Study of the parameters of cardboard blanks’ stack lifting devices in the printing equipment

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Topolnytskyi P. V., Kolomiiets A. B., Shustykevych A. I. № 2 (65) 104-111 Image Image

An inspection and analysis of the existing devices for lifting the slipway table, loaded with a stack of cardboard sheet blanks as part of the printing and post-printing equipment, is carried out. Disadvantages are found in their work, which are caused by discrete movement, which affects the accuracy of positioning the workpieces and can have a negative effect on the dynamic characteristics of the machines.

The design of the device for lifting a loaded slipway table, which provides it with stepless movement, is developed. Therefore, it is proposed to use the frequency controller of the speed of rotation of the motor shaft to control the operation of the drive’s engine of the slipway table lifting mechanism. This is important in the case of simultaneous lifting of the table and changing the speed of the printing press or stamping press. It is also necessary to achieve the effect when using a wide range of printing materials – from paper to corrugated cardboard.

The converter is selected according to the equipment characteristics. The selected device can perform high-quality work with a power from 0.1 to 4 kW. It meets the needs of most known printing and post-press equipment, where a need to lift a stack of paperboard sheet blanks exists.

Analytical dependencies are derived, on the basis of which calculations of kinematic and power parameters of the device ae carried out. It has been proven that the drive power of the slipway table’s movement device is directly dependent on the physical and geometric properties of the cardboard used during printing or die-cutting.

The results of the study determined the nature and magnitude of the influence of the mentioned parameters of the printing equipment and the cardboard blanks on the kinematics and power characteristics of lifting the loaded slipway table. The studies are useful for designing new or upgrading existing equipment.

Keywords: printing machines, die-cutting presses, slipway table, cardboard, stack, frequency regulator, lift, engine, speed, power, thickness.

doi: 10.32403/1998-6912-2022-2-65-104-111


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