A device produces plastic pipes by extrusion, involving an extruder, a pipe head connecting to the extruder in production direction, having a base material, mandrel, and sheath. A melt channel, formed between the mandrel and sheath in production direction, promotes flow at least at the mandrel and sheath end, the mandrel and sheath being adjustable forwards and backwards relative to one another, and the outer mandrel surface and/or the inner sheath surface at least partially having a material with greater sliding capacity than the base material. Mandrel diameter at the end conically widens or narrows, and/or the mandrel end is curved so the diameter widens, narrows, or remains constant, and the inner sheath diameter at the end conically widens, narrows, or remains constant, and/or the sheath end is curved so the diameter widens or narrows, or two further surface sections, parallel and cylindrical, extend at the mandrel and sheath end.

A device produces plastic pipes by extrusion, involving an extruder, a pipe head connecting to the extruder in production direction, having a base material, mandrel, and sheath. A melt channel, formed between the mandrel and sheath in production direction, promotes flow at least at the mandrel and sheath end, the mandrel and sheath being adjustable forwards and backwards relative to one another, and the outer mandrel surface and/or the inner sheath surface at least partially having a material with greater sliding capacity than the base material. Mandrel diameter at the end conically widens or narrows, and/or the mandrel end is curved so the diameter widens, narrows, or remains constant, and the inner sheath diameter at the end conically widens, narrows, or remains constant, and/or the sheath end is curved so the diameter widens or narrows, or two further surface sections, parallel and cylindrical, extend at the mandrel and sheath end.

A novel tubular or profile shapes of co-extruded multilayer polymers. These materials contain tens to thousands of layers of milli-, micro- to nano-polymer layers. These new shapes contain contiguous layers of milli- to nano-polymer layers in three dimensions and these contiguous layers may be twisted or turned to further expand the potential microlayer geometries.

A head is disclosed for use with a manufacturing system. The head may have a housing configured to discharge a tubular structure reinforced with at least one continuous fiber and having a three-dimensional trajectory, and a cure enhancer operatively connected to the housing and configured to cure a liquid matrix in the tubular structure during discharge. The head may also have a nozzle configured to discharge a fill material into the tubular structure, and a wand extending from the housing to the nozzle.

A head is disclosed for use with a manufacturing system. The head may have a housing configured to discharge a tubular structure reinforced with at least one continuous fiber and having a three-dimensional trajectory, and a cure enhancer operatively connected to the housing and configured to cure a liquid matrix in the tubular structure during discharge. The head may also have a nozzle configured to discharge a fill material into the tubular structure, and a wand extending from the housing to the nozzle.

A novel tubular or profile shapes of co-extruded multilayer polymers. These materials contain tens to thousands of layers of milli-, micro- to nano-polymer layers. These new shapes contain contiguous layers of milli- to nano-polymer layers in three dimensions and these contiguous layers may be twisted or turned to further expand the potential microlayer geometries.

A rotating nozzle assembly for a die machine connectable to a dough extruder has a stationary sleeve with a first end having internal and external annular recesses and an annular stepped seating surface and a second end mountable in the die machine mounting plate. A nozzle has a first end rotatably disposed in the stationary-sleeve first-end internal annular recess, a second end and a radially outwardly-protruding annular ring between the first and second nozzle ends. A ring seal is disposed between the stationary-sleeve first-end annular stepped seating surface and the radially outwardly-protruding annular nozzle ring. A nozzle cap is fixedly attached to the stationary-sleeve first end. The nozzle is rotatably disposed in the nozzle cap. The nozzle second end extends beyond the nozzle cap. An annular stepped axial thrust bearing surface in the nozzle cap prevents relative axial movement of the nozzle while allowing rotation of the nozzle.

The invention relates to a multiple extrusion press head for producing tread profiles of tyres, comprising: a base body (12) having a first supply opening (22) for connecting a first extruder, a second supply opening (24) for connecting a second extruder, a third supply opening (26) for connecting a third extruder, and a fourth supply opening for connecting a fourth extruder; a first head part (14) which is mounted such that it can swivel in relation to the base body, and which has a receiving means (32) that is open in the direction of the base body (12); a second head part that is mounted such that it can swivel in relation to the base body (12); at least one flow channel insert (18, 20) that is mounted such that it can swivel in relation to the base body (12), wherein the first head part (14) and the second head part (16) can be brought into a closed state, in which the head parts (14, 16) are connected to one another in a pressure-tight manner, and a first flow channel (34), a second flow channel (36), a third flow channel (38) and a fourth flow channel (40) are formed in the multiple extrusion press head (10), wherein every flow channel is connected to a supply opening. According to the invention, the base body (12) has a fifth supply opening (30) for connecting a fifth extruder, and the multiple extrusion press head (10) has a second flow channel insert (20), which, independently of the first flow channel insert (18), is mounted such that it can swivel in relation to the base body (12), and borders a fifth flow channel (42) that is connected to the fifth supply opening (30).

The invention relates to a multiple extrusion press head for producing tread profiles of tyres, comprising: a base body (12) having a first supply opening (22) for connecting a first extruder, a second supply opening (24) for connecting a second extruder, a third supply opening (26) for connecting a third extruder, and a fourth supply opening for connecting a fourth extruder; a first head part (14) which is mounted such that it can swivel in relation to the base body, and which has a receiving means (32) that is open in the direction of the base body (12); a second head part that is mounted such that it can swivel in relation to the base body (12); at least one flow channel insert (18, 20) that is mounted such that it can swivel in relation to the base body (12), wherein the first head part (14) and the second head part (16) can be brought into a closed state, in which the head parts (14, 16) are connected to one another in a pressure-tight manner, and a first flow channel (34), a second flow channel (36), a third flow channel (38) and a fourth flow channel (40) are formed in the multiple extrusion press head (10), wherein every flow channel is connected to a supply opening. According to the invention, the base body (12) has a fifth supply opening (30) for connecting a fifth extruder, and the multiple extrusion press head (10) has a second flow channel insert (20), which, independently of the first flow channel insert (18), is mounted such that it can swivel in relation to the base body (12), and borders a fifth flow channel (42) that is connected to the fifth supply opening (30).

Aspects of the disclosure are directed to methods and apparatus involving the extrusion of polymers or other materials. As may be implemented in accordance with various embodiments, a polymer is delivered into an inlet of a nozzle structure having the inlet and an outlet. The polymer is viscously heated and melted by rotating the nozzle structure about an axis extending through the inlet and the outlet, therein facilitating extrusion of the melted polymer through the nozzle structure outlet. A polymer supply may deliver the polymer into the nozzle structure inlet, and a coupler may facilitation rotation of the nozzle structure. A driver may further operate to control rotation of the nozzle structure relative to the coupler, for instance by generating a rotational output that causes rotation of the nozzle structure.