Hybrid model and method for determining mechanical properties and processing properties of an injection-molded part

US6839608B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bahman Sarabi · Krefeld, DE
• Thomas Mrziglod · Wittlich, DE
• Klaus Salewski · Greifswald, DE
• Roland Loosen · Lechenich, DE
• Martin Wanders · Neschen, DE

Key dates

• Filing date: Apr 22, 2002
• Grant date: Jan 4, 2005
• Expiry date: Dec 24, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2945/76989
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method of predicting the properties (e.g., mechanical and/or processing properties) of an injection-molded article is disclosed. The method makes use of a hybrid model which includes at least one neural network. In order to forecast (or predict) properties with respect to the manufacture of a plastic molded article, a hybrid model is used in the present invention, which includes: one or more neural networks NN1, NN2, NN3, NN4, . . . , NNk; and optionally one or more rigorous models R1, R2, R3, R4, . . . , which are connected to one another. The rigorous models are used to map model elements which can be described in mathematical formulae. The neural networks are used to map processes whose relationship is present only in the form of data, as it is in effect impossible to model such processes rigorously. As a result, a forecast relating to properties including the mechanical, thermal and rheological processing properties and relating to the process time of a plastic molded article is obtained.