The machinery of plastic extrusion equipment development need to meet energy saving and high efficiency requirements

The machinery of plastic extrusion equipment development need to meet energy saving and high efficiency requirements----experts say that the development trend of Chinese plastic machinery should toward combination structure customization、serialization, standardization, complex, miniaturization, large-scale, individuality, intelligentize, and satisfy the energy saving, material saving, high efficiency requirements at the same time.

High speed, high yield extruders can make the invsetors obtain arger output and high returns with low cost. But, the high speed of extruder screw also brought a series of difficulties to overcome : such as the material:the reduction of the time of material stay in the screw can lead to material plastication and mixing uneven, and the material suffered excessive shearing may cause the warming of materials rise rapidly and thermal decomposition,the difficulties of extrusion stability control can cause the fluctuation of extrudate geometric size ,  the precision of related auxiliary device and the control system must be improved, the wear down of screw and barrel is aggravating which need to adopt high wear- resisting and ultrahigh wear-resisting material, all problems of improving the service life of reducer and bearing in high speed running conditions need to be resolved.

High efficiency of the high efficient 、mutifunctional plastic extruder mainly reflects in high yields, low energy consumption, low manufacturing costs. In functional field, screw extruder has not only used for extrusion molding and compounding processing of the polymer, its use has broaden to food, forage, electrical carbon, electrode, the fire explosives, building materials, packaging, paper pulp, ceramics, etc. In addition,the "one-step extrusion work art" of the extrusion grnuation and extrusion molding will be worthed paying attention to.

Large-scale and precise extrusion molding equipment can reduce the production cost, its abvious advantages reflect in large –scale twin screw granulation units, blown film line, pipe extrusion units. The significant technology equipmen which is needed for The national key construction services , the large-scale extrusion granuation unit, one of the three key equipments ,which is equipped for the large-scale ethylene project long-term dependence on imports,so we must accelerate the domestication process, to meet the development requirements of the petrochemical industry. while precision can improve the gold content of the products, such as multi-layer coextrusion composite films all need precise extrusion, and as an important means to realize the precise extrusion——melt gear pump must intensify efforts in development research.

Modular and professionalization production can adapt to special requirements ofdifferent users, shorten the research and development cycle of new products,to strive for a bigger share of the market; while "professionalization" production can make each system module components arrange fixed point production even the global purchasing, which is very helpful to guarantee the machine quality, reduce the cost, speed up the capital turnover.

The extruders of Intelligentize and networking developed countries has already widely adopt modern electronic and computer control technology, make the online inspection and adopt Microcomputer closed-loop control for the workart parameters of the whole extrusion process such as melt pressure and temperature 、each sectional body temperature、main screws and feeding screw、the amount of feeding 、the proportion of each raw material 、Motor current and voltage and other parameters.some companies have already adopted Online remote monitoring、diagnose and control，make the network control for the extrusion molding production line.which is very favourable to guarantee the stability of workart conditions and improve the precision of products.

China plastic machinery industry has already confirmed that the "eleventh five-year plan" development strategy is: closely around national key project and pillar industry needed plastic machinery, develop toward high efficiency, energy saving, material saving, environmental protection, large-scale, precision, multilayer, and strive to improve the technical content of the existing products. We Believe that this strategy will make a further promotion for the development of China plastic machinery industry.