Magnet-Assisted Paint Nozzle for High-Viscosity Dispensing

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Solution Overview

Problem

Applying high viscosity paint is difficult with existing automotive paint systems due to the high force required, which increases with viscosity.

Innovation Solution

A nozzle for a voltage-assisted painting system that includes electrodes and magnets to create a magnetohydrodynamic force, combined with air flow channels, to facilitate the dispensing of high viscosity paint.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If existing automotive paint systems are used to apply high viscosity paint, then the painting process can be performed with conventional equipment, but the force required to apply the paint increases significantly making it difficult to dispense

Engineering Contradiction:

Improveease of paint dispensingVSAvoidforce required to apply paint

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The patent replaces the conventional mechanical pressure-based paint delivery system with a magnetohydrodynamic (MHD) system. Electromagnets generate magnetic fields that interact with conductive paint to produce Lorentz forces, propelling the paint through the nozzle without mechanical pressure. This substitution eliminates the need for high mechanical forces while effectively dispensing high viscosity paint.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the physical parameters of the paint delivery system by introducing electromagnetic fields. By controlling the strength and configuration of magnetic fields through adjustable electromagnets, the system can adapt to different paint viscosities and flow requirements, enabling easy dispensing of high viscosity materials without increasing mechanical force requirements.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If high viscosity paint is applied with conventional systems, then standard painting procedures can be used, but the paint flow and dispensing become difficult requiring larger forces

Engineering Contradiction:

Improvepaint dispensing efficiencyVSAvoidforce required for paint flow

Core Design Contradiction:

ProductivityVSForce

Solution Approach 1:

The system replaces mechanical pumping and pressure systems with magnetohydrodynamic propulsion. Electromagnets create magnetic fields that directly interact with the conductive paint, generating forces that propel the paint through the nozzle. This eliminates mechanical force requirements while maintaining or improving dispensing efficiency for high viscosity paints.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs pulsed or cyclic electromagnetic activation to propel paint through the nozzle. By applying magnetic fields in periodic pulses rather than continuous operation, the system achieves effective paint delivery with reduced average force requirements, improving overall dispensing efficiency for high viscosity materials.

Inventive Principle:

Principle #19Periodic action

3Manufacturing precision

If conventional nozzles are used for high viscosity paint, then the nozzle structure remains simple, but the ability to form uniform droplets and facilitate paint flow is insufficient

Engineering Contradiction:

Improveuniform droplet formationVSAvoidnozzle structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges the nozzle structure with integrated electromagnets, combining the paint delivery function with the magnetic field generation function in a single integrated component. This integration enables uniform droplet formation through controlled magnetic forces while avoiding the complexity of separate magnetic assemblies, achieving precision without excessive structural complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electromagnets are strategically positioned at specific locations within the nozzle to create localized magnetic field gradients. This localized magnetic action precisely controls paint flow and droplet formation at the nozzle exit, ensuring uniform droplet quality while keeping the overall nozzle structure relatively simple with magnets placed only where needed.

Inventive Principle:

Principle #3Local quality

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 system effectively dispenses high viscosity paint by utilizing magnetohydrodynamic and air flow forces to form uniform droplets, improving the painting process efficiency.

Implementation Method 1

The first and second electrodes and the first and second magnets define a passage through which paint is configured to flow

Methodology Applied

Scientific EffectMagnetohydrodynamic force: Magnetohydrodynamic Effect

Data Source

PatentUS20250367686A1Painting system nozzle including a magnet

Publication Date: 2025.12.04 NISSAN NORTH AMERICA INC

AI summary

A nozzle for a painting system includes a first electrode, a second electrode, a first magnet and a second magnet. The first magnet is disposed between the first electrode and the second electrode when viewed in a direction parallel to a longitudinal axis of the nozzle. The second magnet is disposed between the first electrode and the second electrode when viewed in the direction parallel to the longitudinal axis of the nozzle. The first and second electrodes and the first and second magnets define a passage through which paint is configured to flow.