Extrusion parison head for discontinuous foaming
AssigneeW. Müller GmbH
InventorGuido KNIPP
Life of this patent
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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.
Claims19
Extrusion head for producing hose-like parisons from extrudable plastic, which are made up from at least a first layer and a second layer, wherein the extrusion head comprises the following:
- a first manifold with a connection for a first extruder,
- a second manifold with a connection for a second extruder,
- a first flow channel with an annular first outlet opening for producing the first layer, wherein the first flow channel is fed by the first manifold,
- a second flow channel with an annular second outlet opening for producing the second layer, wherein the second flow channel is fed by the second manifold, and
- a mixer within the second flow channel with a connection for introducing a foaming agent.
Dependencies are inferred from the claim text.