JP2001277377A - Tire molding method and transfer device used in this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire molding method by which product precision is upgraded by mitigating the deformation distortion of a carcass cord and a molding cycle is shortened to enhance the productivity as well as a transfer device using this molding method. SOLUTION: The transfer device 5 is of such a constitution that an inner ring 10 is internally mounted in an annularly formed slide ring member 8 of a U-section, in a freely rotatable manner, through a positioning guide roller 9 and the inner ring 10 is driven to rotate by a rotary drive device 11 installed on the outer peripheral face of the slide ring member 8. In addition, a gripping/ fixing member 16 which grips and fixes or opens the outer peripheral face of a laminate 4 of the slide ring members 8, is provided on the inner face side of the inner ring 10 through a switching mechanism 15. The gripping/fixing member 16 is constituted of a slide segment 17 and a slide cone 18 which slides into contact with an inclined face 17a formed on the slide segment 17 through an intermediate member 17b in the horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a tire and a transfer apparatus used for the method, and more particularly, to a shaping bladder-less second-stage molding apparatus for reducing deformation of a carcass cord without impairing productivity. The present invention relates to a tire molding method capable of greatly reducing the molding cycle and a transfer device used for the molding method.

[0002]

2. Description of the Related Art Conventionally, a transfer apparatus in a shaping bladderless second molding stage in a tire molding process has a toroidal shape by holding an outer peripheral surface of a laminate of a belt member and a tread member molded in another molding stage. It is the center of the device function to convey to the outer peripheral surface of the carcass member that has been shaped into, after joining and joining the members of the laminate and the carcass member, when the laminate is stitched by a rotating roller to be joined, The function of the transfer device was not particularly required.

[0003] Therefore, the transfer device is configured to return to the original position again after transporting the laminate on the outer peripheral surface of the carcass member.

[0004]

However, when the carcass member and the laminate are united and stitched by a rotating roller, the circumferential inertia force between the bead portion and the laminate located at the outer diameter portion, In addition, there is a problem in that deformation of the carcass cord is generated due to shearing force in the circumferential direction during stitching, resulting in defective products and impairing productivity.

[0005] In order to eliminate such deformation of the carcass cord, there is a means for reducing the external load and increasing the rigidity of the carcass member. However, air traps may be newly generated between the member and the tread, There has been a problem that an obstacle such as a change in the outer peripheral length occurs, and various restrictions are imposed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tire molding method and a molding method capable of reducing the deformation distortion of a carcass cord to improve product accuracy, shortening a molding cycle, and improving productivity. An object of the present invention is to provide a transfer device used for the above.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tire molding method comprising: a pair of bead lock drums provided on a pair of axially movable main shafts; Fix the attached bead part,
After shaping the carcass member into a toroidal shape, the laminate of the members molded by another molding stage is transported to the outer peripheral surface position of the carcass member by a transfer device, and the laminate is pressed and held on the outer peripheral surface of the carcass member. In this state, at the time of stitching the laminate, while rotating the carcass material by rotating at least one of the main shaft and the ring member of the transfer device by a stitching roller, the laminate is applied to the outer peripheral surface of the carcass material. The main point is to perform stitching along.

The transfer apparatus used in the tire molding method of the present invention holds an outer peripheral surface of a laminate of members molded by another molding stage and transports the laminated body to an outer peripheral surface of a toroidally shaped carcass member. A movable transfer device, wherein the transfer device is provided with an inner ring rotatably mounted via a rotation driving device inside a ring-shaped slide ring member, and an inner surface of the inner ring is opened and closed. The gist of the present invention is to provide a gripping / fixing member capable of gripping / fixing or releasing the outer peripheral surface of the laminate of members via a mechanism.

The gripping and fixing member and the opening and closing mechanism include:
A slide segment that abuts the outer peripheral surface of the laminate, a slide cone that slidably contacts the inclined surface formed on the slide segment from the horizontal direction, and presses the slide segment against the outer peripheral surface of the laminate, and the slide cone is horizontally moved. And a reciprocating moving means.

According to the present invention, a laminate of members molded by another molding stage is conveyed to a position of an outer peripheral surface of a carcass member shaped as a toroidal member by another transfer stage, and an outer periphery of the carcass member is formed. In a state where the laminate is pressed and held on the surface, at the time of stitching the laminate, the laminating is performed while rotating at least one of the main shaft and the ring member of the transfer device by a stitching roller to rotate the carcass material. Since the body is stitched along the outer peripheral surface of the carcass material, the deformation distortion of the carcass cord can be reduced and the product accuracy can be increased, and the molding cycle can be shortened and the productivity can be improved. is there.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a shaping bladderless second molding stage in a tire molding process embodying the present invention, and FIG. 2 is a partially enlarged cross-sectional view of a transfer device at a portion A in FIG. A pair of bead lock drums 2a and 2b are detachably mounted on the main shafts 1a and 1b which are drivable and relatively movable in the axial direction, at a predetermined interval.

The bead lock drums 2a and 2b have bead portions 3 mounted on both ends of a carcass member W, and after shaping the carcass member W, the bead lock drums 2a and 2b are positioned on the outer peripheral surface of the carcass member W. Then, the stacked body 4 of the belt member 4a and the tread member 4b formed in another forming stage is transported by the transfer device 5, and the outer peripheral surface of the carcass member W and the stacked body 4 are pressed and held.

In this state, when the stack 4 is stitched by the stitching roller 6, at least one of the main shafts 1a and 1b and a ring member of a transfer device 5 to be described later is rotated to drive the carcass material. While rotating W, the laminate 4 is carcass material W
The stitching is performed along the outer peripheral surface of the carcass cord, thereby reducing the deformation distortion of the carcass cord and increasing the product accuracy.

In this embodiment, the spindles 1a, 1b
Is rotatable via the bearing 7 and the carcass material W is rotated by rotating the ring member of the transfer device 5. However, the present invention is not limited to this embodiment.
At the same time as the main shafts 1a and 1b are driven to rotate, the ring members of the transfer device 5 can be driven to rotate synchronously.

Next, the structure of the transfer device 5 will be described in detail with reference to FIG. 2. The inside of a ring-shaped slide ring member 8 having a U-shaped cross section is provided with a positioning guide roller 9 therebetween. The inner ring 10 is rotatably mounted inside, and the inner ring 10 is configured to be rotationally driven by a rotation driving device 11 installed on the outer peripheral surface of the slide ring member 8.

The rotary drive unit 11 includes pinions 12 and 13 connected to a drive motor (not shown), and a rack 14 fixed to the outer peripheral surface of the inner ring 10 meshing with the pinion 13. Are driven to rotate, so that the inner ring 10 rotates at a predetermined speed.

On the inner surface side of the inner ring 10, there is provided a holding member 16 which can hold or open the outer peripheral surface of the laminated body 4 of the members via an opening / closing mechanism 15. The slide segment 17 having a triangular cross-section and abutting horizontally on the outer peripheral surface of the laminate 4 and the inclined surface 17a formed on the slide segment 17 are slidably contacted from the horizontal direction via an intermediate member 17b, and the slide segment 17 is laminated. A slide cone 18 having a triangular cross section is pressed against the outer peripheral surface of the body 4, and the slide cone 18 reciprocates in a horizontal direction by moving means 19.

The moving means 19 in this embodiment is composed of a screw shaft 20 fixed to the side surface of the slide cone 18 and a rotating body 21 screwed on the screw shaft 20. By rotating by driving, the screw shaft 20 slides in the horizontal direction. As a result, the slide cone 18 moves in the horizontal direction, and the horizontal pressing force P is applied to the inclined surface 17a formed on the slide segment 17 by the inclined surface 18a of the slide cone 18 via the intermediate member 17b. 4 is transmitted so as to be changed in a direction orthogonal to the outer peripheral surface.

Thus, the outer peripheral surface of the laminate 4 mounted on the outer peripheral surface of the carcass material W is gripped and fixed, and the carcass material W is turned in this state, and the laminated body 4 is stitched by the above-described stitching roller 6. To do that.

As described above, in the embodiment of the present invention,
The laminated body 4 of the member molded by another molding stage is transported by the transfer device 5 to the outer peripheral surface position of the carcass member W shaped in a toroidal shape, and the laminated body 4 is pressed and held on the outer peripheral surface of the carcass member W. When the carcass material W is rotated by rotating at least one of the main shafts 1a and 1b and the inner ring member 10 of the transfer device 5 by the stitching roller 6 during the stitching of the laminate 4 in the Since the body 4 is stitched along the outer peripheral surface of the carcass material W, the deformation distortion of the carcass cord can be reduced, the product accuracy can be improved, and the molding cycle can be shortened.

[0022]

Since the present invention is configured as described above, it has the following excellent effects. (a). By providing the transfer device with the rotation and drive functions, the deformation of the carcass line is reduced, and the amount of deformation can be reduced to 1/8 or less of the conventional case. (b). During stitching, by stabilizing the outer peripheral length of the tire, the carcass line can be bonded and pressed to the laminate of members without worrying about the obstacle of the outer peripheral length. Can be narrowed, and the molding cycle can be shortened. (c) .When removing the finished green tire, stitching can be performed while holding the green tire itself with the transfer device, eliminating the need for the conventional transfer device moving and gripping cycles, thus shortening the cycle. , And productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a shaping bladderless second molding stage in a tire molding process embodying the present invention.

FIG. 2 is a partially enlarged cross-sectional view of a transfer device in a portion A of FIG. 1;

[Explanation of symbols]

1a, 1b Main shaft 2a, 2b Bead lock drum 3 Bead portion 4 Laminated body 4a Belt member 4b Tread member 5 Transfer device 6 Stitching roller 7 Bearing 8 Slide ring member 9 Positioning guide roller 10 Inner ring 11 Rotary drive device 12, 13 Pinion 14 Rack 15 Opening / closing mechanism 16 Holding / fixing member 17 Slide segment 17a Inclined surface 17b Intermediate member 18 Slide cone 19 Moving means 20 Screw shaft 21 Rotating body W Carcass material

Claims (6)

[Claims] 1. A carcass member comprising: a pair of bead lock drums provided on a pair of main shafts movable in an axial direction; fixing bead portions mounted on both ends of a carcass member; shaping the carcass member in a toroidal shape; In the outer peripheral surface position, the laminate of the members molded in another molding stage is conveyed by a transfer device, and the laminate is pressed and held on the outer peripheral surface of the carcass member. A tire forming method wherein a stitching roller stitches the laminate along an outer peripheral surface of the carcass material while rotating the carcass material by rotating at least one of a main shaft and a ring member of a transfer device. 2. The carcass material is rotated by synchronizing the main shaft with a ring member of a transfer device.
3. The tire molding method according to item 1. 3. A transfer device capable of holding an outer peripheral surface of a laminated body of members molded by another molding stage and transporting the laminated body to an outer peripheral surface of a carcass member shaped in a toroidal shape, wherein the transfer device comprises: The apparatus includes an inner ring rotatably mounted inside a ring-shaped slide ring member via a rotation drive device, and an inner surface side of the inner ring, and an outer peripheral surface of a laminated body of members through an opening / closing mechanism. A transfer device for use in a tire molding method provided with a gripping / fixing member that can be gripped or opened. 4. The transfer device according to claim 3, wherein a positioning guide roller is provided between the slide ring member and the inner ring. 5. The transfer apparatus according to claim 3, wherein the rotary drive device includes a pinion connected to a drive motor, and a rack fixed to an inner ring. 6. The gripping / fixing member and the opening / closing mechanism are configured to slidably contact a slide segment in contact with an outer peripheral surface of the laminated body and an inclined surface formed in the slide segment from a horizontal direction, and to move the slide segment to an outer peripheral surface of the laminated body. 6. The transfer device used in the method for forming a tire according to claim 3, comprising a slide cone for pressing the slide cone and a moving means for reciprocating the slide cone in a horizontal direction.