Automated Varnish Sanding for Print Gloss and Repair
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Solution Overview
Problem
Current methods for coating printed images lack superior glossiness, definition, and durability, and are not cost-effective, with existing techniques failing to integrate the coating seamlessly with the print, and none allow for subsequent abrasive treatments or damage repair.
Innovation Solution
A method involving the application of a high-solid-content varnish, followed by sanding and polishing in an automated process, to achieve enhanced glossiness, hardness, and a unified appearance with the print, allowing for multiple layers and automated machinery to minimize imperfections and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gloss coat with epoxy resin is applied, then the print is protected and finished, but the surface cannot be subsequently treated with abrasive means and imperfections like air bubbles remain visible
Solution Approach 1:
The coating process is divided into multiple separate layers (first varnish layer, second varnish layer) rather than applying a single thick coating. This segmentation allows each layer to be treated independently with abrasive means, enabling removal of imperfections like air bubbles while maintaining the protective function of the complete coating system.
Solution Approach 2:
Abrasive treatment and polishing are performed on intermediate layers before the final protective coating is complete. This preliminary action allows imperfections to be removed early in the process when the coating is still workable, preventing them from becoming permanent defects in the finished product.
2Reliability
If plexiglass is adhered to protect the image, then the print is protected, but the material must be transparent and cannot be treated with abrasive means
Solution Approach 1:
The varnish coating system is designed to work with multiple substrate types (paper, wood, aluminum, plastic) without requiring transparency or specific material properties. The coating adapts to different substrates universally, eliminating the limitation of plexiglass which must be transparent and cannot accept abrasive treatment.
3Productivity
If varnish is applied by UV technique, then the print is coated, but the result lacks hardness, glossiness and definition compared to the desired outcome
Solution Approach 1:
The coating process uses continuous manual or automated application of multiple varnish layers rather than a single UV coating step. Each layer is followed by continuous abrasive treatment and polishing, creating a cumulative effect that progressively enhances hardness, glossiness, and definition beyond what a single UV coating can achieve.
Solution Approach 2:
The process transforms the coating parameters by applying multiple layers with varying thicknesses and performing progressive abrasive treatment with different grits followed by polishing. This parameter transformation converts a simple coating into a multi-stage process that achieves superior glossiness and definition.
4Ease of manufacture
If manual varnishing is performed, then the print is coated, but the process is not automated and additional treatments cannot be performed
Solution Approach 1:
The process is designed to be dynamically adaptable, allowing manual application for small items or automated machinery for large-scale production. The multi-layer structure with intermediate treatment steps enables the process to be scaled and automated while maintaining the ability to perform additional treatments like abrasive treatment and polishing at each stage.
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 method achieves a high-gloss, durable finish that integrates the coating with the print, reducing costs and enabling repair, with improved uniformity and perception of glossiness and volume, surpassing existing techniques in all aspects.
Implementation Method 1
applying an epoxy resin on any type of print
Implementation Method 2
sanding and polishing said varnish in order to clean out impurities
Implementation Method 3
polishing said varnish in order to clean out impurities and to achieve uniformity over the entire surface
Implementation Method 4
a UV (ultraviolet) technique
Data Source
AI summary
The invention relates to a method for coating any type of printed image, comprising the steps of a) printing an image on the surface of a substrate conventionally or digitally; b) applying at least one layer of a varnish product on the printed surface; c) sanding the surface to eliminate accumulations of material, impurities and other unwanted adhered elements; d) polishing the surface to eliminate imperfections; and e) glossing.