Metal Powder Coating Chamber Layout for Cooling and Dust Extraction
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Solution Overview
Problem
Existing metallic coating technologies face inefficiencies in cooling workpieces and removing non-melted metal powder and dust during the coating process, which can affect coating quality and processing time.
Innovation Solution
The solution involves a coating device with an air supply above the workpiece and air discharge below, along with a suction device for targeted powder and dust removal, and the use of multiple application devices for simultaneous coating, allowing for efficient cooling and precise removal of excess material, enabling horizontal or vertical workpiece arrangements for optimized powder usage and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If air supply and air exhaust are positioned conventionally, then cooling function is provided, but unmelted metal powder and dust cannot be effectively removed from the work area
Solution Approach 1:
The air supply and exhaust system is segmented into multiple independently controllable units. Each application device has its own dedicated air supply and exhaust, allowing separate control of airflow for cooling and powder removal functions, thereby effectively removing harmful factors without excessive system complexity
Solution Approach 2:
Airflow characteristics are optimized locally at each application position. The air supply and exhaust are positioned to create localized airflow patterns that simultaneously achieve cooling of the workpiece and removal of metal powder and dust from the specific work area, rather than using a single global airflow system
2Productivity
If multiple application devices are used for simultaneous coating, then processing time is reduced, but coordination and control complexity increases
Solution Approach 1:
Multiple application devices are merged into a single integrated coating system with unified control. The system coordinates multiple nozzles and lasers working simultaneously on different areas of the workpiece, achieving high productivity while managing complexity through integrated design and centralized control
Solution Approach 2:
The multiple application devices enable continuous coating operation without interruption. While one application device is coating a particular area, others simultaneously coat different areas, maintaining continuous productive action across the entire workpiece surface, thereby reducing total processing time
3Manufacturing precision
If workpiece surface is arranged horizontally, then powder application efficiency is improved, but gravity causes powder accumulation issues
Solution Approach 1:
The conventional vertical powder application approach is inverted by positioning the air supply above the workpiece surface and directing airflow downward. This reversed airflow direction counteracts gravity's effect on powder particles, preventing accumulation and improving coating precision while reducing powder loss through more effective powder delivery to the melt zone
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 approach ensures efficient cooling, precise coating, and reduced processing time by creating a defined air flow and effective powder removal, enhancing coating quality and productivity.
Implementation Method 1
a laser for locally melting the metal powder on the workpiece surface to form a coating
Implementation Method 2
air being introduced into and extracted from the working chamber, particularly for cooling purposes
Data Source
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AI summary
The invention relates to a coating device and a method for metallically coating workpieces, comprising a housing enclosing a working chamber, a holding device for holding at least one workpiece in the working chamber, at least one application device with an application nozzle for applying a metal powder to a workpiece surface to be coated and a laser for locally melting the metal powder onto the workpiece surface to form a coating, at least one movement device with which the at least one application device can be moved relative to the workpiece surface during coating, at least one air supply, and at least one air outlet. According to the invention, the air supply is arranged in an upper region of the working chamber above the workpiece, and the air outlet is arranged in a lower region of the working chamber below the workpiece.Furthermore, an extraction system with at least one extraction device is provided, which is located close to the workpiece.