The Function And Use Of Twin Screw Barrel Extruder
The function and use of Twin Screw Barrel extruder
The auxiliary equipment of the twin-screw extruder mainly includes a feeder device, a straightening device, a preheating device, a cooling device, a traction device, a meter, a spark testing machine and a take-up device. The use of the extrusion unit is different from its optional auxiliary equipment is not the same, as there are cutters, blowers, printing devices. Split-type parallel twin-screw extruder is a significant feature: the barrel can be split at the same time, the screw and barrel liner can be arbitrarily combined.
Chemical building materials is the focus of the national industrial policy to support the new building materials, the state in 1994 set up a chemical building materials coordination leading group, and developed the industry development plan in 2000, to promote China's chemical building materials industry healthy and orderly development has played a huge push effect. Twin-screw extruders require rigorous processing of temperature and shear-sensitive materials.
Twin Screw Barrel extruder is a kind of meshing type extrusion equipment, with its excellent processing performance has been more and more widely used, and become the main trend of market development. The drive system is a key component of a twin-screw extruder that requires a large torque output and a greater axial force. However, due to the two screw center distance limit, the transmission system gear, output shaft and bearing design are put forward a very high demand.
The level of foreign sixth-generation twin-screw extruder is to catch up with the target, around the twin-screw extruder high production efficiency, strong mixing plasticizing ability, good operating stability, low energy consumption and multi-function The use of six major technical performance indicators, the successful development of the first domestic φ30 efficient multi-functional twin-screw extrusion granulation unit.With the co-rotating twin-screw extruder mechanism of the deviating from the in-depth study.Through the analysis of materials The effects of the physical properties, the volatile content, the extrusion process conditions, the geometrical parameters of the screw elements and the combination form on the volatilization efficiency of the volatiles were studied in the process of forming and discharging the low molecular volatile gas during the extrusion process. The formation of conditions and accelerate the various factors of bubble burst.
The present situation and development of the feeding system of the parallel twin-screw extruder.Through the analysis and research on the function and structure characteristics of the feeding system of the parallel twin-screw extruder, on the basis of summing up various types of feeders at home and abroad , To explore the solution to solve the problem of hopper bridge, to find ways to improve the adaptability of feed screw on the material, and to design a new feeding system, a better solution to the problem of material bridge.
Maintenance of Twin Screw Barrel extruder:
First, the use of 500 hours after the gear box will be grinding down the iron or other impurities in the gear, so the gear should be cleaned at the same time to replace the gear box lubricants.
Second, after a period of time to the extruder to conduct a comprehensive inspection, check all the tightening of the screw.
Third, if the production of a sudden power failure, the main drive and heating to stop, when the resumption of power supply, the cylinder must be re-heated to the provisions of the temperature and insulation for some time before the start of the extruder.
Four, such as the discovery of the instrument, the pointer to full scale, should check the thermocouple edge contact is good.