JOINTLESS SHORT PIPE CONTINUOUSLY FEEDING METHOD AND SHORT PIPE CONTINUOUSLY COATING DEVICE

摘要

PURPOSE:To omit a short pipe joining process to shorten a setup time by a method wherein a short pipe fed frontward of a crosshead of an extruder is introduced without a shift from the center line of the extruder. CONSTITUTION:A short pipe positioning guide 6 is provided with a positioning funnel-form hole 6a at the center thereof and a short pipe insertion hole 6b having approximately the same outer diameter of a short pipe. A short pipe fed from leftward is so guided by the funnel-form hole 6a as to be invariantly directed to the center line thereof and positionally regulated by the hole 6b to be delivered. The short pipe positioning guides 6 are placed on the right and left sides of a short pipe feeder 7 at an interval. shorter than the effective length of the short pipe so that the center lines thereof coincide with each other. Short pipes 2, 2'... are fed into an extruder crosshead 9 in a short pipe feed direction so that the center thereof are kept on the center line of the extruder.