| 摘要 |
<PICT:0860876/IV (a)/1> <PICT:0860876/IV (a)/2> An extrusion machine comprises a housing 1, with heating and cooling means 8, 11 and a number of screws 2, each screw in its own cylinder and projecting from its cylinder into a chamber 6 common to all screws, the projecting portions of the screws being enlarged so that they "mesh." The outlet of the chamber 6 is constructed as a slit nozzle or an annular nozzle, and in the latter case the screws may be circularly disposed (Fig. 4, not shown). |
