Two Types Of Plastic Bottle Caps

There are two types of plastic bottle caps, one is inserted type and one is circular rotary type, the production of plastic bottle caps is first raw material color matching, then molding (compression molding, drop molding, injection molding), followed by cutting rings, which are divided into single piece and double piece.

A single-piece plastic bottle cap, the inner wall of the cap is provided with a thread meshing with the bottleneck thread, the top of the cap is provided with a ring-type short inner plug, and the inner wall of the cap body above the thread is provided with a protruding foil-type ring sealing strip, and the wing-type ring sealing strip is tilted downward to form an inclination angle with the inner wall of the cap body; The flap ring seal with an inclination angle is pre-folded upwards, and after the hem, the foil ring seal is either parallel to the top or inclined to the top while embedded in the outer upper part of the short ring plug.

It is composed of a fin type ring seal strip and a ring type short inner plug to form a cap sealing structure, through the bottle mouth and the bottle cap sealing structure squeezed each other, the sealing structure is deformed, so that the sealing structure of the bottle cap is close to and plugged the bottle mouth, and the ring short inner plug and the wing type ring sealing strip form two sealing barriers, making the seal more reliable.