It was 2:00 AM in the tooling shop when Sam realized the prototype mold was short-shotting—again. The plastic wasn't reaching the end of the cavity. His boss's words echoed: "Read the guide. Then read it again."
Trapped gas burns plastic. Sam scribed 0.03mm deep vents along the parting line. Air escaped; parts filled. injection mold design guide
No more 6mm chunks next to 1mm ribs. Uniformity wins. He saw his mistake instantly—a thick boss starving a thin wall downstream. It was 2:00 AM in the tooling shop