| 摘要 |
<p>The invention relates to a method for reclaiming scrap or old articles of plastic, in particular of polyurethane or polyurea, performing the following method steps: a) as raw material, the scrap or old articles are reduced in size, for example to form shreds or granules, the size of the reduced raw material being </= 5 mm, in particular </= 3 mm; b) the reduced raw material is preheated; c) the reduced and preheated raw material is introduced into the article mould at a stuffing rate of 0.03 to 0.5 m/sec under the effect of temperatures between 170 and 240 DEG C and pressures of > 300 bar, in particular 500 bar. In the case of a device (1) for performing this method, the mould upper part (2) has a charging opening (5) for the reduced and preheated raw material, which opening opens out into at least one cylindrical ram chamber (6), the ram chamber, as prechamber to the mould cavity (4), receiving the raw material, which is pressed by means of a ram (8) into the mould cavity (4). In the case of a further variant of the device, mould upper part and mould lower part are equipped with vertical flash faces. <IMAGE></p> |
