Hidden Waste Caused by Unmatched Torque Value Between Batch Caps

Many cap manufacturers face a tricky problem: even batch products with perfect thread appearance often have scattered screwing torque values. In actual mass production, torque fluctuation exceeding ±5Ncm will hinder matching with automated capping equipment, which troubles most beverage and daily chemical packaging factories.

From our years of industry observation, most producers only fix torque issues passively. They usually make adjustments only after receiving customer complaints, which easily leads to 2%-4% of batch goods being rejected, causing shipment delays and extra rework costs for both suppliers and buyers.

Unlike common industry judgments, unstable roller pressure balance and varying aluminum coil extension rates are the key hidden causes behind batch torque deviation, rather than simple operational errors.

As a professional packaging equipment manufacturer, we have summed up practical pre-production debugging methods. Before formal mass production, we record and analyze torque test data in advance. We fine-tune the rolling pre-pressure moderately based on the hardness difference of different aluminum raw materials. This method can limit batch cap torque fluctuation to a more balanced range, effectively lowering the probability of equipment adaptation failures and after-sales problems for customers' automated packaging lines.