KR100548756B1 - An Apparatus and Method for Producing Single Winding Bead and Apex Assembly of a Tire - Google Patents

Abstract

The present invention relates to a device for manufacturing a bead-apex assembly for a tire and a method of manufacturing the same.

An upper block 110 extending downward from an upper end and having a rubber injection passage 9 radially branched again; An upper mold (100) disposed below the upper block (110) and having a connecting passage (91) communicating with the rubber injection passage (9) of the upper block (110); A phase ejector ring 200 installed at a lower end of the phase mold 100 and having an upper portion of a bead formed therein; A high ejector ring 300 installed below the phase ejector ring 200 with a bead interposed therebetween and having a lower portion of the bead formed therebetween; A lower mold 400 in contact with and supported by a lower part of the high ejector ring 300; It is connected to the high ejector ring 300, the ejector cylinder 500 for moving in the vertical direction; Apparatus comprising a support pin 600 for fixing the beads in the radial direction of the bead molding, and a drive cylinder 700 for reciprocating the support pin 600, and a method of manufacturing using the same So,

Since the bead and the apex can be molded integrally, there is an advantage that bad tire quality is prevented and productivity is greatly improved.

Description

Apparatus and Method for Producing Single Winding Bead and Apex Assembly of a Tire

1 is a cross-sectional view showing the configuration of a conventional bead-apex assembly for a tire.

FIG. 2 is a diagram illustrating a configuration of an apparatus for manufacturing a bead-apex assembly for a tire according to the present invention, wherein rubber is supplied.

FIG. 3 is a view illustrating a configuration of an apparatus for manufacturing a bead-apex assembly for a tire according to the present invention in which an upper mold is separated from a bead.

FIG. 4 is a view illustrating a case where the lower mold is separated from the bead as an apparatus for manufacturing a bead-apex assembly for a tire according to the present invention.

5 is a plan view of the apparatus for producing a bead-apex assembly for a tire according to the present invention.

6 is a perspective view illustrating a bead inserted into a mold.

※ Explanation of Major Drawings

10 ... Tire Bead

11 ... Hole Wire

12 ... Coating rubber around wire

13 ... Wrap                 

20 ... Apex

50 ... Cavity

60 ... Nozzle

100 ... Phase Mold

110 ... Phase Block

111. Coolant passage

200 ... phase ejector ring

300 ... high ejecting

400 ... Ha Mold

410 ... lower block

600 ... support pin

700 ... drive cylinder

800, 900 Insulation

The present invention relates to a device for manufacturing a bead-apex assembly for a tire and a method for manufacturing the same, and in particular, a device for manufacturing a bead-apex assembly for a tire and a manufacturing method thereof, in which a bead and an apex are integrally formed to simplify a manufacturing process and are firmly coupled. It is about a method.

Beads and Apex among the tire components are parts for supporting the tires on the wheels, and thus require great durability. A typical configuration of such a tire bead-apex assembly is shown in FIG.

As shown, the tire bead 10 is composed of a plurality of wires 11, a rubber 12 surrounding the wire 11, and a wrap 13 surrounding the rubber 12, The upper end is attached to the apex 20.

The general process of manufacturing the tire beads 10 and the apex 20 as described above is as follows.

First, the rubber 12 is coated in advance around the hole wire 11.

In addition, the coated wire 11 is wound while moving from side to side around a cylindrical former (not shown) to form a wire assembly having a rectangular cross section.

Next, the wrap 13 is wrapped around the wire assembly to form the beads 10. The wrap 13 is a thin packaging element topping the woven yarn with rubber. The wrap 13 serves to support the wire 11 assembly so as not to be scattered.

The apex 20 having a triangular cross-sectional shape is attached to the rectangular bead 10 wrapped in the wrap 13. This is achieved by rotating the apex 20 around the wrap 13. This completes the bead-apex assembly 1000.

By the way, if the triangle height of the apex 20 in this process is high, due to the difference in the circumferential distance according to the cross-sectional height in the apex 20 attached to the outer bead of the annular shape, the apex is stretched from the top and bottom The amount will be different. As a result, a phenomenon in which the attached apex 20 is bent occurs, which causes a problem that no further work is possible.

In addition, because the wire 11 is laminated in a rubber-coated state, since the wire 11 is easily dispersed, as described above, the attachment process of the wrap 13 to prevent this is added to reduce productivity. do.

In conclusion, due to poor adhesion and deformation of the apex 20, and additional processes, there is a problem that the poor quality of the tire and a decrease in productivity.

The present invention has been made to solve the above problems, an object of the invention is to produce a bead and apex assembly for a tire that can be solid and prevent quality defects and improve productivity by integrally molding the beads and apex and It is to provide a method of manufacturing the same.

In order to achieve the above object, the manufacturing apparatus of the bead-apex assembly for a tire according to the present invention,

An upper block extending downward from an upper end and having a rubber injection passage again radially branched;

An upper mold disposed below the upper block and having a connecting passage communicating with the rubber injection passage of the upper block;                     

An image ejector ring installed at a lower end of the upper mold and having a concave portion formed at an upper surface of the upper mold;

A lower ejector ring disposed below the upper ejector ring with a bead interposed therebetween, the upper surface having a concave portion formed with a lower portion of the bead;

A lower mold contacting and supporting a lower portion of the high ejector ring;

An ejector cylinder connected to the high ejector ring and moving upward and downward;

It characterized in that it comprises a support pin for fixing the bead in the radial direction during the bead molding, and a drive cylinder for reciprocating the support pin.

The phase mold is preferably connected to the phase block with the heat insulating plate interposed therebetween.

In addition, the lower mold is preferably connected to the lower block with a heat insulating plate therebetween.

In addition, it is preferable that a coolant passage through which coolant passes is formed in the upper block.

In addition, the nozzle is preferably formed to extend from the lower end of the connecting passage to the space where the beads are to be formed.

On the other hand, the manufacturing method of the bead-apex assembly for tires according to the present invention,

Stacking a plurality of hole wires in a former to form beads;

Tying the beads together at intervals along the circumferential direction;

Disposing the beads between the phase ejector and the high ejector so as not to contact the inner circumferential surface of the mounting space;

Installing an upper mold on the upper ejector ring, and installing and supporting a lower mold under the upper ejector ring;

Injecting rubber through a rubber injection passage into a molding space formed between the upper ejection and the lower ejecting ring and between the upper mold and the lower mold;

And separating the finished bead-apex assembly from the mold and ejectoring.

Here, in the separation of the finished bead-apex assembly, it is preferable to first raise the upper mold and the upper ejector ring, and then separate the lower ejector ring with respect to the lower mold.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

2 to 5 show the configuration of the apparatus for producing a bead-apex assembly for tires according to the present invention, and the manufacturing method by the apparatus.

As shown, according to an embodiment of the present invention, between the upper mold 100 and the lower mold 400 is provided with a cavity (Cavity) 50 corresponding to the appearance of the bead-apex assembly, the space The bead 10 and the apex 20 are integrally formed by injecting rubber into the rubber. This will be described in more detail as follows.

The upper mold 100 is coupled to the upper block 110 with an insulating plate 800 interposed therebetween. In addition, the rubber injection passage 9 extending downward from the upper end and radially branched over the upper block 110 and the upper mold 100 is formed in communication. Therefore, in actual operation, the injected rubber is distributed radially from the upper end of the upper block 110 via the upper mold 100.

In addition, an image ejector ring 200 is installed at a lower end of the image mold 100. A recess corresponding to the bead and the apex to be formed is formed on the bottom surface of the phase ejector ring 200.

The upper portion of the bead may be partially formed by the recess formed in the lower surface of the upper mold 100 as well as the upper ejector ring 200.

On the other hand, a lower ejector ring 300 is installed below the upper ejector ring 200. The lower mold 400 is in contact with the lower portion of the high ejector ring 300 to support the lower mold 400. The lower mold 400 is connected to the lower block 410 with the insulating plate 900 interposed therebetween.

The upper surface of the high ejector ring 300 is formed with a recess corresponding to the bead and the apex to be formed. In this case, the lower part of the bead may be partially formed by the recess formed in the upper surface of the lower mold 400 as well as the high ejector ring 300.

The ejector cylinder 300 is connected to the ejector ring 300, so that the ejector ring 300 may be freely moved in the up and down direction with respect to the upper mold 100.

Meanwhile, when the upper mold 100 and the lower mold 400 are coupled together while the bead 10 is installed, a molding cavity 50 surrounding the bead 10 is formed.

At this time, since the bead 10 should be floating in the molding space without touching the molding space 50, the support pin 600 for fixing the beads 10 in the radial direction, and the support pin ( A drive cylinder 700 for reciprocating 600 is provided. The support pin 600 may be retracted from the mold when the injection of the bead-apex rubber is almost completed, so that pin marks do not remain.

Hereinafter, the operation according to an embodiment of the present invention.

First, a hole wire 11 is stacked a plurality of times in a former (former, not shown) to form a bead 10 having a rectangular cross section.

Next, as shown in Figure 6, the rectangular bead 10 is bundled with a coupling means such as a clip (15). At this time, the clip 15 is preferably installed at regular intervals along the circumference of the bead 10 is extended.

As shown in FIG. 3, the beads 10 are installed on the lower mold 400 and the high ejector ring 300. At this time, as shown in Figure 5, by extending the driving cylinder 700 to press the support pin 600 to the side of the bead 10, the lower mold 400 and the ejector ring 300 Bead 10 should be floating so as not to contact the inner peripheral surface of the molding space (50).

Then, the phase ejector ring 200 is installed on the bead 10, and the phase mold 100 is successively installed on the phase ejector ring 200. On the phase mold 100, a phase block 110 for guiding the injected rubber and adjusting the temperature is installed. Inside the upper block 110 and the upper mold 100, rubber injection passages 9 and 91 extending downward from the upper end and branching radially again are formed to communicate with each other. In this configuration, a molding space 50 into which rubber is injected is provided around the bead 10.

Next, through the rubber injection passages 9 and 91 formed in the upper block 110 and the upper mold 100, between the upper ejector ring 200 and the upper ejector ring 300, and the upper mold 100 and the lower ring. Rubber is injected into the molding space 50 formed between the molds 400. The upper block 110 is formed with a passage 111 through which cooling water passes, so that the injected rubber maintains a range of 50 to 100 ° C. At this time, it is preferable to minimize the unnecessary portion of the rubber by allowing the rubber to enter the molding space 50 through the thin nozzle (60). However, if the extracted rubber still remains, it needs to be removed after the molding is completed.

In addition, a heat source of an induction heating method is connected to the upper and lower molds 100 and 400 so that the rubber filled in the molding space 50 is vulcanized in the range of 150 to 200 ° C. Maintaining such a temperature range, but adjusting the time so that the whole is not vulcanized, not only can maintain the stickiness of the surface when separating the beads and the apex assembly, but also no extraction occurs.

Next, the finished bead-apex assembly is separated from the mold 100, 400 and ejector ring 200, 300. As shown in FIGS. 3 and 4, upon separation of the finished bead-apex assembly, the upper mold 100 and the upper ejector ring 200 are first raised, and the lower ejector ring 300 with respect to the lower mold 400. To separate it up. To this end, the cylinder 500 connected to the high ejector ring 300 extends upward.

Finally, after the bead-apex assembly is separated, remove the extraction rubber, if remaining.

According to the present invention having the above-described configuration, by integrally molding the beads and the apex, there is an advantage that bad tire quality is prevented, productivity is greatly improved, and durability is improved.

Claims (7)

An upper block (Block) 110 extending downward from an upper end and having a rubber injection passage 9 radially diverging again; An upper mold (Mold) 100 installed below the upper block 110 and having a connection passage 91 communicating with the rubber injection passage 9 of the upper block 110; An image ejector ring (200) formed at a lower end of the upper mold (100) and having a concave portion formed at an upper surface thereof with a bead formed thereon; A lower ejector ring 300 disposed below the upper ejector ring 200 with a bead interposed therebetween, the upper surface having a concave portion formed with a lower portion of the bead; A lower mold 400 in contact with and supported by a lower part of the high ejector ring 300; It is connected to the high ejector ring 300, the ejector cylinder 500 for moving in the vertical direction; Tire hole beads and apex, characterized in that it comprises a support pin 600 for fixing the beads in the radial direction of the bead molding, and a driving cylinder 700 for reciprocating the support pin 600. Manufacturing equipment. The method of claim 1, The upper mold 100 is a device for manufacturing a bead-apex assembly for a tire, characterized in that connected to the upper block 110 with the insulating plate 800 therebetween. The method according to claim 1 or 2, The lower mold 400 is connected to the lower block 410 with a heat insulating plate 900 interposed therebetween, the apparatus for manufacturing a bead-apex assembly for a tire. The method of claim 1, Apparatus for manufacturing a bead-apex assembly for a tire, characterized in that the upper block 110 is formed with a coolant passage 111 through which the coolant passes. The method of claim 1, Apparatus for producing a bead-apex assembly for a tire, characterized in that the nozzle 60 is formed to extend from the lower end of the connecting passage 91 to the space where the beads are to be formed. Stacking the hole wires 11 in a former multiple times to form beads 10; Tying the beads 10 at intervals along the circumferential direction; Disposing the bead (10) between the upper ejector ring (200) and the high ejector ring (300) so as not to contact the inner peripheral surface of the mounting space; Installing an upper mold (100) on the upper ejector ring (200), and installing and supporting a lower mold (400) below the upper ejector ring (300); Rubber is injected into the molding space 50 formed between the upper ejector ring 200 and the lower ejector ring 300 and between the upper mold 100 and the lower mold 400 through rubber injection passages 9 and 91. Injecting; And separating the finished bead-apex assembly from the mold and ejector ring. The method of claim 6, When the finished bead-apex assembly is separated, the upper mold 100 and the upper ejector ring 200 are first lifted, and the lower ejector ring 300 is separated by the upper ejector ring 300. A method of making a bead-apex assembly.

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