N-Lamina Model of Extrusion Pressure of Non-Plug Flow Solid Conveying in Feeding Section by Single-Screw Extrusion Molding

Abstract:

While extrusion molding with single-screw extruder, extrusion pressure comes into being from feeding section; it is one of the basic conditions to ensure that extrusion process can be carried on normally, in order to ensure molding process goes smoothly, it must meet the following requirement: extrusion pressure generated during the process must be sufficient. Therefore it has certain engineering significance to design structure of a single screw correctly that a mathematical model for formation of extrusion pressure during single-screw extrusion molding will have to be established. This paper conducted a research on theory of extrusion pressure when powder of pure UHMWPE resin is still in feeding section by molding in barrel of the single screw extruder specially designed for pure UHMWPE, and established a n-lamina model of powder materials or grain materials which is in feeding section and at the state of non-plug flow solid conveying, and it provided a method to calculate extrusion pressure of the n-lamina model, thus it enriched and perfected theory of single-screw extrusion molding.

• Periodical: Advanced Materials Research (Volume 221)
• Pages: 271-277
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.221.271
• Online since: March 2011
• Authors: Chun Hui Liu, Jian Hua Qin, Da Li Shi
• Keywords: Extrusion Pressure, Feeding Section, Molding in Barrel, Non-Plug Flow, Solid Conveying

References

[1] Fuhua Zhu:  Extrusion Theory and Application (China Light Industry Publishing House, Beijing 2001).

[2] Shunliang Jiang, Fuhua Zhu: Trilamina Method of Non-plug Solid Conveying in Single-screw Extruder (China Plastics Industry, Sichuan 1997，2；83-88).

[3] Chunhui Liu: Research on the Extrusion Pressure of Solid Transfer of Non-plug Flow in the Feed Section of Single-screw (Master thesis，Wuhan Institute of Technology 2010).

[4] Jianhua Qin, Guangjun Wang: The research on UHMWPE single screw extruding process theory (Materials for Mechanical Engineering Feb 2007： 34～37).

[5] He Ji-min, Xue Ping, He Ya-dong, Zhu Fu-hua: Research on Conveying Mechanism of Ultra High Molecular Weight Polyethylene Single-screw Extrusion (Polymer Materials Science and Engineering 2001(1): 27~30).

[6] Yanglun Xieshuxian translated: Experiment Manual of Powder Engineering (written by Sanshumaoxiong, Rigaozhongzhu 1984 Japan).

[7] Zehev Tadmor Costas G. Gogos: Principles of Polymer Processing (A Wiley-Interscience Publication , American 1979. ).

DOI: 10.1002/aic.690260135