A process for the preparation of a leaf spring from a fiber composite material with a thermoplastic, as well as produced in the leaf spring

摘要

A process for the preparation of a leaf spring from a fiber composite material,the fiber composite material made of a thermoplastic material (8) and unidirectionally oriented fibers (9), and in which the thermoplastic (8) in the form of foils (8a) is used, with the following method steps:a) producing a fiber - thermoplastic - strand (10) by an alternate arrangement of fibers (9) and thermoplastic films (8a), wherein the in a unit of length of the fiber - thermoplastic - strand (10) volume of the thermoplastic (8) is greater than the volume of all intermediate spaces (16) between the fibers (9), and wherein said in a unit of length of the fiber - thermoplastic - strand (10) volume of the thermoplastic (8) in addition, it is sufficient in order to allow all the outer surfaces of the in the roh - leaf spring (15) arranged at the outer side of fibers (9) to completely cover,b) introducing the fiber - thermoplastic - strand (10) or a plurality of fiber - thermoplastic - strands (10) of predetermined length in a molding press,c) applying a predetermined force, as well as a predetermined first temperature to the at least one fiber - thermoplastic - strand (10) in the molding press in such a way that the thermoplastic material (8) melts and this all of the intermediate spaces (16) between the fibers (9) is filled up, as well as the fibers (9) against the outer surface of the thus hergesteliten roh - leaf spring (15) completely covers,d) forming the roh - leaf spring (15) from the molding press and cooling of the same to a second temperature (t2), ande) final machining of the raw - leaf spring (15).