In 1856, when the American Ward applied for the first patent on puffing, he must not have thought that a century later puffing technology will be applied to so many areas: plastics, feed, food, chemicals, pharmaceuticals, oil and grease processing, etc.; he would not have thought that extrusion puffing machine from the development of a single screw to the twin-screw, and the twin-screw extruder will be a non-meshing with the direction of rotation, non-mesh relative rotation, mesh with the rotation, and so many forms of relative rotation. and relative rotation, so many forms of engagement. More and more people recognize the magic of extrusion, more and more food ingredients due to extrusion and soaring in value. 

      Puffed food is one of them. Puffed food with its taste fresh and crispy, easy to carry and eat, raw materials for a wide range of flavors and other characteristics, increasingly becoming a favorite food, with the continuous improvement of people's standard of living, it has become an important part of the food industry, and the market potential is huge. Puffed food market demand has also led to the development of machinery and equipment. 

      Classification of puffed machine 

      Due to the different uses and equipment, puffed food has the following three types: First, with extruded puffing machine, corn and potatoes as raw materials for the production of small foods; Second, with extruded puffing machine, plant protein as raw material for the production of tissue-like protein food (plant meat); Third, grains, legumes or potatoes as raw materials, made of staple foods after puffing. In addition to the trial production of indirect heating puffing machine, but also with refined grain puffed powder trial made of a variety of puffed food. 

      The current situation of puffed machine 

      Twenty years, the domestic screw extrusion puffer are some of the domestic company's single-screw extrusion puffer as a representative of the performance of a single, processing capacity is not high, but by virtue of its low price, but also in the United States to the United States Wenger, Switzerland, Buhler, France, Clextra and other internationally renowned enterprises produced by the twin-screw extrusion puffing machine dominated the domestic market to settle down and stand still. After all, industry insiders know that the twin-screw extruder in the quality control and processing flexibility has irreplaceable advantages; they know better, twin-screw extruder in the screw material, pitch, helix angle, root diameter, torque and blade section determination, as well as tightly integrated building block type segmented spiral processing precision has extremely demanding requirements.