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Method for producing a plastic article and blow molding tool

  • US 8,951,461 B2
  • Filed: 06/22/2010
  • Issued: 02/10/2015
  • Est. Priority Date: 06/24/2009
  • Status: Active Grant
First Claim
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1. A method for producing a plastic article comprising the following method steps:

  • extruding an approximately tube-shaped stream of melted plastic through an extruder head to form an extrudate;

    dividing the stream of melted plastic that is inside the extruder head or separating the extrudate that is emerging, or has already emerged, from the extruder head to obtain a preform with an approximately C-shaped cross section;

    placing the preform between two halves of a blow molding tool;

    partially closing the blow molding tool and clamping the preform with slides that frame the cavity of the blow molding tool as mold spacers and form at least one opening;

    applying differential pressure to the preform to expand the preform into a hollow body within the partially closed blow molding tool;

    introducing at least one insert into the interior of the hollow body through an open side of the hollow body in the partially closed blow molding tool;

    closing the blow molding tool completely to form a pinch-off seam which at least partially surrounds the formed article.

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