KR100887284B1 - Vent device of vulcanization mold - Google Patents

Abstract

A vent device of a vulcanization mold is provided to prevent malfunction and maintain the performance of a vent device optimally by preventing the contacting a spring with rubber poured into the penetration hole during vulcanizing. A vent device of a vulcanization mold comprises a casing(2) inserted into a vent hole(11) of a vulcanizing mold(1), a valve body(3) inserted into the center penetration of the casing, a spring(4) flexibly installed at the valve body, and a stopper(5) controlling the moving distance of the valve body, fastened to the lower part of the valve body. A rubber fitting preventing sill(6) is installed to the lower end part of the valve body. A rubber storage groove(61) is installed on the outer circumference of the rubber fitting preventing sill.

Description

Vent device of tire vulcanization mold {Vent device of vulcanization mold}

The present invention relates to a venting device of a tire vulcanization mold, and more particularly, to improve the venting device installed on the tire vulcanization mold, to prevent rubber from contacting the spring of the venting device during vulcanization, thereby extending the service life of the venting device. The present invention relates to a tire vulcanization mold venting device, which is capable of improving air discharge capacity and preventing malfunctions during vulcanization.

In general, green tires produced in the state of raw rubber are vulcanized in a high temperature and high pressure vulcanization mold to produce a finished tire. In this case, the vulcanization mold for vulcanizing the green tire is composed of a mold for pressing the mold portion and the green tire to the mold, and the inner surface of the mold can discharge air existing between the green tire and the mold to the outside of the mold. Vent holes are installed and configured.

When the tire is vulcanized, a large pressure is applied to the inside of the vulcanization mold, and thus rubber may be pushed into the vent hole. When the rubber comes in contact with the spring of the vent device, the spring is damaged and the performance of the vent device is greatly degraded.

In order to solve this problem, the present application is a casing 102 is inserted into the vent hole 110 of the mold 101, and the casing 102, as shown in FIG. The valve body 103 inserted into the central through hole 120 of the valve body, the spring 104 elastically installed on the valve body 103, and the moving distance of the valve body 103 are fastened to the lower portion of the valve body 103. In the configuration of the stopper 105 for controlling the prevention, the prevention jaw preventing the rubber introduced into the inside of the through hole at the periphery of the bottom surface of the valve head 131 constituting the valve body 103 ( 106) has been described a technique characterized in that formed. That is, the above technique is designed to prevent the rubber flowing into the vent device 100 from being caught in the spring by processing the circumferential jaw 106 on the bottom surface of the valve head 131 of the valve body 103.

However, in the above technique, when the amount of rubber introduced into the outer circumferential surface of the valve body becomes large, the stopper 106 alone causes the rubber to flow downward through the malfunction of the rubber contact with the casing and the outer circumferential surface of the valve body. We have found that there is not enough problem to solve the problem with the spring.

Thus, the present invention is characterized in that the rubber storage groove is installed on the outer periphery of the rubber jam prevention jaw, to prevent the contact of the rubber and the spring introduced into the through-hole during vulcanization by storing the excess rubber is introduced.

According to the present invention, by forming a rubber storage groove on the outer periphery of the rubber jamming jaw of the valve body to store the excess rubber to be introduced to prevent maximum contact between the rubber and the spring flowing into the through hole during the vulcanization, to prevent malfunction It is effective in maintaining the performance of the vent device in an optimal state and improving durability.

According to the present invention, a casing (2) inserted into the vent hole (11) of the vulcanizing mold (1) and a valve body (3) and a valve body (3) inserted into the central hole of the casing (2) are elastic. It is composed of a spring (4) to be installed and a stopper (5) which is fastened to the lower part of the valve body (3) and controls the moving distance of the valve body. The rubber storage groove 61 is installed on the outer circumference of the rubber jam prevention jaw 6.

The vertical cross-sectional shape of the rubber storage groove 61 formed in the rubber jam prevention jaw 6 is rectangular (Fig. 3 (A)), trapezoid (Fig. 3 (B), semicircle or half) as shown in FIG. An elliptic shape (Fig. 3 (C)) can be taken.

The rubber storage groove 61 suppresses the contact between the spring and the rubber introduced into the through-hole during vulcanization by storing the excess rubber introduced by forming a rubber storage groove on the outer circumferential edge of the rubber jamming jaw of the valve body.
Originally, the amount of rubber inflow leading to the inner spring through the valve seat through the periphery of the valve body is not large. If such a large amount of rubber is because the operation of the valve is impossible. Thus, the life of the valve can be extended if even some of the incoming rubber can be treated. Thus, the present invention forms a rubber storage groove consisting of two circumferential grooves, thereby allowing the two circumferential grooves to extend the working sound time of the valve body by the time that the rubber is stored in the circumferential groove. In addition, the present invention further goes to this, when the rubber is stored in the rubber storage groove is a peripheral groove, the rubber frame sandwiched in the rubber storage groove is a peripheral groove eventually performs a function of packing to perform a function to limit the additional rubber inflow do. This additional restriction of the rubber in turn prevents the rubber from sticking to the spring and further extends the time taken for the spring to fail, which in turn has the effect of extending the life of the vent device.

1 is a cross-sectional view taken from a conventional venting device.

Figure 2 is a cross-sectional view of the vent device of the present invention.

Figure 3 is an excerpt sectional view showing the cross-sectional shape of the rubber storage groove of the vent device of the present invention.

<Explanation of symbols for the main parts of the drawings>

1. Vulcanization mold

11.Benthole

2. Casing

3. Valve body

4. Spring

5. Stopper

6. Gum bumps

61. Rubber storage groove

Claims (4)

Casing is inserted into the vent hole of the vulcanization mold, the valve body is inserted into the central hole of the casing, the spring is elastically installed in the valve body, and the stopper is fastened to the lower portion of the valve body to control the movement distance of the valve body The tire vulcanization mold vent device, characterized in that the rubber pinch prevention jaw is provided in the outer peripheral lower end of the valve body, the rubber storage groove is installed on the outer periphery of the rubber pinch prevention jaw. The tire vulcanization mold vent device according to claim 1, wherein the vertical cross-sectional shape of the rubber storage groove formed in the rubber jam prevention jaw is rectangular. The venting device of a tire vulcanization mold according to claim 1, wherein the vertical cross-sectional shape of the rubber storage groove formed in the rubber jam prevention jaw is trapezoidal. The venting device of a tire vulcanization mold according to claim 1, wherein the vertical cross-sectional shape of the rubber storage groove formed in the rubber jam prevention jaw is semi-circular.

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