Multi-Layer Sublimation Heating With Vacuum and Temperature Feedback
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Solution Overview
Problem
Existing methods for applying visual designs to multi-layered items like snowboards and skis using sublimation often fail to maintain the integrity of adhesive bonds between layers, especially when heating surfaces to sublimation temperatures, leading to potential separation and non-uniform ink penetration.
Innovation Solution
A sublimation device with a vacuum system, heating mechanisms, and temperature sensors is used to uniformly heat and transfer ink onto multi-layered workpieces while monitoring surface temperatures to avoid adhesive breakdown, ensuring uniform ink penetration without separating layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heating surfaces to sublimation temperatures to transfer ink, then ink transfer efficiency is improved, but adhesive bond integrity deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling heating parameters (temperature, time, energy distribution) to achieve sublimation ink transfer while maintaining adhesive bond integrity. The system adjusts heating parameters dynamically based on workpiece characteristics and adhesive properties to resolve the contradiction between efficient ink transfer and adhesive protection.
Solution Approach 2:
The patent implements feedback control through temperature sensors that monitor surface temperature during heating. The controller receives temperature feedback and adjusts heating power in real-time to prevent adhesive breakdown while ensuring sufficient heat for ink sublimation, thereby resolving the contradiction between ink transfer efficiency and adhesive integrity.
2Manufacturing precision
If heating to sublimation temperatures, then ink penetration is achieved, but temperature uniformity deteriorates
Solution Approach 1:
The patent applies local quality by using multiple independently controllable heating elements that can provide different energy levels to different zones of the workpiece. This allows tailored heating patterns that account for variations in workpiece geometry, material properties, and ink requirements across different areas, achieving uniform ink penetration despite temperature variations.
Solution Approach 2:
The patent implements dynamic control of heating parameters during the ink transfer process. The system continuously adjusts heating power, duration, and distribution based on real-time temperature feedback and process stage, enabling adaptive temperature management that maintains ink penetration uniformity while preventing localized overheating.
3Force
If applying vacuum to draw sheet against workpiece, then contact pressure is improved, but device complexity increases
Solution Approach 1:
The patent applies pneumatic principles by using a vacuum system to create negative pressure that draws the ink sheet into conformal contact with the workpiece surface. This provides uniform contact pressure across complex geometries without requiring mechanical pressure application systems, resolving the contradiction between achieving sufficient contact pressure and maintaining device simplicity.
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 enables uniform ink penetration into multi-layered workpieces, maintaining adhesive integrity and allowing for custom artwork application on finished products, reducing overstock, and enabling rapid production of personalized items.
Implementation Method 1
heating, using at least one energy source, the ink and the first surface of the multi-layered workpiece to at least a sublimation temperature of the ink
Implementation Method 2
a vacuum device to produce a vacuum to draw the first membrane against the sheet to draw the sheet against the multi-layered workpiece
Data Source
AI summary
A sublimation device, for transferring ink from a sheet to a multi-layered workpiece, includes: a first membrane; a vacuum device to produce a vacuum to draw the first membrane against the sheet to draw the sheet against the multi-layered workpiece; a heating mechanism comprising at least one energy source to heat the ink and at least a first surface of the multi-layered workpiece to at least a sublimation temperature of the ink while the sheet is drawn against at least the first surface of the multi-layered workpiece and the first membrane is drawn against the sheet; a sensor mechanism capable of sensing at least one sensed temperature indicative of at least one surface temperature of the first surface of the multi-layered workpiece; and a controller, communicatively coupled to the heating mechanism and the sensor mechanism, to control the heating mechanism based on the at least one sensed temperature.