Webinar: The Role of Rheology in Injection Molding: Some Basic Considerations

Wednesday, December 1, 2021 | 10:00 - 11:00 AM EDT / 04:00 - 05:00 PM CET

This webinar will discuss the role of melt rheology in optimizing the material and design requirements of certain phases of the injection molding process. The rheological techniques and tests that generate the data used in basic calculations and in the simulation software for more complex computations are discussed as well.  

Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts. Of the many types of materials processed by molding, thermoplastics are by far the ones most used, with a variety of applications from basic consumer products to complex medical devices. With the range of materials and products, knowledge in all phases of the process is essential to ensure process efficiency and thus reduced manufacturing cost. Ultimately, the goal is to produce a part that is free of defects such as weld lines, voids, flow lines, warpage, etc. and meets all the properties for its end use.

Melt rheology plays a central role at various stages in the process of injection molding, starting with the reciprocating screw that generates the melt and then injects it through a nozzle into the sprue and runners and into the mold. Flow into the mold cavity takes on potentially added complications in that the correct amount of resin needs to be delivered while avoiding over-pressurization, high thermal stresses and residual orientation.

Presenter: Eric Bennett, Rheology Sales Manager West-MidAtlantic, NETZSCH Instruments North America LLC
Eric is a Rheology Technical Specialist at NETZSCH Instruments in Burlington, MA, USA, and has over three decades of experience in a variety of technical, technical sales and support and product management roles in material characterization and physical testing instrumentation. His focus on rheology started with working in the development of additives for polymer processing and continued with helping companies use rheology as a problem-solving tool. Eric has considerable knowledge in the use of rheology in polymers and plastics and has experience with a wide range of analytical technologies.  Eric has been a long-time member of the Society of Rheology and the Society of Plastics Engineers.