How to judge the good and bad of the extruder

Puffed food has developed rapidly in recent years and has become a separate food category. As the main processing means of puffed food, there are many kinds of extruder. The extrusion technology in China is still backward compared with that in other countries. The production capacity, technology and operation of the equipment are poor. Extrusion machine in the process of design and production, due to the change of unknown factors greatly depends on the experience data and formula, the combination of considering convenient processing, assembly of factors make different manufacturer production of extrusion press its industrial parameters and quality has very big difference, in the same factory production of extrusion machine its process parameters may be different, too. Evaluation of extrusion machine for fresh from the following points to consider 1, long has high production capacity, unit energy consumption. 2. Strong adaptability to raw materials. 3, a more complete control system, can accurately coordinate the control of the extruder each action, so that the extruder temperature, pressure, screw speed and output and other parameters strictly controlled in the range of technological conditions stipulated, to obtain the required product quality. 4. With a long service life of the equipment, one of the biggest problems of extrusion is the abrasion resistance of the screw and sleeve under the condition of long time and high temperature. 5, the machine must have enough strength and stiffness, reasonable and compact structure, good operating performance and maintenance performance and low maintenance cost. 6. Processing accuracy of parts, electrical parts, quality of purchased parts, etc. 7. Appearance noise, vibration and volume of the equipment. 8. Inspect whether the equipment manufacturer has the production conditions, the appraisal certificate of equipment production, enterprise standards and other relevant materials. In addition, extruder room is a kind of processing equipment with strong adaptability. But for a certain geometric structure of the screw, the material can be processed is limited. When the variety of materials, components and product quality determined, the best extruder only one, so, extruder is limited to the scope of adaptation, to design a universal extruder room is very difficult. Extruder is the most important equipment in the production line and can operate independently. However, the process effect is directly affected by the process effect of the auxiliary processing equipment before and after the treatment, and even when the treatment is not appropriate, the extruder often cannot operate normally, so a reasonable equipment selection, not only lies in the normal selection of the host, the matching of the auxiliary equipment on the production line and the determination of the process parameters can not be ignored.