阅读说明：本技术 一种高性能的弹簧气孔套 (High-performance spring air hole sleeve ) 是由 吴文朝 于 2020-09-29 设计创作，主要内容包括：一种高性能的弹簧气孔套,包括阀壳、芯轴和弹簧,芯轴两端是锥台部和止口部,阀壳的孔腔一端是与芯轴的锥台部密封配合的锥孔,另一端是将芯轴的止口部限制在阀壳外部的挡位部,弹簧套在芯轴上,两端分别抵靠在锥台部和挡位部；芯轴在止口部顶端或者所述的阀壳在挡位部顶端设置缺口槽形成多瓣式构造；阀壳整体呈圆柱阶梯,挡位部外圆柱的端部为圆锥面,锥孔处外圆柱的表面有若干个平行布置的周环槽；芯轴的锥台部与轴身的连接处具有直径大于轴身的过渡轴段,过渡轴段与锥台部的连接点设有弧形环槽,芯轴的锥台部端面设置成蘑菇头形状。本发明能够与模具排气口的配合精度更高,稳定性更好,排气效果更佳,硫化后产品美观平整,产品质量更佳。(A high-performance spring air hole sleeve comprises a valve shell, a mandrel and a spring, wherein a frustum part and a spigot part are arranged at two ends of the mandrel, a taper hole which is in sealing fit with the frustum part of the mandrel is arranged at one end of a hole cavity of the valve shell, the spigot part of the mandrel is limited at a gear part outside the valve shell at the other end of the hole cavity of the valve shell, the spring is sleeved on the mandrel, and two ends of the spring are respectively abutted against the frustum part and the gear part; the top end of the spigot part of the mandrel or the top end of the gear part of the valve shell is provided with a notch groove to form a multi-flap structure; the valve shell is integrally in a cylindrical step shape, the end part of the outer cylinder of the gear part is a conical surface, and the surface of the outer cylinder at the conical hole is provided with a plurality of circumferential grooves which are arranged in parallel; the connecting part of the frustum part and the shaft body of the mandrel is provided with a transition shaft section with the diameter larger than that of the shaft body, an arc-shaped annular groove is arranged at the connecting point of the transition shaft section and the frustum part, and the end face of the frustum part of the mandrel is in a mushroom head shape. The invention can be matched with the exhaust port of the mold with higher precision, better stability and better exhaust effect, and the vulcanized product is beautiful and flat and has better product quality.)

1. A high-performance spring air hole sleeve comprises a valve shell (200), a mandrel (100) and a spring, wherein a frustum part (104) and a spigot part (101) are respectively arranged at two ends of the mandrel (100), the mandrel (100) is installed in the valve shell (200), the valve shell (200) is provided with a hole cavity (205) which is through up and down, one end of the hole cavity (205) is a tapered hole (203) which is in sealing fit with the frustum part (104) of the mandrel (100), the other end of the hole cavity is a stop part (207) which limits the spigot part (101) of the mandrel (100) to the outside of the valve shell (200), the spring is sleeved on the mandrel (100), and two ends of the spring are respectively abutted against the end faces of the frustum part (104) and the stop part (207); the method is characterized in that: the mandrel (100) is provided with a notch A (107) at the top end of the spigot part (101) to form a multi-flap structure of the spigot part (101), the notch A (107) extends to the shaft body (102) of the mandrel (100) along the axial direction, or the valve casing (200) is provided with a notch B (206) at the top end of the gear part (207) to form the multi-flap structure of the position, and the notch B (206) extends to the valve body of the valve casing (200) along the axial direction; the valve shell (200) is integrally in a two-stage cylindrical step shape, the outer diameter of a second outer cylinder (202) corresponding to the tapered hole (203) is larger than the outer diameter of a first outer cylinder (201) corresponding to the stop part (207), the end part of the first outer cylinder (201) is a conical surface, and a plurality of circumferential grooves (204) which are arranged in parallel are formed on the surface of the second outer cylinder (202); the connecting part of the frustum part (104) and the shaft body (102) of the mandrel (100) is provided with a transition shaft section (103) with the diameter larger than that of the shaft body (102), an arc-shaped annular groove (106) is arranged at the connecting point of the transition shaft section (103) and the frustum part (104), and the end face of the frustum part (104) of the mandrel (100) is arranged into a mushroom head shape (105).

2. The high performance spring pocket of claim 1, further comprising: when the number of the circumferential ring grooves (204) is multiple, the circumferential ring grooves (204) are communicated through longitudinal grooves parallel to the axial direction and then extend to the step transition position of the valve shell (200).

3. The high performance spring pocket of claim 2, wherein: the longitudinal grooves are one or two/more in circumferential symmetrical distribution.

4. A high performance spring vent sleeve as defined in claim 1 or 2, wherein: the stop opening part (101) is a truncated cone body or a combination body of a cylinder and a round-head cone.

5. The high performance spring pocket of claim 4, wherein: the blocking portion (207) of the valve shell (200) is a cylindrical hole, and the aperture of the cylindrical hole is smaller than the inner diameter of the hole cavity (205).

6. The high performance spring pocket of claim 4, wherein: the position blocking portion (207) of the valve casing (200) is a step hole, the large-hole-diameter end of the step hole is located on the outer side, and the maximum hole diameter of the step hole is smaller than the inner diameter of the hole cavity (205).

7. The high performance spring pocket of claim 4, wherein: the blocking part (207) of the valve shell (200) is a conical hole, a large-diameter opening of the conical hole is positioned on the outer side, and the maximum diameter of the conical hole is smaller than the inner diameter of the hole cavity (205).

8. A high performance spring vent sleeve according to claim 1, 2 or 3, wherein: the junction of the first outer cylinder (201) and the second outer cylinder (202) of the valve housing (200) is in conical transition.

9. A high performance spring vent sleeve according to claim 1, 2 or 3, wherein: a hole cavity (205) of the valve shell (200) is provided with chamfer structures at the hole end matched with the stop part (101) and the inner hole shoulder.

Technical Field

The invention relates to an exhaust accessory of a tire vulcanization forming mold, in particular to a high-performance spring air hole sleeve, and belongs to the technical field of tire vulcanization.

Background

Conventionally, in the manufacture of a tire, it is known that in a mold for vulcanizing a green tire having been subjected to a molding process, it is necessary to discharge air between the green tire and the mold, and a plurality of air discharge ports are provided in the mold. When the tire is vulcanized, the exhaust port is directly utilized for exhausting, and the rubber can penetrate through the exhaust port to overflow, so that a lot of overflowed rubber is formed on the tire after vulcanization is finished.

The structure of the vent sleeve generally comprises a shell and a valve body, wherein the valve body is arranged in the shell, one end of the valve body is limited outside the shell, and a vent notch is formed in a shell at the end part; the other end of the valve body is matched with the shell through a sealing surface, and the end part of the air hole sleeve is directly arranged in the air outlet; the valve body is provided with a spring, the seal of the valve body and the shell is disconnected by the spring in an initial state, and the gas in the die cavity is discharged by the disconnected seal.

In whole use, require than higher to the installation cooperation degree of gas pocket cover in the gas vent, the easy production of too pine is rocked, influences the result of use, has the risk that drops, and too tightly then there is the shortcoming of the not convenient to dismantle change.

In addition, the valve body of the air hole sleeve is directly contacted with the tire rubber, and the depth of the valve body penetrating into the rubber influences the appearance of the tire. The end face of the valve body of the existing air hole sleeve is a plane, when the valve body and the shell generate axial position difference, a groove with obvious section difference can be generated on a tire, when the valve body and the shell are integrally installed, uneven appearance is easily generated on the tire tread, and particularly, the appearance is more obvious on the cambered surface of the tire tread, so that the product quality is influenced.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the high-performance spring air hole sleeve, the matching precision of the spring air hole sleeve and the air outlet of the mold is higher, the stability is better, the air exhaust effect is better, the vulcanized product is attractive and flat, and the product quality is better.

The technical scheme adopted by the invention for solving the technical problems is as follows: the mandrel is arranged in the valve shell, the valve shell is provided with a through hole cavity, one end of the hole cavity is a taper hole in sealing fit with the frustum part of the mandrel, the other end of the hole cavity is a gear part limiting the spigot part of the mandrel outside the valve shell, the spring is sleeved on the mandrel, and two ends of the spring are respectively abutted against the end faces of the frustum part and the gear part; the top end of the spigot part of the mandrel is provided with a notch groove A to form a multi-flap structure of the spigot part, the notch groove A extends to the shaft body of the mandrel along the axial direction of the mandrel, or the top end of the gear part of the valve casing is provided with a notch groove B to form a multi-flap structure of the position, and the notch groove B extends to the valve body of the valve casing along the axial direction of the valve casing; the valve shell is integrally in a two-stage cylindrical step shape, the outer diameter of a second outer cylinder corresponding to the taper hole is larger than that of a first outer cylinder corresponding to the gear part, the end part of the first outer cylinder is a conical surface, and a plurality of circumferential grooves which are arranged in parallel are formed on the surface of the second outer cylinder; the connecting part of the frustum part and the shaft body of the mandrel is provided with a transition shaft section with the diameter larger than that of the shaft body, an arc-shaped annular groove is arranged at the connecting point of the transition shaft section and the frustum part, and the end surface of the frustum part of the mandrel is set into a mushroom head shape.

Compared with the prior art, the high-performance spring air hole sleeve has the advantages that the peripheral annular groove is formed in the outer portion of the valve shell, the air leakage effect is achieved, and the purposes of improving the installation precision and preventing shaking are finally achieved. The design of the arc-shaped ring groove can reduce the corner cleaning of the contact part, so that the positioning is more reliable, better matching precision is further ensured, the shaking is prevented, and the using effect is good; the structural strength of sealed face lower part can be strengthened in the design of transition shaft section, and the stress point is not fragile when dismantling, reaches high-efficient dismouting, the reuse of being convenient for. The mushroom head type valve core end face is adopted, so that a section difference is not easy to generate when the tire is vulcanized, the appearance of the vulcanized tire is improved, and the product quality is improved. In conclusion, the comprehensive use performance of the spring air hole sleeve is greatly improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of a first mandrel of the present invention.

Fig. 2a is a front view in half section of a first valve housing of the present invention.

Fig. 2b is a left side view of the first valve housing of the present invention.

Fig. 2c is an assembly of the first mandrel of the invention with a first valve housing, which is shown in half-section and in which the spring has been omitted.

Fig. 3a is a front view in half section of a valve housing according to a second embodiment of the invention.

Fig. 3b is a left side view of a second valve housing of the present invention.

Fig. 3c is an assembly of the first mandrel of the invention with a second valve housing, shown in half-section and with the spring omitted.

Fig. 4a is a front view in half section of a third valve housing of the present invention.

Fig. 4b is a left side view of a third valve housing of the present invention.

Fig. 4c is an assembly of the first mandrel of the invention with a third valve housing, shown in half-section, with the spring omitted.

Fig. 5 is a schematic view of a second mandrel of the present invention for use in assembly with first, second and third valve housings.

Fig. 6 is a schematic structural view of a third mandrel of the present invention.

Fig. 7 is a schematic structural view of a fourth mandrel of the present invention.

Fig. 8 is a front view, in half section, of a fourth valve housing of the present invention for use with the third and fourth mandrels.

Fig. 9 is a front view, in half section, of a fifth valve housing of the present invention for use with third and fourth mandrels.

Fig. 10 is a front view, in half section, of a sixth valve housing of the present invention for use with the third and fourth mandrels.

In the figure, 100, a mandrel, 101, a spigot portion, 102, a shaft body, 103, a transition shaft section, 104, a frustum portion, 105, a mushroom head shape, 106, an arc-shaped ring groove, 107, a notch groove A, 200, a valve casing, 201, a first outer cylinder, 202, a second outer cylinder, 203, a taper hole, 204, a circumferential ring groove, 205, a bore, 206, a notch groove B, 207 and a retainer portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.

The first preferred embodiment:

as shown in fig. 1, 2a, 2b and 2c, the high performance spring air hole sleeve provided by the present embodiment includes a valve housing 200, a mandrel 100 and a spring, wherein two ends of the mandrel 100 are respectively a cone portion 104 and a spigot portion 101, the mandrel 100 is installed in the valve housing 200, the valve housing 200 has a through hole 205, one end of the hole 205 is a cone hole 203 which is in sealing fit with the cone portion 104 of the mandrel 100, the other end is a stopper portion 207 which limits the spigot portion 101 of the mandrel 100 outside the valve housing 200, and the spring sleeve is arranged on the mandrel 100, and two ends of the spring sleeve respectively abut against end faces of the cone portion 104 and the stopper portion 207; the valve housing 200 is provided with a notch B206 at the top end of the gear portion 207 to form a multi-lobe structure at the position, and the notch B206 extends to the valve body along the axial direction of the valve housing 200; the valve casing 200 has a two-stage cylindrical step shape as a whole, and comprises a second outer cylinder 202 corresponding to the tapered hole 203 and a first outer cylinder 201 corresponding to the gear portion 207, wherein the outer diameter of the second outer cylinder 202 is larger than that of the first outer cylinder 201, and preferably, the joint of the first outer cylinder 201 and the second outer cylinder 202 of the valve casing 200 is in a conical surface transition; the end part of the first outer cylinder 201 is a conical surface, and the surface of the second outer cylinder 202 is provided with a plurality of peripheral annular grooves 204 which are arranged in parallel; the junction of the frustum part 104 and the shaft body 102 of the mandrel 100 is provided with a transition shaft section 103 with a diameter larger than that of the shaft body 102, obviously, the diameter of the transition shaft section 103 needs to be smaller than the minimum diameter of the frustum part 104, the junction of the transition shaft section 103 and the frustum part 104 is provided with an arc-shaped annular groove 106, and the end surface of the frustum part 104 of the mandrel 100 is provided with a mushroom head shape 105.

In this embodiment, the seam allowance part 101 is a combination of a cylinder and a round-nose cone. Valve casing 200's fender position portion 207 is the step hole, and the big aperture end of step hole is located the outside, and the biggest aperture of step hole is less than the internal diameter of vestibule 205. In order to satisfy the design function of the structure itself, the minimum bore diameter of the stepped bore needs to be larger than the diameter of the shaft body 102 of the mandrel and smaller than the maximum outer diameter of the spigot portion 101 of the mandrel 100, and the maximum bore diameter of the stepped bore is smaller than the maximum outer diameter of the spigot portion 101 of the mandrel 100.

In a preferred embodiment, when the circumferential grooves 204 are plural, the circumferential grooves 204 communicate with each other through longitudinal grooves parallel to the axial direction and then extend to the step transition position of the valve housing 200. Specifically, the longitudinal grooves are one or two/more in circumferential symmetrical distribution. The effect in vertical breach groove is fixed mounting position, prevents to rock, further promotes the installation accuracy.

In a preferred embodiment, the bore 205 of the valve housing 200 is chamfered at the mating end of the spigot 101 and at the inner shoulder thereof to facilitate the insertion and removal of the mandrel 100 from the bore 205 of the valve housing 200.

The second preferred embodiment:

as shown in fig. 1, fig. 3a, fig. 3b and fig. 3c, the present embodiment provides a high performance spring porous sleeve, which is different from the first preferred embodiment in that in the present embodiment, the gear portion 207 of the valve housing 200 is a cylindrical hole, and the diameter of the cylindrical hole is smaller than the inner diameter of the bore 205. In order to satisfy the design function of the structure itself, the bore diameter of the cylindrical hole needs to be larger than the diameter of the shaft body 102 of the mandrel 100 and smaller than the maximum outer diameter of the spigot portion 101 of the mandrel 100.

The third preferred embodiment:

as shown in fig. 1, 4a, 4b and 4c, the present embodiment provides a high performance spring air hole sleeve, which is different from the first preferred embodiment in that in the present embodiment, the stop portion 207 of the valve housing 200 is a conical hole, a large diameter opening of the conical hole is located at the outer side, and a maximum diameter of the conical hole is smaller than the inner diameter of the bore 205. In order to satisfy the design function of the structure itself, the maximum bore diameter of the conical bore needs to be larger than the diameter of the shaft body 102 of the mandrel 100 and smaller than the maximum outer diameter of the spigot portion 101 of the mandrel 100.

The preferred embodiment four:

as shown in fig. 5, fig. 2a, fig. 2b and fig. 2c, the present embodiment provides a high performance spring air hole sleeve, which is different from the first preferred embodiment in that in the present embodiment, the spigot portion 101 is a truncated cone, which is the same as the combination of a cylinder and a truncated cone, and is beneficial to increasing the force application contact area, so as to facilitate rapid assembly and disassembly.

Preferred embodiment five:

as shown in fig. 5, fig. 3a, fig. 3b and fig. 3c, the present embodiment provides a high performance spring porous sleeve, which is different from the second preferred embodiment in that in the present embodiment, the spigot portion 101 is a truncated cone.

Preferred embodiment six:

as shown in fig. 5, 4a, 4b and 4c, the present embodiment provides a high performance spring porous sleeve, which is different from the third preferred embodiment in that in the present embodiment, the spigot 101 is a truncated cone.

The preferred embodiment is seven:

as shown in fig. 6 and 8, the present embodiment provides a high performance spring air hole sleeve, which is different from the first preferred embodiment in that, in the present embodiment, the mandrel 100 is provided with a notch a107 at the top end of the spigot portion 101 to form a multi-lobe configuration of the spigot portion 101, and the notch a107 extends to the shaft body 102 of the mandrel 100 along the axial direction.

Preferred embodiment eight:

as shown in fig. 6 and 9, the present embodiment provides a high performance spring porous sleeve, which is different from the seventh preferred embodiment in that in the present embodiment, the gear portion 207 of the valve housing 200 is a cylindrical hole, and the diameter of the cylindrical hole is smaller than the inner diameter of the bore 205.

The preferred embodiment is nine:

as shown in fig. 6 and 10, the present embodiment provides a high performance spring air hole sleeve, which is different from the seventh preferred embodiment in that in the present embodiment, the stop portion 207 of the valve housing 200 is a conical hole, the large diameter opening of the conical hole is located at the outer side, and the maximum diameter of the conical hole is smaller than the inner diameter of the bore 205.

Preferred embodiment ten:

as shown in fig. 7 and 8, the present embodiment provides a high performance spring air hole sleeve, which is different from the seventh preferred embodiment in that in the present embodiment, the spigot portion 101 is a truncated cone.

The preferred embodiment eleven:

as shown in fig. 7 and fig. 9, the present embodiment provides a high performance spring air hole sleeve, which is different from the seventh preferred embodiment in that in the present embodiment, the spigot portion 101 is a truncated cone.

Preferred embodiment twelve:

as shown in fig. 7 and 10, the present embodiment provides a high performance spring air hole sleeve, which is different from the seventh preferred embodiment in that in the present embodiment, the spigot portion 101 is a truncated cone.

Before the spring air vent sleeve is used, the valve shell 200, the mandrel 100 and a spring are assembled to obtain a finished spring air vent sleeve, at the moment, the sealing matching between the valve shell 200 and the mandrel 100 is released under the action of the spring, namely, the frustum part 104 of the mandrel 100 is not contacted with the taper hole 203 of the valve shell 200, then a plurality of spring air vent sleeves are respectively arranged in each air outlet of a forming die, and then vulcanization treatment is carried out; the excessive gas enters the cavity 205 of the valve housing 200 through the clearance between the frustum part 104 of the mandrel 100 and the taper hole 203 of the valve housing 200 during vulcanization and is discharged to the outside through the notch groove A107 or the notch groove B206, and the sealing fit between the valve housing 200 and the mandrel 100 is formed under the action of external force when vulcanization is finished; and taking out the vulcanized tire, so that the external force disappears, the spring air hole sleeve is restored to the initial state under the elastic force restoring action of the spring, and then the spring air hole sleeve is detached from the air outlet one by one and can be repeatedly used for next tire vulcanization mold cavity air exhaust.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiment according to the technical spirit of the present invention are included in the protection scope of the present invention.