Method for producing a plastic article, and part of a blow-mould

摘要

A method for producing a plastic article includes extruding an approximately tubular blank from an extrudate and shaping the blank into a hollow body inside a blow-mold using differential pressure, wherein at least one insertable part is introduced into the interior of the partially molded plastic article before the latter is fully shaped into a finished plastic article, and the tubular blank is arranged between at least two halves of a blow-mold by means of an intermediate frame.

主权项

1. A method for producing a plastic article by extruding a tubular preform from an extrudate and forming the preform into a hollow body inside a blow molding tool having at least two halves by applying differential pressure, the method comprising the steps of:
arranging an intermediate frame in the tubular preform, arranging the tubular preform between the at least two halves of the blow molding tool using the intermediate frame, partially preforming the tubular preform in the blow molding tool with the aid of blowing nozzles in the intermediate frame, thereby producing a partially preformed article, after said step of partially preforming, separating the partially preformed article into a separated preform having at least two parts, opening the blow molding tool such that one of the at least two parts of the separated preform remains in each half of the blow molding tool, removing the intermediate frame between the at least two halves of the blow molding tool, introducing at least one insert into an interior of the partially preformed article, closing the blow molding tool with the at least two parts of the partially preformed article and the at least one insert, and fully shaping the partially preformed article into the hollow body to form the plastic article.