Electromagnetic Power Assembly for Sealing Jaws
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Solution Overview
Problem
Existing electromagnetic energy transfer systems in packaging machines are inefficient and sensitive to variations in the air gap between fixed and movable cores, leading to unreliable energy transfer during the sealing process of pourable food products.
Innovation Solution
A sealing device employing an electromagnetic power assembly with a fixed magnetic core and a movable core arranged in a configuration where the primary winding faces the secondary winding interjacently, reducing sensitivity to air gap variations and enhancing energy transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an electromagnetic energy transfer system is used to power heating members in sealing jaws, then energy delivery to the sealing process is improved, but the system becomes sensitive to air gap variations between fixed and movable cores, reducing reliability
Solution Approach 1:
A flexible conduit is introduced as an intermediary component to connect the movable core to the power supply. This conduit flexes and extends as the sealing jaw moves, maintaining electrical connection while accommodating the motion. The intermediary solves the problem of maintaining reliable energy transfer despite air gap variations and mechanical movement.
Solution Approach 2:
The patent replaces rigid mechanical electrical connections with a flexible conduit system that can accommodate movement. This substitution allows the electromagnetic energy transfer system to maintain reliable connection during the dynamic operation of the sealing jaw, eliminating the reliability issue caused by air gap variations.
2Ease of operation
If the sealing jaw is designed to move for gripping and sealing operations, then the sealing function is improved, but electrical connection to the heating member becomes difficult to maintain, affecting energy transfer
Solution Approach 1:
The flexible conduit acts as an intermediary between the stationary power supply and the moving heating member. It maintains electrical connection throughout the sealing jaw's movement cycle, enabling both the sealing function and continuous energy supply without interruption.
Solution Approach 2:
The electrical connection system is made dynamic through the flexible conduit, which can extend and flex as the sealing jaw moves. This dynamic design maintains electrical continuity during operation, allowing the sealing jaw to perform its gripping and sealing movements while continuously receiving power.
3Use of energy by moving object
If a rigid electrical connection system is used for the movable jaw, then electrical connection is maintained, but the movement and flexibility of the sealing jaw are restricted
Solution Approach 1:
The flexible conduit serves as a mediator that provides electrical connection without the rigidity constraints of traditional rigid connectors. It allows the sealing jaw to move freely through flexing and extending, maintaining electrical connection while preserving full operational flexibility.
Solution Approach 2:
The flexible conduit is implemented as a flexible electrical connection component that can bend and extend. This flexible structure maintains electrical continuity while accommodating the full range of motion of the sealing jaw, eliminating the movement restrictions that would result from rigid electrical connections.
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 solution provides a reliable and efficient electromagnetic energy transfer system that maintains consistent energy delivery despite air gap changes, improving the sealing process and reducing wear, thus enhancing packaging machine performance.
Implementation Method 1
an electromagnetic power assembly, comprising a fixed magnetic core and a movable core arranged in a given configuration, for transferring electric energy by electromagnetic induction from the fixed core to the movable core
Implementation Method 2
a heating member, powered by the movable core, for melting the packaging material
Data Source
AI summary
A sealing device producing sealed packages filled with pourable food product from sheet packaging material comprises a supporting frame, a forming mechanism movable with respect to the frame along a path to fold the sheet packaging material, a sealing arrangement carried by the forming mechanism to seal the sheet packaging material and form the packages, and an electromagnetic power device supplying electric energy to the sealing arrangement. The power device comprises at least one primary winding fixed to the frame and connectable to an electric energy source, and a secondary winding movable along the path, powering the sealing arrangement, and receiving electric energy by electromagnetic induction from the primary winding as the secondary winding travels past the primary winding. When interconnected by electromagnetic induction, the primary and secondary windings are so arranged as to have respective adjacent portions interjacent in a first direction crosswise to the forming mechanism movement path.