The Basics of Tapered Interlocks

摘要

When selecting the type,size and location of interlocks for an injection mold,base your decision on what you need them to do.They can align any two mating mold plates or component parts.They can protect fragile shutoffs.Or they can provide support to prevent deflection.Various types of interlocks are available to molders.None of them are the best at performing all three functions-align,protect and support.This article will discuss the oldest and most common types of interlocks-those with a tapered or angular shutoff.Let's first discuss why every mold needs interlocks.There is a clearance between leader pins and their bushings of 0.0015 to 0.0025 in.,and that's when they are brand-new.Unless you jig-grind the bore holes for the pins and bushings,there is going to be a slight misalignment due to the milling machine's positional and angular capabilities.