Double shaft drive melt pumps

Double shaft drive melt pump is a kind of equipment specially used for high temperature and high viscosity polymer melt conveying, pressurizing and metering, and its core design lies in the adoption of double shaft drive structure, through two independent drive shafts synchronously drive the rotation of gears in the pump body, so as to realize the stable conveying and accurate metering of the melt. The following is a detailed analysis of the structural characteristics, working principle, performance advantages, application areas and selection points:

The working principle of double shaft drive melt pump is similar to that of ordinary melt pump, but the design of double shaft drive makes its work more stable and efficient. When the motor drives the two drive shafts to rotate, it drives the two gears in the pump body to rotate synchronously. During the rotation, the gears suck the melt from the feed zone, and through the meshing action of the gears, the melt is transported to the discharge zone and finally pressed to the outlet pipe. Due to the double shaft drive design, the meshing between the gears is smoother and reduces pulsation and vibration, thus improving the efficiency and stability of the melt transfer.

Areas of application

Twin shaft drive melt pumps are widely used in many fields such as plastics, chemical fiber, rubber, etc. They are mainly used for conveying, pressurizing and metering high temperature and high viscosity polymer melts. Specific applications include:

Plastics processing industry: to ensure stable melt conveying and accurate metering during the production of sheets, plates, pipes, films, etc.

Chemical fiber and resin industry: as a reactor discharge pump, to cope with high temperature and high viscosity polymer melt reaction conveying.

Rubber industry: installed between the extruder outlet and die head, as a melt metering pump, to ensure stable production and high quality of rubber products.

Selection points

The following key factors need to be considered when selecting a double shaft drive melt pump:

Melt viscosity:

The viscosity of the melt has a direct impact on the selection of the pump. Different viscosity of the melt requires different types of pumps and different pump specifications.

Flow & Pressure:

According to the flow rate and pressure range required by the process, select the pump type and specification that can meet the demand.

Material and corrosion resistance:

According to the nature of the melt and process requirements, select the pump material that can withstand the appropriate pressure and temperature, and ensure that the pump structure can meet the requirements of corrosion resistance.

Sealing performance:

As the melt pump in the high temperature, high pressure conditions, and the transport medium has a high viscosity and a certain degree of corrosiveness, so the sealing performance of the pump is particularly important. Need to choose high-quality sealing materials and structures to ensure that the pump will not leak media during operation.

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