The hot melt gear pump is suitable for transferring high-viscosity liquids that do not contain granular impurities. It is designed for applications where stable melt delivery, pressure building, and controlled flow are required.
This pump features high outlet pressure, the ability to handle high-viscosity media, high-temperature operating suitability, vacuum-capable inlet conditions, convenient speed adjustment, and a wide flow range. Its material performance under temperature should be confirmed according to actual test reports, with sufficient strength and dimensional stability for the intended operating conditions.
Working Principle & Structure
The hot melt gear pump is a positive displacement pump. During operation, the meshing of the driving gear and driven gear changes the working volume and transfers the melt. The working volume is formed by the pump body, the tooth spaces of the gears, and the bearing sleeves that also function as side plates. As the gears rotate, melt enters the tooth spaces in the suction chamber and is carried along both sides into the discharge chamber. When the gears mesh again, the melt is squeezed out of the tooth spaces and pushed into the outlet pipeline. To avoid contaminating the melt, conventional lubricating grease is not used for the bearings; melt self-lubrication is typically adopted.
Features & Advantages
- High-Viscosity Transfer: Suitable for transporting viscous, particle-free liquids and melt materials.
- High Outlet Pressure: Supports pressure-building requirements in melt delivery systems.
- High-Temperature Capability: Designed for use with heated media in melt processing applications.
- Vacuum Inlet Compatibility: The inlet can operate under vacuum conditions when required by the process.
- Convenient Speed Adjustment: Pump speed can be adjusted to control flow according to production needs.
- Wide Flow Range: Suitable for different melt transfer and processing requirements.
Typical Applications
- Polymer reaction processes for transferring high-viscosity melts
- Melt spinning systems as a booster pump
- Extruders and injection molding machines to improve extrusion efficiency and reduce machine load
- Resin and molten resin transfer
- Melt homogenizing and pressure building before the die head