Extrusion die device

Claim 1

An extrusion die device for extruding rubber material comprising, in combination, a die block having upper and lower die block sections secured to each other; a die attached to the front side of said die block and in alignment with the contacting line of said upper and lower die block sections; a plurality of passages including complementary channels formed on the upper surface of said lower die block section and on the lower surface of said upper die block section, said complementary channels extending to the rear side of said die and being merged with each other at at least a position spaced from the rear side of said die; a shaft rotatably supported by said upper and lower die block sections at the position where said complementary channels are merged with each other, said shaft extending outwardly of the die block and being manually rotatable at the outer end portion of said shaft; a vane secured to said shaft at said position, said vane extending to the rear side of said die to vary the relative amount of the rubber materials passing through said passages; fixing means for fixing said shaft at a predetermined position with a screw formed on the outer end portion of said shaft and a nut on said screw; graduation means on the external surface of said die block; and a pointer attached to said shaft to indicate the rotational position of said shaft on said graduation means.