Bottle cap Manufacturing
Ingredients Processing
Select appropriate plastic particles, such as polypropylene (PP), polyethylene (PE), etc., and inspect them to ensure that parameters such as purity and particle size meet the requirements. At the same time, antioxidants, UV absorbers and other additives can be added as needed.
Forming
Add plastic particles into the barrel of the injection molding machine and heat them to a molten state. The injection temperature of PP plastic is generally between 180℃ and 240℃. Then the molten plastic is injected into the mold cavity at a high pressure through the screw. During the injection process, parameters such as injection pressure, injection speed and holding time must be strictly controlled to ensure the molding quality of the bottle cap. For example, the injection pressure is generally adjusted according to the shape, size and complexity of the bottle cap. Too fast an injection speed may cause defects such as flash and bubbles on the bottle cap, while too slow an injection speed will affect production efficiency.
Finalize
The plastic cools and solidifies in the mold cavity to form the basic shape of the bottle cap. The cooling time will affect the dimensional accuracy and performance of the bottle cap, and generally needs to be reasonably controlled according to factors such as the type of plastic and the thickness of the bottle cap.
Post-processing
Including deburring and surface grinding, etc., to make the surface of the bottle cap smoother and improve its appearance quality and performance. Deburring can be done by manual trimming, mechanical grinding or chemical corrosion; surface grinding can be done by tools such as sandpaper, grinding wheel or polishing wheel. According to customer needs, printing can be done on the bottle cap, such as brand logo, pattern, text, etc. Commonly used printing methods include screen printing and offset printing.
Inspecting
Our rigorous quality control includes inspecting appearance, dimension, capacity, weight and stress tension to ensure that our bottles cap meet the highest standards.
