Before starting the automatic PET bottle making machine each day, the operator's first task should be to check all moving parts, especially the robotic arm grippers, guide rails, and mold opening and closing tracks. Appropriate lubrication should be applied if necessary; this is like warming up the machine, making the entire day's operation much easier. The reducer also needs to be checked regularly, ensuring the belt tension and the tightness of all connections – details that cannot be overlooked in daily inspections. The mold locking frame can be replaced with BX-120/A(ER) food-grade lubricating oil, which has proven very effective, extending the maintenance interval to once a week and improving equipment performance. Of course, regularly cleaning residual old oil stains is still essential.
The stability of the pneumatic system is crucial to the quality of blow molding. It's necessary to make it a habit always to confirm that the high- and low-pressure air sources are within the normal range before starting the machine. The air tank should ideally be drained daily; in humid weather, it may need to be drained every 4 hours; otherwise, accumulated moisture will reduce the sensitivity of pneumatic components. The solenoid valves should also be checked, ensuring the coil fixing nuts are not loose and that the air hoses are not kinked or leaking.
The segmented heating system and bottle mold maintenance of the automatic PET bottle making machine require extra care. Before each heating cycle, the operator must turn on the cooling water before powering on to prevent dry burning. A damaged heating coil is troublesome to replace and disrupts production. Dust in the heating chamber should be cleaned regularly; excessive dust accumulation can affect heat dissipation and temperature uniformity. When installing the mold, pay special attention to the correct orientation of the water-cooling pipe interfaces, and carefully adjust the position of the stretching rod. We generally follow the empirical stretching ratio of 1:2.5 to effectively prevent material accumulation at the bottom of the bottle or deformation of the bottle neck. Also, don't forget the air compressor in the workshop; regularly checking its oil level and air output stability can prevent many unexpected shutdowns caused by oil contamination. Maintaining the ambient temperature in the entire workshop at room temperature is also recommended, as this helps avoid neck bottle bulging when heated. These tips are practical, but for complex problems, it's safer to consult a professional technician.
