| 摘要 |
Once granules of plastic have been filled into the inlet funnel from a raw materials tank, they are heated to dough-like consistency. In accordance with the stage of the injection cycle, a defined quantity is transferred into the injection cylinder and the flow is interrupted. The plastic is then injected through the nozzle into the mold. An Independent claim is included for the injection molding unit carrying out the process. A special chamber (41) is included between supply funnel (31) and cylinder (11), where the microwaves are coupled-in. Preferred features: Heating is effected by microwaves, to the injection temperature or slightly below it. The temperature of the plastic is controlled, variation in dielectric constant being taken as its measure. Additives in the plastic, escape from the melt during microwaving. Water is added, occupying 1-10% of the total volume.
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