[Infographic] How Plastic Injection Molders Achieve Uniform Wall Thickness

If you look closely at any plastic injection-molded product — be it a toothbrush holder, electric razor housing, or phone case — you’ll notice how their walls are all relatively uniform. Achieving uniform wall thickness is one of the fundamental concepts of plastic injection molding. Ignoring it can result in sinking, warping, and even dysfunctional parts. With a range of functional requirements for consumer, medical, and industrial products, how can designers align the material flow and fill properties of plastic with the proper wall thickness?