How to maintain some parts of pipe extruder?

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”.

Generally speaking, in today's society, among a wide variety of plastic machinery, pipe extruder is also one of the most important types. According to the material flow direction of the extrusion head and the included angle of the screw centerline, the extrusion head can be divided into right angle head and oblique angle head.

The screw extruder relies on the pressure and shear force generated by the screw rotation, so that the materials can be fully plasticized and evenly mixed, and formed through the die.

Today, let's focus on the maintenance of extruder barrel screw:

Barrel cleaning agent is used for extruder barrel screw. If the raw materials for injection products are changed frequently or the plasticizing temperature range of the residual materials in the barrel is quite different from that of the refueling, it is economical to use barrel cleaning agent in order to save raw materials and improve work efficiency. The special cleaning agent is a substance similar to rubber material, which does not melt at high temperature in the barrel and is in the shape of softened micelles in the screw thread groove. When moving forward in the screw thread groove, it can take away the residual materials and clean the barrel.

In the worn part of the extruder barrel screw, the bushing can be replaced. However, the whole bushing is usually replaced in the extruder barrel, so the maintenance cost is more expensive and it is not cost-effective. Once the screw is worn at a certain point, the melt will return to the thread, resulting in further accelerated wear of the screw and barrel. Severe wear will cause a large amount of resin to be wasted and reduce productivity. However, the occurrence of severe wear can be prevented through regular PM inspection. The maintenance strategy is to keep the screw / barrel clearance within a reasonable range.

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.