Specialized molding components designed to create internal undercuts and complex internal geometries that cannot be demolded with standard straight cores.

Collapsible core inserts mechanically contract during ejection to enable smooth part release while maintaining tight tolerances on internal features. Our SKD61 collapsible core inserts are custom precision mold components manufactured from hot-work tool steel known for its toughness, thermal fatigue resistance, and stability.

• Create internal undercuts without part damage
• Produce internal profiles requiring tight concentricity and repeatability
• Improve mold efficiency by reducing complex mechanisms
• Ideal for parts with internal locking features and smooth internal surfaces

• Excellent toughness to resist chipping and cracking
• Superior heat resistance and thermal fatigue performance
• Reliable heat treatment capability for optimal hardness
• Balanced machinability for precision fitting surfaces

• Precision CNC turning/milling for core components
• EDM/wire EDM for complex segment profiles
• Grinding for critical fits and guiding surfaces
• Heat treatment coordination for hardness and stability
• Fine finishing/polishing for forming and sliding interfaces

• Dimensional inspection reports available
• Material and heat treatment records upon request
• Traceability marking options for assembly management
• Assembly-level functional checking available

• Simplified mold mechanism reducing mechanical complexity
• Consistent internal features for improved part quality
• Improved ejection reliability with reduced part damage risk
• Longer service life under repeated motion cycles

To provide accurate pricing for SKD61 collapsible core inserts, please supply:

• 3D CAD (STEP/IGES) and 2D drawing (PDF/DWG)
• Internal feature details and undercut geometry
• Mold interface requirements and installation specifications
• Target hardness/heat treatment specifications
• Surface finish requirements for forming zones
• Expected resin type and production conditions
• Quantity requirements and lead time expectations