KR100768600B1 - Device and method for manufacturing green product of tire - Google Patents

Abstract

A device and a method for manufacturing half-finished tire products are provided to increase productivity by putting an inner liner and sidewall assembly produced by bonding sidewalls to both sides of an inner liner into a green case molding process. In a device method for manufacturing half-finished tire products, an extruder body(20) is composed of an inner liner rubber discharge port(21) molding inner liner rubber in a predetermined shape and discharging the molded inner liner rubber; and sidewall rubber discharge ports(22) formed at both sides of the inner liner rubber discharge port to mold sidewall rubber produced by integrally forming sidewalls, a base strip, and a rim flange in a predetermined shape and discharge the molded sidewall rubber. An extruding and joining mouth piece(30) installed at the front end of the extruder body forms an integral inner liner and sidewall assembly by joining the sidewalls to both sides of an inner liner by receiving and extruding the inner liner and sidewall rubber ejected from the discharge ports through an extruding and joining port(31).

Description

Tire semi finished product manufacturing apparatus and method {DEVICE AND METHOD FOR MANUFACTURING GREEN PRODUCT OF TIRE}

1 is a cross-sectional view showing an example of a tire semi-finished product bonded to the inner liner and sidewall manufactured according to the present invention.

2 is a partially exploded perspective view showing a tire semifinished product manufacturing apparatus according to the present invention.

<Explanation of symbols for main parts of the drawings>

10: inner liner and sidewall assembly, 11: inner liner,

15: side wall, 21: inner liner rubber outlet,

22: sidewall rubber outlet, 30: extrusion bonding mold,

31: Extrusion splicing outlet.

The present invention relates to a tire semifinished product manufacturing apparatus and method, and in particular, by forming the inner liner and sidewall integrally, it is possible to improve tire productivity and reduce the joining of parts to solve the problems caused by joining tire semi-finished product manufacturing apparatus And to a method.

In general, pneumatic tires are configured to maximize the performance of the ride, noise, maneuverability, etc. for the first time.

Such a pneumatic tire includes an inner liner constituting the inside of the tire, a carcass stacked on the outer circumference of the inner liner, a belt stacked on the outer circumference of the carcass, and a layer laminated on the outer circumference of the belt to substantially contact the ground. A tread, both sidewalls constituting both sides of the tire, and both beads coupled to the wheel to maintain the internal air pressure of the tire.

Looking at the process of manufacturing such a tire, the semi-finished products are manufactured for each of the various components of the tire, and the semi-finished products are sequentially wound on a molding drum of a tire molding machine, and then pressed with a squeezing roll to squeeze the semi-finished products to each other. After manufacturing the case, the green case is put into the vulcanization mold and subjected to a vulcanization process of applying temperature and pressure to the inside of the green case with a bladder, thereby producing a tire that can actually be used.

In addition, in the green case forming process, the primary green case is molded into a primary molding, and the secondary green case is formed into two moldings, and the primary green case and the secondary case are shaped by shaping ( After shaping), the final green case is molded and then vulcanized. The primary green case refers to a case formed by assembling them through an inner liner, a carcass, a bead installation and turn-up process, and a sidewall attachment process using a forming drum and a pressing roll. The secondary green case is a belt or a cap. Refers to a case molded by assembling plies and treads. Such a green case molding method is well disclosed in Korean Patent Laid-Open Publication No. 2005-119028.

By the way, in the primary molding step, the inner liner, carcass, bead, and sidewall separately prepared as semi-finished products are attached in advance, so that the productivity in manufacturing the respective components is lowered. In addition, when the components are separately manufactured, the molding process is further added as much as the components in the molding process, thereby lowering the productivity in manufacturing the green case. In addition, non-uniform bonding is likely to occur in the process of joining the components, and this non-uniform bonding portion also causes a problem in that the tire quality is degraded due to a decrease in the uniformity of the tire, and excessively between the components. The overlapping part is generated, resulting in problems such as waste of material and fuel consumption due to weight increase.

The present invention has been made in consideration of the above-described conventional problems, and aims to improve tire productivity by reducing the innerliner and sidewalls integrally, and to solve the problems caused by the joining by reducing the joining of parts.

In order to achieve the above object, the semi-finished tire manufacturing apparatus according to the present invention, the inner liner rubber outlet for forming and discharging the inner liner rubber in a predetermined shape, and formed on both of the inner liner rubber outlet, sidewall and base strip and An extruder body having a sidewall rubber outlet configured to discharge the sidewall rubber having a rim flange integrally formed into a predetermined shape; The inner liner and sidewall assemblies, which are installed at the front end of the extruder main body and are supplied with the inner liner rubber and sidewall rubbers discharged from the outlets through an extrusion bonding outlet, and have sidewalls joined to both sides of the inner liner, respectively. It is characterized in that it comprises a; extrusion bonding to form.

In addition, according to the present invention, the method for manufacturing a semi-finished tire according to the present invention comprises molding and discharging the inner liner rubber into a predetermined shape by an extruder main body, and at the same time, the sidewall rubber having both sidewalls, a base strip, and a rim flange integrally formed thereon. Shaping and discharging each into a predetermined shape; Receiving the inner liner rubber and the both sidewall rubbers through one extrusion joint outlet, and extruding them to form an inner liner and a sidewall assembly each having sidewalls joined to both sides of the inner liner; It is done.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

1 shows an example of a tire semifinished product obtained by the manufacturing apparatus and method according to the present invention.

The tire semi-finished product shown in FIG. 1 shows an example of an inner liner and a side wall assembly 10 in which sidewalls 15 are integrally joined to both sides of the inner liner 11, respectively, at both ends of the inner liner 11. A rim flange 12 is formed, and the sidewall 15 is joined to the end of this rim flange 12. In addition, a base strip 16 is joined to the end of the sidewall 15, which is the sidewall 15 toward the innerliner 11 with respect to the portion of the rim flange 12 when forming the green case. It is a part to fold and attach.
Here, the rubber compositions forming the innerliner 11, the sidewall 15, the rim flange 12, and the base strip 16 are selected as necessary, and each rubber composition must be identical or different. Each configuration is merely classified according to its position.

An apparatus of the present invention for manufacturing the above-described innerliner and sidewall assembly 10 is shown in FIG. 2, which comprises an extruder body 20 and an extrusion bonding die 30.

The extruder main body 20 is formed at both of the inner liner rubber outlet 21 for discharging the inner liner rubber into a predetermined shape and the inner liner rubber outlet 21 to form the sidewall rubber in a predetermined shape. And a sidewall rubber outlet 22 for discharge. Here, the sidewall rubber means that the sidewall 15, the rim flange 12 and the base strip 16 are integrally formed.

Therefore, when the rubber is injected into the inlet of the inner liner rubber outlet 21 and the inlet of the side wall rubber outlets 22 to pressurized and discharged, the inner liner rubber and the side wall rubbers of a predetermined formation may be continuously discharged.

In addition, the extruded splice fitting 30 receives the inner liner rubber and side wall rubbers discharged from the extruder main body 20 simultaneously as described above, and extrudes, so that side wall portions are joined to both sides of the inner liner 11, respectively. And an inner liner and sidewall assembly 10 formed integrally with each other, and having one extrusion joint outlet 31. The extrusion joint outlet 31 includes an inner liner extrusion zone 32 in the center portion and sidewall extrusion zones 33 respectively connected to communicate with each other in the inner liner extrusion zone.

The total cross-sectional area of the extrusion joint outlet 31 is preferably smaller than the overall cross-sectional areas of the innerliner rubber outlet 21 and the sidewall rubber outlets 22 of the extruder body 20. In this case, the extrusion joint outlet 31 At the time of extrusion of the innerliner and sidewall assembly 10 through), the innerliner rubber and the sidewall rubbers may be joined and integrated by pressing.

That is, when the inner liner and the side wall assembly 10 are to be extruded, the inner liner rubber is molded into a predetermined shape and discharged by the extruder main body 20, and at the same time, both sides of the side wall rubber are predetermined. The inner liner rubber and the both side wall rubbers are supplied through one extrusion-bonding outlet 31 and extruded, respectively, and pressed to each side of the inner liner 11 by pressing. 15) may be bonded to each other to form an integrated inner liner and sidewall assembly 10 and may be discharged through the extrusion joint outlet 31.

According to the apparatus and method for manufacturing a semi-finished product according to the present invention configured as described above, the inner wall 11 and the side wall 15 are not separately molded into semi-finished products, respectively, but the side wall 15 is formed on both sides of the inner liner 11. By inserting the inner liner and sidewall assembly 10 bonded together) into the green case forming process, the production productivity of the semi-finished tire required for the green case forming process can be significantly increased.

In addition, when forming the green case, the inner liner 11 and the side wall 15 are not separately put in to form the green case, but the inner liner and the side wall assembly 10 are put in to form the green. The productivity for case molding can be significantly increased.

In addition, when the inner liner 11 and the side wall 15 are molded to be integrally bonded together, the problem of non-uniformity between the inner liner 11 and the side wall 15 that has occurred conventionally during molding the green case is solved. Uniformity can be ensured, thereby improving tire quality.

In addition, since the overlapping parts between the components can be reduced, the material cost can be saved, and the fuel efficiency can be improved by reducing the weight.

Claims (2)

Inner liner rubber outlet 21 for discharging the inner liner rubber into a predetermined shape, and side wall rubber formed at both sides of the inner liner rubber outlet and integrally formed with sidewalls, base strips and rim flanges. An extruder body (20) having a sidewall rubber outlet (22) for molding and discharging; It is installed at the front end of the extruder body, the inner liner rubber and the side wall rubber discharged from the outlets are supplied through the extrusion joint outlet 31 and extruded, so that the side wall 15 on each side of the inner liner 11 An apparatus for manufacturing a semi-finished product, comprising: an extrusion joining die (30) joined to form an integrated inner liner and sidewall assembly (10). Molding and discharging the inner liner rubber into a predetermined shape by the extruder body, and simultaneously molding and discharging the side wall rubber having a side wall, a base strip, and a rim flange integrally formed at both sides thereof into a predetermined shape; ; Receiving the inner liner rubber and the both sidewall rubbers through one extrusion joint outlet, and extruding them to form an inner liner and a sidewall assembly each having sidewalls joined to both sides of the inner liner; Tire semi-finished product manufacturing method.

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