Printed Sheet Coating With Heated Pressurizing Rollers for Toner Fixation
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Solution Overview
Problem
The coated layer on printed sheets or plates formed using electronic printers tends to peel off easily, likely due to insufficient aggregation and fixation of toner on the printing surface.
Innovation Solution
A coating apparatus with a pressurizing roller pair and a heating section is used to simultaneously heat and pressurize the printed surface, ensuring proper aggregation and fixation of toner, utilizing rollers with low friction coefficients to prevent toner adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electronic printing is used to form printed layers on workpieces, then printing efficiency and versatility are improved, but the coated layer peels off easily due to insufficient toner aggregation and fixation
Solution Approach 1:
The invention applies preliminary heating and pressurization to the printed surface before coating to ensure proper toner aggregation and fixation. The heating section heats the printed surface to melt and aggregate toner particles, while the pressurizing roller pair applies pressure to firmly fix the toner on the workpiece surface, creating a stable foundation for subsequent coating application.
Solution Approach 2:
The invention changes the temperature and pressure parameters of the printed surface to improve toner fixation. By controlling the heating temperature and pressurization force, the toner transitions from a loose state to an aggregated and firmly fixed state, thereby preventing coated layer peeling without affecting printing efficiency.
2Reliability
If heating and pressurization are applied to fix toner on the printed surface, then coated layer peeling is suppressed, but device complexity increases due to additional heating section and pressurizing roller pair
Solution Approach 1:
The pressurizing roller pair serves multiple functions: it pressurizes the printed surface to fix toner, conveys the workpiece through the coating section, and maintains contact between the workpiece and the heating section. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
Solution Approach 2:
The invention combines the heating section and pressurizing roller pair into an integrated system that works协同 to fix toner. The heating section and pressurizing roller pair are positioned to simultaneously act on the printed surface, merging their functions into a unified preprocessing step before coating, which streamlines the overall apparatus structure.
3Reliability
If pressurizing roller pair is disposed on the upstream side of the coating processing section, then toner is aggregated and fixed before coating application, but the structure becomes more complex and occupies more space
Solution Approach 1:
The pressurizing roller pair is disposed to act on the workpiece in a dimension perpendicular to the coating application direction, allowing toner fixation to occur simultaneously with workpiece conveyance rather than as a separate sequential step. This spatial arrangement optimizes the use of available space and reduces overall apparatus footprint.
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 solution effectively prevents the peeling of the coated layer by ensuring the toner is properly fixed on the printing surface, enhancing the durability of the coating.
Implementation Method 1
a heating section disposed at the same position as or on an upstream side of the pressurizing roller pair with respect to a conveyance direction of the workpiece and configured to heat the printed surface of the workpiece
Implementation Method 2
a pressurizing roller pair disposed on an upstream side or a downstream side of the coating processing section and configured to sandwich, pressurize and convey the workpiece
Implementation Method 3
a surface of one roller of the pressurizing roller pair, the one roller being located on a side in contact with the printed surface, is made of a material having a friction coefficient of 0.1 or less
Data Source
AI summary
A coating apparatus including: a coating processing section configured to perform predetermined coating processing on a printed surface of a workpiece which is a sheet or a plate having a surface subjected to electronic printing processing; a pressurizing roller pair disposed on an upstream side or a downstream side of the coating processing section and configured to sandwich, pressurize and convey the workpiece; and a heating section disposed at the same position as or on an upstream side of the pressurizing roller pair with respect to a conveyance direction of the workpiece and configured to heat the printed surface of the workpiece.