JP2002166461A - Cap of extruder and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the cap of an extruder capable of almost uniformly forming the rubber gauge over the lateral direction of the adhesive rubber member bonded to the crown part of an annular tire constituent member and capable of also well performing hole filling, and to provide a method for using the same. SOLUTION: In an extruder for extruding the adhesive rubber member to the outer peripheral surface of the annular tire constituent member having a toroidal shape to bond the same thereto, the cap 5 for molding the adhesive rubber member into a plate shape to extrude the same bas an extrusion opening 25 having a flat rectangular shape long in its lateral direction and one long opening edge of the extrusion opening is notched to form an edging surface and a recessed part 27, of which the planar outer surface opposed to the annular tire constituent member of the cap 5 is notched at its central part, is formed by removing a part of the edging surface 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruder for attaching an adhesive rubber member to a ring-shaped tire member in a process of manufacturing a tire or a retreaded tire, and a method of using the extruder.

[0002]

2. Description of the Related Art An extruder of this type has a retreading device for rehabilitating tires, as disclosed in JP-A-8-50629.
In the retreading device described in the above publication, the base portion 01 has an upper mold 02 and a lower mold 03 called lips as shown in the front view of FIG. And has a predetermined opening between them.

The upper mold 02 protrudes from the lower mold 03, and the upper mold 02
The outer rubber surface of the upper mold 02 is guided between the outer surface 02a of the upper mold 02 and the crown portion of the buff tire by the rotation of the buff tire, and is pressed by the outer surface 02a. It is affixed while filling the crown.

A steel belt is buried in the crown portion of the buff tire to have high rigidity, has a curvature, and has a center in the left-right width direction most protruding. The adhesive rubber member is the thinnest and the side portion is attached thickly, and the thickness becomes uneven. Therefore, an edge surface 02b called a chamfer is formed at the opening edge of the upper mold 02.

[0005]

FIG. 12 shows the result of actually measuring the thickness (rubber gauge) of the adhesive rubber member adhered to the buff tire by the retreading device using the base, and FIG. FIG. 13 shows the results of the ratios.

In FIG. 12, the vertical axis indicates the rubber gauge of the adhesive rubber member, and the horizontal axis indicates the position of the tire section in the width direction of the buff tire. Numbers are assigned in ascending order. Up to around ± 6 corresponds to the crown portion, and outside from around ± 7 corresponds to the shoulder portion.

[0007] This is a retreading device having a structure in which the rubber material charged into the cylinder is fed to the die at the tip of the cylinder by the rotation of the screw inside the cylinder and extruded. It is shown. The internal pressure of the buff tire is 1.5bar
Is set to

The variation in the rubber gauge is large due to the difference in the number of screw rotations, and although the gauge is improved at the center of the crown (origin 0), the gauge becomes thinner overall and becomes thicker around ± 5 (rigidity due to the belt). It is presumed to be due to the influence of the bending of the center and the shoulder part having a high degree).

FIG. 13 shows the rubber gauge difference when the amount of tire deflection (corresponding to the pressure applied to the base of the buff tire, and the amount of advance when the buff tire is further pressed and bent after contacting the base) is changed. And the change of the fill factor.
A dashed line α ′ indicates a change in the rubber gauge difference, and a dashed line β ′ indicates a change in the filling factor.

The hole filling rate (β ') gradually increases in proportion to the tire bending amount in a certain range of tire bending amount (10 to 25 mm). Want to be bigger. However, when looking at the change in the rubber gauge difference (α ′), the rubber gauge difference becomes smaller up to the tire deflection amount of 16 mm, but when the tire deflection exceeds 16 mm, the rubber gauge difference is reversed and the rubber gauge difference becomes larger.

Therefore, simply increasing the amount of tire deflection increases the hole filling rate, but increases the difference between the rubber gauges, resulting in an uneven thickness of the adhesive rubber member. For this reason, it has been difficult to achieve both a reduction in the rubber gauge difference and an improvement in the filling rate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to form a rubber gauge over a width direction of an adhesive rubber member attached to a crown portion of a ring-shaped tire component so as to be substantially uniform. The present invention is to provide a die of an extruder and a method of using the same, in which the filling is performed well.

[0013]

In order to achieve the above object, the invention according to the first aspect of the present invention is directed to an extrusion method in which an adhesive rubber member is extruded and adhered to an outer peripheral surface of a toroidal-shaped annular tire component. In the machine, a die for molding and extruding the adhesive rubber member into a plate shape has a long flat rectangular extrusion opening elongated in the width direction, and one long opening edge is cut out to form a rimming surface, The base of the extruder formed by cutting out a part of the edging surface was formed by cutting out a part of the edging surface at a central portion of a flat outer surface facing the annular tire constituent member of the base.

An annular tire having a toroidal shape, which has a beveled surface at one long opening edge of the base and a concave portion formed by cutting off a part of the inclined surface at the center of the flat outer surface. When the component is brought into contact with the contact surface of the base (the flat outer surface and the inner surface of the concave portion at the center), the center of the crown portion of the annular tire component is fitted into the concave portion, and the pressure at the center portion is reduced. You. That is, the contact pressure fluctuating on the left and right planes of the base due to the pressing force of the tire is made substantially uniform by adjusting the cut amount (depth) of the concave portion,
It is possible to reduce the difference in the rubber gauge of the adhesive rubber member attached to the outer peripheral surface of the annular tire constituent member and make it substantially uniform in the width direction.

Further, the rubber material extruded from the die accumulates on the edging surface and is supplied to the pressed contact surface of the ring-shaped tire constituent member, so that the filling ratio is improved. Therefore, both the reduction of the rubber gauge difference and the improvement of the filling rate can be achieved.

According to a second aspect of the present invention, in the extruder according to the first aspect, the recess formed by cutting out the outer surface of the die has a smoothly curved surface in the left-right direction. It is characterized in that the maximum depth is 1 to 5 mm and the lateral width is 60 to 200 mm.

By forming a concave portion having a surface smoothly curved in the left-right direction with a maximum depth of 1 to 5 mm and a left-right width of 60 to 200 mm, the width direction of the crown portion with respect to various annular tire constituent members can be increased. The adhesive rubber member can be stuck with a substantially uniform thickness throughout.

According to a third aspect of the present invention, in the extruder according to the first or second aspect, the recess formed by cutting out the outer surface of the die has a surface smoothly curved in the left-right direction. The curved surface of the recess has a radius of curvature substantially equal to the radius of curvature at the center of the crown portion of the annular tire component.

The recess on the outer surface of the base has a curved surface having a radius of curvature substantially equal to the radius of curvature of the center of the crown of the annular tire component, so that the center of the crown of the annular tire component fits into the recess. Thus, the adhesive rubber member can be attached with a more uniform thickness across the width of the crown portion.

According to a fourth aspect of the present invention, in the extruder die according to the first or second aspect, when the edged surface of the die forms an inclined surface, the inclined surface is 15 degrees with respect to the outer surface.
It has an angle of up to 40 degrees.

The edge slope of the base is 15 to
By setting the angle to 40 degrees, the extruded rubber material can be supplied to the abutting portion of the annular tire component from a state in which an appropriate amount of the rubber material is stored on the inclined surface, and the hole can be satisfactorily filled.

According to a fifth aspect of the present invention, in the die of the extruder according to the first or second aspect, at least a cross-sectional area obtained by cutting a portion whose outer surface is cut off by a rim surface of the die in a direction perpendicular to the width direction is at least. 20 mm ² .

The rubber material extruded from the die accumulates in the portion where the outer surface is scraped off by the rim surface of the die. By setting the cross-sectional area of the portion cut perpendicularly to the width direction to at least 20 mm ² , it is sufficient Can be stored and supplied to the contact portion of the annular tire constituent member, and the hole can be satisfactorily filled.

According to a sixth aspect of the present invention, in the die of the extruder according to the first aspect, the upper die and the lower die are combined to form an elongated flat rectangular extrusion opening in the width direction to form the die. The long opening edge of the upper die is constituted by the edging surface, and the concave portion has a part of the edging surface missing at a central portion of a flat outer surface opposed to the annular tire component member of the upper die. It is characterized by being formed.

Since the base is composed of a combination of the upper die and the lower die, the manufacture of the base becomes easy, and the shape of the base can be changed by replacing only one of the bases, thereby reducing the cost.

According to a seventh aspect of the present invention, in the die of the extruder according to the sixth aspect, the upper die projects from the lower die toward the annular tire component. The crown portion of the annular tire component properly contacts the outer surface of the upper mold without disturbing the outer surface of the lower mold, and adheres with a uniform thickness across the width of the crown while ensuring a high filling rate A rubber member can be attached.

According to an eighth aspect of the present invention, in the die of the extruder according to the sixth aspect, the same concave portion as the concave portion formed in the central portion of the outer surface of the upper die is formed in the central portion of the outer surface of the lower die. It is characterized by having been done.

Even when the annular tire component abuts on the outer surfaces of the upper die and the lower die, the lower die prevents the lower die from rotating the annular tire component due to the concave portion of the lower die. Any disruption to supply is prevented as much as possible.

According to a ninth aspect of the present invention, in the die of the first aspect, the edging surface is a curved surface.

The adhesive rubber member extruded from the base is smoothly supplied from the state of being appropriately stored by the curved surface of the long opening edge to the contact portion between the outer surface and the ring-shaped tire component, and the hole is filled. Can be performed favorably.

According to a tenth aspect of the present invention, the outer surface of the die of the extruder and the outer peripheral surface of the toroidal annular tire component are pressed against each other, and the annular tire component is pushed from the other long opening edge of the die. 9. The method according to claim 1, wherein the adhesive rubber member is extruded while being rotated toward a long opening edge having one edging surface, and the adhesive rubber member is attached to the outer peripheral surface of the annular tire component member. It is a method of using the die of the extruder described.

The adhesive rubber member extruded from the die of the extruder is stored in an appropriate amount on the edging surface, and is then dragged by the rotation of the annular tire component and pressed against each other to press the outer surface of the die and the outer periphery of the annular tire component. The adhesive rubber member can be stuck to the crown portion of the ring-shaped tire component member with a substantially uniform thickness by the concave portion at the center of the outer surface and the left and right planes, while being supplied between the surface and the surface.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below with reference to FIGS. The extruder 1 according to the present embodiment is an extruder that extrudes an adhesive rubber member for a retreaded tire, and is provided on an outer peripheral surface of a toroidal buff tire B (annular tire constituent member) in which a tread portion of a tire is peeled off and buffed. The adhesive rubber member C is attached.

A new tread member is adhered to the buff tire B by the adhesive rubber member C. The adhesive rubber member C
Is simultaneously filled with holes such as scratches on the surface of the buff tire B. FIG. 1 is an overall side view of the extruder 1, a buff tire B, and a moving table 11 thereof.

In the extruder 1, a cylinder 3 containing a screw is installed horizontally on a base 2, and a driving mechanism 4 such as a motor and a speed reducer is provided on the base end side of the cylinder 3.
The base 5 is attached to the other end, and the rubber material charged into the cylinder 3 is fed toward the base 5 while being kneaded by the rotation of the screw, is formed by the base 5, and is extruded as the adhesive rubber member C. .

On the other hand, the buff tire B has an extruder 1
And supported by a horizontal rotating shaft 12 of a movable base 11. The movable base 11 is placed on the rail 13 and moves along the rail 13 so that the supported buff tire B can be brought close to the base 5 and pressed.

The extruder 1 may be movable so that the base 5 is pressed against the buff tire B supported at a fixed position. The horizontal rotating shaft 12 supporting the buff tire B is driven to rotate by a motor (not shown), and can rotate the buff tire B integrally in a direction indicated by an arrow in FIG.

FIG. 2 shows a front view of the base 5. The base 5 is oriented horizontally in the horizontal direction from the upper mold 21 and the lower mold 22.
mm gap is formed, and side dies 23, 24
Are formed, and long flat rectangular openings 25 are formed on the left and right.

The upper mold 21 projects forward by about 5 mm from the lower mold 22 (see FIG. 4), and has an outer surface 21 facing the buff tire B.
a is a vertical plane, and as shown in FIGS.
The upper surface (upper die 21) has a long opening edge deeper in the center and shallower than the left and right sides.
The inclined surface 26 erodes the outer surface 21a. In particular, the central area is most eroded (at least
(Erosion amount of 10 mm), the erosion amount gradually decreases toward the left and right sides.

A concave portion 27 is formed in the central portion of the outer surface 21a in which the inclined surface 26 has been eroded the most. Recess
27 has a smoothly curved surface in the left-right direction,
Is partially missing.

Referring to FIG. 3, inclined surface with respect to outer surface 21a
The inclination angle θ of 26 is 17 degrees, the radius of curvature RR of the curved surface of the inclined surface 26 in the vertical direction is 1100 mm, and the width W of the concave portion 27 is 115 m.
m, depth λ is 2.5 mm, radius of curvature R of the curved surface of the recess 27 is 660 m
m.

It is suitable that the width W of the concave portion 27 is 60 to 200 mm, the depth λ is 1 to 5 mm, and the radius of curvature R is a value close to the radius of curvature at the center of the crown portion of the buff tire B. The lower mold 22
The opening edge does not form an inclined surface, and the outer surface 22a and the horizontal surface form a right angle.

The state where the upper die 21 of the base 5 and the buff tire B are opposed to each other is shown by a solid line in a top view of FIG. The contact surface between the outer surface 21a of the upper die 21 and the concave portion 27 is opposed to the outer peripheral surface of the buff tire B.

When the buff tire B comes into contact with the upper mold 21, the center of the crown portion of the buff tire B, which is curved and slightly protrudes, is fitted into the concave portion 27. When the buff tire B is further pressed, the left and right planes as shown by two-dot chain lines in FIG. The shoulder portion bends as the crown portion comes into contact with the outer surface 21a, and the outer surface 21a can support the deflection, and the abutment portion is formed despite the high rigidity belt b being embedded in the crown portion. The pressing force over the width direction becomes substantially uniform.

When the adhesive rubber member C is adhered to the outer peripheral surface of the buff tire B, the buff tire B is supported on the horizontal rotating shaft 12 of the moving base 11, and the buff tire B supported by moving the moving base 11 is And push it. Since the upper die 21 of the base 5 is protruded by the lower die 22, the buff tire B comes into contact with the outer surface 21a of the upper die 21 and the curved surface of the concave portion 27 at the center.

In a state where the buff tire B is in contact with and pressed against the base 5 of the extruder 1, the extruder 1 is driven to extrude the adhesive rubber member C from the base 5, and the buff tire B is connected to the base 5.
Rotate to move upward on the side.

When the adhesive rubber member C which spreads to the left and right from the base 5 and is formed into a plate shape is extruded, the extruded adhesive rubber member C comes into contact with the outer peripheral surface of the rotating buff tire B as shown in FIG. Is fed into the upper curved surface 26 and stored in an appropriate amount, and is supplied to the contact portion between the curved surface of the outer surface 21a and the concave portion 27 and the outer peripheral surface of the buff tire B, and is pressed against the outer peripheral surface of the buff tire B. It is attached.

Since the rubber material accumulated in the inclined surface 26 is pressed against the outer peripheral surface of the buff tire B by the concave portion 27 and the outer surface 21a, if there is a hole or the like on the outer peripheral surface due to a scratch or the like, it can be filled. At the same time, the adhesive rubber member C is adhered to the outer peripheral surface of the buff tire B.

As described above, the outer surface 21a, which is the contact surface of the upper mold 21, and the curved surface of the concave portion 27 make the pressing force in the width direction of the contact portion substantially uniform. The rubber gauge C is substantially uniform in the width direction.

FIG. 6 shows the result of actually measuring the thickness of the adhesive rubber member adhered to the buff tire in the present embodiment. 6, the vertical axis represents the rubber gauge, and the horizontal axis represents the tire section position in the width direction of the buff tire B, as in FIG.

FIG. 12 shows the results of an experiment conducted on three types of screws in the cylinder 3 of the extruder 1 having different rotation speeds. As is apparent from comparison with FIG. It is small and maintains an appropriate thickness at the center of the crown (origin 0) without thinning the gauge as a whole. I have.

FIG. 7 shows the change in the rubber gauge difference and the hole filling rate with respect to the amount of tire deflection as in FIG.
Represents the change in the rubber gauge difference, and the solid line β represents the change in the hole filling rate, both of which are those of the present embodiment (provided with the concave portions 27). For comparison, the experimental results using a conventional extruder (FIG. 1)
3) is also shown at the same time, and alternate long and short dashed lines α ′ and β ′ show the change in the rubber gauge difference and the change in the hole filling rate of the conventional one described in the above-mentioned publication (without concave portions).

With respect to the difference in rubber gauge, when the tire contact pressure increases, the conventional one-dot chain line α 'decreases to a certain extent, but increases when the tire deflection amount, which is not so large, exceeds 16 mm. This embodiment (solid line α) is smaller than the conventional one as a whole, and is reduced to a considerably large tire deflection (about 24 mm).

On the other hand, with respect to the filling rate, as the tire contact pressure increases, the present embodiment (solid line β) also changes from the conventional one (dot-dash line β).
') Gradually increases, but the hole filling rate of the present embodiment (solid line β) is slightly higher than that of the conventional one (dashed line β').

Conventionally, when the tire contact pressure is increased to improve the filling ratio, the rubber gauge difference is increased, and it has been difficult to achieve both improvement of the filling ratio and reduction of the rubber gauge difference. As described above, with the simple configuration in which the concave portion 27 is formed in the outer surface 21a of the upper die 21 of the base 5, it is possible to improve both the hole filling rate and reduce the difference in the rubber gauge.

FIG. 8 shows changes in the rubber gauge of the adhesive rubber member C adhered to the buff tire B while changing the depth λ (amount of shaving) of the recess 27, and shows the tire section in the width direction of the buff tire B. 3 locations (0, 3,
6 section).

When the depth λ is 0 (corresponding to the prior art), 0,
It can be seen that the rubber gauges vary greatly at the 3 and 6 section positions, but as the depth λ increases, they approach each other and the rubber gauge difference decreases.

When the depth λ is 2.5 mm (this embodiment),
3 section positions (the middle position between the center and the shoulder)
And the rubber gauges at the six section positions (shoulder portions) are substantially equal, the rubber gauge at the zero section position (central part) is slightly smaller, and the adhesive rubber member is adhered with a substantially uniform thickness across the width direction. You can see that.

Next, a modification of the upper die of the die will be described. FIG.
The upper die 21 (FIG. 8) and the other three types of upper dies 41, 51, and 61 according to the embodiment are shown, and the upper die 41 in FIG. 8 is such that the edging surface 46 erodes the outer surface 41a. The upper die 51 in FIG. 9 has a larger amount of the edging surface 56 eroding the outer surface 51a in the left-right width direction than the center, and the upper die 61 in FIG. Is formed with a curved surface 66 having a long opening edge instead of an inclined surface.

The four types of upper molds shown in FIG.
FIG. 10 is a table showing the rubber gauge differences and the hole filling ratios obtained for the dimensions, tire flexure, and the dimensions of 21, 41, 51, 61 and the conventional die. Note that an internal pressure of 1.5 bar is applied to the buff tire B for all types.

The reason why the tire deflection is set to 16.1 mm in the case of the conventional mouthpiece is that the rubber gauge difference increases when the diameter exceeds 16.1 mm as described above. 87%.

On the other hand, for the upper dies 21, 41, 51, and 61 of the present invention, even if the tire deflection amount is increased up to 21.8 mm, the rubber gauge difference is reduced and shows a substantially minimum value, which is about 0.25 mm. The value is considerably smaller than the value, and the adhesive rubber member is attached with a substantially uniform thickness in the width direction. Also, the filling rate
It shows high values of 90% and 89%.

As described above, the four types of upper dies 21, 41, 51, 61
In both cases, both the reduction of the rubber gauge difference and the improvement of the hole filling rate are compatible.

In the above embodiment, the upper die of the die projects forward from the lower die. However, the upper die and the lower die have the same outer surface as the concave portion provided in the upper die. The recess may be provided at the center of the lower mold.

The rotating annular tire member abuts on the lower die as well as the upper die, but the lower die prevents the lower die from rotating the annular tire structural member or prevents the extruded adhesive rubber member from being smoothly supplied. There is nothing to hinder.

Although the present embodiment has been applied to the application of the adhesive rubber member to the buff tire in the process of manufacturing a retreaded tire, the present invention is not limited to the buff tire and applies to various annular tire constituent members. Is applicable.

Further, since the base 5 is composed of the upper die 21, the lower die 22, and the side dies 23, 22, the manufacture of the base is facilitated, and the cost can be reduced by changing only one of the bases. However, the entire base may be integrally formed.

[Brief description of the drawings]

FIG. 1 is an overall side view of an extruder, a buff tire, and a moving base thereof according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a front surface of a die of the extruder.

FIG. 3 is a perspective view showing the shape of the upper die of the die.

FIG. 4 is a top view showing a state in which the upper die of the base and the buff tire face each other.

FIG. 5 is a cross-sectional view showing a state where an adhesive rubber member is adhered to a buff tire by the extruder.

FIG. 6 is a view showing a rubber gauge of an adhesive rubber member adhered to a buff tire by the extruder.

FIG. 7 is a diagram showing a rubber gauge difference and a hole filling ratio with respect to a tire bending amount.

FIG. 8 is a diagram showing a change in a rubber gauge according to the depth of a concave portion provided in an upper die of a die.

FIG. 9 is a view showing the shape of an upper die and various upper dies of a die of the extruder.

FIG. 10 is a diagram showing a table of each dimension, a rubber gauge difference, and a hole filling rate for various types of upper molds.

FIG. 11 is a front view of a mouthpiece of a conventional extruder.

FIG. 12 is a view showing a rubber gauge of an adhesive rubber member adhered to a buff tire by a conventional extruder.

FIG. 13 is a diagram showing a rubber gauge difference and a hole filling ratio with respect to a tire deflection amount in a conventional die.

[Explanation of symbols]

B: buff tire, C: adhesive rubber member, 1: extruder, 2
... Base, 3 ... Cylinder, 4 ... Drive mechanism, 5 ... Base, 11 ...
Moving table, 12 ... horizontal rotation axis, 13 ... rail, 21 ... upper mold, 22 ...
Lower mold, 23, 24… Side mold, 25… Opening, 26… Slope, 27…
Concave part, 41 ... Upper mold, 46 ... Inclined surface, 47 ... Concave part, 51 ... Upper mold, 56
... Slope, 57 ... Recess, 61 ... Upper, 66 ... Slope, 67 ... Recess.

Claims (10)

[Claims] 1. An extruder for extruding and adhering an adhesive rubber member to an outer peripheral surface of a toroidal-shaped annular tire constituent member, wherein a die for extruding the adhesive rubber member into a plate shape and extruding the plate is elongated in the width direction. It has a rectangular extrusion opening, one long opening edge of which is cut out to form a edging surface, and a recess formed by cutting out a central portion of a flat outer surface facing the annular tire component member of the die. A die for an extruder, wherein a part of the edging surface is missing. 2. The concave portion having a cutout in the outer surface portion of the base has a surface smoothly curved in the left-right direction, the maximum depth from the outer surface is 1 to 5 mm, and the left-right width is 60 to 200 mm. The die of the extruder according to claim 1, characterized in that: 3. A concave portion having a cutout in an outer surface portion of the base has a surface curved smoothly in the left-right direction, and a curved surface of the concave portion has a curvature substantially equal to a radius of curvature at the center of a crown portion of the annular tire component. 3. A die for an extruder according to claim 1, wherein the die has a radius. 4. The method according to claim 1, wherein when the edge surface of the base forms an inclined surface, the inclined surface has an angle of about 15 to 40 degrees with respect to the outer surface. Extruder cap. 5. The extruder according to claim 1, wherein a cross-sectional area obtained by cutting a portion whose outer surface is cut off by a rim surface of the die perpendicularly to a width direction is at least 20 mm ² . Base. 6. The upper die and the lower die are combined to form a flat rectangular extrusion opening elongated in the width direction to form the die, and the upper die long opening edge is formed by the edging surface. The extrusion according to claim 1, wherein the concave portion is formed in a central portion of a flat outer surface facing the upper annular tire component member by removing a part of the edging surface. Machine cap. 7. The die for an extruder according to claim 6, wherein the upper mold projects from the lower mold toward the annular tire component. 8. A die for an extruder according to claim 6, wherein a concave portion formed in a central portion of an outer surface of said upper die is formed in a central portion of an outer surface of said lower die. . 9. The extruder according to claim 1, wherein said edging surface is a curved surface. 10. An outer surface of a die of the extruder and an outer peripheral surface of a toroidal-shaped annular tire component are pressed against each other, and the annular tire component has one edged surface from the other long opening edge of the die. 2. The method according to claim 1, wherein the adhesive rubber member is extruded while rotating toward the long opening edge, and the adhesive rubber member is attached to the outer peripheral surface of the annular tire component member.
Use of the extruder cap described.