Rubber extruder, rubber extrusion system, and rubber material feeding method

Abstract

To provide a rubber extruder, a rubber extrusion system and a rubber material feeding method, in which a strip-shaped rubber material can be safely fed with a simple structure. It is a rubber extruder 2 into which a strip-shaped rubber material G is fed. It comprises a circular cylindrical cylinder 5, a screw 6 disposed inside the cylinder 5, and a feeding section 7 located on an upstream side of the cylinder 5 in the extrusion direction D. The feeding section 7 comprises a feeding port 7b penetrating, in a radial direction of the cylinder 5, from the outermost outer surface 7a to an inner surface 5b of the cylinder 5. At the position of the feeding section 7 in the extrusion direction D, the screw 6 has a biting section 6a into which the fore-end portion Ga of the rubber material G to be fed is bitten. The distance L 1 from the outer surface 7a of the feeding section 7 to the biting section 6a is smaller than the opening width W of the feeding port 7b in the extrusion direction D at the outer surface 7a.

Dependencies are inferred from the claim text.