The granulated film extrusion equipment
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The composition structure: Plastic granulator is composed of mainframe extruder, extrusion system, transmission system and heating cooling system components. Plastic extrusion granulation equipment system: Extrusion system comprises a screw and barrel, hopper, head, and mould, plastic by extruding and plasticizing system into a homogeneous melt, the establishment of pressure in this process and, by continuous extrusion head screw. (1): is the main component of screw extruder, it is directly related to the scope of application of the extruder and productivity, made of alloy steel by high strength corrosion resistance. (2) barrel: is a metal cylinder made of composite steel pipe, the general use of heat resistance, high tensile strength, strong wear resistance and corrosion resistance of the alloy steel or alloy steel lining. Machine barrel and screw fit, realization of the plastic crushing, softening, melting, plasticizing, exhaust and compaction, and to the forming system of continuous uniform delivery of rubber material. General barrel length to its diameter 15 ~ 30 times, in order to make plastic fully heating and fully plasticizing principle. (3) at the bottom of the hopper is provided with a hopper: cut-off device, so as to adjust and cut off the material flow, the hopper side is provided with a viewing hole and calibration of metering device. (4) die and die: die made of alloy steel and carbon steel inner sleeve is arranged in the outer sleeve, die mould. The nose is the role of the transformation of plastic melt rotary motion into linear motion of parallel, uniform and stable the die sleeve, and endowed with the necessary plastic molding pressure. Plastic in the barrel plasticizing compaction, the porous filter plate along a certain passage through the nose into the head neck mold, mold core die sleeve with appropriate, to form an annular gap section decreases, the plastic melt tubular continuous dense formed around the core wire coating layer. In order to ensure the nose plastic flow reasonably, eliminate the accumulated plastic dead, often resettlement shunt sleeve, to eliminate the pressure fluctuation of plastic extrusion, also have the equalizing ring set. The head is also provided with a device for mould correction and adjustment, easy to adjust and correct mold core and the die sleeve concentricity. The transmission system: The drive system is the role of the drive screw, screw supply needed during extrusion torque and rotational speed, usually by motor, reducer and bearings etc.. Heating and cooling device: Heating and cooling is a necessary condition for plastic extrusion process can be carried out. (1) now extruder is usually divided into resistance electric heating, heating and induction heating, heating tablets on the fuselage, neck, head of each part of the machine. Heating device is composed of an external heating cylinder plastic, so that the temperature, in order to achieve the desired temperature process operation. (2) cooling device is to ensure that the plastic in the temperature range of technological requirements and settings. Specifically for the excess heat generated shear friction screw rotation exclusion, in order to avoid high temperature plastic decomposition, scorch or difficult determination. Engine cylinder cooling water cooling and air cooling is divided into two kinds, the small and medium extruder adopts air cooling is more appropriate, large use more water or two forms combined with cooling; screw cooling mainly adopts a central water cooling, the purpose is to increase the solids conveying rate, stable glue volume, at the same time, improve product quality; but in the hopper at cooling, one is to strengthen the role of conveying of solid materials, prevent heats the plastic grain sticky jam feeding port, two is to guarantee the normal work of the transmission part. Auxiliary equipment: |
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