Heat-Shrinkable Film Bundle Adhesion Control
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Solution Overview
Problem
Existing methods for creating bundles with heat-shrinkable film result in creases and increased film consumption due to the need for variable heat-shrinking factors and over-edge portion management, leading to handling difficulties and instability.
Innovation Solution
The method involves controlling the arrangement of over-edge portions by making the film adhere to the containers upstream of the heat-shrinking oven using rotating tines, adhesive materials, or electrostatic charging, ensuring a more controlled heat-shrinking process with reduced film consumption and eliminating creases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the film is made to adhere to containers upstream of the heat-shrinking oven using rotating tines or adhesive materials, then film consumption is reduced by 10-35% and creases are eliminated, but the device complexity increases due to additional adhesion mechanisms
Solution Approach 1:
The film is made to adhere to the containers upstream of the heat-shrinking oven, before the actual heat-shrinking process begins. This preliminary adhesion action ensures the film is properly positioned and secured, eliminating the need for excessive film overlap and reducing overall film consumption by 10-35% while preventing crease formation during subsequent handling and heat-shrinking operations.
Solution Approach 2:
Adhesive materials or electrostatic charging mechanisms serve as intermediaries between the film and containers to achieve secure adhesion. These intermediary substances or forces enable the film to stick to the container surfaces without requiring mechanical folding or excessive film material, thus reducing film consumption while maintaining bundle stability.
2Ease of manufacture
If the over-edge portions are simply lifted and directed without folding, then the implementation is easier and film consumption is lower, but creases are generated during heat-shrinking that complicate handling
Solution Approach 1:
The film over-edge portions are made to adhere to the containers upstream of the heat-shrinking oven, before the heat-shrinking process begins. This preliminary adhesion secures the film in place, preventing it from shifting or folding during subsequent operations. As a result, no creases are generated during heat-shrinking, eliminating handling complications while maintaining implementation simplicity.
3Stability of the object's composition
If variable heat-shrinking factors are used for different container dimensions, then the bundle stability is improved, but the film consumption increases and requires more sophisticated film selection
Solution Approach 1:
The film is made to adhere locally to the container surfaces upstream of the heat-shrinking oven, with the adhesion occurring at specific locations where the over-edge portions contact the containers. This localized adhesion ensures proper film positioning and bundle stability for various container dimensions without requiring variable heat-shrinking factors or increased film consumption, as the adhesion mechanism adapts to different container sizes and shapes.
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 reduces film consumption by 10-35% and eliminates creases, enhancing the stability and protection of the bundle while allowing for efficient use of film with near-zero transverse heat-shrinking factor, enabling cost-effective packaging with improved product protection and identification.
Implementation Method 1
supplying the containers and the handled heat-shrinkable film to a heat-treatment device, or rather a ventilated oven, so that the over-edge portions are compacted to the containers by heat-shrinking
Implementation Method 2
making the film adhere to the products already upstream of the heat-shrinking oven
Implementation Method 3
possible use of means for electrostatically charging the film
Data Source
AI summary
Method for making a bundle (10) of the type comprising a plurality of containers (11) positioned along at least one row and wound in a heat-shrunk film (12) due to a heat-treatment effect; said method comprising the steps of: a) arranging a heat-shrinkable film (12) around said containers (11) ordered along at least one row in order to obtain an open tunnel (13) along the transverse direction (20) with respect to the longitudinal direction of advancement (20′), said open tunnel (13) identifying along said transverse direction (20) lateral over-edge portions (14) with respect to said containers (11); b) handling said over-edge portions (14); c) supplying said containers (11) and said heat-shrinkable film (12) to a heat-treatment device, so that said over-edge portions (14) are compacted to said containers for heat-shrinking; in which said step of handling said over-edge portions comprises the step of making said over-edge portions (14) at least partially adhere to said containers (11).