Coextrusion technology of PE three-layer coextrusion pipe equipment


Ningbo Fangli Technology Co., Ltd. is a mechanical equipment manufacturer with nearly 30 years’ experiences of plastic pipe extrusion equipment, new environmental protection and new materials equipment. Since its establishment Fangli has been developed based on user’s demands. Through continuous improvement, independent R&D on the core technology and digestion & absorption of advanced technology and other means, we have developed PVC pipe extrusion line, PP-R pipe extrusion line, PE water supply / gas pipe extrusion line, which was recommended by the Chinese Ministry of Construction to replace imported products. We have gained the title of “First-class Brand in Zhejiang Province”.



With the rapid development of social economy, according to various uses of plastic PE pipe, it is required to have the properties of mechanical strength, heat resistance, cold resistance, transparency, printability and air tightness to gas and steam. The pipe made of a single plastic can not meet all the above requirements, so it is necessary to constantly have the emergence of new plastic pipes to replace the traditional plastic pipes. Based on the gradual development of plastic PE pipe from heavy quality to light weight and from single function to multi-function, coextrusion of composite plastic three-layer PE pipe has become one of the new pipes with rapid development. Since various properties and functions of co-extruded pipes can be designed according to needs, the performance advantages of constituent materials can be brought into full play by selecting appropriate matrix and reinforcement, as well as appropriate composition ratio and arrangement and distribution, so as to obtain comprehensive properties that are difficult to achieve for single materials such as metals, polymers and ceramics, such as high specific strength, high specific modulus, corrosion resistance, high temperature resistance and superconductivity, therefore, it has gradually become the development trend of plastic PE pipes in the future.


When it comes to co-extrusion equipment, the head of PE three-layer co-extrusion pipe equipment adopts the newly designed basket head or spiral split pipe extrusion composite head, which has the characteristics of convenient adjustment and uniform discharge. The sizing sleeve adopts unique slotting process and water ring cooling to ensure the vacuum sizing and forming accuracy of pipes.


How to understand the coextrusion technology of PE three-layer coextrusion pipe equipment?


PE screw, slotted barrel and powerful water jacket cooling. The adoption of these mature technologies greatly improves the conveying capacity and ensures high-quality extrusion; high torque vertical structure reducer; DC drive motor. The basket type composite die suitable for polyolefin processing not only ensures the stability of extrusion, but also realizes low stress and high pipe quality caused by low melt temperature. The application of double cavity vacuum sizing technology and spray cooling water tank can effectively improve the yield of pipes and meet the needs of high-speed production. The multi-caterpillar haul-off is also a technical highlight. The traction force is uniform and stable. Each track is driven by an independent AC servo motor, and the driving technology controlled by a digital controller realizes accurate speed adjustment to achieve a high degree of synchronization. The high-speed and designed cutting machine is adopted, the cutting section is flat, and a strong chip suction device is equipped to reduce the maintenance work to a low level.


If you need more information, Ningbo Fangli Technology Co., Ltd. welcomes you to contact for a detailed inquiry, we will provide you with professional technical guidance or equipment procurement suggestions.


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