Understanding the Effect of Pressure Losses on Injection Molded

The compressibility of plastics as a class of materials means the pressure punched into the machine control and the pressure the melt experiences at the end of fill within the mold will be very different. What does this difference mean for process consistency and part quality?

We can simplify the injection molding process by focusing on what the plastic “experiences” as it travels through the machine and into the mold. This perspective can be referred to as “injection molding from the plastic’s point of view” or scientific injection molding. When considering process, tooling, material and/or part design changes, it is useful to consider how the plastic will behave or respond.