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:
Feb. 08, 2022
Filed:
Oct. 17, 2016
Maag Automatik Gmbh, Grossostheim, DE;
Horst Mueller, Leidersbach, DE;
Stefan Deiss, Harxheim, DE;
Frank Gloeckner, Aschaffenburg, DE;
Reinhardt-Karsten Muerb, Aschaffenburg, DE;
MAAG AUTOMATIK GMBH, Grossostheim, DE;
Abstract
The invention relates to a method for producing a plastic granulate (), in which a process fluid () is contained in a process chamber () where an underwater granulation takes place and the process fluid in the process chamber has a temperature greater than 120° C. A process pressure of at least 2.0 bar is obtained in the process chamber, at which a granulation of the plastic strands () into plastic granulate occurs. From the process chamber, a mixture () of process fluid and plastic granulate is diverted into a first cooling zone () during cooling of the plastic granulate, while maintaining the process pressure. In a first separating device (), the plastic granulate is separated from the process fluid under process pressure. In the process chamber, the process fluid has a temperature in the range from 120° C. to 160° C., and the process pressure obtained there is greater than the pressure of the vapour pressure curve of the process fluid. After separation from the process fluid in the first separating device, the plastic granulate is fed continuously in a line to a dealdehydization container ().