Volumetric 3D Printing for Hearing Instrument Shells
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Solution Overview
Problem
Conventional methods for manufacturing hearing instruments are inefficient, requiring multiple steps and high labor costs due to the need for layer-by-layer 3D printing and post-processing to achieve smooth surfaces and complex shapes.
Innovation Solution
The method involves placing a component support structure with attached operative components into a resin bath, where volumetric 3D printing forms a shell around the components, reducing the need for post-processing and enabling the production of smaller, more complex hearing instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If layer-by-layer 3D printing is used to manufacture hearing instruments, then complex shapes can be achieved, but the manufacturing process becomes slow and requires multiple post-processing steps
Solution Approach 1:
The patent transitions from layer-by-layer 3D printing (adding material in sequential layers) to volumetric 3D printing (adding material throughout the volume simultaneously). This dimensional change in the manufacturing approach enables complex shapes to be formed in a single printing operation without the sequential layering process, thereby increasing manufacturing speed while maintaining the ability to produce complex geometries.
2Shape
If layer-by-layer 3D printing is used, then complex shapes can be achieved, but the number of post-processing steps increases
Solution Approach 1:
By changing from sequential layer-by-layer printing to simultaneous volumetric printing, the patent eliminates the need for multiple post-processing steps between layers. The volumetric approach allows the entire complex shape to be formed in one continuous process, reducing the total number of manufacturing and post-processing steps required.
Solution Approach 2:
The patent combines multiple manufacturing operations into a single volumetric printing process. Instead of performing separate printing, curing, and post-processing operations for each layer, the volumetric method merges these steps into one simultaneous process that forms the complete complex shape in a single operation.
3Productivity
If conventional manufacturing methods are used, then production can be maintained, but labor costs are high and efficiency is low
Solution Approach 1:
The patent replaces conventional mechanical manufacturing methods (molding, assembly, post-processing) with a volumetric 3D printing system that uses light-based polymerization to form the hearing instrument housing. This substitution eliminates the need for manual labor in shaping and post-processing operations, thereby reducing labor costs and increasing manufacturing efficiency.
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 speeds up the manufacturing process, increases product quality and reliability, reduces the number of manufacturing and post-processing steps, and allows for the production of smaller hearing instruments with improved customization.
Implementation Method 1
a 3D printing apparatus performs volumetric 3D printing to form a shell of the hearing instrument attached to the component support structure
Data Source
AI summary
A method for manufacturing a hearing instrument includes placing a component support structure at least partially in a bath of a resin liquid, wherein one or more operative components of the hearing instrument are attached to or contained within the component support structure prior to the component support structure being at least partially placed in the bath of the resin liquid. While the component support structure is at least partially in the bath, volumetric 3-dimensional (3D) printing is performed to form a shell of the hearing instrument attached to the component support structure.