Movable Cover Bar Deflects Hot Air in Film Shrinking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shrinking devices face challenges in protecting sensitive areas of packed articles during the heat-shrinking process while maintaining the thermodynamic operating state, as adjusting nozzle configurations to reduce air circulation inside the tunnel leads to temperature changes and requires readjustment of heating output.
Innovation Solution
A shrinking device equipped with movable screen strips that can be positioned to block or deflect specific rows of nozzles, allowing for targeted protection of sensitive areas without sealing them tightly, thus maintaining the thermodynamic state by deflecting the shrinking medium upwards or downwards, ensuring optimal exposure and heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If nozzle rows are blocked to protect sensitive areas, then targeted protection of sensitive areas is improved, but air circulation inside the tunnel decreases and temperature drops
Solution Approach 1:
The patent applies local quality by making different parts of the shaft wall have different properties: some nozzle rows are blocked to protect sensitive areas, while other nozzle rows remain open to maintain overall temperature. This selective blocking allows localized protection without compromising the global thermodynamic state.
Solution Approach 2:
The patent segments the nozzle surface into multiple independent nozzle rows that can be individually blocked or left open. This segmentation allows selective protection of specific areas while maintaining air circulation and temperature in other regions, resolving the contradiction between localized protection and global temperature maintenance.
2Manufacturing precision
If nozzle rows are blocked to adapt shrink tunnel to package height, then shrink quality is improved, but air circulation decreases requiring heating readjustment
Solution Approach 1:
The patent applies local quality by selectively blocking specific nozzle rows corresponding to the height of packaged goods, thereby adapting the shrink tunnel to different package sizes without requiring complete reconfiguration. This maintains shrink quality while avoiding the need to readjust heating output.
Solution Approach 2:
The patent implements preliminary action by pre-arranging multiple nozzle rows at different heights before operation. When packages of different heights are processed, the appropriate nozzle rows are simply blocked in advance, eliminating the need for real-time heating readjustment and simplifying operation.
3Manufacturing precision
If interchangeable nozzle plates are used to adjust to package height, then shrink quality is improved, but device complexity and operation time increase
Solution Approach 1:
The patent applies dynamics by making the nozzle configuration adjustable and adaptable to different package heights. Instead of fixed nozzles or complex interchangeable plates, the system dynamically blocks or unblocks specific nozzle rows based on the package being processed, enabling quick adaptation without manual plate changes.
Solution Approach 2:
The patent inverts the conventional approach by instead of changing the physical nozzle structure to adapt to different packages, it blocks or unblocks predefined nozzle rows. This reverse approach simplifies operation while maintaining the ability to achieve optimal shrink quality for different package heights.
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 effectively protects sensitive areas of packed articles by controlling the flow of the shrinking medium, maintaining consistent heating conditions and thermodynamic states within the shrinking device, without the need for frequent readjustments in heating output.
Implementation Method 1
The shrinking medium is guided through the nozzles in a flow direction from the shaft walls into the interior
Implementation Method 2
the direction of flow of the shrinking medium is deflected in this sub-area
Data Source
Figure 1
Figure 2(A)~2(C)
Figure 3(A)~3(B)
AI summary
The shrinking device has a movable cover bar (20) assigned to a nozzle area (6) of a shaft wall (3) with a certain length, where the length of the cover bar corresponds to the former length. The cover bar is associated to an upper edge of the shaft wall in a working position (AP1) and the cover bar is brought into another working position by a vertical movement (BV). The cover bar is upstream and spaced to the nozzle row (8') in the latter working position, so that the flow direction of a shrinking medium (7) flowing in an inner chamber (2') of a shaft (2) is deflected in the nozzle area. An independent claim is included for a method for heat shrinking of a film around an article or article combination in a shrinking device.