Sheet Feeding Control for Corrugated Box Making
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In corrugated paperboard box making machines, the shortened time intervals between sheet feeding operations lead to inaccurate positioning of the main ledge, causing collisions and jam-ups, resulting in incomplete separation of box-structured corrugated paperboard sheets as batches.
Innovation Solution
A corrugated paperboard box making machine with a sheet feeding control apparatus that sets feeding control modes to control the sheet feeding operation, allowing for repeated feeding operations during a processing cycle, and includes a control apparatus to stop the sheet feeding operation at specific times to ensure accurate separation of box-structured sheets, even when feeding multiple sheets during a 360-degree rotation of the processing rotator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sheet feeding operation is performed multiple times during a processing cycle to increase productivity, then the productivity increases, but the main ledge positioning accuracy deteriorates causing collisions and jam-ups
Solution Approach 1:
The patent implements periodic stopping of the sheet feeding operation at specific intervals during the processing cycle. The control apparatus is configured to stop the sheet feeding operation at least once after executing the sheet feeding control processing when multiple sheets are fed during one processing cycle. This periodic interruption allows the main ledge to accurately position itself between batches of sheets, preventing collisions while maintaining high productivity through multiple feeding operations per cycle.
2Loss of time
If the sheet feeding speed is increased to reduce processing time, then the processing time decreases, but the separation accuracy of box-structured sheets deteriorates
Solution Approach 1:
The control apparatus performs preliminary positioning of the main ledge before the sheet feeding operation begins. By pre-positioning the main ledge at the appropriate location before high-speed feeding starts, the system ensures that even though sheets are fed rapidly, the main ledge is already in the correct position to receive and separate batches accurately, thus maintaining separation accuracy despite increased feeding speed.
Solution Approach 2:
The system incorporates periodic stopping points during the high-speed feeding process. At these predetermined intervals, the sheet feeding operation is temporarily halted to allow the main ledge to reset and position itself accurately for the next batch separation, ensuring that rapid feeding does not compromise the precision of batch formation.
Data Source
AI summary
Disclosed is a corrugated paperboard box making machine which comprises a feeding control mode setting unit for setting a feeding control mode to one of a first feeding control mode for controlling a sheet feeding apparatus and a second feeding control mode for controlling the sheet feeding apparatus such that the sheet feeding operation is performed plural times during the period of time in which the printing rotor is rotated 360 degrees, and a control apparatus for controlling the sheet feeding apparatus according to the set feeding control mode. The control apparatus is operable to execute a sheet feeding stop control processing of, when the second feeding control mode is set, controlling the sheet feeding apparatus such that the sheet feeding operation is stopped at least once after execution of the sheet feeding control processing.