Screen Printing on Bent Base Members via Dynamic Plate Movement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing screen printing methods for base members with bent portions often result in printing defects such as blur, missing ink, or chipping due to insufficient contact pressure, and struggle to achieve uniform thickness and alignment of printed layers, especially when the bent portion has a small radius of curvature or deep bending depth.
Innovation Solution
A method involving a printing apparatus with a screen plate and frame body that allows relative movement in the normal direction of the printing target surface, using a squeegee to extrude printing material through an opening pattern, ensuring consistent contact pressure and alignment across flat and bent portions, even those with complex curvatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the screen plate is fixed to the frame with high tension to maintain plate shape in the bent portion, then the plate shape is maintained, but the squeegee cannot press the screen plate sufficiently, causing printing defects
Solution Approach 1:
The screen plate is made movable relative to the frame body in the normal direction of the printing target surface, allowing the plate to dynamically adjust its position during printing. This enables the squeegee to press the screen plate sufficiently against the bent portion while the plate maintains its overall shape through controlled movement rather than fixed high tension
Solution Approach 2:
The system separates the screen plate from the frame body, allowing independent movement of the screen plate. This segmentation enables the plate to move independently to achieve sufficient pressing contact with the bent portion while the frame body remains stable, resolving the conflict between plate shape maintenance and printing quality
2Manufacturing precision
If the flat portion and bent portion are printed separately to avoid printing defects, then printing defects are avoided, but the printing process becomes complicated and uniform thickness cannot be achieved
Solution Approach 1:
The invention merges the printing of flat portions and bent portions into a single continuous process. The screen plate can move to accommodate both flat and bent portions during one printing operation, eliminating the need for separate printing steps while maintaining printing quality and achieving uniform thickness across different surface types
Solution Approach 2:
The printing apparatus is designed with multi-functionality to handle both flat and bent portions using the same screen plate and printing mechanism. The screen plate's ability to move relative to the frame body allows it to universally print on various surface geometries without requiring separate printing processes
3Area of stationary object
If multiple printing passes are used to cover different portions, then complete coverage is achieved, but step portions form at overlapping areas and alignment becomes difficult
Solution Approach 1:
The screen plate's dynamic movement capability allows it to continuously adjust its position during a single printing pass to cover both flat and bent portions. This eliminates the need for multiple stationary printing passes, preventing step portions from forming at overlap areas while maintaining complete coverage and uniform layer thickness
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
This approach enables the formation of a uniform printed layer without defects on base members with bent portions, including those with small radii of curvature or deep bending depths, improving printing accuracy and aesthetic appearance.
Implementation Method 1
forming the printed layer by extruding a printing material onto the printing target surface by the squeegee via the opening pattern of the screen plate
Data Source
AI summary
A producing method of a base member provided with a printed layer, the method including: disposing a printing plate including a screen plate having an opening pattern and a frame body supporting the screen plate so that the printing plate is opposed to a printing target surface of the base member having at least one bent portion; disposing a squeegee so as to be opposed to a plate surface of the screen plate opposite to the base member; and forming the printed layer by extruding a printing material onto the printing target surface by the squeegee via the opening pattern of the screen plate in a state where the frame body is supported so as to be relatively movable with respect to the printing target surface in a normal direction of the printing target surface.