Tyre strip extrusion apparatus for producing tread and/or side strips for tyres, and method for producing a tread or side strip of a tyre

A tyre strip extrusion apparatus for producing a tread and/or side strip for a tyre, comprising:

• a first extruder including a first screw which defines a first longitudinal axis;
• a second extruder including a screw which defines a second longitudinal axis;
• a third extruder including a screw which defines a third longitudinal axis;
• a fourth extruder including a screw which defines a fourth longitudinal axis;
• an extrusion head including a head housing having at least four feed openings which are connected to the first, second, third and fourth extruders in one-to-one correspondence for feed of extrusion material;
• and
• an extrusion moulding tool connected to the head housing, said extrusion moulding tool including a profile plate formed with an outlet opening which communicates with the feed openings so as to enable extrusion material to flow from the feed openings along respective material paths to the outlet opening for extruding a web from the extrusion material, a first distributor plate which bears against the head housing along a first parting surface, and a second distributor plate which is arranged upstream of the profile plate in a flow direction of the extrusion material, with the first distributor plate bearing against the second distributor plate along a second parting surface, said first and second distributor plates configured such that at least a majority of the material paths runs through the first and second parting surfaces,
• wherein the second distributor plate has a first guide channel which extends at least partially along a third parting surface of the second distributor plate downstream the second parting surface,
• wherein the second distributor plate has a bore, said first guide channel being connected to the bore,
• wherein the first guide channel has at an end facing away from the bore a branching point into a first channel branch and a second channel branch, so that extrusion material flowing out from the bore in the first guide channel flows in the flow direction downstream of the branching point into the first channel branch and into the second channel branch,
• wherein, at least partially along the second parting surface, the first distributor plate has a second guide channel connected to the bore and a third guide channel having three branches.