PVC single-wall bellows is a pipe made of polyvinyl chloride (PVC) composite material as the main raw material, through the extrusion blow molding process, its inner and outer surfaces are corrugated annular groove structure, both the rigidity of rigid pipe and the flexibility of hose, can be used to transport certain liquids and gases and as a casing for embedded wires. The pipe began to develop in the 70s of the 20th century, imported from abroadThe waveform includes spiral, U-shaped, C-shaped, S-shaped, V-shaped and Ω-shaped, and the waveform has a certain impact on the stiffness and strength of the tube. During production, the upper and lower folio blow molds are continuously formed, the blowing pressure is about 0.15MPa, and the extrusion temperature control refers to the segmented process standard; The forming process is to extrude the pipe blank of the circular section, and then form it in the corrugated blow mold, and the corrugated molding device is composed of the forming mold, transmission system and control system, which not only plays the role of product molding, but also plays the role of traction.
The product has the characteristics of chemical corrosion resistance, high temperature resistance, anti-aging and high strength, saving 40-60% raw materials compared with ordinary UPVC pipes, and has good electrical and flame retardant properties. It is mainly used in the fields of power communication cable protective sheaths, building threading casings, sports field drainage systems and air conditioning drainage pipes, and can be rolled and transported and adapted to prestressed anchor cable casings and other scenarios; It is also used in subway engineering, highway construction, railway construction, tunnel construction, boulevards, large and medium-sized sports fields, and in agriculture, forestry, horticulture and other waterproof and drainage fields The production line can realize the production of pipes with a diameter of 6-110mm, and some of the products adopt the process of threading iron wire.
