Dye sublimation calender
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Solution Overview
Problem
The current sublimation calender and heat press processes require constant replacement of protective paper to absorb excess ink, leading to waste and potential ghosting issues due to residual ink, and do not effectively control the ink vapor cloud during the sublimation process.
Innovation Solution
An endless feed belt system that can be cleaned directly, either by itself or in conjunction with a pressure belt, absorbs excess dye and ink vapor, eliminating the need for protective paper and utilizing a cleaning station with a squeegee and heating unit to maintain the belt at a temperature below sublimation levels for desublimation, along with vacuuming to manage vapor clouds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective paper is used to absorb excess ink, then the drum is protected from ink contamination, but the paper must be constantly replaced causing waste and potential ghosting issues
Solution Approach 1:
The drum surface is designed to be self-cleaning through its rotation, which automatically removes excess ink without requiring external protective paper. The drum's continuous motion allows it to shed ink residues naturally, eliminating the need for consumable protective materials while maintaining protection functionality.
Solution Approach 2:
Instead of using disposable protective paper that must be discarded, the system recovers the drum surface by allowing it to naturally shed and remove ink residues through its rotation. The drum surface effectively recovers its clean state continuously during operation, eliminating waste generation.
2Object-affected harmful factors
If protective paper is used between fabric and drum, then excess ink is absorbed, but the system complexity increases due to paper handling requirements
Solution Approach 1:
The protective paper component is completely extracted and removed from the system. The drum surface directly contacts the fabric without any intermediate protective paper, eliminating the need for paper loading, positioning, and replacement operations, thereby simplifying the overall system.
Solution Approach 2:
The drum surface serves multiple functions simultaneously: it provides the heating surface for sublimation, directly contacts the fabric for ink transfer, and automatically manages excess ink removal through its rotation. This multi-functionality eliminates the need for separate protective paper components.
3Reliability
If the drum is cleaned manually, then ink residue is removed, but production time is lost during cleaning cycles
Solution Approach 1:
The drum's cleaning function is integrated into its continuous rotation operation. As the drum rotates during normal operation, it continuously sheds and removes ink residues without interrupting the printing process. This continuous self-cleaning action eliminates dedicated cleaning cycles and maintains productivity.
Solution Approach 2:
The drum performs its own cleaning function through rotation, removing ink residues automatically during normal operation. This self-service capability eliminates the need for external cleaning interventions that would stop production, allowing the drum to maintain cleanliness without sacrificing productivity.
4Reliability
If protective paper is used on both sides of fabric, then the calender is protected from ink, but material waste increases
Solution Approach 1:
The calender drum surface serves itself by automatically removing and shedding ink residues through its rotation. This self-cleaning property protects the calender from ink contamination without requiring external protective paper on either side of the fabric, thereby eliminating material waste.
Solution Approach 2:
The system eliminates the need for disposable protective paper by allowing the drum to continuously recover its clean surface through rotation. The drum sheds ink residues and maintains its protective function indefinitely without consuming any protective materials.
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 solution reduces waste by eliminating the need for consumable paper, effectively absorbs and removes excess ink, and controls ink vapor, preventing ghosting and ensuring clean conditions for subsequent prints.
Implementation Method 1
maintaining the belt at a temperature below sublimation levels for desublimation
Implementation Method 2
along with vacuuming to manage vapor clouds
Implementation Method 3
The elevated temperature causes rapid sublimation, leading to a cloud of ink vapor
Data Source
AI summary
A fixation/transfer device for control of dye waste in a dye sublimation process. The device comprises a textile inlet, a textile outlet, a heat press or calender, an endless belt for driving the textile from the textile inlet to the textile outlet through the heat press, the heat press being held at a temperature sufficient to cause sublimation of the printing dye, and a cleaning station for cleaning the endless belt, the cleaning station being located downstream of the textile outlet and upstream of the textile outlet. The feed belt may be heated at the cleaning station so that sublimation may assist cleaning.