Combined screw rod extrusion device

Abstract

The invention provides multi-screw extrusion forming equipment, comprising feeding equipment (20), a screw extruder (10), an extrusion mould (40), cutting equipment (30), a rotary motor box (50) and coating equipment in sequence, wherein a cavity of the multi-screw extruder (10) comprises three screws; an inner layer cavity is arranged in the cavity of the multi-screw extruder (10) and is integrally combined with an inside screw; in addition, the multi-screw extrusion forming equipment is provided with an outer layer cavity (7); the three screws form a three-screw structure and are arranged on an upper layer and a lower layer; and one screw on the lower layer is respectively closed and occluded with the two screws on the upper layer. By adopting the three-screw structure, the multi-screw extrusion forming equipment improves the extrusion efficiency and the utilization rate of space and can effectively increase the highest yield of single extrusion equipment under the condition of not enlarging the occupied area of the equipment.

Description

technical field [0001] The invention relates to a combined screw extruding device, specifically a device for processing pre-mixed rice noodle balls or dough by using a three-screw extruder and matching devices for extrusion, cutting and molding, and coating. It belongs to the technical field of food processing. Background technique [0002] With the increasing requirements for food nutrition, cereal products with various complex nutrients and their production methods are also developing rapidly. From the early acid pre-steaming process, direct soaking method and coating method, etc. Up to now, it is relatively complete: from grain crushing→pretreatment→mixing with nutrients→extrusion→cutting and forming→drying→screening→rice blending according to the proportion, and finally obtain the technological process of nutrient-enhanced compound grains. [0003] The extrusion-cutting step is an important link in the production process. Generally, a single-screw or twin-screw extruder...

AI Technical Summary

Problems solved by technology

[0007] 1. The screw of the traditional twin-screw extruder is directly placed in the cavity with an oval or circular cross-section. During the re-extrusion and conveying process, the material tends to accumulate in some parts, thereby reducing the extrusion effect

[0008] 2. And because there are often accumulations in the screw cavity, these accumulations that have not been fully squeezed for a long time will condense into blocks after a period of time, which will affect the overall product output efficiency and product uniformity, and need to be cleaned frequently

However, the screw replacement process of the traditional twin-screw extruder is difficult, and after the shutdown, the screws will still produce mechanical rotation due to the interlocking structure, which is likely to cause accidents

[0009] 3. The extrusion efficiency of the traditional single-screw or twin-screw extrusion structure can only be improved by increasing the size of the screw. However, the increase in the size of the screw will lead to a decline in the extrusion efficiency and extrusion quality of the entire equipment.

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