METHOD AND DEVICE FOR CALCULATING VISCOSITY OF RESIN FOR INJECTION MOLDING

• Main Author: YAMAGATA HIROAKI
• Format: Patent
• Language: English
• Published: 15.01.2004
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a method for precisely obtaining the viscosity of a resin used in the simulation of an injection molding process. SOLUTION: In addition to the viscosity at a high temperature, and in a high shear region which can be measured by a rheometer, the viscosity in a low shear rate region estimated from the frequency responsiveness of viscosity at a low temperature obtained by a dynamic viscoelasticity measurement device 2 is added. A part 3 in which viscosity values at temperatures and shear rates in a wide range are calculated, and they are subjected to a function approximation is included. The shearing viscosity values in a wide temperature range region and in a shear rate region are provided. COPYRIGHT: (C)2004,JPO