The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2001
Filed:
Jul. 07, 2000
Helmut Eckardt, Meinerzhagen, DE;
Jürgen Ehritt, Hilchenbach, DE;
Alfons Seuthe, Meinerzhagen, DE;
Michael Gosdin, Meinerzhagen, DE;
Battenfeld GmbH, Meinerzhagen, DE;
Abstract
A method and an apparatus are disclosed for producing plastic objects with solid regions and hollow regions. The method has the following steps: a) blocking off a part of the cavity (,) of a molding tool (,), so that little or no plastic melt can reach the blocked-off region (,); b) injecting plastic melt into the unblocked region (,) of the cavity (,) of the molding tool (,); c) releasing the blockage, so that plastic melt can reach the previously blocked-off region (,) of the cavity (,); d) injecting a pressurized gas into the melt by means of at least one fluid injection nozzle (,), so that the melt injected into the molding tool is distributed into the desired regions of the cavity (,) while forming a hollow space and is pressed against the cavity walls of the molding tool (,); e) allowing the molded part (,) to cool; f) relieving the cavity (,) of the pressure of the pressurized fluid; and g) demolding the molded part. The advantage achieved thereby is that solid regions and hollow regions are formed in the molded part in a predetermined manner.