Electrolyte Flow Channel Segmentation for Uniform Coating

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Solution Overview

Problem

Existing devices for simultaneous coating or de-coating of multiple workpieces lack individual control over the electrolyte stream and electric field distribution, leading to inconsistent coating quality and increased rejection rates due to factors like poor contact and surface conditions.

Innovation Solution

The device employs a bath electrode in the flow channel to modify the electrolyte stream independently for each workpiece, combined with a flow distributor and additional electrodes to ensure uniform electrolyte distribution and controlled electric fields, allowing for separate regulation of each workpiece's coating process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a shared supply flow chamber is used for electrolyte supply to multiple workpieces, then device complexity is reduced, but manufacturing precision deteriorates due to inability to individually regulate electrolyte stream for each workpiece

Engineering Contradiction:
Improvestructure complexityVSAvoidcoating quality consistency
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The shared supply flow chamber is segmented into multiple independent flow channels, each leading to a specific workpiece. This segmentation allows individual electrolyte stream regulation for each workpiece while maintaining a unified device structure, thus resolving the contradiction between device complexity and manufacturing precision.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Each flow channel is equipped with its own bath electrode and flow regulator, enabling local adjustment of electrolyte stream characteristics for each workpiece. This local quality control ensures consistent coating precision across all workpieces without requiring complete system redesign.

Inventive Principle:
Principle #3Local quality

2Manufacturing precision

If individual regulation of electrolyte stream for each workpiece is implemented, then manufacturing precision is improved, but device complexity increases due to multiple flow channels and control mechanisms

Engineering Contradiction:
Improvecoating quality consistencyVSAvoidstructure complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

Multiple flow channels are merged into a single shared supply flow chamber that receives electrolyte from a common source. This merging approach allows individual regulation in each channel while avoiding the complexity of multiple independent supply systems, thus improving manufacturing precision without excessive device complexity.

Inventive Principle:
Principle #5Merging (Combining)

3Manufacturing precision

If bath electrode is introduced in flow channel for individual electrolyte stream control, then manufacturing precision is improved, but device complexity increases

Engineering Contradiction:
Improveelectrolyte stream control precisionVSAvoidcomponent quantity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The bath electrode serves multiple functions: it acts as an electrical component for electrolyte stream generation and as a flow control element for individual electrolyte stream regulation in each flow channel. This multi-functionality reduces the need for separate control components, thus improving manufacturing precision without proportionally increasing device complexity.

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

4Productivity

If multiple workpieces are coated simultaneously, then productivity is improved, but manufacturing precision deteriorates due to lack of individual workpiece control

Engineering Contradiction:
ImprovethroughputVSAvoidcoating quality consistency
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The simultaneous coating system is segmented into multiple independent flow channels, each capable of individual electrolyte stream regulation. This segmentation enables differentiated control for each workpiece during simultaneous processing, thus maintaining high productivity while achieving consistent coating quality across all workpieces.

Inventive Principle:
Principle #1Segmentation

5Reliability

If poor contact of workpiece with component electrode occurs, then manufacturing precision deteriorates, but this issue cannot be compensated in shared flow chamber systems

Engineering Contradiction:
Improveworkpiece contact reliabilityVSAvoidcoating quality
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

Each flow channel is equipped with its own bath electrode and flow regulator, enabling local adjustment of electrolyte stream characteristics for each workpiece. This local quality control ensures consistent coating precision across all workpieces without requiring complete system redesign.

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

This approach enhances coating precision and quality by preventing electrolyte accumulation and ensuring uniform coating across all workpieces, reducing rejection rates and increasing throughput while allowing for adaptable layer thickness and electric field management.

Implementation Method 1

the electric field formed between the component electrode and the bath electrode

Methodology Applied
Scientific EffectElectric field: Electric Field

Implementation Method 2

a device for chromium plating of surfaces of workpieces to be chromium-plated

Methodology Applied
Scientific EffectElectroplating: Electroplating

Implementation Method 3

simultaneous coating or de-coating of a plurality of workpieces

Methodology Applied
Scientific EffectElectrodeposition: Electrodeposition

Data Source

PatentUS9200376B2Device and method for simultaneous coating or de-coating of a plurality of workpieces and workpiece
Publication Date: 2015.12.01 ROBERT BOSCH GMBH
  • US9200376B2 patent drawing
  • US9200376B2 patent drawing
  • US9200376B2 patent drawing

AI summary

A device for simultaneous coating of a plurality of workpieces is described, the plurality of workpieces being situated in a shared flow shaft through which an electrolyte flows, and each workpiece being connected electrically conducting to at least one component electrode and being electrically insulated in relation to at least one bath electrode, and a plurality of flow channels and a flow distributor for distributing the electrolyte stream to the plurality of flow channels further being situated in the flow shaft, the at least one bath electrode being situated in one of the flow channels.