Vacuum Drum Labeling Device for High-Speed Container Lines
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Solution Overview
Problem
High-speed container treatment devices with throughputs of at least 10,000 containers per hour face challenges in labeling efficiency due to the inability to rapidly stop and start components like the rotating vacuum drum and glue roller, leading to increased label consumption and cleaning efforts when a container is missing from the transport station.
Innovation Solution
A labeling device with a vacuum drum that generates vacuum via a second sector, allowing for controlled label management through a container detection system, which prevents label ejection when a container is missing by keeping the label attached to the vacuum drum until the next rotation, and adjusts the glue application accordingly to avoid re-coating already glued labels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the labeling device operates at high speed (throughput of at least 10,000 containers per hour), then productivity is improved, but the ability to rapidly stop and start components like the rotating vacuum drum and glue roller deteriorates due to large masses and moments of inertia
Solution Approach 1:
The vacuum drum is divided into multiple vacuum chambers (first vacuum chamber, second vacuum chamber, third vacuum chamber) that can be independently controlled. This segmentation allows selective activation of vacuum in specific chambers, enabling the system to handle missing containers without requiring complete system stops, thus maintaining high productivity while improving adaptability.
Solution Approach 2:
The system dynamically adjusts vacuum activation based on container presence detection. When a container is detected as missing, the control unit dynamically switches off vacuum supply to corresponding vacuum chambers, allowing the drum to continue rotating without interruption while preventing label application to empty positions.
2Loss of substance
If components are moved from working position to standby position and back to remove a single missing label, then label waste is reduced, but the time required for such operations increases beyond what is available in high-speed systems
Solution Approach 1:
The system performs preliminary detection of missing containers using detection devices positioned before the labeling point. When a missing container is detected, the control unit proactively deactivates vacuum supply to the corresponding vacuum chamber, preventing label pickup in advance. This preliminary action eliminates the need for subsequent stop-and-start operations to remove misplaced labels.
Solution Approach 2:
The system implements a feedback mechanism where detection devices continuously monitor container presence and provide real-time information to the control unit. The control unit responds by adjusting vacuum chamber activation accordingly, creating a closed-loop system that automatically prevents label waste without manual intervention or system interruptions.
3Productivity
If the vacuum drum continues rotating without stopping when a container is missing, then productivity is maintained, but labels may be incorrectly applied to empty transport positions
Solution Approach 1:
Detection devices provide continuous feedback on container presence at each transport position. The control unit uses this feedback to selectively activate or deactivate vacuum supply to specific vacuum chambers, ensuring labels are only picked up when containers are present, thus maintaining both continuous operation and precise label placement.
Solution Approach 2:
Different vacuum chambers are independently controlled based on local container presence conditions. Each vacuum chamber's vacuum supply is adjusted according to whether a container is present at its corresponding transport position, allowing the system to maintain high productivity while ensuring precise label placement only where needed.
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
Enables continuous operation of the labeling device without interrupting the container treatment process, reducing label waste and cleaning efforts, while maintaining high throughput by ensuring labels are applied correctly even when containers are absent from transport stations.
Implementation Method 1
The vacuum drum has equidistantly arranged picking positions around its circumference for the individual labels. These picking positions feature, for example, vacuum pads to secure the labels to a suction surface using a vacuum.
Implementation Method 2
The vacuum device serves to generate a vacuum at the receiving stations via a first sector of the vacuum drum
Implementation Method 3
This device coats the back of the labels, either partially or completely, with an adhesive after they have been picked up in the receiving stations, before the labels are applied to the containers
Data Source
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AI summary
The invention relates to a labelling device (10) for a container treatment device, said labelling device (10) containing a label supply (16) for supplying individual labels, a rotating vacuum drum (12) with receiving sites (14) for the labels (24) arranged on the periphery, and a vacuum device (28,36-50; 28, 36, 60-64), said vacuum drum (12) comprising a receiving area (22) for receiving the labels (24) from the label supply (16) and a dispensing area (26) designed to be arranged in the movement path of a transport device (32) of the container treatment device, in order to transfer the label, in the dispensing area (26), to the periphery of a container (34) in the transport device (32), the receiving sites (14) of the vacuum drum (12) being connected to the vacuum device, the vacuum device (28,36-50; 28, 36, 60-64) being designed to produce a vacuum on the receiving sites (14) over a first section (A) of the vacuum drum (12), which extends, in the rotational direction of the vacuum drum (12), from the receiving area (22) to the dispensing area (26) of the vacuum drum (12). The invention is characterised in that the vaccum device (28,36-50; 28, 36, 60-64) is designed to produce a vacuum on the receiving sites (14) over a second section (B) of the vacuum drum (12), which extends, in the rotational direction of the vacuum drum (12), from the dispensing area (26) to the receiving area (22), the label supply (16) of the labelling device (10) being controllable according to the signal of a container identification device of the container treatment device for defective containers (34).