Maag/Nordson/Zenith/Witte/Coperion melt gear pumps have long dominated the mainstream market in production lines such as BOPP biaxially oriented films, CPP cast films, PET films, synthetic fiber spinning, and high-end sheet materials that require strict operational stability. But in recent years, the industry has undergone significant changes: China's melt gear pumps have gradually transitioned from "price substitution" to "technology substitution".
1、 Key breakthrough from 'usable' to 'long-term stable operation'
The working environment of the melt gear pump is extremely harsh: high temperature, high pressure, conveying high viscosity polymers, and requires 24-hour continuous operation. The equipment not only needs to complete melt conveying, but also needs to ensure stable pressure, constant flow rate, and accurate measurement.
After years of iteration, the Chinese melt gear pump has been continuously polished in terms of overall structural design, machining accuracy, and material selection, resulting in a significant improvement in overall stability. Zhengzhou Bart has further strengthened the equipment's adaptability to complex working conditions such as high temperature and high pressure by optimizing the flow channel inside the pump body, optimizing gear parameters, and upgrading precision machining processes.
2、 Comprehensive upgrade of core component manufacturing strength
The core competitiveness of the melt gear pump never lies in the casing, but in the key internal components.
①Iterative upgrade of gear machining accuracy
Gears are the core components of melt pumps for precise metering and conveying.
In the early days, the gear machining accuracy of Chinese equipment was insufficient, which easily led to a series of problems such as flow fluctuations, pressure pulsations, loud noise, and fast wear.
Nowadays, relying on precision machining, tooth profile optimization, and fine control of meshing clearance, the smoothness of domestic gear operation has been greatly improved. For precision production lines such as film and spinning, the level of gear processing directly determines the quality of the final product.
② Iteration of Materials and Heat Treatment Processes
The melt gear pump is exposed to high-temperature melt and corrosive materials for a long time, and continues to operate at high loads. Ordinary materials are difficult to meet production needs.
High end Chinese melt gear pumps commonly use high-strength alloy steel, combined with exclusive heat treatment and surface strengthening processes, effectively improving equipment wear resistance, heat deformation resistance, and extending the service life of the entire machine.
3. Channel design benchmarking international standards to reduce material degradation risks
Many people tend to overlook that the internal flow channel design of the melt gear pump directly affects the product quality of the entire production line.
Unreasonable channel design can cause many problems such as melt retention, local degradation, increased black spots in the product, and excessive pressure loss.
At present, China attaches great importance to the research and development of flow channels for melt pumps
Low resistance channel design to reduce pressure loss during melt conveying process;
Optimization of seamless flow channels to shorten material retention time.
For the processing scenarios of heat sensitive materials such as PET, PA, TPU, etc., it can effectively avoid material degradation and better adapt to the production of new materials.
4.Breaking away from standardization and highlighting the ability to adapt to customized chemical conditions
One major advantage of the equipment used by top enterprises in the past was a mature and complete standardization system.
And now Chinese equipment has formed a unique competitive advantage: flexible customization capabilities that better meet different on-site needs.
Some plastic extrusion enterprises have huge differences in process conditions, and for the same plastic extrusion, the performance requirements of the melt pump are completely different for films, pipes, sheets, wire drawing, and granulation.
BOPP film production line: Emphasize stable pressure, uniform flow rate, and ensure consistent film thickness;
Plastic wire drawing production line: focusing on precise measurement, ensuring stable wire diameter, and reducing wire breakage;
Recycling granulation production line: requires high load, high wear resistance, and large flow output.
Plastic extrusion manufacturers with significant differences can customize and develop targeted solutions based on actual production volume, material characteristics, pressure and temperature parameters, and on-site installation dimensions, which is also a core bonus for achieving substitution in China.
5. China's melt pump accelerates its entry into various high-end application scenarios
With the improvement of technological strength, the application boundaries of Chinese melt gear pumps continue to expand, and have been widely implemented in various high-end fields
Film industry: BOPP, CPP, PET film, various functional films;
Extrusion industry: pipes, plates, sheets, profiles;
Chemical fiber industry: PET spinning, PA spinning;
New materials industry: PLA, PBAT, TPU, hot melt adhesive, etc.
Zhengzhou BATTE is deeply engaged in the research and development of melt gear pumps and melt measuring equipment, providing professional melt conveying solutions for the plastic, chemical fiber, and polymer industries.
Email: sale@meltpump.com
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