초록 ▼

An apparatus (10) wherein extruded strips (98,116) of elastomeric material are fed separately over a cylindrical roller surface (20) at more than one angular position (126,128,130) relative to the roller (18) by a die head (12) to form predetermined cross-sectional areas of the co-extrusion (118). T

An apparatus (10) wherein extruded strips (98,116) of elastomeric material are fed separately over a cylindrical roller surface (20) at more than one angular position (126,128,130) relative to the roller (18) by a die head (12) to form predetermined cross-sectional areas of the co-extrusion (118). The channels (26,28,36,38) in the die head guide plate (32) connecting the extruders (14,16) and the orifices (30,40) at the roller surface (20) are provided by walls of a replaceable preformer insert (44) which are spaced from the walls of an opening (42) in the guide plate (32). Different sizes and configurations of the channels (26,28,36,38) can be obtained using different preformer inserts (44). The grooves (80,88,90,114,132,134,138,151,152,154) which guide the strips (98,116) of elastomeric material applied to the roller surface (20) are in replaceable finish dies (66,68) mounted in a slot (70) in the cylindrical surface (22) of the die head (12) so that the various laminations and configurations required can be obtained by inserting the desired finish dies (66,68). Different finish dies (66,68) have grooves (80,88,90,114,132,134,138,151,152,154) at different positions to provide the desired overlapping of the applied strips (98,116).

대표청구항 ▼

A multiple orifice roller die extrusion apparatus for combining extrudable strips of elastomeric materials into a formed co-extrusion, said apparatus having a roller with an axis circumvented by a roller surface and means for rotating said roller about said axis, comprising die head means positioned

A multiple orifice roller die extrusion apparatus for combining extrudable strips of elastomeric materials into a formed co-extrusion, said apparatus having a roller with an axis circumvented by a roller surface and means for rotating said roller about said axis, comprising die head means positioned adjacent to and having a generally cylindrical surface conforming to said roller surface, a first orifice and a second orifice in said die head means at spaced-apart positions, said first orifice being located for applying at least a first strip of elastomeric material over said roller surface, said second orifice being located for applying at least a second strip of elastomeric material over said roller surface at said spaced-apart positions, said die head means including at least a first finish die replaceably mounted on said cylindrical surface, said first finish die having an indented edge forming said first orifice with a wall surface of said die head means and said first finish die having a first grooved surface for guiding the elastomeric material of at least said first strip after application over said roller surface to form a single co-extrusion of said first strip and said second strip.