BRNO UNIVERSITY OF TECHNOLOGY
Antonínská 548/1, 601 90 Brno
Czech Republic
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BUT starts with the production of protective shields on the injection moulding machine, it produces up to two thousand of them every day
3D printers producing shielding components will replace BUT's faster injection moulding technology. This will make it possible to increase the daily production up to two thousand pieces and equip more of those who work in the first line. Technicians thus respond to the high demand, especially from the medical staff. However, other interested parties can also apply for shields.
In recent weeks, most faculties of BUT and also CEITEC BUT have joined 3D printing. It serves as a logistics place where printed parts and finished protective shields manufactured in the neighbouring FabLab digital workshop are collected. In recent days, however, volunteers have begun to struggle with a lack of material. Therefore, BUT researchers began to look for other and faster production options. In cooperation with the Brno company ACAM Solution, they produced a mould for an injection moulding machine, which will speed up the production of shields many times over.
“The shield consists of four parts, which are the headband, chin, plexiglass shield and rubber band. We add instructions to all this and of course, we disinfect the shields. Thanks to the injection moulding machine, we will increase production from two hundred up to about two thousand pieces a day. In addition, the shields will be mechanically and chemically more resistant," Luděk Žalud from CEITEC BUT, who sponsors the production, said.
The Faculty of Chemistry involved several laboratories for cooperation. In the polymer processing laboratory, manufactures polypropylene headbands are manufactured on an injection moulding machine, on which a plexiglass face cover and a head strap are attached. In this step, a second fixed part is produced at the same time, namely the reinforcement of the underside of the shield. Both fixed parts made on the injection moulding machine together with a transparent shield, strap and printed instructions are stored in prepared bags. "In order to be able to supply really high-quality
protective products, the sterilization process follows. A small amount of ozone is introduced into the bags under safe working conditions in the laboratory to disinfect all the contents. The bag is then thermally sealed. A small amount of ozone will gradually decompose in the bag within a few hours and ensure complete sterilization,” Tomáš Opravil from the Faculty of Chemistry, BUT said. The effectiveness of this sterilization is also tested at FCH by experts in microbiology.
The Faculty of Electrical Engineering and Communication Technology bought several kilometres of rubber bands and the Faculty of Mechanical Engineering offered students help at the machines. The nearby Technical Museum is also involved, where cut plexiglass for shields is cleaned and subsequently delivered to the Faculty of Chemistry. A number of commercial partners and workplaces have also joined.
"CEITEC coordinates the whole process and provided funding for its launch. The shields are distributed free of charge with the help of the City Municipality of Brno. We expect the production of about fifty thousand shields with this technology or even more if needed,” Jan Nedvěd, CEITEC BUT Secretary said.
The whole cooperation began about two weeks ago when FabLab Brno embarked on the production of shields on the initiative of 3D printing against COVID-19 and became the headquarters for Brno and South Moravia. It took a few days before the actual production to stock enough material. Thanks to the involvement of 83 printers who provided their more than 130 3D printers, the daily production capacity for Brno and South Moravian Region was approximately six hundred units. 21 volunteers helped with the assembly, and other volunteers, mainly from the South Moravian Innovation Centre (JIC - #business makes sense), took care of their meals. Other 10 in the role of couriers will deliver the finished shields where needed. “In times of acute lack of protective shields, 3D printers played an irreplaceable role thanks to the possibility of rapid prototyping and editing. Thanks to the injection moulding machine, however, production will be much faster and therefore we will slowly drop out of printing on 3D printers. At FabLab, however, we will continue to help by cutting plexiglass into shields,” Tomáš Mejzlík, a BUT graduate who coordinates the production at FabLab, explains.
Those interested in protective shields from Brno and South Moravian Region can apply via the form: https://wiki.fablabbrno.cz/covid19/čelní-štíty.
Published: 2020-04-23
Short URL: https://www.vut.cz/en/old/f19527/d198138
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