In-line Ultrasonic Welding Quality Control for E-cigarette Assemblies
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Solution Overview
Problem
Current systems for controlling the quality of ultrasonic welding in electronic cigarette assembly lines are inefficient and time-consuming, requiring components to be removed from the line for testing, which disrupts the assembly process and is not effective in quickly determining the quality of the weld between the base and support element.
Innovation Solution
A system and method for in-line control of ultrasonic welding that uses a chamber with air supplying and pressure control means to detect air backpressure, indicating the quality of the weld, allowing for real-time verification within the assembly line by comparing detected pressure with a reference value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If control systems are used outside the electronic cigarette assembly line to detect welding quality, then measurement accuracy is improved, but productivity deteriorates due to components being removed and reintroduced
Solution Approach 1:
The patent combines the welding control system directly into the assembly line by integrating the air supply device, chamber, and pressure sensor with the welding apparatus. This merging eliminates the need to remove components for separate testing, thereby maintaining both measurement accuracy and assembly line productivity.
Solution Approach 2:
The patent performs welding quality detection immediately after the welding process within the same assembly line cycle. By incorporating the air pressure testing mechanism as part of the welding station, the system conducts quality verification as a preliminary step before components proceed to subsequent assembly operations, eliminating rework and reintroduction steps.
2Productivity
If in-line control is implemented, then productivity is improved, but device complexity increases due to additional control components
Solution Approach 1:
The air supply device serves multiple functions: it provides air pressure for welding, supplies air for quality detection, and enables rapid testing within the assembly line. This multi-functionality reduces the need for separate dedicated testing equipment, thereby improving productivity without proportionally increasing device complexity.
Solution Approach 2:
The patent introduces air pressure as an intermediary medium to transfer information about welding quality. The air pressure sensor detects welding defects by measuring pressure changes in the air passage, providing a simple and effective detection mechanism that avoids complex electronic sensing systems.
3Productivity
If rapid welding quality detection is implemented, then productivity is improved, but measurement precision may deteriorate due to reduced testing time
Solution Approach 1:
The patent implements periodic air pressure testing at standardized intervals within the assembly line cycle. The air supply device delivers controlled air pressure pulses through the air passage, and the pressure sensor records responses at predetermined time points, ensuring consistent and accurate measurements while maintaining rapid testing 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
Enables faster quality control of ultrasonic welding, reducing verification time to 100-200 milliseconds, allowing seamless integration into the electronic cigarette assembly line and maintaining standard processing times, thereby enhancing productivity.
Implementation Method 1
pressure sensors detecting the air backpressure generated in the chamber after the air introduction
Implementation Method 2
The ultrasonic welding, as is well-known, uses high frequency sound energy to melt together plastic materials at a welding zone
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a system (1) for in-line controlling of the ultrasonic welding of plastic components (F, S, B) of an electronic cigarette, the plastic components (F, S, B) being welded to one another at a welding zone (Z) so as to define a welded group (G); the plastic components (F, S, B) are such that the welded group (G) comprises an air passage duct (P) having a first open end (El) and a second open end (E2) . The system (1) comprises: a chamber (2) for receiving the welded group (G); closure means (3), for closing the first open end (El); air supplying means (6), for supplying air into the chamber (2). The system (1) further comprises: air exiting means (4, 40), connecting the welding zone (Z) with the outside of the chamber (2); continuous pressure control and adjustment means (5) for continuously controlling and regulating the air pressure that enters in the air passage duct (P), in order to keep a fixed air pressure; an air passage nozzle (7), having a predetermined cross section, interposed between the continuous pressure control and adjustment means (5) and the second open end (E2); a pressure sensor (8) for detecting the air back pressure generated in the chamber (2) after the introduction of air into the air passage duct (P).