Filament Spool Container with Sensor Detection for 3D Printing

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Solution Overview

Problem

Existing digital manufacturing systems face challenges in efficiently managing and interchanging filament supplies during 3D model building, particularly in distinguishing between modeling and support filaments and ensuring continuous operation without interruptions.

Innovation Solution

The development of a filament spool container system with a filament guide mechanism and sensor integration, allowing for the detection of filament presence and type, and enabling the automatic switching between different spools to maintain a continuous supply of filaments to the digital manufacturing system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple filament spools are used to maintain continuous operation, then productivity is improved, but device complexity increases due to the need for spool management systems

Engineering Contradiction:

Improvecontinuous operation capabilityVSAvoidspool management system

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The filament supply system is segmented into multiple independent spools, each capable of being individually managed and replaced. The container is divided into multiple chambers that can independently hold different spools, allowing the system to transition from a single-point-failure architecture to a multi-component redundant architecture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filament container and drive mechanism are designed with universal compatibility to accommodate multiple spool types and configurations. The system can universally manage different filament materials (modeling and support) using the same basic infrastructure of chambers, sensors, and drive wheels, reducing the need for specialized subsystems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If filament presence detection sensors are integrated in the channel, then reliability is improved by preventing interruptions, but device complexity increases

Engineering Contradiction:

Improvecontinuous filament supplyVSAvoidsensor integration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The sensor system performs preliminary detection of filament presence and type before the filament is actually consumed or a problem occurs. By monitoring filament status in advance within the channel, the system can proactively manage spool replacement and prevent interruptions to the building process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Optical sensors provide continuous feedback about filament presence, type, and status to the control system. This feedback loop enables automated decision-making regarding spool replacement and ensures the system maintains awareness of filament status without requiring manual intervention.

Inventive Principle:

Principle #23Feedback

3Ease of operation

If automated spool interchangeability is implemented, then ease of operation is improved, but device complexity increases

Engineering Contradiction:

Improvespool interchangeabilityVSAvoidautomated interchange mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system performs self-service by automatically detecting when filaments need replacement and executing the interchange process without user intervention. The automated drive mechanism and sensor system work together to manage spool rotation, filament feeding, and replacement timing, freeing the user from manual spool management tasks.

Inventive Principle:

Principle #25Self-service

4Measurement precision

If sensor detection and communication systems are added to the container, then measurement precision is improved for filament tracking, but loss of information decreases due to better monitoring

Engineering Contradiction:

Improvefilament presence detectionVSAvoidfilament status tracking

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent replaces manual visual inspection and mechanical filament tracking with optical sensor-based detection and electronic communication systems. Optical sensors precisely detect filament presence and type by analyzing light properties, while communication interfaces transmit this information digitally to the control system, eliminating information loss associated with manual monitoring.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This solution ensures seamless operation by preventing user confusion, allowing for the efficient interchange of filaments, and maintaining a continuous supply, thereby reducing downtime and improving the overall efficiency of the 3D model building process.

Implementation Method 1

detecting the presence of the filament in the channel with a sensor within the channel

Methodology Applied

Scientific EffectOptical detection: Absorption (EM radiation)

Data Source

PatentUS8132753B2Filament spool and filament spool container, and methods of use thereof

Publication Date: 2012.03.13 STRATASYS INC

AI summary

A filament spool for use in a filament spool container, where the filament spool comprises a first rim and a second rim offset by an axial shaft, and a series of grooves extending along a first portion of the first rim and configured to receive a filament of a material while the filament is wound around the axial shaft in a first rotational direction.