Abstract: A manifold plate for a manifold for supplying thermoplastic plastic melt to at least one extrusion head for producing a preform is disclosed. The manifold plate includes: a first plate side and a second plate side, a distribution groove incorporated in the first plate side and extending in a plate plane of the first plate side, and at least one connecting channel adjoining the distribution groove, which is worked into the manifold plate and ends at an outlet opening in the second plate side. The manifold plate is characterized in that the at least one connecting channel is milled into the manifold plate and, in the flow direction, has a course which is curved at least in sections towards the second plate side. A manifold, an extrusion assembly and a method for manufacturing a manifold plate are also disclosed.

Abstract: Annular manifold for an extrusion parison head for manufacturing a tubular moulding from a thermoplastic material includes an accommodation body with a first accommodation chamber with an inner surface, a first distribution sleeve with an outer surface, which has a distribution groove, wherein the first distribution sleeve is accommodated in the first accommodation chamber, as well as an annular first distribution chamber, which is formed between the inner surface of the first accommodation chamber and the outer surface of the first distribution sleeve, and which ends in an annular gap opening, wherein the outer surface of the first distribution sleeve has a single helical distribution groove with more than one winding and less than 1.25 windings.

Abstract: Extrusion head 1 for manufacturing hose-like parisons from an extruded plastic material, which are made up from at least one first layer and a second layer, wherein the extrusion head 1 comprises the following: a first manifold 15 with a connection 2 for a first extruder, a second manifold 19 with a connection 8 for a second extruder 3, a first flow channel 17 with an annular first outlet opening 18 for producing a first layer, wherein the first flow channel 17 is fed by the first manifold 15, a second flow channel 21 with an annular second outlet opening 22 for producing a second layer, wherein the second flow channel 21 is fed by the second manifold 19, and a mixer 27 within the second flow channel 21 with a connection 54 for introducing a foaming agent.

Abstract: Extrusion head 1 for manufacturing hose-like parisons from an extruded plastic material, which are made up from at least one first layer and a second layer, wherein the extrusion head 1 comprises the following: a first manifold 15 with a connection 2 for a first extruder, a second manifold 19 with a connection 8 for a second extruder 3, a first flow channel 17 with an annular first outlet opening 18 for producing a first layer, wherein the first flow channel 17 is fed by the first manifold 15, a second flow channel 21 with an annular second outlet opening 22 for producing a second layer, wherein the second flow channel 21 is fed by the second manifold 19, and a mixer 27 within the second flow channel 21 with a connection 54 for introducing a foaming agent.

Abstract: A multiple extrusion head (1) for blow molding extrusion machines has a plurality of first extrusion heads (2) fixedly arranged side by side in a first row forming a first plane (3). A plurality of second extrusion heads (4) are fixedly arranged side by side in a second row forming a second plane (5) that extends parallel to the first plane (3). Per row, distributing devices (6, 6a, 6b) are provided with first distributing channels (7, 10) that are arranged in the first plane (3) and the second plane (5), respectively. The distributing devices (6a, 6b) are separated in the region of the first plane (3) and second plane (5), A third distributing device (15) is provided with third distributing channels (18) that are arranged in a third plane (16) extending at a right angle relative to the first plane (3) and to the second plane (5).