Extruder with adjustable product bulk density

Abstract

The invention relates to an extruder with adjustable product bulk density. The body of the extruder is arranged with wear-resistant bushing on an inner wall of an extrusion chamber; a screw rotor is arranged in an inner cavity of the wear-resistant bushing; an outlet end of the extruder body is connected with a discharging apparatus; a last-stage extrusion chamber is arranged at an input section of the discharging apparatus; a venturi throat is arranged, close to an output, in an inner cavity of the discharging apparatus; a discharging mould is mounted at the outlet end of the discharging apparatus; a plurality of mould holes are distributed on the discharging mould; an upper pressure-adjusting plate and a lower pressure-adjusting plate are inserted at the venturi throat; an upper adjusting hole with a downward opening is arranged at the lower-end center of the upper pressure-adjusting plate; a lower adjusting hole with an upward opening is arranged at the upper-end center of the lowerpressure-adjusting plate; and an adjustment hole formed by encirclement of the upper adjusting hole and the lower adjusting hole is coaxial with the venturi throat. The top of the wear-resistant bushing is connected with a pressure-relief guide sleeve which extends upwards; a pressure adjusting plug is mounted in an inner cavity of the pressure-relief guide sleeve; and a guide sleeve pressure relief groove is arranged on an inner wall of the pressure-relief guide sleeve. The extruder is capable of very conveniently adjusting pressure of the extrusion chamber, thereby adjusting product bulk density.

Description

technical field [0001] The invention relates to an extruder, in particular to an extruder with adjustable product density, and belongs to the technical field of extruder equipment. Background technique [0002] The extruder is widely used in the fields of food processing and feed processing, including the main body of the extruder. The main body of the extruder is equipped with a feeding chamber and an extrusion chamber. The feeding chamber is connected to one end of the extrusion chamber. The feed inlet, the feed chamber and the extrusion chamber are provided with end-to-end screw rotors. The screw rotors are fixed on the main shaft of the extruder in sequence. The outlet end of the extrusion chamber is connected with a discharge device. The inner cavity of the discharge device is provided with a Venturi throat coaxial with the main shaft of the extruder, and a discharge template is installed at the outlet end of the discharge device. A plurality of die holes are distribu...

AI Technical Summary

Problems solved by technology

In the prior art, the size of the Venturi throat of the discharge device is fixed, which cannot meet this requirement, and a discharge device needs to be processed for each aperture, which is very costly, and it is very troublesome to replace the discharge device. The material is printed out, and the disassembly and assembly workload is very large, which seriously affects the production efficiency and is time-consuming and laborious.

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