Transfer Sheet Linear Protrusion Layout to Minimize Optical Steps
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Solution Overview
Problem
In roll molds produced by conventional cutting techniques, an optical step occurs between adjacent linear grooves due to tool wear, resulting in visible color differences or joints in transfer sheets, which affect product quality.
Innovation Solution
The formation order of linear grooves on the roll base material is optimized to reduce the optical step by alternating the direction of groove formation and adjusting the groove depth in a gradual manner, ensuring that the difference in groove depth between adjacent grooves is minimized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cutting techniques are used to form linear grooves sequentially, then manufacturing cost is reduced, but optical step and color difference occur between adjacent grooves
Solution Approach 1:
The invention applies preliminary action by pre-calculating and optimizing the groove formation sequence before actual manufacturing. The formation order is determined in advance to minimize the difference in cutting tool wear across adjacent grooves, thereby preventing optical steps and color differences before they occur during the cutting process.
Solution Approach 2:
The invention implements dynamics by making the groove formation sequence adaptive rather than fixed. The optimal formation order is determined based on the specific roll mold dimensions, groove patterns, and cutting tool characteristics, allowing the manufacturing process to dynamically adjust the sequence to minimize tool wear variation and achieve uniform optical properties.
2Productivity
If linear grooves are formed sequentially one by one, then manufacturing cost is reduced, but productivity is lowered due to repeated tool wear and adjustments
Solution Approach 1:
The invention applies preliminary action by pre-determining the optimal groove formation sequence that minimizes tool wear impact. This allows multiple grooves to be formed in an optimized order without requiring frequent tool adjustments, thereby improving productivity while maintaining groove depth uniformity throughout the manufacturing process.
3Manufacturing precision
If the same cutting tool is used for all grooves, then manufacturing cost is reduced, but tool wear causes optical steps between grooves
Solution Approach 1:
The invention applies preliminary action by pre-calculating the optimal groove formation sequence that compensates for tool wear. This allows the use of a single cutting tool for all grooves while maintaining optical uniformity, as the sequence is designed to minimize the impact of progressive tool wear on adjacent grooves.
Solution Approach 2:
The invention implements parameter changes by varying the formation sequence of grooves rather than processing them in a fixed sequential order. This changes the process parameters (formation order) to optimize the distribution of tool wear effects, thereby achieving uniform optical properties while using a single cutting tool.
Data Source
AI summary
Provided is a transfer sheet. The transfer sheet includes a plurality of linear protrusions extending and arranged side by side on a surface thereof. The plurality of linear protrusions are arranged in a manner that a gradual decrease and a gradual increase in protrusion height are repeated.