Why Thread Top Burrs Frequently Occur in High-Speed Aluminum Cap Production

Many packaging manufacturers pursue high output by running aluminum cover thread rolling machines at accelerated speeds, yet most find it tricky to avoid tiny burrs on thread tooth tops during mass high-speed production.

In actual production tests, when the rolling speed exceeds 180 pieces per minute, the instantaneous metal extrusion force rises sharply. The aluminum alloy material fails to complete uniform flowing and shaping in a short time, leaving excess metal residue gathered on the top of thread teeth, forming fine irregular burrs.

These subtle burrs are easy to ignore but cause many problems, they affect the tightness of bottle cap assembly and raise product rejection rates. Traditional manual polishing takes around 3-5 seconds for each piece, which seriously drags down production efficiency and fails to support large-scale continuous orders.

With years of experience in packaging machinery manufacturing, we have targeted this common high-speed production pain point, we upgraded the original thread rolling tooth profile structure and adjusted the mechanical feeding and rolling matching angle.

This optimized design effectively guides even metal flowing during ultra-fast rolling, it greatly reduces thread top burr generation without lowering production speed. For most aluminum cap and anti-theft cap production lines, this improvement can stabilize finished product quality and cut down post-processing workload significantly.