チューブミル生産：コイルから完成チューブまでのガイド

A cosmetic tube sitting on a pharmacy shelf weighs about 12 grams. The raw coil strip that became it weighed roughly 12.5 grams. The difference — that 4% — represents everything the tube mill did: forming, welding, grinding, sizing, straightening, cutting, and verifying through a cascade of quality checkpoints that the finished product meets the dimensional tolerances and surface specifications your customer printed on the drawing. When a production run produces tubes that fail at the filling line because the OD is 0.2mm oversize, or tubes that trigger a pharmaceutical audit finding because surface roughness exceeds the specified Ra value, the root cause is almost always traceable to one of […]