Many observant consumers may notice a slight angular misalignment between the logo on the cosmetic tube cap and the tube itself. This is not a quality issue, but rather a result of a proper balance between equipment, control, and technology during production.
1. Equipment Precision:
Mechanical wear from long-term equipment operation, and fluctuations in workshop temperature, humidity, and air pressure further affect positioning accuracy;
With current industry technology, the highest positioning accuracy of assembly equipment is ±10℃. After considering various interferences, a reasonable deviation range of ±15℃ is formed, which is currently impossible to exceed.
II. Quality Control:
Full-process inspection: Real-time image capture by equipment visual sensors, hourly sampling and verification by IPQC, and full inspection of finished products upon warehousing. Products with deviations exceeding 15℃ are immediately reworked/scrapped.
A deviation of ±15℃ does not affect the neatness of the appearance and will not cause issues such as loose caps, leaks, or problems with opening and closing, balancing practicality and aesthetics.
Recording the equipment number and test data for each batch allows for timely investigation and adjustment of concentrated problems, minimizing deviation fluctuations.
III. Technical Adjustments:
Finding the "optimal solution" from the "impossible": The technical team stabilized the deviation within ±15℃ through targeted adjustments:
Parameters were entered according to hose specifications, and three trial production calibrations were performed before startup. Equipment was inspected and worn parts replaced monthly.
Injection parameters for the hose cap were adjusted, hose wall thickness uniformity was improved, and assembly pressing force and speed were optimized to reduce positioning interference.
Existing technology cannot achieve 100% precision. Forcing a "zero deviation" approach would lead to soaring costs and decreased efficiency. ±15℃ represents the optimal balance between technology, practicality, and cost.
