| 摘要 |
<p>PURPOSE:To jet cooling water which is always maintained at a fixed temperature when an extrusion-molded article is manufactured by jet-cooling the molded body which is extruded from an extrusion die while circulating a fixed quantity of the cooling water. CONSTITUTION:When an extrusion-molded article is manufactured by draining one part of a cooling water, and at the same time, the equal quantity of water is fed, and circulating always a fixed quantity of water, and jetting the cooling water to an extrusion-molded body 3 to cool it, the water is drained from a water drain pipe 58 by controlling the opening/closing of a solenoid valve 581 in response to a value of the cooling water temperature which is measured by a sensor 542. The water level of a cooling water tank 53 is measured by a sensor 531, and the equal quantity of the cooling water which is drained is replenished from a replenishing pipe by opening a solenoid valve 571.</p> |
