Injection mold with ultrasonic waves directly acting on polymer melt

Abstract

The invention discloses an injection mold with ultrasonic waves directly acting on a polymer melt, and belongs to the field of injection molding. An ultrasonic vibrator is arranged at the tail end of a main runner and on the moving side of a mold, and is connected with a moving mold plate or a moving mold cushion plate through screws by virtue of a flange plate at a nodal surface, and an amplitude variation rod is in clearance fit with the moving mold plate. The flange plate of the ultrasonic vibrator and the amplitude variation rod are made of a piece of titanium alloy material, and the outer circles of the flange plate of the ultrasonic vibrator and the amplitude variation rod are concentric. The flange plate of the ultrasonic vibrator is positioned by virtue of a counter bored hole in the mold plate, so that the ultrasonic vibrator and the amplitude variation rod are accurately centered. The frequency of the applied ultrasonic waves is 15-30 kHz, the power is 100-500 W, the ultrasonic waves act in the stages of injection and pressure maintaining, and the general working time is 2s-20s. The ultrasonic amplitude variation rod directly faces the main runner, so that the ultrasonic waves act on the melt for enough time, the transfer efficiency of the ultrasonic waves is improved, energy loss is avoided, and a new platform is provided for researching the influence of ultrasonic waves on the molding quality of an injection molding product.

Description

technical field [0001] The invention belongs to the technical field of injection molding, and relates to a mold for studying the influence of ultrasonic waves on the molding quality of injection molding products. Background technique [0002] With the advancement of science and technology, the demand for plastic products with complex and fine structural characteristics is increasing. As the most important plastic product forming technology, injection molding is developing in the direction of precision and miniaturization. At the same time, the molding quality is also important. put forward higher requirements. [0003] In order to improve the molding quality of injection molding products, in addition to taking measures to improve the level of mold design and manufacturing and using high-quality precision injection machines, it has become a research hotspot in recent years to assist injection molding with the help of external field effects, and ultrasonic excitation is one of...

AI Technical Summary

Problems solved by technology

For the former, the existence of the mass additional effect will have a certain impact on the ultrasonic operating frequency. The reflection and refraction of the ultrasonic wave between the heterogeneous interfaces will reduce the energy transfer efficiency, and if it is not handled properly, it will form a "false auxiliary" situation; Ultrasonic transmission efficiency is high and energy loss is small, but improper location selection will affect product appearance quality

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