| 摘要 |
<p>An apparatus for manufacturing thermoplastic resin foam pellets is disclosed. This apparatus continuously produces desired thermoplastic resin foam pellets from a high viscosity thermoplastic resin in commercial quantity. The apparatus includes a hollow cylindrical die (11) having a plurality of radial extrusion ports (23) at its outlet end portion. A torpedo (17) is axially set within the die (11) to form a resin passage within the die. In an embodiment, the cutting means consists of motor-driven steel wires (30) spirally extending along the rounded external surface of the die (11) at a position around the radial extrusion ports (23) while coming into close contact with the rounded external surface of the die. In another embodiment, the cutting means consists of motor-driven movable rods (5) axially arranged inside the die (1) to be axially reciprocable along the die, with a plurality of pairs of holes (6a, 6b) being formed on each of the movable rods (5) so that they each alternately communicate with one of two neighboring radial extrusion ports (4) in accordance with an axial reciprocating action of each movable rod (5).</p> |
