3D Printhead Radiating Plate for Low-Warping FDM Deposition

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Solution Overview

Problem

FDM and FFF additive fabrication processes face challenges such as anisotropy, porosity, warping, poor mechanical properties, and dimensional precision, limiting their suitability for functional parts requiring structural solidity.

Innovation Solution

Incorporation of a radiation emission device with a radiating plate and heating elements to modulate characteristics like porosity, warping, isotropy, and mechanical properties by controlled thermal radiation during the additive fabrication process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional FDM/FFF heating methods are used, then the polymer filament can be melted and extruded, but the printed parts exhibit anisotropy, porosity, and poor mechanical properties

Engineering Contradiction:

Improvemechanical propertiesVSAvoidanisotropy

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The heating function is segmented into two distinct systems: a conventional heating block for melting the filament, and a radiating plate for post-deposition heating of the printed layer. This segmentation allows each system to perform its specific function optimally, with the radiating plate addressing the anisotropy issue that the conventional heating block cannot resolve.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radiating plate performs preliminary heating of the deposition surface before the filament is extruded. This pre-heating action ensures that the substrate is at the optimal temperature for receiving the molten filament, improving adhesion and reducing thermal shock, which contributes to reduced anisotropy and improved mechanical properties.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If rapid cooling is applied to solidify the deposited layer, then production speed increases, but warping and dimensional instability occur

Engineering Contradiction:

Improvedeposition speedVSAvoiddimensional precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The radiating plate performs preliminary heating of the deposition surface before material deposition, creating a thermal buffer that reduces the temperature differential between layers. This preliminary action allows for faster deposition speeds while minimizing warping caused by rapid cooling.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the thermal parameters by introducing radiant heating that operates at different temperature levels and durations compared to conventional conduction heating. The radiating plate can maintain optimal temperatures without the need for rapid cooling cycles, thereby improving dimensional precision while maintaining productivity.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If higher extrusion pressure is applied to improve flow through the nozzle, then deposition quality improves, but anisotropy and internal stress increase

Engineering Contradiction:

Improvedeposition qualityVSAvoidinternal stress

Core Design Contradiction:

Manufacturing precisionVSStress or pressure

Solution Approach 1:

The radiating plate pre-heats the deposition surface, allowing the extruded material to spread and bond more effectively at lower pressures. This preliminary thermal preparation reduces the need for high extrusion pressure, thereby improving deposition quality while minimizing internal stress and anisotropy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the thermal state of the deposition surface to optimize the flow and bonding characteristics of the extruded material. By controlling the temperature of the substrate rather than relying solely on extrusion pressure, the system achieves high deposition quality with reduced internal stress.

Inventive Principle:

Principle #35Parameter changes

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

Improves mechanical characteristics and quality of printed products by reducing anisotropy, warping, and enhancing mechanical properties through controlled thermal radiation.

Implementation Method 1

at least one heating element configured to heat the radiating plate

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

modulate characteristics like porosity, warping, isotropy, and mechanical properties by controlled thermal radiation during the additive fabrication process

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentUS20260021634A1Radiation-emmitting device for an additive manufacturing apparatus

Publication Date: 2026.01.22 COALIA

AI summary

The disclosure concerns a 3D printhead, a radiation emission device, and processes for additive fabrication and extrusion. The printhead comprises a radiating plate configured to transmit a thermal energy to the printing material deposited on a surface. A radiation emission device may be attached to an additive fabrication or extrusion device and comprising a radiating plate and a heating element. Additive fabrication and extrusion processes using a radiation for heating a surface for deposition of the material. Characteristics of products thus produced, such as porosity rate, warping, isotropy, maximum stress, internal stress, impact resistance, bending resistance, deformation at break, rigidity modulus, crystallinity rate, and impermeability are improved.