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2026-10-10 POE underwater cutting granulation extrusion melt pump
POE elastomer materials have the characteristics of high toughness, low modulus, and large viscosity fluctuations. In underwater cutting and granulation processes, unstable extrusion pressure can easily cause problems such as uneven particle shape, long and short particles, and bubbles. As the core stabilizing metering equipment of POE underwater cutting and granulation line, the melt pump is a key link to ensure stable granulation quality. 1、 Stabilize extrusion pressure and eliminate POE melt fluctuations Batch differences and temperature changes in POE raw materials can cause fluctuations
2026-10-08 Which Section Can the Melt Pump Actually Stabilize?
A melt pump is widely used in plastic extrusion lines, yet many users misunderstand its stabilizing capacity. It cannot fix all fluctuations in the whole extrusion system, but only stabilize a specific section of material conveying and metering under matched working conditions. The core function of the melt pump is to dampen the periodic pulsation transferred from upstream. It reduces the amplitude of upstream fluctuations passed to downstream equipment, and supplies the downstream with steady inlet flow and pressure. In this way, metering controllability is greatly improved: the pump delivers
2026-09-30 The three core functions of melt pump
Many beginners in the rubber and plastic industry wonder what is the use of installing a melt pump on an extrusion production line? The core consists of three major functions, which should be explained clearly in one article Accurate measurement Independent gears are used to quantitatively transport the melt and weaken the discharge pulsation of the extrusion host, Stable flow output and improved product size uniformity. Effective voltage stabilization Isolate the pressure fluctuations of the extruder and establish a stable melt pressure, Improve the appearance defects of films, pipes, and par
2026-09-23 The key to repairing the melt pump: not only replacing parts, but also restoring accuracy
Melt pumps are widely used in industries such as plastics, resins, rubber, and chemical fibers to transport, pressurize, and measure high-temperature and high viscosity melts. After long-term continuous operation, the equipment is prone to various faults such as gear wear, bearing clearance deviation, seal leakage, flow attenuation, and outlet pressure fluctuations. For precision volumetric equipment such as melt pumps, maintenance is not simply about replacing parts. It is necessary to conduct a systematic analysis and judgment based on the pump body structure, gear meshing status, overall fi
2026-09-20 Melt pump solves the pain points of extruder
Still tormented by pressure fluctuations, unstable discharge, and high scrap rates? The extruder is equipped with a melt pump, which directly solves most of the process pain points Melt pump receives high-temperature plastic melt from extruder Complete the boosting and stabilizing of pressure, and send the stable flow into the machine head Stable Pressure | Eliminate Pressure Fluctuations Precise flow control | Ensure consistency of extruded products Homogenized melt | more uniform material mixing Reduce pulsation | Stable product quality Reduce extruder load | alleviate temperature and pressu
2026-09-16 Melt Pump Applications in Sheet Extrusion Production Lines
A melt pump is a precision positive displacement gear pump that serves as a core auxiliary device in modern sheet extrusion production lines. Installed between the extruder and the T-die, it solves the common pain points of unstable melt pressure and fluctuating flow rates in traditional extrusion systems, becoming an essential component for high-precision, high-efficiency plastic sheet manufacturing. The core function of the melt pump in sheet extrusion is accurate metering and pressure stabilization. Ordinary extruders are prone to melt pressure pulsations caused by screw speed changes and m
2026-09-12 Why is an extruder equipped with a melt pump?
1、 The core pain point of traditional extruders: the contradiction between pressure fluctuations and energy consumption Traditional extruders need to simultaneously undertake the triple tasks of solid conveying, melt plasticization, and metering pressurization. Under high pressure conditions such as high viscosity materials or precision filters, the screw metering section needs to establish high pressure to achieve conveying, which can easily cause two core problems: firstly, high pressure leads to intensified reflux and leakage of the melt in the screw groove, resulting in a decrease in act
2026-09-09 Melt pump selection: why is there no universal model?
Many friends who choose melt pumps for extrusion, granulation, and spinning will ask: Is there a universal model that can handle all production lines with one pump? To be honest, there is no truly universal model for melt pumps, and the selection must be based on ones own on-site working conditions. The material, process, output, and pressure conditions of the pump are different, and the material, structure, sealing, and matching configuration of the pump need to be adjusted accordingly. Only by selecting the right working conditions can stable transportation and equipment durability be ensure
2026-09-04 Melt Pump for PC/PMMA Optical Lampshade Extrusion Production Line
PC and PMMA are dominant optical materials for lighting lampshades, valued for their high light transmittance, excellent weather resistance and uniform optical performance. The extrusion production of precision optical lampshades demands extremely stable melt delivery, as minor flow or pressure fluctuations will cause wall thickness deviation, surface ripples, shrinkage marks and uneven light transmission, severely compromising product quality. As a core positive displacement conveying device, the melt pump has become an essential component for high-precision PC/PMMA optical lampshade extrusio
2026-09-01 Core principle of melt pump maintenance: first investigate external working conditions before disasse
Melt pumps belong to high-temperature and high-pressure precision measuring equipment, and blind disassembly should be avoided during maintenance. Priority should be given to investigating external operating conditions (temperature, feed, back pressure), confirming the presence of internal mechanical faults, and then implementing standardized disassembly and maintenance procedures to avoid human expansion of equipment damage. 1、 Fault diagnosis sequence: check layer by layer from outside to inside The temperature system checks the temperature control accuracy of the pump body and supporting
