Transfer Drum Label Cutting for Accurate Partial Label Application
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing labelling modules are complex, requiring precise synchronization of multiple components, complicated vacuum systems, and are not flexible for label format changes, necessitating cumbersome adjustments.
Innovation Solution
A labelling module with a simplified architecture that uses a transfer drum with integrated cutting and gluing, eliminating the need for a counterblade roller and allowing for interchangeable receiving sectors and improved web tensioning, enabling flexible adaptation to different label formats without extensive reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If labels are cut from the web after transfer to the drum, then label separation is achieved, but the label stock must be held under tension which causes deformation
Solution Approach 1:
The labels are cut from the web in advance, before being transferred to the drum, while they are still in a relaxed state on the flat bed. This preliminary cutting action prevents the labels from being held under tension during transfer, thereby avoiding deformation and ensuring accurate reproduction of the label's true shape.
2Shape
If labels are cut from the web before transfer, then label deformation is avoided, but the cutting mechanism becomes more complex
Solution Approach 1:
The cutting mechanism is merged with the label transfer process itself. The drum serves dual functions: it transports the labels and simultaneously performs the cutting action as labels pass between the drum surface and the flat bed. This integration eliminates the need for a separate, complex pre-cutting mechanism.
Solution Approach 2:
The system uses its own operational movement to perform the cutting function. As the drum rotates and labels are transferred from the flat bed to the drum surface, the relative motion between the drum and flat bed automatically effects the separation of labels from the web, without requiring additional dedicated cutting apparatus.
3Productivity
If the drum rotates in the direction of label transfer, then labels are transferred efficiently, but labels may be damaged during transfer
Solution Approach 1:
Instead of rotating the drum in the conventional direction of label transfer, the drum rotates in the opposite direction. Labels are fed onto the drum surface while it rotates backward, which reduces the relative velocity and mechanical stress during the transfer process, thereby preventing label damage while maintaining efficient throughput.
Data Source
Figure 1
Figure 2~3A
Figure 3B
AI summary
There is described a labelling module (7) for labelling containers (2) adapted to contain a pourable product, the labelling module (7) comprising: a feed roller (8) for advancing a web (4) of labelling material along a feed path (Q); a cutting member (11) arranged downstream of the feed roller (8), along the feed path (Q), for repeatedly cutting the web (4) thereby separating a sequence of labels (3) therefrom; and a transfer drum (12) rotatable about a rotation axis (X) in an angular direction of rotation (D), and configured to transfer the labels (3) to an application station (A) for the application thereof onto the respective containers (2); the transfer drum (12) comprising a plurality of receiving sectors (13) each configured to cyclically receive and retain a label (3), the receiving sectors (13) including, each, a leading pad (13a) for retaining a leading edge (3a) of the label (3) and a trailing pad (13b; 13b') for retaining a trailing edge (3b) of the label (3); wherein the cutting member (11) is arranged radially adjacent to the transfer drum (12) and is configured for the cutting the web on the drum (12) sequentially at the trailing pads (3b), thereby separating the labels (3) from the web (4) .