A side-by-side comparison of two multi-material injection molding processes — when to use each and what each requires from the part design. Insert molding and overmolding are both multi-material injection molding processes that produce a single molded part integrating more than one material. Engineers frequently ask which manufacturing process to use between overmolding and insert

A guide to SPI standards, Mold-Tech textures, and how to specify the right surface finish for your injection molded part. The surface finish of an injection molded part is determined directly by the surface finish of the mold cavity. Polish the mold to a mirror, and the molded part will have a mirror-like surface. Texture

Properties, advantages, disadvantages, and injection molding considerations for glass-fiber-reinforced nylon. Glass-filled nylon is polyamide reinforced with chopped glass fibers — typically 15%, 30%, or 50% by weight — that dramatically improve stiffness, strength, and dimensional stability compared to unfilled nylon. It is one of the most widely used engineering thermoplastics in injection molding for applications

Material properties, injection molding considerations, and applications for Delrin — one of the most dimensionally stable engineering plastics. Delrin is DuPont’s trade name for acetal homopolymer (polyoxymethylene, POM) — a semi-crystalline engineering thermoplastic that delivers exceptional dimensional stability, a naturally low coefficient of friction, high surface hardness, and excellent fatigue resistance. It is the material

12 design rules that reduce tooling cost, improve part quality, and shorten development cycles — from the engineers at Texas Injection Molding. Design for Manufacturability (DFM) in injection molding is the practice of designing parts with the constraints and capabilities of the injection molding process in mind from the beginning. Parts designed without DFM principles

Understanding tooling cost, piece price, and the key factors driving injection molding program economics. Injection molding cost has two distinct components that must be understood separately: tooling cost, the one-time investment to build the mold, and piece price, the per-part cost to run production. Conflating them leads to poor sourcing decisions — either over-investing in

Part design determines everything in injection molding. The shape of the part defines what the mold must do, what the process must achieve, and what the final production run and finished part can cost. Design decisions made before the mold is cut are essentially free to change. The same decisions after steel is cut can