吴大鸣教授课件1.ppt

Study on the Equipment for Manufacturing Biaxial Oriented Self-reinforced PVC Pipes双轴取向PVC自增强管材生产设备的研究 Institute of Plastics Machinery Engineering Beijing University of Chemical Technology Do Everything Possible to Orientate the materialsin Plastics Processing in the Past Decades Reinforcement By orientation High Impact resistance at low temperatures高的低温冲击强度 Some examples for the oriented articles Because orientation is an efficient and economic method to get self-reinforcement plastic articles, people has done everything possible to orientate the materials in plastics processing. Oriented pipes : the last virgin soil for us! Pipe Weight Saving 减重效果明显！ General Savings / Economics 2. General Situation of RD of PVC-O Pipes 1970 GB, Yorkshire Imperial Plastics “Superpolyoprc”: PVC-O pipes 1984 Austrilia, Vinidex Tubemaker company 200 kilometer PVC-O pipe line in Austrilia 1990~1994 USA, Uponor-ETI company hundreds mile of PVC-O pipe line in USA 1990’s Netherland, WAVIN GROUP France Seperef company The main difficulties for manufacturing oriented pippes: The uniform and continuous radial expansion The control of necessary expansion speed The control of cooling speed after orientation On line evaluate the orientation degree Patented method : Expand with high pressure water “Die Drawing” method : invented by Prof. Ian M Ward, Leeds Univ. Lab of Solid Phase Processing at Bradforld Univ. Rotating Conical Mandrel 3. Research on PVC-O at IPME Bag Expansion (B-E) Method by IPME Bag Expansion Process Predict of necessary heating time of the parison pipe Determination of duration of pressure keeping Performance of PVC-O Pipe Evaluation of Orientation of PVC-O Pipes with Ultrasonic Unit Ultrasonic Evaluation Further R D in PVC-O Modification of Mechanical Device : continually and high efficiency Pipe formulation: Lead free, expanding capability In situ evaluation and control of the orientation