Segmented Capacitor Plates for Uniform Foam Sole Welding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for welding foam particles using electromagnetic waves face inefficiencies in energy input, non-uniform heating, and complex three-dimensional geometry challenges, particularly in producing shoe soles or midsoles, leading to suboptimal quality and increased costs.
Innovation Solution
An apparatus with segmented capacitor plates and adjustable segments allows for customizable electromagnetic field distribution by varying the distance and arrangement of segments relative to the molding cavity, enabling uniform heating and adaptation to complex geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If steam welding machines are used to weld foam particles, then welding can be achieved, but energy input is inefficient and production costs increase
Solution Approach 1:
The patent replaces the mechanical steam-based heating system with an electromagnetic radiation system (microwave or radio frequency). The electromagnetic field directly heats the foam particles through dielectric heating, eliminating the need for steam generation equipment and improving energy efficiency. This substitution of heating mechanism resolves the contradiction by achieving welding with lower energy loss and reduced production costs.
Solution Approach 2:
The patent utilizes dielectric heating where electromagnetic energy is converted to thermal energy within the foam particles themselves. The water molecules or polar groups in the foam particles undergo rotational transitions in the electromagnetic field, generating heat internally. This phase transition from electromagnetic energy to thermal energy enables efficient welding without external steam heating, addressing the energy efficiency and cost issues.
2Loss of energy
If electromagnetic waves are used to weld foam particles, then energy efficiency improves, but uniform heating and welding quality are difficult to achieve
Solution Approach 1:
The patent divides the capacitor plate into multiple segments that can be independently controlled. Each segment can be adjusted to different distances from the molding cavity, allowing differential energy input to different regions. This segmentation enables precise control over the electromagnetic field distribution, ensuring uniform heating and welding quality across the entire workpiece while maintaining high energy efficiency.
Solution Approach 2:
The capacitor plate segments are made adjustable and movable, allowing dynamic adaptation to different workpiece geometries and sizes. The segments can be positioned at optimal distances during the welding process to maintain uniform energy distribution. This dynamic adjustability resolves the contradiction by enabling consistent welding quality across varied production requirements while preserving energy efficiency.
3Device complexity
If fixed capacitor plates are used, then device complexity is reduced, but adaptability to different product geometries is limited
Solution Approach 1:
The capacitor plate is divided into multiple independent segments that can be individually adjusted. This segmentation allows the system to adapt to various product geometries by configuring segments at different positions and distances, while the modular structure prevents excessive complexity through standardized segment designs and simple adjustment mechanisms.
Solution Approach 2:
The capacitor plate segments are designed to be movable and adjustable during operation. This dynamic capability enables the system to adapt to different shoe sole geometries and sizes without requiring completely different equipment configurations. The adjustable segments maintain system simplicity while providing high versatility for various product designs.
4Manufacturing precision
If the electrode protrudes beyond the molding tool to accommodate size differences, then complete coverage is achieved, but unused electric field increases energy consumption
Solution Approach 1:
The capacitor plate is segmented so that only the necessary portions are activated for each specific molding tool size. Segments can be individually adjusted to match the exact boundaries of the molding cavity, ensuring complete coverage of the workpiece while preventing energy waste in unused regions. This selective activation resolves the contradiction between coverage and energy efficiency.
Solution Approach 2:
Different segments of the capacitor plate can be positioned at different distances from the molding cavity, creating a non-uniform electric field distribution that is optimized for each local region. This local optimization ensures adequate energy input where needed while minimizing energy consumption in areas where the molding tool is absent, resolving the coverage-energy efficiency contradiction.
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 approach enhances energy efficiency, ensures uniform welding of foam particles, and allows for rapid production of high-quality shoe soles or midsoles with complex geometries, reducing production costs and time.
Implementation Method 1
at least one of the capacitor plates is connected to a radiation source for electromagnetic radiation
Implementation Method 2
The particles are dielectrically heated and simultaneously compressed. Electromagnetic waves with a frequency of about 2 to 1000 MHz are applied.
Data Source
AI summary
The invention relates to an apparatus and a method for the manufacture of a shoe sole or part of a shoe sole from foam particles. Disclosed is an apparatus for the manufacture of a shoe sole or part of a shoe sole from foam particles, wherein the apparatus comprises: a.) a molding tool which is formed from at least two molding halves and which defines a molding cavity, and b.) at least two capacitor plates which are arranged adjacent to the molding cavity, wherein c.) at least one of the capacitor plates is connected to a radiation source, and wherein d.) at least one of the capacitor plates comprises several segments that have an adaptable distance to the molding cavity. Also disclosed is method for using such an apparatus in the manufacture of a shoe sole or part of a shoe sole from foam particles.