Rotational Locking Guide Units for Stretch Sleeve Labeling
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Solution Overview
Problem
Existing labeling devices struggle to maintain the rotational position of containers accurately, especially when labeling non-rotationally symmetrical bottles, due to vibrations and centrifugal forces, which can lead to misalignment during the labeling process.
Innovation Solution
The device incorporates guide units with locking and guiding positions that secure the rotational position of containers using friction and form fits, adjustable guide elements, and rollers to prevent twisting, ensuring precise alignment and stabilization during the labeling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If containers are transported on a labeling wheel without rotational locking, then the labeling device can operate continuously, but the rotational position of containers changes due to vibrations and centrifugal forces, causing misalignment
Solution Approach 1:
The labeling device is divided into multiple labeling stations arranged around the labeling wheel, with each station having its own guide units. This segmentation allows rotational locking to be applied locally at each station without requiring the entire wheel to be locked, maintaining operational continuity while ensuring positional accuracy at each labeling point.
Solution Approach 2:
Guide units act as intermediary elements between the labeling wheel and the containers. These guide units include guide elements that extend into the labeling area and can be adjusted radially, providing rotational locking and lateral guidance without directly constraining the labeling wheel's rotation, thus isolating the containers from vibrations and centrifugal forces.
2Manufacturing precision
If guide units are closed tightly around containers for rotational locking, then rotational position is maintained accurately, but lateral guidance during lifting becomes restricted
Solution Approach 1:
The guide units are designed with dynamic adjustability, allowing the guide elements to be positioned radially outward during container lifting to provide lateral guidance, and then adjusted radially inward to engage with container walls for rotational locking. This dynamic repositioning enables the same guide unit to perform both functions sequentially without conflict.
Solution Approach 2:
The guide units are divided into multiple guide elements that can be independently adjusted. Some guide elements can be positioned to facilitate lateral guidance during lifting, while others can be adjusted to provide rotational locking. This segmentation allows different parts of the guide unit to perform different functions simultaneously or sequentially.
3Adaptability or versatility
If fixed guide elements are used for rotational locking, then the structure is simple, but the device cannot adapt to containers with different dimensions and cross-sections
Solution Approach 1:
The guide elements are designed to be adjustable in position, allowing them to be moved radially and positioned at different locations around the labeling wheel. This adjustability enables the same guide unit to accommodate containers of different dimensions and cross-sections by reconfiguring the guide element positions to match the specific container geometry.
Solution Approach 2:
The guide units are designed as universal components that can handle multiple container types through adjustment. The same guide unit structure can be configured to work with various container shapes and sizes by adjusting the position and orientation of the guide elements, eliminating the need for multiple dedicated guide units for different container types.
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 solution reliably maintains the rotational position of containers throughout the labeling process, reducing misalignment and ensuring accurate labeling, even for containers with non-rotationally symmetrical cross-sections, by using guide units with adjustable elements and rollers that adapt to different container shapes and sizes.
Implementation Method 1
the rotational position of the containers is locked by a friction fit and/or a form fit between the guide units and the side wall of the containers
Implementation Method 2
the rotational position of the containers is locked by a friction fit and/or a form fit between the guide units and the side wall of the containers
Implementation Method 3
with a positive and/or frictional connection acting in the circumferential direction relative to the side wall being able to be produced between the rollers and the side wall of the container
Implementation Method 4
with a positive and/or frictional connection acting in the circumferential direction relative to the side wall being able to be produced between the rollers and the side wall of the container
Data Source
Figure 1I~1VI
Figure 2
Figure 3
AI summary
The device has spreading units (6) for spreading label cases, and lifting units (7) for lifting container to upstand in spread label cases. Guide units (8) are close to the container standing on the lifting unit for lateral guidance of the container while lifting. The guide units are formed for locking rotational position of the standing container to the lifting units. An extensive air gap (14) i.e. 1 mm width air gap, is provided between the guide units and a side wall (2a) of the container. An independent claim is also included for a method for labeling containers.