Detailed explanation of the characteristics of eva optical fi
Zhengzhou Batte is a manufacturer specializing in the production of melt gear pumps. It provides a variety of large-scale melt gear pumps for domestic large-scale chemical fiber and resin plants. The displacement ranges from 0.1CC to 12000CC, which can meet the production needs of different users. . Compared with the ordinary extruder melt gear pump, what are the characteristics of the eva optical film melt gear pump, which will be explained in detail below:
Five design advantages of melt pump for EVA resin.
1. The temperature control is electric heating + circulating water temperature adjustment. The EVA modified adhesive resin must have sufficient time to activate the acid anhydride during co-extrusion to ensure sufficient adhesive force. Therefore, the temperature setting is very important. In order to prevent the degradation of EVA due to excessive processing temperature, the processing temperature should be limited to 238 degrees. The inside of the melt pump for EVA resin is designed with circulating temperature-controlled water to adjust the temperature.
2. There is no dead angle in the design of the runner, and the internal circulation runner has a smooth arc transition. Excessive temperature or dead angle in the extrusion process will cause the EVA resin to stay too long, which may cause the resin to age. Therefore, the retention time will also affect the quality of the film. The design concept of the EVA resin melt gear pump is the same as that of the rubber gear pump. There is no dead angle inside, and the circulating lubrication channel is even and smooth.
3. The temperature of the gear shaft is controlled by circulating water. Gear meshing and conveying resin compound will generate shear heat by itself. In order to avoid excessive temperature rise, the shaft center is designed with circulating temperature-controlled water, and the shaft head is equipped with a rotary joint.
4. Adopt helical tooth design. The gears of the EVA resin melt pump adopt helical meshing, and the meshing runs smoothly. Productivity is increased and shearing is reduced.
5. The seal is a maintenance-free spiral seal. To avoid the influence of the residue of the conventional packing seal on the product, the EVA resin melt pump seal adopts the screw seal.
It is recommended to use a universal coupling to connect the reducer and the eva optical film melt gear pump to eliminate the influence of thermal deformation; the eva optical film melt gear pump is a positive displacement pump, which can be adjusted by adjusting the speed of the pump. For the output flow, it is recommended to adopt the frequency conversion speed regulation method, which can realize the near-linear flow output of the melt gear pump. The flow rate of the melt gear pump is related to the working speed, material viscosity and working pressure. For specific selection, please consult info@battemachinery.com