| 摘要 |
<p>A thermo-hardenable mouldable material, having a visco-elasticity particularly consistent, is transformed by an extrusion process into a plastic material; the mouldable material necessary to provide an amount of extruded product is divided at least into two loads and is introduced at the same time through at least two sides of the filling space (3) of the extrusion press. Both loads get together in the filling space (3) and are pushed ahead by the piston (1) of the extrusion press, into the spinning nozzle (6) wherein is connected the extruded product which has been formed during the preceding run; preferably, this is achieved by compressing perpendicularly to the thrust direction. According to the hardening degree, the spinning nozzle (6) may be heated or cooled, so that an amount of compact extruded product (9) come out of the spinning nozzle (6). The partition of the mouldable material into different loads allows the production of plastic materials having any complex transversal profile and in particular a hollow profile. For producing hollow profiles, the filling space (3) of the extrusion press is provided with at least one core (8). The partial loads are introduced into the filling space (3) by distribution ducts (10); they are compressed or injected by an auxiliary piston (4) or a worm screw piston or similar.</p> |
