| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make an extrusion molding apparatus compact to reduce its occupancy space. <P>SOLUTION: The extrusion molding apparatus for multiplex pipe comprises: a plurality of screw type excluders 6 to 8 thermally melting resins 3 to 5 and extruding them; a die 15 allowing the respective resins 3 to 5 extruded from the respective excluders 6 to 8 to pass forward and molding a multiplex pipe 2; and positive displacement pumps 28 to 30 interposed between the respective excluders 6 to 8 and the die 15, into which the respective resins 3 to 5 extruded from the respective excluders 6 to 8 are introduced, and on the other hand, which discharge the respective resins 3 to 5, so as to be fed to the die 15. The respective pumps 28 to 30 are centralizedly arranged in the vicinity of the outer direction of any one face among the left and right sides 31, 32 and upper and lower sides 33, 34 of the die 15. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
