| 摘要 |
PURPOSE:To form a molding with the predetermined length and a joint alternatively continuously by changing a changeover shutter in a predetermined cycle into a molding extruding position and a joint extruding position. CONSTITUTION:When a changeover shutter 11 is disposed at a molding extruding position, a molding raw material 21 sent to a first flow conduit 2 flows into a molding flow conduit 4 via the communicating hole 13 of the changeover shutter 11, and thereafter becomes a molding 24 with a predetermined cross-sectional shape. As the communicating hole 13 of the changeover shutter 11 is closed and the changeover shutter 11 is positioned at a joint extruding position, a joint raw material 22 sent to a second flow conduit 9 flows into a molding flow conduit 4 via the communicating part 14 of a changeover shutter 3. The joint raw material 22 joints to the end surface of the molding 24 in a molding flow conduit 4 and becomes a continuous joint 26 having a cross-sectional shape identical to the cross-sectional shape of the molding 24. The molding raw material 21 sent to the first flow conduit 2 flows to a discharge conduit 7 via the discharge recession 15 of the changeover shutter 11 and then discharged from a first discharge port 8. |
