Mould for plastic container

Abstract

The invention relates to a mould of a plastic container. The ratio value of the depth of the plastic container to the diameter of the bottom of the container is more than 1.5. The mould comprises a movable mould with a mould cavity and a fixed mould with a mould core, wherein the mould core is in a convex shape corresponding to the inner surface of the plastic container; the mould cavity is in a concave shape corresponding to the outer surface of the plastic container; a molding cavity of the plastic container is formed by combining the mould cavity and the mould core; the fixed mould is provided with a vertical injection molding pipeline which extends to the lower surface from the upper surface of the fixed mould; and the movable mould is provided with a magnetic induction heating coil along the periphery of the mould cavity. According to the mould of the plastic container disclosed by the invention, the direct injection molding of the plastic container with a high length-diameter ratio can be realized; and the performance of injection molding and de-molding of the plastic container can be effectively improved, the time required for de-molding is shortened and the injection molding production efficiency is improved; and the surface quality of the plastic container is improved.

Description

technical field [0001] The invention relates to the technical field of moulds, and more specifically, the invention relates to a mold for plastic containers. Background technique [0002] Plastic containers are usually manufactured using injection molds and injection molding processes, but for plastic containers with a certain depth, it will not only cause difficulty in demoulding or poor surface quality due to uneven temperature distribution in the depth direction of injection-molded plastic containers. In the prior art, compressed air is used for demoulding. Usually, a valve cavity is set in the middle of the core. After the injection molding is completed and the movable mold and the fixed mold are separated, compressed air is injected into the joint between the top of the core and the product, and the air pressure is used to release the mold. The product pops up. However, in the actual injection molding production practice, it is unreliable to rely solely on compre...

AI Technical Summary

Problems solved by technology

However, in the actual injection molding production practice, it is unreliable to rely solely on compressed air for demoulding, especially for plastic containers with deep inner cavities, it is often difficult to successfully complete the demoulding action; The cavity injects compressed air directly into the joint between the top of the core and the product. The compressed air directly impacts a certain part of the plastic product just out of the mold, which is easy to deform or damage the plastic product.

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