company news about What is a single-screw extrusion puffing machine

The screw of the single-screw extruder consists of a shaft that connects the screw units of various structures. The entire screw consists of three sections: feeding section, kneading section and melt homogenization section. After the material enters the barrel from the feed port, it undergoes the process of solid transport, melting and homogenization in the screw, which transforms the material from a loose state into a continuous plastic dough.

In the single-screw extrusion cavity in the material basically closely around the screw, is a spiral continuous belt, the screw rotation of the material along the spiral like a nut to move forward, but when the friction between the material and the screw is greater than the friction between the material and the barrel, the material will have a common rotation with the screw, which can not achieve the forward extrusion of the material and conveying role. When the moisture and oil of the material is higher, this trend is more obvious. To avoid these problems, most of the single-screw extrusion puffing machine now uses segmentation, single, double screw, pressure ring and pinch ring staggered combination of screw and inner wall slotted barrel to adapt to the changing conditions of the material in the cavity.

Single-screw extrusion puffing machine structure is relatively simple, the price is relatively low, its early development, relatively mature technology, stable equipment, in the production of puffed aquatic feed as the main equipment has a history of more than 40 years, widely used in tilapia, catfish, grass carp, carp and other low-protein adult fish feed production. In addition, in the pond mix fish feed and other low-grade feed production, single-screw extrusion puffing machine has obvious advantages, its raw materials do not need to go through the superfine powder, greatly reducing the investment costs of equipment to improve production efficiency.