Draft Angle Design: Getting the Taper Right for Smooth Part Ejection   Draft angle seems like a minor detail in mold design, but it causes more ejection problems than almost any other factor. I have debugged many molds where the parts stick in the cavity or core, and in nearly every case the root cause traces bac… Read More

Cooling accounts for roughly two-thirds of the total cycle time in injection molding. A mold that cools efficiently produces parts faster, with better dimensional stability and fewer warpage issues. Yet cooling channel design is often given the least attention during the mold design phase, falling behind cavity cutting and ejection system work. The… Read More

The gate is one of the smallest features in an injection mold, but it plays an outsized role in determining part quality. It is the point where molten plastic enters the cavity, and its size, shape, and location influence everything from fill pattern to cosmetic appearance to residual stress in the finished part. Getting the gate right can mean … Read More