Rubber member molding method and rubber member molding device

Abstract

To provide a method for easily cutting a rubber strip after wound around a molding drum.SOLUTION: A rubber member molding method rotates a molding drum 11 while excluding a rubber strip 12 from an extruder 13, thereby continuously sticks the rubber strip 12 having a predetermined length onto a surface of the molding drum 11, then stops extrusion of the rubber strip 12 from the extruder 13 and rotation of the molding drum 11, and holds the rubber strip 12 by a holding member 20 and rotates the molding drum 11 and cuts the rubber strip 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method and an apparatus for molding a rubber member. [Background technology]

[0002] Conventionally, a method for manufacturing rubber components for tires has been known in which a long unvulcanized rubber strip is spirally wound around a cylindrical building drum (see, for example, Patent Document 1). With this method, rubber components with various cross-sectional shapes can be manufactured by changing the winding position and winding amount of the rubber strip. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-302668 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above method, when the rubber strip has been completely wound around the building drum, it is necessary to cut the rubber strip and separate the rubber strip that has been completely wound around the building drum from the succeeding rubber strip. The cut portion is the rear end of the rubber strip that has been wound around the building drum and also the starting end of the rubber strip that will be next wound around the building drum, so it is necessary for the cut portion to be in a clean state without tears or the like.

[0005] Although it is time-consuming for an operator to perform this cutting, providing a large-scale device for cutting the rubber strip near the building drum complicates the entire facility and is undesirable in terms of maintenance, etc.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a method and an apparatus for easily cutting a rubber strip after it has been wound around a building drum. [Means for solving the problem]

[0007] A rubber member molding method according to an embodiment is a rubber member molding method for molding a rubber member by attaching a rubber strip to a surface of a rotating body, the method comprising the steps of: attaching a tip of the rubber strip to the surface of the rotating body; rotating the rotating body while supplying the rubber strip, thereby continuously attaching a predetermined length of the rubber strip to the surface of the rotating body; and cutting the rubber strip at a position of the predetermined length from the tip, wherein in the step of cutting the rubber strip, rotation of the rotating body is stopped, and the rubber strip is held by a holding member capable of holding the rubber strip. A part of the holding member or a cutting member provided on the holding member is brought into contact with the rubber strip. The rubber strip is cut by rotating the rotor.

[0008] In addition, a rubber member molding apparatus according to an embodiment includes a supplying device that supplies a rubber strip, and a rotating body to which the rubber strip supplied from the supplying device is attached, and is provided with a holding member capable of holding the rubber strip, and a control device that controls the supplying device, the rotating body, and the holding member, and the control device executes the steps of: attaching the tip of the rubber strip supplied from the supplying device to the surface of the rotating body; rotating the rotating body while supplying the rubber strip from the supplying device, thereby continuously attaching a predetermined length of the rubber strip to the surface of the rotating body; and cutting the rubber strip at a position of the predetermined length from the tip, and in the step of cutting the rubber strip, the rotation of the rotating body is stopped, and the rubber strip is held by the holding member. A part of the holding member or a cutting member provided on the holding member is brought into contact with the rubber strip. The rubber strip is cut by rotating the rotor. Effect of the Invention

[0009] According to the rubber member molding method and rubber member molding device of the embodiment, the rubber strip can be easily cut after being wound around the molding drum. [Brief description of the drawings]

[0010] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 4 is a flow diagram of a rubber member molding method. [Diagram 5] FIG. 2 shows the state of the rubber strip when it begins to be wound around the building drum. [Figure 6] FIG. 2 shows the state when the rubber strip is almost completely wound and the building drum has stopped. [Figure 7] FIG. 13 is a diagram showing a state in which the holding member holds the rubber strip. [Figure 8] 13A and 13B are diagrams showing a state when the attitude of the holding member with respect to the building drum is changed. [Figure 9] 13 is a diagram showing a state in which the forming drum rotates, the rubber strip is cut, and the holding member retracts. FIG. [Figure 10] FIG. 13 is a diagram showing how a rubber strip is attached to a disk. [Figure 11] FIG. 2 is a diagram showing how a rubber strip is attached to a green tire. [Figure 12] FIG. 13 is a front view of a modified holding member provided with a blade. [Figure 13] 13 is a front view of a modified holding member provided with a blade, and FIG. [Figure 14] 13 is a front view of a modified holding member provided with a blade, and FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The embodiments will be described with reference to the drawings. Note that the embodiments described below are merely examples, and any appropriate modifications that do not depart from the gist of the present invention are included in the scope of the present invention.

[0012] 1, the rubber member molding apparatus of this embodiment includes a molding drum 11 as a rotating body, an extruder 13 for a rubber strip 12, and an attachment device 10 for attaching the rubber strip 12 extruded from the extruder 13 to the molding drum 11. The rubber strip 12 is an unvulcanized long rubber member. The extruder 13 is a supply device for supplying the rubber strip 12 toward the molding drum 11.

[0013] The laminating device 10 is disposed between the molding drum 11 and the extruder 13. In the following description, the side where the molding drum 11 is located is referred to as the front, and the side where the extruder 13 is located is referred to as the rear. In front of the extruder 13 and below the laminating device 10, a pair of upper and lower forming rollers 14 are disposed as part of the rubber member molding apparatus.

[0014] The extruder 13 has a general structure as a rubber extruder. The extruder 13 horizontally extrudes the rubber strip 12. A pair of upper and lower forming rollers 14 rotate and pinch the rubber strip 12 extruded from the extruder 13 from above and below, thereby adjusting the shape of the rubber strip 12.

[0015] The laminating device 10 is a device for receiving the rubber strip 12 extruded from the extruder 13 and passing between a pair of upper and lower forming rollers 14 to come out in front, and laminating it on the surface of a forming drum 11 located further forward. On the surface of the forming drum 11, the rubber strip 12 is spirally wound to form a cylindrical rubber member, or the rubber strip 12 is wound once around to form an annular rubber member. Examples of such rubber members include sidewall rubber and tread rubber.

[0016] The rotation axis of the molding drum 11 is perpendicular to the front-rear direction (which is also the extrusion direction of the rubber strip 12 from the extruder 13) and extends horizontally. The molding drum 11 rotates in an upward direction at a location opposite the laminating device 10.

[0017] The bonding device 10 includes a holding member 20 for holding the rubber strip 12, and a pressure roller 30 for pressing the rubber strip 12 on the forming drum 11 against the forming drum 11. When the holding member 20 is in the standby position, it is spaced apart from the forming drum 11 and is positioned to face the surface (outer peripheral surface) of the forming drum 11. The pressure roller 30 is disposed in a position further in the rotation direction of the forming drum 11 than the holding member 20. When the bonding roller 30 is in the standby position, it is spaced apart from the forming drum 11 and is positioned to face the surface of the forming drum 11.

[0018] 2, the holding member 20 has a hollow rectangular box-shaped portion 21 that is open toward the building drum 11. In the opening of the box-shaped portion 21, a urethane sponge 22 is fitted as a breathable elastic member.

[0019] A part of the urethane sponge 22 protrudes from the opening of the box-shaped portion 21. One of the surfaces of the urethane sponge 22 that protrudes from the box-shaped portion 21 and faces the forming drum 11 is an adsorption surface 23 that adsorbs the rubber strip 12. The urethane sponge 22 is a rectangular parallelepiped with the adsorption surface 23 as one of its faces. The side surface 24 that shares a side with the adsorption surface 23 and is perpendicular to the adsorption surface 23 is blinded by a process such as heating or applying paint, and is a non-permeable surface or a surface that is less permeable than the other surfaces. On the other hand, the adsorption surface 23 and the surface (rear surface 25) opposite the adsorption surface 23 have equal permeability. Therefore, air can pass from the adsorption surface 23 to the rear surface 25.

[0020] On the side opposite to the opening of the box-shaped portion 21, a suction hole 26 is formed penetrating the wall of the box-shaped portion 21. A suction hose 27 is connected to the suction hole 26, and a suction pump 28 (see FIG. 3) is connected to the end of the suction hose 27. When the suction pump 28 is operated, air is sucked from the adsorption surface 23 of the urethane sponge 22, passes through the back surface 25 of the urethane sponge 22, the inside of the box-shaped portion 21, the suction hole 26, and the suction hose 27, and is sucked into the suction pump 28. Due to this mechanism, the rubber strip 12 can be adsorbed onto the adsorption surface 23 of the urethane sponge 22 by operating the suction pump 28.

[0021] It is preferable that the adsorption surface 23 of the urethane sponge 22 is treated to make the rubber less likely to stick to it, for example, by applying an anti-adhesive agent to it. Also, the urethane sponge 22 itself may have an element added thereto to make the rubber less likely to stick to it.

[0022] As shown in FIG. 1, the application device 10 includes a base member 31 having a fixed position, a first cylinder 32 fixed to the upper surface of the base member 31, a first movable member 34 fixed to a rod 33 of the first cylinder 32, a second cylinder 35 fixed to the upper surface of the first movable member 34, a second movable member 37 fixed to a rod 36 of the second cylinder 35, and a third cylinder 38 fixed to the second movable member 37.

[0023] A pair of upper and lower oscillating cylinders 40, 42 are provided at the front portion of the first movable member 34. The rod 41 of the upper oscillating cylinder 40 is connected to the upper part of the holding member 20. The rod 43 of the lower oscillating cylinder 42 is connected to the lower part of the holding member 20. The angle of the suction surface 23 of the holding member 20 relative to the vertical direction can be changed by adjusting the forward advance distance of the rods 41, 43 of the upper and lower oscillating cylinders 40, 42.

[0024] The rod 39 of the third cylinder 38 can advance and retreat diagonally downward toward the molding drum 11. A pressure roller 30 is provided at the tip of the rod 39. Therefore, the pressure roller 30 also advances and retreats when the rod 39 of the third cylinder 38 advances and retreats. The pressure roller 30 is a free roller, and when pressed against the rotating molding drum 11, it rotates in the opposite direction to the rotation direction of the molding drum 11.

[0025] In this structure, as the rod 33 of the first cylinder 32 advances and retreats, the first movable member 34 advances and retreats, and the holding member 20 and the pressure roller 30 advance and retreat together. Also, as the rod 36 of the second cylinder 35 advances and retreats, the second movable member 37 advances and retreats, and the pressure roller 30 advances toward or retreats from the building drum 11.

[0026] The holding member 20 moves forward and backward as a whole due to the advancement and retreat of the pair of upper and lower oscillating cylinders 40, 42. Furthermore, the angle of the holding member 20 with respect to the vertical direction changes as described above due to the advancement and retreat of the pair of upper and lower oscillating cylinders 40, 42. When the rod 33 of the first cylinder 32 and the rods 41, 43 of the oscillating cylinders 40, 42 advance forward, the holding member 20 can come into contact with the building drum 11.

[0027] As described above, the rod 39 of the third cylinder 38 moves forward and backward, causing the pressure roller 30 to move forward and backward relative to the forming drum 11. When the rod 33 of the first cylinder 32 and the rod 36 of the second cylinder 35 advance forward and the rod 39 of the third cylinder 38 advances obliquely downward, the pressure roller 30 can come into contact with the forming drum 11.

[0028] 3, the extruder 13, the pair of upper and lower forming rollers 14, the forming drum 11, the suction pump 28, the cylinders 32, 35, 38, 40, 42, etc. are connected to a control device 15. For example, the control device 15 synchronizes the operation and rotation of the extruder 13, the forming roller 14, and the forming drum 11, and pays out from the forming roller 14 a rubber strip 12 corresponding to the take-up length due to the rotation of the forming drum 11. The control device 15 executes a rubber member forming method which will be described next.

[0029] The rubber member molding method will be described with reference to Fig. 4. At the start of the rubber member molding method, the holding member 20 and the pressure roller 30 are in a standby position away from the molding drum 11.

[0030] In the rubber member molding method, first, the control device 15 operates the extruder 13 to start rotating the pair of upper and lower molding rollers 14 (S1). As a result, the rubber strip 12 is extruded from the extruder 13 and passes through the molding rollers 14, and advances forward.

[0031] Next, the tip of the rubber strip 12 that has passed through the forming roller 14 is attached to a predetermined position on the forming drum 11 by an operator or a holding member 20 (S2). When the rubber member is molded for the first time, the operator attaches the tip of the rubber strip 12 to the forming drum 11. When the rubber member is molded for the second or subsequent times, the holding member 20 attaches the tip of the rubber strip 12 to the forming drum 11 as described below.

[0032] Next, the control device 15 starts rotating the molding drum 11 (S3). This starts the application of the rubber strip 12 to the molding drum 11. When the molding drum 11 rotates a little and the leading end of the rubber strip 12 reaches the position for compression by the compression roller 30, the control device 15 advances the compression roller 30 to press it against the rubber strip 12 on the molding drum 11. This starts the compression of the rubber strip 12 by the compression roller 30. The state at that time is shown in FIG.

[0033] Thereafter, the control device 15 rotates the molding drum 11 while extruding the rubber strip 12 from the extruder 13, thereby continuously attaching the rubber strip 12 to the surface of the molding drum 11. When winding the rubber strip 12 in a spiral shape around the molding drum 11, a guide member (not shown) adjacent to the molding drum 11 may be used so that the rubber strip 12 can be smoothly wound in a spiral shape around the molding drum 11. The guide member moves little by little in the axial direction of the molding drum 11 while guiding the rubber strip 12, thereby gradually moving the winding position of the rubber strip 12 around the molding drum 11 in the axial direction of the molding drum 11. As a result, the rubber strip 12 is wound in a neat spiral shape.

[0034] While the rubber strip 12 is continuously applied to the surface of the forming drum 11, a pressure roller 30 presses the rubber strip 12 on the forming drum 11 against the forming drum 11.

[0035] When a predetermined length of the rubber strip 12 has been attached to the molding drum 11 (Yes in S4), the control device 15 stops the extrusion of the rubber strip 12 from the extruder 13 and the rotation of the molding drum 11 and the molding roller 14 (S5). The state when the rotation of the molding drum 11 has stopped is shown in Figure 6.

[0036] Next, the control device 15 holds the rubber strip 12 with the holding member 20 as shown in Fig. 7 (S6). In detail, the control device 15 first advances the holding member 20 toward the building drum 11 and brings the holding member 20 into contact with a portion of the rubber strip 12 immediately before it is to be wound around the building drum 11. At this time, the control device 15 brings the front end 20a (see Fig. 6) of the holding member 20 into contact with a position where the rubber strip 12 is to be cut. The position where the rubber strip 12 is to be cut is a position that is a predetermined length from the tip of the rubber strip 12. At the position of the front end 20a of the holding member 20, the rubber strip 12 is attached to the building drum 11 side (on the portion of the rubber strip 12 that was previously attached to the building drum 11 or to the building drum 11).

[0037] Next, the control device 15 starts suction by the suction pump 28 to adsorb the rubber strip 12 to the holding member 20. As a result, the holding member 20 holds the rubber strip 12.

[0038] Next, the control device 15 retracts the rod 43 of the lower oscillating cylinder 42. As a result, the holding member 20 assumes an upright position relative to the tangential direction of the molding drum 11 (S7). In detail, as shown in FIG. 8, the rear end 20b of the holding member 20 is raised in a direction away from the molding drum 11, with the front end 20a of the holding member 20 as a fulcrum. As a result, the front end 20a, which is a corner of the holding member 20, is pressed against the rubber strip 12, causing scratches or creases in the rubber strip 12. Even in this upright position, the rubber strip 12 is adsorbed to the entire suction surface 23 of the holding member 20.

[0039] Next, the control device 15 resumes the rotation of the building drum 11 while the holding member 20 is kept in the upright position and while the holding member 20 is holding the rubber strip 12. Then, the rubber strip 12 is cut by being torn off starting from the scratch or crease made by the front end portion 20a of the holding member 20 (S8). The portion of the rubber strip 12 that is wound around the building drum 11 and is adjacent to the cut portion is pressed against the building drum 11 by the pressing roller 30. This completes the molding of the rubber member on the building drum 11.

[0040] Next, the control device 15 causes the holding member 20 to retract from the molding drum 11 (S9), as shown in Fig. 9. The control device 15 may cause the holding member 20 to retract a predetermined time (the time required for the rubber strip 12 to be cut) after the rotation of the molding drum 11 is resumed, or may cause the holding member 20 to retract when a sensor detects that the rubber strip 12 has been cut. The holding member 20 continues to hold the rubber strip 12 even after it has been retracted. After causing the holding member 20 to retract, the control device 15 also causes the pressure roller 30 to retract. The rubber member is then removed from the molding drum 11.

[0041] Next, if molding of the required number of rubber members has not been completed (No in S10), molding of a second rubber member is carried out.

[0042] When molding of the second rubber member begins, the holding member 20 is already holding the rubber strip 12. Therefore, the control device 15 advances the holding member 20 to attach the tip of the rubber strip 12 to a predetermined position on the molding drum 11 (S2). Once the rubber strip 12 has been attached to the molding drum 11, the control device 15 stops suction by the suction pump 28, releases the rubber strip 12, and retreats. The control device 15 then performs steps S3 to S9 again.

[0043] The control device 15 repeats steps S2 to S10, and ends the control when the required number of rubber members have been molded (Yes in S10). The molded rubber members are transported to a subsequent process and used as part of a tire.

[0044] As described above, in the method of this embodiment, the control device 15 rotates the molding drum 11 while extruding the rubber strip 12 from the extruder 13, thereby continuously attaching a predetermined length of the rubber strip 12 to the surface of the molding drum 11. Then, when cutting the rubber strip 12, the control device 15 stops the extrusion of the rubber strip 12 from the extruder 13 and the rotation of the molding drum 11, holds the rubber strip 12 with the holding member 20, and rotates the molding drum 11 again to cut the rubber strip 12. In this way, the rubber strip 12 can be easily cut without using any special device.

[0045] In the method of this embodiment, the control device 15 cuts the rubber strip 12 by abutting the front end 20a, which is a part of the holding member 20, against the rubber strip 12 and rotating the building drum 11. This makes it possible to cut the rubber strip 12 starting from the front end 20a, and to obtain a clean cut surface. The rubber strip 12 immediately after being extruded from the extruder 13 is easily deformed, and the cut portion is likely to stretch or deform when cut, but this method makes it possible to prevent the cut portion from stretching or deforming.

[0046] Here, as a method for bringing the front end portion 20a of the retaining member 20 into contact with the rubber strip 12, a method of changing the position of the retaining member 20 relative to the building drum 11 is adopted, so that the front end portion 20a can be easily brought into contact with the rubber strip 12.

[0047] Furthermore, in the lamination device 10 of this embodiment, the control device 15 controls so that, after rotating the molding drum 11 while extruding the rubber strip 12 from the extruder 13 to continuously laminate a predetermined length of the rubber strip 12 onto the surface of the molding drum 11, the control device 15 stops the extrusion of the rubber strip 12 from the extruder 13 and the rotation of the molding drum 11, and rotates the molding drum 11 while holding the rubber strip 12 with the holding member 20 to cut the rubber strip 12. Therefore, the lamination device 10 can easily cut the rubber strip 12.

[0048] The above embodiment can be modified in various ways, and modifications of the embodiment will be described below.

[0049] <Change Example 1> In the modified example shown in Fig. 10, the laminating device 10 laminates the rubber strip 12 on a flat disk 111 instead of the forming drum 11. The disk 111 stands perpendicular to the extrusion direction of the rubber strip 12. The disk 111 is rotatable, and its rotation axis 112 is parallel to the extrusion direction of the rubber strip 12.

[0050] When attaching the rubber strip 12 to such a disk 111, the attachment device 10 operates in the same manner as in the above embodiment. However, when the holding member 20 attaches the tip of the rubber strip 12 to the disk 111, it is preferable that the holding member 20 be parallel to the disk 111.

[0051] For this purpose, a C-shaped ring 113 is fitted to at least one of the rods 41, 43 of the oscillating cylinders 40, 42. When the rods 41, 43 move backward, the ring 113 hits a location (a location other than the rods 41, 43, such as the first movable member 34, for example) and the rods 41, 43 cannot move backward any further, at which point the holding member 20 becomes parallel to the disk 111. With this configuration, the holding member 20 can be easily made parallel to the disk 111.

[0052] <Change Example 2> 11, the application device 10 applies a rubber strip 12 to the side of a green tire 114 before the sidewall rubber is applied. In this way, the sidewall rubber is molded on the side of the green tire 114.

[0053] During molding of the sidewall rubber, the green tire 114 is held from the inner diameter side by a holding device. The holding device may be a core member having the inner shape of the green tire 114 or the target inner shape of the finished tire, a balloon that expands by supplying air, a molding drum, a shaping drum, or the like.

[0054] In this modification, the C-shaped ring 113 may be used as in the first modification.

[0055] <Change Example 3> 12 to 14, a blade 100 serving as a cutting member for cutting the rubber strip 12 may be provided on the front end portion 20a side of the holding member 20. The blade 100 becomes thinner toward the adsorption surface 23 side, and is sufficiently harder than the rubber strip 12 made of unvulcanized rubber. Moreover, the blade 100 is preferably made of a material to which unvulcanized rubber does not easily adhere, such as a fluorine-based resin.

[0056] When cutting the rubber strip 12, similarly to the above embodiment, the control device 15 advances the holding member 20 toward the rubber strip 12 and causes the rubber strip 12 to be adsorbed to the holding member 20 (FIG. 13). Next, the control device 15 changes the position of the holding member 20 to an upright position relative to the tangential direction of the building drum 11 (FIG. 14). As the position of the holding member 20 changes, the tip of the blade 100 comes into contact with the rubber strip 12, causing scratches on the rubber strip 12.

[0057] Thereafter, the control device 15 rotates the building drum 11 while maintaining the posture of the holding member 20 and while holding the rubber strip 12 with the holding member 20. Then, the rubber strip 12 is cut by being torn off starting from the cut made by the blade 100.

[0058] It should be noted that, when the attitude of the holding member 20 is changed, the blade 100 may penetrate deeply into the rubber strip 12 to cut the rubber strip 12. This is possible if the attitude of the holding member 20 is changed significantly.

[0059] In any case, the position of the tip of the blade 100 is set so that the blade 100 comes into contact with the rubber strip 12 when the posture of the holding member 20 changes. The position of the tip of the blade 100 is a position farther from the building drum 11 than the adsorption surface 23 in a direction perpendicular to the adsorption surface 23. A distance L1 (see FIG. 12) between the tip of the blade 100 and the adsorption surface 23 in a direction perpendicular to the adsorption surface 23 is preferably 0.5 to 3 times the thickness of the rubber strip 12. In addition, a distance L2 (see FIG. 12) between the tip of the blade 100 and the front end 20a of the holding member 20 in a direction parallel to the adsorption surface 23 is preferably 0.5 to 3 times the maximum thickness of the blade 100.

[0060] As in this modified example, by bringing the blade 100 provided on the holding member 20 into contact with the rubber strip 12 and rotating the building drum 11, the rubber strip 12 can be neatly cut.

[0061] <Change Example 4> As the breathable elastic member provided in the holding member 20, a sponge other than the urethane sponge 22, a thick fiber material, or the like can be used.

[0062] <Change Example 5> There may be only one swivel cylinder that changes the angle of the holding member 20 relative to the up-down direction. For example, only one of the upper and lower swivel cylinders 40, 42 in the above embodiment may be left, and the other may be changed to a support member that only supports the upper or lower part of the holding member 20. Even in this case, the angle of the holding member 20 relative to the up-down direction can be changed by the action of the remaining swivel cylinder.

[0063] <Change Example 6> The rubber strip extruded from the extruder may be temporarily wound on a take-up tube called a bobbin, and the rubber strip may be supplied from the take-up tube to the building drum. The take-up tube is a tube that can be rotated by a motor, and can take up the rubber strip by rotating in one direction and can unwind the rubber strip by rotating in the opposite direction. Such a take-up tube serves as the rubber strip supply device in this modified example. [Explanation of symbols]

[0064] 10... bonding device, 11... forming drum, 12... rubber strip, 13... extruder, 14... forming roller, 15... control device, 20... holding member, 20a... front end, 20b... rear end, 21... box-shaped portion, 22... urethane sponge, 23... suction surface, 24... side, 25... rear surface, 26... suction hole, 27... suction hose, 28... suction pump, 30... pressure roller, 31... base member, 32... first cylinder, 33... rod, 34... first movable member, 35... second cylinder, 36... rod, 37... second movable member, 38... third cylinder, 40... oscillating cylinder, 41... rod, 42... oscillating cylinder, 43... rod, 100... blade, 111... disk, 112... rotating shaft, 113... ring, 114... green tire

Claims

1. A method for molding a rubber member by attaching a rubber strip to a surface of a rotating body, comprising the steps of: A step of attaching a tip of the rubber strip to a surface of the rotating body; a step of continuously attaching a predetermined length of the rubber strip to a surface of the rotating body by rotating the rotating body while supplying the rubber strip; and cutting the rubber strip at a position of the predetermined length from the tip. In the step of cutting the rubber strip, A rubber member molding method, characterized in that rotation of the rotating body is stopped, the rubber strip is held by a holding member capable of holding the rubber strip, and a part of the holding member or a cutting member provided on the holding member is brought into contact with the rubber strip, thereby rotating the rotating body and cutting the rubber strip.

2. In the step of cutting the rubber strip, The rubber member molding method according to claim 1 , wherein the holding member changes its position relative to the rotating body to bring the cutting member into contact with the rubber strip.

3. A rubber member molding apparatus having a supply device for supplying a rubber strip and a rotating body to which the rubber strip supplied from the supply device is attached, A holding member capable of holding the rubber strip; a control device for controlling the supply device, the rotating body, and the holding member is provided; The control device, A step of attaching the tip of the rubber strip supplied from the supply device to a surface of the rotating body; a step of continuously attaching a predetermined length of the rubber strip to a surface of the rotating body by rotating the rotating body while supplying the rubber strip from the supply device; cutting the rubber strip at a position of the predetermined length from the tip; In the step of cutting the rubber strip, A rubber member molding device characterized by controlling the rotation of the rotating body to be stopped, the rubber strip to be held by the holding member, and a part of the holding member or a cutting member provided on the holding member to be brought into contact with the rubber strip, thereby rotating the rotating body and cutting the rubber strip.

Images