A Study Of Biaxial Self-Reinforcing PVC-U Plastic Pipes Molding Technics And Equipment

PVC-U pipes play an important role in numerous plastic pipes, and it process many merits, such as light mass, rust-resistant, little resistance in course of flow transportation, well -isolation, keeping water quality, not furring, low price, and so on. PVC-U pipes is very convenient in course of process, and raw materials is enough. So PVC-U pipes are popular used in the fields of industry, agriculture and daily life.The strength of the common PVC-U pipe in the axial direction is larger than in the circumferential direction because the molecules are oriented in axial direction duo to drawing effect of the auxiliary machine. Yet enhancing the axial intensity can't improve the hydraulic strength of PVC pipes. Thus how to enhance the pipe's circumferential strength becomes a hotspot in domestic and overseas research.In this paper, the expansion method by fabric bag has been introduced in the production of oriented PVC pipes. The reinforced PVC-U pipe's orientation mechanism and expand technics were researched. Especially, the author researched the expansion temperature, expansion...