The function of thread opening: The threaded opening is a key part for matching with the bottle cap to achieve sealing. Through precisely designed and processed threaded openings, they can be closely matched with the bottle cap, ensuring that the bottle has good sealing during packaging, storage and transportation, and preventing liquid or gas leakage. The accuracy of the thread opening directly affects the quality of the bottle preform and the final bottle.
Accurate whorl size and shape can ensure the tightness and stability of the bottle cap and the bottle body, avoiding problems such as untightening and loosening of the bottle cap.
Easy to release: After injection molding of the bottle, the bottle must be successfully removed from the mold. The design of thread openings requires the convenience of demolding. Through reasonable thread structure and demolding method, such as the use of a rotary demolding mechanism, the bottle preform can be removed from the mold without damaging the thread, thereby improving production efficiency.
The material for making whorl openings is usually selected as good quality steel. Like, P20 steel S136 steel and H13 steel.These materials have good corrosion resistance steel, which can prevent the thread opening from being corroded and rusted, avoid problems such as increasing surface roughness and decreasing dimensional accuracy caused by corrosion, and ensure stable quality of the bottle preform.
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