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Extrudex originally developed this new concept at the request of Soplar of Switzerland, and Soplar wanted to provide small but high-yield equipment. In recent years, Extrudex has successively delivered more than 50 Helibar devices to customers, mainly for blow molding and pipe extrusion. The company is in the process of signing a contract with only a few suppliers in Europe as the sole supplier and preparing to transfer technology patents.
Germany has developed new extrusion machinery suitable for TPU and others
The University of Paderborm, Germany, has developed a new extruder design concept. It has been used by German Extrudex Plastics Machinery Co., Ltd. for the industrial production of single-screw extruder Helibar for extrusion pipe and blow molding (hollow forming). Helibar's length-to-diameter ratio is 36/1, characterized by a threaded groove in the entire length of the barrel, a deep groove in the feeding section, and a shallow groove in other parts. The screw has a special barrier structure and the rotational speed is higher than that of the single screw. Machine, the output is particularly large. The output of Helibar with a screw diameter of 70 mm can reach 450 kg/h, while that of a smooth cylinder with the same diameter yields 227 kg/h. The Helibar output with a screw diameter of 70 mm and a length/diameter ratio of 36/1 corresponds to a general extruder with a diameter of 90 mm and an aspect ratio of 30/1. Extrudex is available in 50mm and 70mm (diameter) models. Suitable processing resins are: HDPE, LLDPE, LDPE, PP, acryloyl ester, PET, PC, PA6, soft PVC, EVA, TPU (thermoplastic polyurethane) and other TPE (thermoplastic elastomer).