Internal structure and working principle of polymer melt conveying pump

The internal structure of the polymer melt pump is composed of the pump body, front and rear side plates, two meshing gears, bearings, and seals; The space formed by the tooth profile of two gears, the pump body, and the side plate forms the feeding area, conveying area, and discharge area of the pump. Gears are the core components of melt pumps, with various structural forms: they can be divided into internal meshing and external meshing according to the meshing mode;; According to the tooth direction, it can be divided into spur gears, helical gears, and herringbone gears, but the commonly used external meshing gear pumps for conveying plastic melt are involute spur or helical gears.

polymer melt pump

Working principle of polymer melt pump: It is a positive displacement conveying device, and the flow rate is strictly proportional to the pump speed. The feed area, feed area, and discharge area of the pump are composed of the tooth profile of two gears, the pump body, and the side cover plate. During work, the molten material is transported by the change in working volume caused by the meshing of the main and driven gears. The working volume is composed of the pump body, gear teeth, and bearings with side plate function (i.e. the feeding area). When the gear rotates in the specified direction, the melt enters the grooves of the two gears in the feeding area. As the gear rotates, the melt is brought into the feeding area from both sides. The re meshing of the gears causes the melt in the grooves to be squeezed out of the discharge area and pressed into the outlet pipeline.

melt pump for plastic extrusion

The specifications of melt pumps range from 0.1cc to 12000cc. The specifications of the melt pump from small to large are 0.1cc, 0.5cc, 1cc, 2cc, 5cc, 10cc, 20cc, 31.5cc, 50cc, 100cc, 150cc, 200cc, 315cc, 500cc, 800cc, 1200cc, 2500cc, 3200cc, 4000cc, 6100cc, 8500cc, 12000cc, etc. Non standard customization can also be carried out according to the actual production needs of users.

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