Core-Shell Composite 3D Printing for Impact and Tensile Balance
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Solution Overview
Problem
Existing 3D printing technologies struggle to produce 3D objects with improved mechanical properties, such as impact strength and elongation at break, while maintaining high modulus and tensile strength.
Innovation Solution
A process for preparing a multi-phase composite 3D object by building a core and shell from different compositions, where the core and shell materials have distinct properties, and are solidified to form a composite with enhanced mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single material is used for 3D printing, then the manufacturing process is simple, but the mechanical properties (impact strength, elongation at break) are limited
Solution Approach 1:
The 3D object is divided into core and shell regions with different material compositions. The core uses a first composition while the shell uses a second composition, allowing each region to contribute different mechanical properties to the overall structure, thereby improving impact strength without requiring complete process redesign
Solution Approach 2:
The patent employs multi-phase composite materials where the core and shell are formed from different compositions with distinct properties. This composite structure combines the advantages of each material to achieve superior mechanical properties, particularly improved impact strength and elongation at break while maintaining manufacturing feasibility
2Strength
If different materials are used for core and shell, then the mechanical properties are improved, but the manufacturing process becomes more complex
Solution Approach 1:
Different material compositions are applied to specific regions (core and shell) based on their functional requirements. The shell region receives a composition optimized for surface properties and impact resistance, while the core receives a composition optimized for structural integrity, allowing each region to have locally optimized properties without complicating the overall manufacturing approach
3Strength
If a multi-phase composite structure is created, then the mechanical properties are enhanced, but the process complexity increases
Solution Approach 1:
The manufacturing process prepares and positions different material compositions in advance before final assembly. The core and shell compositions are pre-formulated and ready for application, allowing the multi-phase structure to be created systematically without requiring complex real-time processing decisions, thereby enhancing tensile strength while managing process complexity
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 process results in 3D objects with improved impact strength and elongation at break, while maintaining high modulus and tensile strength, allowing for customizable mechanical properties through the use of core and shell structures.
Implementation Method 1
solidifying the at least one first composition and the at least one second composition
Data Source
AI summary
A process for the preparation of a multi-phase composite 3D object comprising the core and shell, which comprises: (A) Generating data of the core and shell of a 3D model of the 3D object; (B) Building the core of said 3D model from at least one first composition and building the shell of said 3D model from at least one second composition according to the data generated, wherein the core is built by dispensing the at least one first composition from a first dispenser, and (C) Solidifying the at least one first composition and the at least one second composition to obtain the multi-phase composite 3D object, wherein the solidified material of the at least one first composition and the solidified material of the at least one second composition have different properties.