Powder Supplying Device Automatic Cleaning Air Roll

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Solution Overview

Problem

Powder coating installations and their associated supplying devices require careful cleaning when changing between different types or colors of powder to prevent coating errors, as residual powder particles can cause issues during new powder applications.

Innovation Solution

A powder supplying device with a cuboidal powder chamber equipped with a cleaning compressed-air inlet and outlet, allowing for the introduction of cleaning compressed air to form an air roll that swirls and removes residual powder, facilitating automatic cleaning without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual cleaning is performed to remove residual powder, then cleaning effectiveness is improved, but cleaning time and labor requirements increase

Engineering Contradiction:
Improvecleaning effectivenessVSAvoidcleaning time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The powder container cleans itself by introducing cleaning compressed air through the inlet opening, which forms an air roll that automatically removes residual powder from the chamber walls and discharges it through the outlet opening, eliminating the need for manual cleaning operations

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system uses compressed air (pneumatics) to perform the cleaning function - cleaning compressed air is introduced into the powder chamber to form an air roll that mechanically removes residual powder particles from the chamber surfaces and transports them to the outlet opening for discharge

Inventive Principle:
Principle #29Pneumatics and hydraulics

2Manufacturing precision

If thorough cleaning is performed to prevent coating errors, then quality is improved, but productivity decreases

Engineering Contradiction:
Improvecoating qualityVSAvoidpowder change speed
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The automatic cleaning system ensures coating quality by consistently removing residual powder through the air roll mechanism without requiring manual intervention, maintaining reliable cleaning results while enabling faster powder changes

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The pneumatic cleaning system provides rapid and consistent removal of residual powder through compressed air flow, enabling quick powder changes while maintaining coating quality by effectively preventing contamination from residual particles

Inventive Principle:
Principle #29Pneumatics and hydraulics

3Reliability

If cleaning compressed air is introduced to remove residual powder, then cleaning effectiveness is improved, but device complexity increases

Engineering Contradiction:
Improveresidual powder removalVSAvoidcleaning system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The inlet opening serves dual purposes: it is the normal inlet for introducing coating powder during operation and the inlet for introducing cleaning compressed air during cleaning operations, eliminating the need for separate cleaning inlets and reducing device complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses the existing powder inlet infrastructure to perform cleaning functions, with the same inlet opening handling both powder supply and cleaning air introduction, thereby avoiding additional complex cleaning-specific components

Inventive Principle:
Principle #25Self-service

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 device enables efficient and automatic cleaning of the powder container, effectively removing residual powder and preventing coating errors during changes in powder type or color, thereby simplifying the process and reducing manual cleaning time.

Implementation Method 1

introduction of cleaning compressed air to form an air roll that swirls and removes residual powder

Methodology Applied
Scientific EffectAir roll: Vortex Ring

Implementation Method 2

residual powder can be driven out from the powder chamber with the aid of the cleaning compressed air introduced into the powder chamber during the cleaning operation

Methodology Applied
Scientific EffectGas flow drag: Drag

Data Source

PatentUS9387995B2Powder supplying device and method for automatically cleaning a powder supplying device
Publication Date: 2016.07.12 GEMA SWITZERLAND GMBH
  • US9387995B2 patent drawing
  • US9387995B2 patent drawing
  • US9387995B2 patent drawing

AI summary

A powder supplying device for a powder coating installation with at least one closable powder container, which has a substantially cuboidal powder chamber for coating powder and a fluidizing device for introducing fluidizing compressed air into the powder chamber. At least one inlet opening is provided in a side wall of the powder container for feeding coating powder during a powder coating operation of the powder coating installation or for introducing cleaning compressed air during a cleaning operation of the coating installation. At least one outlet is provided for discharging fluidizing compressed air introduced into the powder chamber or for discharging cleaning air introduced into the powder chamber during the cleaning operation together with residual powder transported along with the cleaning compressed air. At least one powder feed line and at least one cleaning compressed-air feed line are connected via a diverter to the at least one inlet opening.