POE plastic granulation melt pump

Introduction to the Melt Gear Pump in POE (Polyolefin Elastomer) Plastic Granulation Extrusion Process:

I. Function

The melt pump primarily serves to convey, pressurize, and meter high-temperature, high-viscosity polymer melts. In the POE plastic granulation process, the melt pump stably provides the required pressure and flow rate, ensuring the quality and efficiency of granulation. Specifically, its functions are mainly reflected in the following aspects:

Pressurization and Pressure Stabilization: After pressurizing and stabilizing the high-temperature plastic melt from the extruder, the melt pump delivers it with a stable flow rate to the extruder die.

Precise Metering: By accurately controlling the flow rate and pressure of the melt, it ensures stability and quality during the extrusion molding process.

Viscosity Stabilization: It maintains the stability of the melt's viscosity, ensuring that molten materials at different temperatures maintain a consistent viscosity within the pump, avoiding issues such as blockage or poor pumping due to temperature changes.

II. Working Principle

The melt pump is a positive displacement conveying device, mainly composed of a pump casing, driving gear, driven gear, sliding bearings, front and rear end plates, gland seals, etc. Its working principle is as follows:

Feeding: When the gears rotate in the specified direction, the melt enters the tooth spaces of the two gears in the feeding area.

Material Transportation: As the gears rotate, the melt is brought into the transportation area from both sides.

Discharge: When the gears mesh again, the melt in the tooth spaces is squeezed out of the discharge area and pressed into the outlet pipeline.

As long as the pump shaft rotates, the gears press the melt toward the outlet side, so the pump outlet can reach very high pressures, while there are no high requirements for the inlet flow rate and pressure; it can even achieve inlet vacuum suction.

III. Application Fields

Melt pumps are widely used in the extrusion molding processes of plastics, resins, rubbers, and chemical fiber products, such as granulation, film production, pipe manufacturing, sheet production, plate production, artificial fiber manufacturing, optical fiber production, and medical plastic tubing. In the field of POE plastic granulation, the melt pump is an indispensable equipment.

IV. Main Characteristics

High Temperature and High Pressure: The melt pump can withstand high-temperature and high-pressure working environments, ensuring stable operation during the POE plastic granulation process.

Precise Control: By accurately controlling the flow rate and pressure of the melt, it improves the quality and efficiency of granulation.

Easy Maintenance: The melt pump's structural design is reasonable, making it easy to maintain and service.

V. Precautions

Selection: When selecting a melt pump, it is necessary to choose based on the characteristics of POE plastic and the specifications of the extruder to ensure that the pump's performance meets production requirements.

Installation: The melt pump should be correctly installed between the extruder outlet and the die to ensure that the melt can be smoothly conveyed to the die for extrusion molding.

Maintenance: Regularly maintain and service the melt pump, check the wear of gears, bearings, and other components, and replace damaged parts in a timely manner.

In summary, the melt pump in the POE plastic granulation extrusion process plays a crucial role. By accurately controlling the flow rate and pressure of the melt, it improves the quality and efficiency of granulation, providing strong support for the widespread application of POE plastics.

Email: info@battemachinery.com

WhatsApp: +86 158 38331071