Ejector Punches with Locating Dowel Holes - HX Coating

Injection mold ejection systems use these ejector punches to transfer force from the ejection mechanism to the molded part with stable punch-to-plate alignment. The locating dowel holes help maintain repeatable positioning between punches and the ejector plate, reducing the risk of scuffing or uneven ejection in long production runs.

• Automotive connector and bracket tooling: high-cycle ejection benefits from the HX coating, which is intended to reduce wear under abrasive, continuous contact conditions.
• Consumer electronics housings: the locating features improve alignment consistency across multiple cavities, helping protect tight-tolerance part surfaces during part release.
• General-purpose multi-cavity dies: spring-reinforced or standard variants support robust operation when there are packaging constraints and frequent maintenance intervals.

Choose the tip shape and shank diameter to match the part release geometry while relying on the dowel holes to keep ejection behavior consistent.

The provided series information does not specify a steel grade or numeric heat-treatment hardness (e.g., HRC), so material properties are best treated as application-dependent for this listing.

• Coating (HX): HX coating is used to reduce wear during high-volume production where ejector punches experience repeated sliding/impact cycles against ejector plate and wear surfaces.
• Manufacturing approach: ejector punches with precision dowel-hole location are typically produced by turning/grinding for diameter and length control, followed by coating application for wear reduction.
• Trade-off: wear resistance from the coating supports longevity, while dimensional stability depends on correct sizing and maintaining clearances in the ejector plate.

If your build requires a known wear/toughness balance, request the exact steel specification and heat-treatment condition for the selected variant of this series.

Correct selection of an ejector punch is primarily about matching the shank diameter (D = 10 ~ 45 mm) and the working tip geometry to your cavity/core and ejection stroke design. Use the tip dimension (P = 3 ~ 35 mm), tip length (B = L, S, X), and tip width (W = 3 ~ 9 mm) to match the part’s release feature and prevent localized stress concentrations.

• Length selection: choose L (L dimension) from 70~120, 60~120, 80~120, or 100~120 depending on the required overall punch travel envelope.
• Full-length change (LC = 34 ~ 72) and tip change (PC = 2.8 ~ 30) should be checked against your expected dimensional changes from assembly and any controlled wear allowance.
• Corner radius: select R = 0.15 mm to support consistent contact without sharp edges.

Because locating dowel holes are part of alignment, ensure the ejector plate’s dowel-hole pattern matches the series’ locating design, and validate fit with your plate and stripper design tolerances.