| 摘要 |
A thermally insulated extrusion die plate assembly for a pelletizer includes a plurality of extrusion orifices (22) through which process melt is extruded to exit at a cutting face as a strand to be cut into pellets by a moving cutting assembly, said die plate assembly including a die plate body (36) and a cover plate (38), and a thin continuous air chamber (32) being formed between a downstream side of said die plate body and the upstream side of the cover plate, the improvement comprising a raised circular ridge (34) formed on the downstream face of the die plate body with orifice protrusions (35) positioned on top of the ridge, the ridge and the protrusions together defining extrusion orifice extensions (31) through which said extrusion orifices (22) extend from the die plate body to openings in the cover plate at the cutting face, said air chamber (32) configured to surround said raised circular ridge and associated orifice protrusions in order to maintain the process melt at a desired temperature in the extrusion orifices at the cutting face (Fig. 2). |
