Impact assessment of the uniformity mixing recycled and virgin polymers on the technical extrusion blow molding efficiency

Extrusion blow molding of technical products (EBM-TP) is a significant technological polymer manufacturing process ex. for the automotive branch. Implementation of the extrusion blow molding process in an operating arrangement of polymer technology is a component of many technological factors, but also of factors related to feedstock material. The products can be manufacturing with the participation of plastics recyclate. The homogeneity of the recyclate-virgin polymer mixture strongly influences the distribution of spreading the wall thickness of the final products. For this type product wall thickness distribution should be uniform and very close to each other or determined in a specific range of values. Work presents the mixture influence (HDPE recyclate-virgin polymer,) with different characteristics of mixing degree defined as homogeneous and heterogeneous, on the part features (the intake manifold airflow in a motor vehicle) with respect to the weight of the weight and wall thickness in reference required by the customer of the product. Mixtures of HDPE were prepared via a specialized gravimetric mixer, which is directly connected to the feed circuit extruder blow molding. They began to manufacture defined types of test specimen (actual Products of) and their evaluation according to criteria adopted burden of weight and wall thickness.