JP2001252992A - Method and apparatus for manufacturing tire component, and method and apparatus for manufacturing crude tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a tire component wherein the tire component can be efficiently manufactured by few processes, and miniaturization of the manufacturing apparatus and reduction of an installing space and equipment investment can be achieved while a method and an apparatus for manufacturing a crude tire is provided. SOLUTION: A rubber coated code 2 is helically wound on a mandrel 18 so as to be partly overlapped, and a cord-contained cylindrical component 3 is formed. Then, the cord-contained cylindrical component 3 is helically cut to manufacture a beltlike tire component 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a tire component such as a belt member, which is a belt-like rubber member having a cord embedded therein, and a method and an apparatus for manufacturing a raw tire using the apparatus. .

[0002]

2. Description of the Related Art A belt member, which is a tire constituent member, has a cord embedded at an oblique angle with respect to a longitudinal direction of a belt.

[0003] In the case of manufacturing such a belt member, conventionally, a plurality of aligned cords are coated with rubber by a calendar to form a continuous belt-shaped rubber coating member, and the rubber coating member is once formed into a large roll. Take up on a roll.

[0004] The continuous belt-shaped rubber-coated member wound on the roll is unwound and taken out, cut obliquely at a predetermined bias angle at a belt width pitch, and the pieces are joined together by joining the side edges together. A belt member having a cord embedded diagonally is formed, and the belt member is wound around a roll.

[0005] The belt member wound around the roll is
It is transported to a forming machine, unwound, cut into fixed lengths for one tire, and wound around a forming drum to produce a raw tire.

[0006]

As described above, conventionally,
The belt member is manufactured through many steps, and the production efficiency is not good.

Further, an apparatus for manufacturing a long belt-shaped belt member by obliquely cutting a rubber-coated member at a predetermined bias angle and sequentially joining the cut pieces, requires a large installation space, requires a large installation space, and requires a large capital investment. I need.

[0008] Further, since the belt member manufacturing apparatus becomes larger, it is not possible to equip each molding machine with the belt member manufacturing apparatus. Therefore, the long belt-shaped belt members that are sequentially manufactured are directly guided to the forming drum side. Since molding cannot be performed, the roll is once wound up on a roll, and the entire tire manufacturing facility must be larger.

Further, according to the conventional method of manufacturing a long belt-shaped belt member by obliquely cutting a rubber-coated member at a predetermined bias angle and sequentially joining the cut pieces, a joint portion exists in the belt member, and a tire is provided. Adversely affect the uniformity of the

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to efficiently manufacture tire components in a small number of steps, to reduce the size of a manufacturing apparatus and to reduce installation space and equipment investment. The present invention provides a method and apparatus for manufacturing a tire component that can be achieved.

Another object of the present invention is to provide a method and an apparatus for producing a raw tire that can efficiently produce a raw tire by consolidating the entire raw tire production equipment.

[0012]

In order to achieve the above object, according to the first aspect of the present invention, a rubber-coated cord is spirally wound around a mandrel so as to partially overlap the mandrel, and a cylindrical member containing the cord is wound. Then, the cord-containing cylindrical member is spirally cut to produce a belt-shaped tire component.

The rubber-coated cord can be spirally wound around the mandrel, and the formed cord-containing cylindrical member can be spirally cut to produce a belt-shaped tire component. The installation space and equipment investment can be reduced along with the downsizing of the manufacturing apparatus.

Further, by spirally winding the rubber-coated cord around the mandrel for one tire, the tire can be manufactured by cutting the cord-containing cylindrical member into a spiral shape. It is not necessary to wind the long belt-shaped belt member on a roll, and it is not necessary to cut the long belt-shaped belt member for each tire. The whole equipment can be made small and raw tires can be manufactured efficiently.

According to a second aspect of the present invention, in the method for manufacturing a tire constituent member according to the first aspect, the rubber-coated cord is spirally wound around the mandrel so as to partially overlap the rubber while covering the cord. A cord-containing cylindrical member is formed.

By incorporating the operation of coating the rubber with the cord into the tire manufacturing process without performing a separate operation, the rubber-coated cord can be manufactured and used without excess and deficiency, and there is no need to store the rubber-coated cord. No storage equipment is required.

According to a third aspect of the present invention, a rubber member is wound around a peripheral surface of a mandrel, and a cord is spirally wound around a rubber member wound around a mandrel to form a corded cylindrical member. Is a method of manufacturing a tire component in which a belt-shaped tire component is manufactured by spirally cutting a tire.

A tire component is efficiently manufactured in a small number of steps by winding a rubber member around a mandrel, spirally winding a cord, and spirally cutting the formed cord-containing cylindrical member to produce a belt-shaped tire component. As a result, it is possible to reduce the installation space and equipment investment as well as downsize the manufacturing apparatus.

Further, by winding the rubber member and the cord around the mandrel by a length of one tire, by cutting the cylindrical member containing the cord in a spiral shape, a tire component member of one tire can be manufactured. It is not necessary to wind the belt-shaped belt member on a roll, and it is not necessary to cut the belt-shaped belt member for each tire.
The number of man-hours in the post-process is also reduced, so that the entire raw tire manufacturing equipment can be reduced in size, and the raw tire can be manufactured efficiently.

According to a fourth aspect of the present invention, in the tire component manufacturing apparatus, the rubber-coated cord that supplies the rubber-coated cord to the peripheral surface of the mandrel while moving in the axial direction is provided. It is characterized by comprising a supply means and a cutting means for cutting a cord-containing cylindrical member formed on the peripheral surface of the rotating mandrel by a cutter moving in an axial direction.

By supplying the rubber-coated cord to the peripheral surface of the mandrel while moving it in the axial direction by the rubber-coated cord supply means, the rubber-coated cord can be spirally wound around the mandrel to form a cord-containing cylindrical member. By cutting the cord-containing cylindrical member that rotates by the cutter that moves in the axial direction, the cord-containing cylindrical member can be spirally cut to form a belt-shaped tire component.

With the simple configuration of the mandrel, the rubber-coated cord supply means, and the cutting means, the tire components can be manufactured, and the manufacturing apparatus can be reduced in size and installation space and equipment investment can be reduced.

According to a fifth aspect of the present invention, there is provided a mandrel which is a rotating cylindrical shaft, winding means for winding a rubber member around the peripheral surface of the mandrel, and a cord wound around the rubber member wound around the rotating mandrel. A tire component manufacturing apparatus comprising: a cord supply unit that supplies a cord while moving in a direction; and a cutting unit that cuts a cord-containing cylindrical member formed on a peripheral surface of the rotating mandrel by a cutter that moves in an axial direction. is there.

The rubber member is wound around the mandrel by the winding means, and the cord is supplied to the rotating rubber member while moving in the axial direction by the cord supply means, whereby a cord-containing cylindrical member is formed and the cord is rotated by the cutting means. By cutting the containing cylindrical member with a cutter that moves in the axial direction, the cord-containing cylindrical member can be spirally cut to form a belt-shaped tire component.

With the simple structure of the mandrel, the winding means, the cord supply means and the cutting means, the tire components can be manufactured, so that the manufacturing apparatus can be reduced in size and installation space and equipment investment can be reduced.

According to a sixth aspect of the present invention, a tire component produced for each tire by the tire component producing apparatus according to the fourth or fifth aspect is taken out from the mandrel, and the taken out tire composition is taken out. A raw tire manufacturing method in which a member is transferred to a forming drum, and the transferred tire constituent member and other tire constituent members are formed by the forming drum to manufacture a raw tire.

The tire 1 is manufactured by the tire component manufacturing apparatus.
Since the tire component is manufactured for each main component, the tire component can be directly transferred to a molding drum without being wound up on a roll and used for the production of a raw tire. The whole production equipment can be made small, and raw tires can be manufactured efficiently.

According to a seventh aspect of the present invention, there is provided a take-out means for taking out, from the mandrel, a tire component produced for each tire by the tire component producing apparatus according to the fourth or fifth aspect, and The raw tire manufacturing apparatus is provided with a transferring means for transferring the tire constituent member to a forming drum, and a raw tire forming means for forming the transferred tire constituent member and other tire constituent members by the forming drum.

The tire components produced for each tire are taken out by the take-out means, transported to the forming drum by the transport means, and the tire components and other tire components are molded by the molding drum to produce a raw tire. can do.

[0030] A raw tire can be manufactured with a simple configuration of a tire component manufacturing apparatus, a take-out means, a transfer means, and a molding drum. Capital investment can be reduced.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below with reference to FIGS. FIG. 1 is a plan view showing an overall configuration of a raw tire manufacturing facility 10 according to the present embodiment.

FIG. 1 shows a belt member manufacturing apparatus 11 for partially manufacturing a belt member 4 which is a tire constituent member. Referring to FIG. 1 and FIG. (Stranded Wire) A steel cord 1 is formed from a creel 12 around which an extruder 13 is wound.
Of the rubber-coated cord 2 is extruded.

A mandrel 18, which is a cylindrical shaft supported on a base 17, is provided horizontally at the downstream side of the extruder 13, and the mandrel 18 is driven to rotate by a motor provided on the base 17. Rails 16 laid in parallel along the mandrel 18
a to guide the rubber-coated cord supply port 16 into the mandrel 18
Move along.

The rubber-coated cord 2 extruded from the extrusion head 13a of the extruder 13 is linearly regulated in the direction of extrusion by a regulating roll 14, and then faces a rubber-coated cord supply port 16, where the rubber-coated cord supply port 16 From 16 is wrapped around the mandrel 18.

The rubber-coated cord 2 has a mandrel 18 at the tip.
And is wound around the mandrel 18 by rotation of the mandrel 18 (rotation in the direction indicated by the arrow in FIG. 2). At the same time as the rotation of the mandrel 18, the rubber-coated cord supply port 16 moves along the mandrel 18 at a predetermined speed, so that the rubber-coated cord 2 is wound on the mandrel 18 in a spiral shape, overlapping the previously wound part, and entering the cord. The cylindrical member 3 is formed.

The cross section of the corded cylindrical member 3 is as shown in FIG. For example, if the rubber-coated cord 2 has a substantially rectangular cross-section, the rubber-coated cords 2 are joined so that the side surfaces thereof overlap as shown in FIG. . If the covering rubber of the rubber covering cord 2 has a cylindrical shape with a flange, FIG.
As shown in (2), the rubber-coated cords 2 are joined such that their flanges overlap each other.

A cutter 15 is arranged on the upstream side of the rubber-coated cord supply port 15, and the rubber-coated cord 2 is supplied by the cutter 15 where the rubber-coated cord 2 is supplied for a length corresponding to one tire. Disconnect. Therefore, the corded cylindrical member 3 for one tire is formed on the mandrel 18.

Referring to FIGS. 1 and 4, a disk-shaped cutter is provided axially along the mandrel 18 on the downstream side of the mandrel 18.
20 are provided movably. Disc type cutter 20
The take-out conveyor 21 located below the mandrel 18 is also provided movably in the axial direction of the mandrel 18.

The disc-shaped cutter 20 has its rotation center axis inclined at a predetermined angle θ with respect to the rotation center axis of the mandrel 18 so that the base end side of the mandrel 18 contacts the outer surface, and the rotation of the mandrel 18 At the same time (rotation in the direction indicated by the arrow in FIG. 4), the disc-shaped cutter 20 moves along the mandrel 18 toward the tip of the mandrel 18 at a predetermined speed.

Then, the disc-shaped cutter 20 is moved to the mandrel 18.
The corded cylindrical member 3 formed on the outer surface is cut from the end edge and cut spirally as shown in FIG. 4 to manufacture a belt member 4 for one tire.

A groove may be spirally formed on the outer surface of the mandrel 18 along the path through which the disk-shaped cutter 20 passes, and the disk-shaped cutter 20 is guided by the groove to form a cord-containing cylinder. By cutting the member 3 in a spiral shape, accurate and reliable cutting is performed, and a high-quality belt member can be manufactured.

Referring to FIG. 5, the manufactured belt member 4
Is a band-shaped member having a length L and a width W, and both end surfaces have an angle equal to the inclination angle θ of the disc-shaped cutter 20 with respect to the elongate direction, and a long flat parallelogram is formed as a whole. The steel cord 1 embedded therein is substantially parallel to the end face.

Assuming that the diameter of the corded cylindrical member 3 formed on the mandrel 18 is d, the width of the end face of each end of the belt member 4 is πd which is the circumferential length of the corded cylindrical member 3.
And the width W of the belt member 4 is πd sinθ. Further, the speed is set so that the pitch p of the spiral cutting of the corded cylindrical member 3 based on the rotation speed of the mandrel 18 and the moving speed of the disc-shaped cutter 20 becomes πd tanθ.

The length L of the belt member 4 is determined by the length of the corded cylindrical member 3 formed on the mandrel 18, and the number of windings of the belt member 4 when it is spirally cut is n. πd · n / cosθ.

A take-out conveyor 21 extending obliquely and horizontally with respect to the axial direction from below the mandrel 18 moves in the same axial direction at the same speed as the disc-shaped cutter 20, and is cut into a spiral to form the mandrel. The portion of the belt member 4 peeled off from the belt 18 is continuously taken out on the take-out conveyor 21.

When the disc-shaped cutter 20 finishes cutting the cord-containing cylindrical member 3 in this manner, a belt member 4 for one tire is formed, and is conveyed to the sticking conveyor 22 by the take-out conveyor 21. The manufactured belt member 4 has no joint,
By using such a belt member 4, the uniformity of a tire finally manufactured can be improved.

The belt member 4 conveyed to the attaching conveyor 22
As shown in FIG. 6, the belt member 4 is attached to the BT drum 23 disposed on the attaching conveyor 22 in such a manner that the belt member 4 is wound.

A spiral layer server 24 extends toward the upper part of the BT drum 23, and the spiral layer 5 is supplied from the spiral layer server 24 to the BT drum 23, and is placed on the belt member 4 wound around the BT drum 23. Is further wound around the spiral layer 5.

The cord 5a is embedded in the spiral layer 5 so as to be directed in an angle direction of 0 to 5 degrees which is almost parallel to the longitudinal direction of the belt-shaped rubber member. Thus, the BT drum 23
Although not shown, a tread may be supplied and wound on the belt member 4 and the spiral layer 5 wound around the belt.

A BT transfer 30 and a forming drum 31 are provided coaxially in the rotation axis direction of the BT drum 23.
The BT transfer 30 goes to get the belt member 4, the spiral layer 5, etc. wound around the BT drum 23.

The BT transfer 30 sandwiches the spiral layer 5 from outside, supports the spiral layer 5 and the belt member 4 and the like by the diameter reduction of the BT drum 23, and moves toward the forming drum 31 (see FIG. 8). As shown in FIG. 8, a carcass ply 6 in which a cord 6a is buried in the axial direction is wound around the forming drum 31.

The belt member 4 is moved by the BT transfer 30.
The spiral layer 5 and the like are positioned on the outer periphery of the carcass ply 6 wound around the
As shown in FIG. 9, the belt member 4 and the spiral layer 5 are overlapped on the carcass ply 6 by expanding the diameter of the 31, so that the BT transfer 30 opens and retracts the belt member 4 and the spiral layer 5 and the like.

The forming drum 31 includes a carcass ply 6, a belt member 4, and a spiral layer 5 stacked on the drum circumference.
Then, a tread 7 is pasted, inflated and molded to produce a raw case. The raw case is vulcanized and molded by a molding machine at the next stage to produce a tire.

FIG. 10 shows the structure of the completed tire T. The cords 6a, buried in the carcass ply 6, the belt member 4, and the spiral layer 5, respectively, are shown.
1, 5a have a relative angle to each other.

Looking at the angles of the cords with the equator direction of the tire T as the reference 0 °, the cord 6a of the carcass ply 6 is almost at a right angle of 85 to 90 ° and the steel cord 1 of the belt member 4 is
Is 45 to 75 degrees, and the code 5a of the spiral layer 5 is almost parallel 0 to 5 degrees. When the directions of the three types of codes 6a, 1, and 5a are combined, as shown in FIG. (A shape), and each of the cords 6a, 1, 5a has a structure that shares and balances the tension (so-called delta Δ structure). Since the tire T has the delta Δ structure, the strength is improved in each step.

In the raw tire manufacturing equipment 10, the rubber-coated cord 2 is spirally wound around the mandrel 18 in the belt member manufacturing apparatus 11, and the cord-containing cylindrical member 3 for one tire is provided.
Is formed, and the formed corded cylindrical member 3 is spirally cut to manufacture the belt-shaped belt member 4, so that the belt member manufacturing apparatus 11 itself can be significantly reduced in size as compared with the related art, and therefore, the molding can be performed. The apparatus can be directly provided with the belt member manufacturing apparatus 11, so that the installation space and equipment investment of the biological tire manufacturing apparatus 10 can be reduced.

The belt member manufacturing apparatus 11 manufactures the belt member 4 by forming the corded cylindrical member 3 for one tire as described above and cutting the formed corded cylindrical member 3 spirally. Belt member 4 efficiently with few processes
It is not necessary to wind a long belt-shaped belt member around a roll as in the related art, and it is not necessary to cut the long belt-shaped belt member for each tire. The number of raw tires can be reduced, the whole raw tire manufacturing equipment 10 can be made smaller, and raw tires can be manufactured efficiently.

Since the operation of coating the steel cord 1 with rubber is incorporated into the raw tire manufacturing process without performing a separate operation, the rubber-coated cord 2 can be manufactured and used without excess and deficiency. There is no need to store and no storage equipment is required.

In the above embodiment, the steel cord 1
The rubber-coated cord 2 is spirally wound around the mandrel 18 so as to partially overlap with the rubber to form the cord-containing cylindrical member 3, but the rubber member is wound around the peripheral surface of the mandrel. The cord may be spirally wound to form a corded cylindrical member, or a rubber member may be further wound thereon to form a corded cylindrical member.

In the above-described embodiment, the belt member 4 and the spiral layer 5 are wound around the BT drum 23, and are transferred to the forming drum 31 by the BT transfer 30. The member 4 and the spiral layer 5 may be wound directly around the forming drum 31.

FIG. 12 shows such an example. The reference numerals of the members are the same as those in the above embodiment. Belt member manufacturing equipment
11 and the take-out conveyor 21, the pasting conveyor 22, the spiral layer server 24 and the like are the same as those in the above-described embodiment,
There is no T-drum 23 and BT transfer 30, and a molding drum 31 is provided movably in the axial direction.

Therefore, as shown by the two-dot chain line in FIG. 12, the belt member 4 and the spiral layer server 24 conveyed by the take-out conveyor 21 from the belt member manufacturing apparatus 11 in a state where the forming drum 31 is moved onto the attaching conveyor 22. The supplied spiral layer 5 can be wound directly without passing through the BT drum 23.

Therefore, a BT drum and a BT transfer are not required, and the capital investment is reduced, the number of working steps is reduced, and a green tire can be manufactured more efficiently.

[Brief description of the drawings]

FIG. 1 is a plan view showing an overall configuration of a raw tire manufacturing facility according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a part of a belt member manufacturing apparatus.

FIG. 3 is a sectional view of a corded cylindrical member.

FIG. 4 is a schematic perspective view of a part of a belt member manufacturing apparatus and a vicinity of a BT drum.

FIG. 5 is an explanatory diagram for explaining a shape of a belt member.

FIG. 6 is a schematic plan view showing how a belt member is wound around a BT drum.

FIG. 7 is a schematic plan view showing how a spiral layer is supplied to a BT drum.

FIG. 8 is a schematic plan view showing a state in which a belt member and a spiral layer are transferred from a BT drum to a forming drum.

FIG. 9 shows a carcass ply, a belt member,
It is a schematic plan view showing the state where the spiral layer was wound.

FIG. 10 is a perspective view showing a partially completed structure of a completed tire in a cross section.

FIG. 11 is an explanatory diagram illustrating a delta Δ structure of a tire.

FIG. 12 is a plan view showing an overall configuration of a raw tire manufacturing facility according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steel cord, 2 ... Rubber coating cord, 3 ... Corded cylindrical member, 4 ... Belt member, 5 ... Spiral layer, 6 ... Carcass ply, 7 ... Tread, 10 ... Raw tire production equipment, 11 ... Belt production equipment , 12 ... creel, 13
… Extruder, 14… Regulatory roll, 15… Cutter, 16… Rubber coated cord supply port, 17… Base, 18… Mandrel, 20… Disc type cutter, 21… Remove conveyor, 22… Attached conveyor, 23
... BT drum, 24 ... Spiral layer server, 30 ... B
T transfer, 31 ... Molded drum.

Claims (7)

[Claims] 1. A method of manufacturing a belt-shaped tire component by spirally winding a rubber-coated cord around a mandrel so as to partially overlap with the mandrel to form a cord-containing cylindrical member, and cutting the cord-containing cylindrical member into a spiral. A method for producing a tire constituent member, comprising: 2. The tire structure according to claim 1, wherein the cord-coated cylindrical member is formed by spirally winding the rubber-coated cord around the mandrel so as to partially overlap the cord while covering the cord with rubber. Manufacturing method of the member. 3. A rubber member is wound around a peripheral surface of a mandrel, and a cord is spirally wound around a rubber member wound around a mandrel to form a corded cylindrical member. The corded cylindrical member is cut into a spiral shape. A method for producing a tire component, comprising: producing a belt-shaped tire component by using the same. 4. A mandrel which is a rotating cylindrical shaft, a rubber-coated cord supply means for supplying a rubber-coated cord to the peripheral surface of the mandrel while moving in the axial direction, and a rubber-coated cord supply means formed on the peripheral surface of the rotating mandrel. And a cutting means for cutting the corded cylindrical member by a cutter moving in the axial direction. 5. A mandrel which is a rotating cylindrical shaft, a winding means for winding a rubber member around a peripheral surface of the mandrel, and a cord supplied to the rubber member wound around the rotating mandrel while moving in the axial direction. And a cutting means for cutting a cord-containing cylindrical member formed on a peripheral surface of the rotating mandrel by a cutter moving in an axial direction. 6. A tire constituent member manufactured for each tire by the tire constituent member manufacturing apparatus according to claim 4 or 5, is taken out from the mandrel, and the taken-out tire constituent member is transferred to a forming drum. And a method of manufacturing a raw tire by molding the transferred tire constituent member and other tire constituent members by the forming drum. 7. A take-out means for taking out, from the mandrel, a tire component produced for each tire by the tire component producing apparatus according to claim 4, and molding the taken-out tire component. A raw tire manufacturing apparatus comprising: a transfer unit that transfers the tire components and other tire components that are transferred to a drum;