Patent ID: 9486959
Filing Date: 2016-11-08
CPC Classification: B29B,B29C,B29K,B29L,B32B

Claim Text:
1. A method for producing a laminate comprising: a first step of rolling rubber material extruded from a first rubber extruder with a first pair of rollers to form a first sheet-shaped member; a second step of layering and rolling the first sheet-shaped member and a second sheet-shaped member supplied from an original material to contiguously produce a laminate having the first sheet-shaped member and the second sheet-shaped member laminated therein; and a gap between the first pair of rollers being controlled based on a detection result of a thickness d wherein: the laminate is a conveyor belt including a belt core body, a first cover rubber laminated on one surface of the belt core body, and a second cover rubber laminated on another surface of the belt core body, the first sheet-shaped member is the first cover rubber, the second sheet-shaped member is a first intermediate laminate having the belt core body and the second cover rubber laminated therein, the laminate further includes an ear rubber arranged on both side sections of the belt core body in a width direction between the first cover rubber and the second cover rubber, before the second step, a third step is performed of rolling the ear rubber extruded from a second rubber extruder with a third pair of rollers to be laminated on the second cover rubber of the second sheet-shaped member at both side sections of the belt core body in the width direction to form a second intermediate laminate, in the second step, the second intermediate laminate, including the second sheet-shaped member, and the first sheet-shaped member are laminated, in the second sheet-shaped member, a width of the belt core body is less than a width of the second cover rubber and a band-like ear rubber placement surface on which the belt core body is not positioned is formed to have dimensions corresponding to a width of the ear rubber at both sides in the width direction of a surface of the second cover rubber having the belt core body laminated thereon, a positioning structure is provided for positioning the ear rubber extruded from the second rubber extruder in the width direction of the second cover rubber with respect to the ear rubber placement surface of the second sheet-shaped member, and the positioning of the ear rubber is controlled by the positioning structure based on a detection result of positions P