Visualization in SIGMASOFT of the particle concentration over the length of an injection molded micro-specimen for tensile testing.
SIGMA Plastic Services, Inc., Schaumburg, IL, offers expansions in the functionality of its 3D injection simulation software SIGMASOFT. A focus of the latest developments is the simulation of micro-molded applications and the integration of nano-composites.
"Nano-composites influence the rheology of plastic melts significantly. By improving the melt fluidity, processing at lower temperatures is possible. Furthermore, the part properties can be tailored by using nanoparticles as reinforcement. However, these advantages can only be reached if the nanoparticles achieve the desired distribution in the cavity and if no particle-segregation occurs as a consequence of flow effects," said a company spokesperson.
"The nanoparticle distribution should be considered early, during part and mold design. Therefore, a new model was integrated into the injection molding simulation software SIGMASOFT, which now makes it possible to simulate and analyze the local particle distribution and thus define clear guidelines for the design of part, mold and runner system," said the spokesperson.
"An interesting field of application for nano-scale particles is the property modification in micromolding applications. Due to the significant variation in proportions between the size of the part and the size of the mold, micro-injection molding exhibits particular thermo-rheological effects, which are ignored in the conventional modeling available for the injection molding simulation of macro-applications. Particularly, the thermal interaction between mold and melt on the nano-scale must be considered and defined exactly from the physical point of view. The solver technology of SIGMASOFT was extended and validated to consider these nano-scale-induced effects," said the spokesperson.
The results were obtained as part of the German BMBF research project, "Process Development for the injection Molding of Nano-composites for the serial production of micro- and macro-applications."
For more information contact:
SIGMA Plastic Services Inc.
10 N. Martingale Rd., Ste. 425
Schaumburg, IL 60173