Movable Heating Element for Tube Sealing Quality
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Solution Overview
Problem
Existing packaging machines face challenges in maintaining ideal positioning of heating elements during operation interruptions, leading to non-ideal heating and potential contact issues with the packaging material, which can affect the quality of sealed tubes.
Innovation Solution
A forming unit with a sealing unit that includes a heating element and supporting elements, where the heating element is movable between operating and rest positions to avoid excessive heat application, and supporting elements maintain the packaging material in a predetermined position, ensuring precise heat direction and maintaining sterility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heating element is movable between operating and rest positions to avoid excessive heat application during interruptions, then the sealing quality and sterility are improved, but the device complexity increases
Solution Approach 1:
The heating element is designed to be movable rather than fixed, allowing it to dynamically adjust its position between operating and rest states. This dynamic positioning ensures the heating element is interposed between overlapping lateral portions during normal operation for proper sealing, and moved away during interruptions to prevent excessive heat application and maintain sterility, thereby resolving the contradiction between sealing quality and device complexity
Solution Approach 2:
The system performs preliminary positioning of the heating element to the rest position before resuming operation after an interruption. This preliminary action prevents the heating element from being in a non-ideal position or contacting the web when advancement is resumed, ensuring sealing quality is maintained without requiring complex real-time monitoring and adjustment mechanisms
2Object-affected harmful factors
If the heating element is moved to the rest position during interruptions, then overheating is prevented, but the risk of mechanical positioning errors or contact with packaging material increases
Solution Approach 1:
A supporting device acts as an intermediary between the heating element and the web of packaging material during interruptions. This supporting device maintains the web in a predetermined position, serving as a buffer that prevents direct contact between the heating element and the packaging material even if positioning errors occur, thereby preventing overheating while mitigating positioning accuracy risks
Solution Approach 2:
The supporting device is positioned in advance to cushion and maintain the web position before the heating element moves to the rest position. This preliminary cushioning arrangement ensures that even if the heating element does not position perfectly, the web is already supported in a safe position, preventing harmful contact and overheating
3Temperature
If the heating element and supporting devices are movable between operating and rest positions, then heat application control is improved, but the ease of operation decreases due to coordination requirements
Solution Approach 1:
The heating element and supporting devices are merged into a single movable assembly that moves together between operating and rest positions. This combination ensures that both components are coordinated automatically through their mechanical coupling, improving temperature control during interruptions while eliminating the need for separate control mechanisms, thereby maintaining ease of operation
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 solution ensures consistent and efficient sealing of packaging tubes by preventing overheating and maintaining sterility during operation interruptions, improving the overall quality and reliability of sealed packages.
Implementation Method 1
comprises a heating device and a number of supporting devices, at least partially connected to the heating device, and realized to contact and maintain in a predetermined position at least part of the web of packaging material
Data Source
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AI summary
It is described a forming unit (9) for folding a web (4) of packaging material into a tube (10) and superimpose a first lateral portion (4A) of the web (4) of packaging material to a second lateral portion (4B) of the web (4) of packaging material with a number of forming devices (12) placed along a conveying path (P) in succession; wherein each forming device (12) comprises a respective forming ring (13) surrounding the web (4) of packaging material being folded; and a number of supporting elements (18) configured to contact and maintain in a predetermined position said first and/or the second lateral portion (4A, 4B), wherein the number of supporting elements (18) are arranged in a fixed position with respect to the forming devices (12).