| 摘要 |
This invention provides an apparatus for simultaneously producing, from a single source of homogenized plastics material, at least one product in which the plastics material is modified by the injection of an additive. The apparatus includes a mechanism, such as a screw extruder, for homogenizing the plastics material and a mechanism for dividing the stream of plastics material into at least two separate streams into one of which at least is injected an additive. The injection mechanism includes at least one hollow probe which terminates in the stream of plastics material to be modified and a dispersing mechanism for the additive, for example a gear pump, is provided. The streams of plastics material, modified and unmodified are then fed to a final product forming device, such as a die, in such manner that the streams can be individually extruded, or some at least of the streams can be combined in a die to produce an end product. |
