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What are the functional characteristics of melt pumps?

The main function of the melt pump is to pressurize the high temperature plastic melt from the extruder, stabilize the pressure and then feed the flow steadily into the extruder head. Its ability to stabilize melt pressure and flow is superior to all types of extruders. When it is used in tandem with a single-screw or isotropic twin-screw extruder, the benefits of the entire production line are significantly increased. The main benefits of applying melt pumps are:

1, the size of the extruded products to minimize the tolerance, so that the unit weight of material to produce more products. In the extruded products of strict dimensional tolerances or products of the raw material cost is more expensive, the use of melt pumps is more necessary, more valuable.

polymer melt pump

2, will be the same direction twin-screw extruder and melt pumps combined into a mixing extrusion pelletizing production line, its mixing quality and output than a separate twin-screw pelletizing unit greatly improved. Processing each kilogram of material energy consumption can generally be reduced by about twenty-five percent.

3, in the original single-screw or isotropic twin-screw pelletizing extruder with the addition of melt pumps and tubes, plates, films and other extruder head, you can eliminate the pelletizing process directly extruded products. This system is very suitable for extruded products where the material needs to be co-mingled and modified. In addition to the advantages of Article 2 above, this system also realizes energy saving by simplifying the production process of extruded products and shortening the production cycle.

melt pump in extruder

4, can be realized with a number of small and medium-sized extruders simultaneously to a melt pump feed, melt by the melt pump pressurization and metering for the head of the extrusion of large products (large-diameter pipe, wide-width plate, film, etc.). This configuration of the production line is compact, covers an area of small; the cross-section of the extruded product size is more accurate and easy to control.

5, in the single-screw exhaust extruder equipped with a melt pump, can make the system's operation freely, excellent performance. Under high head pressure and high output, the extrusion volume can be adjusted without any bubbling.

thermoplastic melt pump

In the extrusion line due to the cost of additional melt pump system, which is offset from the benefits of the many benefits above, generally in six months or less time to recover the investment. Melt pump auxiliary plastic extrusion in industrialized countries has become increasingly widespread, while the domestic plastics industry due to the level of development of the limitations of the past application less. With the domestic plastics processing enterprises also fierce competition, people will have to extruded products of high quality and high precision requirements; the extrusion process of energy-saving requirements as well as the requirements of the processing equipment for the high yield and low energy requirements to give more attention. As soon as possible to adopt the melt pump technology is to meet the requirements of this area of effective practice and a wise move.

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