Dishwasher Sealing Bed Acrylic Coating for Corrosion Resistance
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Solution Overview
Problem
Existing methods for corrosion protection in dishwasher sealing beds, particularly in domestic dishwashers, are ineffective due to the low thermal stability of organo-functional silanes, leading to complete removal after 80-100 rinsing cycles and increased material costs from using CrNi steel for corrosion resistance.
Innovation Solution
Applying an acrylic resin paint into the connecting joint or capillary gap using capillary forces and curing it to provide corrosion resistance, allowing the use of cost-effective Cr steel instead of CrNi steel for the sealing bed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organo-functional silane sealing coating material is applied to the sealing channel, then corrosion protection is provided initially, but the coating material is completely removed after 80-100 wash cycles due to low thermal resistance
Solution Approach 1:
The patent changes the chemical composition parameters of the sealing coating material from organo-functional silane to acrylic resin, which has higher thermal stability. This parameter change allows the coating to withstand the thermal conditions in dishwashers without degrading and losing its corrosion protection function.
Solution Approach 2:
The patent replaces expensive CrNi steel with cheaper Cr steel that is coated with acrylic resin. The acrylic resin coating provides the necessary corrosion protection at low cost and can be applied as a thin layer, making the overall solution more economical than using expensive stainless steel throughout.
2Reliability
If CrNi steel is used for the sealing bed to ensure corrosion resistance, then adequate corrosion protection is achieved, but material costs increase
Solution Approach 1:
The patent applies corrosion protection locally rather than throughout the entire sealing bed. By coating only the sealing channel areas with acrylic resin on Cr steel, the solution provides corrosion protection where it is most needed (in the sealing channels) while using cheaper materials for the rest of the structure.
Solution Approach 2:
The patent creates a composite structure combining Cr steel substrate with acrylic resin coating. This composite material system leverages the cost advantage of Cr steel while adding the corrosion protection properties of acrylic resin only where necessary, achieving a balance between cost and performance.
3Reliability
If a multi-part design with separate front frame component is used, then corrosion resistance in the sealing bed is ensured, but manufacturing complexity increases
Solution Approach 1:
The patent merges the sealing bed with the front frame component into a single integrated part made of Cr steel. This eliminates the need for separate components and welded connections, simplifying manufacturing while maintaining corrosion resistance through the acrylic resin coating applied to the sealing channels.
Solution Approach 2:
The patent segments the corrosion protection function from the structural function. The Cr steel provides the structural framework, while the acrylic resin coating provides the corrosion protection specifically in the sealing channels, allowing each function to be optimized independently.
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
Achieves adequate corrosion protection with reduced material and production costs by applying a thin layer of acrylic resin paint, simplifying production and eliminating the need for CrNi steel in the sealing bed.
Implementation Method 1
the acrylic resin lacquer is introduced into the joint or capillary gap by utilizing capillary forces
Implementation Method 2
the acrylic resin lacquer is cured in the joint or capillary gap
Data Source
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AI summary
The invention relates to a method for producing a dishwasher, in particular a household dishwasher, with a door sealing element (7) which at least partially encircles a loading opening (5) of the dishwasher and is inserted into a sealing bed (6). According to the invention, before the door sealing element (7) is inserted, a liquid paint (27), in particular an acrylic resin paint, is applied as an anti-corrosion layer in an application step at least in a partial area of a surface of the sealing bed (7) that faces the door sealing element (7), and the liquid paint ( 27) cured.