Application fields, composition structures, and materials of melt pumps for sheet and film extrusion
Extrusion melt pumps are widely used in fields such as sheet materials, blowing and salivation films, spraying, textiles (fibers and non-woven fabrics), EVA, mixing, granulation, biodegradable materials, etc. Under constant pressure, the melt pump has a lower shear stress design, which reduces the energy consumption of the extruder, lowers the working temperature, and improves the output rate.
The structure of the extruder melt pump is mainly composed of a pump casing, front and rear side covers, gear shaft, sliding bearings, and shaft seal. Its main advantages are as follows: 1. Minimal pressure and flow pulsation, which can achieve linear output of flow and is suitable for precision extrusion systems; 2. Adopting different structures and material configurations for different working conditions to better meet the personalized needs of users; 3. Can be applied to high temperature (350 ° C), high pressure (40MPa), and high viscosity (40000 Paos) working conditions; 4. Precision structure, high precision, and long service life.
Parameters of melt pump for sheet and film extrusion
Transmission medium viscosity: 0.01~40000 Pa · s
Inhalation pressure: 0-30MPa
Output pressure: 0-40MPa
Permissible pressure difference: 25MPa
Operating temperature: ≤ 350 ℃
Heating method: Electric heating
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