Block Core Pins
Block core pins in straight and flanged configurations for precise feature molding.
Block Core Pin Variants Comparison
Block core pins form internal rectangular features. The geometry of the pin base determines how effectively it can be secured and aligned in the mold.
| Base Type | Flanged (Standard) | Straight (Press Fit) | Keyed / Anti-Rotation |
|---|---|---|---|
| Retention Method | Captured by backing plate | Friction / Set screw | Flange with machined flat |
| Alignment Accuracy | High | Medium | Very High (Guaranteed orientation) |
| Machining Cost | Medium (requires counterbore) | Low | High (requires wire EDM flat) |
| Best Use Case | Standard square cores | Compact layouts | Asymmetrical features |
Application Scenarios
Connector Housings
Requires dozens of tiny rectangular cores to form terminal slots. Must perfectly align to prevent short shots.
Recommended:Keyed Block Core Pins (SKH51 High-Speed Steel)
Thick-Wall Structural Parts
Large rectangular cores that experience severe lateral injection pressure and shrinkage forces.
Recommended:Flanged Block Core Pins with R-Corners (Stress Relieved)
Design Rule: Always specify a minimum R0.2 corner radius on the base flange to prevent stress concentration and head breakage.
📖 In-Depth Technical Guide: Read our detailed engineering guide on Block Core Pin vs Cavity Insert Comparison →
Technical Resources
Need a Custom Quote?
Send your specifications and receive a quote. MOQ: 1 piece. Custom dimensions available.
✓ MOQ 1 piece✓ Custom dimensions✓ Typically replies within 24 hours