Multi-Layer Dental Prosthesis Mold Rotation and Cutting
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Solution Overview
Problem
The existing method for manufacturing dental prostheses with multiple layers is labor-intensive and requires individual casting of each layer, limiting productivity.
Innovation Solution
A method involving a mold filled with a layered material body, where the mold is rotated and materials are cut to form a dental prosthesis with all outer layers formed simultaneously, improving efficiency by eliminating the need for separate layer formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual casting of each layer is performed as in Patent Literature 1, then manufacturing precision of each layer can be controlled, but productivity deteriorates due to labor-intensive multi-step process
Solution Approach 1:
The patent merges multiple casting operations into a single simultaneous casting process. Multiple layers are formed at the same time by introducing different materials through different inlets during one casting operation, eliminating the need for sequential individual casting of each layer while maintaining manufacturing precision.
Solution Approach 2:
The patent prepares a multi-chamber mold structure in advance with separate inlets for different materials. The mold is designed with predetermined chambers for each layer, allowing materials to be introduced through specific inlets corresponding to their target layers, enabling precise simultaneous formation of multiple layers.
2Productivity
If multiple layers are formed simultaneously in one casting process, then productivity improves, but device complexity increases due to multi-chamber mold structure
Solution Approach 1:
The mold is segmented into multiple independent chambers, each capable of receiving and forming a specific material layer. Each chamber has its own inlet for material introduction, allowing independent control of each layer's formation while maintaining the ability to cast all layers simultaneously in one operation.
3Loss of time
If layered material body is used for simultaneous casting, then manufacturing time is reduced, but material preparation complexity increases
Solution Approach 1:
Materials are prepared in advance as separate entities and positioned in their respective mold chambers before the casting operation begins. This preliminary positioning allows the actual casting process to proceed rapidly without complex real-time material handling, reducing manufacturing cycle time while maintaining manageable material preparation complexity.
Data Source
AI summary
An object is to provide a method for manufacturing a dental prosthesis consisting of a plurality of layers with high productivity. The method for manufacturing a dental prosthesis comprises: filling a cavity (21a) formed in a mold which has a shape of the dental prosthesis with a layered material body (23) that is made by layering materials (23a, 23b) corresponding to the plurality of layers; and after this filling, rotating the mold on a material inlet (21b) of the mold and cutting the materials.