Apparatus for dyeing edges of leather pieces

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing apparatuses for dyeing leather edges face inefficiencies due to large dyeing shaft diameters, which reduce dye transfer efficiency, require multiple applications, and complicate cleaning and reaching sharp corners, while also having complex mechanical structures.

Innovation Solution

A compact apparatus with a driven vertical dyeing shaft of 6-8 mm diameter, equipped with an eccentric pump and a magnetic coupling, allows for efficient dye transfer and easier cleaning by separating the electrical and dyeing components, and simplifies the actuating structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large diameter dyeing shaft is used, then the mechanical structure is more stable, but the dye transfer efficiency decreases and it cannot reach sharp corners

Engineering Contradiction:

Improvemechanical structure stabilityVSAvoiddye transfer efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent changes the critical parameter of dyeing shaft diameter from conventional large sizes to a specific small range (6-8 mm). This parameter change enables the shaft to reach sharp corners and acute angles while maintaining adequate mechanical stability through the magnetic coupling system and eccentric pump design.

Inventive Principle:

Principle #35Parameter changes

2Strength

If a large diameter dyeing shaft is used, then the structure is more robust, but the number of dye applications required increases

Engineering Contradiction:

Improvestructural robustnessVSAvoidnumber of dye applications

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

By changing the dyeing shaft diameter parameter to 6-8 mm, the system achieves adequate structural robustness through the magnetic coupling and eccentric pump mechanism, while simultaneously reducing the number of dye applications needed due to improved dye transfer efficiency from the smaller shaft surface area.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If a complex mechanical actuating structure is used, then the dyeing process is more controllable, but the device complexity increases and cleaning becomes difficult

Engineering Contradiction:

Improvedyeing process controlVSAvoidactuating structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical actuating structures with a magnetic coupling system that provides precise control through magnetic field interaction. This substitution maintains dyeing process controllability while significantly reducing mechanical complexity and facilitating easier cleaning by eliminating complex mechanical joints and seals.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic coupling acts as an intermediary between the motor and the dyeing shaft, transmitting rotational motion and control without direct mechanical contact. This intermediary mechanism maintains precise control while simplifying the overall structure and enabling easier cleaning by eliminating the need for disassembly of complex mechanical connections.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Stability of the object's composition

If a large diameter dyeing shaft is used, then the structural stability is improved, but the ability to dye acute angles and sharp corners decreases

Engineering Contradiction:

Improvestructural stabilityVSAvoidability to dye sharp corners

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent changes the dyeing shaft diameter parameter to 6-8 mm, which provides sufficient structural stability through the magnetic coupling system while enabling the shaft to access and dye acute angles and sharp corners that would be inaccessible to larger diameter shafts.

Inventive Principle:

Principle #35Parameter changes

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 design enhances dye transfer efficiency per application, reduces the number of dye applications needed, facilitates high-quality dyeing of acute angles, and simplifies the dyeing process with easier cleaning and increased reliability.

Implementation Method 1

The motor which actuates the dyeing shaft is actuated through a magnetic coupling

Methodology Applied

Scientific EffectMagnetic coupling: Magnetism

Implementation Method 2

an eccentric pump, being connected to said dyeing shaft by means of a channel-and-tube system for supplying dye to said dyeing shaft

Methodology Applied

Scientific EffectEccentric pump mechanism: Eccentric

Data Source

PatentEP3568496B1Apparatus for dyeing edges of leather pieces

Publication Date: 2021.01.20 PROLET LTD

Figure 1
Figure 2a~2b
Figure 3~4

AI summary

The apparatus comprises a vertically arranged dyeing head (1) having a dyeing shaft (4) connected to a motor (2) through a coupling (3). Said dyeing head (1) comprises said dyeing shaft (4) and an eccentric pump (5), having a common rotation axis (6) and being connected to each other by means of a channel-and-tube system (7) for supplying dye to said dyeing shaft (4). The dyeing shaft (4) is provided with a plate (12) for controlling the thickness of the dye film on said dyeing shaft (4) and said plate (12) is arranged perpendicularly to the rotation axis (6) and tangentially to the lateral surface of the dyeing shaft (4). The eccentric pump (5) includes an eccentric cylinder (17) closed at the top by the bottom of a dye tank (8), wherein an opening (18) for supplying dye to the eccentric pump (5) is formed.