Multiscrew pressurizing extruder

Abstract

The invention discloses a multiscrew pressurizing extruder which comprises a pedestal and a feeding section, a delivery section and a discharging section successively arranged on the pedestal, wherein an extruding pressurizing plasticizing section is arranged between the feeding section and the discharging section, an output shaft of a variable-frequency speed-regulating main motor is in fixed connection with an input shaft of a speed reducer, an output shaft of the speed reducer directly drives the feeding section and the extruding pressurizing plasticizing section in fixed connection with the feeding section, and the discharging section is connected with the back end of the extruding pressurizing plasticizing section. According to the invention, plasticizing and pressurizing of a material are integrated together, and only a set of a driving device is employed; not only a good plasticizing effect is obtained, but also a sufficiently great extrusion force, low energy consumption and great output are realized, so the multiscrew pressurizing extruder has a high practical value.

Description

technical field [0001] The invention belongs to the technical field of plastic product processing equipment, and in particular relates to a multi-screw supercharged extruder. Background technique [0002] At present, all kinds of plastic products we use are processed by various plastic machinery and equipment, but one of the necessary equipment is its plasticizing device extruder. The existing equipment is divided into three types, single Screw extruder, twin-screw extruder, planetary extruder, etc. [0003] As for the first type of single-screw extruder, it is relatively simple in structure and is also an early-developed one. Its principle is to change the design of a single-screw extruder with equal distances and different depths or different distances and different depths. It is a screw barrel and electric heating tube (ring) device. The single screw is driven by the motor through the reduction box. The plastic raw material is fed quantitatively to the single screw groov...

AI Technical Summary

Problems solved by technology

But its disadvantage is that the extrusion force is small, and the plastic compound has many water bubbles. First of all, we have learned that the planetary extruder is fed to the feeding screw and then sent to the plasticizing section (three-piece set) for plastic extrusion. When entering the plasticizing section for high-speed grinding, rolling and shearing, the main screw and small screw are also rotating at high speed, and the material is rolled and extruded in the meshing gap between the screw and the screw barrel. The small screw floats and rotates between the materials, and does not rub against the surface of the main screw and the screw barrel at all, so the wear of the plasticizing section (three-piece set) is small, but the problem is that once the outlet is blocked, the material Immediately retreat from the screw engagement gap and the gap between the small screw and the small screw. At this time, the material at the discharge port cannot go out, and the plasticized material is still running at high speed at the discharge port. The friction makes the material immediately degrade and burn

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