Composite Circulating Belt for Foil Heat Sealing
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Solution Overview
Problem
Existing heat sealing devices for foil materials experience frictional wear between resilient layers and circulating belts, leading to irregular pulling forces, deformation of the foil, and difficulty in controlling sealing temperature due to inadequate heat dissipation.
Innovation Solution
The use of multiple-layer circulating belts with at least two layers having different material properties, including a resilient layer made from materials like silicones, which distribute sealing forces evenly and facilitate heat dissipation, while also preventing adhesion with the foil material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-layer resilient circulating belt is used, then the sealing force is distributed evenly, but frictional wear occurs and heat dissipation is insufficient
Solution Approach 1:
The circulating belt is constructed as a composite structure with a resilient base layer (such as silicone rubber) and a Teflon coating layer. The resilient layer provides even pressure distribution and heat dissipation, while the Teflon layer reduces friction and prevents adhesion, thereby solving the wear resistance problem while maintaining sealing quality.
Solution Approach 2:
The invention changes the material parameters of the circulating belt by selecting specific materials with appropriate properties. The resilient layer uses materials with specific elasticity and heat dissipation characteristics, while the Teflon layer provides low friction coefficients, optimizing both sealing performance and wear resistance.
2Manufacturing precision
If a single-layer resilient circulating belt is used, then the sealing force is distributed evenly, but heat accumulates between sealing blocks
Solution Approach 1:
The composite structure of the circulating belt with resilient base material and Teflon coating enables both even pressure distribution and improved heat dissipation. The resilient material conducts heat away from the sealing area more effectively than traditional single-layer materials, preventing temperature accumulation while maintaining sealing quality.
3Manufacturing precision
If high sealing forces are applied, then the sealing seam quality is improved, but the device becomes heavier and more complex
Solution Approach 1:
By changing the material parameters of the circulating belt to include resilient materials with optimized elasticity and heat dissipation properties, the device can achieve high-quality sealing seams with reduced sealing forces. This allows for a lighter overall device structure while maintaining or improving sealing performance.
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 ensures a consistent and high-quality sealing seam by maintaining even pressure and controlling the sealing temperature, reducing wear and the need for high sealing forces, allowing for a lighter and more portable sealing device.
Implementation Method 1
at least one layer is of resilient material. This resilient layer can distribute a sealing force applied by the sealing blocks evenly over the foil material
Implementation Method 2
As, during use, the circulating belt is in motion, it can discharge at least a part of the heat produced during sealing from the sealing area
Implementation Method 3
the resilient layer of the circulating belt is manufactured from a material which at the prevailing sealing temperature does not adhere to the foil material and/or the sealing parts
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~4
AI summary
The invention relates to a device for heat sealing two layers of foil material. To that end, the device comprises two blocks arranged opposite each other and conveying means for guiding the foil material between these blocks. Between the blocks, at least one heating element is provided, for heating the foil locally, and at least one circulating belt (20), which, in use, is guided along the blocks. The circulating belt (20) is built up from at least one layer of resilient material, so that a force applied by the blocks to the foil material is uniformly distributed over the sealing seam to be formed. The invention further relates to a circulating belt for use in a device according to the invention.