Label Gluing and Joint Cutting for Tablet Packaging
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Solution Overview
Problem
Existing packaging machines for small tablets, such as chocolate Napolitains, require time-consuming offsetting of aluminium foil and label alignment due to poor adhesion of glue to aluminium foil, leading to slower production speeds.
Innovation Solution
Gluing loose labels to a substrate at short distances or overlapping them, then cutting the substrate and labels jointly to eliminate the need for offsetting, ensuring the label and substrate are securely attached before cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate labels are glued to a substrate with offset alignment, then the packaging can be properly closed with label protruding beyond substrate, but the foil and label must be shifted to offset them relative to each other which takes time and reduces production speed
Solution Approach 1:
The label is glued to the substrate in advance at the same position where it will be cut, eliminating the need for subsequent offsetting operations. This preliminary positioning allows the cutting knife to cut both the substrate and label together in one action, significantly reducing production time while ensuring the label protrudes sufficiently for proper packaging closure.
2Productivity
If the label is glued only to the substrate at the same position, then cutting can be done jointly without offsetting, but the label must protrude beyond the substrate to enable proper gluing and closure
Solution Approach 1:
The label is designed with different functional zones: a first portion that protrudes beyond the substrate edge to provide sufficient gluing area for closure, and a second portion that overlaps with the substrate for secure attachment. This local differentiation of label regions ensures both high production speed through joint cutting and adequate precision for proper packaging closure.
3Ease of manufacture
If glue is applied to aluminium foil, then labels can be attached to the substrate, but most glues have poor adhesion to aluminium foil
Solution Approach 1:
A layer of adhesive is applied to the substrate (aluminium foil or coated paper) to serve as an intermediary between the substrate and the label. This adhesive layer compensates for the poor natural adhesion of glue to aluminium foil, ensuring reliable label attachment while maintaining ease of manufacture through a straightforward gluing process.
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 method allows for faster packaging by eliminating the need for label and substrate alignment, reducing the risk of label detachment, and enabling higher production speeds without glue drying restrictions.
Implementation Method 1
most glues have poor adhesion to aluminium foil
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
In a method and apparatus for producing a packaging for tablets, a label (2) is placed on and glued to a substrate (2), with the substrate being unwound from a reel (5) and cut to form a packaging. A means (6) for placing and gluing loose labels (2) is used.