Handheld Leather Edge Dyeing Shaft With Sealed Dye Circulation
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Solution Overview
Problem
Dyeing the edges of leather products, especially on large finished products, is difficult due to uneven dye application, inability to adjust dye layer thickness, drying of dye, and the need for quick color changes, which is hindered by traditional stationary machines.
Innovation Solution
A portable hand dyeing device with a hermetically sealed circulation system and adjustable dye layer thickness, using a magnetic coupling for easy color exchange, allowing operation at various angles and preventing dye drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a stationary machine is used for dyeing, then the dyeing process can be automated, but the device loses portability and cannot easily handle large finished products
Solution Approach 1:
The device is divided into a stationary base unit containing the motor and a separate handheld dyeing shaft assembly. This segmentation allows the automated motor to remain fixed while the dyeing shaft becomes portable and can access all parts of large finished products, resolving the contradiction between automation and portability.
2Quantity of substance
If the container is placed vertically above the dyeing shaft, then dye can be fed by gravitational pressure, but the dye leaks from the container
Solution Approach 1:
The gravitational pressure system is replaced with an electric pump that actively controls dye flow. This substitution eliminates uncontrolled leaking while maintaining efficient dye feeding to the shaft, resolving the contradiction between dye delivery and leak prevention.
3Ease of manufacture
If the dye container is open or has simple closure, then dye can be easily loaded, but the dye dries in the container
Solution Approach 1:
The dye container is sealed to create a protected environment that prevents dye exposure to air and drying. The system maintains dye freshness while allowing loading through the sealed structure, resolving the contradiction between ease of loading and dye preservation.
4Device complexity
If the dye layer thickness is fixed by container distance, then the structure is simple, but the thickness cannot be adjusted
Solution Approach 1:
The fixed distance structure is replaced with an adjustable mechanism that allows the container or shaft position to be dynamically changed. This enables variable dye layer thickness while maintaining reasonable structural simplicity, resolving the contradiction between structural simplicity and adjustability.
5Ease of operation
If a hand device is used for dyeing, then portability and accessibility are improved, but uniform dye application becomes difficult
Solution Approach 1:
The handheld shaft is equipped with an integrated motor that automatically rotates the shaft at controlled speeds. This self-service automation ensures uniform dye application while maintaining the portability and accessibility of the handheld design, resolving the contradiction between ease of operation and application uniformity.
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
Ensures uniform dye application, prevents dye thickening and drying, and allows quick color changes without washing, facilitating efficient dyeing of leather products at different angles.
Implementation Method 1
a magnetic coupling for easy color exchange
Implementation Method 2
a first screw pump, an insulating ring dividing the circulation cavity into isolated first and second parts, and a second screw pump
Data Source
Figure 1~3
Figure 4~7
Figure 8~10
AI summary
The invention relates to a handheld device for dyeing pieces of leather products, which comprises a dyeing shaft (2) connected by a magnetic coupling (15, 16) to an electric motor (22), a dye container (7), a first screw pump (9), a second screw pump (13) and a system for adjusting the thickness of the dye layer.