Molding method, mold for molding, molded product, and molding machine

Abstract

The object of the present invention is to be able to mold a molded article having a three-dimensional shape and a thin sidewall deep-bottomed concave container in a short period of time even if a molding material having poor moldability such as a low-environment burden material is used. Wherein, the filling of the molding material into the cavity of the above-mentioned mold device is started before the completion of the mold closing process of the mold device, and the filling of a predetermined amount of the above-mentioned molding material is completed before the completion of the above-mentioned mold closing process, and the above-mentioned is carried out after the completion of the above-mentioned mold closing process. The mold clamping process of the mold unit molds molded products made of low environmental burden materials.

Description

technical field [0001] The present invention relates to a molding method, a molding die, a molded product, and a molding machine. Background technique [0002] Conventionally, in a resin molding machine such as an injection molding machine, resin heated and melted in a heating cylinder is injected at high pressure to fill the cavity of a mold device, and the resin is cooled and solidified in the cavity to form a molded product. Taste. Therefore, the above-mentioned mold device is composed of a fixed mold and a movable mold, and the above-mentioned movable mold is advanced and retreated by the clamping device, approaching or leaving the above-mentioned fixed mold, so that the mold can be opened and closed, that is, mold closing, mold clamping and mold opening ( See, for example, Japanese Patent Application Laid-Open No. 6-293043). [0003] Here, the term "mold closing" refers to a state in which the parting surfaces of the mold are in contact with each other from an open st...

AI Technical Summary

Problems solved by technology

However, since the fluidity of low-environmental burden materials is lower than that of molding materials such as resins used in the above-mentioned conventional injection compression molding methods, molding is difficult.

For example, in the case of a deep-bottomed container such as a cup whose height dimension is larger than the diameter dimension of the opening, if the thickness of the side wall is thinned, the flow path of the molding material in the cavity will be narrowed, so the injected Molding material cannot spread throughout the cavity, resulting in defective products

In particular, in the case of molding materials with poor moldability, since the molding material does not pass through the portion of the cavity corresponding to the thinned side walls even with the above-mentioned conventional injection compression molding method, it is impossible to mold deep bottoms. container

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