Boss, Round & Inlay Core Pins

Standard straight and stepped pins cover the majority of injection molding requirements. However, certain cavity geometries and maintenance economics demand specialized forms.

Boss pillars require round core pins with specific proportions optimized for the boss diameter and wall thickness. Deep boss features frequently trap air, making gas release variants essential for these applications.

Inlay core pins address maintenance cost directly: only the worn tip insert is swapped, preserving the pin body. In molds running 500K+ shots where tip wear is the primary failure mode, this reduces per-replacement cost by 60-80%. The trade-off is slightly higher initial cost, which typically pays back within 2-3 replacement cycles.

Core sleeves serve as precision guide bushings and sacrificial wear interfaces, ensuring consistent pin alignment across millions of cycles while protecting the more expensive mold plate bore from enlargement.