CN209175976U - C-shaped air sleeve for tire vulcanization mold - Google Patents

Abstract

The utility model relates to a C-shaped air sleeve for a tire vulcanization mold, which is closely matched with the bottom hole on the tire vulcanization mold. A vent hole with a mesh number of 100-500 is provided on the part, and the vent hole communicates with the mold cavity; the fastening part is closely matched with the aforementioned bottom hole, and an air outlet is provided inside, and the air outlet communicates with the outside world ; The exhaust hole communicates with the air outlet to discharge the gas in the mold cavity. The utility model simplifies the air jacket structure and improves the production efficiency.

Description

C-shaped air sleeve for tire vulcanization mold

technical field

The utility model relates to the technical field of tire vulcanization molds, in particular to a C-shaped air sleeve for tire vulcanization molds.

Background technique

To form a molded tire from the green tire manufactured in the state of raw rubber, it needs to be vulcanized at high temperature and high pressure by a vulcanizer. The vulcanizing machine usually includes a mold with a cavity, and a bladder is arranged in the center of the cavity of the mold. When in use, an external tire loading and unloading device is used to center the green tire on the bladder to achieve its heating and pressing effect. Since the green tire is placed in the mold cavity, there is initially a gap between the outer wall of the green tire and the wall of the mold cavity. After the green tire is heated and expanded, how to remove the air in the gap without affecting the molding effect of the green tire, so as to ensure the smooth expansion of the green tire to the wall of the cavity for final molding becomes a problem.

The structure of the spring air sleeve in the prior art usually includes a sleeve-shaped valve housing as the outer shell, and a columnar mandrel is coaxially sleeved in the valve housing, and a spring is sleeved on the mandrel. The bottom of the mandrel and one end of the valve casing form a one-way gear fit, and the top end of the mandrel and the other end of the valve housing have a sealing mating surface that can form a one-way gear fit. The limit of the above two one-way gear fits The directions are arranged opposite to each other. In actual application, use the through mold opened on the mold to connect the cavity and the exhaust hole of the external exhaust equipment, insert the spring air sleeve into the exhaust hole with interference, and make the end of the sealing mating surface of the valve housing and the mold The cavity wall is set flush. During the vulcanization process, the green tire is heated and expanded, and the gap between the green tire and the cavity wall of the mold is gradually reduced. Due to the action of the spring, the sealing mating surface of the mandrel and the valve casing is in an open state, so the air in the above-mentioned gap overflows along the gap of the aforementioned sealing mating surface, and is removed by the external exhaust device. Until the tire is completely vulcanized, there is no gap between the tire and the cavity wall of the mold. At this time, the sealing mating surface of the mandrel and the valve housing is squeezed by the tire, so that the above sealing mating surface is completely fitted and sealed. After the tire is vulcanized and taken out, under the action of elasticity, the mandrel is reset, and a new round of vulcanization operation can be prepared.

When the above-mentioned spring air sleeve is used in practice, the existing problems are as follows: First, as a pneumatic part, the inner spring of the spring air sleeve is often stuck and damaged due to factors such as rubber penetration or elastic fatigue. Vent holes, that is, the number of installations of spring air sleeves is very large, which leads to a very high cost of replacing them one by one, and the maintenance and installation are also extremely cumbersome. Secondly, because the vulcanization process is bound to be accompanied by high temperature, as a metal spring, it is prone to elastic failure after being affected by high temperature, resulting in a sharp decrease in the service life of the spring, which has an adverse effect on the actual use effect of the spring air sleeve.

Therefore, how to simplify the structure of the air jacket, reduce the frequency of maintenance and replacement of the air jacket, and improve production efficiency are technical problems to be solved urgently in this field in recent years.

Utility model content

Aiming at the complement existing in the prior art, the utility model provides a C-shaped air sleeve for a tire vulcanization mold, which has a simple structure, is convenient to use, and improves production efficiency.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A C-shaped air sleeve for a tire vulcanization mold, which is closely matched with the bottom hole on the tire vulcanization mold. A vent hole with a mesh number of 100-500, the vent hole communicates with the mold cavity; the fastening part is closely matched with the aforementioned bottom hole, and an vent hole is provided inside, and the vent hole communicates with the outside world; The air hole communicates with the air outlet to discharge the gas in the mold cavity.

The above-mentioned technical scheme can also be further improved through the following technical measures:

As a further improvement, the diameter of the vent hole is 0.03 mm, and the mesh number of the vent hole is 281 mesh.

As a further improvement, the diameter of the vent hole is 0.03 mm, and the mesh number of the vent hole is 342 mesh.

As a further improvement, the diameter of the vent hole is 0.03 mm, and the mesh number of the vent hole is 191 mesh.

As a further improvement, the diameter of the vent hole is 0.05 mm, and the mesh number of the vent hole is 124 mesh.

As a further improvement, the lower part of the fastening part is provided with a tapered guide part whose diameter gradually decreases. The taper of the guide part is 4°.

Due to the adoption of the above technical scheme, the utility model has the following technical effects:

The air sleeve of the utility model has no elastic structure, so the problems that the spring air sleeve is easily stuck by overflowing glue and fatigue failure are effectively avoided, the maintenance frequency is greatly reduced, and the production efficiency is significantly improved. Moreover, the air jacket of the utility model is simple in structure and low in cost, and can be pressed into the bottom hole during use, which is very convenient.

Description of drawings

Fig. 1 is a sectional view of the utility model.

Fig. 2 is a distribution diagram of exhaust holes in Embodiment 1.

Fig. 3 is a distribution diagram of exhaust holes in the second embodiment.

Fig. 4 is a distribution diagram of exhaust holes in the third embodiment.

Fig. 5 is a distribution diagram of exhaust holes in the fourth embodiment.

Description of reference numbers:

1. Exhaust part; 11. Vent hole; 2. Fastening part; 21. Vent hole; 3. Guide part.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Some embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the features in the following embodiments can be combined with each other.

Example 1:

As shown in Figure 1 and Figure 2, a C-shaped air sleeve for a tire vulcanization mold in this embodiment is closely matched with the bottom hole on the tire vulcanization mold. part 1 and fastening part 2; the vent part 1 is provided with a vent hole 11 with a mesh number of 281 and an aperture of 0.03mm, and the vent hole 11 communicates with the mold cavity; the fastening part 2 is connected with the aforementioned The bottom hole is tightly matched, and an air outlet 21 is arranged inside, and the air outlet 21 communicates with the outside world; the air outlet 11 communicates with the air outlet 21 to discharge the gas in the mold cavity.

The lower part of the fastening part 2 is provided with a tapered guide part 3 whose diameter gradually decreases. The taper of the guide part 3 is 4°. The length of the guide part 3 is 1 time of the diameter of the fastening part 2, and a 4° taper guide angle is designed. The length of the fastening part 2 is 1 time of its diameter, and the diameter is 0.005mm larger than the bottom hole on the mold. The length of the hole 11 is 0.4 mm. The diameter of the fastening part 2 is 3 mm, and the diameter of the air outlet 21 is 2.2 mm.

After the axial machining of the bottom hole of the mold body is completed, the hole is reamed and reamed with a reamer until the outer diameter of the fastening part 2 of the air sleeve is 0.005mm smaller, so that the fastening part 2 and the bottom hole can be tightly matched. When assembling, directly insert the air sleeve into the air hole by hand, and it is flush with the outer arc surface of the mold cavity.

During the tire vulcanization process, the gas is discharged from the mold cavity to the outside of the mold through the vent hole 11 and the vent hole 21. 1, the exhaust holes 11 are concentrically distributed.

Implementation two:

As shown in FIG. 1 and FIG. 3 , in this embodiment, the basic structure is the same as that of Embodiment 1, except that the number and distribution of the exhaust holes 11 are different.

In this embodiment, the number of vent holes 11 is 342 meshes, the diameter of the vent holes 11 is 0.03mm, and the vent holes 11 are distributed in such a way that the outer circumference forms a circle, the inner circumference forms a concentric circle, and two circles The exhaust holes 11 between them are radially distributed along the radial direction.

Implementation three:

As shown in FIG. 1 and FIG. 4 , in this embodiment, the basic structure is the same as that of Embodiment 1, except that the number and distribution of the exhaust holes 11 are different.

In this embodiment, the number of vent holes 11 is 191 meshes, the diameter of the vent holes 11 is 0.03mm, and the vent holes 11 are distributed in such a way that a five-pointed star is formed inside, and other vent holes 11 fill the outside of the five-pointed star space and form a circle.

Implementation four:

As shown in FIG. 1 and FIG. 5 , in this embodiment, the basic structure is the same as that of Embodiment 1, except that the number and diameter of the exhaust holes 11 are different. In this embodiment, the number of vent holes 11 is 124 meshes, and the diameter of the vent holes 11 is 0.05 mm.

In the present utility model, the diameter of the vent hole 11 should meet the characteristics of venting without glue removal, so its diameter is between 0.025 and 0.06 mm, and the mesh number of the vent hole 11 is 100 to 500.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although terms such as 1. exhaust portion; 11. exhaust hole; 2. fastening portion; 21. air outlet; 3. guide portion are frequently used in this paper, the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (7)

1. A C-shaped air sleeve for a tire vulcanization mold, which is tightly matched with the bottom hole on the tire vulcanization mold, is characterized in that, the air sleeve is round rod-shaped as a whole, and it includes an exhaust portion and a fastening portion; The exhaust part is provided with a vent hole with a mesh number of 100-500, and the vent hole communicates with the mold cavity; The outside is communicated; the exhaust hole communicates with the air outlet to discharge the gas in the mold cavity. 2. The air jacket according to claim 1, characterized in that the diameter of the vent hole is 0.03 mm, and the mesh number of the vent hole is 281 mesh. 3. The air jacket according to claim 1, characterized in that, the diameter of the vent hole is 0.03 mm, and the mesh number of the vent hole is 342 mesh. 4. The air jacket according to claim 1, characterized in that, the diameter of the vent hole is 0.03 mm, and the mesh number of the vent hole is 191 mesh. 5. The air jacket according to claim 1, characterized in that, the diameter of the vent hole is 0.05 mm, and the mesh number of the vent hole is 124 mesh. 6. The air sleeve according to claim 1, characterized in that, the lower part of the fastening part is provided with a tapered guide part whose diameter gradually decreases. 7. The air sleeve according to claim 6, wherein the taper of the guide portion is 4°.