Combined impeller abrasive disk type extrusion plasticizing method and device

Abstract

The invention discloses a combined impeller abrasive disk type extrusion plasticizing method and a combined impeller abrasive disk type extrusion plasticizing device. A fixed abrasive disk and a rotating abrasive disk are arranged in a charging barrel; the fixed abrasive disk is arranged on the charging barrel; and the rotating abrasive disk is arranged on a power shaft. The invention is characterized in that: the fixed abrasive disk and the rotating abrasive disk are designed to be impeller type abrasive disks are formed by making a plurality of material through grooves for allowing materials to pass through and mixing the materials on whole abrasive disks along a radial direction; impeller blades form abrasive surfaces, and channels are formed by the material through grooves between theblades of the impeller abrasive disks; a plurality of like fixed impeller abrasive disks and rotating impeller abrasive disks are overlapped alternately; the materials are forcefully pressed in from the front part of the inside of the charging barrel; then under the rotation of the rotating impeller abrasive disks relative to the fixed impeller abrasive disks, the materials pass through abrasive disk gap and blade material through grooves so as to be gradually mixed, crushed, ground, softened, subjected to heat exchange and plasticized in the constantly varying material through channels and the abrasive disk gaps; and finally, the materials are discharged from a discharge hole on the rear part of the inside of the charging barrel.

Description

technical field [0001] The invention relates to an extruding and plasticizing method and device of a combined impeller grinding disc. Specifically, one or more groups of impeller grinding discs are used to realize plasticization of plastics and rubber, and materials are mixed, melted and plasticized by combined impeller grinding discs, which belongs to the field of plastic and rubber processing equipment. Background technique [0002] The plasticizing methods commonly used in the plastic and rubber processing industry include two-roll open milling, two-roller internal mixing, and screw plasticizing. For example, two-roll mill, two-roll internal mixer, plastic single-screw extruder, plastic twin-screw extruder, plastic injection machine, rubber extruder. The principle of the two-roll mill is to repeatedly squeeze and grind the material through the gap formed by two rotating rollers close to each other. The main advantage is that the plasticizing effect is good, and the main ...

AI Technical Summary

Problems solved by technology

The disadvantage is that after changing to a tooth shape that is convenient for material flow, the effect of abrasives is reduced

[0010] Chinese patent 200620061842 is to introduce the electromagnetic field and the mechanical pulsating force field generated by the vibrator into the flight of the inner screw and the outer screw, and the grinding disc and the end face of the outer screw to grind the edges. The material is fed from the outer screw and reaches the front grinding disc after closing the feed port. , and then enter the inner screw and return from the outlet of the outer screw tail to realize the circular conveying and shear extrusion of the polymer and filler, thereby improving the mixing effect of the material and the efficiency of the chemical reaction. It is characterized by electromagnetic field and excitation The device and internal circulation are used to enhance the effect of the grinding disc, and there is no improvement in the flow resistance of the grinding disc

[0012] All the above-mentioned improvements have not changed the essence of the plasticization of the grinding disc, that is, a whole grinding disc is still used, and the material flows in from the grinding disc gap of the outer ring of the grinding disc or vice versa, and flows out from the gap of the inner ring of the grinding disc or vice versa. The annular area of ​​the two integral grinding discs The gap between them constitutes the grinding and plasticizing gap, the grinding and plasticizing gap is the only passage for the material, and it is also the abrasive plasticizing area, so this area undertakes multiple functions, and the adjustment of its various functional parameters often restricts and contradicts each other, such as , increasing the diameter of the grinding disc can increase the grinding and plasticizing area of ​​the grinding disc, increase the residence time of materials in the grinding and plasticizing gap, and improve the plasticizing quality, and reducing the grinding and plasticizing gap can also improve the plasticizing effect and mixing strength, but these measures will increase The material flow resistance will reduce the output; it will increase the gap pressure and cause the deformation of the grinding disc and the axial bearing load of the grinding disc; it will increase the power consumption

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