Plastic extrusion machinery and products

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Lantai melt pump

The melt pump is mainly used for conveying, pressurizing and metering high-temperature and high-viscosity polymer melts. Its main function is to pressurize and stabilize the high-temperature melt from the extruder, and keep the melt flow accurately and stably fed into the extruder head. It can achieve direct adjustment and metering control to eliminate the extruder fluctuation and the impact of the screw on the die head. The extruder effectively extrude the melt and mix the resin material, but it is not effective enough to provide the die head with a constant pressure and volume of melt. The melt pump can effectively pressurize the melt and accurately meter the melt.

Benefits of melt pump: 1. Save materials 2. Increase production 3. Increase the life of the extruder 4. Faster startup 5. Lower processing temperature 6. More accurate metering control 7. Reduce waste 8. Lower shear force 9. Processable recycled materials 10. Complete specifications, can adapt to any product

Advantages of installing melt pump in extrusion production line:

1. Accurate metering. Save materials and save costs

2. Establish effective pressure for the mold. After the resin is melted and mixed by the extruder, the melt pump can provide effective pressure for the downstream equipment

3. Increase extrusion output. After installing a melt pump in the production line, the pressure on the screw head can be reduced to achieve the purpose of preferential screw efficiency.

4. Reduce the processing temperature of the material. The melt pump can reduce the heat caused by shearing by reducing the extrusion pressure, thereby improving the dimensional accuracy and finish of the product.

Features of melt pumps produced by Lantai Machinery:

1. Various metering pumps are widely used for metering and pressurization of high and low viscosity.

2. The shell material is made of chromium-nickel alloy or nickel-based alloy, tantalum alloy.

3. The gears are made of hardened chrome steel, and can also be made of other metal materials.

4. The bearings are made of graphite, NIAG, zirconium oxide or hardened tool steel.

5. The speed is adjusted by frequency conversion motor and reducer to improve the stability of die head pressure and product quality.

6. Applicable raw materials: PC, PMMA, ABS, PET, PVB, PS, PP, PE and other common plastics.

7. Melt pump product models: LT-PUMP-1CC, 2CC, 5CC, 10cc, 20CC, 31.5CC, 50CC, 100CC, 150CC, 200CC, 250CC, 315CC, 400CC, 500CC, 800CC, 1200CC.

The unique volumetric design of Lantai LT-PUMP series melt pump enables it to accurately and stably transport polymers, and is not affected by changes in conditions. The LT-PUMP series melt pump provides pressure between the extruder and the mold, and can match the parameters of the extruder to provide uniform melt under conditions of increased output and strict tolerance requirements.

For many years, in the production of the plastics industry, many polymer production equipment has used gear pumps to assist extrusion to solve various key problems. The Lantai series gear pumps work with extruders to optimize the entire extrusion process.

The extruder melts the polymer and makes it uniform, while the Lantai melt pump provides the required pressure, lightens the work of the extruder, thus reducing shear heat and required torque, and eliminates fluctuations, all of which optimize the performance of the extruder.

Benefits of using a melt pump for polymer extrusion:

©~Improved dimensional stability - effectively isolates the die from fluctuations from upstream.

©~Control of melt quality - adjust the extruder back pressure to reduce residence time, stabilize plasticizing, and reduce melting temperature.

©~Increase output - regardless of the pressure required to be established, it provides very high efficiency

©~Reduce raw material use - the final product size provided is small

©~Eliminate fluctuations and screw impact - effectively solves problems caused by melt density or extruder parameters

©~Enhanced flexibility of the extruder - allows changes in processing parts, such as: higher amounts of recycled materials, temperature and pressure, etc.

©~Crown tooth root design-reduces internal shear force on the pump

©~Reasonable operation and operation-closed loop control, PLC or intelligent instrument

©~Extend the service life of the extruder-reduce the working intensity of the extruder, such as: pressure and torque.

©~Low operating cost-provides more accurate delivery metering to avoid waste of raw materials.

LT-PUMP series melt pump | chemical delivery pump

Application and characteristicsChemical delivery pump is suitable for conveying liquids with relatively high viscosity and no granular impurities. It has the characteristics of high output pressure, high viscosity of the conveying medium, high operating temperature, vacuum inlet, convenient speed adjustment, and large flow range. The material of the pump is heat-resistant, wear-resistant, and corrosion-resistant, and has sufficient strength and dimensional stability.

Application range of melt pump

1. Applied in the polymerization reaction process to convey high-viscosity melt.

2. Applied in melt spinning as a booster pump.

3. Applied to the extruder to improve extrusion efficiency and reduce the load of the extruder.

4. Applied to convey resin and molten resin to make the melt uniform and build pressure to the die head.

The working principle of the LT-PUMP series melt pump/hot melt adhesive pump belongs to a positive displacement pump. When working, it relies on the mutual engagement of the master and driven gears to cause the change of the working volume to transport the melt. The working volume is composed of the pump body, the tooth grooves of the gears and the bearing sleeve with the function of the side plate. When the gears rotate, the melt enters the tooth grooves of the two gears in the suction chamber. As the gears rotate, the melt is brought into the discharge chamber from both sides. The gears mesh again, so that the melt in the tooth grooves is squeezed out of the discharge chamber and pressed to the outlet pipe. The bearings cannot use ordinary lubricating grease to avoid contaminating the melt. Melt self-lubrication is usually used.

Lantai Melt Pump