Embossing Tool Metallic Coating Gloss Variation
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Solution Overview
Problem
Existing methods for producing embossing tools with complex surface structures face challenges in achieving precise and reproducible surface designs, particularly with large-format press plates and endless belts, due to difficulties in mask positioning and removal, leading to high costs and complexity in achieving high imaging accuracy and resolution.
Innovation Solution
Applying a first metallic coating over the entire surface of the embossing tool and a further metallic coating in predetermined areas with a different degree of gloss, using digital printing technology to ensure precise application and removal of masks, and subsequent chrome plating to achieve varying gloss levels for enhanced visual realism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional screen printing or photo layer methods are used to apply masks for surface etching, then the surface structure can be formed, but the mask positioning and removal become difficult and expensive, reducing manufacturing precision and increasing device complexity
Solution Approach 1:
The patent replaces traditional mechanical mask application methods (screen printing, photo layers) with a direct digital printing method. The mask is applied directly to the surface using digital printing technology, eliminating the need for separate mask positioning and removal steps. This substitution of mechanical processes with digital/chemical processes resolves the contradiction by achieving high surface structure precision without the complexity of traditional masking systems.
Solution Approach 2:
The patent uses digital printing to create a direct copy of the desired surface structure pattern onto the mask material. The digital file serves as a template that is directly reproduced on the surface, eliminating the need for physical mask templates and their associated positioning problems. This copying approach resolves the contradiction by providing precise surface structure reproduction without the complexity of traditional mask handling.
2Shape
If multiple exposure and etching processes are performed to achieve three-dimensional structures, then the surface structure complexity increases, but the reproducibility and imaging accuracy deteriorate due to mask positioning difficulties
Solution Approach 1:
The patent replaces multiple mechanical mask application steps with a single digital printing process. The digital printing method allows for direct application of the mask pattern in one operation, eliminating cumulative positioning errors that occur with multiple exposure and etching cycles. This substitution enables high three-dimensional structure complexity while maintaining imaging accuracy through digital precision rather than mechanical repetition.
3Reliability
If wax is applied to create masks for etching, then the surface can be protected in areas, but the wax removal becomes difficult and expensive, increasing loss of substance and manufacturing complexity
Solution Approach 1:
The patent uses a disposable mask material that is applied directly via digital printing and does not require difficult removal processes. The mask is designed to be easily removed or integrated into the final surface structure, eliminating the expensive and difficult wax removal step. This approach maintains reliable surface protection during the etching process while dramatically improving ease of manufacture by eliminating the problematic removal phase.
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 method allows for the creation of embossing tools with congruent and reproducible surface structures that mimic natural wood, achieving a lifelike appearance by emphasizing raised and lower-lying areas with different gloss levels, resulting in a surface that closely resembles real wood.
Implementation Method 1
the surface is provided with a first metallic coating over its entire surface
Implementation Method 2
at least one further metallic coating is arranged on the first coating in predetermined areas, with the degree of gloss of the first coating differing from that of the further coating
Implementation Method 3
subsequent chrome plating to achieve varying gloss levels for enhanced visual realism
Data Source
Figure 1~2
AI summary
The invention relates to a method for processing a structured surface of an embossing tool, in which the surface is fully coated with a first metallic coating (6). To increase the design possibilities of structured surfaces, the invention proposes that at least one further metallic coating (7) be applied to the first coating (6) in predetermined areas, wherein the gloss level of the first coating (6) differs from that of the further coating (7). This measure allows, for example, a significantly better imitation of wood pores.