MODELING OF MULTICOMPONENT INJECTION MOLDING PROCESS OF THE POLYMER COMPOSITES
Jacek Nabiałek, Dariusz Kwiatkowski, Adam Gnatowski
Quarterly No. 4, 2010 pages 340-343
DOI:
keywords:
abstract In the paper results of computer simulations of the overmolding process of selected polymer composite were presented. At work the package of providing the engineering software CAD/CAM/CAE - I DEAS NX ver. 11 and simulation software Moldflow Plastics Insight ver. 6.1 were used. A molded part was used to the simulation, which contains elements: elastic frame and rigid body. Computer simulations were preformed for injection of body part and its overmolding with elastomer. Materials for which investigations were performed are: polypropylene composite with chalk Isofil H 40 C2 NAT (body) and thermoplastic elastomer SEBS Sevrene 3000-70A (frame). The results of the injection molding and overmolding simulation were presented in the graphical way. The hot elastomer influence on overmolding body was examinated. It is proved that bodys’ material will be partially plasticized again during overmolding process. Hot elastomer (temperature over 200°C) which overflows cold body causes body material passing into plastic state. We may assume that permanent connection frame with body will take place. Temperature, pressure and shear rate were analyzed. The analysis of simulation research results helps us assert that specialist computer programs let us predict appearance of phenomena specific for given molding process. Modern simulation programs ensure us true reality projection (if we assume that initial and border conditions which were entered are correct and that material data of processing composite is reliable). Simulation programs let us model wider and wider scale of polymer composites processing. The results of investigation have preliminary character. Cooling, shrinkage and warpage analysis will be planned within the limit of further research. The results of investigation became set against real process. Keywords:polymers composites, multicomponent injection molding, overmolding, computers simulation