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Eco-Friendly 3D Printing Using an Ecostruder, Recycled E-Waste and Solar Power https://ift.tt/2LavuAw Electronic devices are a part of daily life for people across the world – laptops, smart phones, tablets, fitness bands, etc. They’re wonderful to have for many reasons, but none of these devices last forever, and when they’re discarded, they can do serious harm to the environment. Recycling programs are springing up that can refurbish and reuse some of the electronics in the devices, but what about all the plastic that left over? In a paper entitled “The Recycling of E-Waste ABS plastics by melt extrusion and 3D printing using solar powered devices as a transformative tool for humanitarian aid,” a group of researchers discusses how they took ABS plastics found in electronic waste and recycled them using 3D printing. The researchers used waste plastics from discarded electronic devices within Deakin University‘s School of Engineering. These plastics included the outer casing from devices such as old computers, laptop docking stations and desktop telephones. They cleaned the plastic if needed and then broke it down into fragments and fed it into a hand operated granulation device, which was composed of a series of geared, interlocking teeth that could be rotated using a lever arm. The plastic underwent several phases of repeated grinding, after which it was put through a mesh sieve. The researchers then created their own melt extrusion device, which they named the Ecostruder. The system uses a single screw system and is powered by an internally geared DC motor.
Once the filament was generated by the Ecostruder, it was 3D printed using a LulzBot Mini. To make the entire process even more eco-friendly, the researchers used a nanogrid system powered by solar energy, via portable photovoltaic (PV) panels.
Tests were performed on the nanogrid system to evaluate its charge generation efficiency. Test 1 was performed on a cloudy day, and Test 2 on a sunny day. The average sustained power output was approximately 14W for test 1 and 210W for test 2. Future modifications of the system may include building larger banks of batteries to store excess charge during times of peak generation, for use on days when power generation is suboptimal. To test the 3D printing performance of the system, the researchers took it to a location with clear exposure to the sun and 3D printed three different parts: a 20x20x20mm cube, a 30mm diameter and 30mm height cylinder and a lattice structure with a cube of 30x30x30mm. The test was completed in approximately 90 minutes, and the solar panels not only adequately powered the 3D printer but held an excess of energy.
Tests were also performed to evaluate the quality of the 3D printed recycled material. To do this, the researchers 3D printed a pipe connector. There were a few cosmetic surface defects, but the part was robust. The researchers used the printed part to join a section of piping, and tested it by blocking the end of one piece of tubing, pressurizing the system using a plumbing pressure testing device. The part held the water with no leakage up to a pressure of 5Bar. The results show that the recycled ABS can be used to 3D print functional parts. Future studies aim to test the system in field conditions to assess its potential for humanitarian aid. Authors of the paper include Mazher Iqbal Mohammed, Daniel Wilson, Eli Gomez-Kervin, Callum Vidler, Lucas Rosson and Johannes Long. Discuss this and other 3D printing topics at 3DPrintBoard.com or share your thoughts below.
Printing via 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing https://3dprint.com December 10, 2018 at 10:03AM
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