Application areas of extrusion melt pumps
Extrusion melt pumps are widely used in the fields of sheet, blown and salivated films, spraying, textiles (fibers and nonwovens), EVA, compounding, pelletizing, and biodegradable materials. At constant pressure, melt pumps have a lower shear stress design, reducing the energy consumption of the extruder, lowering the operating temperature and increasing the output rate.
Extruder melt pump structure
Extruder melt pump structure is mainly composed of by the pump casing, front and rear side cover, gear shaft, sliding bearings and shaft seal. It has the following four main advantages:
1, very small pressure flow pulsation, can realize the flow of linear output, suitable for precision extrusion system;
2, for different working conditions using different structure and material configuration, to better meet the user's individual needs;
3, can be applied to high temperature (350 ° C), high pressure (40MPa), high viscosity (40,000Paos) working conditions;
4, Precise structure, high precision, long life.
Material of melt pump for sheet film extrusion
For the standard type extrusion melt pump, the pump casing and gears are made of nitrided steel, and the bearings are made of tool steel, which have good abrasion resistance, high toughness, high cost performance, and are suitable for most of the working conditions with low abrasion. For high abrasion-resistant extrusion melt pumps, the pump casing is made of nitrided steel, and the gears and bearings are made of tool steel, which has high strength and high abrasion resistance and is suitable for abrasive wear conditions. For high corrosion-resistant melt pumps, the pump casing is made of stainless steel, and the gears and bushings are made of tool steel, which have high corrosion resistance and are suitable for highly corrosive working conditions.
Parameters of melt pump for sheet film extrusion
Conveying medium viscosity: 0.01~40000Pa-s
Suction pressure: 0~30MPa
Output pressure: 0~40MPa
Permissible differential pressure: 25MPa
Operating temperature: ≤350℃
Heating mode: electric heating
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