KR19990019314U - Tire Vulcanization Mold Structure - Google Patents

Abstract

The present invention relates to a tire vulcanization mold structure, and to prevent the tire from being extracted from the gap between the mold and the mold during tire vulcanization, and to produce a tire in which the tire does not have an abnormal appearance in the shape of the vulcanization mold. By designing the vulcanization mold so that the protruding end is formed in a predetermined shape in the end portion, it is possible to prevent a poor appearance of the tire.

Description

Tire Vulcanization Mold Structure

The present invention relates to a structure of a vulcanization mold provided in a tire vulcanizer, and particularly, a protrusion is formed at an end portion at which the vulcanization molds come into contact with each other, so that the tire is in direct contact with the surface of the mold at the joint part of the mold at the start of vulcanization. The present invention relates to a tire vulcanization mold structure which prevents the phenomenon of tire extraction from the gap and prevents abnormalities in the appearance of the tire.

In general, the tire is a green tire is completed by a molding process of a combination of a variety of rubber, carbon black, sulfur and other rubber chemicals, and a combination of the semi-finished product of the rolled or extruded blended rubber is completed, this green tire Is put into the mold of the vulcanizer, and the predetermined heat and pressure are applied from the inside and the outside for a predetermined time to react the vulcanizing agent introduced in the compounding process to completely combine sulfur and rubber molecules in the tire to obtain stable intrinsic properties. It goes through the vulcanization process, which is a process of obtaining a unique tread design.

Meanwhile, as shown in FIG. 1, heat is transferred from the outside to the vulcanizer for performing the vulcanization process, and heat is transferred from the molds 1, 2, 3 and the green tire 5 to form the tire. A bradder (4; bradder) is formed to form a tire inner shape, the mold located outside the green tire (5) is composed of a tread mold (1), a side mold (2) and a bead ring (3) And, the brader (4) is inserted into the inside of the tire, and the molds are placed on top of each other to surround the green tire (5) the vulcanization process is made.

However, when the vulcanization molds face each other at the initial stage of vulcanization as described above to surround the exterior of the tire, as shown in FIG. As a result, there was a problem in that a poor appearance was formed due to the formation of a thin extraction part.In particular, when the tire is flattened and the angle of the side mold in the area where the side mold and the tread mold are in contact is in the range of 45 ° to 70 °, There was a problem that a lot of phenomena that the green tire before extraction is extracted.

Therefore, the present invention was devised to solve the above problems, and a protruding end is formed in a predetermined form at the inner end of the vulcanization mold, thereby preventing the tire from directly contacting the mold surface. It is an object of the present invention to provide a tire vulcanization mold structure that prevents abnormalities and prevents abnormalities in the appearance of tires.

1 is a cross-sectional view of a vulcanizer showing a state in which a tire is inserted into a vulcanization mold according to the present invention;

2 is an enlarged view of a portion A of FIG. 1;

3 is a cross-sectional view of a first embodiment of a vulcanization mold according to the present invention,

Figure 4 is a cutaway perspective view of a second embodiment of a vulcanization mold according to the present invention,

5 is a cutaway perspective view of a third embodiment of a vulcanization mold according to the present invention;

FIG. 6 is a cross-sectional view illustrating a state in which a tire is extracted from a conventional vulcanization mold as a corresponding diagram of FIG. 2.

1-Tread Mold 2-Side Mold

3-Bead Ring 4-Brother

5-Green Tire 6, 6 ', 6˝-Overhang

7-Bend 8-Home

21-Tip R1-Radius of first curvature

R2-Second Curvature Radius H-Height

W-separation

The present invention for achieving the above object, the protruding end is formed in the circumferential direction at the corners of the inner both ends of the tread mold or side mold of the vulcanization mold, the tire is in contact with the mold at the part where the tread mold and the side mold contact. On the other hand, it is formed within a predetermined shape and dimension range so that there is no abnormality in the appearance of the tire even after vulcanization.

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

1 is a cross-sectional view of a vulcanizer in a state in which a tire is mounted on a vulcanizing mold according to the present invention, FIG. 2 is an enlarged view of a portion A of FIG. 1, and FIG. Figure 1 is a cross-sectional view of one embodiment, Figure 4 is a second embodiment of a vulcanization mold is formed with a projecting end according to the present invention, Figure 5 is a third embodiment of the vulcanization mold is formed with a projecting end according to the present invention, the present invention As shown in Fig. 3, a protruding end 6 having a specific shape is formed at the inner end of the side mold 2 in contact with the side surface of the green tire 5, and the protruding end 6 is formed from the inside of the side mold. Ascending with a gentle curve and descending sharply at the apex and having a first radius of curvature R1, the outer end of the projecting end 6 is a predetermined distance from the front end surface 21 of the side mold (2) ( A tread mold spaced apart by W) and in contact with the side mold (2) A curved portion 7 having a second radius of curvature R2 is formed at the inner surface end portion of (1), and a groove 8 having a height H is formed at the junction where the two molds come into contact with each other. 2) and the tread mold (1) in contact with the specific shape is formed, this height (H) of the protruding end 6 of the side mold (2) from the point where the curved portion (7) of the tread mold (1) ends The distance between the vertex and the bottom surface of the groove 8 is measured. Therefore, since the groove 8 having the height H is formed, the green tire 5 does not directly contact the mold surface when the tread mold 1 and the side mold 2 abut at the initial stage of vulcanization. While the phenomenon of extraction into the gap between the molds is prevented, the appearance of the tire can be formed by the protrusion 6 and the curved portion 7 formed to predetermined dimensions.

On the other hand, as described above, the size of the first curvature radius R1 for obtaining a tire appearance and preventing the tire from being extracted is preferably 2.0 to 2.5 mm, and the second curvature radius R2 is 3.0. ~ 4.0 mm, the distance W between the protruding end 6 and the tip surface 21 of the side mold 2 is in the range of 0.5 to 1.0 mm, and the height H of the groove 8 is in the range of 1.5 to 2.0 mm. It is preferably formed from.

Also, as in the second embodiment shown in FIG. 4, block-shaped protrusions 6 'are formed at both ends of the inner surface of the tread mold 1 in the circumferential direction, and as shown in FIG. Since the side part is pushed by this protruding end 6 ', the green tire 5 can be prevented from directly contacting the mold surface at the joint between the molds.

In addition, as shown in FIG. 5, as shown in FIG. 5, a plurality of block-shaped protruding ends 6 ′ may be formed by spaced apart at regular intervals in both ends of the inner surface of the tread mold 1 in a circumferential direction. Can be.

As described above, according to the present invention, since protrusions are formed at both ends of the inner surface of the vulcanization mold, the tire is not directly in contact with the mold surface at the junction where the mold is in contact with the mold, so that the tire is extracted from the gap between the joints. This is prevented and at the same time formed in a predetermined dimension can be produced in the required shape of the tire appearance has the effect that the tire appearance defective rate is reduced.

What has been described above is only an embodiment for implementing the tire vulcanization mold structure according to the present invention, if one of ordinary skill in the art to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the claims below Anyone can make various changes.

Claims (3)

In the tire vulcanization mold divided into a tread mold and a side mold, Protruding ends (6, 6 ', 6˝) are formed in the circumferential direction at the corners of the inner end of the side mold (2) or the tread mold (1), the protruding end (6) formed in the side mold (2) ) Has a first radius of curvature R1, the outer end of the protruding end 6 is formed spaced apart from the distal end surface 21 of the side mold (2) by a distance (W), while the tread mold (1) Inside both ends of the c) is formed a curved portion 7 having a second radius of curvature R2 has a height (H) and a separation distance (W) at the portion where the tread mold (1) and the side mold (2) are joined Tire vulcanization mold structure, characterized in that the groove (8) is formed. The method of claim 1, wherein the first radius of curvature R1 is 2 to 2.5mm, the second radius of curvature R2 is 3 to 4mm, the separation distance W is 0.5 to 1mm, and the height H is 1.5 to Tire vulcanization mold structure, characterized in that the groove (8) is formed to be 2mm. The tire vulcanization mold structure according to claim 1, wherein the protruding end (6˝) formed in the tread mold (1) is formed in a plurality of blocks spaced at regular intervals.