Heat Shrink Sleeve Ejection for Tapering Containers
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Solution Overview
Problem
Existing container sleeving methods are inefficient and unreliable, particularly for high-speed labeling and handling of flexible or tapering containers, as they require complex machinery and are not suitable for thin or flexible sleeves and containers with conical shapes.
Innovation Solution
A method and system that ejects heat shrinkable sleeves from a mandrel unit upwardly against gravity to quickly and reliably arrange them around containers, using kinetic energy and optional auxiliary guidance to ensure proper positioning, allowing for continuous high-speed operation with flexible sleeves and various container shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical means grip the sleeve at the bottom end and push it upwards using a rod, then the sleeve can be moved over the container, but the sleeve material needs to be relatively thick and inflexible, making the method unsuitable for thin and flexible sleeves
Solution Approach 1:
Instead of pushing the sleeve from the bottom end as in conventional methods, the invention inverts the approach by ejecting the sleeve from the top end of the container downwards. This allows thin and flexible sleeves to be properly handled and positioned without requiring thick, inflexible materials that could withstand bottom-up mechanical pushing forces.
Solution Approach 2:
The invention replaces the mechanical gripping and pushing system with a pneumatic or gravitational ejection system. The sleeve is fed from a reel, opened, and ejected using air pressure or controlled release mechanisms rather than mechanical rods and grippers, enabling compatibility with flexible and thin sleeve materials.
2Productivity
If a push-up bar is used to move the sleeve over the bottom end of the bottle, then the sleeve can be positioned around the container, but the machine is less suitable for handling flexible containers and thin sleeving material
Solution Approach 1:
The invention inverts the sleeving direction by ejecting sleeves from the top of the container downwards rather than pushing from the bottom upwards. This allows flexible containers and thin sleeves to be handled effectively while maintaining high processing speeds through controlled ejection mechanisms.
Solution Approach 2:
The invention employs pneumatic ejection systems to propel sleeves onto containers at high speed. Compressed air or pneumatic actuators replace mechanical push-up bars, enabling fast operation while being gentle enough for flexible containers and thin sleeve materials.
3Productivity
If the machine uses a push-up bar mechanism, then sleeves can be arranged around containers, but the machine is not suitable or less so for sleeving containers of a generally tapering shape
Solution Approach 1:
By inverting the ejection direction to shoot sleeves from the top downwards onto tapering containers, the invention enables proper sleeve positioning on containers with varying cross-sections. The sleeve naturally conforms to the tapering shape during the downward ejection process, maintaining high processing speeds while accommodating diverse container geometries.
Solution Approach 2:
The invention employs dynamic ejection mechanisms that can adjust ejection force and timing to accommodate different container shapes including tapering forms. The pneumatic or gravity-based system adapts to the container geometry during the sleeving process, unlike rigid push-up bar mechanisms.
4Reliability
If conventional sleeving methods are used with complex machinery, then sleeves can be arranged around containers, but the processing speed is relatively low and the system is not suitable for high speed labeling
Solution Approach 1:
The invention implements continuous sleeve feeding from reels with automatic opening and ejection mechanisms, eliminating the need for individual sleeve handling and positioning operations. This continuous action system achieves both high processing speeds and reliable sleeve application through automated, uninterrupted operation.
Solution Approach 2:
The invention replaces complex mechanical gripping, positioning, and pushing systems with pneumatic ejection and gravity-assisted sleeve deployment. This substitution simplifies the mechanism while increasing both speed and reliability through reduced mechanical complexity and fewer moving parts.
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 approach enables fast, reliable, and cost-effective labeling of containers with flexible sleeves, reducing complexity and increasing processing speed while minimizing damage to containers and sleeves, especially for tapering and filled containers.
Implementation Method 1
arranging a sleeve of heat shrinkable foil around the container by ejecting the sleeve from a mandrel unit by ejecting the sleeve towards the container; wherein the ejected sleeve is moved upwardly in substantially the opposite direction of the gravitational force to a position around the container
Implementation Method 2
the ejected sleeve is moved upwardly in substantially the opposite direction of the gravitational force
Implementation Method 3
Heat shrinkable sleeves can be used to provide labels on containers; a sleeve of heat shrinkable foil; the sleeve is heat shrunk around the container to fix the sleeve to the container
Data Source
AI summary
The invention relates to container sleeving system and method. Sleeves of heat shrinkable foil are arranged around the container. The sleeves are supplied by ejecting the sleeve from the sleeve supply. Containers are supplied form a container supply. The sleeve supply arranges the sleeve around the container by moving the sleeve upwardly around the container. A heat shrink oven is arranged for fixing the sleeve to the container. A conveyor transports containers.