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US 2015/0306807 A1Published application
Method of producing a hollow body from thermoplastic material
AssigneeKautex Textron GmbH & Co. KG
InventorsMatthias BORCHERT, Klaus GEBERT
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Abstract
The invention relates to a method for producing hollow bodies from thermoplastic material comprising the shaping of at least one tubular preform or at least two two-dimensional, web-like preforms of plasticated thermoplastic material into a substantially closed hollow body, for example in the form of a fuel tank for motor vehicles.
Claims8
A method for producing a hollow body from thermoplastic material, comprising the following method steps:
- providing at least one preform of thermoplastic material on a multipart blow molding tool,
- introducing the preform into cavities of the blow molding tool,
- molding the preform into shells,
- joining at least one insert to at least one shell within the blow molding tool, the insert defining a part-volume that is closed off with respect to a main volume of the hollow body to be produced,
- joining together the shells by closing the blow molding tool and applying pressure to the main volume enclosed by the hollow body, wherein a pressure equalization with the part-volume is brought about parallel to the application of pressure to the main volume.
2 more elements
Dependencies are inferred from the claim text.