Specific application cases of plastic sheet extrusion melt pump

The specific application cases of the melt pump in plastic sheet extrusion are mainly reflected in the following aspects:

I. The Role of Melt Pump in Plastic Sheet Extrusion Process

The melt pump plays a crucial role in the plastic sheet extrusion production line. It is primarily utilized for the transportation, pressurization, and metering of high-temperature, high-viscosity polymer melts. By precisely controlling the flow rate and pressure of the melt, the melt pump ensures the stability of the extrusion process and the consistency of product quality.

II. Specific Application Cases

Application Case of Zhengzhou BATTE Company

Background: Zhengzhou BATTE has accumulated rich experience in melt pump application technology, particularly in the field of precision extrusion of plastics and rubbers.

Application: The melt pumps produced by the company are widely used in plastic sheet extrusion production lines. Leveraging their efficient transportation and pressurization capabilities, they achieve precise control over the melt flow rate, enhancing the extrusion accuracy and surface quality of the sheets.

Effect: After adopting the melt pump, the extrusion speed of the sheets became more stable, and the thickness uniformity improved significantly, leading to reduced waste rates and production costs.

Application Case of Wood-Plastic Composite Extrusion Line

Line Overview: The wood-plastic composite extrusion line is primarily used for the extrusion of materials such as PVC + wood powder, producing skirting boards, door trims, door frames, and other profiles.

Role of Melt Pump: In this production line, the melt pump pressurizes and stabilizes the high-temperature melt from the extruder, maintaining a precise and stable flow rate into the extrusion die, thereby ensuring uniform extrusion of the sheets.

Effect: The application of the melt pump significantly improved the production efficiency and quality of wood-plastic composites, meeting market demands for high-quality products.

Application of High-Temperature Melt Pump in Microcellular Plastic Sheet Extrusion

Microcellular Plastic Characteristics: Microcellular plastics exhibit excellent comprehensive properties, and their foaming process requires high pressure and rapid pressure drop rates.

Application Method: In microcellular plastic sheet extrusion equipment, a high-temperature melt pump is typically installed at the rear of the extruder barrel. It utilizes the pressurization effect of the gear pump to increase the melt pressure. As the gas/polymer system enters the gear pump, the enclosed space gradually decreases with the rotation of the gears, increasing the melt pressure. After exiting the melt pump, the system rapidly releases pressure, forming numerous bubble nuclei, which are then solidified and shaped into microcellular plastic sheets.

Effect: The application of the high-temperature melt pump stabilized and controlled the foaming process of microcellular plastic sheets, enhancing the uniformity of bubbles and mechanical properties of the products.

The specific application cases of the melt pump in plastic sheet extrusion demonstrate its indispensable role in plastic extrusion production lines. By precisely controlling the flow rate and pressure of the melt, the melt pump significantly improves the stability of the extrusion process and the consistency of product quality. With the continuous development of plastic processing technology, the application areas of the melt pump will continue to expand and deepen.

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