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”.
Because the floor heating pipe is a coil, a bundle of 200-300m, the deviation of the middle pipe is not easy to find, and there will be potential quality problems. PE-RT pipe production requires that the good properties of the raw materials be "duplicated" to the pipes, and it is hoped to realize continuous and rapid extrusion, so as to produce high-quality products and better economic benefits. It must require advanced equipment and high accuracy of control instruments. Therefore, the main extruder design is very important, otherwise the output and quality are difficult to meet the requirements. The main extruder of the production line usually adopts Φ 65 screw, the output can reach 250kg / h, and the stable production speed can reach more than 15-25m / min. The above design strives to perfectly combine all processes from the perspective of technology and economy, so as to achieve the best performance and cost performance. Due to the high viscosity of PE-RT melt, the extruder adopts high torque output, imported thrust bearing, and the gear is made of special alloy and special heat treatment, which reduces noise and heat loss; the extrusion operation adopts advanced control system to ensure the stable, safe and high-speed extrusion of PE-RT.
In the process of PE-RT pipe processing, if the control is poor in the process of raw material melting, pipe blank forming, cooling sizing, etc., the mechanical properties of the pipe will be reduced due to the decomposition of raw materials, the orientation of molecular chains or the crystallization during cooling. The plasticization of raw materials and the cooling sizing of pipe blank are the key to control the extrusion quality. For extrusion equipment, the following points should be met:
(1) Low melt temperature should be adopted to minimize the decomposition of raw materials in the process of melting and plasticization.
(2) The melt has excellent and uniform properties, and the polymer molecular chain is not oriented along the longitudinal direction in the tube blank forming process.
(3) Achieve uniform cooling and reduce the internal stress of the pipe.
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.