JP2005271411A - Method and apparatus for winding strip-like material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strip-like material winding method capable of shortening a cycle time by performing the assembling of the strip-like material by a separate process, capable of enhancing molding productivity and enabling inexpensive equipment by a simple constitution, and a strip-like material winding apparatus. <P>SOLUTION: A pair of left and right bead lock drums 2a and 2b with bladders equipped with bead lock mechanisms 1 are supported on the main shaft 3a of a molding machine in a freely rotatable manner and turn-up bladders 4a and 4b are installed outside the bead lock drums 2a and 2b constituted in an expansible and contractible manner. A material supply device 5 for supplying a strip-like material W such as side members or the like to the bead lock drums 2a and 2b is installed on the lateral part of the bead lock drums 2a and 2b, and a press tool attaching and detaching device 7, which is detachably holding a magnetizing member 6 comprising a strip-like magnet or the like for pressing the leading end part Wa of the strip-like material W supplied from the material supply device 5 to the bead lock drums 2a and 2b, and a cutting means 8 such as a cutter or the like for cutting the strip-like material W at one circle length position are installed in the vicinity of the bead lock drums 2a and 2b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for winding a belt-shaped material and an apparatus therefor, and more specifically, by performing side member assembly in a separate process, the cycle time can be shortened and the molding productivity can be improved. The present invention relates to a winding method and an apparatus therefor.

  Generally, in a method for molding a tire for a passenger car, a first green tire (first unvulcanized tire) molded by a molding machine in a first molding process is assembled and molded into a finished green tire by a molding machine in a second molding process. A step method and a full-step molding method for assembling the final green tire with one molding machine from the beginning are performed.

  In the first molding step, members such as an inner liner, a carcass, a bead and a filler, and a side are molded on the first molding drum, and in the second molding step, the bead portion of the first green tire is a bead of the second molding drum. It locks with a locking mechanism and expands in a toroidal shape, forming a belt, jointless, and tread to form the final green tire.

  However, at the time of side-over tire molding, for example, as shown in FIGS. 7A to 7E, after the inner liner 22 and the carcass 23 are wound on the first molding drum 21 in the first molding step. The bead 24 is driven into both sides, and the carcass 23 is turned up by a turn-up bladder (not shown) and folded while wrapping the bead 24 (see FIGS. 7A and 7B). Then, the side member 25 (sidewall, rim cushion, etc.) is wound and pasted on the terminal portion of the folded carcass 23. At this time, the side member 25 (sidewall, rim cushion, etc.) in the second molding step. Etc.), a method of interposing a release film 26 such as polyethylene between the carcass 23 and the side member 25 is employed.

  Further, as shown in FIGS. 7C to 7E, the first green tire W mounted on the second forming drum in the second forming step is inflated in a bead-locked state by the bead lock mechanism 28, and the belt and tread. 27, when the side member 25 is rolled and the release film 26 is removed, the belt and the tread 27 are assembled while the side member 25 is rolled, and the side member 25 is raised again and pressed. Crimp by means.

  However, as described above, after assembling the belt and the tread 27 on the first green tire W in the second molding step, the side member 25 is rolled, the release film 26 is removed, and then the side member 25 is raised and pasted. As a result, there is a problem that the assembly accuracy is deteriorated, the members are deformed and distorted, and much labor and time are required, which greatly impairs the productivity of the tire.

  As a countermeasure to solve such problems, a method of sticking the side member in the second molding step, such as an annular side sticking method, or assembling the green tire in a state where the diameter of the green tire is expanded in a toroidal shape, A method of pasting with a side member pasting apparatus has been proposed (see, for example, Patent Document 1).

  However, in the method of sticking the side member in the second molding process, it is necessary to stick the rim cushion to the bead part in the first molding process, which increases the man-hours for assembly and improves the assembly accuracy by sticking to the curved surface. There was a problem.

Further, in the method of pasting with another side member pasting device, the tire assembly with the side member pasted must be removed from the side member pasting device and transferred to the second molding drum in the second molding step. There have been problems such as deformation of the outer diameter of the vulcanized tire assembly, generation of cracks and wrinkles, and deterioration in assembly accuracy. Further, the method of prepacking the vulcanizer has a problem that the apparatus is large and expensive equipment is required.
JP-A-6-254990

  The present invention pays attention to such conventional problems, and by assembling the belt-like material in a separate process, the cycle time can be shortened, the molding productivity can be improved, and the structure is simple and inexpensive. An object of the present invention is to provide a method and an apparatus for winding a belt-shaped material that can be used as a simple facility.

  In order to achieve the above object, the present invention achieves the above-described method for winding a belt-shaped material from a material supply device on a pair of left and right beadlock drums having a beadlock mechanism inside a turn-up bladder. The leading end of the belt-shaped material is pressed by a holding jig removing device, and is adsorbed to the drum end surface by a magnetic adhesion member fixed to the pressing jig to hold the leading end of the belt-shaped material, and the bead lock drum is rotated to rotate the band-shaped material. Is cut by a cutting means at the position of one circumferential length portion, and is bonded by a pressure bonding means in a state in which the end portion of the band-shaped material is abutted, and a bead is attached at the first bonding position of the front end portion of the band-shaped material. The gist is to stop the rotation of the lock drum and to remove the presser jig from the bead lock drum by the presser jig attaching / detaching device.

  Thus, by assembling the strip material in a separate process, the cycle time can be shortened and the molding productivity can be improved.

  The belt-shaped material winding device according to the present invention also includes a bead lock drum with a pair of left and right bladders provided with a bead lock mechanism inside the turn-up bladder, and a tip of the belt-shaped material supplied from the material supply device. The gist of the present invention is that it is composed of a holding jig detaching device that detachably holds a magnetic adhesion member that is pressed onto the lock drum, and a cutting means that cuts at the position of one circumferential length portion of the belt-like material.

  Here, the holding jig detaching device is constituted by a holding jig that can be moved forward and backward to detachably hold the magnetic adhesion member, and the bead lock mechanism detachably holds the bead portion of the green tire. It is a concave beadlock member.

  In this way, since it is a simple configuration composed of a pair of left and right bladder-equipped bead lock drums equipped with a bead lock mechanism and a presser jig detachment device that detachably holds a magnetic adhesion member, complicated equipment and It can be manufactured at low cost.

Since the present invention is configured as described above, the following excellent effects can be obtained. (a) By assembling the belt-like material in a separate process, the cycle time of the first molding process and the cycle time of the second molding process can be shortened, and the molding productivity can be improved.
(b). It becomes easy to form a tire with a super flat tire specification.
(c). It becomes easy to meet the gum finish specification in two-step molding.
(d) Since the apparatus has a simple configuration, it can be made inexpensive.

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

  FIG. 1 is a front view showing a use state of a winding device for carrying out a method for winding a strip material in the second forming step of the present invention, FIG. 2 is a partially enlarged front view of the winding device, and FIG. 2 is a side view of FIG. 2, FIG. 5 is an enlarged cross-sectional view of the bead lock drum, and bead lock drums 2a and 2b with a pair of left and right bladders equipped with a bead lock mechanism 1 are formed. Turn-up bladders 4a and 4b are installed outside the bead lock drums 2a and 2b that are rotatably supported by the main shaft 3 of the machine and configured to be able to expand and contract. 3x indicates a carriage.

  On the side portions of the bead lock drums 2a and 2b, a material supply device 5 capable of advancing and retreating is provided on the bead lock drums 2a and 2b. The bead lock drums 2a and 2b are capable of advancing and retracting. Is a holding jig for detachably holding a magnetized member 6 made of a band-shaped magnet or the like that presses the leading end Wa of the band-shaped material W supplied from the material supply device 5 onto the bead lock drums 2a and 2b. A detaching device 7 and a cutting means 8 such as a cutter for cutting at the position of one circumferential length portion of the belt-like material W are installed.

  The holding jig detaching device 7 includes a holding jig 9 that can be moved forward and backward to detachably hold the magnetic member 6, and end portions of the belt-like material W are pasted on both sides of the holding jig detaching device 7. Crimping means 10a and 10b such as rollers that can be moved forward and backward and that can move horizontally are installed.

  The bead lock mechanism 1 is configured by a bead lock member 1a having a concave cross section that detachably holds the bead portion Ga of the green tire G, and the bead into which the green tire G molded in the first molding step has been inserted. The portion Ga is configured to be clamped or unclamped by the bead lock member 1a.

  Next, a method for winding the band-shaped material W using the above-described winding apparatus will be described with reference to FIGS. 5 and 6A to 6E.

  First, as shown in FIG. 6A, the material supply device 5 is moved forward on a pair of left and right bead lock drums 2a and 2b having a bead lock mechanism 1 inside the turn-up bladders 4a and 4b. When the belt-like material W (in this embodiment, a side member) is supplied from 5, the tip end portion Wa of the belt-like material W is pressed by the magnetizing member 6 fixed to the presser jig 9 of the presser jig detaching device 7. 6, the tip end portion Wa of the belt-like material W is adsorbed and held on the end surfaces on the bead lock drums 2 a and 2 b.

  In this state, as shown in FIG. 6 (b), the magnetizing member 6 is separated from the presser jig 9 and the presser jig detaching device 7 is retracted, and the leading end portion of the band-shaped material W is moved by the magnetized member 6. The bead lock drums 2a and 2b are rotated by a predetermined angle while holding Wa, and the belt-like material W is drawn out from the material supply device 5 and wound around the bead lock drums 2a and 2b. The band-shaped material W is automatically cut by the cutting means 8 such as a cutter at the position.

  Then, as shown in FIG. 6C, the rear end side of the belt-shaped material W is wound while the bead lock drums 2a and 2b are further rotated, and the bead lock drum is used at the first application position of the front end portion Wa of the belt-shaped material W. While stopping rotation of 2a, 2b, the material supply apparatus 5 is retracted.

  Thereafter, the bead lock is performed at the stage where the end of the belt-shaped material W is completed by the automatic or manual bonding by the pressure bonding means 10a, 10b such as a roller in a state where the terminal of the belt-shaped material W is abutted. In the drums 2a and 2b, the magnetic adhesion member 6 holding the tip end portion Wa of the belt-like material W is gripped by the holding jig 9 of the holding jig removing device 7 and removed from the bead lock drums 2a and 2b and moved backward. (See FIG. 6D).

  In addition, it is preferable to correct the position of the magnetic attachment member 6 attached to the holding jig 9 of the holding jig removing apparatus 7 in order to prevent the accumulated position from being displaced.

  In this way, after the belt-shaped material W is wound around the bead lock drums 2a and 2b, the holding device (not shown) holds the bead lock drum while gripping the tread portion of the green tire G without the belt-shaped material W (side member). The green tire G is inserted by moving from the axial direction of 2a, 2b, and the green tire G is held at the center of the bead lock drums 2a, 2b. Clamp the side edges with. Next, air is supplied to the turn-up bladders 4a and 4b, and the side portions of the band-shaped material W are turned up and pasted. After that, after applying a side stitcher, the finished green tire G is removed from the bead lock drums 2a and 2b by the holding device and conveyed to the next step.

  Thus, by assembling the strip material in a separate process, the cycle time can be shortened and the molding productivity can be improved.

It is a front view which shows the use condition of the winding apparatus for enforcing the winding method of the strip | belt-shaped material in the 2nd shaping | molding process of this invention. It is a partially expanded front view of a winding apparatus. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a side view of FIG. 2. It is an expanded sectional view of a bead lock drum. (A)-(d) is process explanatory drawing of the winding method of the strip | belt-shaped material W. FIG. (A)-(e) is process explanatory drawing of the shaping | molding method of the conventional tire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bead lock mechanism 1a Bead lock member 2a, 2b Bead lock drum 3x Carriage 3 Spindle 4a, 4b Turn-up bladder 5 Material supply device 6 Magnetic attachment member 7 Holding jig removal apparatus 8 Cutting means 9 Holding jig 10a, 10b Crimping means W band-shaped material Wa tip of band-shaped material G green tire Ga bead part 21 first molding drum 22 inner liner 23 carcass 24 bead 25 side member 26 release film 27 belt, tread 28 bead lock mechanism

Claims (4)

A magnetized member that holds the tip of the belt-shaped material supplied from the material supply device onto the pair of left and right beadlock drums equipped with a beadlock mechanism inside the turn-up bladder, and presses it with a presser jig detachment device, and fixes it to the presser jig. Is held by the drum end surface to hold the tip of the belt-like material, and the bead lock drum is rotated to wind the belt-like material, and cut by cutting means at the position of the one circumference length of the belt-like material. In the state where the terminal portion is abutted, it is pasted by a crimping means, and the rotation of the bead lock drum is stopped at the first pasting position of the front end portion of the belt-like material, and the presser jig is attached to the bead lock drum by the presser jig detaching device. A method for winding a belt-shaped material, characterized in that it is removed from the belt. A beadlock drum with a pair of left and right bladders equipped with a beadlock mechanism inside the turn-up bladder and a magnetic attachment member that presses the tip of the belt-shaped material supplied from the material supply device onto the beadlock drum are detachably held. An apparatus for winding a belt-shaped material, comprising: a holding jig attaching / detaching device for cutting; and a cutting means for cutting at a position of one circumferential length portion of the belt-shaped material. The belt-shaped material winding apparatus according to claim 2, wherein the presser jig detaching device is configured by an advanceable / retractable presser jig that detachably holds the magnetic adhesion member. 4. The belt-shaped material winding device according to claim 2, wherein the bead lock mechanism is a bead lock member having a concave cross section that detachably holds a bead portion of a green tire. 5.

Images