Magnetic Cap Ejection Mechanism for Aseptic Capping
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Solution Overview
Problem
Existing container capping machines require long ejector rods with complex mechanics, which are difficult to maintain and ensure clean sealing, especially in aseptic applications, and shorter rods require complex kinematics for reliable cap ejection.
Innovation Solution
A compact cap ejection device using a magnetic locking mechanism between a capper head and an ejection rod, allowing axial displacement without contact, enabling efficient cap ejection without mechanical friction or contact forces, and allowing for autonomous operation in clean rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long ejector rods are used to eject caps from the capping head, then the cap ejection function is reliable, but the device complexity increases and maintaining clean sealing becomes difficult
Solution Approach 1:
The patent replaces the traditional long mechanical ejector rod with a magnetic field-based ejection system. Magnets embedded in the capping head interact with a ferromagnetic element on the cap to provide ejection force, eliminating the need for complex mechanical linkages and long rods while maintaining reliable cap ejection functionality
Solution Approach 2:
The patent utilizes magnetic field interaction as an alternative to mechanical contact, where the magnetic force acts as an invisible medium to transmit the ejection force from the capping head to the cap, avoiding mechanical friction and contact forces that complicate the system
2Reliability
If long ejector rods are used, then cap ejection is effective, but the device size increases and clean room compatibility decreases
Solution Approach 1:
The magnetic ejection system eliminates the need for long physical ejector rods by using magnetic field interaction to transmit force wirelessly across the small gap between the capping head and the cap, dramatically reducing the required structural length while maintaining ejection effectiveness
3Volume of moving object
If shorter ejector rods are used to reduce device size, then compactness is improved, but complex kinematics are required for reliable ejection
Solution Approach 1:
The magnetic ejection system replaces complex mechanical kinematics with a simple magnetic field interaction. The magnets in the capping head directly interact with the ferromagnetic element on the cap, providing intuitive and reliable ejection force without requiring complex kinematic mechanisms
Solution Approach 2:
The magnetic field acts as an intermediary between the capping head and the cap, transmitting the ejection force through the air gap without requiring direct mechanical contact or complex intermediate mechanisms, simplifying the overall system while maintaining compact dimensions
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
The device achieves reliable and collision-free cap ejection with reduced maintenance needs, maintaining cleanliness and compactness, and compensates for component tolerances through magnetic locking, ensuring efficient operation in aseptic environments.
Implementation Method 1
a magnetic locking section (22) and a magnetic armature (23) attached to the ejection rod (21), which can be locked relative to one another by magnetic interaction
Implementation Method 2
preferably by magnetic attraction, so that in the locked state an axial displacement of the capping head via the lifting rod causes an axial displacement of the ejection rod relative to the capper head
Data Source
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AI summary
Device (1) for closing a container with a closure, preferably in a beverage filling plant, wherein the device (1) comprises: a capper (10) with a capping head (11) axially displaceable via a lifting rod (12a), which is configured to receive the closure and apply it to the container; and an ejection device (20) with an ejection rod (21) which is configured to eject a closure from the capping head (11) axially displaceable relative to the capping head (11);characterized in that the ejection device (20) further comprises a magnetic locking section (22), which is preferably arranged in a stationary position, and a magnetic armature (23) attached to the ejection rod (21), which can be locked relative to each other by magnetic interaction, so that in the locked state an axial displacement of the capping head (11) via the lifting rod (12a) causes an axial displacement of the ejection rod (21) relative to the capping head (11).