| 摘要 |
<p>Die assemblies and extension methods for causing extrudate to bend without substantially changing its cross-sectional shape. Extrudate passes from an extruder down a feed channel (19) opening into a divergent flow channel (21) to the front die opening (32). Means are provided, e.g. by having feed channel (19) and flow channel (21) defined in separate, relatively rotatable parts (16,13)), for varying the relative lengths of flow pathway, from the feed opening (20) to opposing sides of the die opening (32), sufficiently to cause controlled bending of extrudate.</p> |
