Aerosol Container Sealing Measurement Automation
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Solution Overview
Problem
Existing manual measurement devices for aerosol container sealing deformation are not suitable for automated systems, leading to potential leaks, safety issues, and inefficiencies in production lines, as they cannot accurately measure the continuous deformation around the perimeter of the container.
Innovation Solution
A method and device for continuous measurement of the deformation between the aerosol container dome and valve holder cup on a production line, using a measuring head that aligns axially, centers, and takes measurements simultaneously around the circumference using mechanical, optical, or electronic means, ensuring 100% perimeter coverage and real-time data transfer for quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual measurement devices are used to measure deformation of the join between dome and valve holder cup, then measurement capability is provided, but automation and production speed compatibility are lost
Solution Approach 1:
The patent replaces manual mechanical measurement devices with an automated measurement system that uses mechanical probes actuated by a pneumatic or electronic system. The measuring head is automatically positioned and actuated, eliminating manual operation while maintaining mechanical measurement capability. This allows the system to operate at production line speeds of around 200 units/minute.
Solution Approach 2:
The measurement system is pre-positioned and pre-configured before production begins. The measuring head is automatically moved into position and the measurement sequence is pre-programmed, allowing measurements to be taken without interrupting the production flow. This preliminary preparation enables the system to keep up with high production speeds.
2Measurement precision
If single-point measurement is performed, then measurement simplicity is maintained, but measurement accuracy and reliability of sealing are compromised
Solution Approach 1:
The measurement system divides the measurement task into multiple segments by using several measuring probes that measure different points around the circumference of the join between the dome and valve holder cup. Each probe measures deformation at its specific location, and the results are combined to provide a comprehensive assessment of the sealing quality. This segmentation approach maintains measurement accuracy while managing system complexity through modular probe design.
Solution Approach 2:
The system transitions from single-point measurement to multi-point circumferential measurement by adding the dimensional aspect of around the perimeter of the join. Multiple probes are positioned at different angular positions around the cup-dome join, measuring deformation in the radial direction. This dimensional expansion provides comprehensive measurement coverage while the probes share a common actuation mechanism, controlling the increase in complexity.
3Reliability
If measurement is taken after container is filled with product, then real sealing condition is measured, but safety risks and measurement difficulties increase
Solution Approach 1:
The measurement is performed before the container is filled with pressurized product, but after the valve holder cup is crimped to the dome. This preliminary measurement captures the sealing quality under controlled conditions without the safety risks of measuring a full, pressurized container. The measurement system is calibrated to provide accurate readings that predict sealing performance under final service conditions.
Solution Approach 2:
The measurement system is designed to measure deformation as a proxy for sealing quality, providing an early indication of potential sealing issues before they result in leaks or safety problems. By measuring the degree of deformation and its uniformity around the circumference, the system cushions against future failures by identifying and rejecting defective containers before they are filled and pressurized.
Data Source
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AI summary
The method comprises the following steps: aligning a measuring head with an aerosol container, without relative speed between the two, lowering and centring the head; lowering a measuring device and taking the corresponding measurement at different points of the perimeter of the opening; rotating the measuring device in relation to the container; removing the head, transmitting the data, and removing the unsuitable containers. The device comprises: a head support having axial movement means; a centring element; a support for the measuring means, said device also including an assembly of measuring arms provided with probes according to the preferred embodiment, means for returning to a rest position, at least one measurement reader, and a means of rotating the measuring device or head.