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

摘要

The invention relates to a tyre strip extrusion apparatus for producing tread and/or side strips for tyres, having a first extruder (12.1) which has at least one first screw (14.1) with a first screw longitudinal axis (L14.1), a second extruder (12.2) which has at least one second screw (14.2) with a second screw longitudinal axis (L14.2), a third extruder (12.3) which has at least one third screw (14.3) with a third screw longitudinal axis (L14.3), at least one fourth extruder (12.4) which has at least one fourth screw (14.4) with a fourth screw longitudinal axis (L14.4), and an extrusion head (18) with a head housing (20) which has at least four feed openings (38.i) which are connected to in each case one associated extruder (12.i) for the feed of extrusion material, and having an injection-moulding tool (22) for the moulding of an extruded web from the extrusion materials, which injection-moulding tool is connected to the head housing (20), has an outlet opening (26) and is arranged such that extrusion material fed through the feed openings (38.i) can be conducted along a respective material path to the outlet opening (26), wherein at least the majority of the extruders (12.i) and the head housing (20) are designed such that the screws (14.i) of the respective extruder (12.i) are removable while the head housing is stationary relative to the extruders, wherein the injection-moulding tool (22) has a profile plate (24) on which the outlet opening (26) is formed. It is provided according to the invention that the injection-moulding tool (22) has a first extruder plate (28) and at least one second distributor plate (30, 32) which is arranged, upstream of the profile plate (24), relative to a material path, the first distributor plate (28) bears, along a first parting surface (46.1), against the head housing (20) and bears, along a second parting surface (46.2), against the second distributor plate (30), and the distributor plates are designed such that at least a majority of all material paths run through all of the parting surfaces.