Rotating Drum Leather Treatment Process
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Solution Overview
Problem
Existing leather treatment processes are inefficient in reducing the exposure time of hides to chemicals and extending the drying time, which can be improved.
Innovation Solution
A process involving a rotating drum with temperature and humidity control, where hides are sprayed with chemicals, followed by controlled drying and milling steps to achieve desired humidity levels, allowing for faster treatment and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hides are soaked in rotating drum filled with tanning bath, then chemical exposure is achieved, but treatment time is excessive
Solution Approach 1:
The hides are pre-wetted with water before chemical spraying to ensure rapid and uniform absorption of chemicals. This preliminary preparation eliminates the need for prolonged soaking, reducing treatment time while maintaining effective chemical penetration and reaction.
Solution Approach 2:
Chemicals are applied to the hides using spray nozzles that distribute the tanning solution uniformly across the hide surface. This hydraulic application method replaces traditional prolonged soaking, achieving rapid and even chemical penetration significantly faster than conventional drum soaking methods.
2Productivity
If traditional drying processes are used, then hides are dried, but drying time is excessive
Solution Approach 1:
The drying process utilizes controlled temperature and humidity parameters within the rotating drum to accelerate moisture removal from hides. By optimizing these environmental parameters, the system achieves rapid drying without compromising leather quality, significantly reducing drying time compared to traditional methods.
Solution Approach 2:
Chemicals are sprayed onto the hides while they are still wet and rotating in the drum, allowing the chemicals to be absorbed during the drying process itself. This preliminary chemical application eliminates the need for separate soaking and drying stages, reducing total processing time.
3Speed
If chemicals are sprayed through nozzles, then chemical application speed is improved, but uniform distribution becomes challenging
Solution Approach 1:
The rotating drum provides a curved surface that allows spray nozzles to distribute chemicals uniformly across the hide as it rotates. The rotational motion ensures all areas of the hide pass through the spray zone, achieving even chemical distribution at high speed without manual intervention.
Solution Approach 2:
The system uses the dynamic rotation of the drum to achieve uniform chemical distribution. As the drum rotates, hides continuously move through the spray zone, ensuring all surfaces receive equal chemical exposure. This dynamic approach replaces static application methods, maintaining uniformity while increasing application speed.
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 process significantly reduces the time required for leather treatment by optimizing chemical exposure and drying times, enhancing the efficiency of the leather treatment process.
Implementation Method 1
spraying with chemicals and exposing them to suitable heat treatment
Implementation Method 2
spraying of said mixture is commenced through nozzle (4) with mixture of chemicals
Implementation Method 3
exposing them to suitable heat treatment
Implementation Method 4
drying using different processes
Implementation Method 5
said drum (1) is equipped with temperature control system, preferably heating system
Implementation Method 6
climate control system, preferably with device able to regulated humidity, more preferably by device capable by spraying water into said drum (1)
Implementation Method 7
milling in rotating drum
Implementation Method 8
followed by drying and another treatment of milling in rotating drum
Data Source
Figure 1
AI summary
Leather in form of hides (2) or articles of leather or other articles comprised of similarly behaving material is introduced into rotating drum (1) or stirring vessel or other form of similar device where it undergoes spraying with chemicals and drying to desired humidity to be followed by drying and another treatment of milling in rotating drum (1).