DIN Standard TiCN Center Dowel Ejector Punches

Center dowel ejector punches are used in injection mold tooling where repeatable alignment between the ejector system and the moving part is critical. This DIN-style variant with a locating dowel hole is commonly specified for automotive connector and terminal molds, helping the punch guide the part during ejection to reduce tilt and scrape marks.

• Automotive connector molds: the locating dowel hole supports stable center alignment under cyclic ejector load.
• Medical device housings: TiCN-coated contact surfaces improve wear resistance for consistent ejection in production runs.
• General consumer electronics: the metric shank interface supports reliable assembly across standard tool layouts.

Designed for both standard and spring reinforced ejector setups, the hardened tool steel body maintains punch positioning during press operation while the stepped shank geometry assists stable mounting.

This series uses tool steel equivalent to SKD11 (D2 equivalent), selected for a balance of hardness and toughness suitable for ejector punches. The working surfaces are TiCN (XCN) coated, which increases wear resistance where sliding and repeated contact occur during ejection.

• Heat treatment: hardened tool steel construction (per series specification approach for SKD11/D2-equivalent tools), typically used in quenched & tempered condition for dimensional stability and durability.
• Hardness & wear/toughness trade-off: higher hardness improves abrasion resistance from mold steel/part contact, while maintaining enough toughness for cyclic press loading in both standard and spring reinforced ejector systems.
• Coating role: TiCN helps reduce surface wear and micro-abrasion, extending service life compared with uncoated tool steel in long-run production.

Select dimensions by matching the punch shank, tip geometry, and overall length to the mold’s cavity/core and ejector plate layout. The shank diameter D is available from 10 ~ 45 mm, and should be chosen to fit the corresponding guide/bushing and mounting bore without excessive clearance. The tip dimension P ranges from 3 ~ 35 mm, and must correspond to the part-supporting interface area in the tool.

• Length: L = 60 ~ 100 mm and LC = 34 ~ 72 mm govern stroke penetration and retention; pick values so the punch reliably reaches the ejecting surface without bottoming.
• Tip size revisions: PC = 2.8 ~ 30 mm, and corner radius R = 0.15 mm are critical for avoiding stress concentration at the ejector contact.
• Step/flat geometry: tip shape options include round, rectangle, oblong, double flatted round, and radius rectangle; ensure W/WC match the part clearance envelope (W = 3 ~ 9 mm, WC = 2.8 ~ 8 mm).

While these sizes are configurable within the stated ranges, always verify fit with your specific ejector guide and dowel alignment features; keep clearances consistent with your tool’s tolerancing strategy.