English
简体中文The latest industry news and exhibition information.
home / news / industry news / Perfume glass bottle cap and its sealing equipmentPerfume glass bottle caps are generally composed of a cover surface, a cover and a cover wall. When the cap is unscrewed, there are also cover claws and an elastic surface. The cap shoulder is the portion of the curve that curves downward on the outside of the cap. The cover wall is a vertical part on the side, and its surface is smooth, rough or grooved to help hold the cover tightly. In order to strengthen the rigidity and protect the edge of the cover, the lower ends of the unscrewed cover are curled inward.
On the entire curled circumferential plane, there are several claws protruding horizontally inward, that is, the cover claws, which are used to fasten the helix of the bottle. The ring surface floating in the center of the cover is an elastic surface, which is sunken when there is vacuum in the bottle, and floats when there is no vacuum. There are two: one is used to detect low vacuum or poorly sealed bottles on the factory production line. 2. For consumers to identify whether the bottle is in the original packaging or has been opened. The inner and outer surfaces of the cap are painted to increase the appearance and keep the inner metal from scratches or corrosion, and to stick the sealing gasket.
A rubber gasket or drip-injected plastic is placed on the inner side of the cap surface or the inner surface of the cap side, and is in close contact with the sealing surface of the bottle mouth to effectively seal the bottle mouth. Unscrew caps can be divided into low-temperature and high-temperature bottle caps according to the requirements of use and sterilization temperature, and are used for meat, vegetables and other adult foods. The diameter ranges from 43 to 89mm, and the commonly used domestic cover diameters are 63mm, 7mm, and 82mm. Among them, the specifications and dimensions of the 70mm unscrewed cap are shown in the national professional standard "ZBY73O18-87". Two additional professional standards for cap diameters are under approval.
The cover diameter is different, the number of cover claws is also different, 63mm and 70mm use four claws, and 82mm uses six claws. PVC plastic is usually dripped into the cover surface for sealing (see Figure 4. The stepped unscrewed cover has a special structure except for the cover shoulder, and the rest of the structure is the same as the unscrewed cover. It is used for baby food abroad and has not yet been developed in China.
The diameter of the cover is 48~53mm, and there is an elastic surface for measuring vacuum and anti-theft on the cover surface, so it is also called anti-theft cover, press-sealed twist-off cover, also known as PT cover, which is developed in recent years and widely used in baby food and children's food. Its characteristic is that the cap itself does not have steel claws, and the side of the cap and the inner surface of the cap wall are drip-injected with plastic, forming a seal with the bottle edge and side edge, and the center of the cap has an elastic surface for measuring vacuum and anti-theft.
