Plastic Component Electroplating with Non-Galvanizable Lacquer Mask
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Solution Overview
Problem
Existing methods for coating plastic components with metallic symbols in the automotive industry are costly and inefficient, particularly due to the need for additional processing steps like lasering and multiple electroplating processes, which increase complexity and costs, and lack sufficient abrasion resistance without protective layers.
Innovation Solution
A method involving in-mold decoration using non-galvanizable paint for symbol application during injection molding, followed by single-stage electroplating where only uncoated areas are plated, eliminating the need for lasering and additional electroplating processes, and utilizing a primer system for permanent adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PVD process is used to deposit metallic layers on plastic components, then the components achieve metallic coating with symbols, but additional laser processing is required which increases production complexity and costs
Solution Approach 1:
The patent applies preliminary action by pre-applying a non-galvanizable lacquer layer with the desired symbol pattern before the electroplating process. This preliminary marking eliminates the need for subsequent laser processing to create symbols, as the uncoated areas are already defined by the lacquer mask during the initial electroplating step.
Solution Approach 2:
The patent merges the symbol application process with the electroplating process into a single integrated operation. By using the lacquer-coated component as a mask during electroplating, the symbol creation and metallic coating are achieved simultaneously, eliminating separate laser processing steps and reducing production complexity.
2Reliability
If electroplating is applied to create metallic symbols on plastic components, then the components achieve durable metallic coating, but multiple electroplating processes and laser treatment are required which increase production time and costs
Solution Approach 1:
The non-galvanizable lacquer is applied in advance to the plastic component before electroplating, creating a permanent mask that defines the symbol areas. This preliminary action eliminates the need for multiple electroplating processes and laser treatment, allowing symbols and metallic coating to be created in a single electroplating step.
Solution Approach 2:
The patent enables continuous electroplating operation without interruption for laser marking. The lacquer-coated components are directly electroplated in one continuous process, maintaining production flow and eliminating downtime associated with removing components for laser treatment and returning them for additional electroplating.
3Reliability
If additional protective layers are applied to enhance abrasion resistance of metal coating, then the coating durability is improved, but production costs and process complexity increase
Solution Approach 1:
The patent achieves uniform protection across the entire component surface through a single electroplating process. The chromium layer is deposited homogeneously on all uncoated areas, providing consistent abrasion resistance and corrosion protection without requiring additional protective layers or complex multi-step processes.
4Manufacturing precision
If laser processing is used to create symbols on electroplated components, then precise symbol definition is achieved, but the process requires interrupting electroplating and additional processing steps which increase costs
Solution Approach 1:
The symbol pattern is preliminarily defined by applying non-galvanizable lacquer to the plastic component before electroplating. This preliminary marking ensures precise symbol definition through the lacquer mask, which acts as a permanent barrier during electroplating, eliminating the need for subsequent laser processing to define symbols.
Solution Approach 2:
The non-galvanizable lacquer serves as an intermediary mask that defines the symbol pattern during electroplating. This lacquer layer acts as a precise template that controls where the metallic coating is deposited, replacing the need for laser processing while maintaining symbol definition precision.
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 reduces production costs and complexity while ensuring high-quality, abrasion-resistant components with improved visibility and backlighting capabilities, suitable for mass production.
Implementation Method 1
the component is produced from a galvanizable plastic by injection molding and is subsequently galvanized, wherein the coated areas of the components remain free of galvanization
Implementation Method 2
symbols are applied using non-galvanizable and electrostatically stable lacquer
Implementation Method 3
utilizing a primer system for permanent adhesion
Data Source
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AI summary
The invention relates to a method for coating functional components (1) made of plastics material and having a symbol (2) or the like by means of electroplating, in which the component (1) is produced from an electroplateable plastics material in the injection molding process and then electroplated or metallized, the coated regions of the components (1) remaining free of electroplating. In this process, a print reflecting the symbol (2) or the like is applied to the component (1), the print of the symbol (2) is provided on a film of material that is not compatible with the material to be back injection molded, preferably the plastics material to be subsequently electroplated, and the printed image provided on the carrier film is permanently transferred from the film to the component in the injection molding process.