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2025-01-23 What are the characteristics of melt metering pumps in plastic extrusion processing?
Here are the prominent characteristics of melt metering pumps in plastic extrusion processing: Enhanced Output Stability Precise Flow and Pressure Control: Melt metering pumps, through precise control of flow and pressure, can significantly reduce pressure fluctuations caused by factors such as uneven material feeding, temperature fluctuations in the barrel and die head, and screw speed pulsations. This ensures that the melt enters subsequent processes in a stable state. Stable Product Quality: Stable melt output contributes to improved dimensional accuracy of extruded products, reducing waste
2025-01-21 The three main functions of metering pumps in plastic filament extrusion lines
The melt metering pump in a wire drawing machine plays a crucial role in the drawing process, mainly encompassing the following three aspects: Precise Flow Control The metering pump of a wire drawing machine can control the melt flow with high precision. During the drawing process, the melt needs to pass through the spinneret at a stable and accurate flow rate to ensure that the formed wire has a uniform diameter. By precisely adjusting its output flow rate, the metering pump can adapt to the production needs of different wire specifications. For instance, when producing high-end fibers with f
2025-01-18 Operating temperature and working pressure of polymer melt gear pumps
The operating temperature of polymer melt gear pumps can generally reach 300C, meeting the requirements of most plastic melt conveying processes. Some melt pumps made of high-temperature-resistant materials can withstand temperatures up to 500C. Melt gear pumps are primarily used for conveying, pressurizing, and metering high-temperature, high-viscosity polymer melts. They are widely applied in the extrusion molding of plastics, resins, rubbers, and chemical fiber products. The working pressure of melt gear pumps is usually represented by three parameters: inlet pressure, outlet pressure, and
2025-01-17 Rubber extruder gear pump
In the field of rubber and elastomer processing, rubber extruder gear pumps play an extremely important role. As a key equipment connecting the outlet of the extruder and the die head, it plays a decisive role in the precise measurement and stable transportation of the melt, directly affecting the quality and production efficiency of the final rubber products. The gear pump of rubber extruder is mainly composed of core components such as pump body, gear, shaft, and sealing device. The pump body provides a solid shell support for the entire gear pump, ensuring the stable operation of internal c
2025-01-15 PP Wiredrawing Melt Pump
Definition and Basic Principle The PP wiredrawing melt pump is a key piece of equipment used in the polypropylene (PP) wiredrawing production process. Its main function is to accurately convey PP materials in a high - temperature molten state. Its working principle is based on that of a gear pump. Through a pair of meshing gears rotating inside the pump body, the melt is sucked in from the inlet and then, driven by the gears, is conveyed along the flow channels of the pump body to the outlet. During this process, the rotational speed of the gears and the volume between the teeth determine the
2025-01-08 Main Configuration and Material of Key Components of Melt Gear Pump
A complete melt gear pump unit consists of the gear pump, flange assemblies, coupling assemblies, reducer, motor, motor-end coupling (configured as needed), coupling guard, base, and other auxiliary devices. The primary structural materials for the melt gear pump are as follows: Pump casing: stainless steel/alloy steel/corrosion-resistant alloy; Gears: nitride steel/tool steel/stainless steel + coating/corrosion-resistant alloy; Bearings: tool steel/copper alloy/stainless steel + coating/corrosion-resistant alloy, etc. The melt gear pump features an optimized tooth profile design for more stab
2025-01-02 What are the common fault causes of plastic bottle extrusion melt pumps?
Plastic bottle extrusion melt pumps play a crucial role in the plastic extrusion molding process, but they may also experience various faults. Below are some common fault causes and corresponding solutions: 1. Non-rotating Melt Pump Fault Cause: The shaft and shaft sleeve are seized. Solution: Disassemble the melt pump and send it back to the factory for repair. 2. Material Leakage Fault Causes: Leakage at the seal. Leakage at the cover plate. Solutions: For seal leakage, try passing cooling water or air, and replace the packing or seals. For cover plate leakage, after heating the melt pump, r
2024-12-31 What are the applications of melt pumps in the rubber industry?
The applications of melt pumps in the rubber industry are extensive, mainly reflected in the following aspects: I. Transportation and Pressurization of Rubber Melts Melt pumps are primarily used for the transportation and pressurization of rubber melts. During the rubber production process, melt pumps can pressurize and stabilize the high-temperature rubber melts from the extruder before stably delivering them to the extruder die. This process ensures stable pressure and precise flow rate of the rubber melts during transportation, avoiding common issues such as pressure fluctuations and uneven
2024-12-27 Application and Characteristics of Rubber Extrusion Melt Pumps
Rubber extrusion melt pumps are crucial equipment in rubber extrusion systems, serving functions such as melt conveying, pressure boosting, pressure stabilization, and metering. The following are the specific applications and characteristics: Applications Rubber melt pumps are widely used in the extrusion molding fields of plastics, resins, rubber, and chemical fiber products, including but not limited to the production of granulates, films, pipes, sheets, plates, artificial fibers, optical fibers, and medical plastic catheters. In the manufacturing of automotive rubber components, such as tir
2024-12-23 What is the role of the metering pump in a PP (Polypropylene) fiber drawing extrusion line?
In a PP fiber drawing extrusion line, the metering pump plays a vital role. Its main functions can be summarized as follows: Precise Control of Melt Flow Rate The metering melt gear pump can control the flow rate of PP melt with high precision. During the fiber drawing process, the melt needs to pass through the spinneret with a stable and accurate flow rate to ensure that the formed fiber has a uniform diameter. By precisely adjusting its output flow rate, the metering pump can accommodate the production requirements for different fiber specifications. For example, when producing high-end fib
