JP2009039903A - Method and device for manufacturing unvulcanized tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mold a green tire without expanding a film-like inner liner to the shape of the green tire. <P>SOLUTION: The film 42a cut in a predetermined length is held with clamps 28a, 28b of a film conveying device 20 to convey into the center hole of a tire molded body T (refer to Fig. 4A). The film 42a to be conveyed is pressed by a roller 39 of a film pressing device 30 and disposed in the inner surface of the tire molded body T (refer to Fig. 4B). Meanwhile, the clamps 28a, 28b are moved in the direction approaching to each other by a predetermined distance so that a tension is not loaded on the film 42a. Subsequently, the next film 42a is disposed so that the film 42a already disposed and the edge part are overlapped (refer to Fig. 4C). The film 42a is disposed on the whole surface of the inner part of the tire molded body T by repeating these operations. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for manufacturing an unvulcanized tire using a film inner liner, and more particularly, an unvulcanized tire in which a plurality of film inner liners having a predetermined length are attached to the inner surface of a tire molded body so that the edges thereof overlap. The present invention relates to a manufacturing method and apparatus.

  As shown in FIG. 5 (a cross-sectional view showing the structure of a conventional pneumatic tire), the pneumatic tire has bead wires 72 for fixing the tire to the rim at both ends in the tire width direction. A carcass 73 extending in a toroidal shape is arranged around the bead wire 72 so as to wind up from the inside to the outside of the tire. A belt layer 74 for reinforcing the carcass 73 is disposed outside the carcass 73 in the tire radial direction (upper side in the drawing), and a tread portion 75 is provided outside the belt layer 74.

Further, sidewall rubber 76 is attached to both sides of the carcass 73, and on the other hand, an inner liner 77 made of a film-like sheet is disposed inside the carcass 73 in order to keep the tire air pressure constant. .
The inner liner 77 is formed by attaching a film-like sheet cut to a length equal to or greater than the circumference of the tire molding drum to the tire molding drum, and heat-treating the ends of the sheets.

FIG. 6 is a view showing a state in which a film-like sheet is attached to a tire molding drum for molding a conventional inner liner, FIG. 6A is a perspective view of the tire-forming drum with a film-like sheet attached, and FIG. It is the side view.
As shown in FIG. 6A, the tire molding drum 81 is shown in the drawing while adsorbing the leading end portion 82a of the film-like sheet 82 supplied from a supply means (not shown) by an adsorption means (not shown) on the molding drum 81. Rotate in the direction of the arrow and take up.

  After the film-like sheet 82 is wound on the tire molding drum 81, as shown in FIG. 6B, the rear end portion 82b is stacked on the front end portion 82a to form a joint portion 82c, and the joint portion 82c is heated. While pressing, the film inner liner is molded.

By the way, the film inner liner molded in this way is thicker than the portion not subjected to the heat treatment in the joint portion 82c subjected to the heat treatment because the two film-like sheets 82 are thermally welded. , Rigidity increases.
Note that this phenomenon is not limited to the case where an inner liner is manufactured by welding films, but for example, an adhesive is applied to the rear end portion 82b, and the front end portion 82a and the rear end portion 82b are bonded to each other, thereby forming a film inner liner. This can also occur in the case of manufacturing. That is, when the two film-like sheets 82 of the joint portion 82c are integrated by solidifying the adhesive, the rigidity of the portion is increased and the extensibility is lowered.

  As a result, when the cylindrical tire constituent member is expanded to the shape of a raw tire, only the joint portion 82c subjected to the heat treatment has higher rigidity than the portion not subjected to the heat treatment, so that the entire tire is uniform. The result is that the tire uniformity is deteriorated.

Therefore, it is known that a synthetic resin film serving as an inner liner is formed into a seamless cylindrical shape so that the inner liner expands uniformly, and a tire is molded using the synthetic resin film.
For example, when manufacturing a pneumatic tire, there is known a method of manufacturing a green tire by supplying a required amount of a single-layer or multi-layer cylindrical thermoplastic film obtained by extrusion molding of a thermoplastic resin onto a molding drum. (See Patent Document 1).

According to this method, even when the tubular thermoplastic film is expanded to the shape of a green tire, the tubular thermoplastic film is uniformly extended, so that the above problem can be solved.
However, when manufacturing tires of various sizes (tire diameters) by this method, it is necessary to prepare a cylindrical thermoplastic film for each size, and it takes time and effort to form the cylindrical thermoplastic film. .
In addition, it is difficult to store the tubular thermoplastic film in the first place, or in order to ensure adhesion after vulcanization, the tubular thermoplastic film is coated on one side in advance. Alternatively, since it is necessary to apply an adhesive on the molding drum, handling around the molding drum is difficult.

Therefore, in order to solve this problem, the present applicant arranges a plurality of strip-shaped resin films cut to a predetermined width and length in the tire circumferential direction so as to partially overlap, and joins them with an adhesive or the like, The manufacturing apparatus of the sheet-like tire structural member which unites and forms a film inner liner was proposed (refer patent document 2).
According to this, since a plurality of overlapping portions of the resin films are formed at regular intervals in the tire circumferential direction, when the cylindrical tire constituent member is expanded to the shape of the raw tire, the entire tire can be expanded uniformly. Also, since resin films cut into a predetermined width and length for each predetermined tire size are joined together to form a film inner liner, it is not necessary to prepare a resin film for each tire size, and the resin film can be easily Can be stored.

However, if the sheet-like tire component produced by this production apparatus is expanded to the shape of a raw tire, the entire tire will be expanded uniformly, but the joint portion is difficult to extend, so stress is concentrated in the vicinity. There is a possibility that the bonded parts may be peeled off.
Japanese Patent No. 3159886 Japanese Patent Application No. 2006-307719

  The present invention has been made in order to solve the above-described problems. The purpose of the present invention is to form a raw tire without expanding the film-like inner liner into the shape of the raw tire, and to form a film member having the same width. It is to be used as an inner liner for tires of various sizes.

The invention of claim 1 is a method of manufacturing an unvulcanized tire comprising a film layer made of a plurality of films of a predetermined length on the inner surface of a tire molded body, the step of holding the tire molded body, and the tire The step of transporting the film into the center hole of the molded body, the step of placing the transported film in a direction intersecting the equator plane of the tire molded body, and the film and the edges are overlapped with each other. And disposing the next film on the inner surface of the molded tire, and forming the film layer by arranging the film on the entire inner surface of the molded tire.
According to a second aspect of the present invention, in the method for producing an unvulcanized tire according to the first aspect, the arranging step is a step of pressing the inner surface of the tire molded body without stretching the film. And
Invention of Claim 3 is the manufacturing method of the unvulcanized tire as described in Claim 1 or 2, After the process of arrange | positioning the conveyed film in the direction which cross | intersects the equatorial plane of the said tire molded object, The method includes a step of rotating the tire molded body by a predetermined amount in the circumferential direction.
The invention according to claim 4 is an apparatus for manufacturing an unvulcanized tire having a film layer made of a plurality of films of a predetermined length on the inner surface of a tire molded body, the tire molded body holding the tire molded body. Means, film transport means for transporting the film into the tire molded body central hole, and an arrangement in which the film transported into the tire molded body central hole is disposed on the inner surface of the tire molded body in a direction intersecting the equator plane. And a film layer is formed by arranging the film on the entire inner surface of the tire molded body with the edges thereof overlapped with each other.
According to a fifth aspect of the present invention, in the unvulcanized tire manufacturing apparatus according to the fourth aspect, the tire molded body holding means includes a rotating means for rotating the held tire molded body by a predetermined amount in the tire circumferential direction. It is characterized by having.
The invention of claim 6 is the apparatus for producing an unvulcanized tire according to claim 4 or 5, wherein the film conveying means includes holding means for holding one or both ends of the film, and the holding means. And a guide member that guides the holding means during movement, and when the placement means places the film on the inner surface of the tire molded body, the holding means is directed toward the center in the tire width direction. It is made to move, and it is made to press on the inner surface of the said tire molded object, without applying tension | tensile_strength to the said film.
According to a seventh aspect of the present invention, in the unvulcanized tire manufacturing apparatus according to any one of the fourth to sixth aspects, the disposing means is a roller disposed inside the tire molded body, and the roller is acceptable. It is connected to a drive mechanism through a flexible arm.

  According to the present invention, since the raw tire can be molded without expanding the film-like inner liner into the shape of the raw tire, it is possible to suppress the peeling of the joint portion and the occurrence of cracks in the film. In addition, since one type of film member can be used as an inner liner for tires of various sizes, the stock space of the film member can be reduced, and the film member can be easily managed.

Hereinafter, an unvulcanized tire manufacturing apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
The film inner liner affixing device, which is an embodiment of the unvulcanized tire manufacturing apparatus of the present invention, is a tire molded body (here, molded with a tire constituent member excluding the inner liner and molded into a shape close to the shape of the product tire. A tire molded body holder corresponding to the tire molded body holding means of the present invention for holding an unvulcanized tire), and a film inner liner (hereinafter referred to as a thermoplastic resin cut to a predetermined length corresponding to the film conveying means) A film conveying device that conveys the film into the center hole of the tire molded body, and the film conveyed into the center hole of the tire molded body corresponding to the arrangement means is pressed against the inner surface of the tire molded body (here "Arrangement" means that the film is pressed and placed so as not to peel off) and the film is transported. It consists a film feeding device for feeding to the location.

FIG. 1 is a front view showing a tire molded body holder and a film pressing device constituting a film inner liner attaching device according to an embodiment of the present invention.
The tire molded body holder 10 includes a plurality of (upper and lower two illustrated) pressing portions 11 having a driving mechanism (not shown) such as a cylinder mechanism and a ball screw mechanism corresponding to the rotating means of the present invention. The pressing portion 11 is fixed to a main body (not shown) of the tire molded body holder 10. The plurality of pressing portions 11 are arranged in an annular shape, and include a substantially planar contact portion 11a that contacts the molded tire T in the radial center direction.
When the tire molded body T is held, as shown in the figure, the tire molded body T is arranged inside the plurality of pressing portions 11, and the contact portion 11a of the pressing portion 11 is driven by a driving mechanism (not shown). Driving in the radial center direction of T, the contact portion 11a is brought into contact with the outer peripheral surface of the tire molded body T to press and hold the tire molded body T.

  The pressing portion 11 of the tire molded body holder 10 is held by moving along the outer peripheral surface of the tire while the tire molded body T is held and the contact portion 11a is directed toward the center in the tire radial direction. The tire molded body T can be rotated in the tire circumferential direction. Further, the molded tire is intermittently rotated at a predetermined pitch, and the amount of rotation for each pitch can be changed by setting.

  The film pressing device 30 includes two support columns 32 provided on the upper surface of a plate-shaped base 31 installed on the floor, a plate-shaped member 33a supported horizontally by the support columns 32, and upward from both ends thereof. A screw rod support portion 33 having a U-shaped cross section composed of an extended side surface 33 b, a screw rod 34 attached horizontally between the side surfaces 33 b of the screw rod support portion 33, and a portion screwed into the screw rod 34. A screw rod support portion 35 comprising a hook-shaped member 35a, a plate-like member 35b formed integrally with the other end of the member 35a in the vertical direction, and a side surface 35c extending horizontally from both ends thereof, and the screw A screw rod 36 vertically attached between the side surfaces 35c of the rod support portion 35, an arm support member 37 screwed into the screw rod 36, one end is fixed to this, and a roller 39 is rotatable at the other end. Installed substantially U-shaped roller Consisting of over arm 38..

  The roller 39 has a cylindrical shape, and the length of the cylinder is the curvature of the tire molded body T so that the film can be pressed on the side surface of the cylinder when the roller 39 is pressed against the inner surface of the tire molded body T. Decide together. The roller arm 38 is flexible so that the roller 39 moves smoothly along the inner surface of the tire.

A servo motor M, which is a drive mechanism, is connected to one end of the screw rods 34 and 36, and the screw rods that are screwed into these by driving the servo motor M to rotate the screw rods 34 and 36 forward and backward. By moving the support portion 35 in the horizontal direction and the arm support member 37 in the vertical direction, the roller 39 inserted into the center hole of the tire molded body T can be moved along the inner surface thereof.
The driving of the motor is controlled by a control unit (not shown) of the film inner liner sticking device.

FIG. 2 is a perspective view showing the film transport device 20 and the film supply device 40 that constitute the film inner liner attaching device according to the embodiment of the present invention.
The film transport device 20 can travel on the floor surface in the Y-axis direction (the arrow direction is the positive direction) in the figure, and has a groove 22 having a predetermined width in the X-axis direction in the figure, and slides on the groove of the carriage 22. A support column 24 installed on a possible slide plate 23, an arm 26 corresponding to the guide member of the present invention mounted horizontally on the upper end thereof, and a lower surface of the arm 26 slidably mounted along the arm 26 A pair of clamp support members 27a and 27b and clamps 28a and 28b, which are holding means for holding the film, are fixed to one side of each of the clamp support members 27a and 27b.

The clamp support members 27a and 27b are formed so as to be able to approach or separate from each other by a driving device corresponding to the moving means of the present invention such as a well-known transmission mechanism such as a screw transmission mechanism and a motor (not shown).
Moreover, the film transport apparatus 20 is provided with a cutting means (not shown), and a long film 42a supplied from a film roll 42 described later is cut into a predetermined length by the cutting means.

  The film supply device 40 includes a film roll 42 in which a long film 42a is wound around a winding shaft 41 and a film drawing device 43. Both ends of the winding shaft 41 are rotatably supported by support means (not shown). The film roll 42 is fixed at a predetermined position.

Here, the film drawing device 43 shows only the clamp support member 43a and the clamp 43b. For example, the film drawing device 43 includes a column installed on a carriage different from the carriage 22 that can run on the floor surface in the Y-axis direction. The arm is horizontally attached to the upper end portion thereof, the clamp support member 43a is attached to an arbitrary position on the lower surface of the arm, and the clamp 43b is attached to the clamp support member 43a and holds the film 42a.
The film drawing device 43 moves in the direction indicated by the arrow A in the figure while holding the end of the film 42a of the film roll 42 with a clamp 43b.

Next, a procedure for supplying a film from the film supply apparatus 40 shown in FIG. 2 to the film transport apparatus 20 will be described.
3A and 3B are diagrams for explaining a procedure for supplying a film from the film supply apparatus 40 to the film transport apparatus 20. FIG. 3A shows a state in which the film 42a is pulled out from the film roll 42, and FIG. FIG. 3C shows a state in which the film 42 a is cut from the film roll 42 while being held by the clamps 28 a and 28 b of the transport device 20.

First, the clamp 43b of the film drawing device 43 holds the tip of the film 42a drawn out from the film roll 42, and in this state, the film drawing device 43 is moved in the positive direction of the Y axis, as shown in FIG. The film 42a is pulled out from the film roll 42.
Next, as shown in FIG. 3B, the film transport device 20 moves in the positive direction of the X axis in the drawing, and the clamp support members 27a and 27b of the film transport device 20 are separated from the width of the tire molded body T. Thus, the drawn film 42a is held by the clamps 28a and 28b. At this time, the clamp 28a holds the vicinity of the leading end of the film 42a on the drawing side.

  After the clamps 28a and 28b hold the film 42a, the clamp 43b of the film drawing device 43 releases the holding of the film 42a, and the film roll 42 of the portion held by the clamp 28b of the film 42a is made a predetermined length by a cutting means (not shown). Cut (see FIG. 2C). After cutting, the cart (not shown) of the film drawing device 43 is slightly retracted in the X-axis direction, the clamp 43b is retracted to the original position, and the tip of the cut film 42a is held again.

Thus, after supplying the film 42a of a predetermined length to the film transport apparatus 20, the film transport apparatus 20 is moved in the Y-axis direction to transport the film 42a into the center hole of the tire molded body T (see FIG. 1). ).
The length of the cut film 42a is approximately the same as the inner surface width of the product tire. In the illustrated example, the shape of the cut film 42a is rectangular in plan view, but may be other shapes such as rhombus. Moreover, when the film 42a has a corner | angular part, the corner | angular part may be acute angle shape or R chamfering shape.

  In the present embodiment, the film transport apparatus 20 includes two clamps 28a and 28b. However, one end of the film 42a may be held by using one clamp. In this case, the film 42a is conveyed into the center hole of the tire molded body T without cutting the film 42a, pressed against the inner surface of the tire molded body T, and then cut.

Next, a procedure for arranging the film 42a conveyed in the center hole of the tire molded body T shown in FIG. 1 on the inner surface of the tire molded body T by the film pressing device 30 will be described.
FIG. 4 is a perspective view showing a part of the procedure for disposing the film 42a on the inner surface of the tire molded body T. FIG. 4A shows a state in which the film 42a is conveyed into the center hole of the tire molded body T. 4B shows a state in which the film 42a is pressed against the inner surface of the tire molded body T, and FIG. 4C shows a state in which a plurality of films 42a are stacked on the inner surface of the tire molded body T.

First, when placing the film 42a inside the tire molded body T, the center between the clamps 28a and 28b in a state where the film 42a cut into a predetermined length is held by the clamps 28a and 28b of the film transport device 20, The film 42a is conveyed into the center hole of the tire molded body T so as to be positioned at a substantially central portion in the width direction of the tire molded body T (see FIG. 4A). At this time, the roller 39 is positioned above the film 42a.
The angle at which the arm 26 of the film transport apparatus 20 is inserted into the center hole of the tire molded body T is arranged such that the film 42a transported by the film transport apparatus 20 intersects the equator plane of the tire molded body T. Any angle can be used.

Next, the screw arm 36 shown in FIG. 1 is rotated to move the roller arm 38 and the roller 39 downward, and the film 42a is pressed against the inner surface of the tire molded body T as shown in FIG. 4B. At this time, the clamp support members 27a, 27b and the clamps 28a, 28b are both a predetermined distance in the width direction central portion side of the tire molded body T, that is, in a direction approaching each other (the extent that the clamps 28a, 28b do not contact the roller 39). The film 42a held by the clamps 28a and 28b is loosened, and when the roller 39 presses the film 42a against the inner surface of the tire molded body T, no tension is applied to the film 42a. Suppresses elongation.
When the roller 39 presses a part of the film 42a against the inner surface of the tire molded body T, the clamps 28a and 28b release the holding of the film 42a and move the film conveying device 20 to move the clamp support members 27a and 27b and the clamps 28a, 28b is taken out from the center hole of the tire molded body T and returned to the original position (position where the film 42a is supplied).

Subsequently, the screw rods 34 and 36 shown in FIG. 1 are rotated, and the roller 39 is moved along the inner surface of the tire molded body T (in the direction of the arrow in FIG. 4B), and the film 42a is moved to the inner surface of the tire molded body T. Press to place.
In this embodiment, since the final pressure bonding of the film 42a to the inner surface of the tire molded body T is performed by a vulcanization bladder, the film 42a may be pressed to the extent that the film 42a is not peeled off from the tire molded body T. In addition, some wrinkles may occur in the film 42a disposed on the inner surface of the tire molded body T.

  After the placement of the film 42a on the inner surface of the tire molded body T is completed, the tire molded body holder 10 adds the film 42a to be disposed next to the inner surface of the tire molded body T to the film 42a disposed on the inner surface of the tire molded body T. The tire molded body T is subtracted from the width of the film 42a (the length in the tire circumferential direction of the film 42a) by the length of the portion where the films overlap (joint portion) so that the predetermined length can be overlaid. Rotate.

The above steps are repeated to cover the entire surface of the tire molded body T with a film, complete the placement of the film 42a on the entire surface of the tire molded body T, and form a film layer (film inner liner on the inner surface of the tire molded body T. Forming an inner surface layer).
In addition, the broken line part of the film 42a shown to FIG. 4C shows the edge part of the film 42a located in the lower side of the overlapped film 42a.

As described above, the inner liner of tires of various sizes can be formed by attaching the edge of the film 42a having the same width to the entire inner surface of the tire molded body T while overlapping in the width direction. The stock space of members can be reduced, and management can be performed easily.
Further, in this embodiment, since the raw tire is molded without shaping the film 42a, the expansion of the film 42a is only caused when the raw tire is vulcanized, and the film 42a expands only about 2%. .
Therefore, the crack and peeling due to the above-described non-uniformity of the raw tire and the concentration of stress on the joint portion, which are caused by expanding the inner liner having the joint portion between the films 42a, can be suppressed.
In addition, since a thermoplastic resin film that is lighter than the rubber material is used for the inner liner, the weight of the product tire is reduced compared to the case where a rubber material is used for the inner liner, and thus the fuel consumption of the automobile. In addition to benefits such as improvement, there is less air leakage and a longer life is possible.

  The narrower the width of the film 42a (the length in the tire circumferential direction) placed on the inner surface of the tire molded body T, the better it can be attached in accordance with the curvature of the tire molded body T. It is necessary to increase the number of films 42a to be arranged (specifically, the number of films 42a is 10 or more, particularly the same as the number of inches of the rim diameter (for example, 15 if the tire has a rim diameter of 15 inches). ) It is still easy to stick if it is more than the width). However, if the number of the films 42a to be arranged on the inner surface of the tire molded body T is too large, the tact time (working time) for arrangement increases and the productivity decreases. Therefore, it is preferable to adjust the width of the film 42a so that the number of the films 42a disposed on the inner surface of the tire molded body T is five or more or half the number of inches of the rim diameter.

  Further, since the film 42a hardly expands as described above, the joint amount of the film 42a (the tire circumferential direction length of the portion where the films 42a overlap with each other) is specially increased in order to suppress peeling of the joint portion. There is no need, as long as the films 42a overlap. Further, the joint amount in the tire width direction may not be constant. That is, for example, the joint amount may be different between the central portion in the tire width direction and other portions.

The arrangement means according to the present embodiment described above is a film pressing device using the roller 39, but may be anything as long as the film 42a can be arranged on the inner surface of the tire molded body T, such as a bladder. . In the present embodiment, the roller 39 is moved along the inner surface of the tire molded body T by rotating the screw rods 34 and 36 by a servo motor. However, the roller 39 is moved by another drive mechanism such as a cylinder mechanism. It may be driven. If the roller 39 and the roller arm 38 are connected via a spring, the pressing force transmitted from the roller arm 38 to the roller 39 can be adjusted to be constant.
Moreover, the said film 42a stuck on the inner surface of the tire molded object T which concerns on this embodiment can also be used together with a rubber-made inner liner.

It is a front view which shows a tire molded object holder and a film pressing apparatus. It is a perspective view which shows a film conveyance apparatus and a film supply apparatus. It is a figure explaining the procedure which supplies a film to a film conveyance apparatus from a film supply apparatus, FIG. 3A is the state which pulled out the film from the film roll, FIG. 3B is the state which hold | maintained the pulled film with the clamp of a film conveyance apparatus FIG. 3C shows a state in which the film is cut from the film roll. FIG. 4A is a perspective view showing a part of the procedure for placing the film against the inner surface of the tire molded body, and FIG. 4A is a state in which the film is conveyed into the center hole of the tire molded body, and FIG. FIG. 4C shows a state in which a plurality of films are stacked on the inner surface of the tire molded body T while being pressed against the inner surface of the molded body. FIG. It is sectional drawing which shows the structure of the conventional pneumatic tire. It is a figure which shows the state which affixed the film-like sheet | seat on the tire shaping | molding drum in order to shape | mold the conventional inner liner, FIG. 6A is a schematic top view of the tire shaping | molding drum which affixed the film-like sheet, FIG. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Film inner liner sticking apparatus, 10 ... Tire molded object holder, 11 ... Press part, 11a ... Contact part, 20 ... Film conveying apparatus, 22 ... Cart, 23. ..Slide plate, 24, 32 ... post, 26 ... arm, 27a, 27b, 43a ... clamp support member, 28a, 28b, 43b ... clamp, 30 ... film pressing device, 31 ... Base, 33, 35 ... Screw rod support, 33a, 35b ... Plate-like member, 33b, 35c ... Side, 35a ... Hook-shaped member, 34, 37 ... Screw杆, 38 ... Roller arm, 39 ... Roller, 40 ... Film supply device, 41 ... Roll axis, 42 ... Film roll, 42a ... Film, 43 ... Film drawer device 72 ... Bead wire 73 ... Carcass, 74 ... Belt layer, 75 ... Tread part, 76 ... Side wall rubber, 77 ... Inner liner, 82a ... Tip part, 82b ... Rear end part , 82c ... overlapping portion.

Claims (7)

A method for producing an unvulcanized tire comprising a film layer made of a plurality of films of a predetermined length on the inner surface of a molded tire,
A step of holding the molded tire,
Transporting the film into the center hole of the tire molded body;
Arranging the conveyed film in a direction intersecting with the equator plane of the molded tire,
And the step of placing the next film on the inner surface of the tire molded body by overlapping the arranged film and the edges,
A method for producing an unvulcanized tire, wherein the film is formed by disposing the film over the entire surface of the molded tire. In the manufacturing method of the unvulcanized tire described in Claim 1,
The arranging step is a step of pressing the film against the inner surface of the molded tire without stretching the film. In the method for producing an unvulcanized tire according to claim 1 or 2,
After the step of disposing the conveyed film in a direction crossing the equator plane of the tire molded body, the method further comprises the step of rotating the tire molded body by a predetermined amount in the circumferential direction. Method. An apparatus for producing an unvulcanized tire comprising a film layer composed of a plurality of films of a predetermined length on the inner surface of a tire molded body,
Tire molded body holding means for holding the tire molded body;
Film transport means for transporting the film into the tire molded body central hole;
Arranging means for arranging the film conveyed in the tire molded body central hole in the direction intersecting the equator plane on the inner surface of the tire molded body,
An apparatus for producing an unvulcanized tire, wherein a film layer is formed by arranging the film on the entire inner surface of the molded tire with the edges thereof overlapped with each other. In the unvulcanized tire manufacturing apparatus according to claim 4,
The tire molded body holding means includes a rotating means for rotating a held tire molded body by a predetermined amount in the tire circumferential direction. In the unvulcanized tire manufacturing apparatus according to any one of claims 4 and 5,
The film conveying means has a holding means for holding one or both ends of the film, a moving means for moving the holding means, and a guide member for guiding the holding means when moving,
When the placement means places the film on the inner surface of the tire molded body, the holding means is moved toward the center in the tire width direction so as to press against the inner surface of the tire molded body without applying tension to the film. An apparatus for producing an unvulcanized tire, characterized in that In the unvulcanized tire manufacturing apparatus according to any one of claims 4 to 6,
The said arrangement | positioning means is a roller arrange | positioned inside the said tire molded object, The said roller is connected with the drive mechanism via the flexible arm, The manufacturing apparatus of the unvulcanized tire characterized by the above-mentioned.

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