Shrink Tunnel Flap Dynamics for Thermal Energy Loss Reduction
Solution Overview
Problem
Existing shrink tunnel systems for thermoplastic packaging materials experience significant energy losses at entry and exit areas due to inefficient heat management and structural design, leading to increased energy consumption and operational inefficiencies.
Innovation Solution
The system incorporates adjustable flaps and shaft walls within the tunnel housing to dynamically control the opening cross-section, allowing for optimized thermal energy usage and reduced thermal losses by pivoting flaps to adjust the opening size and using temperature-controlled fluid flows through multiple openings, while preventing articles from getting stuck between shaft walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the shrink tunnel operates with fixed open openings at entry and exit, then articles can be easily loaded and unloaded, but significant thermal energy is lost through the openings
Solution Approach 1:
The patent applies dynamic closure means (flaps or doors) that can automatically open when articles are being loaded or unloaded, and automatically close when the openings are not in use. This dynamic behavior allows the system to adapt between two states: open for easy operation during loading/unloading, and closed for minimal thermal energy loss during operation.
2Loss of energy
If the opening cross-section is large, then articles can pass through easily, but thermal energy escapes more readily
Solution Approach 1:
The closure means are designed to open to a specific degree that allows articles to pass through during loading and unloading operations, then close completely or partially during the shrinking process. This dynamic adjustment optimizes both productivity during material handling and energy retention during the actual shrinking operation.
3Loss of energy
If fixed closure means are used at openings, then thermal energy loss is reduced, but articles may get stuck between the closure means and shaft walls
Solution Approach 1:
The closure means are designed with dynamic positioning capability that allows them to be retracted or positioned away from the shaft walls when articles are being loaded or passed through, eliminating the risk of articles getting stuck. During operation when energy conservation is priority, the closure means can be positioned to minimize gaps and reduce thermal energy loss.
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 design significantly reduces energy losses and enhances operational efficiency by dynamically adjusting the opening cross-section and preventing articles from getting stuck, thereby minimizing heat escape and improving the overall energy usage during the shrinking process.
Implementation Method 1
one or more means for introducing thermal energy into the tunnel housing for shrinking the thermoplastic packaging material onto the articles or assemblies of articles
Implementation Method 2
at least one flap which can be pivoted inwards with respect to the tunnel housing and outwards with respect to the tunnel housing to increase and decrease an opening cross section of the respective opening
Data Source
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AI summary
A device (1) and a method for shrinking sheet-like thermoplastic packaging materials into articles (3) or assemblies of articles are disclosed. The device (1) comprises a tunnel housing (5) with two openings through which the articles (3) or assemblies of articles with their respective thermoplastic packaging material can enter and exit the tunnel housing (5). The device (1) further comprises a transport device (7) which provides a horizontal transport plane (30) for moving the articles (3) or assemblies of articles with their respective thermoplastic packaging material through the tunnel housing (5). Heat energy is introduced into the tunnel housing (5). The cross-sectional area of at least one of the openings can be enlarged and reduced.The at least one device has at least one flap (4) positioned in the area of the respective opening and arranged at least partially in the tunnel housing (5), which is pivotable about an axis (20) oriented at an angle and preferably perpendicular to the horizontal transport plane (30) in the direction towards the tunnel housing (5) and in the direction towards the outside in order to enlarge and reduce the opening cross-section of the respective opening.