| 簡(jiǎn) 介： |
of pipe of thermoplastic engineering plastic with excellent comprehensive
performance, but the difficulty in molding is a technical bottleneck which has
already affected the extensive application of pipe of pure UHMW-PE. Molding in
barrel on the Single screw extruder is a new technology of extrusion molding
method, which can continuously carry out pipe of pure UHMW-PE, the most
significant advantages of the technology are as follows: under the circumstances of
no need to feed any additives in the whole forming process, it can continuously
carry out pipe of pure UHMW-PE, and the extrusion molding speed of it is up to 12
m/h above. During the process of it based on molding in barrel technology, one of
the main factors influencing to whether UHMW-PE pipe can be successfully
molded or not is whether the melting process of raw material is adequate and
appropriate or not. This article will elaborate melting characteristics of raw material
of UHMW-PE, establishment of mathematical model of melting process, and
numerical simulation of melting process, which belong to the forming process of
molding in barrel, and will provide a theoretical basis for correctly designing the
structure of single screw extruder and temperature control system of single-screw
extruder, based on Molding in Barrel Technology. |
