Process and installation for the continuous filling of two-part closed casting moulds with plasticized plastic, in particular with recycled plastic containing a high level of impurities

摘要

The casting moulds (1), comprising an upper mould part (2) and lower mould part (3), for producing articles with a highly profiled surface are fitted at equal distances around the circumference of an intermittently driven rotor (4). The process sequences, such as the locking, tightening and unlocking, and also the opening and closing of the casting mould (1), take place in the course of movement of the rotor (4), in that the linkages (7, 12) engage in stationary cam plates (5). The opening and closing of the casting moulds (1) is performed by toggle joints (6), arranged on both sides of the latter. For larger casting moulds (1), the upper mould part (2) can also be served by means of a gripper (17), actuated by a hydraulic cylinder (18). The melt discharged by an extruder (27) passes via a distributor head (28) into preferably two pressure apportioning accumulators (25), which are controlled in such a way that one stores and apportions the melt, while the other fills the casting mould (1). A water bath is arranged for cooling the casting mould (1). Emptying of the casting mould (1), and also filling of the same and the insertion of any reinforcement (26) take place during the standstill period of the rotor (4). <IMAGE>