Multiple-screw extrusion forming apparatus

Abstract

The invention provides a multiple-screw extrusion forming apparatus. The extrusion forming apparatus sequentially comprises a feeding apparatus (20), a screw extruder (10), an extrusion die (40), a turning motor box (50), a coating apparatus and a conveying apparatus (70), wherein the conveying apparatus (70) is arranged below a basic disc and comprises a driving roller and a conveying belt (72) with adhesion; the inner cavity of the screw extruder (10) comprises four screws and is provided with an inner layer of cavity which is integrated with an inner screw; and furthermore, an outer layer of cavity (7) is also arranged, the four screws form a four-screw structure and are arranged into upper and lower layers, and every two adjacent screws are sealed and articulated with each other. By adopting the four-screw structure, the multiple-screw extrusion forming apparatus improves extrusion efficiency and utilization ratio of space, and can effectively increase the maximum yield of a single extrusion apparatus without enlarging occupied areas of apparatuses.

Description

technical field [0001] The present invention relates to a kind of multi-screw extruding equipment, in particular, it adopts four-screw extruder and matched extrusion, coating, conveying and other devices to process pre-mixed rice noodles or dough, and belongs to The field of food processing technology. 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 is used ...

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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