Corrugated Paperboard Printer Chamber Frame Bending Control
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Solution Overview
Problem
Flexo printers for corrugated paperboard sheets face issues with uneven ink transfer due to bending of printer components, leading to printing inaccuracies and the need for frequent maintenance of switching valves and ink carrier pipes.
Innovation Solution
A corrugated paperboard printer design featuring a chamber frame with a steel member extending across the anilox roll, maintaining the ink carrier pipe on the opposite side, and incorporating maintenance openings and insertion parts to ensure efficient maintenance and reduce bending, while a pressing device adjusts the pressing force to stabilize the chamber frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the printer width is increased to accommodate larger corrugated paperboard sheets, then the printing capacity is improved, but the printer members such as the anilox roll and chamber frame are subjected to large loads causing bending vibration and uneven ink transfer
Solution Approach 1:
The patent introduces a new spatial dimension by positioning the ink carrier pipe on the opposite side of the anilox roll across the chamber frame, rather than on the back surface. This dimensional relocation allows the pipe to be supported by the chamber frame structure without causing bending moments, thereby maintaining printing accuracy while accommodating the increased printer width for larger paperboard sheets
Solution Approach 2:
The patent replaces the traditional switching valve mechanism with a slide valve that moves linearly along the ink carrier pipe. This substitution eliminates the repetitive rotational switching action that caused sealing member deterioration, while maintaining the flow rate switching function needed for ink supply control in the enlarged printer configuration
2Ease of operation
If the switching valve is provided on the back surface of the chamber frame for ink supply, then the ink flow control is achieved, but the sealing member deteriorates due to repetitive switching action requiring frequent replacement
Solution Approach 1:
The patent transforms the static switching valve into a dynamic slide valve that moves linearly along the ink carrier pipe. This dynamic mechanism allows the valve to switch between open and closed positions without repetitive rotational action, significantly reducing wear on sealing members and extending the reliability of the ink flow control system in the enlarged printer
3Adaptability or versatility
If the ink carrier pipe is installed on the back surface of the chamber frame, then the ink supply function is provided, but the chamber frame bends under load affecting printing accuracy
Solution Approach 1:
The patent relocates the ink carrier pipe from the back surface of the chamber frame to the opposite side of the anilox roll across the chamber frame. This dimensional repositioning allows the pipe to be integrated into the chamber frame's structural support system, converting it from a potential source of bending moments to a structurally supported component, thereby maintaining both ink supply function and frame stability
Solution Approach 2:
The chamber frame is designed to serve multiple functions: it supports the ink reservoir, provides structural rigidity against printing loads, and incorporates the ink carrier pipe as an integrated component. By making the chamber frame multi-functional, the patent eliminates the need for separate pipe mounting structures that could cause bending, thereby maintaining stability while providing ink supply capability
Data Source
AI summary
Disclosed is a corrugated paperboard printer comprising a chamber which reserves ink, wherein the chamber comprises a chamber frame comprising an ink reservoir which reserves the ink. A steel member and a recovery pipe are arranged on the opposite side of an anilox roll across the chamber frame. The steel member comprises a web extending in an up-down direction, and a first flange and a second flange connected, respectively, to up-down directional opposite ends of the web. The web is penetratingly formed with a maintenance opening in accordance with the position of a coupling port valve or the like. The second flange is formed with an insertion part for allowing the recovery pipe or the like to be inserted therein.