Auxiliary Material Conveyance for Coating Booth Overspray

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Solution Overview

Problem

Existing coating systems face inefficiencies in charging and dry separation of wet paint overspray, particularly in effectively conveying and reintroducing particulate auxiliary materials, leading to clogging and inefficient reuse.

Innovation Solution

The system conveys fresh auxiliary material from a feed container directly into reception containers beneath the booth, using flexible hoses and a blow pot or digital density feed pump for precise metering and distribution, allowing continuous refilling and simultaneous conveyance, with mechanical controls for precise flow management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If pre-coat material is dispensed into the exhaust air stream by a nozzle arrangement supplied by an injector, then the auxiliary material can be delivered to the filter apparatus, but the system becomes complex and difficult to maintain

Engineering Contradiction:

Improvecharging of overspray particlesVSAvoidnozzle arrangement and injector system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the auxiliary material delivery function from the complex injector-nozzle system and implements it through simple gravity-fed receptacles positioned beneath the spray booth. The auxiliary material is conveyed directly into the exhaust air stream at the receptacle location, eliminating the need for complex injection mechanisms while maintaining effective charging of overspray particles.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The receptacles are designed to be self-refilling through gravity feed from storage containers positioned above. The system automatically maintains adequate levels of auxiliary material without requiring external intervention or complex control mechanisms, simplifying operation and maintenance while ensuring continuous effective delivery.

Inventive Principle:

Principle #25Self-service

2Reliability

If the auxiliary material is conveyed through rigid pipelines, then the delivery is stable, but the assembly and maintenance become difficult

Engineering Contradiction:

Improvedelivery of auxiliary materialVSAvoidassembly and maintenance

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces rigid pipelines with flexible hoses for conveying auxiliary material from storage containers to the receptacles. This flexibility allows for easier assembly and maintenance, as the hoses can be routed adaptively and replaced independently, while still providing stable delivery through controlled gravity feed and pneumatic assistance when needed.

Inventive Principle:

Principle #30Flexible shells and thin films

3Productivity

If the feed container is emptied completely, then the charging is efficient, but the system requires frequent stopping for refilling

Engineering Contradiction:

Improvecharging efficiencyVSAvoidrefilling interruptions

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system incorporates a replenishment mechanism that automatically refills the feed container when it becomes empty. This preliminary action ensures continuous operation without interruptions, as the container is replenished before it needs to be emptied again, maintaining both charging efficiency and operational continuity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The gravity-fed system with automatic replenishment ensures continuous availability of auxiliary material. The feed container is constantly being refilled from storage containers positioned above, eliminating gaps in the charging process and maintaining uninterrupted delivery of auxiliary material to the exhaust air stream.

Inventive Principle:

Principle #20Continuity of useful action

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 approach enhances the charging and dry separation of wet paint overspray by ensuring precise and efficient delivery of auxiliary materials, reducing clogging and enabling effective reuse, while simplifying the assembly and maintenance of the system.

Implementation Method 1

a blow pot or digital density feed pump for precise metering and distribution

Methodology Applied

Scientific EffectFluidisation: Fluidisation

Implementation Method 2

the exhaust air stream from the spray booth

Methodology Applied

Scientific EffectAir flow:

Implementation Method 3

a filter apparatus after a flowable, particulate, so-called pre-coat material has been previously dispensed into the exhaust air stream

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Data Source

PatentUS8584616B2Method for supplying a coating system with a particulate auxiliary material

Publication Date: 2013.11.19 DUERR SYSTEMS GMBH

AI summary

In order to separate an overspray of a liquid coating material from an air current flowing through the application region of a coating system, an overspray present in the air current may be charged with a particulate auxiliary material introduced in the air current. The new or fresh auxiliary material may be delivered from a feed container via a line arrangement into a container arrangement located in a region of the fluid flow outlet, e.g., beneath the application region.