Ultrasonic plasticizing micro-injection molding machine main body and molding method

Abstract

The invention discloses an ultrasonic plasticizing micro-injection molding machine main body and a molding method. The main body comprises a quantitative feeding module, an ultrasonic plasticizing module, a metering module, an injection module and a mold clamping unit, wherein the quantitative feeding module comprises a translation mechanism, a rotating mechanism, a feeding pressurizing assembly and a charging barrel assembly; one end of the feeding pressurizing assembly extends into the charging barrel assembly; the other end of the feeding pressurizing assembly is connected with the rotatingmechanism; the rotating mechanism is connected to the translation mechanism; an inlet of the ultrasonic plasticizing module communicates with the quantitative feeding module; an outlet of the ultrasonic plasticizing module communicates with the metering module; the metering module comprises a metering chamber, a metering plunger, a displacement sensor, a pressure sensor and a driving mechanism; one end of the metering chamber communicates with the mold clamping unit; a through hole is formed in the axial center of the metering plunger; the metering plunger is arranged at the other end of themetering chamber and is connected with the driving mechanism; the metering chamber communicates with a runner; the injection module comprises an injection plunger and a driving assembly; one end of the injection plunger penetrates through the metering plunger to extend into the metering chamber; and the other end of the injection plunger is connected with the driving assembly.

Description

technical field [0001] The invention belongs to the field of advanced molding and manufacturing, and in particular relates to a main body of an ultrasonic plasticizing micro-injection molding machine and a molding method. Background technique [0002] At present, micro-nano parts have been widely used in many fields such as aerospace, military, and automobile industries. Micro-injection molding technology is a typical representative of micro-nano manufacturing technology. Micro-molding technology, polymer micro-injection molding has the advantages of low cost, batch production, and high precision. [0003] However, the traditional micro-injection molding technology has problems such as long plasticizing time, excessive plasticizing amount at one time, serious mismatch between injection volume and micro-part volume, etc., resulting in poor stability of molding quality and serious waste of raw materials. Ultrasonic plasticizing technology can improve the flow properties of po...

AI Technical Summary

Problems solved by technology

[0005] 1. In terms of feeding: particles splash out during the polymer filling process, there is no rough metering step before plasticization, and the plasticization amount is not well estimated; the tool head has both plasticization and melt transportation, and the method is simple Failure to consider the wear and tear of parts and the subsequent maintenance and replacement of key components

[0006] 2. In terms of ultrasonic plasticization: the plasticizing cavity is connected to the mold core cavity, and there is no specific valve to block it, and only the injection molding method can be used while plasticizing; under the action of the plunger, the residual polymer particles that are not completely plasticized It is filled into the core cavity of the mold together with the fully plasticized polymer melt, which can easily lead to poor molding quality

[0007] 3. Injection: Although rapid plasticization has been achieved with the advantage of ultrasonic plasticization, the precise measurement of the polymer melt after plasticization has not been considered, resulting in the molded parts obtained after injection filling the mold core cavity, waste materials accounted for than still big

Images