Preconditioner is completely made by stainless steel, including the shell, mixing shaft and transmission supporting device.
The main feature is it mixes the materials crosswise by two mixing shafts in different diameter and rotation speed. It has good mixing effect, making materials fully mix with steam, water or other liquids. The large volume shell makes the materials stay for longer time in the preconditioner, which has enough time for precuring of materials under certain temperature and certain moisture content.
Advantages of preconditioner:
1. Improvement of productivity
Because it has used the steam to partly cook of the materials, the needed mechanical energy used by materials rising to the highest temperature becomes less. To the equipment with given power, the productivity is much higher than the dry extruder with same power.
2. Larger shaping capacity
The use of water and steam improves the moisture content of the materials, which increases the mouldability performance and final quality of the products.
3. Less abrasion of the extrusion parts
Because the cooked materials have relative moisture and cultivability, it does not need higher pressure and friction in the cavity. And also the moisture has the lubrication effect, which lowers the abrasion in large scale and increases the lifespan of cavity and screws.
4. Improvement of gelatinization of the products
Steam and cooking improves the gelatinization of the products, making it taste better and easier for digest.