Melt pump used in plastic strapping machine rope production line

The application of melt pumps in the plastic strapping and cord production line is a topic worth exploring. Below is a detailed analysis of the application of melt pumps in this field:

I. Basic Functions and Characteristics of Melt Pumps

Melt pumps are primarily used for conveying, pressurizing, and metering high-temperature, high-viscosity polymer melts. Their working principle is based on positive displacement conveying devices, where the flow rate is strictly proportional to the pump's rotational speed. The main function of melt pumps is to pressurize and stabilize the high-temperature plastic melt from the extruder, and then deliver it with a stable flow rate to the extruder die. This type of pump has the ability to stabilize the pressure and flow rate of the molten material, superior to various types of extruders.

II. Application of Melt Pumps in Plastic Strapping and Cord Production Lines

Stabilizing the Extrusion Process:

In plastic strapping and cord production lines, melt pumps can ensure stable conveyance of high-temperature melts, thereby stabilizing the extrusion process. This helps reduce fluctuations during extrusion, improve product dimensional accuracy, and reduce waste rates.

Improving Production Efficiency:

The use of melt pumps can enhance the overall efficiency of the production line. By stabilizing the conveyance and pressurization of melts, they assist extruders in operating under low pressure and temperature conditions, thereby reducing leakage flow and increasing output.

Energy Saving and Consumption Reduction:

Since melt pumps can effectively establish die pressure and reduce the backpressure of extruders, this helps reduce energy consumption and extend the lifespan of machinery.

Adaptability to Various Materials:

Melt pumps can process various polymer materials, such as PE, PC, PP, PVC, etc., making them have broad application prospects in plastic strapping and cord production lines.

III. Practical Application Cases

In plastic strapping production lines, pump melt gear pumps for plastic extruder are typically used in series with single-screw or co-rotating twin-screw extruders. For example, in fully automatic PET plastic strapping production lines, melt pumps can ensure stable conveyance and pressurization of PET melts, thereby improving production line efficiency. Additionally, in some advanced production lines, multiple small-to-medium-sized extruders are configured to simultaneously feed a single melt pump to achieve efficient extrusion of large-scale products (such as large-diameter pipes, wide plates, films, etc.).

In summary, melt pumps have extensive application value in plastic strapping and cord production lines. They can stabilize the extrusion process, improve production efficiency, save energy and reduce consumption, and adapt to various materials. With the continuous development of the domestic plastic processing industry, the application prospects for melt pumps will become even broader.

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