An extrusion head arrangement has a plurality of extrusion heads arranged next to one another along a transverse axis. Each extrusion head has a housing with at least one flow channel for forming a strand of extrudable plastic in the direction of a longitudinal axis. The housing has an outer housing part extending along the longitudinal axis with an outer circumferential surface. A longitudinal bore parallel to the longitudinal axis is arranged in the outer housing part. The outer circumferential surface of the outer housing part has an oval cross-section with a largest diameter and a smallest diameter. The extrusion heads are arranged next to each other with the smallest diameters parallel to the transverse axis. The longitudinal bores are each arranged on a diameter deviating from the smallest diameter.
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.
1212122) is arranged in the housing outer part (4), wherein in each case the outer circumferential face (20) of the housing outer part (4) has an oval cross section with a greatest diameter (D) and a smallest diameter (d), wherein the extrusion heads (1, 2) with the smallest diameters (d) are arranged in succession parallel to the transverse axis (Q), and wherein the longitudinal bores (23) are each arranged on a diameter deviating from the smallest diameter (d).
The invention relates to a breaker plate (1) for a breaker (40) for supplying thermoplastic melts to at least one extrusion head (61) for producing a preform, wherein the breaker plate (1) comprises: a first plate face (2) and a second plate face (3); a breaker groove (7), which is formed in the first plate face (2) and extends in a plate plane (E1) of the first plate face (2); and at least one connection channel (9), which is connected to the breaker groove (7), is formed in the breaker plate (1) and ends in each case at an outlet opening (10) in the second plate face (3); characterised in that the at least one connection channel (9) is milled into the breaker plate (1) and has, in the flow direction, a course which is curved at least in sections towards the second plate face (3). The invention also relates to a method for producing a breaker plate (1). The invention also relates to a breaker (40) and to an extrusion assembly (60).
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.
Ring-type distributor (1) for a parison extrusion die for producing a tubular blank from thermoplastic material, wherein the ring-type distributor (1) comprises the following: a receiving body (2) having a first receiving space (6) with an inner surface (7), a first distributor sleeve (5) with an outer surface (10), which has a distributor groove (1), wherein the first distributor sleeve (5) is received in the first receiving space (6), and also an annular first distributor space (12), which is formed between the inner surface (7) of the first receiving space (6) and the outer surface (10) of the first distributor sleeve, and which opens out into an annular slit (13), wherein the outer surface (10) of the first distributor sleeve (5) has a single helical distributor groove (11) with more than one turn and less than 1.25 turns.
Extrusion head (1) for producing tubular preforms from extrudable plastic, which are made up of at least a 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 the first layer, wherein the first flow channel (17) is fed from the first manifold (15), • a second flow channel (21) with an annular second outlet opening (22) for producing the second layer, wherein the second flow channel (21) is fed from the second manifold (19), and • a mixer (27) within the second flow channel (21) with a connection (54) for introducing a blowing gas.
b) 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).
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