Alpha Treatment Tapered Head Ejector Punch

This tapered-head ejector punch is used in injection mold tooling where repeated ejection demands stable sliding and predictable edge wear. The Alpha Treatment surface supports lower friction and improved oil retention, helping the punch maintain consistent movement over high cycle counts.

• Automotive connector and terminal molds: Suited for ejection systems that experience abrasive dust and frequent actuator movement; the treated microtexture reduces friction while supporting stable punch sliding.
• Consumer electronics housing molds: Helps maintain ejector performance during frequent part release, where minimizing wear-related geometry change supports consistent ejection force and part finish.
• General industrial multi-cavity molds: Works well in ejector-punch setups that require reliable tool life; the variant is engineered to boost surface hardness while maintaining toughness for punching-related durability.

Because the head is tapered, it aligns well with guiding/ejection behavior, reducing the risk of galling during start/stop operation.

The punch uses powdered high-speed steel equivalent to SKH51 (a common high-speed steel family used for wear-resistant cutting/punching applications). This variant is delivered with an Alpha Treatment surface process that nanocrystallizes the top layer, increasing hardness at the surface while aiming to preserve core toughness.

• Hardness & wear resistance: The nanocrystallized microtexture elevates surface hardness to improve wear performance under sliding and ejection conditions.
• Toughness trade-off: The process is intended to strengthen the surface without excessively embrittling the punch body, supporting reliable cutting-edge behavior during impact/punching cycles.
• Friction & lubrication: Microtexture reduces the coefficient of friction and supports oil retention, which improves consistency during repetitive tool strokes.

No additional heat-treatment state (e.g., quench & temper, nitriding) or numeric HRC value is specified in the provided data; selection should follow the supplier’s process documentation for the SKH51-equivalent delivery state.

Select the punch by matching the shank diameter (D) and the tip geometry to the ejector layout and the required contact area in the mold cavity/core. Available shank diameters are 8, 10, 13, 16, 20, 25 mm.

• Overall length: Use the fixed L = 60–100 mm range for package design and mold base thickness accommodation.
• Full length alteration (LC): Confirm compatibility with the available LC = 37–99.9 mm so the punch fully participates in ejection travel without bottoming.
• Tip dimensions: Choose P = 3–18 and the PC alteration based on the required tapered head contact and clearance. PC is offered in ranges: 1.5–2.99, 3–5.99, 5–9.99, 6.5–12.99, and 9–17.99.

When integrating into the guide system, ensure the chosen D supports the desired fit and sliding clearance of the ejector bore; the provided data describes selectable sizes but does not specify tolerances, so apply your standard ejector-punch fit criteria.