is provided with a limiting step, and when the end face of the frustum compresses the elastic piece under the action of external force, the side wall of the frustum can abut against the limiting step. By means of the structure, the sleeve core is lower than the end face of the sleeve shell in the natural state, the sleeve core is prevented from protruding out of the sleeve shell to affect flowing of sizing materials, and the situation that the sizing materials are left on the taper hole of the sleeve shell to affect sealing performance can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould exhaust technology field, concretely relates to a spring air hole sleeve. BACKGROUND

[0002] With the continuous development of automobile market, as an important component of automobile, tire is one of the key points of the whole industry, from the past capsule tire, to the present full steel bridge tire and half steel bridge tire, continuously upgrading and updating tire technology not only brings good driving experience for enterprise industry, but also promotes the rapid development of automobile industry.

[0003] The existing spring air hole sleeve on the market can greatly solve the rubber hair problem of tire in the vulcanization process, but with the development of the times, there are higher technical requirements for tires, the existing spring air hole sleeve is prone to poor exhaust, resulting in vulcanization overflow, vulcanization air pocket problems, ultimately reflected in the vulcanized tire finished product will appear bubble, tire filling type is not full, under sulfur and other problems.

[0004] In view of the above problems, the utility model designs and manufactures a spring air hole sleeve to overcome the above defects. SUMMARY

[0005] For the problems existing in the prior art, the spring air hole sleeve provided by the utility model makes the sleeve core lower than the end face of the sleeve shell in the natural state, avoids the influence of the sleeve core protruding from the sleeve shell on the flow of rubber, and can also effectively avoid the influence of rubber residue on the sealing performance of the sleeve shell taper hole.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme: a spring air hole sleeve, comprising a sleeve shell with a through hole, a sleeve core is arranged in the through hole, a sleeve shell taper hole is arranged at one end of the through hole, and a taper is arranged at one end of the sleeve core and matched with the sleeve shell taper hole;

[0007] An elastic member is further arranged in the through hole, the taper at the end of the sleeve core has a tendency to move away from the sleeve shell taper hole, so that the taper at the end of the sleeve core and the sleeve shell taper hole form an exhaust gap, and the end face of the taper is always lower than the end face of the sleeve shell at the sleeve shell taper hole;

[0008] The sleeve shell taper hole is provided with a limiting step, and when the end face of the taper is compressed by an external force, the side wall of the taper can abut against the limiting step.

[0009] Preferably, when the end face of the taper is not stressed, the distance between the end face of the taper and the end face of the sleeve shell at the sleeve shell taper hole is 0-0.15mm.

[0010] Preferably, the diameter of the small diameter end of the sleeve shell taper hole is greater than the diameter of the through hole, and the limiting step is formed between the small diameter end of the sleeve shell taper hole and the through hole.

[0011] Preferably, the taper ratio of the taper of the sleeve core is 5-25° larger than the taper ratio of the taper hole of the sleeve shell.

[0012] Preferably, the taper ratio of the taper is 30-60°.

[0013] Preferably, the taper ratio of the taper is 48°.

[0014] Preferably, the through hole is provided with a limiting hole, the other end of the sleeve core penetrates the limiting hole and is provided with a limiting part.

[0015] When the taper of the end of the sleeve core and the taper hole of the sleeve shell form an exhaust gap, the limiting part abuts against the end of the limiting hole.

[0016] Preferably, the surface of the limiting part abutting against the end of the limiting hole is an arc surface.

[0017] Preferably, the limiting part is provided with an exhaust groove, or the limiting part is provided with a cross-shaped boss structure.

[0018] Preferably, the diameter of the limiting hole is smaller than the diameter of the through hole, and a transition step is formed between the limiting hole and the through hole.

[0019] One end of the elastic member abuts against the root of the taper, and the other end of the elastic member abuts against the transition step.

[0020] Preferably, the elastic member is a conical spring, and the small-diameter section of the conical spring is close to the taper.

[0021] The utility model has the advantages of:

[0022] 1. The taper end face of the sleeve core is always located in the taper hole of the sleeve shell and the through hole, which can prevent the sleeve core from protruding from the sleeve shell to affect the flow of rubber material, and avoid biasing force on the sleeve core to affect the opening and closing of the spring air hole sleeve.

[0023] 2. By arranging the limiting step, the large stroke of the sleeve core is ensured, the influence of rubber material remaining on the taper hole of the sleeve shell on the sealing performance is effectively avoided, the rubber material is prevented from entering the through hole to affect the function of the spring, and the excess rubber material is accumulated on the limiting step, so that the rubber material can be concentratedly cleaned after being used for a period of time.

[0024] 3. The taper of the sleeve core and the taper hole of the sleeve shell have a taper difference, when the taper side wall cooperates with the limiting step, the end of the taper and the taper hole of the sleeve shell will remain a small gap or directly contact, and a containing part is formed together with the limiting step, and double sealing is formed, which further prevents the rubber material from entering the through hole. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is a schematic view of a spring air hole sleeve embedded in a mold.

[0026] Fig. 2 It is a spring air hole sleeve magnified schematic view inlayed in a mold;

[0027] Fig. 3 It is a partial schematic view of the sleeve shell cone hole of the utility model;

[0028] Fig. 4 It is a schematic view of the prior spring air hole sleeve.

[0029] In the figure: 1-sleeve shell, 2-sleeve core, 3-tapered table, 4-sleeve shell cone hole, 5-through hole, 6-elastic member, 7-limiting part, 8-limiting hole, 9-arc surface, 10-limiting step. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of those skilled in the art, the utility model is further explained below in combination with the drawings.

[0031] As shown in Figs. 1 to 4 , a spring air hole sleeve, comprising a sleeve shell 1 with a through hole 5, a sleeve core 2 is arranged in the through hole 5, the through hole 5 is provided with a sleeve shell cone hole 4 at one end, and the sleeve core 2 is provided with a tapered table 3 at one end and matched with the sleeve shell cone hole 4.

[0032] The through hole 5 is further provided with an elastic member 6, the elastic member 6 makes the tapered table 3 at the end of the sleeve core 2 have a tendency to move away from the sleeve shell cone hole 4, and the elastic member 6 will form an exhaust gap between the tapered table 3 at the end of the sleeve core 2 and the sleeve shell cone hole 4, specifically, the elastic member 6 is preferably a spring, and the spring is sleeved on the sleeve core 2.

[0033] The sleeve shell cone hole 4 is provided with a limiting step 10, when the tapered table 3 end face is compressed by the elastic member 6 under external force, the tapered table 3 side wall can abut against the limiting step 10, so as to achieve the sealing purpose.

[0034] The tapered table 3 end face is always lower than the sleeve shell 1 end face at the sleeve shell cone hole 4, that is, the tapered table 3 is still in the sleeve shell cone hole 4 even under the elastic force of the elastic member 6. Specifically, when the tapered table 3 end face is not stressed, the distance between the tapered table 3 end face and the sleeve shell 1 end face at the sleeve shell cone hole 4 is 0-0.15mm. Thus, the rubber material flows above the spring air hole sleeve during the entire vulcanization process.

[0035] Further, the above structure can avoid the scratch of the protruding sleeve core 2 part to the tire blank, ensure the vulcanization quality of the tire tread, and prevent the tire blank from exerting a large eccentric force on the sleeve core 2 when scratching, thereby affecting the normal expansion and contraction of the spring air hole sleeve, causing overflow, eccentricity of the sleeve core 2 and other conditions at this place, and thus indirectly improving the service life of the spring air hole sleeve. It can be understood that during the tire vulcanization process, the tire blank is not in contact with all the sleeve cores 2 of the spring air hole sleeve at the same time, but only in some cases, the protruding sleeve core 2 affects the flow of the rubber material of the tire blank.

[0036] The small-diameter end diameter of the sleeve shell conical hole 4 is greater than the diameter of the through hole 5, a limiting step 10 is formed between the small-diameter end of the sleeve shell conical hole 4 and the through hole 5, when the end face of the conical platform 3 is compressed by an external force to compress the elastic element 6, that is, when the rubber material flows through the spring air hole sleeve, a force is applied to the end face of the conical platform 3, the conical platform 3 side wall of the sleeve core 2 can form line-surface contact with the limiting step 10 to realize closure, thereby ensuring the reliability of the sealing and preventing the rubber material from entering the through hole 5 to affect the function of the elastic element 6.

[0037] In actual use, when the conical platform 3 is located in the sleeve shell conical hole 4, the rubber material will inevitably enter the end of the sleeve shell conical hole 4, if a conventional conical surface is used, the rubber material remaining on the side wall of the sleeve shell conical hole 4 will gradually accumulate, thereby affecting the conical surface sealing of the sleeve core 2 and the sleeve shell 1, and the limiting step 10 provided in the sleeve shell 1 can control the stroke of the sleeve core 2 and effectively prevent the rubber material remaining on the sleeve shell conical hole 4 from affecting the sealing performance, and the excess rubber material is accumulated on the limiting step 10, which can be cleaned after a period of use.

[0038] The taper of the conical platform 3 is preferably 5-25° larger than the taper of the sleeve shell conical hole 4, and the stroke of the sleeve core 2 will be affected due to the difference in tapers, so the taper difference between the conical platform 3 and the sleeve shell conical hole 4 is set according to the requirements in actual use. When the conical platform 3 side wall cooperates with the limiting step 10, a small gap or direct contact is reserved between the end of the conical platform 3 and the sleeve shell conical hole 4, a containing part is formed together with the limiting step 10, and double sealing is formed, which further prevents the rubber material from entering the through hole 5.

[0039] The taper C of the conical platform 3 is preferably 30-60°, and the taper of the conical platform 3 in the specific embodiment is 48°.

[0040] The through hole 5 is provided with a limiting hole 8 at the other end, the sleeve core 2 penetrates through the limiting hole 8 and is provided with a limiting part 7, when the conical platform 3 at the end of the sleeve core 2 and the sleeve shell conical hole 4 form an exhaust gap, the limiting part 7 abuts against the end of the limiting hole 8, and the limiting part 7 is preferably provided with an exhaust groove, or the limiting part 7 is provided with a cross-shaped boss structure, which can ensure smooth exhaust passage while meeting the limiting requirements.

[0041] Further, the surface of the limiting part 7 abutting against the end of the limiting hole 8 is preferably provided with an arc surface 9, which is simple and easier to process, and the arc surface 9 can ensure that the stress is more uniform during assembly of the limiting part 7 and the limiting hole 8, and the arc surface 9 is easier to maintain smoothness, thereby ensuring good activity of the sleeve core 2 during vulcanization.

[0042] The utility model discloses a limiting hole 8 diameter is less than the diameter of through -hole 5, and the limiting hole 8 and the transition step between through -hole 5 form, and the one end of elastic part 6 abuts at the root of cone 3, and the other end of elastic part 6 abuts on the transition step, and elastic part 6 preferably is set as conical spring, and the small diameter section of conical spring is close to cone 3, to make spring gas hole more smooth in the early stage of exhaust, and have absolute advantage in the exhaust, and the large diameter end of conical spring will make the spring in the extension degree of shell 1, and guarantee enough elastic performance.

[0043] It should be understood that the use of these embodiments is only for illustrating the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A spring air hole sleeve, characterized by, The sleeve (1) comprises a through hole (5) with a sleeve core (2) arranged in the through hole (5), and a sleeve taper hole (4) arranged at one end of the through hole (5), and a taper (3) arranged at one end of the sleeve core (2) and matched with the sleeve taper hole (4); An elastic member (6) is further arranged in the through hole (5), so that the taper (3) at the end of the sleeve core (2) has a tendency to move away from the sleeve taper hole (4), and an exhaust gap is formed between the taper (3) at the end of the sleeve core (2) and the sleeve taper hole (4), and the end face of the taper (3) is always lower than the end face of the sleeve (1) at the sleeve taper hole (4); The sleeve taper hole (4) is provided with a limiting step (10), and when the end face of the taper (3) is compressed by an external force, the side wall of the taper (3) can abut against the limiting step (10).

2. A spring vent sleeve according to claim 1, wherein, When the end face of the taper (3) is not stressed, the end face of the taper (3) is 0-0.15mm away from the end face of the sleeve (1) at the sleeve taper hole (4).

3. A spring vent sleeve according to claim 1, wherein, The diameter of the small-diameter end of the sleeve taper hole (4) is greater than the diameter of the through hole (5), and the limiting step (10) is formed between the small-diameter end of the sleeve taper hole (4) and the through hole (5).

4. A spring vent sleeve according to claim 1, wherein, The taper of the taper (3) of the sleeve core (2) is 5-25° larger than the taper of the sleeve taper hole (4).

5. A spring vent sleeve according to claim 1, wherein, The taper of the taper (3) is 30-60°. Or, the taper of the taper (3) is 48°.

6. A spring vent sleeve according to claim 1, wherein, The other end of the through hole (5) is provided with a limiting hole (8), and the other end of the sleeve core (2) penetrates through the limiting hole (8) and is provided with a limiting portion (7); When the elastic member (6) forms an exhaust gap between the taper (3) at the end of the sleeve core (2) and the sleeve taper hole (4), the limiting portion (7) abuts against the end of the limiting hole (8).

7. A spring vent sleeve according to claim 6, wherein The surface of the limiting portion (7) abutting against the end of the limiting hole (8) is an arc surface (9).

8. A spring vent sleeve according to claim 6, wherein, The limiting portion (7) is provided with an exhaust groove, or the limiting portion (7) is provided with a cross-shaped boss structure.

9. A spring vent sleeve according to claim 6, wherein, The diameter of the limiting hole (8) is smaller than the diameter of the through hole (5), and a transition step is formed between the limiting hole (8) and the through hole (5); One end of the elastic member (6) abuts against the root of the taper (3), and the other end of the elastic member (6) abuts against the transition step.

10. The spring vent sleeve of claim 1, wherein, The elastic member (6) is a conical spring, and the small-diameter section of the conical spring is close to the exhaust gap.

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