Process and Device for the Extrusion/Moulding of Thermoplastic Hollow Bodies
AssigneeInergy Auto. Systems Research (Societe Anonyme)
InventorBjorn Criel
Life of this patent
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Abstract
A process and device for extrusion/molding of thermoplastic hollow bodies using at least one extruder and at least two molds and including the extrusion of a flow of material, its cutting into parisons, and the molding of the parisons to produce the hollow body, alternately in the first mold and then in the second mold. The process may work in parallel for certain of its operations. The process and the device are well suited for producing hollow bodies of complex three-dimensional geometry with a high productivity.
Claims13
1-12. (canceled)
A process for extrusion/molding of thermoplastic hollow bodies, using at least one extruder and at least first and second molds, comprising:
- extruding a flow of at least one molten thermoplastic through an extrusion head of the extruder;
- cutting the flow of material so as to create parisons;
- molding each of the parisons into a hollow body, alternately in the first mold and then in the second mold, each of the molds including moving parts that cannot be positioned beneath the extrusion head;
- and
- using a preforming tool and a mechanical handling device, the handling device being separate from the preforming tool, such that the handling device takes hold of the parison and deposits the parison in the preforming tool, the same preforming tool transferring the preformed parison to one or other of the molds to mold a hollow body.
Dependencies are inferred from the claim text.