Induction-Heated Plastic Sheet Molding for Custom Orthotics
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Solution Overview
Problem
Custom orthotic devices are traditionally time-consuming and costly to produce, and individuals often require new devices as their needs change over time, leading to additional expenses and inefficiencies.
Innovation Solution
A system utilizing induction heating with electromagnetic radiation to mold plastic sheets into custom orthotic devices, where the user's body applies pressure to ensure a perfect fit, eliminating the need for separate molds and allowing for easy remolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional custom orthotic fabrication methods are used, then precision and custom fit are achieved, but production time and cost increase significantly
Solution Approach 1:
The patent changes the physical state of the plastic material by heating it to a pliable temperature, allowing it to be molded to the body part. This parameter change enables rapid shaping without traditional time-consuming fabrication steps, reducing production time while maintaining custom fit precision
Solution Approach 2:
The patent replaces traditional mechanical molding methods with electromagnetic induction heating. The electromagnetic source heats the plastic sheet to a pliable state, allowing it to conform to the body part under its own weight and applied pressure, eliminating the need for complex mechanical molding equipment and reducing production time
2Manufacturing precision
If traditional custom orthotic fabrication methods are used, then custom fit is achieved, but production cost increases
Solution Approach 1:
The patent uses a disposable or reusable plastic sheet that can be heated and molded multiple times. The plastic sheet is a low-cost material compared to traditional orthotic fabrication materials, and the electromagnetic heating system allows rapid re-molding if adjustments are needed, reducing overall production cost while maintaining custom fit precision
Solution Approach 2:
The heated plastic sheet is molded using the patient's own body part as the mold and the patient's body weight as the pressing force. This self-service approach eliminates the need for expensive custom molds and complex positioning equipment, significantly reducing production cost while ensuring precise custom fit
3Temperature
If plastic sheet is heated to high temperature for molding, then shaping capability is improved, but risk of burning the body part increases
Solution Approach 1:
The patent introduces a heat shield as an intermediary layer between the electromagnetic source and the patient's body part. The heat shield blocks direct electromagnetic radiation from heating the body part while allowing the plastic sheet to be heated on its opposite side, eliminating burn risk while maintaining the high temperature needed for plastic shaping
Solution Approach 2:
The electromagnetic source is positioned to heat only the plastic sheet locally, while the heat shield protects the body part from excessive heat. The system creates different thermal zones: the plastic sheet is heated to high temperature for molding, while the body part remains at safe temperature, allowing effective shaping without burn risk
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 method reduces production time and cost while ensuring a precise fit, enabling quick adjustments to changing user needs by using induction heating and body pressure to shape plastic orthotics.
Implementation Method 1
an electromagnetic source that generates electromagnetic radiation to heat the ferrous material such that, in conjunction with the received pressure, the plastic sheet molds into an orthotic device
Implementation Method 2
electromagnetic source that generates electromagnetic radiation to heat the ferrous material
Implementation Method 3
a heat shield mounted between the plastic sheet and the body part
Data Source
AI summary
A method for making custom orthotic devices includes mounting a plastic sheet to a housing. The method also includes receiving, by the plastic sheet, pressure from a body part of a patient. The method further includes directing electromagnetic radiation to a ferrous material mounted within the housing. The electromagnetic radiation heats the ferrous material, which heats the plastic sheet such that the plastic sheets forms into an orthotic device that fits the body part.