High-viscosity molding composite material single-screw extruder

Abstract

The invention relates to a high-viscosity molding composite material single-screw extruder. The high-viscosity molding composite material single-screw extruder consists of a motor, a reduction box, acharging hopper, a machine barrel, a screw and a machine head, wherein the screw is composed of a screw mandrel, two single-head thread modules, one double-head thread module and a melt breaking module; an involute spline combination is adopted between the screw mandrel and the modules; a temperature control medium hole is formed in the axial direction of the screw mandrel and used for controllingthe temperature of extruded materials; the screw module is mainly used for heat preservation, compaction and transportation of a melt; the melt breaking module is mainly used for breaking and shunting the melt material; the outer diameter of the screw is 30-300 mm, the length-diameter ratio is 1-10, the maximum compression ratio is 4, the maximum rotation speed of the screw is 200 rpm, and the power of a variable-frequency stepless speed regulation main motor is 10-500 kw; a machine barrel adopts a longitudinal slicing structure design; and the temperature of the machine barrel is controlledto range from room temperature to 400 DEG C. According to the high-viscosity molding composite material single-screw extruder, the molded composite material with high viscosity, reaction tackifying and reaction curing is stably extruded and pelletized, and the production is environmentally friendly.

Description

Technical field [0001] The invention belongs to the field of resin crushing devices, and specifically relates to a single-screw extruder for high-viscosity molded composite materials. Background technique [0002] Molded composite materials refer to phenolic resin, epoxy resin, bismaleimide resin, polyimide resin, polyether ether ketone resin, polycarbonate resin and other thermosetting resins and thermoplastic resins as the matrix, with chopped Fibers, nano-particle fillers and additives are composite materials with added components; the high viscosity means that the melt viscosity of this type of composite material is very high. When using GB-T3682-2000 thermoplastic melt mass flow rate and melt volume flow When testing the melt flow behavior of the above-mentioned high-viscosity molded composite material, the mass flow rate of the melt in the melting temperature range is 0g / min~15g / 10min but not including 0g / min, or its melt volume Flow rate is 0cm 3 / min~20cm 3 / 10min but no...

AI Technical Summary

Problems solved by technology

This final process still needs to be pulverized to produce molding compounds with uneven size, irregular shape and containing powder, which represents the current industrial level of molding compounds. health is seriously threatened

[0006] Secondly, the screw of the traditional single-screw extruder is composed of the feeding section, which is the compacting section, the compression section, which is the plasticizing section, and the homogenization section, which is the metering section. And unchanged, the main function is to transport raw materials to the subsequent section; the root diameter of the screw flight in the homogenization section is larger, the screw groove is shallower and unchanged, and the main function is to squeeze the melted material in the compression section to the front end of the screw at a quantitative and constant temperature and the outlet of the machine head; the root diameter of the screw flight in the compression section changes, and the depth of the screw groove changes from deep to shallow. The main function is to compact and melt the material and build up pressure. The ratio of length to diameter is 12:1 to 42:1. The heating time and residence time of the material in the barrel are long, and the screw of the traditional single-screw extruder is generally an integral structure, which cannot meet the high viscosity. Requirements for extrusion molding and granulation of high-viscosity molding compounds that are high, or prone to reaction to thicken, or to reaction and curing

[0007] Therefore, it is of great significance to invent a high-viscosity molding compound single-screw extruder, and the technology and its solution involved in the present invention are still little known

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