Blade Pressing Force Control for Printing and Coating Rollers
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Solution Overview
Problem
The existing blade members in printing and coating devices are difficult to adjust pressing force accurately due to their thin plate-like shape, which is sensitive to slight changes in pressure, affecting print quality.
Innovation Solution
A blade device with a deformation member that adjusts pressing force by expanding and contracting, positioned closer to the roller than the tip end of the holding part, and equipped with a protective film or surface treatment for solvent resistance, allowing precise control of the pressing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thin plate-like blade member is used, then the blade can contact the roller effectively, but the pressing force cannot be adjusted accurately due to sensitivity to slight pressure changes
Solution Approach 1:
The patent applies the dynamics principle by replacing the static thin plate-like blade member with a deformable member that can dynamically adjust its shape and pressing force. The deformable member is configured to be elastically deformable, allowing it to adapt its pressing force against the roller based on operational requirements, thereby achieving accurate pressing force adjustment while maintaining structural simplicity.
Solution Approach 2:
The patent applies the parameter changes principle by modifying the physical state of the blade member from rigid to deformable. The deformable member can change its deformation parameter (degree of bending or compression) to adjust pressing force, transforming the fixed-parameter rigid structure into a variable-parameter flexible structure that enables precise force control.
2Manufacturing precision
If the deformation member is positioned closer to the roller, then pressing force acts more directly on the tip end, but the deformation member may be damaged by solvent in the coating material
Solution Approach 1:
The patent applies the intermediary principle by introducing a protective film as a mediator between the deformation member and the coating material containing solvent. The protective film is provided on the surface of the deformation member that contacts the coating material, acting as a barrier that prevents direct interaction between the solvent and the deformation member, thereby protecting the deformation member from chemical damage while allowing it to function close to the roller.
Solution Approach 2:
The patent applies the flexible shells and thin films principle by using a protective film coating on the deformation member. This thin film layer provides chemical resistance against the solvent in the coating material while maintaining the deformable nature of the underlying member, allowing the deformation member to be positioned close to the roller for precise pressing force control without compromising durability.
3Manufacturing precision
If the blade member is made thinner for better coating control, then coating precision improves, but the blade becomes more sensitive to pressure changes
Solution Approach 1:
The patent applies the parameter changes principle by changing the mechanical property parameter of the blade member from rigid to deformable. The deformable member can change its effective thickness or compliance parameter to maintain stable pressing force, allowing the blade to be thin for precise coating control while compensating for pressure sensitivity through controlled deformation.
Solution Approach 2:
The patent applies the dynamics principle by making the blade member deformable rather than rigid. This allows the blade to dynamically adjust its pressing characteristics in response to pressure changes, maintaining coating precision while reducing sensitivity to external pressure variations through elastic deformation compensation.
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 blade device enables accurate adjustment of pressing force on the roller, reducing interference from other members and enhancing print quality by stabilizing the pressure application.
Implementation Method 1
a deformation member contacting with the blade member and enabling to expand and contract by pressure of fluid
Implementation Method 2
the deformation member is provided with a protective film which provides resistivity against the solvent in the coating material
Data Source
Figure 1
Figure 2(A)~2(C)
Figure 3(A)~3(B)
AI summary
Provided are a blade device equipped with a blade member which can accurately adjust pressing force due to a blade member, and a printing machine and a coating device equipped with the blade device. A blade device 40 according to the present invention has: a blade member 41 contacting with a plate roll 10 to which coating material is to be applied; an upper holder 43 contacting with the blade member from one surface side of the blade member; a lower holder 44 contacting with the blade member from another surface side of the blade member; a tube 42 contacting with the blade member and configured to expand and contract by pressure of fluid; and a tube positioning part 43a which is provided on the upper holder and positions the tube closer to the roller, in a direction in which the blade member extends, than a tip end of the lower holder is. The tube adjusts a pressing force, of the tip end of the blade member, against the roller by being expanded or contracted while being held by the tube positioning part and the blade member.