Deep-Drawing Heating Device with Depressions for Uniform Film Thickness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heating devices for producing miniaturized film pouches used in pre-portioned detergents or cleaning agents result in non-homogeneous film thickness distribution, leading to mechanical instability, rapid dissolution, and unsatisfactory appearance, while requiring complex equipment and high material usage.
Innovation Solution
A heating device with a surface featuring depressions and a planar design, surrounded by a peripheral edging, which controls film expansion to achieve uniform thickness, using materials like aluminum and coatings to enhance stability and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional heating devices are used for deep-drawing miniaturized film pouches, then production efficiency is maintained, but film thickness distribution becomes non-homogeneous leading to mechanical instability and rapid dissolution
Solution Approach 1:
The heating device features a differentially structured heating surface with central and peripheral heating zones having distinct thermal characteristics. The central region provides intensive heating while the peripheral region provides moderate heating, creating localized thermal quality variations that control different regions of the film during deep-drawing to achieve homogeneous film thickness distribution and improved mechanical stability
Solution Approach 2:
The heating surface is segmented into multiple functional zones (central heating zone, peripheral heating zone, and transition regions) with different heating intensities. This segmentation allows independent control of thermal input in different areas, preventing excessive stretching in high-stress regions while maintaining adequate plasticity where needed, thereby achieving uniform film thickness
2Strength
If intensive heating is applied to increase film plasticity, then deep-drawing capability is improved, but heterogeneous film thickness distribution becomes more pronounced
Solution Approach 1:
Different regions of the heating surface provide different levels of thermal energy to the film. The central heating zone delivers intensive heat for high plasticity requirements, while peripheral zones deliver moderate heat, creating a gradient that matches the stress distribution during deep-drawing and prevents heterogeneous thickness distribution
Solution Approach 2:
The heating device enables dynamic control of thermal input during the deep-drawing process. By adjusting the activation and intensity of different heating zones, the system can adapt thermal distribution to match the changing stress state of the film, maintaining optimal plasticity while preventing excessive localized deformation
3Manufacturing precision
If complex heating devices with heterogeneous temperature distribution are used to improve film thickness homogeneity, then manufacturing precision is improved, but device complexity and equipment cost increase
Solution Approach 1:
Multiple heating functions are merged into a single integrated heating device structure. The central and peripheral heating zones, along with transition regions, are combined in one device that can be controlled as a unified system, achieving complex thermal patterns without requiring multiple separate heating apparatuses
Solution Approach 2:
The heating device performs multiple functions simultaneously: it provides intensive heating in the center, moderate heating at the periphery, and controlled transition zones. This multi-functional design achieves homogeneous film thickness while maintaining a relatively simple overall device structure that can be integrated into existing deep-drawing systems
4Loss of substance
If minimal film material is used for miniaturized pouches, then sustainability is improved, but mechanical stability and dissolution control are compromised
Solution Approach 1:
The deep-drawing process utilizes negative pressure (vacuum) to draw the heated film into the cavity form. This pneumatic control, combined with the differentially heated film, enables precise forming of miniaturized pouches with uniform wall thickness, achieving maximum mechanical stability with minimal material usage
Solution Approach 2:
The invention changes the thermal parameters across different regions of the film during processing. By applying different temperatures and heating durations to different zones, the film's physical properties are optimized locally, allowing minimal material thickness while maintaining adequate mechanical strength and controlled dissolution characteristics
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 enables efficient production of stable and attractive film pouches with minimal material use, ensuring homogeneous film thickness and improved mechanical properties.
Implementation Method 1
While heating the films increases their plasticity, the force resulting from the negative pressure applied to the heated film causes the film to stretch and plastically deform
Implementation Method 2
the force resulting from the negative pressure applied to the heated film causes the film to stretch and plastically deform
Data Source
AI summary
The invention relates to a heating device (1) which is designed to heat a packaging film in a deep drawing process, over the course of which the heated packaging film is molded into the cavity of a deep drawing mold. The surface region of the heating device (1) which is brought into contact with the film section to be molded into the cavity has at least one depression (50), the opening area (40) of which equals 40 to 95% of the opening area (40) of the cavity. The invention also relates to a deep drawing device comprising the aforementioned heating device (1).