KR100855209B1 - Vent device of vulcanization mold - Google Patents

Abstract

A vent apparatus for a tire vulcanization mold is provided to prevent vent rubber from being formed in a completed tire due to rubber introduced into a vent apparatus, and to prevent an abnormal operation during a vulcanization process. A vent apparatus for a tire vulcanization mold comprises a casing(2) and a valve member(1). The casing is inserted into a vent hole of a vulcanization mold. The valve member is inserted into a central through hole of the casing. The casing is formed with grooves(21) at both sidewalls thereof. A leaf spring(31) is inserted into the grooves. The valve member is installed in a central groove(32) of the leaf spring by passing therethrough. The leaf spring has a longitudinal section shaped like W. The valve member includes a fixing groove(13) for fixing a coupling position of the leaf spring and an insertion protrusion(14) for preventing separation of the leaf spring.

Description

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

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of a valve body of a vent device of the present invention in a tire vulcanization mold.

Fig. 2 is a sectional view of the casing of the vent device of the present invention, where (a) is a cross sectional view of the groove 21 and (b) is a front center longitudinal sectional view.

3 is a plan view and a longitudinal sectional view of the leaf spring of the vent device of the present invention.

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

1. Valve body

11. Valve head

12. Load transfer part

13. Fixing groove

14. Forced Jaw

2. Casing

21. Home

3. Leaf spring

31. End

32. Center groove

33. Shredding groove

The present invention relates to a vent device of a tire vulcanization mold, and more particularly, to improve the venting device installed on the tire vulcanization mold to improve the air discharge capacity, and the rubber is introduced into the vent device to form a vent rubber in the finished tire. The present invention relates to a tire vulcanization mold venting device that suppresses the operation, prevents malfunction during vulcanization, prolongs the service life of the venting device, and facilitates maintenance.

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.

As a device designed so that the vent rubber is not generated by the prior art, a vent device in which the head portion of the vent hole and the straight leaf spring are integrally designed has been introduced. This has the advantage that the vent rubber is not generated, but due to the nature of the vent device is installed in a small part is limited to the vertical movement of the vent head, there is a difficulty in fixing and repairing the vent. In addition, due to the characteristics of the vent device, there is a great difficulty in the production of the spring portion is integrally formed with the small head portion.

In addition, a number of techniques for applying a coil spring to a vent device as described in Patent Registration Nos. 10-0579508, 10-0498023, and 10-0509188 have been introduced. However, many components are required to fix the coil springs, and the manufacturing process is complicated and the manufacturing cost is disadvantageous.

Accordingly, the present invention simplifies the structure by applying a "W" type leaf spring to the valve body to greatly reduce the risk of failure and damage to extend the durability life of the venting device, to prevent operation failure during vulcanization, to discharge air It is an object of the present invention to improve the capability, to prevent the inflow of rubber into the vent device to form a vent rubber in the finished tire, and to provide a vent device that is easy to maintain and manufacture.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention comprises a casing (2) inserted into a vent hole of a vulcanization mold (not shown) and a valve body (1) inserted into a central through hole of the casing (2). The groove 21 is formed in, the leaf spring is inserted into the groove 21, the valve body 1 is characterized in that is installed through the central groove 32 of the leaf spring.

Preferably, the leaf spring has a longitudinal cross-section "W". "W" shaped leaf spring (3) is the spring spring is extended as the end 31 of the leaf spring is pushed into the groove 21 of the casing (2) during load transfer, the valve body according to the width of the groove 21 Limits the range of movement, and serves to restore the valve body (1) to its original position by the elasticity of the spring.

The valve body 1 preferably includes a fixing groove 13 for fixing a position where the leaf spring 3 is coupled, and an interference fitting jaw 14 for preventing engagement and detachment of the leaf spring 3. Do. The inclined surface 141 of the interference fitting jaw 14 makes it easy to insert into the central groove 32 of the leaf spring 3 inserted into the groove 21 of the casing 2.

In addition, the present invention, as shown in Figure 3, the leaf spring 3 is preferably formed in the groove grooves 33 on both sides of the leaf spring (3) around the center groove (32). The shredding groove 33 is for the case where a replacement is necessary for the repair / repair of the valve body. When the valve body is required to be replaced, a large load is applied to the valve body head 11 so that the breakage groove 33 is stressed. The valve body can be easily removed because it is concentrated and the leaf spring is easily broken. After that, the new "W" type leaf spring and a new valve body can be inserted and replaced.

As described above, according to the present invention, by applying a "W" type leaf spring, the structure is simplified to extend the durability life of the vent device, improve the air discharge capacity, the rubber is introduced into the vent device to the finished tire It suppresses the formation of the vent rubber, prevents malfunction during vulcanization, and has the advantage of easy maintenance and manufacturing.

Claims (4)

In a casing inserted into a vent hole of a vulcanization mold and a valve body inserted into a central hole of the casing, grooves 21 are formed on both sidewalls of the casing, and a leaf spring is formed in the groove 21. Inserted, the valve of the tire vulcanization mold, characterized in that the valve body is installed through the central groove (32) of the leaf spring. The venting device of a tire vulcanization mold according to claim 1, wherein the leaf spring has a longitudinal cross-section of "W". 2. The vent device of claim 1, wherein the valve body includes a fixing groove for fixing a position at which the leaf spring is coupled, and an interference fit jaw for preventing engagement and detachment of the leaf spring. According to any one of claims 1 to 3, The leaf spring is a tire vulcanization mold vent device, characterized in that the shackle grooves 33 are formed on both sides of the leaf spring around the center groove (32).

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