| 摘要 |
<p>PURPOSE:To make the throughput from an extrusion head constant, by providing a pressure gauge near a branching point communicating from a connecting pipe between a vented extruder and an extrusion head to a polymer discharge means and controlling the amount to be discharged from the polymer discharging means according to the pressure. CONSTITUTION:An extrusion apparatus of a molten resin for feeding a melt of a mixture of a polymer with a monomer after continuous polymerization or a polymer melt, containing a small amount of a solvent and obtained by desolvating a polymer solution to a vented extruder 3, discharging the monomer or solvent from vent holes 4 and extruding the polymer from the connecting pipe 5 through a metering pump 7 and extrusion head 12. A branching passage 6 is provided in the course of the connecting pipe 5 to connect to the polymer discharging means 8 and a pressure sensor 9 is provided near a branching point 13. When the pressure sensor 9 detects that variation in extrusion through the extruder 3 becomes >=3%, the pressure in the connecting pipe 5, i.e. back pressure of the extrusion head 12, is kept constant by the polymer discharging means 8.</p> |
