Manufacturing method of rubber sheet containing short fiber for transmission belt

摘要

PPROBLEM TO BE SOLVED: To provide a method for manufacturing a short fiber-containing rubber sheet for a driving belt by shredding the rubber sheet having the structure such that the orientation (the direction orthogonal to the extrusion direction) of the short fiber in the inner/outer surface layers is inferior to that of the inner layer into a plurality of laminar rubber sheets, so as to apply the laminar rubber sheet to the use for the compressed rubber layer of the driving belt. PSOLUTION: This method for manufacturing the rubber sheet containing a short fiber which is used for the driving belt comprises: a step in which the kneaded rubber 7 containing the short length fiber is extrusion-molded into a cylindrical molded body of the structure such that the short fiber is oriented in the circumferential direction while being oriented in the circumferential direction by an annular expansion die 15 of a conical shape formed by gradually expanding the diameter toward a discharge aperture, and a step in which a single rubber sheet 18 containing the short length fiber is obtained by cutting the cylindrical molded body apart in the extrusion direction and the cut rubber sheet 18 is shredded into laminar rubber sheets 53a and 53b through a straining and splitting process. PCOPYRIGHT: (C)2004,JPO