Chemical Resin Melt Gear Pump - Chemical Reactor Discharge Pump

In chemical resin production, melt gear pumps (serving as reactor discharge pumps) have become core equipment due to their advantages in stable delivery, precise metering, high-temperature and high-pressure resistance, adaptability to high viscosity, compact structure, and low maintenance costs.

Key Features

Stable Delivery: Through precise gear meshing and rotation, melt gear pumps deliver melt stably and efficiently, unaffected by pressure, temperature, or viscosity fluctuations.

Precise Metering: Since each gear tooth cavity carries a fixed melt volume, these pumps also enable accurate flow rate measurement.

High-Temperature/High-Pressure Resistance: Capable of withstanding temperatures up to 350°C and pressures ranging from 0 to 35 MPa, they suit polymer processing under extreme conditions.

High-Viscosity Compatibility: Melt gear pumps are particularly suited for conveying high-viscosity polymer melts, such as in resin and chemical fiber industries. They accommodate a wide viscosity range, from low-viscosity 0.0001 Pa•s to high-viscosity 40,000 Pa•s.

Compact Design: Melt gear pumps feature a compact design with a small footprint, facilitating easy installation and maintenance.

Low Maintenance Costs: Constructed from premium materials, the pump body exhibits excellent corrosion and wear resistance, ensuring extended service life. Proper maintenance further prolongs operational lifespan while reducing upkeep expenses.

Application Fields

Melt gear pumps find extensive use in chemical resin production, primarily in the following areas:

Polymer Extrusion Molding: Typically installed between the extruder outlet and die head, these pumps are extensively used in polymer extrusion processes for pelletizing, film, pipe, sheet, and plate production. They maintain stable pressure between the extruder and mold, align with extruder parameters, and deliver uniform melt output under increased throughput and stringent tolerance requirements.

Compounding Extrusion Pelletizing: Integrating a co-rotating twin-screw extruder with a melt gear pump into a compounding extrusion pelletizing line significantly enhances compounding quality and output. Compared to standalone twin-screw pelletizing units, this configuration substantially improves compounding quality and throughput while typically reducing energy consumption per kilogram of processed material by approximately 25%.

Direct Extrusion of Finished Products: By retrofitting a melt gear pump and specialized die heads (e.g., for tubes, sheets, or films) onto existing single-screw or co-rotating twin-screw pelletizing extruders, the pelletizing step can be eliminated for direct extrusion of finished products. This system is particularly suitable for materials requiring blend modification during extrusion, achieving energy savings through simplified production processes and reduced cycle times.

Large-scale product extrusion: Multiple small-to-medium extruders can simultaneously feed a single melt gear pump. The pump pressurizes and meters the melt before supplying it to the die for extruding large-scale products (e.g., large-diameter pipes, wide sheets, films). This configuration offers compact production lines with minimal footprint, while delivering more precise cross-sectional dimensions and easier control over extruded products.

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