Mixing control method for pre-plasticizing of plastic powder

Abstract

The invention provides a mixing control method for pre-plasticizing of plastic powder. The mixing control method for pre-plasticizing of the plastic powder comprises the following steps that S1, the mixed plastic powder is heated by a high-speed mixer; S2, the difference value between the actual temperature rise ramp dx and the temperature rise ramp threshold value D' before the mixed plastic powder enters the pre-plasticizing temperature interval is monitored, and the step S3 is entered when the difference value meets a preset value; S3, the high-speed mixer continuously heats the mixed plastic powder to the pre-plasticizing temperature interval and sets the duration time for maintaining the pre-plasticizing temperature interval, the actual pre-plasticizing temperature rise ramp di of themixed plastic powder is monitored, and the running frequency f' of a shearing cutter head of the high-speed mixer is regulated, so that the actual plasticizing temperature rise ramp di in the pre-plasticizing temperature interval is the same as the temperature rise ramp allowable value d; and S4, the pre-plasticized mixed plastic powder is fed into a cold mixing cylinder for rapid cooling. According to the mixing control method, heat exchange inside the mixed plastic powder is fully guaranteed, so that the mixed plastic powder is fully pre-plasticized, and the performance of plastic productsis improved.

Description

technical field [0001] The invention relates to the technical field of powder pre-plasticization, and more particularly, to a mixing control method for plastic powder pre-plasticization. Background technique [0002] The existing plastic powder mixing equipment does not pay much attention to the pre-plasticization process of the mixed plastic powder. As long as the mixing time is sufficient, the mixed plastic powder is qualified. If the material and equipment are unstable, the mixed plastic powder If the temperature of the material is too low or the pre-plasticization time is not sufficient, the mixed plastic powder cannot be pre-plasticized well. Layers, etc., seriously affect the performance of plastic products. If the temperature rise of the mixed material is too fast, the resulting excessive consumption or denaturation of the stabilizer will also seriously affect the extrusion or injection molding quality of the product. Contents of the invention [0003] The purpose...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing plastic powder pre-plasticization process without temperature rise control, which affects the performance of plastic products, and to provide a mixing control method for plastic powder pre-plasticization

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