Centralized Heating System for Rotary Airbrush Coating
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Solution Overview
Problem
Traditional pneumatic spray coating systems using compressed air at low temperatures result in non-uniform coating layers, high waste, and inefficiencies due to the need for multiple heating systems for each airbrush in rotary turntable systems, leading to suboptimal quality and increased costs.
Innovation Solution
A coating system that uses a single heating and filtering system to deliver hot air through insulated conduits to multiple airbrushes, reducing air pressure and viscosity, and optimizing coating application with a computerized control unit for temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If compressed air is used at low temperatures from traditional feed lines, then the system is simple and costs are low, but the coating layer becomes non-uniform and quality deteriorates
Solution Approach 1:
The patent merges multiple heating systems into a single centralized heating unit that supplies heated air to all airbrushes through a common insulated conduit network. This consolidation maintains coating quality while reducing system complexity and cost compared to individual heating systems for each airbrush.
Solution Approach 2:
The single heating system serves multiple airbrushes simultaneously, making the heating apparatus universal and multi-functional. This approach eliminates the need for separate heating systems for each airbrush while maintaining consistent temperature across all spray points.
2Temperature
If multiple individual heating systems are installed for each airbrush in rotary turntable systems, then each airbrush receives heated air, but the device complexity and costs increase significantly
Solution Approach 1:
The patent consolidates multiple individual heating systems into a single centralized heating unit that distributes heated air to all airbrushes through insulated conduits. This merging approach maintains the necessary temperature for all airbrushes while dramatically reducing device complexity from multiple heating units to one.
3Productivity
If compressed air flow rate is increased to compensate for low temperature effects, then coating application speed improves, but material waste increases due to over-spray
Solution Approach 1:
The patent changes the temperature parameter of the compressed air from cold to heated (e.g., from 20°C to 50-80°C). This parameter change allows for reduced air flow rates while maintaining effective coating application, thereby reducing over-spray and material waste while preserving productivity.
4Manufacturing precision
If pressure of working air is dramatically increased to prevent orange peel effect, then coating uniformity improves, but transfer index decreases and material waste reaches 50%
Solution Approach 1:
The patent changes the temperature parameter of the working air, heating it to 50-80°C. This temperature parameter change allows for maintaining coating uniformity without needing to dramatically increase pressure, thereby preventing the orange peel effect while keeping transfer index high and material waste low.
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
Significantly reduces material waste, improves coating uniformity, and increases the transfer index to 90%, achieving higher quality and productivity compared to traditional cold air systems.
Implementation Method 1
The airbrushes are supplied with working air which has been heated and filtered by a single system
Implementation Method 2
Such heated working fluid is introduced through an insulated conduit which is located on the supporting part of the rotating turntable
Implementation Method 3
The invention further sets out to lower the viscosity of the coating through the exchange that takes place when the product is split up with the heated atomisation working air
Data Source
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AI summary
A coating system (10) comprising a conveyor belt (11) adapted to move the articles subject to coating along a substantially horizontal advancement direction towards a drying oven (12), a rotary turntable (13) comprising a plurality of guns (14) for spraying the coating, said guns (14) being mounted along the outer circumference of the turntable (13) and positioned on the end of conduits coming from a compressed air line (16), said system comprising a device (20) provided with means for heating, filtering and dehumidifying the working air that is introduced into the guns (14).