Ultrasonic auxiliary micro injection forming die

Abstract

The present invention discloses an ultrasonic auxiliary micro injection forming die. The die comprises a fixed die and a moving die, wherein the fixed die comprises a fixed die fixed plate, and a fixed die template is connected with the fixed die fixed plate. The moving die comprises a moving die template which is connected with a moving die insert in the middle, a moving die fixed plate is fixedly connected with the moving die template arranged above through a baffle plate. A push plate supporting device is arranged in the middle of the moving die fixed plate, and a support is fixedly arranged between the push plate and the moving die template through a pillar support. A spring is arranged between the push plate and the moving die template, and an energy transducer is connected with an ultrasonic generator. Every set of piezoelectric ceramics is connected, in a manner of being compressed, with the bottom surface of the support through double ended screws, the top end of every double ended screw is in threaded connection with the lower part of a horn, and the top part of every horn is connected with a moving die core. By adopting the device, not only the fluidity and filling performance of polymer melt can be improved, but the physical property of micro injection molded parts can also be enhanced.

Description

technical field [0001] The invention relates to injection molding and micro-injection molding processing of polymer material devices, in particular to polymer ultrasonic-assisted micro-injection molding molds. Background technique [0002] With the wide application of polymer materials in the manufacture of microstructures, the manufacturing technology of polymer microstructures has become a key issue in the manufacture of polymer microelectromechanical systems (MEMS) and microsystems (MST). At present, micro-injection molding technology is considered to be the most important manufacturing method for polymer microstructure, which has the characteristics of simple manufacturing process, low manufacturing cost, and easy mass production. [0003] However, the current micro-injection molding technology is still mostly in accordance with the traditional conventional injection molding technology mode, to increase the shear stress of the polymer melt by increasing the injection spe...

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Problems solved by technology

As polymer MEMS and MST require smaller and smaller micro-featured structures of polymer devices, the existing micro-injection molding technology has the following problems: (1) due to the unevenness of heat loss and Uncertainty causes the shape accuracy of micro-devices to fail to meet higher-level requirements stably; (2) For polymers with high viscosity, it is not easy to fill the mold cavity during injection molding of microstructures with high aspect ratios; (3) ) Compared with conventional injection molding, micro-injection molding requires higher material melting temperature and mold temperature, which brings difficulties to the design and manufacture of micro-injection molding systems; (4) The design and manufacture of micro-mold cores cannot Meet the needs of the development of microstructure production; (5) For polymers that are easy to decompose, the processing temperature range is very narrow, and the processing conditions are difficult to control; (6) The high aspect ratio microstructure is easily damaged, and the polymer adheres to the micromold Larger, there is currently no effective means of demoulding

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