جستجوی مقالات مرتبط با کلیدواژه « اکسترودر » در نشریات گروه « مکانیک »

The accumulation of polymer waste in the environment is a threat to human life and other organisms on Earth. And it causes the necessity of recycling them. In this paper, a co-rotating twin-screw extruder was used to devulcanize the NR/SBR rubber compound. Then, the residence time was examined based on the different screw configurations and various angles of the kneading blocks. For this purpose, kneading elements were designed with different angles and set in the extruder. In the following, considering the extruder as a continuous reactor, equations and models for residence time and other parameters were defined. by studying solid and liquid (melt) models; It was found that the residence time is only affected by the spiral arrangement in the liquid part. This research aims to finding the optimal arrangement and angles to reduce the residence time, which improves quality and reduces energy consumption.

Nowadays using 3D printing for prototyping is well known in industrial applications and there are efforts to make functional parts with this technology to reach low volume production markets. By using pellets rather than filaments, the limitations caused by lack of variety of materials can be conquered. Also there will be no need to make a massive part as several divided parts and then glue them together.In this article pellets of ABS, that are well known and functional in industry, are analysed for an extruder to investigate the ability of pellet material extruding. Characteristic specifications of extruder such as operating pressure, screw rotational speed and required torque for rotating the screw are achieved for they are important factors to find out the mechanism for experimental tests and selecting suitable operating parts such as motor and gearbox. At the end, the experimental tests on designed system are done and the result approved the trends of theoretical data.

Nowadays using 3D printing for prototyping is well known in industrial applications and there are efforts to make functional parts with this technology to reach low volume production markets. By using pellets rather than filaments, the limitations caused by lack of variety of materials can be conquered. Also there will be no need to make a massive part as several divided parts and then glue them together. In this article pellets of ABS, that are well known and functional in industry, are analysed for an extruder to investigate the ability of pellet material extruding. Characteristic specifications of extruder such as operating pressure, screw rotational speed and required torque for rotating the screw are achieved for they are important factors to find out the mechanism for experimental tests and selecting suitable operating parts such as motor and gearbox.