Motorized Crucible Cleaning Device for Intermetallic Removal
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Solution Overview
Problem
Manual cleaning of crucibles in soldering operations is inefficient, non-uniform, and hazardous, leading to degraded wettability and quality of solders due to the formation of a rough intermetallic compound layer, which requires frequent interruptions and exposes operators to health risks.
Innovation Solution
A motorized cleaning device with cylindrical brushes, a vacuum system, and an automated application of cleaning products ensures uniform and safe removal of the intermetallic compound layer, protecting operators and maintaining crucible wettability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual cleaning is used to remove intermetallic compound layer, then operator flexibility is maintained, but cleaning uniformity and reliability deteriorate
Solution Approach 1:
The patent replaces the manual mechanical brushing system with an automated mechanical brushing system. A motor drives a rotating brush that automatically contacts and rotates against the crucible surface, eliminating human variability while maintaining effective mechanical cleaning action. This substitution ensures consistent cleaning uniformity across all crucibles without sacrificing operational effectiveness.
2Productivity
If manual cleaning with alcohol-based cleaner is used, then cleaning effectiveness is achieved, but operator health safety deteriorates
Solution Approach 1:
The patent extracts and eliminates the harmful alcohol-based cleaning product from the cleaning process. Instead of using chemical cleaners that expose operators to health risks, the invention employs purely mechanical brushing action to remove the intermetallic compound layer. This extraction of the harmful chemical agent maintains cleaning effectiveness while eliminating operator exposure to toxic substances.
3Reliability
If frequent manual cleaning interruptions are implemented, then crucible wettability is maintained, but production productivity deteriorates
Solution Approach 1:
The patent enables continuous automated cleaning operations that can be integrated into the production flow without interruptions. The automated brush system is designed to quickly clean multiple crucibles in sequence, maintaining crucible wettability through consistent, rapid cleaning cycles that do not require production stoppages. This continuous action maintains reliability while preserving production productivity.
4Reliability
If automated motorized brushing is implemented, then cleaning uniformity is improved, but device complexity increases
Solution Approach 1:
The patent segments the cleaning system into distinct functional modules: a motor unit, a brush assembly, and a crucible positioning system. This segmentation allows each component to be independently optimized and maintained, reducing overall system complexity while achieving reliable automated cleaning uniformity. The modular design makes the complex system manageable and easier to implement.
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
The motorized cleaning device automates the brushing process, ensuring consistent and rapid removal of the intermetallic compound layer, reducing operator exposure to hazards, and maintaining the quality of solders by maintaining crucible wettability.
Implementation Method 1
a first metallic brush (58) to remove the superficial layer of intermetallic compound during a brushing operation of the crucible
Implementation Method 2
the cleaning device comprises a vacuum cleaner which is arranged close to the first brush so as to suck up the dust likely to be produced by the brushing operation
Data Source
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AI summary
The device (48) comprises a first metal cylindrical brush (58) to remove the surface layer of intermetallic compound during an operation of brushing the surface of a crucible, a vacuum arranged near the first brush to aspirate the dust produced by brushing operation, means for automatically applying a cleaning product on the surface of the crucible before the passage of the first brush, a transverse sponge arranged longitudinally ahead of the first brush and intended to be impregnated with the cleaning product, and a second brush (60). The device (48) comprises a first metal cylindrical brush (58) to remove the surface layer of intermetallic compound during an operation of brushing the surface of a crucible, a vacuum arranged near the first brush to aspirate the dust produced by brushing operation, means for automatically applying a cleaning product on the surface of the crucible before the passage of the first brush, a transverse sponge arranged longitudinally ahead of the first brush and intended to be impregnated with the cleaning product, and a second brush (60) with metal cylinder at the back that is rotating parallel to the first brush ahead by a motor (64). The crucible comprises a horizontal concave upper surface, which is intended to contain a molten feeding metal capable of forming a surface layer intermetallic compound on the surface of the crucible. The first brush is rotating around a transverse axis (A) in a frame, by the motor to automate the brushing operation. The frame comprises an upper cover. The frame is carried by a movable carriage along a longitudinal direction to allow the passage of back to front of the first brush above the concave surface of the crucible. The second brush turns in a direction opposite to the direction of rotation of the first brush. The first and second brushes are rotated by the common motor. The first brush has a width for cleaning all crucibles in one stroke.