| 摘要 |
PURPOSE:To freely alter the shape of an embedded resin layer during the production of a thermoplastic resin sheet and to eliminate the thickness deviation of the embedded resin layer in an apparatus subjecting two kinds of thermoplastic resin to extrusion molding to produce the thermoplastic resin sheet wherein one resin layer is embedded in the other resin layer. CONSTITUTION:A conduit 2 capable of supplying a second thermoplastic resin (b) is arranged in the manifold of an extrusion mold 1 receiving the supply of a first thermoplastic resin (a). A slit part 9 allowing the second thermoplastic resin to flow out to introduce the same into the manifold 3 is formed to the conduit 2 and the opening width of the slit part 9 is changed by moving the conduit 2 in its axial direction. At this time, the unnecessary opening part of the slit part 9 is closed by the closure outer pipe 7 externally fitted to the conduit 2. |
