Container Wrapping Web Bonding to Prevent Shrink Distortion
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Solution Overview
Problem
The production of containers with outer packaging often results in wrinkling, distortion, and illegible printed designs due to the shrinking process, especially when using shrink film or printed webs, leading to quality defects.
Innovation Solution
A device and method that apply adhesive to the web material before wrapping, securing it to the container's end faces, preventing distortion during shrinking by using an adhesive application unit integrated into existing folding machines, ensuring minimal film consumption and precise bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the web material is tightened and stretched during wrapping and folding, then the packaging is secured firmly, but the material on the front and back becomes distorted and creases form
Solution Approach 1:
The adhesive is applied to the web material before the wrapping and folding process begins. This preliminary bonding action secures the web material to the container group in advance, preventing distortion and creasing during subsequent tightening and stretching operations while maintaining packaging security
2Strength
If shrink film is used and shrunk to hold containers firmly, then the containers are held securely together, but lateral film overhangs fold over creating shrink eyes with wrinkling
Solution Approach 1:
The adhesive application occurs before the shrinking process, securing the web material's position on the container group in advance. This preliminary bonding prevents the formation of shrink eyes and wrinkling during the shrinking operation while maintaining the firm holding strength of the packaging
3Ease of manufacture
If the web material is stretched during wrapping, then the packaging is tightened properly, but printed designs on the web material become distorted or illegible
Solution Approach 1:
The adhesive is applied to the web material before the stretching and tightening process. This preliminary bonding secures the web material to the container group, allowing proper packaging tightness to be achieved while preventing distortion of printed designs on the web material
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
Prevents distortion of printed designs and minimizes wrinkling by securing the web material to the container before shrinking, resulting in a distortion-free package with a small shrink eye and reduced film usage.
Implementation Method 1
an adhesive application device arranged in the area of the transport path, which is designed for applying adhesive to the inside of the web blank and in the area of the longitudinal side edges of the film blank
Implementation Method 2
In the case of shrink film, the film is then shrunk, so that the containers are held firmly together by the web material
Data Source
Figure 1
Figure 2a~2b
Figure 3a
AI summary
The invention relates to a device and a method for producing a container wrapped with a web material, comprising a container transport device that transports the container through a folding and/or wrapping device, wherein the folding and/or wrapping device includes a wrapping element guided around the container transport device for receiving the web material and wrapping the container with the film, and a cutting station designed for cutting the web material with a transport device for transporting and feeding web blanks onto the container transport device. An adhesive application device is to be arranged in the area of the transport device, which is designed for applying adhesive to the inside of the web blank and in the area of the longitudinal side edges of the web blanks in order to bond the longitudinal side edge of the web blank to the end faces of the containers before the web blank shrinks.