Method for manufacturing plastic bottle

Abstract

The invention discloses a method for manufacturing a plastic bottle. The method comprises an injection molding process, a blow molding process and a demoulding process, namely comprises the following steps of: at a first station, performing accurate injection molding on a bottle blank material to obtain a bottle neck part, stretching a bottle body to obtain a prefabricated bottle, and placing a mold core and the prefabricated bottle into a second station; at the second station, producing the plastic bottle in a blow mold by a blow molding method, wherein the blow mold comprises an accommodating cavity which cannot be subjected to blow molding and a cavity which can be subjected to blow molding, and the shape and the size of the accommodating cavity are matched with those of the bottle neck part; placing the bottle body in the cavity, and placing into a third station after the blow molding is finished; and at the third station, demoulding. The method is suitable for producing the plastic bottle which has high bottle neck molding accuracy and conveniently meets sealing requirements together with a bottle cap.

Description

technical field [0001] The invention relates to a manufacturing method of a plastic bottle. Background technique [0002] The Chinese patent application with the publication number CN101670659A discloses a mold equipment for injection stretch-blow plastic hollow container products and its process forming method. The mold equipment includes injection mold components, blow mold components and stretching devices. The process includes Injection molding process, blow molding process and stretching process, specifically: during the injection molding process, the movable mold and the fixed mold are closed, the mold is closed, the preform is injected, the movable mold and the fixed mold are opened, and after the mold is opened, it enters the blow molding process. The blow molding module is closed, and the preform is simultaneously stretched and blown to form a hollow container, and then the stretching device returns to its original position, and the blow molding module is opened to ...

AI Technical Summary

Problems solved by technology

Because the toner can’t get wet, it needs to be sealed and stored. However, most of the existing toner bottles are plastic bottles produced by blow molding. Due to the above reasons, they cannot meet the sealing requirements. The sealing method is usually to weld a layer of aluminum film on the mouth of the bottle for sealing. , using this kind of plastic bottle to pack toner not only needs a bottle cap, but also has an additional process of welding aluminum film and uses more aluminum film materials. It is difficult to uncover the aluminum film during use, and it is inconvenient to use

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