The invention relates to a one-step method for producing molded bodies (1) of various shapes from thermoplastic material with or without reinforcing fibers. For this purpose, a tool having a lower and an upper shell mold (10a, 10b) forming defined surfaces on both sides is used. The shell molds have thin walls, are produced from metal and have a centered portion on both shell molds, a displacement transducing, air-tight edge sealing (16) and tempering means (13) for the controlled heating and cooling on both shell molds. For producing the molded body, the thermoplastic material (2) is inserted in the shell molds together with reinforcing fibers (3) in a locally defined manner, the shell molds are evacuated (p1) and compressed (ds), heated above the melting point and maintained at a temperate (Ts) until the thermoplastic material consolidates and melts under a pressure (dp) until it melts to such a point that it fills the contours. The structure is then cooled down under pressure in a defined manner until the inserted material has completely solidified. The inexpensive and automatable method allows to produce molded bodies having pore-free visible surfaces on both sides using various materials, designs and shapes. |