Ultrasonic Sealing Gap Control via Electrical Feedback
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Solution Overview
Problem
Existing ultrasonic packaging material processing devices face challenges in maintaining a consistent sealing gap, especially under temperature fluctuations, which affects the quality of the sealed seam.
Innovation Solution
The device regulates the sealing gap using electrical variables from a generator control system, eliminating the need for additional sensors and ensuring parallel alignment of sealing rollers through touch detection and adjustable mechanisms, allowing for precise control of the sealing gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensors and complex regulation systems are used to maintain sealing gap, then measurement precision improves, but device complexity increases
Solution Approach 1:
The generator control system automatically regulates the sealing gap by utilizing its own electrical output variables (power, frequency) as feedback signals. The system self-adjusts the sonotrode position via the adjustment device without requiring external sensors or separate measurement systems, making the regulation system serve itself.
Solution Approach 2:
The generator control system performs multiple functions: it generates ultrasonic energy for sealing, measures the sealing gap through electrical variable monitoring, and automatically adjusts the sonotrode position. This multi-functionality eliminates the need for separate dedicated measurement and control components.
2Measurement precision
If separate force sensors are used to measure sealing gap, then measurement precision improves, but device complexity increases
Solution Approach 1:
The generator control system automatically regulates the sealing gap by utilizing its own electrical output variables (power, frequency) as feedback signals. The system self-adjusts the sonotrode position via the adjustment device without requiring external sensors or separate measurement systems, making the regulation system serve itself.
Solution Approach 2:
The patent replaces mechanical force sensors with an electrical measurement approach. By monitoring electrical variables (power, frequency) from the generator that are directly influenced by the sealing gap, the system substitutes mechanical measurement with electrical field-based measurement, simplifying the device.
3Measurement precision
If touch detection is used to detect sealing roller contact, then measurement precision improves, but device complexity increases
Solution Approach 1:
The generator control system automatically regulates the sealing gap by utilizing its own electrical output variables (power, frequency) as feedback signals. The system self-adjusts the sonotrode position via the adjustment device without requiring external sensors or separate measurement systems, making the regulation system serve itself.
Solution Approach 2:
The electrical variables (power, frequency) from the generator act as intermediaries that indirectly indicate the sealing gap status. Instead of directly measuring physical distance or force, the system uses these electrical parameters as mediators to infer gap conditions and trigger appropriate adjustments.
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 maintains a uniform sealing gap, ensuring consistent seam quality and reliability across temperature variations without requiring separate force sensors, and allows for automatic adjustment of the sealing rollers.
Implementation Method 1
a generator (70) which makes high-frequency electrical energy available to a converter (74) for generating mechanical ultrasonic vibrations, which in turn acts on the sonotrode (10) accordingly
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A device and a method is proposed whereupon the device for processing a packing material using ultrasound comprises the following elements: at least one sonotrode (10), at least one anvil (12), whereupon a gap is constructed between sonotrode (10) and anvil (12) through which the packing material can be passed for the purpose of ultrasonically sealing a packing material, at least one adjustment means (50) that adjusts the gap (s) between sonotrode (10) and anvil (12), at least one generator (70) that changes an input voltage into an output voltage, which a converter (74) transforms into mechanical oscillations in order to generate ultrasonic oscillations on the sonotrode (10), whereupon a regulation device and/or control device (78) is arranged to regulate or control the gap (s) between sonotrode (10) and anvil (12) depending on at least one electric variable (P,E,R) that acts on the sonotrode (10).