Stretch Film Edging and Overlap for Pallet Load Security
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Solution Overview
Problem
Existing methods for wrapping palletized loads with stretch film often result in damage or rupture due to high tension and inadequate protection during transport and storage.
Innovation Solution
A method involving the partial overlapping and edging of stretch films from multiple rolls, followed by pre-stretching under different tensions, to create a combined film band that provides enhanced resistance to tearing and puncture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If stretch film is wrapped around the palletized load using high tension to anchor and consolidate products, then the securing effectiveness is improved, but the stretch film may rupture or get damaged
Solution Approach 1:
The stretch film is divided into multiple separate films (first stretch film, second stretch film, third stretch film) that are applied in sequence. Each film carries a portion of the securing load, distributing the tension and preventing any single film from rupturing under excessive stress.
Solution Approach 2:
Multiple stretch films are combined to form a composite wrapping system. The films are applied in layers with different orientations (first film vertically, second film horizontally, third film vertically) creating a composite structure that provides both strength and redundancy against rupture.
2Strength
If multiple stretch films are applied in overlapping layers to increase protection, then the resistance to tearing and puncture is improved, but the device complexity increases
Solution Approach 1:
The wrapping system is segmented into three separate film application mechanisms, each handling a different film. This segmentation allows for independent control and simplification of each individual film application process while achieving composite protection through their combination.
Solution Approach 2:
The patent applies more film than a single layer would provide, using three separate films in overlapping layers. This excessive action (using more material than minimally required) ensures enhanced protection against tearing and puncture by creating redundant barriers.
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 method effectively secures palletized loads by increasing the resistance to tearing and puncture, ensuring better protection during storage and transport by forming robust film bands with varying thicknesses and tensions.
Implementation Method 1
passing the combined stretch film through a pre-stretcher
Data Source
AI summary
A method for securing a palletized load is provided. The method comprises dispensing a first stretch film vertically inserted over a first support member, dispensing a second stretch film having an upper lateral side edge and a lower lateral side edge and being vertically inserted over a second support member, edging at least one of the upper lateral side edge and the lower lateral side edge of the second stretch film to obtain an edged second stretch film, partially overlapping the edged second stretch film and the first stretch film, passing the combined stretch film through a pre-stretcher, and wrapping the combined stretch film around the palletized load. The height of the stretch film can be adjusted using a height adjustment device. A third stretch film can be dispensed and combined with the first and second stretch films.