Additive Manufacturing of Porous Structures With Faster CNC Processing

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Solution Overview

Problem

Existing methods for manufacturing porous structures, such as those used in medical implants and lightweight structures, are time-consuming and do not ensure consistent quality.

Innovation Solution

A method utilizing powder bed fusion techniques like laser sintering to manufacture large-scale porous structures, integrating solid and porous portions in a single unit, reducing manufacturing time and enhancing structural integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional manufacturing methods are used for porous structures, then manufacturing quality can be maintained, but manufacturing time is excessive

Engineering Contradiction:

Improvemanufacturing timeVSAvoidmanufacturing quality consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The manufacturing process is segmented into distinct operational phases (heating, sintering, cooling) with automated transitions between them. The controller divides the manufacturing sequence into manageable segments that can be executed systematically, reducing overall manufacturing time while maintaining quality through structured process control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system incorporates feedback mechanisms where the controller monitors manufacturing progress and adjusts process parameters accordingly. This feedback loop ensures consistent quality by detecting deviations and correcting them in real-time, while the automated feedback-driven transitions between phases reduce manual intervention time.

Inventive Principle:

Principle #23Feedback

2Strength

If complex porous structures are manufactured using existing methods, then structural integrity can be achieved, but manufacturing time increases significantly

Engineering Contradiction:

Improvestructural integrityVSAvoidmanufacturing time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The system dynamically changes process parameters (temperature, heating rate, sintering time) based on the specific requirements of the porous structure being manufactured. By optimizing these parameters for different structural complexities, the system maintains structural integrity while minimizing manufacturing time through parameter adaptation rather than using fixed, conservative settings.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The controller pre-plans and pre-heats to required temperatures before sintering begins, and performs preliminary positioning and setup automatically. This preliminary action ensures that when the actual sintering process starts, all conditions are optimized for structural integrity from the beginning, eliminating time losses during the manufacturing process itself.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If automated manufacturing processes are implemented, then manufacturing time is reduced, but process complexity increases

Engineering Contradiction:

Improvemanufacturing speedVSAvoidprocess control complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The controller is designed as a universal multi-functional device that can manage heating, sintering, cooling, and transition phases through a single integrated system. This universal controller reduces overall process control complexity compared to having separate control systems for each function, while maintaining high manufacturing speed through coordinated multi-functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The automated system performs self-service through automatic transitions between phases and self-regulation of process parameters. The controller autonomously manages the manufacturing sequence without requiring complex external intervention, reducing the operational complexity burden on operators while maintaining high productivity through self-managed process optimization.

Inventive Principle:

Principle #25Self-service

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 method significantly reduces manufacturing time while ensuring high-quality, reliable integration of solid and porous portions, suitable for medical implants and other applications requiring bone ingrowth and stress minimization.

Implementation Method 1

Powder bed fusion techniques such as laser sintering metal powder are often used

Methodology Applied

Scientific EffectLaser sintering: Selective Laser Sintering

Implementation Method 2

laser sintering metal powder

Methodology Applied

Scientific EffectLaser heating: Laser

Data Source

PatentUS12434302B2Method for manufacturing porous structures using additive manufacturing

Publication Date: 2025.10.07 ORTHO DEV CORP

AI summary

A novel process for creating porous structures via additive manufacturing processes such as material deposition or powder bed fusion additive manufacturing is provided. The process reduces the computational requirement for generation of the porous structure geometry and for processing the porous structure geometry to generate CNC code. The process provides reduced file size for CNC code and avoids large files which may exceed capacity of manufacturing machines. The process also significantly reduces the time required to manufacture the porous structure on an additive manufacturing machine.