Shrinking Device Suction Panel Airflow Control
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Solution Overview
Problem
Existing shrinking devices face challenges in optimizing air suction from the interior, particularly for single-track and multi-track transport systems, which can lead to poor shrinkage results due to air being sucked into the shrink film, causing it to be blown away.
Innovation Solution
A shrinking device with at least two outer shaft walls and an inner shaft wall, featuring a suction device with a suction panel that extends above the transport section and has perforations, allowing air to be sucked in from areas between the housing and the outer shaft walls, reducing the risk of shrink film being blown and improving the shrinking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If air is continuously supplied to the heating device for burning fuel and heating, then the shrinking process can be maintained, but air must be removed from the interior of the shrinking device which can cause shrink film to be blown away
Solution Approach 1:
The suction device is equipped with a suction panel that has different regions: a first region above the transport section and a second region above the shaft walls. By creating different suction characteristics in these regions, air is drawn from areas between the housing and shaft walls rather than directly from above the shrink film, preventing the film from being blown away while maintaining the heating process.
Solution Approach 2:
The suction panel acts as an intermediary structure that redirects the air flow path. Instead of air being sucked directly from above the shrink film, the panel creates a flow path that draws air from the side regions between the housing and shaft walls, thus mediating between the need for continuous air supply and the need to protect the shrink film.
2Quantity of substance
If air is sucked from the interior of the shrinking device, then air can be removed for heating, but the shrink film may be blown away due to direct suction force
Solution Approach 1:
The suction panel creates different local suction zones: the first region above the transport section provides one type of suction, while the second region above the shaft walls provides another type. This local differentiation allows air to be drawn from safe zones (between housing and shaft walls) while protecting the shrink film in the transport section from direct suction forces.
Solution Approach 2:
The suction panel extends in the transverse direction beyond the shaft walls, creating a three-dimensional flow path that redirects air from above the shrink film to the side regions. This dimensional extension allows the suction force to be applied in a different spatial direction, drawing air from areas where it cannot directly affect the shrink film.
3Manufacturing precision
If shaft walls are used to apply hot air to articles from all sides, then uniform shrinking can be achieved, but air suction becomes more complex due to multiple openings and flow paths
Solution Approach 1:
The suction panel serves multiple functions simultaneously: it acts as a flow distributor, a flow director, and a protective barrier. By integrating these functions into a single component, the system achieves uniform air distribution and shrinkage while simplifying the overall suction system design, avoiding the need for multiple separate openings and flow control devices.
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
The solution ensures even and reproducible shrinkage results by directing air suction away from the shrink film, preventing it from being blown and enhancing the application of hot shrinking agent uniformly around articles, suitable for both single-lane and multi-lane processing.
Implementation Method 1
a suction device (10) for sucking in air from an interior (16) of the shrinking device (1). The suction device (10) has a suction panel (22) with perforations (24)
Implementation Method 2
The shrinking agent is provided, for example, by a hot gas or shrinking gas heater, which comprises a heating device that is operated electrically or by means of a fuel
Implementation Method 3
The shrink film is shrunk around the articles in a shrink tunnel by supplying shrinking means, for example hot air
Data Source
Figure 1~2
Figure 3A~3D
Figure 3E~3G
AI summary
The invention relates to a shrinking device (1) for heat-shrinking shrink film (5) around articles or article assemblies (3) and a method for drawing air (9) from an interior (16) of such a shrinking device (1). The shrinking device (1) comprises at least one interior (16) with a transport section for transporting the articles or article assemblies (3) wrapped with shrink film (5) in a transport direction (TR). The shrinking device (1) has at least two outer shaft walls (13), each with an outlet surface (17) facing the transport section, through which hot air (8) can be directed laterally into the interior (16) of the shrinking device (1) onto the articles or article assemblies (3) wrapped with shrink film (5).Furthermore, the shrinking device (1) comprises at least one intake device (10) for drawing air (9) from the interior (16) of the shrinking device; wherein the intake device (10) comprises at least one intake opening (20) arranged above the transport section and above the at least two outer shaft walls (14), wherein at least one intake baffle (22) is arranged above the transport section and the intake opening (20). The intake baffle (22) extends substantially over a width (B22) that is greater than the width (B20) of the intake opening (20).