METHOD FOR CONFORMING PRODUCTS MADE OF HDPE OR PA, AND DEVICE FOR PERFORMING THE METHOD OF CONFORMING PRODUCTS MADE OF HDPE OR PA

摘要

the invention relates to a method for shaping products made of hdpe or pa, particularly for the spatial shaping of hdpe or pa tubes, in which a semi-finished product of hdpe or pa is shaped. a semi-finished product from hdpe or pa is first heated to a temperature t close to the melting temperature tg of the material, so that the material remains in a solid state, the semi-finished product from hdpe or pa is left at this temperature for the required period of time t1 to obtain plasticity and to completely or partially disrupt the crystalline or semi-crystalline structure of the hdpe or pa material and to relax the internal tension of the hdpe or pa material and to restore the amorphous or partially amorphous state of the material, after which the semi-finished product hdpe or pa is inserted into a forming part and the temperature of the hdpe or pa material gradually decreases to room temperature. the invention also relates to a device for carrying out the method.