Most of the common extruders on the market now are twin-screw extruders. This is because twin-screw extruders have a wide range of applications and are very flexible in configuration. They are a mechanical equipment that mainly uses grain flour as raw materials to produce puffed food. Its principle is Through the bite and extrusion of the screw, the heat energy generated during rotation is used to accumulate and mature the food and cut it into various shapes.

The advent of puffed food machinery can reduce labor, and the output can be greatly increased. The taste is also rich and colorful, meeting the needs of people at all stages. The shapes are also diverse, including round, ball, round bar, square , semi-circular, long strip, etc., and now our equipment can be customized on demand. The snacks are softer after puffing, and the vacuum small packaging can be filled with only a few pieces, which greatly reduces the cost and can also be fully automated. , automatic feeding, automatic oil injection, automatic seasoning, etc.

It is wrong to think that adding water during the puffing process means wet puffing, and not adding water means dry puffing. The wet puffing machine is based on the dry puffing machine and adds a conditioner. Its purpose is to increase the temperature of the material, soften and pre-cook the material, and add a certain amount of moisture.

Wet puffing is more efficient than dry puffing and the consumable parts of the spiral and puffing chamber have a longer service life. The reason is: if the material puffing temperature is 130°C, dry puffing requires a temperature rise of 110°C from room temperature (20°C) to 130°C. 

If wet production is used, the temperature after conditioning is 80°C, and only the material temperature needs to be increased by 50°C. Therefore, wet puffing requires less mechanical energy than dry puffing, and more energy can be used to increase output; due to the material It softens, reduces the wear of wearing parts such as spirals and expansion chambers, and improves their service life.