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Mold ejector pin hole wear repair: a solution to ensure smooth ejection
Date:2025-11-21 15:17     Source:daokedao     Browse:25

The top needle hole of the mold is prone to wear and expansion due to the reciprocating friction of the top needle, which can cause the top needle to jam and the product to be damaged. Daokedao adopts micro melting technology to melt wear-resistant alloy coating on the inner wall of the top needle hole. The coating hardness is HRC60, and the wear resistance is increased by three times. The tolerance of the inner diameter of the top needle hole is controlled at ± 0.01mm, and the clearance between the top needle and the fitting is maintained at 0.005-0.01mm. The equipment is equipped with a fine spot laser head (0.1mm), which can accurately repair the top needle hole with a diameter of Φ 3- Φ 20mm. The single hole repair time only takes 15 minutes. After repair, the top pin jamming failure rate decreased from 20% to 1%, the product top injury rate decreased from 12% to 0.8%, and the mold ejection system life was extended to twice the original life, suitable for various injection and die-casting molds.

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