Використання двокамерного пневматичного модуля для прорізування контурів у картонних розгортках

Abstract

The scientific work is devoted to the research of a new device for die-cutting contours in cardboard scans. The aim is to create a method and device for frost-free contouring in cardboard. Introduce the technology of contactless die-cutting. That is, cutting without supporting contact elements such as: counterplate, cheek, counter knife, etc. To perform the technological process of cutting, a separate two-chamber pneumatic module of the device for cutting contours in cardboard scans is proposed. A countertop with contour grooves in the work area is used as a counter knife to create resistance with compressed air. After passing the area of action of the tool unit on the contours of the cardboard scan, slits are formed, which contribute to their quality further bending and the formation of three-dimensional structural elements of cardboard packaging. Die-cutting of contours and preparation of a cardboard scan for further technological processes occurs in one kinematic cycle of the tool unit without the use of support elements. For analytical research, the two-chamber pneumatic module is divided into three conditional technological zones. The first zone corresponds to the upper pneumatic chamber, the second — the lower and the third refers to the working area of the piston. The pressure at the beginning of the piston stroke is the smallest and increases as it moves to the maximum upper coordinate. Accordingly, the pressure force is corrected in proportion to the increase in piston stroke. Since the resistance of the compressed air generated in the grooves of the desktop of the upper pneumatic chamber must be equivalent to the die-cutting force, it must also be adjusted to the specified calculated values. Creation of resistance by compressed air will allow carrying out cheek-free cutting of contours in a cardboard scan. The mechanics of the technological process of cutting contours helps to reduce the complexity of manufacturing a semi-finished product without the involvement of additional supporting elements like counter knives and cheeks. And as a conclusion — to reduce the required total power consumption of the drive and eliminate the phenomenon of accelerated blunting of cutting knives.

Keywords

• cardboard scan
• cutting knife
• ejector cushion
• compressed air
• perforation groove
• pneumatic chamber