CN214447741U - Exhaust device and tire vulcanization mold with same - Google Patents

Abstract

The utility model provides an exhaust apparatus and have its tire vulcanization mould utensil, wherein, exhaust apparatus, include: a jacket; the inner sleeve is arranged in the outer sleeve in a penetrating mode, the inner sleeve is in limit fit with the outer sleeve, and a first discharge channel is formed between the inner sleeve and the outer sleeve; the plug shaft penetrates through the inner sleeve, the plug shaft is in limit fit with the inner sleeve, and a second discharge channel is formed between the plug shaft and the inner sleeve; the inner sleeve is fixedly arranged in the outer sleeve, and the first discharge channel is in a normally open state; and/or the plug shaft is fixed in the inner sleeve, and the second discharge passage is in a normally open state. The technical scheme of the application effectively solves the problems that the inner side valve rod part in the related technology has too large stroke and is easy to feed rubber.

Description

Exhaust device and tire vulcanization mold with same

Technical Field

The utility model relates to a tire production field particularly, relates to an exhaust apparatus and have its tire vulcanization mould utensil.

Background

The core problem of tire production at present is that when the tire is vulcanized, the air in the inner cavity of the tire mold needs to be exhausted in the mold closing process of the segmented mold, and the common exhaust holes can exhaust the rubber material from the air holes while exhausting the air, so that a lot of rubber burrs are formed on the side surface of the tire, and an additional process is needed to remove the rubber burrs formed on the tire.

In order to avoid the occurrence of burrs on a tire product, a tire vulcanizing mold and a method for manufacturing a tire have been developed, and a patent publication No. CN111098536A discloses a tire vulcanizing mold, as shown in fig. 1 and 2, which includes: a forming surface 1 in contact with the outer surface of the tyre placed in the moulding cavity 15. The molding surface 1 is provided with: and a vent hole 16 that communicates the inside (cavity 15) and the outside of the tire vulcanizing mold. During vulcanization molding, air between the tire and the molding surface 1 is discharged through the vent holes 16. The vent hole 16 of the molding surface 1, which is open, is fitted with a vent plug 2.

As shown in fig. 1, the exhaust passage 21 is opened and the vent plug 2 is in an open state. In the open state, the head 41h of the outer stem member 41 pushed up by the outer spring 51 is separated from the valve seat 31. The head 42h of the inner stem member 42 pushed up by the inner spring 52 is separated from the inner surface of the head 41h of the outer stem member 41. While the vent plug 2 is in the open state, the air in the cavity 15 is discharged to the outside of the tire vulcanizing mold via the air discharge passage 21 in accordance with the movement of the outer surface of the tire to approach the molding surface 1. The exhaust passage 21 is formed by: the outer inlet Es and the inner inlet Eu extend from the outer inlet Es to the periphery of the body portions 41b and 42b, and the through holes 32 and 41 k.

As shown in fig. 2, the exhaust passage 21 is closed and the vent plug 2 is in a closed state. In the closed state, the head portion 41h pushed down by the outer surface Ts of the tire is seated on the valve seat 31, and similarly, the head portion 42h is in contact with (seated on) the inner surface of the head portion 41 h. The outer side surface of the head 41h is formed as: a cone shape corresponding to the valve seat 31. In addition, the side surface of the head portion 42h is formed as: a taper corresponding to the inner side surface of the head portion 41 h. In the present embodiment, in the closed state, the configuration is such that: the top surface 41t of the outer stem member 41 facing the mold cavity 15 is flush with the top surface 42t of the inner stem member 42, but is not limited thereto. When the outer surface Ts of the tire leaves the molding surface 1, the valve stem 4 is pushed up by the spring 5 to become an open state shown in fig. 1.

As is apparent from the disclosure of the above patent application document, the outer inlet portion Es is opened when the head portion 41h of the outer stem member 41 is separated from the valve seat 31. At this time, the top surface 41t of the outer stem member 41 has a first distance from the molding surface 1, and the inner inlet portion Eu is opened when the head portion 42h of the inner stem member 42 is separated from the inner surface of the head portion 41h of the outer stem member 41, and at this time, the top surface 42t of the inner stem member 42 has a second distance from the top surface 41t of the outer stem member 41. In this way, the head 42h of the inner stem member 42 can extend beyond the molding surface 1 by two strokes.

Therefore, although the air displacement of the vent hole plug is increased by adopting the design scheme of adding two springs and two strokes in the patent application document, the problem of overlarge stroke of the inner valve rod part exists, the problem that the stroke precision of the inner valve rod part is poor and the superposition is difficult to control exists, and the problem that the coaxiality of the inner valve rod part, the outer valve rod part and the valve seat is poor exists, so that the vent hole plug is easy to feed glue.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an exhaust apparatus and have its tire vulcanization mould utensil to solve the too big problem of inboard valve rod part stroke among the correlation technique, and have the poor stack uncontrollable problem of inboard valve rod part stroke precision, and the relatively poor problem of inboard valve rod part, outside valve rod part, disk seat axiality, lead to the problem that the ventilation hole stopper advances the sizing material easily.

In order to achieve the above object, according to an aspect of the present invention, there is provided an exhaust apparatus including: a jacket; the inner sleeve is arranged in the outer sleeve in a penetrating mode, the inner sleeve is in limit fit with the outer sleeve, and a first discharge channel is formed between the inner sleeve and the outer sleeve; the plug shaft penetrates through the inner sleeve, the plug shaft is in limit fit with the inner sleeve, and a second discharge channel is formed between the plug shaft and the inner sleeve; the inner sleeve is fixedly arranged in the outer sleeve, and the first discharge channel is in a normally open state; and/or the plug shaft is fixed in the inner sleeve, and the second discharge passage is in a normally open state.

Further, the inner sleeve is movably arranged in the outer sleeve in a penetrating mode, the first discharging channel is switched between a normally open state and a closed state, the plug shaft is fixedly installed in the inner sleeve, and the second discharging channel is in the normally open state.

Furthermore, the exhaust device further comprises a first spring, the first spring is sleeved outside the inner sleeve, the outer sleeve is provided with a first end and a second end, the inner sleeve is provided with a first end and a second end, the first spring is respectively abutted between the first end of the inner sleeve and the second end of the outer sleeve, and the inner sleeve can overcome the elasticity of the first spring under the action of external force so that the inner sleeve moves axially relative to the outer sleeve to close the first exhaust channel.

Furthermore, the outer sleeve comprises a first sleeve body, the inner sleeve comprises a second sleeve body, the second sleeve body comprises a first sleeve section and a second sleeve section, the outer diameter of the second sleeve section is smaller than that of the first sleeve section, the first spring is sleeved outside the second sleeve section, a first step surface is formed between the first sleeve section and the second sleeve section, and the first spring is respectively abutted between the first step surface and the second end of the outer sleeve.

Further, the plug shaft is movably arranged in the inner sleeve in a penetrating mode, the second discharge channel is switched between a normally open state and a closed state, the inner sleeve is fixedly installed in the outer sleeve, and the first discharge channel is in the normally open state.

Furthermore, the exhaust device further comprises a second spring, the second spring is sleeved outside the plug shaft, the plug shaft is provided with a first end and a second end, the inner sleeve is provided with a first end and a second end, the second spring abuts between the first end of the plug shaft and the second end of the inner sleeve respectively, and the plug shaft can overcome the elasticity of the second spring under the action of external force so as to enable the plug shaft to axially move relative to the inner sleeve and further close the second exhaust channel.

Further, the stopper axle includes the axis body, and the axis body includes first axle section and diameter size is less than the second axle section of first axle section, and the second spring cover is established outside the second axle section, forms the second step face between first axle section and the second axle section, and the second spring is respectively the butt between the second end of second step face and endotheca.

Further, the outer sleeve comprises a first sleeve body and a first annular table arranged on the inner wall of the first sleeve body; the inner sleeve comprises a second sleeve body, a first sleeve ring and a second sleeve ring which are arranged on the outer wall of the second sleeve body at intervals, the first sleeve ring is positioned at the first end of the second sleeve body, and the inner sleeve also comprises a second annular platform arranged on the inner wall of the second end of the second sleeve body; the plug shaft comprises a shaft body, a first shaft ring and a second shaft ring which are arranged on the shaft body at intervals, and the first shaft ring is positioned at the end part of the shaft body; the first sleeve ring is in limit fit with the inner wall of the end part of the first sleeve body, and the second sleeve ring is in limit fit with the first ring platform; the first collar is in limit fit with the inner wall of the first end of the second sleeve body, the second collar is positioned at one end, away from the first end of the second sleeve body, of the second collar table, and the second collar is in limit fit with the second collar table; wherein, the inner sleeve is provided with a first through hole which penetrates through the inner sleeve and the outer sleeve, and part of the first through hole penetrates through the second sleeve ring; and/or the plug shaft is provided with a second through hole penetrating through the plug shaft, and part of the second through holes penetrate through the second collar.

Further, the outer sleeve comprises a first sleeve body and a first annular table arranged on the inner wall of the first sleeve body; the inner sleeve comprises a second sleeve body, a first sleeve ring and a second sleeve ring which are arranged on the outer wall of the second sleeve body at intervals; the plug shaft comprises a shaft body, a first collar and a second collar which are arranged on the shaft body at intervals; the outer diameter of the first lantern ring is gradually increased in the direction far away from the second lantern ring, and the inner diameter of the end part, corresponding to the first lantern ring, of the first lantern body is gradually reduced in the direction close to the first ring platform; and/or the outer diameter of the first collar is gradually increased in a direction away from the second collar, and the inner diameter of the first collar corresponding to the first collar is gradually reduced in a direction close to the second collar.

Furthermore, a first exhaust gap and a first exhaust groove which are communicated are formed between the outer wall of the first lantern ring and the inner wall of the first lantern body; and/or a second exhaust gap and a second exhaust groove which are communicated are arranged between the outer wall of the second collar and the inner wall of the second sleeve body.

According to the utility model discloses an on the other hand provides a tire vulcanization mould utensil, include: a molding surface having an open vent hole; and the exhaust device is arranged in the ventilation hole in a penetrating manner and is the exhaust device.

Use the technical scheme of the utility model, exhaust apparatus includes: the plug comprises an outer sleeve, an inner sleeve and a plug shaft. The inner sleeve is arranged in the outer sleeve in a penetrating mode, and a first discharge channel is formed between the inner sleeve and the outer sleeve. The plug shaft penetrates into the inner sleeve, and a second discharge channel is formed between the plug shaft and the inner sleeve. The exhaust device is installed in a vent hole on the tire vulcanizing mold. In this application, the inner sleeve is fixedly mounted in the outer sleeve, the first discharge passage is in a normally open state, and/or the plug shaft is fixed in the inner sleeve, and the second discharge passage is in a normally open state. Thus, when the exhaust device is opened, the exhaust area of the exhaust device can be increased through the first exhaust passage and the second exhaust passage, and the exhaust efficiency is improved. Meanwhile, the inner sleeve is fixedly arranged in the outer sleeve, and/or the plug shaft is fixed in the inner sleeve, so that the outer sleeve and/or the plug shaft do not need to move, and the rubber material is prevented from entering through the first discharge channel and/or the second discharge channel. Thereby leading the exhaust device not to be easy to feed the sizing material in the vulcanization process. Therefore, the technical scheme of the application effectively solves the problems that the stroke of the inner side valve rod component in the related technology is too large, the stroke precision of the inner side valve rod component is poor and is difficult to control, the centering precision of each component is ensured, and the problem that an exhaust device is easy to feed rubber is avoided.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic sectional view showing a related art exhaust apparatus installed in a vent hole in an open state;

FIG. 2 shows a schematic cross-sectional view of the exhaust apparatus of FIG. 1 installed in a vent hole and in a closed state;

fig. 3 shows a schematic cross-sectional view of a first embodiment of an exhaust device according to the present invention;

FIG. 4 shows a schematic front view of the jacket of FIG. 3;

FIG. 5 shows a schematic front view of the inner sleeve of FIG. 3;

fig. 6 shows a schematic cross-sectional view of an embodiment two of an exhaust apparatus according to the invention;

fig. 7 shows a schematic cross-sectional view of a third embodiment of an exhaust device according to the invention;

FIG. 8 shows an enlarged schematic view at A of the exhaust apparatus of FIG. 7; and

fig. 9 shows a front view schematic of the plug shaft of fig. 7.

Wherein the figures include the following reference numerals:

11. a first discharge passage; 12. a second discharge passage; 13. a first exhaust gap; 14. a second exhaust gap; 60. a jacket; 61. a first sleeve body; 611. a second tapered surface; 62. a first ring table; 621. a fourth conical surface; 66. a first annular groove; 67. a first straight groove; 68. a second annular groove; 69. a second straight groove; 70. an inner sleeve; 71. a first through hole; 72. a second sleeve body; 721. A first jacket segment; 722. a second jacket segment; 723. a first step surface; 724. a sixth conical surface; 73. a first collar; 731. a first conical surface; 74. a second collar; 741. a third conical surface; 75. a second ring table; 751. an eighth conical surface; 80. a plug shaft; 81. a second through hole; 82. a shaft body; 821. a first shaft section; 822. a second shaft section; 823. a second step surface; 824. a frustum; 83. a first collar; 831. a fifth conical surface; 84. a second collar; 841. a seventh taper surface; 91. a first spring; 92. a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 3 to 5, the exhaust apparatus according to the first embodiment includes: an outer sleeve 60, an inner sleeve 70, and a plug shaft 80. The inner sleeve 70 is arranged in the outer sleeve 60 in a penetrating mode, the inner sleeve 70 is in limit fit with the outer sleeve 60, and a first discharge channel 11 is formed between the inner sleeve 70 and the outer sleeve 60. The plug shaft 80 penetrates through the inner sleeve 70, the plug shaft 80 is in limit fit with the inner sleeve 70, and a second discharge channel 12 is formed between the plug shaft 80 and the inner sleeve 70. The exhaust device is installed in a vent hole on the tire vulcanizing mold. In the present application, the inner casing 70 is fixedly installed in the outer casing 60, and the first discharge passage 11 is in a normally open state. The stopper shaft 80 is fixed in the inner sleeve 70 and the second discharge passage 12 is in a normally open state.

And applying the technical scheme of the first embodiment, and installing the exhaust device into a vent hole on the tire vulcanization mold. In the first embodiment, the inner sleeve 70 is fixedly installed in the outer sleeve 60, and the first exhaust passage 11 is in a normally open state. The stopper shaft 80 is fixed in the inner sleeve 70 and the second discharge passage 12 is in a normally open state. In this way, when the exhaust device is opened, the exhaust area of the exhaust device can be increased by the first exhaust passage 11 and the second exhaust passage 12, and the exhaust efficiency can be improved. Meanwhile, the inner sleeve 70 is fixedly arranged in the outer sleeve 60, and the plug shaft 80 is fixed in the inner sleeve 70, so that the outer sleeve 60 and the plug shaft 80 do not need to move, the problem that the stroke precision is difficult to control is solved, the centering precision of the inner sleeve 70 is ensured, the centering performance of the outer sleeve 60 and the plug shaft 80 can also be ensured, the centering error is reduced, the centering performance of the exhaust device is good, and further rubber materials are prevented from entering through the first discharge channel 11 and the second discharge channel 12. Thereby leading the exhaust device not to be easy to feed the sizing material in the vulcanization process. Therefore, the technical scheme of the first embodiment effectively solves the problems that the inner side valve rod part in the related art has overlarge stroke and is easy to feed sizing materials.

As shown in fig. 3 to 5, the outer sheath 60 includes a first sheath body 61 and a first annular land 62 provided on an inner wall of the first sheath body 61. The inner sleeve 70 comprises a second sleeve body 72, a first sleeve ring 73 and a second sleeve ring 74 which are arranged on the outer wall of the second sleeve body 72 at intervals, the first sleeve ring 73 is positioned at the first end of the second sleeve body 72, and the inner sleeve 70 further comprises a second annular platform 75 arranged on the inner wall of the second end of the second sleeve body 72. The plug shaft 80 includes a shaft body 82, and a first collar 83 and a second collar 84 spaced apart from each other on the shaft body 82, the first collar 83 being located at an end of the shaft body 82. The first collar 73 is in limit fit with the inner wall of the end of the first sleeve 61, and the second collar 74 is in limit fit with the first annular table 62. This facilitates secure mounting of the inner sleeve 70 within the outer sleeve 60. The first collar 83 is in limit fit with the inner wall of the first end of the second sleeve body 72, the second collar 84 is located at one end of the second collar 75 far away from the first end of the second sleeve body 72, and the second collar 84 is in limit fit with the second collar 75. In this manner, securing of the plug shaft 80 within the inner sleeve 70 is facilitated. In the first embodiment, the inner sleeve 70 is provided with a first through hole 71 penetrating through the inner and outer parts thereof, and a part of the first through hole 71 penetrates through the second collar 74. The plug shaft 80 is provided with a second through hole 81 penetrating through the inside and outside thereof, and a part of the second through hole 81 penetrates through the second collar 84. In this way, the first through hole 71 is arranged to communicate the first discharge channel 11 and the second discharge channel 12 on the one hand, and also to communicate the vent hole with the second discharge channel 12; and on the other hand, the second collar 74 is made resilient. The second through hole 81 is arranged to communicate the second discharge passage 12 with the through hole on the one hand; on the other hand, the second collar 84 is made elastic.

Of course, in the embodiment not shown in the figures, the inner sleeve may be provided with a first through hole penetrating through the inner sleeve and the outer sleeve, and a part of the first through hole penetrates through the second sleeve ring. Or the plug shaft can be provided with a second through hole penetrating through the plug shaft, and part of the second through hole penetrates through the second collar.

In the present application, the end of the first sheath body 61 refers to the first end of the first sheath body 61. The end of the shaft body 82 refers to a first end of the shaft body 82.

Specifically, as shown in fig. 3 to 5, the first sleeve 73 is provided with a first tapered surface 731, the inner wall of the first end of the first sleeve body 61 is provided with a second tapered surface 611, the first tapered surface 731 and the second tapered surface 611 cooperate to form a first limiting structure, and the first annular step 62 is located at the second end of the first sleeve body 61.

As shown in fig. 3 to 5, the second collar 74 is provided with a third conical surface 741, the first collar 62 is provided with a fourth conical surface 621, and the third conical surface 741 and the fourth conical surface 621 cooperate to form a second limiting structure.

As shown in fig. 3 to 5, the first collar 83 is provided with a fifth tapered surface 831, the inner wall of the first end of the second sleeve 72 is provided with a sixth tapered surface 724, and the fifth tapered surface 831 and the sixth tapered surface 724 cooperate to form a third limiting structure.

As shown in fig. 3 to 5, the second collar 84 is provided with a seventh tapered surface 841, the second collar 75 is provided with an eighth tapered surface 751, and the seventh tapered surface 841 and the eighth tapered surface 751 cooperate to form a fourth limit structure.

As shown in fig. 3 to 5, in the first embodiment, the outer diameter of the first collar 73 gradually increases in a direction away from the second collar 74 to form the first tapered surface 731, and the inner diameter of the end portion of the first sleeve 61 corresponding to the first collar 73 gradually decreases in a direction closer to the first annular table 62 to form the second tapered surface 611. The outer diameter of the first collar 83 gradually increases in a direction away from the second collar 84 to form a fifth tapered surface 831, and the inner diameter of the first collar 73 gradually decreases in a direction closer to the second collar 74 corresponding to the first collar 83 to form a sixth tapered surface 724.

Of course, in embodiments not shown in the figures, the outer diameter of the first collar may gradually increase in a direction away from the second collar, and the inner diameter of the end of the first sleeve corresponding to the first collar may gradually decrease in a direction closer to the first land. Or the outer diameter of the first collar may gradually increase in a direction away from the second collar and the inner diameter of the first collar corresponding to the first collar may gradually decrease in a direction closer to the second collar.

As shown in fig. 3, a first exhaust gap 13 and a first exhaust groove are provided between the outer wall of the first collar 73 and the inner wall of the first sleeve 61. Thus, the exhaust area of the first exhaust passage 11 can be increased. And a second exhaust gap 14 and a second exhaust groove which are communicated are arranged between the outer wall of the second collar 84 and the inner wall of the second sleeve body 72. Thus, the exhaust area of the second discharge passage 12 can be increased.

As shown in fig. 3 to 5, the first exhaust groove includes a first annular groove 66 and a plurality of first straight grooves 67 that communicate with each other. The second exhaust groove includes a second annular groove 68 and a plurality of second straight grooves 69 in communication. The first annular groove 66 and the plurality of first straight grooves 67 are formed in the inner wall of the end portion of the first collar 61, and the second annular groove 68 and the plurality of second straight grooves 69 are formed in the inner wall of the first collar 73.

In addition, in the present application, the outer sleeve 60, the inner sleeve 70 and the plug shaft 80 are installed and embedded for convenient installation, and the structures of the outer sleeve 60, the inner sleeve 70 and the plug shaft 80 are processed separately for convenient processing and manufacturing.

As shown in fig. 3 to 5, the first annular groove 66 has a semicircular sectional shape in order to increase the exhaust efficiency of the first discharge passage 11. Specifically, a first annular groove 66 and a first straight groove 67 are provided on the second tapered surface 611, the first annular groove 66 extends in the circumferential direction, one end of the first straight groove 67 communicates with the first annular groove 66, and the other end of the first straight groove 67 extends in a straight line to the end of the second tapered surface 611. In order to increase the exhaust efficiency of the second exhaust passage 12, the cross-sectional shape of the second annular groove 68 is semicircular, the second annular groove 68 and the second straight groove 69 are both disposed on the sixth tapered surface 724, the second annular groove 68 extends in the circumferential direction, one end of the second straight groove 69 communicates with the second annular groove 68, and the other end of the second straight groove 69 extends to the end of the sixth tapered surface 724 in a straight line.

Of course, in the embodiment not shown in the drawings, the first annular groove and the plurality of first straight grooves may be formed on the first tapered surface, and the second annular groove and the plurality of second straight grooves may be formed on the fifth tapered surface.

In the second embodiment of the exhaust apparatus of the present application, as shown in fig. 6, the difference from the first embodiment of the exhaust apparatus is that the exhaust apparatus further includes a first spring 91 and a manner of mounting the inner sleeve 70. In the second embodiment, the inner sleeve 70 is movably disposed through the outer sleeve 60. The first discharge passage 11 is switched between a normally open state and a closed state, the stopper shaft 80 is fixedly installed in the inner sleeve 70, and the second discharge passage 12 is in a normally open state. In this way, when the exhaust device is opened, the exhaust area of the exhaust device can be increased by the first exhaust passage 11 and the second exhaust passage 12, and the exhaust efficiency can be improved. Meanwhile, compared with the first embodiment, the inner sleeve 70 is movably arranged in the outer sleeve 60 in a penetrating manner, and the inner sleeve 70 forms a stroke, so that the exhaust area of the exhaust device is further increased, and the exhaust efficiency is improved. The plug shaft 80 has only one stroke relative to the outer sleeve 60, and compared with the condition that the head of the inner side valve rod component in the related art can extend out of a forming surface and reach two strokes, the stroke of the inner sleeve 70 is reduced, the problem that the stroke precision is poor and is difficult to control is solved, meanwhile, the centering precision of the inner sleeve 70 is ensured, the centering performance of the outer sleeve 60 and the plug shaft 80 can also be ensured, the centering error is reduced, the centering performance of the exhaust device is good, and further, glue is prevented from entering through the first discharge channel 11 and the second discharge channel 12. Thereby leading the exhaust device not to be easy to feed the sizing material in the vulcanization process. As shown in fig. 6, the exhaust device further includes a first spring 91, and the first spring 91 is sleeved outside the inner sleeve 70. The outer sleeve 60 has a first end and a second end and the inner sleeve 70 has a first end and a second end. The first springs 91 are respectively abutted between the first ends of the inner sleeve 70 and the second ends of the outer sleeve 60, and the inner sleeve 70 can overcome the elastic force of the first springs 91 under the action of external force, so that the inner sleeve 70 axially moves relative to the outer sleeve 60 to close the first discharge passage 11. The first spring 91 applies an elastic force to the inner sleeve 70 in a state where the exhaust means is opened, so that the inner sleeve 70 is protruded out of the molding surface. Since the plug shaft 80 is fixedly installed in the inner sleeve 70, when the inner sleeve 70 extends out of the end surface of the first end of the outer sleeve 60, the inner sleeve 70 extends out of the end surface of the first end of the outer sleeve 60 along with the plug shaft 80. At this time, the end surface of the stopper shaft 80 is always flush with the end surface of the inner sleeve 70. The inner sleeve 70 is applied with an external force when the exhaust device is closed by an external force applied to the exhaust device by the tire inside the tire vulcanization mold.

As shown in fig. 6, the inner sleeve 70 includes a second sleeve body 72, and the second sleeve body 72 includes a first sleeve section 721 and a second sleeve section 722 having an outer diameter smaller than the first sleeve section 721. The first spring 91 is sleeved outside the second casing section 722, and a first step surface 723 is formed between the first casing section 721 and the second casing section 722. The first spring 91 abuts between the first step surface 723 and the second end of the outer sleeve 60, respectively. Thus, the first step surface 723 is provided to cooperate with the second end of the outer sleeve 60 to restrain both ends of the first spring 91.

As shown in fig. 6, in particular, the first spring 91 is sleeved outside the second sleeve body 72, and the first spring 91 is abutted between the first collar 73 and the first annular table 62. Thus, the first spring 91 can provide an elastic force for enlarging the first discharge passage 11. Meanwhile, the first collar 73 extends out of the first end of the first sleeve body 61, a first distance is reserved between the end surface of the first collar 73 and the end surface of the first end of the first sleeve body 61, and when the first collar 73 extends out of the first end of the first sleeve body 61, the end surface of the first end of the first collar 83 is flush with the end surface of the first collar 73, so that the inner sleeve 70 has only one stroke, and the phenomenon that the stroke of the inner sleeve 70 is too large is avoided.

As shown in fig. 6, in particular, the second jacket body 72 includes a first jacket segment 721 and a second jacket segment 722 having an outer diameter dimension smaller than that of the first jacket segment 721. The first spring 91 is sleeved outside the second sleeve section 722, a first step surface 723 is formed between the first sleeve section 721 and the second sleeve section 722, and the first spring 91 abuts between the first step surface 723 and the first annular table 62 respectively. Thus, the first step surface 723 is provided to cooperate with the first land 62 to restrain both ends of the first spring 91.

As shown in fig. 6, a second exhaust gap 14 and a second exhaust groove are formed between the outer wall of the second collar 84 and the inner wall of the second sleeve 72. Specifically, the second annular groove 68 and the second straight groove 69 are both disposed on the sixth tapered surface 724 of the first collar 73, wherein the cross-sectional shape of the second annular groove 68 is semicircular, the second annular groove 68 extends in the circumferential direction, one end of the second straight groove 69 communicates with the second annular groove 68, and the other end of the second straight groove 69 extends to the end of the sixth tapered surface 724 in a straight line. Thus, the exhaust area of the second discharge passage 12 can be increased. Of course, in the embodiment not shown in the drawings, the second annular groove and the second straight groove may be opened on the fifth tapered surface.

In the third embodiment of the exhaust apparatus of the present application, as shown in fig. 7 to 9, the difference from the first embodiment of the exhaust apparatus is that the exhaust apparatus further includes a second spring 92 and a mounting manner of the plug shaft 80. In the third embodiment, the plug shaft 80 is movably disposed through the inner sleeve 70. The second discharge passage 12 is switched between a normally open state and a closed state, the inner sleeve 70 is fixedly installed in the outer sleeve 60, and the first discharge passage 11 is in a normally open state. Meanwhile, compared with the first embodiment, the plug shaft 80 is movably arranged in the inner sleeve 70 in a penetrating manner, and the plug shaft 80 forms a stroke, so that the exhaust area of the exhaust device is further increased, and the exhaust efficiency is improved. The plug shaft 80 only forms one stroke relative to the outer sleeve 60, and compared with the situation that the head of an inner side valve rod component in the related art can extend out of a forming surface and reach two strokes, the stroke of the plug shaft 80 is reduced, the problem that the stroke precision is poor and is difficult to control is solved, meanwhile, the centering precision of the plug shaft 80 is guaranteed, the centering performance of the outer sleeve 60 and the inner sleeve 70 can also be guaranteed, the centering error is reduced, the centering performance of the exhaust device is good, and further, glue is prevented from entering through the first discharge channel 11 and the second discharge channel 12. Thereby leading the exhaust device not to be easy to feed the sizing material in the vulcanization process. As shown in fig. 7 to 9, the exhaust device further includes a second spring 92, and the second spring 92 is sleeved on the plug shaft 80. The plug shaft 80 has a first end and a second end and the inner sleeve 70 has a first end and a second end. The second springs 92 are respectively abutted between the first ends of the plug shafts 80 and the second ends of the inner sleeves 70, and the plug shafts 80 can overcome the elastic force of the second springs 92 under the action of external force, so that the plug shafts 80 axially move relative to the inner sleeves 70 to close the second discharge passages 12. The second spring 92 applies an elastic force to the plug shaft 80 so that the plug shaft 80 protrudes beyond the end surface of the first collar 73 in a state where the exhaust device is opened. The plug shaft 80 is under the action of an external force when the exhaust device is closed by the external force applied to the exhaust device by the tire inside the tire vulcanization mold.

As shown in fig. 7 to 9, the plug shaft 80 includes a shaft body 82, the shaft body 82 includes a first shaft segment 821 and a second shaft segment 822 having a smaller diameter than the first shaft segment 821, the second spring 92 is sleeved outside the second shaft segment 822, a second step surface 823 is formed between the first shaft segment 821 and the second shaft segment 822, and the second spring 92 abuts between the second step surface 823 and the second end of the inner sleeve 70. Thus, the second stepped surface 823 is provided to facilitate engagement with the second end of the inner sleeve 70 to restrain both ends of the second spring 92.

As shown in fig. 7 to 9, specifically, the second springs 92 are sleeved outside the shaft body 82, and the second springs 92 are respectively abutted between the first collar 83 and the second collar 75. Thus, the second spring 92 can provide an elastic force for increasing the discharge area of the second discharge passage 12. Meanwhile, the first collar 83 extends out of the first collar 73, a first distance is reserved between the end face of the first collar 83 and the end face of the first collar 73, when the first collar 83 extends out of the first collar 73, the end face of the first collar 73 is flush with the end face of the first end of the first sleeve 61, so that the plug shaft 80 has only one stroke, and the over-large stroke of the plug shaft 80 is avoided.

As shown in fig. 7 to 9, in particular, the shaft body 82 includes a first shaft segment 821 and a second shaft segment 822 having a smaller diameter dimension than the first shaft segment 821. The second spring 92 is sleeved outside the second shaft segment 822, and a second step surface 823 is formed between the first shaft segment 821 and the second shaft segment 822. The second springs 92 abut between the second step surfaces 823 and the second lands 75, respectively. Thus, the second step surface 823 is provided to facilitate engagement with the second land 75 to restrain both ends of the second spring 92.

As shown in fig. 7 and 9, in particular, the second end of the shaft body 82 is a frustum 824. Thus, the frustum 824 can reduce wind resistance and facilitate gas circulation.

As shown in fig. 7 and 8, a first exhaust slit 13 and a first exhaust groove are provided between the outer wall of the first collar 73 and the inner wall of the first sleeve 61. Specifically, the first annular groove 66 has a semicircular cross-sectional shape, the first annular groove 66 and the first straight groove 67 are both provided on the second tapered surface 611, the first annular groove 66 extends in the circumferential direction, one end of the first straight groove 67 communicates with the first annular groove 66, and the other end of the first straight groove 67 extends to the end of the second tapered surface 611 along a straight line. Thus, the exhaust area of the first exhaust passage 11 can be increased. Of course, in an embodiment not shown, the first annular groove and the first straight groove may also be provided on the first conical surface.

It should be noted that, in an embodiment not shown, the outer sleeve and the inner sleeve may be limited, and the inner sleeve and the plug shaft may be limited by other structures, such as a slot with an opening at the second end of the inner sleeve and the second end of the plug shaft, or a screw connection, and the like, and the structure is not limited to the structures in the first to third embodiments.

The present application further provides a tire vulcanization mould, in this embodiment, the tire vulcanization mould includes: the air exhaust device comprises a molding surface and an air exhaust device, wherein the molding surface is provided with an open vent hole. The exhaust device is arranged in the ventilation hole in a penetrating mode and is the exhaust device. Because the exhaust device can solve the problems that the stroke of the inner valve rod part is too large, the stroke precision of the inner valve rod part is poor, the superposition is difficult to control and the coaxiality of the inner valve rod part, the outer valve rod part and the valve seat is poor in the related technology, the problem that the rubber material is easy to enter the exhaust device is solved, and the same technical problem can be solved by the tire vulcanization mold with the exhaust device.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. An exhaust apparatus, comprising:

an outer cover (60);

the inner sleeve (70) penetrates through the outer sleeve (60), the inner sleeve (70) is in limit fit with the outer sleeve (60), and a first discharge channel (11) is formed between the inner sleeve (70) and the outer sleeve (60);

the plug shaft (80) penetrates through the inner sleeve (70), the plug shaft (80) is in limit fit with the inner sleeve (70), and a second discharge channel (12) is formed between the plug shaft (80) and the inner sleeve (70);

wherein the inner sleeve (70) is fixedly arranged in the outer sleeve (60), and the first discharge channel (11) is in a normally open state; and/or the plug shaft (80) is fixed in the inner sleeve (70), and the second discharge channel (12) is in a normally open state.

2. The exhaust apparatus according to claim 1, wherein the inner sleeve (70) is movably disposed through the outer sleeve (60), the first exhaust passage (11) is switched between a normally open state and a closed state, the plug shaft (80) is fixedly installed in the inner sleeve (70), and the second exhaust passage (12) is in a normally open state.

3. The exhaust apparatus according to claim 2, further comprising a first spring (91), wherein the first spring (91) is disposed outside the inner sleeve (70), the outer sleeve (60) has a first end and a second end, the inner sleeve (70) has a first end and a second end, the first spring (91) abuts between the first end of the inner sleeve (70) and the second end of the outer sleeve (60), and the inner sleeve (70) can overcome the elastic force of the first spring (91) under the external force to axially move the inner sleeve (70) relative to the outer sleeve (60) to close the first exhaust passage (11).

4. The exhaust apparatus according to claim 3, wherein the outer jacket (60) comprises a first jacket body (61), the inner jacket (70) comprises a second jacket body (72), the second jacket body (72) comprises a first jacket section (721) and a second jacket section (722) having an outer diameter smaller than that of the first jacket section (721), the first spring (91) is sleeved outside the second jacket section (722), a first step surface (723) is formed between the first jacket section (721) and the second jacket section (722), and the first spring (91) abuts between the first step surface (723) and the second end of the outer jacket (60), respectively.

5. The exhaust apparatus according to claim 1, wherein the plug shaft (80) is movably disposed through the inner sleeve (70), the second exhaust passage (12) is switched between a normally open state and a closed state, the inner sleeve (70) is fixedly mounted in the outer sleeve (60), and the first exhaust passage (11) is in the normally open state.

6. The venting device according to claim 5, further comprising a second spring (92), wherein the second spring (92) is sleeved outside the plug shaft (80), the plug shaft (80) has a first end and a second end, the inner sleeve (70) has a first end and a second end, the second spring (92) is respectively abutted between the first end of the plug shaft (80) and the second end of the inner sleeve (70), and the plug shaft (80) can overcome the elastic force of the second spring (92) under the action of an external force so as to axially move the plug shaft (80) relative to the inner sleeve (70) and further close the second vent passage (12).

7. The exhaust apparatus according to claim 6, wherein the plug shaft (80) comprises a shaft body (82), the shaft body (82) comprises a first shaft section (821) and a second shaft section (822) with a smaller diameter than the first shaft section (821), the second spring (92) is sleeved outside the second shaft section (822), a second step surface (823) is formed between the first shaft section (821) and the second shaft section (822), and the second spring (92) abuts between the second step surface (823) and the second end of the inner sleeve (70).

8. An exhaust apparatus according to claim 1 or 2 or 3 or 5 or 6,

the outer sleeve (60) comprises a first sleeve body (61) and a first annular table (62) arranged on the inner wall of the first sleeve body (61);

the inner sleeve (70) comprises a second sleeve body (72), and a first sleeve ring (73) and a second sleeve ring (74) which are arranged on the outer wall of the second sleeve body (72) at intervals, the first sleeve ring (73) is positioned at the first end of the second sleeve body (72), and the inner sleeve (70) further comprises a second annular table (75) arranged on the inner wall of the second end of the second sleeve body (72);

the plug shaft (80) comprises a shaft body (82) and a first collar (83) and a second collar (84) which are arranged on the shaft body (82) at intervals, wherein the first collar (83) is positioned at the end part of the shaft body (82);

the first lantern ring (73) is in limit fit with the inner wall of the end part of the first sleeve body (61), and the second lantern ring (74) is in limit fit with the first annular table (62);

the first collar (83) is in limit fit with the inner wall of the first end of the second sleeve body (72), the second collar (84) is positioned at one end, away from the first end of the second sleeve body (72), of the second collar table (75), and the second collar (84) is in limit fit with the second collar table (75);

wherein, the inner sleeve (70) is provided with a first through hole (71) penetrating through the inner sleeve and the outer sleeve, and part of the first through hole (71) penetrates through the second lantern ring (74); and/or a second through hole (81) penetrating through the plug shaft (80) is formed in the plug shaft, and part of the second through hole (81) penetrates through the second collar (84).

9. An exhaust apparatus according to claim 1 or 2 or 3 or 5 or 6,

the outer sleeve (60) comprises a first sleeve body (61) and a first annular table (62) arranged on the inner wall of the first sleeve body (61);

the inner sleeve (70) comprises a second sleeve body (72) and a first sleeve ring (73) and a second sleeve ring (74) which are arranged on the outer wall of the second sleeve body (72) at intervals;

the plug shaft (80) comprises a shaft body (82) and a first collar (83) and a second collar (84) which are arranged on the shaft body (82) at intervals;

wherein the outer diameter of the first collar (73) is gradually increased in a direction away from the second collar (74), and the inner diameter of the end of the first sleeve body (61) corresponding to the first collar (73) is gradually decreased in a direction close to the first annular table (62); and/or the outer diameter of the first collar (83) is gradually increased in a direction away from the second collar (84), and the inner diameter of the first collar (73) is gradually reduced in a direction close to the second collar (74) corresponding to the first collar (83).

10. The exhaust apparatus of claim 9,

a first exhaust gap (13) and a first exhaust groove which are communicated are formed between the outer wall of the first lantern ring (73) and the inner wall of the first sleeve body (61);

and/or a second exhaust gap (14) and a second exhaust groove which are communicated are arranged between the outer wall of the second shaft ring (84) and the inner wall of the second sleeve body (72).

11. A tire curing mold, comprising:

a molding surface having an open vent hole;

an exhaust device inserted into the ventilation hole, wherein the exhaust device is the exhaust device of any one of claims 1 to 10.

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