METHOD OF MOLDING COMPOSITE SHEET AND METHOD OF PRODUCING TIRE

• Main Author: ISHIZUKA HIROTAKA
• Format: Patent
• Language: English; Japanese
• Published: 24.10.2019
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a method of molding a composite sheet capable of molding a thin and high quality composite sheet F.SOLUTION: A method of molding of this invention includes a sheet correction step of: bringing a first rubber sheet S1 made of a first rubber composition G1 including base rubber consisting of butyl-based rubber as a main component into contact with a first correction roll 46a and spreading the first rubber sheet S1 in a width direction; and bringing a second rubber sheet S2 made of a second rubber composition G2 including base rubber consisting of natural rubber as a main component into contact with a second correction roll 46b and spreading the second rubber sheet S2 in a width direction. A contact surface 48a of the first correction roll 46a in contact with the first rubber sheet S1 is curved in a swelling manner toward the first rubber sheet S1, and a contact surface 48b of the second correction roll 46b in contact with the second rubber sheet S2 is curved in a swelling manner toward the second rubber sheet S2.SELECTED DRAWING: Figure 1 【課題】薄く高品質な複合シートＦを成形できる、複合シートＦの成形方法の提供。【解決手段】この成形方法は、ブチル系ゴムを主成分とする基材ゴムを含む第一ゴム組成物Ｇ１からなる第一ゴムシートＳ１を第一矯正ロール体４６ａに接触させて第一ゴムシートＳ１を幅方向に拡げ、天然ゴムを主成分とする基材ゴムを含む第二ゴム組成物Ｇ２からなる第二ゴムシートＳ２を第二矯正ロール体４６ｂに接触させて第二ゴムシートＳ２を幅方向に拡げる、シート矯正工程を含む。第一ゴムシートＳ１に接触する第一矯正ロール体４６ａの当接面４８ａは第一ゴムシートＳ１側に膨らむように湾曲しており、第二ゴムシートＳ２に接触する第二矯正ロール体４６ｂの当接面４８ｂは第二ゴムシートＳ２側に膨らむように湾曲している。【選択図】図１