Injection Mold Design Guide Jun 2026

The foundational principle of any mold design guide is the avoidance of defects through proactive geometry. A novice designer might create a part that looks perfect on a computer screen, only to find it emerges from the mold with sink marks, warpage, or burn marks. The guide teaches that form must follow function under pressure . For example, design guidelines mandate uniform wall thickness. When a wall transitions from thick to thin, the thicker area cools slower, creating internal stress and visible sink marks. By adhering to the rule of maintaining consistent cross-sections—typically 1.5mm to 4mm depending on the resin—the designer ensures even filling, packing, and cooling. Without this singular rule, no amount of machine calibration can salvage the part.

Maintain a consistent wall by matching the internal radius with the external radius. 💡 Pro-Tip: The "Cooling" Factor injection mold design guide

To ensure a successful part, designers must adhere to three core pillars: . The foundational principle of any mold design guide

The runner system connects the machine nozzle to the cavity. Without this singular rule, no amount of machine

Uneven wall thickness is the primary cause of internal stresses, warping, and cosmetic defects.

An injection mold consists of two primary halves: the , which remains stationary, and the Core (B-side) , which moves with the clamping unit of the molding machine.