| Abstract [eng] |
The Master degree project examines the existing options of cutting systems in cardboard tubes machines and introduces a special device – the cutting mechanism that is used that for cutting cardboard tubes. In this case circular saw blade and “target” (a plate) is used. The disc is connected with the target. When the cardboard core is formed, it pushes the target and the circular saw blade cuts the core. By pushing the target the inductive sensor transmit the signal to the pneumatic cylinder which moves the circular cutting disc and cuts the cardboard tube. The cutting disc moves along the cardboard tube movement, so it is important to synchronize the disc speed with core linear speed. Such a cutting unit slows down the core manufacturing speed and reduces the final product quality. Also, this machine creates a lot of noise and dusts in the workplace, and thus, worsens the working conditions. Because of jagged and uneven cut tube edges, the tube cannot be used for further processing operations and is thrown away. The analysis of the original cutting mechanism is conducted in this project, modernize cutting unit is created, because of poor cutting quality, high waste of material, equipment and labour force of original cutting unit. The cutting quality and noise analyses of cutting unit are performed and compared with the data of modernized cutter. In the economic part of this project the costs for producing an interconnection unit are calculated. |
