Removable Magnetic Mask for Selective Substrate Coating

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Solution Overview

Problem

Existing masking materials, such as vinyl adhesive tapes, often lift off during processing, compromising the integrity of the coating process, and the chemicals used for removing conductive and non-conductive coatings pose environmental risks.

Innovation Solution

A removable magnetic mask is magnetically coupled to the substrate's surface, allowing for selective coating and decoupling to prevent coating deposition in specific areas, using a magnetic member that conforms to the substrate's contours and is magnetizable to adhere securely during the coating process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If vinyl adhesive tapes are used as masking materials, then they are easy to apply and remove, but they lift off during processing, compromising coating integrity

Engineering Contradiction:

Improveease of application and removalVSAvoidmasking integrity during processing

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the mechanical adhesion system (vinyl adhesive tape relying on adhesive bonding) with a magnetic field-based retention system. The mask incorporates magnetic particles or magnetic layers that interact with the substrate's magnetic properties, creating a non-contact holding force that prevents lift-off during coating processing while maintaining ease of application and removal.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental retention parameter from chemical adhesion (adhesive bonding) to magnetic attraction. By incorporating magnetic particles or magnetic layers into the mask structure, the retention mechanism transitions to a magnetic field interaction that is not susceptible to the lifting issues encountered with adhesive tapes during processing.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If lead tape is used to mask flat areas, then coating deposition is prevented in masked areas, but it requires chemical removal posing environmental risks

Engineering Contradiction:

Improvecoating deposition controlVSAvoidenvironmental risk from chemical removal

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent changes the mask material composition to incorporate magnetic particles or magnetic layers, enabling magnetic retention without requiring chemical removal. This eliminates the environmental hazards associated with chemical strippers while maintaining precise coating deposition control in masked areas.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The magnetic mask is designed as a disposable or single-use component that can be easily removed after coating without requiring chemical treatment. The magnetic particles or layers allow for simple mechanical removal or demagnetization-based removal, eliminating the need for environmentally harmful chemical removal processes.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of manufacture

If conventional masking materials are used, then coating can be applied, but the masking material must be removed using chemicals that pose environmental risks

Engineering Contradiction:

Improvecoating process capabilityVSAvoidenvironmental risk from removal chemicals

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent replaces chemical removal mechanisms with magnetic field-based retention and mechanical or demagnetization-based removal. The magnetic particles or layers allow the mask to be held securely during coating application, then easily removed without chemicals through mechanical means or by applying a reverse magnetic field, eliminating environmental hazards.

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

The magnetic mask effectively prevents coating deposition in desired areas, ensuring process integrity and reducing environmental risks associated with chemical removal methods.

Implementation Method 1

magnetic member having a first surface contour shaped to conform to the outside surface; and a magnetizable member having a second surface contour shaped to conform to the inside surface, the magnetizable member being sufficiently magnetizable to magnetically couple the removable mask to the outside surface

Methodology Applied

Scientific EffectMagnetic coupling: Magnetism

Data Source

PatentUS9790598B2Removable mask for coating a substrate

Publication Date: 2017.10.17 SIKORSKY AIRCRAFT CORP

AI summary

A system and a method for selectively coating a substrate includes a removable mask including a magnetic member having a first surface contour shaped to conform to the outside surface of the substrate and a magnetizable member having a second surface contour shaped to conform to the inside surface of the substrate. The method for coating the substrate includes magnetically coupling a removable mask to at least one surface of the substrate; forming a coating of a coating material on the at least one surface of the substrate with the magnetically coupled removable mask using a bath containing the coating material; and selectively decoupling the removable mask from the at least one coated surface to reveal a portion of the coated surface without the coating.