Plate Cylinder Segmented Recesses for Strength
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Solution Overview
Problem
Conventional plate cylinders used for mounting printing plates on metallic cans face issues with strength degradation, particularly when hollow spaces are formed for weight reduction, leading to deflection and reduced strength, especially when thinning is applied for further weight reduction.
Innovation Solution
A plate cylinder design featuring a flat portion with multiple hole portions and movable plate fixing members that can be fitted radially inward and outward, allowing for adjustable fixation and enhanced strength, along with air ejection holes for easy attachment and detachment of printing plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a hollow space is formed inside the plate cylinder for weight reduction, then the weight of the plate cylinder is reduced, but the strength of the outer peripheral surface deteriorates causing deflection
Solution Approach 1:
The continuous recess in conventional designs is segmented into multiple separate recesses arranged in the axial direction. This segmentation maintains weight reduction benefits while preserving structural strength by distributing the material removal across discrete locations rather than creating a large continuous hollow space that would cause deflection.
Solution Approach 2:
Instead of creating a large hollow space in the radial direction (which compromises strength), the design transitions to multiple small recesses distributed along the axial dimension. This dimensional redistribution maintains weight reduction while preserving radial structural integrity.
2Weight of moving object
If the plate cylinder is thinned for further weight reduction, then the weight is reduced, but the strength reduction becomes significant
Solution Approach 1:
Multiple separate recesses are provided instead of a single large recess, allowing the plate cylinder wall to maintain adequate thickness in most areas while still achieving weight reduction through strategic material removal at discrete locations.
Solution Approach 2:
Material is removed only at specific locations where recesses are needed for plate fixing, rather than uniformly thinning the entire plate cylinder. This localized material removal achieves weight reduction while preserving overall structural strength.
3Ease of operation
If a recess extending over the large part of the axial length is formed for plate fixing, then the plate can be fixed, but the strength of the outer peripheral surface deteriorates
Solution Approach 1:
The plate fixing function is achieved through multiple separate recesses distributed along the axial direction rather than a single continuous recess. This segmentation provides adequate plate fixing capability while preserving structural strength by limiting material removal at any single location.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design increases the strength of the plate cylinder, facilitates easy mounting and detachment of printing plates, and reduces weight while maintaining structural integrity, even with thin wall thickness, by providing adjustable fixation and an air layer for slippage assistance during operations.
Implementation Method 1
The plate cylinder main body is provided with an air ejection hole at a position away from a tip end side by 20 mm to 50 mm
Data Source
AI summary
A plate cylinder enables a printing plate to be attached thereto and is improved in strength. A plate cylinder is attached to a rotationally driven plate driving shaft, and is configured to mount a cylindrical printing plate attached thereon from a tip end side thereof. The plate cylinder is provided with a plate cylinder main body having a plate mounting surface to which the printing plate is attached. A flat portion is formed on a flat surface positioned further toward a radially inner side than the plate mounting surface. A plurality of hole portions is formed side by side in an axially separated state in the flat portion. A plurality of plate fixing members tightly fixes the printing plate to the plate mounting surface. The plate fixing members are fitted into the hole portions, and are provided to be movable in radially inward and outward directions of the plate cylinder.