| 摘要 |
The extruder for processing plastics materials is equipped with an apparatus for material feeding, which is arranged upstream of a barrel (1) which has a die (2) at the discharge end. A feed mechanism (4) is provided for each type of raw material which is fed to the screw (3), the said feed mechanisms being connected to one another in vertical planes (5) by flanges (6) and bolts (7). The feed mechanisms have a housing (9), in which there is provided a pair of rolls (8), which are mounted rotatably about horizontal axes, can be driven and define a feed gap for the respective raw material. The rolls are driven by means of a variable-speed drive, the speed being controlled as a function of the material pressure, which is measured at the point (11), and as a function of the material consumption in the material hopper which is assigned to each feed mechanism. The screw (3) extends over the entire length of the barrel (1) and of the feed mechanisms (4) and is received in the region of the feed mechanisms by a central bore of the parts (10). <IMAGE>
|
