Tire material supply system and method for producing cylindrical tire member

Abstract

To provide a supply system which quickly switches between different types of tire materials and supplies them to a molding drum body without complicating operations, and supplies a desired type of tire material to a desired range in a width direction of the molding drum body, and a method for producing a cylindrical tire member.SOLUTION: In each independent supply passage from supply units 1A, 1B for each type of strip-shaped tire material M1, M2 to heads 3A, 3B, a predetermined amount of the tire material M1, M2 is stored in festoon sections 2a, 2b between the supply units 1A, 1B and heads 3A, 3B, and each head 3A, 3B is positioned with a shift in the front-to-rear direction of the drum relative to a molding drum body 7. Each head 3A, 3B is slid integrally in a width direction of the molding drum body 7, and the tire materials M1, M2 are spirally wound around the molding drum body 7 to produce a cylindrical tire member M.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tire material supplying system and a method for manufacturing a cylindrical tire component, and more particularly to a tire material supplying system and a method for manufacturing a cylindrical tire component, which can quickly switch between different types of tire material and supply them to a building drum body without complicating operations in a process of manufacturing a cylindrical tire component by supplying strip-shaped tire material to a building drum body and winding it in a spiral shape, and which can supply the desired type of tire material to a desired range in the width direction of the building drum body. [Background technology]

[0002] A tire is manufactured by vulcanizing a green tire. A green tire is formed by stacking many types of tire components. For example, a belt reinforcing layer is manufactured by spirally winding a strip material around the outer peripheral surface of a belt layer formed in a cylindrical shape on a forming drum. Various devices for winding such strip material have been proposed (for example, see Patent Document 1).

[0003] The device proposed in Patent Document 1 includes a pair of left and right winding units in order to easily switch between and supply a plurality of types of strip material to the forming drum. The pair of left and right winding units are arranged symmetrically with respect to the center of the width direction of the forming drum, and each winding unit has a plurality of winding heads arranged in parallel. Different types of strip material are supplied to each of the parallel winding heads. The left winding unit moves in the drum width direction (left and right direction) within a range from the center of the drum width direction to the left, supplies the strip material to the forming drum and forms a spiral layer, and the right winding unit moves in the drum width direction (left and right direction) within a range from the center of the drum width direction to the right, supplies the strip material to the forming drum and forms a spiral layer.

[0004] In this device, the winding ranges of the left and right winding units are divided at the center of the drum width direction, so in order to wind the strip material into the ranges on both sides of the drum width direction, it is necessary to move both the left and right winding heads in the drum width direction. Furthermore, in order to wind the desired type of strip material into the desired range in the width direction of the forming drum, it is necessary to appropriately control each winding unit and winding head, which makes the operation complicated. Therefore, there is room for improvement in being able to quickly switch between different types of tire material and supply them to the forming drum without complicating the operation, and in supplying the desired type of tire material to the desired range in the width direction of the forming drum. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-9548 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a tire material supplying system and a method for manufacturing a cylindrical tire component, which can quickly switch between different types of tire material and supply them to a building drum body without complicating operations, and can supply a desired type of tire material to a desired range in the width direction of the building drum body. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the tire material supply system of the present invention provides a tire material supply system to a molding drum body, the system comprising: respective supply units arranged at stock positions and in which strip-shaped tire material is wound and stored by type; a molding drum body around which each of the tire materials is spirally wound; and a head for each type of tire material that spirally winds the tire material unwound from each of the supply units around the molding drum body, the tire material supply system being characterized in that a supply path from the supply unit to the head is independent for each type of tire material, and each of the supply paths is provided with a festoon section between the supply unit and the head for storing a predetermined amount of the tire material supplied through the supply path, each of the heads is arranged at a different position in the front-to-rear direction of the drum with respect to the molding drum body, and each of the heads is configured to slide and move integrally in the width direction of the molding drum body.

[0008] The manufacturing method for a cylindrical tire component of the present invention is characterized in that, using the tire material supply system to the forming drum body, the tire material is supplied to the forming drum body and wound in a spiral shape to manufacture a cylindrical tire component. Effect of the Invention

[0009] According to the tire material supply system of the present invention, since the supply paths from the supply unit to the head are independent for each type of tire material, the desired type of tire material can be wound around the building drum body by simply switching the head to be used. Therefore, different types of tire material can be quickly switched and supplied to the building drum body without complicating operations.

[0010] The heads are arranged at different positions in the drum front-rear direction with respect to the building drum body, and the heads slide together in the width direction of the building drum body. This allows the heads to slide without being restricted by the other heads. This is advantageous in supplying the desired type of tire material to a desired range in the width direction of the building drum body without complicating operations.

[0011] Since the festoon units are provided in the respective supply paths, the tire materials can be stably replenished without interrupting the supply of the tire materials, which is more advantageous in avoiding the complication of operations when the tire materials are continuously supplied to the building drum body.

[0012] According to the manufacturing method of the cylindrical tire component of the present invention, by using the tire material supply system to the building drum body, the tire component can be manufactured with high productivity without complicating operations. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is an explanatory diagram illustrating an embodiment of a tire material supply system in a plan view. [Diagram 2] 2 is an explanatory diagram illustrating the forming drum body and each head of FIG. 1 as viewed from the side. FIG. [Diagram 3] 2 is an explanatory diagram illustrating each head in FIG. 1 in a plan view. [Figure 4] 3 is an explanatory diagram illustrating a state in which one of the tire materials is being supplied to a building drum body by one of the heads in FIG. 2.

[0023] FIG. [Diagram 5] 3 is an explanatory view illustrating a state in which the other tire material is being supplied to the building drum body by the other head in FIG. 2.

[0023] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a system for supplying a tire material to a building drum body and a method for manufacturing a cylindrical tire component of the present invention will be described based on embodiments shown in the drawings.

[0015] Using a tire material supply system (hereinafter referred to as the supply system) for a building drum body illustrated in Figs. 1 to 3, strip-shaped tire materials M1, M2 are spirally wound around a building drum body 7 to manufacture a cylindrical tire member M. The tire materials M1, M2 are formed, for example, from unvulcanized rubber, reinforcing cords, etc. A belt reinforcing material as the tire materials M1, M2 is spirally wound around the building drum body 7 on which a cylindrical belt layer is formed, and molded into a cylindrical shape to manufacture a cylindrical belt reinforcing layer. This belt reinforcing layer is used as a constituent member of a green tire G, and a tire T is manufactured by vulcanizing the green tire G.

[0016] As illustrated in Figures 1 to 3, this supply system includes a supply unit 1 (1A, 1B) arranged at a stock position P1, a forming drum body 7, heads 3A, 3B, festoon parts 2a, 2b, approach movement means 5, 5 for moving the heads 3A, 3B closer to the forming drum body 7, and slide movement means 6 for sliding the heads 3A, 3B in the width direction (X direction) of the forming drum body 7. The X, Y, and Z arrows in the figures respectively indicate the width direction, front-rear direction, and height direction of the supply system, which are perpendicular to each other. In the figures, the direction from the conveyor toward the forming drum body 7 in the front-rear direction (Y direction) is the front.

[0017] At the stock position P1, a plurality of supply units 1A, 1B are arranged in parallel. One of the supply units 1A has tire material M1 wound and stored. The other supply unit 1B has tire material M2 wound and stored. Each of the supply units 1A, 1B has a winding core, and tire materials M1, M2 are stored in a wound state around the winding core. In this way, tire materials M1, M2 are wound and stored by type.

[0018] The forming drum body 7 rotates about a drum axis C. The drum axis C extends in the X direction (parallel to the X direction). Tire materials M1 and M2 fed from respective supply units 1A and 1B are wound in a spiral shape around the forming drum body 7 by respective heads 3A and 3B.

[0019] The supply paths from the supply units 1A, 1B to the heads 3A, 3B are independent for each type of tire material M1, M2. That is, one type of tire material M1 is supplied to the building drum body 7 through a supply path from one supply unit 1A to one head 3A. The other tire material M2 is supplied to the building drum body 7 through a supply path from the other supply unit 1B to the other head 3B. Therefore, supply units 1A, 1B and heads 3A, 3B are provided for each type of tire material M1, M2.

[0020] The festoon sections 2a, 2b are installed between the supply units 1A, 1B and the heads 3A, 3B in the supply paths of the tire materials M1, M2, respectively. The festoon sections 2a, 2b store a predetermined amount of the tire materials M1, M2 supplied through the respective supply paths. Therefore, the tire materials M1, M2 fed from the respective supply units 1A, 1B pass through the respective festoon sections 2a, 2b and are supplied to the respective heads 3A, 3B. Various known types of festoon sections 2a, 2b can be used as the festoon sections 2a, 2b.

[0021] In this embodiment, a plurality of support rollers are disposed in the supply paths of the tire materials M1 and M2, and the tire materials M1 and M2 are stretched over the respective support rollers, thereby changing the conveying direction and being supplied from the respective supply units 1A and 1B to the building drum body 7. In this embodiment, as illustrated in Fig. 1, the tire materials M1 and M2 fed from the respective supply units 1A and 1B proceed along the Y direction, pass through the respective festoon sections 2a and 2b, turn 90° and proceed along the X direction (lateral movement section), and then turn 90° and proceed along the Y direction (drum supply section) to be supplied to the building drum body 7. In this drum supply section, the tire materials M1 and M2 extend overlapping each other in a plan view, and in a side view, as illustrated in Fig. 2, the other tire material M2 extends above one tire material M1 with a vertical gap therebetween.

[0022] Each of the heads 3A and 3B has a pressing unit 4. The pressing unit 4 guides the supplied tire materials M1 and M2 and presses them against the outer circumferential surface of the building drum body 7. A rotating roller body or the like is used for the pressing unit 4. Each of the heads 3A and 3B also has a cutter that cuts the tire materials M1 and M2.

[0023] The approaching movement means 5 moves the head 3A closer to (closer to and away from) the forming drum body 7. As the approaching movement means 5, fluid cylinders such as hydraulic cylinders, rods that are advanced and retreated by a servo motor, etc. can be used.

[0024] The slide movement means 6 slides the heads 3A, 3B together in the width direction relative to the forming drum body 7. As the slide movement means 6, fluid cylinders such as hydraulic cylinders, rods that are moved forward and backward by a servo motor, etc. can be used.

[0025] 3, the heads 3A, 3B are disposed in series with their positions shifted in the drum front-rear direction (Y direction) relative to the forming drum body 7. The heads 3A, 3B are moved toward and away from the forming drum body 7 independently of each other by their respective approach movement means 5, 5. The pressing unit 4 moves to a standby position away from the outer circumferential surface of the forming drum body 7 and a winding position close to it, and the tire materials M1, M2 are pressed toward the outer circumferential surface of the forming drum body 7 by the pressing unit 4 moved to the winding position.

[0026] In this embodiment, the heads 3A, 3B are connected by a connector, and the tip of the rod of one sliding movement means 6 is connected to this connector. By using one sliding movement means 6 to slide the two heads 3A, 3B together in the width direction, it is advantageous to simplify the device configuration and operation. The range in which the heads 3A, 3B slide is set to cover the width direction range in which the tire materials M1, M2 are wound.

[0027] Therefore, the heads 3A and 3B can slide in the width direction without being restricted by the presence of the other heads. That is, the pressure-bonding parts 4, 4 of the heads 3A and 3B can slide in the width direction within a range from one end to the other end of the forming drum body 7 in the width direction without being restricted by the presence of the other heads 3B and 3A.

[0028] Next, an example of a procedure for manufacturing a cylindrical tire member M using this supply system will be described.

[0029] In this supply system, cylindrical tire components M are continuously manufactured. When manufacturing the tire component M using one tire material M1, as illustrated in FIG. 4, the forming drum body 7 is rotated about the drum axis C, and the pressing section 4 of one head 3A is moved to a desired range in the width direction at a position close to the outer circumferential surface of the forming drum body 7. In this way, the tire material M1 supplied to the head 3A is spirally wound around the forming drum body 7 by the pressing section 4. When the heads 3A and 3B are slid and moved together in the width direction using one sliding movement means 6 to wind the tire material M1 in a desired range in the width direction of the forming drum body 7, the tire material M1 is cut and a tire component M in which the tire material M1 is formed into a cylindrical shape is manufactured.

[0030] For example, a tire material M1, which is a belt reinforcing material, is spirally wound around the outer peripheral surface of the belt layer on the forming drum body 7 to produce a belt reinforcing layer as a tire component M, which is then laminated on the belt layer. The produced tire component M is removed from the forming drum body 7, and thereafter, a new tire component M is continuously produced on the forming drum body 7 using the same procedure.

[0031] When switching from the tire material M1 to a different type of tire material M2 and manufacturing a tire component M using the molding drum body 7, as illustrated in FIG. 5, the molding drum body 7 is rotated about the drum axis C, and the heads 3A and 3B are moved integrally to a desired range in the width direction by using one slide moving means 6 at a position where the pressing part 4 of the other head 3B is brought close to the outer circumferential surface of the molding drum body 7. As a result, the tire material M2 supplied to the head 3B is wound in a spiral shape around the molding drum body 7 by the pressing part 4. When the tire material M2 is wound in a desired range in the width direction of the molding drum body 7, the tire material M2 is cut and a tire component M in which the tire material M2 is molded into a cylindrical shape is manufactured. The manufactured tire component M is removed from the molding drum body 7, and then a new tire component M is continuously manufactured on the molding drum body 7 by the same procedure.

[0032] According to this supply system, by simply switching between the heads 3A and 3B to be used, the desired types of tire materials M1 and M2 can be wound around the building drum body 7. Therefore, different types of tire materials M1 and M2 can be quickly switched and supplied to the building drum body 7 without complicating operations.

[0033] There are also cases where one tire material M1 is spirally wound around the building drum body 7 to manufacture a tire component M, and then the other tire material M2 is spirally wound around the tire component M adjacent to or spaced apart in the width direction, or laminated on the tire component M, to manufacture the tire component M. In this case as well, in order to switch from the tire material M1 to the tire material M2 and supply it to the building drum body 7, it is sufficient to simply switch the heads 3A and 3B to be used, and therefore no complicated operations are required.

[0034] As described above, each of the heads 3A, 3B can slide in the width direction without being restricted by the other heads 3B, 3A. Since the presence of the other heads 3B, 3A does not need to be taken into consideration for the sliding movement of each of the heads 3A, 3B in the width direction, operations are not complicated, which is advantageous for supplying and winding desired types of tire materials M1, M2 in a desired range in the width direction of the building drum body 7. That is, by using each of the heads 3A, 3B to move each of the tire materials M1, M2 to a desired range in the width direction of the building drum body 7 and winding it in a spiral shape, a cylindrical tire component M can be easily manufactured in a desired range in the width direction.

[0035] Since the festoon units 2a and 2b are installed in the supply paths of the tire materials M1 and M2, when the stocks of the tire materials M1 and M2 in the supply units 1A and 1B run out (become low), the tire materials M1 and M2 can be replenished until the storage amounts in the festoon units 2a and 2b fall below a reference amount. Therefore, the tire materials M1 and M2 can be replenished stably without interrupting the supply of the tire materials M1 and M2 to the heads 3A and 3B. Accordingly, when the tire materials M1 and M2 are continuously supplied to the building drum body 7 to manufacture the tire component M, it is possible to avoid a complicated operation such as urgently replenishing the tire materials M1 and M2.

[0036] Use of this supply system is advantageous in producing a cylindrical tire component M by supplying tire materials M1 and M2 to the building drum body 7 and winding them in a spiral shape, without complicating operations and with good productivity.

[0037] The forming drum body 7 is not limited to various commonly known forming drums, but may be, for example, a so-called rigid core having an outer surface substantially the same as the inner surface of the tire T to be manufactured.

[0038] In this embodiment, two types of tire materials M1 and M2 are used, but three or more types of tire materials can be used. In this case, as described above, a supply unit and a head (heads arranged in series) are provided for each type of tire material to form an independent transport path, and one slide moving means 6 is provided.

[0039] Each of the heads 3A and 3B is installed below the forming drum body 7. A transport conveyor or the like is arranged to supply other tire materials (such as belt material) to the forming drum body 7. This transport conveyor is often installed above the forming drum body 7, so in this embodiment, in order to avoid this transport conveyor, each of the heads 3A and 3B is installed below the forming drum body 7. When this transport conveyor is installed below the forming drum body 7, each of the heads 3A and 3B is installed above the forming drum body 7.

[0040] In this embodiment, a plurality of support rollers are arranged in the supply paths of the tire materials M1 and M2, and the tire materials M1 and M2 are stretched across the respective support rollers to change their conveying directions. By using the support rollers in this manner, the conveying paths of the tire materials M1 and M2 can be extended three-dimensionally in a desired direction, making it easier to ensure the conveying paths even in a narrow space. [Explanation of symbols]

[0041] 1(1A, 1B) Supply Unit 2a, 2b Festoon section 3A, 3B head 4 Crimping section 5. Close-compartment transportation 6 Slide movement means 7. Forming drum body M1, M2 tire materials M Tire parts

Claims

1. A tire material supply system to a building drum body, the system comprising: supply units arranged at a stock position and in which strip-shaped tire material is wound and stored by type; a building drum body around which each of the tire materials is wound in a spiral shape; and heads for each of the types of tire material that wind the tire material unwound from each of the supply units in a spiral shape around the building drum body, a supply path from the supply unit to the head is independent for each type of tire material, and a festoon unit is provided in each of the supply paths to store a predetermined amount of the tire material supplied through the supply path between the supply unit and the head, A system for supplying tire material to a forming drum body, in which each of the heads is arranged at a different position in the drum front-to-rear direction relative to the forming drum body, and each of the heads is configured to slide and move integrally in the width direction of the forming drum body.

2. 2. The system for feeding tire material to a building drum as claimed in claim 1, wherein each of said heads is located below said building drum.

3. 3. The system for supplying tire material to a building drum body according to claim 1 or 2, wherein a plurality of support rollers are arranged in each of the supply paths, and the tire material supplied through the supply paths is stretched over each of the support rollers to change its conveying direction.

4. A method for manufacturing a cylindrical tire component, comprising: using the tire material supply system to a building drum body according to claim 1 or 2; supplying the tire material to the building drum body and winding the tire material in a spiral shape to manufacture a cylindrical tire component.

5. A method for manufacturing a cylindrical tire component, comprising the steps of: supplying the tire material to the building drum body and spirally winding the tire material on the building drum body using the tire material supply system to the building drum body according to claim 3 to manufacture a cylindrical tire component.

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