| 摘要 |
An apparatus for preheating and dosing plastic which is to be fed to an extruder consists of a housing 3 with a heatable casing and a double worm screw (1,2) mounted at both ends in the housing 3 and turning oppositely. The two worm screws (1,2) of the double worm screw are hollow, such that the hollow cavity (8) serves to accept a heating medium, for example hot water, for the purpose of heating the worm screws (1,2). The apparatus allows the working material to be uniformly heated, and precisely metered to the extruder. (Fig. 2). |
