Grinder Extractor Structure for Airborne Particulate Containment

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Solution Overview

Problem

Conventional grinding processes for removing primer paint from metal surfaces generate hazardous airborne particulates that contaminate work areas and pose health risks to workers, necessitating relocation of activities and increased clean-up efforts, while existing extractors are complex, expensive, and inefficient.

Innovation Solution

A partially enclosed extractor for grinders, comprising walls and a port, which captures over 90% of airborne particulates by positioning around the grinding disc and using vacuum suction, fabricated from stainless steel for durability and ease of use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If conventional vacuum ducting is positioned close to the grinder, then some particulate extraction is achieved, but the extraction efficiency is inadequate and particulate still becomes airborne

Engineering Contradiction:

Improveparticulate extraction efficiencyVSAvoidextractor structure complexity

Core Design Contradiction:

Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The extractor body is divided into multiple walls (first wall, second wall, third wall, fourth wall) that are spaced apart to define distinct internal spaces, allowing the grinding disc to rotate freely while maintaining effective particulate containment and extraction pathways

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The extractor body is positioned around the grinding disc, with the grinding disc nested within the internal space defined by the walls, allowing the grinder to operate within the extractor without removal

Inventive Principle:

Principle #7Nested doll (Nesting)

2Object-generated harmful factors

If complex grinding tools and mounting apparatus are used to increase particulate capture, then extraction efficiency improves, but production cost and operational difficulty increase significantly

Engineering Contradiction:

Improveparticulate capture percentageVSAvoidmanufacturing cost and complexity

Core Design Contradiction:

Object-generated harmful factorsVSEase of manufacture

Solution Approach 1:

The extractor body serves multiple functions simultaneously: it contains grinding particulates, provides structural support for the grinder, defines the internal rotation space for the grinding disc, and facilitates vacuum extraction through integrated ports

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The extractor combines the containment structure and extraction system into a single integrated body that surrounds the grinding disc, eliminating the need for separate complex mounting apparatus and reducing overall system complexity

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If grinding activities are relocated outside the main production area to prevent particulate contamination, then worker safety and work area cleanliness are improved, but productivity and labor efficiency decrease significantly

Engineering Contradiction:

Improvework area contamination and worker safetyVSAvoidworker productivity and fabrication efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The harmful grinding particulates are extracted and removed from the work area through vacuum suction applied to the ports, allowing the grinding operation to remain in the main production area without contaminating the surrounding environment

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The extractor body acts as an intermediary between the grinding disc and the surrounding work area, containing particulates within its internal space and directing them to extraction ports for removal, thereby protecting the work area without requiring relocation of the grinding activity

Inventive Principle:

Principle #24Intermediary (Mediator)

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 extractor effectively contains grinding particulates, allowing in-situ operations, enhances worker safety, and reduces clean-up requirements, while being cost-effective and easily manufacturable.

Implementation Method 1

vacuum applied to the port draws grinding particulate created by operation of the grinder on a material from inside the body to the outlet for extraction

Methodology Applied

Scientific EffectVacuum suction: Pressure Gradient

Data Source

PatentUS20250381645A1Extractor for a grinder

Publication Date: 2025.12.18 BAE SYSTEMS PLC

AI summary

An extractor for a grinder. The extractor includes a partially enclosed body for positioning around a grinding disc of the grinder, the body having first and second walls welded to a covering portion that extends partially around a perimeter of each wall. The extractor further includes a port on the body with a passageway from the body to an outlet of the port, wherein vacuum applied to the extraction port draws grinding particulate created by operation of the grinder on a material from inside the body to the outlet for extraction. A barrel grinder that includes an extractor. A method of fabricating an extractor for a grinder.