Ferromagnetic Core Sealing Device for Uniform Packaging Heat
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Solution Overview
Problem
Existing packaging sealing devices often damage heat-sensitive products due to direct application of heat on the periphery during the sealing process, and they lack flexibility to accommodate different packaging materials and geometries.
Innovation Solution
A device with a ferromagnetic element that conducts magnetic flux, allowing for targeted heating of packaging material while maintaining a safe distance from the product, and is adaptable to various packaging materials through a U-shaped configuration with a recess and adjustable positioning within the coil core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat is applied directly to the packaging material periphery for sealing, then sealing effectiveness is improved, but product damage occurs due to heat-sensitive material exposure
Solution Approach 1:
The magnetic core element is designed with a specific geometry that concentrates magnetic flux and induced heating in a localized region of the packaging material periphery. This creates a non-uniform temperature distribution where heat is generated precisely at the sealing location rather than being applied broadly, thus sealing the package effectively while protecting the heat-sensitive product interior from thermal damage
Solution Approach 2:
The magnetic core element acts as an intermediary between the coil and the packaging material. It concentrates and directs the magnetic flux to specific regions, controlling where heating occurs. This intermediary structure enables precise spatial control of the heating process, separating the heat generation zone from the product area
2Productivity
If sealing is performed on continuously moving packaging material web, then productivity is improved, but uniform heating and seal quality become difficult to control
Solution Approach 1:
The magnetic core element is pre-configured with a specific geometry and positioned in advance within the coil assembly. This preliminary arrangement ensures that as the packaging material moves through the sealing device, the magnetic flux and heating are automatically concentrated at the correct location without requiring real-time adjustment, maintaining seal uniformity during continuous operation
Solution Approach 2:
The device is designed to accommodate dynamic conditions of continuous web feeding. The magnetic core element's geometry and positioning are optimized to maintain consistent heating patterns even as the packaging material moves, allowing the system to adapt to the dynamic sealing process while preserving seal quality
3Manufacturing precision
If the sealing device is designed for specific packaging geometries, then sealing precision is improved, but adaptability to different packaging types is reduced
Solution Approach 1:
The magnetic core element is designed with a geometry that provides universal applicability across different packaging types. Its configuration allows it to effectively concentrate magnetic flux for various packaging material geometries and sealing requirements, enabling a single device design to handle multiple packaging applications while maintaining seal precision
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 enhances the quality of the seal seam by ensuring uniform and controlled heating, preventing product damage and enabling the use of the same sealing installation for diverse packaging materials and geometries, while ensuring a solid and tight seal.
Implementation Method 1
a coil (25) that is connectable to a high-frequency current source, the core (24) of which is composed from a ferromagnetic conducting material
Implementation Method 2
The coil which is formed by metal strips having a specific geometry is wound around an arcuate portion that connects the ducts
Implementation Method 3
By virtue of the element that conducts a magnetic flux it becomes possible for a clearly defined region of the packaging material to be heated
Implementation Method 4
the element that conducts a magnetic flux it becomes possible for a clearly defined region of the packaging material to be heated
Data Source
AI summary
The present invention relates to a device for sealing a packaging material (10), comprising at least one sealing installation (18) which comprises at least one coil core (24) which is surrounded by at least one coil (25), wherein the coil core (24) has at least one gap (32) through which packaging material peripheries (34, 36) to be sealed are guided, wherein at least one element (23) that conducts a magnetic flux is provided, said element (23) for influencing a region (22) of the packaging material peripheries (34, 36) to be heated being disposed so as to be adjacent to the packaging material peripheries (34, 36) to be sealed.