Skip to contentFor tall core pins, you cannot drill horizontally. Use a (a vertical plate inside a drilled hole) or a bubbler (a small tube that jets water to the bottom of the pin). If you ignore this, the core pin will overheat, and the plastic will stick.
What are you using? (e.g., ABS, Nylon, Polycarbonate) Is this for high-volume production or prototyping ? Do you need advice on undercuts and lifters ?
Snap-fits eliminate screws, but they require strain management.
Your material dictates steel type, vent depth, and surface finish.
: These are the channels that deliver material from the injection nozzle to the gates. Efficient runner design minimizes material waste and pressure drop. Ejection System : Once the part is cooled, mechanical ejector pins
Injection Mold Design Guide [portable] Jun 2026
For tall core pins, you cannot drill horizontally. Use a (a vertical plate inside a drilled hole) or a bubbler (a small tube that jets water to the bottom of the pin). If you ignore this, the core pin will overheat, and the plastic will stick.
What are you using? (e.g., ABS, Nylon, Polycarbonate) Is this for high-volume production or prototyping ? Do you need advice on undercuts and lifters ? injection mold design guide
Snap-fits eliminate screws, but they require strain management. For tall core pins, you cannot drill horizontally
Your material dictates steel type, vent depth, and surface finish. What are you using
: These are the channels that deliver material from the injection nozzle to the gates. Efficient runner design minimizes material waste and pressure drop. Ejection System : Once the part is cooled, mechanical ejector pins