Deep-bottom PP square bottle one-step method injection blow molding mold and molding process

Abstract

The invention discloses a deep-bottom PP square bottle one-step method injection blow molding mold. The deep-bottom PP square bottle one-step method injection blow molding mold comprises an injectionmold body and a blow molding mold body, wherein the injection mold body comprises an injection upper mold plate, an injection upper cavity, an injection lower mold plate, an injection lower cavity, aninjection threaded upper neck block, an injection threaded lower neck block and a core rod, a square bottle injection mold cavity is formed among the core rod, the injection upper cavity and the injection lower cavity, a square bottle blank is injected in the injection mold cavity, the blow molding mold body comprises a blow molding upper mold plate, a blow molding lower mold plate, a blow molding upper cavity, a blow molding lower cavity, a blow molding threaded upper neck block and a blow molding threaded lower neck block, the core rod and a bottom mold body are arranged between the blow molding upper cavity and the blow molding threaded upper neck block and between the blow molding lower cavity and the blow molding threaded lower neck block respectively, a blow molding square bottle mold cavity is formed among the blow molding upper cavity, the blow molding threaded upper neck block, the core rod, the bottom mold body, the blow molding lower cavity and the blow molding threaded lower neck block, and the square bottle blank is reserved at the head of the core rod and extends into the blow molding square bottle mold cavity.

Description

Technical field [0001] The invention relates to a one-step injection blow molding mold and a molding process for a deep-bottomed PP square bottle, and belongs to the field of plastic hollow container processing equipment. Background technique [0002] A deep-bottomed PP square bottle, the bottom of the bottle is 12mm deep into the body (the conventional bottle is 5mm deep), which results in a very long distance to the four corners of the bottle bottom, and the wall thickness of the four corners of the product bottle bottom must be more than 0.5mm . The distance between the bottle mouth and the bottle shoulder is very short, which makes the four corners of the bottle shoulder have a relatively large range of blow molding, that is, to ensure that the wall thickness of the four corners of the bottle shoulder is uniform without affecting the size of the bottle mouth, which greatly increases the blow molding of the preform The difficulty. And in the production process, the surface o...

AI Technical Summary

Problems solved by technology

And the distance between the bottle mouth and the bottle shoulder is very short, so that the four corners of the bottle shoulder need to be blow-molded in a relatively large range, that is, to ensure that the wall thickness of the four corners of the bottle shoulder is uniform without affecting the size of the bottle mouth, which greatly increases the blow molding of the preform. difficulty

And in the production process, the surface of the bottle body needs to ensure a certain degree of flatness, coupled with the deep depth of the bottom of the bottle, it is easy to cause uneven wall thickness, which makes it difficult to shape the bottle body

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