EP-4737107-A1 - SYSTEM FOR SUPPLYING TIRE MATERIALS TO MOLDING DRUM AND METHOD FOR PRODUCING TIRE

EP4737107A1EP 4737107 A1EP4737107 A1EP 4737107A1EP-4737107-A1

Abstract

Provided are a system for supplying a tire material to a forming drum body and a method of manufacturing a tire that can make a tire forming device compact, further reduce time loss due to replenishment of tire material, and efficiently supply multiple types of tire materials to one forming drum body. Supply units (5 and 6) stocked with different types of tire materials (M1 and M2) are arranged side by side at adjacent stock positions (P1 and P2). Supply directions of the tire materials (M1 and M2) fed out from the supply units 5 and 6 are made to intersect in a plan view. For a band drum (3) and a supply conveyor (6e) at predetermined certain positions, the tire materials (M1 and M2) fed out from the respective supply units (5 and 6) and cut to predetermined lengths are transferred to the supply conveyor (6e) via slide conveyors (5d and 6d) arranged at the respective stock positions (P1 and P2) and a turning conveyor (5e) between the slide conveyors (5d and 6d) and the supply conveyor (6e) and are sequentially supplied to the band drum (3).

Inventors

KONDO, Masatomo
ONISHI, KOHEI
WATANABE, MASAYUKI
MATSUMURA, Kensuke
NUMAZAKI, Yasushi
KAWAI, MASAHIRO
OISHI, Junpei
ZENYOJI, Chihiro
WATANABE, TAKEHIRO
SAITO, Dai
MATSUMARU, Teruaki

Assignees

The Yokohama Rubber Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240710

Claims (6)

A system for supplying a tire material to a forming drum body, the system comprising: a supply unit in which a tire material having a band shape is wound and stocked; a forming drum body; and a supply conveyor arranged between the supply unit and the forming drum body and having a configuration in which the tire material is fed out from the supply unit and is cut into tire materials each having a predetermined length and the tire materials are placed flat on the supply conveyor, supplied to the forming drum body, and formed into a cylindrical shape by being wound around the forming drum body; a plurality of the supply units arranged side by side being at a plurality of respective stock positions, the tire materials fed out from the supply units at adjacent stock positions being of different kinds, each of the supply units being arranged such that supply directions of the tire materials intersect each other at a predetermined angle, slide conveyors configured to slide in a parallel direction of each of the supply units being provided at the respective stock positions, a turning conveyor configured to turn in a plan view being provided between each of the slide conveyors and the supply conveyor, for the forming drum body and the supply conveyor installed at predetermined certain positions, the tire materials fed out from one of the supply units at each of the stock positions and cut to predetermined lengths being transferred to the supply conveyor via the corresponding slide conveyors and the turning conveyor and sequentially supplied to the forming drum body, at each of the stock positions, when the one of the supply units stocked with the tire materials becomes empty, the tire materials fed out from the other of the supply units and cut to predetermined lengths being transferred to the supply conveyor via the corresponding slide conveyors and the turning conveyor and sequentially supplied to the forming drum body, and while the tire materials from the other of the supply units are being supplied to the forming drum body, the one of the supply units that is empty being replaced with a new one of the supply units stocked with the tire materials.
The system for supplying a tire material to a forming drum body according to claim 1, wherein the forming drum body and the supply conveyor installed at the predetermined certain positions and the one of the supply units at one of the stock positions are arranged in series.
The system for supplying a tire material to a forming drum body according to claim 2, wherein at each of the stock positions, when the one of the supply units stocked with the tire materials becomes empty, the tire materials are supplied from the new one of the supply units to the forming drum body upon completion of work of replacing the one of the supply units that is empty with the new one of the supply units stocked with the tire materials.
The system for supplying a tire material to a forming drum body according to any one of claims 1 to 3, wherein the predetermined angle is 85 degrees or more and 95 degrees or less.
The system for supplying a tire material to a forming drum body according to any one of claims 1 to 4, wherein each of the tire materials fed out from the supply units at the respective stock positions and cut to predetermined lengths is continuously supplied to the forming drum body, an entire length and a widthwise position over the entire length of each of the tire materials cut to the predetermined lengths are detected by a sensor while the tire materials are conveyed from the turning conveyor to the supply conveyor, and when each of the tire materials is wound around the forming drum body, a rotation speed and a widthwise position of the forming drum body are adjusted based on entire length data and widthwise position data over the entire length of each of the tire materials detected by the sensor.
A method of manufacturing a tire, the method comprising: by a forming device comprising the system for supplying a tire material to a forming drum body according to any one of claims 1 to 5, forming a green tire using the tire material; and vulcanizing the green tire.

Description

Technical Field The present invention relates to a system for supplying a tire material to a forming drum body and a method of manufacturing a tire and particularly relates to a system for supplying a tire material and a method of manufacturing a tire that can make a tire forming device compact, further reduce time loss due to replenishment of tire material, and efficiently supply multiple types of tire materials to one forming drum body. Background Art A tire is manufactured by vulcanizing a green tire. A green tire is formed by layering a number of types of tire materials. The green tire is formed by integrating, for example, an innerliner, a carcass material, a belt member, a tread rubber, and a pair of bead members, on a forming drum. Various servicers for supplying a number of types of tire materials to a tire molding machine have been proposed (see, for example, Patent Document 1). The servicer proposed in Patent Document 1 includes a plurality of sets of a material holding portion in which each tire material is stocked in a wound state and a movable conveyor, the plurality of sets being slidably movable along a rail. Sliding the desired set allows the desired set to be arranged in series with a fixed-position conveyor and a tire molding machine installed at predetermined positions. The tire material is then fed out from the material holding portion of the set and supplied to the fixed-position conveyor and the tire molding machine via the movable conveyor. This servicer can replace, by sliding the set emptied of tire material to a standby position, the material holding portion with a new material holding portion with tire material wound while tire material is being supplied from another set. Therefore, the tire material can be supplied to the tire molding machine without long time loss due to replenishment of tire material. To supply multiple types of tire materials to one tire molding machine, however, it is necessary to prepare a set of the material holding portion and the movable conveyor for each type of tire material and install each set slidably along the rail. Since a large space is required to slide a number of sets, it is difficult to make the forming device compact. In addition, since the set of the material holding portion and the movable conveyor is not light in weight, it is difficult to quickly slide the set. This is disadvantageous in reducing time loss due to replenishment of tire material and is also disadvantageous in quickly supplying the respective tire materials to the tire molding machine. Thus, there is room for improvement in making a tire forming device compact, further reducing time loss due to replenishment of tire material, and efficiently supplying multiple types of tire materials to one forming drum body. Citation List Patent Literature Patent Document 1: JP 2000-25124 A Summary of Invention Technical Problem An object of the present invention is to provide a system for supplying a tire material to a forming drum body and a method of manufacturing a tire that can make a tire forming device compact, further reduce time loss due to replenishment of tire material, and efficiently supply multiple types of tire materials to one forming drum body. Solution to Problem To achieve the object described above, a system for supplying a tire material to a forming drum body of an embodiment of the present invention includes a supply unit in which a tire material having a band shape is wound and stocked; a forming drum body; and a supply conveyor arranged between the supply unit and the forming drum body and has a configuration in which the tire material is fed out from the supply unit and is cut into tire materials each having a predetermined length and the tire materials are placed flat on the supply conveyor, supplied to the forming drum body, and formed into a cylindrical shape by being wound around the forming drum body. A plurality of the supply units arranged side by side are at a plurality of respective stock positions, the tire materials fed out from the supply units at adjacent stock positions are of different kinds, each of the supply units are arranged such that supply directions of the tire materials intersect each other at a predetermined angle, slide conveyors configured to slide in a parallel direction of each of the supply units are provided at the respective stock positions, a turning conveyor configured to turn in a plan view is provided between each of the slide conveyors and the supply conveyor, for the forming drum body and the supply conveyor installed at predetermined certain positions, the tire materials fed out from one of the supply units at each of the stock positions and cut to predetermined lengths are transferred to the supply conveyor via the corresponding slide conveyors and the turning conveyor and sequentially supplied to the forming drum body, at each of the stock positions, when the one of the supply units stocked with the tire materials becomes emp