KR100889981B1 - Vulcanizer for bladder - Google Patents

Abstract

A bladder vulcanizer is provided to minimize engagement error and prevent the overflow of rubber by combining the end core and the core cap along the slant wall of the end core bottom protrusion. A bladder vulcanizer comprises a core mold(3) forming the inner surface of a bladder(6), an upper mold(1) and a lower mold(2) forming the exterior of the bladder, an end core(4) having a rubber injection port(5) installed at the bottom center of the upper mold, a core cap(7) installed at the upper center of the core mold in order to form a rubber flow path between the end core, and an air injection port(9) formed on the core cap under the rubber injection port on the same line.

Description

Vulcanizer for Bladder}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vulgarizer of a Bradder for producing tires for vehicles, and more particularly, to an improvement of an end-core and a core cap installed on an upper part of a core mold for taking out a Brader.

The bladder is for forming the inner wall of the tire in the vulcanization process of the vehicle tire.

2 shows a conventional bradder vulcanizer. Such a vulcanizer is composed of an upper mold 101, a lower mold 102 and a core mold 103 corresponding thereto, and an end core 104 is installed on the core mold. The rubber injection portion 105 is formed in the end core portion 104. 2 is a so-called NNE (None-Nozele End Core) method, the rubber injection hole 105 is in contact with the bladder 106, unlike the nozzle type that is injected into the mold by a hole-shaped nozzle It is characterized by being formed in a ring shape connecting the edge of the end core end. The rubber injected through the rubber inlet 105 is moved between the gaps of about 3 mm formed by the end core part 104 and the core cap 107 to enter between the upper and lower molds and the core mold.

In this conventional vulcanizer, the removal of the lower mold 102 and the core mold 103 must be preceded in order to withdraw the bradders 106 vulcanized from the mold. After removing the lower mold 102, the core mold 103 is pulled out and removed. Since the end core part 104 and the core cap 107 do not separate well because a rubber layer 108 is formed therebetween, air is injected into the air inlet 109 to separate and remove the core cap 107. The brother 106 is withdrawn.

In the conventional bladder vulcanizer, the finished bladder 106 is not easy to be pulled out because of the rubber layer 108, and the coupling of the end core portion 104 and the core cap 107 is 3 mm apart. There is a problem that the rubber is introduced between the end core portion and the upper mold because the gap is easy to occur because it must be formed in a gap to form the extraction.

Accordingly, the present invention is to solve the above problems by placing the air inlet under the rubber inlet, and through the core cap to form a protrusion having an inclined wall through the core cap.

That is, according to the present invention, the vulcanized bladder can be easily drawn out by pushing the injected air through the air inlet, and the end core and the core cap are coupled by joining along the inclined wall of the end core bottom protrusion. The deviation is minimized to have an effect of preventing the extraction of the rubber.

The present invention is composed of a core mold (3) for forming the inner surface of the bladder (6), an upper mold (1) and a lower mold (2) for forming the outer surface of the bladder, the upper mold (1) An end core 4 having a rubber inlet 5 is provided at the center of the bottom, and a core cap 7 is formed at the upper center of the core mold 3 to form a rubber flow path between the end core 4. In the case where the air inlet 9 is installed in the core cap 7, the air inlet 9 is characterized in that it is installed in the lower line on the same line as the rubber inlet 5.

It is preferable that eight air inlets 9 are installed in the circumferential direction of the core cap 7, and the diameter of each air inlet 9 is preferably 9-10 mm.

Such a configuration makes it possible to facilitate the withdrawal of the bladder after vulcanization by pushing the air injected into the air inlet 9 to the portion where the bladder 6 and the rubber layer 8 are connected. The conventional air inlet 9 shown in FIG. 2 is too far from the bladder 6, and the air to be injected is blocked by the rubber of the rubber inlet 5, which is relatively large and heavy, making it difficult to reach the bladder. 6) It was hard to expect the effect of boosting. That is, according to the present invention, the air inlet is positioned below the rubber inlet 5 to separate the end core 4 and the core cap 7 by the injection of air, and to push the bladder 6 to facilitate the extraction. It even worked.

The present invention further has the following configuration to solve the deviation of the coupling of the end core 4 and the core cap (7). The end core 4 of the present invention has a protrusion 41 at the bottom, and the protrusion 41 penetrates the core cap 7, and the wall surface where the protrusion 41 and the core cap 7 come into contact with each other on a horizontal plane. The angle a with respect to the angle is inclined at 95-97 degrees. This configuration is that the end core 4 and the core cap 7 is coupled along the inclined surface, thereby minimizing the variation in the coupling.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view of principal parts of a bradder vulcanizer of the present invention.

2 is a sectional view of principal parts of a conventional bradder vulcanizer;

<Description of the code for the main part>

1. Upper mold

2. Lower mold

3. Core mold

4. End core

41.Protrusion

5. Rubber inlet

6. Brader

7. Core Cap

8. Rubber layer

9. Air inlet

Claims (3)

A core mold for forming the inner surface of the bladder and an upper mold and a lower mold for forming the outer surface of the bladder, and an end core having a rubber inlet at the bottom center of the upper mold is installed, and the upper center of the core mold. A core cap is formed on the core to form a rubber flow path therebetween, and the air inlet is installed in the core cap, wherein the air inlet is installed in the same line as the rubber inlet. Vulcanizer. The air conditioner of claim 1, wherein eight air inlets are provided in the circumferential direction of the core cap, and each air inlet has a diameter of 9-10 mm. 2. The bradder vulcanization according to claim 1, wherein the end core has a protrusion at the bottom, the protrusion penetrates the core cap, and a wall surface in which the protrusion and the core cap contact each other has an inclination of 95 to 97 degrees with respect to a horizontal plane. group.

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