Sealing Temperature Compensation for Consistent Packaging Seams
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Solution Overview
Problem
Existing sealing devices suffer from fluctuations in sealing quality due to temperature differences between temperature sensors and the sealing surface, which are not directly measured, leading to inconsistent seam quality.
Innovation Solution
A control unit adjusts a correction parameter influencing the setpoint temperature of the heating unit based on the operation state of the sealing unit, using a leaky integrator equation or model to compensate for temperature differences and ensure precise temperature adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If temperature sensors are arranged at a distance from the sealing surface due to mechanical constraints, then the sealing device structure is simpler and easier to manufacture, but temperature difference occurs between measurement and sealing surface leading to sealing quality fluctuations
Solution Approach 1:
The control unit continuously receives temperature signals from the sensor and dynamically adjusts the setpoint temperature of the heating unit based on the detected temperature at the sealing surface. This closed-loop feedback mechanism compensates for the spatial offset between sensor and sealing surface, maintaining consistent sealing temperature despite the distance arrangement.
Solution Approach 2:
The system dynamically changes the setpoint temperature parameter of the heating unit based on the detected sealing surface temperature and operational state. By adjusting this parameter in real-time, the system compensates for temperature differences caused by sensor placement distance, ensuring consistent sealing quality.
2Adaptability or versatility
If the sealing unit operates in different modes (sealing mode and idle state), then the sealing device is more versatile and adaptable, but temperature difference varies between modes causing sealing quality fluctuations
Solution Approach 1:
The control unit dynamically adapts the setpoint temperature based on the operational state of the sealing unit. Different dynamic adjustment strategies are applied for sealing mode versus idle state, allowing the system to maintain optimal sealing temperature despite mode transitions and varying thermal conditions.
Solution Approach 2:
The control unit monitors the operational state and uses feedback from the temperature sensor to adjust the heating unit's setpoint temperature accordingly. This ensures that temperature compensation is actively managed during sealing operations while preventing unnecessary heating during idle states, maintaining consistent sealing quality across different modes.
3Manufacturing precision
If automatic adjustment of correction parameter is implemented based on operation state, then sealing temperature precision is improved, but device complexity increases
Solution Approach 1:
The control unit automatically determines the operational state of the sealing unit and self-adjusts the setpoint temperature without external intervention. This self-service capability simplifies the overall control architecture by integrating state detection and temperature adjustment functions within a single control unit, reducing the need for additional complex external control systems.
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 achieves consistent and high-quality sealing by automatically adjusting the sealing temperature, minimizing inferior seams and enhancing sealing precision.
Implementation Method 1
at least one heating unit for generating heat for the at least one sealing unit
Implementation Method 2
temperature difference will occur between the temperature measurement with the temperature sensor and the sealing surface
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention is based on a sealing device (10a; 10b) for sealing a package or a packaging material (12b), comprising: at least one sealing unit (14a; 14b); at least one heating unit (16a; 16b) for generating heat for the at least one sealing unit (14a; 14b); and a control unit (18a) for controlling at least the heating unit (16a; 16b). It is proposed, that the control unit (18a) is configured to automatically adjust a value of a correction parameter that influences the setpoint temperature of the heating unit (16a; 16b) depending on an operation state of the sealing unit (14a; 14b).