| 摘要 |
This publication describes a ram casting machine (1. . .6) for the fabrication of concrete slabs, movable on a casting bed (7) and incorporating a feed hopper (2) or similar unit, and members (3), for generating internal pressure in the cast concrete (8). The extruder in accordance with the invention comprises at least one ram member (3), cyclically moving in the cast direction, with at least one wedge-shaped surface assembly (32, 33; 34, 35), approximating a V-shape by its longitudinal section, so that in the concrete entrance direction the first surface (32, 34) is essentially steeper towards the casting direction than the other surface (33; 35). |
