| 摘要 |
<p>Deformation of a rubber member upon extrusion is prevented. A rubber extrusion die 1 includes an inflow opening section 3 through which rubber flows, a forming opening section 4 which forms and extrudes the rubber that flowed in, and a rubber flow path 5 connecting those. On an inner wall surface 5S of the rubber flow path 5, a profile line K in a vertical cross section and/or a horizontal cross section in a rubber-extruding direction, passes through an area outside a reference line J, resulting in a larger cross-sectional area of the rubber flow path 5 than that obtained by the reference line J. The reference line J is defined as a straight line between a rear end point P1, where the inflow opening section 3 intersects the profile line K, and a front end point P2, where the forming opening section 4 intersects the profile line K.</p> |
