NUMERICAL ANALYSIS OF SHRINKAGE AND DEFORMATION OF THE SAMPLES SENB PRODUCED WITH DIFFERENT PARAMETERS OF INJECTION MOLDING
Dariusz Kwiatkowski, Jacek Nabiałek, Adam Gnatowski
Quarterly No. 4, 2010 pages 307-311
DOI:
keywords: injection molding process, polymer composites, simulation calculation, volumetric shrinkage, warpage, polyamide 6
abstract Simulated calculations of volumetric shrinkage and deformation of samples SENB for PA6 and its composite with percentage of 25% of glass fiber type E were presented in this development. Simulation of injection process was carried out with help of specialist computer program MOLDFLOW PLASTICS INSIGHT version 4.1, but the three-dimensional model of moulded piece was made in the module MASTER Modeler from software package of computer program I-DEAS NX. For computer simulation the rheological model of Cross was used. For simulation of pressure phase and for defining of volumetric shrinkage and deformation of samples SENB knowledge of dependence p-v-T. In numerical calculations the equations of Tait was used. Curves of p-v-T were obtained from experimental researches made in a frame of own ground. Carrying out of simulation of injection process require data input concerning geometrical parameters of moulded piece, properties of processed plastic, conditions of injection process and data referring to injection machine into calculating program. Simulating researches were carried out on a base of made up the program of researches. The program was developed using the software package Statistica 6.0. Variation of the four conditions of injection process: pressure, pressing down, temperature of injection, speed of injection and mould temperature, was taken into consideration. The simulation was carried out for extreme parameters of injection process from arrangement 9 up to arrangement 17. In result of carried out computer simulations, extensive research material was obtained, which was subjected into detailed analysis in order to its adequate interpretation. It was necessary to present only selected results of simulating researches of injection process in graphical form.