What are the application ranges of melt pumps for blown film extruders?

The application scope of the melt pump for blown film extrusion machines is quite extensive, primarily encompassing the following areas:

I. Primary Application Areas

Blown Film Process:

The melt pump for blown film extrusion machines plays a pivotal role in the blown film process by steadily conveying the melt, ensuring the continuity and stability of the blown film process. This, in turn, enhances the quality and production efficiency of blown film products.

Plastic Film Production:

It is suitable for the production of various plastic films, such as polyethylene (PE) and polypropylene (PP) films through the blown film extrusion process. These films are widely used in packaging, agriculture, construction, and other fields.

II. Other Related Application Areas

In addition to the blown film process, the melt pump for blown film extrusion machines can also be applied in the following related fields:

Sheet Extrusion:

During sheet extrusion, the melt pump provides a stable melt flow rate, ensuring the uniformity and consistency of the sheet.

Granulation:

In the plastic granulation process, the melt pump can be used to convey molten plastic to the granulator, forming uniform granular products.

Extrusion Coating:

In some extrusion processes that require coating, the melt pump can evenly coat the base material, such as metal or paper, with the melt.

Other Extrusion Molding:

It can also be used in extrusion molding processes for pipes, plates, and biaxially oriented films, ensuring product quality and production efficiency.

III. Technical Characteristics and Advantages

Pressure Stabilization and Boosting:

The melt pump has the functions of pressure stabilization and boosting. It can achieve boosting by increasing the pump body's rotational speed when the extruder or screw speed is stable. Conversely, it maintains a stable pressure when the pump body's rotational speed is constant, while the extruder or screw speed is increased.

Precise Metering:

The output volume of the melt pump is linearly related to the gear speed, allowing for precise control of the melt discharge volume by adjusting the pump's rotational speed. Thus, it serves as a highly reliable metering device.

Energy Savings:

Under constant pressure, the melt pump's low shear stress design reduces the extruder's energy consumption while lowering operating temperatures and increasing output rates.

Improved Product Quality:

The application of the melt pump significantly enhances the efficiency and precision of extrusion molding, thereby improving product quality.

In summary, the melt pump for blown film extrusion machines boasts a broad application scope and technical advantages in the plastic processing industry, making it an indispensable piece of equipment in modern plastic processing.

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