Computational Two-Piece Mold Design for Non-Destructive Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for casting complex objects with rigid two-pieced molds face challenges in non-destructive extraction, as no parting direction may exist for single-stepped extraction, leading to potential mold or object damage.
Innovation Solution
A computational method for designing re-usable two-pieced molds involves manipulating digital surface descriptions through object deformation, splitting into sub-objects, and optimizing orientation and position using an optimization algorithm to calculate feasible mold shapes and parting lines, allowing for single-stepped non-destructive extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single rigid two-pieced mold is used for casting complex objects, then the manufacturing process is simple, but non-destructive extraction cannot be achieved due to lack of suitable parting direction
Solution Approach 1:
The patent applies segmentation by dividing complex objects into multiple sub-objects that can be independently molded. The computational method automatically decomposes the digital surface description of complex objects into separate sub-objects, each of which can be cast using a single rigid two-pieced mold without extraction damage. This resolves the contradiction by maintaining simple molding processes while enabling safe extraction through object decomposition.
Solution Approach 2:
The patent employs dimensionality change by transforming 3D complex objects into 2D digital surface descriptions for computational manipulation. The optimization algorithm operates in the digital domain to determine feasible parting directions and mold designs, then translates these solutions back to physical mold construction. This computational dimensionality transformation enables the resolution of extraction problems that are difficult to solve through traditional 3D physical prototyping.
2Adaptability or versatility
If flexible molds are used to reproduce complex object shapes, then complex shapes can be achieved, but careful removal is required to avoid damaging the mold or object
Solution Approach 1:
The patent applies the disposable principle by using rigid molds that are designed for single-use or limited-use scenarios. Rather than creating durable flexible molds that require careful handling during removal, the method designs rigid molds that can be safely extracted even if used once. This trades mold durability for ease of operation, allowing simple rigid mold construction while eliminating the careful removal requirements of flexible molds.
3Reliability
If the number of molds is increased to handle complex objects, then non-destructive casting can be achieved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent applies segmentation optimally by dividing objects into the minimum necessary number of sub-objects. The computational optimization algorithm evaluates different decomposition strategies and selects the solution that achieves non-destructive casting with the fewest molds. This resolves the contradiction by finding the optimal balance between object decomposition and mold quantity, avoiding unnecessary complexity while ensuring safe extraction.
Solution Approach 2:
The patent employs parameter changes by optimizing digital surface description parameters such as mesh resolution, triangle orientation, and parting direction angles. The optimization algorithm adjusts these parameters to find configurations that enable single-mold casting of sub-objects. By carefully controlling these digital parameters, the method reduces the number of physical molds needed while maintaining non-destructive casting capability.
Data Source
AI summary
The invention relates to a method for computationally designing a number of re-usable two-pieced molds for the reproduction of an object, wherein each mold is fillable with filling material, in particular resin, to form the object or a part of the object to be reproduced, wherein each mold consists of rigid material.