JP4386536B2 - TIRE MOLDING METHOD AND TRANSFER DEVICE USED FOR THE MOLDING METHOD - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire molding method and a transfer device used for the molding method. More specifically, in a shaping bladderless second-stage molding device, the deformation of the carcass cord is greatly reduced without impairing the productivity, and the molding cycle. The present invention relates to a tire molding method and a transfer device used in the molding method.
[0002]
[Prior art]
Conventionally, a transfer device in a shaping bladderless second-stage molding stage in a tire molding process is a carcass shaped in a toroidal shape by holding the outer peripheral surface of a laminated body of a belt member and a tread member molded in another molding stage. It is the center of the device function that conveys to the outer peripheral surface of the member, and when the laminated body is stitched by the rotating roller and united after joining the carcass member, the function of the transfer device is It was not particularly needed.
[0003]
Therefore, the transfer device is configured to return to the original position again after the laminated body is conveyed onto the outer peripheral surface of the carcass member.
[0004]
[Problems to be solved by the invention]
However, when the carcass member and the laminated body are combined and stitched by a rotating roller, the inertial force in the circumferential direction between the bead portion and the laminated body located at the outer diameter portion, and the circumferential shear during stitching Due to the force, there is a problem that the carcass cord is deformed and deformed to cause a product defect or deteriorate productivity.
[0005]
In order to eliminate the deformation distortion of the carcass cord, there is a means to reduce the external load and increase the rigidity of the carcass member. However, a new air trap occurs between the member and the tread, and the outer peripheral length is reduced. There has been a problem that a failure such as a change has occurred and various restrictions have been imposed.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a tire molding method capable of reducing the deformation distortion of the carcass cord and improving the product accuracy, shortening the molding cycle, and improving the productivity, and the transfer used in the molding method. To provide an apparatus.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the tire molding method according to the present invention fixes a bead portion mounted on both ends of a carcass member to a pair of bead lock drums provided on a pair of main shafts movable in an axial direction. After shaping the carcass member in a toroidal shape, the laminated body of the members molded at the other molding stage is conveyed to the position of the outer peripheral surface of the carcass member by the transfer device , and the transfer device is arranged on the outer peripheral surface of the carcass member. While the laminate is being pressed and held, at the time of stitching the laminate, at least one of the main shaft and the ring member of the transfer device is rotationally driven by a stitching roller to rotate the carcass material, The gist is to stitch along the outer peripheral surface of the material.
[0008]
In addition, the transfer device used in the tire molding method of the present invention is movable to hold the outer peripheral surface of a laminated body of members molded at another molding stage and to convey the outer peripheral surface of a carcass member shaped in a toroidal shape. The transfer device includes a ring-shaped slide ring member that is rotatably provided with an inner ring rotatably provided via a rotary drive device, and an inner side of the inner ring via an opening / closing mechanism. The gist of the present invention is to provide a grip fixing member that can grip and fix the outer peripheral surface of the laminated body of members.
[0009]
As the holding and fixing member and the opening / closing mechanism, a slide segment that contacts the outer peripheral surface of the laminated body and a slide that slides in contact with the inclined surface formed on the slide segment from the horizontal direction and presses the slide segment against the outer peripheral surface of the laminated body. It comprises a cone and moving means for reciprocating the slide cone in the horizontal direction.
[0010]
The present invention is configured as described above and transports a laminated body of members molded in another molding stage to the outer peripheral surface of the carcass member shaped in a toroidal shape by a transfer device, and While the laminate is being pressed and held, at the time of stitching the laminate, at least one of the main shaft and the ring member of the transfer device is rotationally driven by a stitching roller to rotate the carcass material, Since stitching is performed along the outer peripheral surface of the material, the deformation distortion of the carcass cord can be reduced, the product accuracy can be increased, the molding cycle can be shortened, and the productivity can be improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0012]
FIG. 1 is a schematic configuration diagram of a shaping bladderless second-stage molding stage of a tire molding process in which the present invention is implemented, and FIG. 2 is a partially enlarged sectional view of a transfer device in part A of FIG. In addition, a pair of bead lock drums 2a and 2b are detachably attached to the main shafts 1a and 1b, which are relatively movable in the axial direction, at a predetermined interval.
[0013]
The bead lock drums 2a and 2b are fixed with bead portions 3 attached to both ends of the carcass member W. After shaping the carcass member W, the bead lock drums 2a and 2b are moved to other positions on the outer peripheral surface of the carcass member W. The laminated body 4 of the belt member 4a and the tread member 4b molded at the molding stage is conveyed by the transfer device 5, and the outer peripheral surface of the carcass member W and the laminated body 4 are pressed and held.
[0014]
In such a state, when the laminate 4 is stitched by the stitching roller 6, at least one of the main shafts 1a and 1b and a ring member of the transfer device 5 to be described later is rotated to rotate the carcass material W. Thus, the laminate 4 is stitched along the outer peripheral surface of the carcass material W, thereby reducing the deformation distortion of the carcass cord and improving the product accuracy.
[0015]
In this embodiment, the main shafts 1a and 1b are rotatable via the bearings 7 and the ring member of the transfer device 5 is driven to rotate to rotate the carcass material W. However, the present invention is not limited to this embodiment. The main shafts 1a and 1b can be rotationally driven, and at the same time, the ring member of the transfer device 5 can be rotationally driven in synchronization.
[0016]
Next, the configuration of the transfer device 5 will be described in detail with reference to FIG. 2. Inside the slide ring member 8 having a U-shaped cross section formed in an annular shape, an inner ring is interposed via a positioning guide roller 9. 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.
[0017]
The rotational drive device 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 that meshes with the pinion 13, and the drive motor is rotationally driven. As a result, the inner ring 10 rotates at a predetermined speed.
[0018]
On the inner surface side of the inner ring 10, there is provided a grip fixing member 16 that can grip and fix the outer peripheral surface of the laminated body 4 of the members via an opening / closing mechanism 15. 4 is in sliding contact with an inclined surface 17a formed on the slide segment 17 from the horizontal direction via an intermediate member 17b, and the slide segment 17 is attached to the laminated body 4. The slide cone 18 is configured to be pressed against the outer peripheral surface and has a triangular cross section. The slide cone 18 is reciprocated in the horizontal direction by a moving means 19.
[0019]
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, and the rotating body 21 is rotated by a rotational drive (not shown). By doing so, the screw shaft 20 slides in the horizontal direction. Accordingly, 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 configured to change the direction orthogonal to the outer peripheral surface of the transmission.
[0020]
As a result, 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 laminate 4 is stitched by the stitching roller 6 described above. is there.
[0021]
As described above, in the embodiment of the present invention, the laminated body 4 of the members molded at the other molding stage is transported by the transfer device 5 to the position of the outer peripheral surface of the carcass member W shaped in a toroidal shape, and the carcass member W In a state where the laminate 4 is pressed and held on the outer peripheral surface of the laminate 4, at the time of stitching the laminate 4, at least one of the main shafts 1 a and 1 b and the inner ring member 10 of the transfer device 5 is rotationally driven by the stitching roller 6. Since the laminate 4 is stitched along the outer peripheral surface of the carcass material W while rotating the carcass material W, the deformation distortion of the carcass cord can be reduced and the product accuracy can be improved. It can be shortened.
[0022]
【The invention's effect】
Since the present invention is configured as described above, the following excellent effects can be obtained.
(a). By providing the transfer device with a rotation and drive function, the deformation of the carcass line is reduced, and the amount of deformation can be reduced to 1/8 or less compared to the conventional case.
(b). Stabilization of the outer peripheral length of the tire during stitching allows the carcass line to be joined and pressed to the laminated body of members without worrying about obstacles in the outer peripheral length. The required range can be narrowed and the molding cycle can be shortened.
(c) When the finished green tire is taken out, stitching can be performed while the green tire itself is gripped by the transfer device, eliminating the need for moving and gripping cycles of the conventional transfer device and shortening the cycle. , Productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a shaping bladderless second stage molding stage of a tire molding process embodying the present invention.
FIG. 2 is a partially enlarged cross-sectional view of the transfer device in part A of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b Main shaft 2a, 2b Bead lock drum 3 Bead part 4 Laminate 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 Rotation drive device 12, 13 Pinion 14 Rack 15 Opening and 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)

The bead portions mounted on both ends of the carcass member are fixed to a pair of bead lock drums provided on a pair of main shafts that are movable in the axial direction, and the carcass member is shaped in a toroidal shape, and then placed on the outer peripheral surface of the carcass member. The laminate of members molded in another molding stage is transported by a transfer device , and the transfer device holds the laminate on the outer peripheral surface of the carcass member while the laminate is stitched. A tire molding method in which at least one of a main shaft and a ring member of a transfer device is rotationally driven to rotate the carcass material, and the laminate is stitched along the outer peripheral surface of the carcass material by a stitching roller.   The tire molding method according to claim 1, wherein the carcass material is rotated by synchronizing the main shaft and the ring member of the transfer device. A movable transfer device that holds the outer peripheral surface of a laminate of members molded at another molding stage and conveys the outer peripheral surface of a carcass member shaped in a toroidal shape,
The transfer device has an inner ring rotatably mounted inside a ring-shaped slide ring member via a rotation driving device, and an outer periphery of the member stack via an opening / closing mechanism on the inner surface side of the inner ring. A transfer device for use in a tire forming method provided with a grip fixing member capable of gripping and fixing a surface.   The transfer apparatus used for the tire shaping | molding method of Claim 3 which provided the positioning guide roller between the said slide ring member and an inner side ring.   The transfer apparatus used for the tire shaping | molding method of Claim 3 or 4 with which the said rotational drive apparatus was comprised with the pinion connected with the drive motor, and the rack fixed to the inner side ring.   The holding and fixing member and the opening / closing mechanism include a slide segment that contacts the outer peripheral surface of the laminate, and a slide cone that slides in contact with 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. 6. A transfer device for use in a tire molding method according to claim 3, 4 or 5, comprising: and a moving means for reciprocating the slide cone in the horizontal direction.

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