Wiper Positioning for Flame Resistance in Liquid Ejection
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Solution Overview
Problem
Existing liquid ejection apparatuses face challenges in selecting a wiper material that balances flame resistance with high liquid absorbing efficiency, as materials with both properties are limited.
Innovation Solution
A liquid ejection apparatus design where the wiper is wound by a winding roller closer to a driving source with a high flash point ink, positioned to minimize flame risk, allowing for a wider range of material choices and compact positioning of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiper is made of a flame retardant material with high flame resistance, then the flame resistance is improved, but the liquid absorbing property deteriorates
Solution Approach 1:
The wiper is designed with different material properties in different regions. The portion near the winding roller (where flame risk is highest due to proximity to the motor) is made of flame retardant material, while other portions can use materials with better liquid absorbing properties. This allows each region to have optimized properties for its specific function and risk level.
Solution Approach 2:
The wiper is constructed using composite materials that combine flame retardant properties with liquid absorbing capabilities. By using composite structures, the wiper achieves both flame resistance and effective liquid absorption without having to choose one property over the other.
2Productivity
If the wiper is made of materials with high liquid absorbing property, then the liquid absorbing efficiency is improved, but the flame resistance deteriorates
Solution Approach 1:
Different portions of the wiper have different material compositions tailored to their specific requirements. High liquid absorbing materials are used in regions away from the motor, while flame retardant materials are used near the winding roller where thermal risk is highest.
Solution Approach 2:
Composite material structures allow the wiper to simultaneously achieve high liquid absorbing efficiency and adequate flame resistance by combining materials with complementary properties in a single integrated component.
3Device complexity
If the driving source is positioned closer to the feeding roller, then the device complexity is reduced, but the flame risk to the wiper increases
Solution Approach 1:
The wiper's material properties are locally optimized based on its position relative to the driving source. The portion near the winding roller (which is closer to the motor) uses flame retardant material to counteract the increased flame risk from motor proximity, while maintaining simple overall device positioning.
4Reliability
If the wiper material choices are limited to flame retardant materials, then the flame resistance is ensured, but the adaptability of material selection deteriorates
Solution Approach 1:
The wiper is designed with spatially varying material properties, allowing different material choices for different portions. This enables the use of flame retardant materials only where necessary (near the winding roller) while using a broader range of materials in other regions, thus expanding overall material selection adaptability.
Solution Approach 2:
By using composite material structures, the invention expands material selection possibilities by combining different material types within a single wiper component, allowing customization for specific application requirements while maintaining necessary flame resistance.
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 design enhances flame resistance of the wiper, expands material selection options, and allows for more flexible positioning of the driving source, while preventing sparks from reaching the wiper and maintaining efficient ink absorption.
Implementation Method 1
a wiper that absorbs liquid attached on a nozzle forming surface of an ejection head
Implementation Method 2
When the motor drives, the ambient temperature in the printer increases
Data Source
AI summary
A liquid ejection apparatus includes an ejection head having nozzles that eject liquid, a strap member that holds the liquid ejected from the ejection head, a feeding roller and a winding roller around which the strap member is wound, and a driving source that rotates the winding roller, wherein a flash point of the liquid that is held in the strap member is 95 degrees Celsius or more, and the driving source is disposed at a position closer to the winding roller than to the feeding roller.