Vacuum Platen Assembly for Textile Printing Substrate Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional digital printing systems for textiles are cumbersome and poorly suited for accommodating substrates or printable areas of varying sizes, lacking effective securing mechanisms to prevent unwanted movement during printing.
Innovation Solution
A platen assembly with a substrate support and vacuum chamber system that uses adjustable vacuum pressure to securely hold textile substrates in place, facilitating printing, pre-treatment, and curing operations by drawing the substrate tightly against the support surface through apertures, allowing for optimized airflow and ink adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional securing mechanisms (clamps, edge frames, tacky surfaces) are used to prevent substrate movement, then substrate stability is improved, but device complexity and ease of operation deteriorate due to cumbersome setup and inability to accommodate varying substrate sizes
Solution Approach 1:
The patent employs a vacuum system with a vacuum chamber and vacuum source to create negative pressure that holds the substrate against the print platen. This pneumatic approach replaces complex mechanical securing mechanisms with a simple vacuum field that automatically adapts to different substrate sizes and shapes, eliminating the need for clamps, edge frames, or tacky surfaces while maintaining substrate stability during printing operations
2Stability of the object's composition
If conventional securing mechanisms are used to prevent substrate movement, then substrate stability is improved, but ease of operation worsens due to difficulty in accommodating substrates of varying sizes
Solution Approach 1:
The vacuum system serves multiple functions: it secures the substrate to the platen, maintains substrate flatness during printing, and accommodates substrates of varying sizes and shapes through adjustable vacuum pressure. This universal approach eliminates the need for different securing mechanisms for different substrate types, allowing operators to simply place the substrate on the platen and adjust vacuum pressure as needed
3Stability of the object's composition
If vacuum pressure is increased to improve substrate securing, then substrate stability improves, but risk of substrate damage or deformation increases
Solution Approach 1:
The system employs dynamically adjustable vacuum pressure that can be modified based on substrate type, size, and printing requirements. The vacuum pressure is not fixed but can be increased or decreased to match the specific needs of each substrate, providing strong holding force when necessary while preventing damage to delicate or flexible materials through reduced pressure when appropriate
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 system effectively secures substrates, reduces overspray, and enhances ink adhesion and wash fastness, while allowing for controlled moisture levels during printing and curing processes, accommodating various textile fabrics by adjusting vacuum pressure levels.
Implementation Method 1
A vacuum device is in communication with the vacuum chamber such that vacuum pressure is developed in the vacuum chamber during operation of the vacuum device and a corresponding air flow is developed through the one or more apertures
Data Source
AI summary
A platen assembly for use in digital printing includes a substrate support adapted to support the substrate thereon to facilitate printing to the substrate. One or more apertures are associated with the substrate support and the platen assembly includes a vacuum chamber in fluid communication with the one or more apertures. A vacuum device is in communication with the vacuum chamber such that vacuum pressure is developed in the vacuum chamber during operation of the vacuum device and a corresponding air flow is developed through the one or more apertures. A method for applying indicia to a textile substrate includes placing the textile substrate on a substrate support surface, and directing air through the textile substrate such that the substrate is drawn against the substrate support surface.