Multi-Material 3D Print Data Interpolation for Layer Alignment

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Solution Overview

Problem

Existing three-dimensional printing methods struggle to align the number of layers and size of slice data for three-dimensional shaped articles made of multiple materials, especially when the outer shape differs for each material in the stacking or deposition direction.

Innovation Solution

A method of generating three-dimensional print data that includes interpolating a continuous interpolation shape outside the maximum outline of multiple three-dimensional shapes, slicing this interpolation shape, and deleting it to align the number of layers and size of slice data for each material, ensuring consistent layering and sizing across different materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If slice data is generated separately for each material without interpolation, then the process is simple, but the number of layers and size of slice data differ for each material when outer shapes differ

Engineering Contradiction:

Improvealignment of number of layers and size of slice dataVSAvoidcomplexity of slice data generation process

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

A virtual interpolation shape is introduced as an intermediary element between the actual three-dimensional shapes and the slice data. This interpolation shape serves as a common reference framework that accommodates multiple materials with different outer shapes, enabling uniform slicing across all materials while preserving the unique geometries of individual components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The slice data generation process is segmented into distinct stages: first generating slice data for each material separately, then comparing the results, and finally interpolating to create a unified structure. This segmentation allows for systematic handling of complexity by breaking down the problem into manageable steps that can be processed independently and then integrated.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the outer shape of three-dimensional shape differs for each material, then material-specific customization is achieved, but the number of layers of slice data differs for each material in stacking direction

Engineering Contradiction:

Improvematerial-specific outer shape customizationVSAvoidconsistency of number of layers across materials

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The solution transitions from handling each material's slice data in isolation to introducing a unified interpolation shape that spans the stacking direction. This dimensional approach creates a common reference frame that accommodates varying material geometries while ensuring consistent layer counts across all materials through the interpolation process.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If the outer shape of three-dimensional shape differs for each material, then material-specific customization is achieved, but the size of slice data differs for each material in deposition surface direction

Engineering Contradiction:

Improvematerial-specific outer shape customizationVSAvoidconsistency of size of slice data across materials

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The interpolation shape serves multiple functions simultaneously: it acts as a reference for slicing, provides a common boundary for all materials, and enables uniform slice data generation across different material types. This multi-functionality resolves the contradiction by creating a universal framework that accommodates material-specific customizations while ensuring consistency.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12441063B2Three-dimensional print data generation method, and manufacturing method for three-dimensional fabricated product

Publication Date: 2025.10.14 MURATA MFG CO LTD

AI summary

A three-dimensional print data generation method is capable of matching the number of layers and/or size of slice data. Three-dimensional interpolation shape data is generated by interpolating a three-dimensional interpolation shape on three-dimensional shape data having a plurality of three-dimensional shapes composed of different materials. The three-dimensional interpolation shape defines an outline in slice data, and a shape disposed outside of the maximum outline of the three-dimensional shape on the deposition surface of the three-dimensional print and is continuous from the bottommost end to the topmost end of the three-dimensional shape in the layering direction of the three-dimensional print. The three-dimensional shape and the three-dimensional interpolation shape for each three-dimensional shape are sliced in the three-dimensional interpolation shape data to generate a plurality of items of interpolation slice data. A plurality of items of slice data are generated by deleting the three-dimensional interpolation shape so as to leave outline information.