High-pressure injection molding process and high-pressure injection molding device finishing same

Abstract

The invention discloses a high-pressure injection molding process which comprises the following steps of: a, providing at least one bottle embryo to a closing device; b, providing a first mold and a second mold corresponding to each other of the closing device, and performing relative pressing to form a mold cavity in the first mold and the second mold so as to contain the bottle embryo in the mold cavity; c, providing a high-pressure gas to perform blow molding of the bottle embryo so that the bottle embryo forms a container; d, providing a movable module below the mold cavity to push against the container toward the inside of the mold cavity so that the bottom end of the container is extruded by the movable mold to generate at least one acute-angle surface; and e, enabling the closing device to perform mold withdrawing operation so as to take out the container.

Description

technical field [0001] The present invention is a high-pressure injection molding method and device, more specifically, a high-pressure injection molding process that can be applied to plastic container materials and a high-pressure injection molding device that completes the process. The container forms distinct threads and develops an acute angle at the bottom. Background technique [0002] Press, most of the containers used in cosmetics on the market, such as painted nail polish, mascara, and liquid eyeliner, are made of plastic materials, and for the convenience and practicality of use, many containers will be added at the bottom. a base so that the container can stand firmly on the table; however, due to the conventional container injection molding process, especially the PET container blowing process, has its own technical limitations, so the bottom of the container after molding It has a rounded corner, and it is not easy to blow mold a thread section. Even if it can...

AI Technical Summary

Problems solved by technology

[0002] Press, most of the containers used in cosmetics on the market, such as painted nail polish, mascara, and liquid eyeliner, are made of plastic materials, and for the convenience and practicality of use, many containers will be added at the bottom. a base so that the container can stand firmly on the table; however, due to the conventional container injection molding process, especially the PET container blowing process, has its own technical limitations, so the bottom of the container after molding It has a rounded corner, and it is not easy to blow mold a thread section. Even if it can be blow molded, the shape of the thread is quite uneven, and the depth is not enough, so that the thread section is quite inconspicuous. Therefore, when the container is screwed to the base After that, it is easy to cause the container and the base to fall off each other due to the application of force or external force collision, resulting in loss; and when the user places it in the cosmetic bag that is carried with him, it is also easy to cause the container to fall off frequently and cause searching. And the trouble of re-locking, moreover, after a long period of multiple locking, the thread section will gradually be ground, making it impossible to lock on the base at all

[0003] In view of this, many containers combine the base in a clamping manner by providing a tenon structure on both sides of the bottom end, so as to replace the above-mentioned screw lock method. However, although the degree of coupling can be slightly increased in comparison, it is still It will fall off due to a little force or collision; based on the above, only by overcoming the shortcomings of the arc angle and the unobvious thread in the manufacturing process can the above-mentioned problem of the combination between the container and the base be solved

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