Silicate-Coated Oven Accessory for Pyrolysis-Resistant Cleaning
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Solution Overview
Problem
Household oven accessories with chromium coatings are prone to staining during pyrolysis, requiring removal before the process, and lack durability and cleaning ease.
Innovation Solution
A glass-like silicate coating applied from a liquid phase to a metal base body, providing a thin, high-strength layer that is pyrolysis-resistant, shock-resistant, and easy to clean, with precise thickness control and covalent bonding for secure adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chromium coating is applied to metal base body, then the coating provides initial protection and appearance, but the coating is prone to staining during pyrolysis and requires removal before the process
Solution Approach 1:
The patent changes the chemical composition parameters of the coating material from traditional chromium-based coatings to glass-like silicate-based coatings. This parameter change enables the coating to withstand pyrolysis temperatures without staining, eliminating the need for removal before pyrolysis processes while maintaining protective and aesthetic functions.
Solution Approach 2:
The patent employs a composite coating system consisting of multiple layers: a base metal layer, an intermediate adhesion layer, and a top glass-like silicate coating layer. This composite structure combines the advantages of each material - the metal provides structural integrity, the intermediate layer ensures strong bonding, and the glass-like top layer provides pyrolysis resistance and ease of cleaning, resolving the contradiction between durability and operational convenience.
2Strength
If a thick coating is applied to prevent chipping, then the coating provides better protection, but the coating may cover surface structures and increase risk of flaking due to material stress
Solution Approach 1:
The patent optimizes the thickness parameter of the glass-like coating to a specific range (5-10 μm) through controlled application processes such as dip coating or spray coating. This precise parameter control ensures the coating is thick enough to provide chip resistance and protection, yet thin enough to preserve the visibility of underlying surface structures and minimize flaking risks from excessive material stress.
Solution Approach 2:
The patent applies the coating with locally optimized properties - the glass-like coating is applied to specifically protect areas prone to chipping and wear, while maintaining transparency or appropriate aesthetic qualities in visible areas. The coating thickness and composition can be locally adjusted to balance protection needs with surface structure visibility requirements.
3Temperature
If a coating is applied to provide pyrolysis resistance, then the coating can withstand high temperatures, but the coating may still chip off under extreme loads without proper adhesion
Solution Approach 1:
The patent uses a composite coating structure with an intermediate adhesion layer between the metal base body and the glass-like silicate top layer. This intermediate layer is specifically designed to provide strong chemical or mechanical bonding to both substrates, ensuring the coating system maintains excellent adhesion strength even under extreme thermal and mechanical loads during pyrolysis processes.
Solution Approach 2:
The patent controls the thermal and chemical parameters during the coating application and curing processes to optimize adhesion. By controlling parameters such as coating temperature, curing time, and chemical composition, the patent ensures the formation of strong bonds between layers while maintaining the temperature resistance required for pyrolysis applications.
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 solution allows for the use of oven accessories during pyrolysis without removal, prevents chipping, and ensures effective cleaning and durability, maintaining functionality under extreme temperatures and loads.
Implementation Method 1
the coating material is glass-like and contains silicate and is applied to the metal base body from a liquid phase... By applying the coating material from a liquid phase, for example from a so-called sol, i.e. a colloidal solution of the coating material
Implementation Method 2
crosslinking of the coating material is produced by polycondensation. Through polycondensation, silanes can be particularly advantageously crosslinked to form chain molecules with a network-like structure
Implementation Method 3
If the coating material has at least one chemical group that is intended to create a covalent bond between the coating material and the metallic surface, a secure hold of the coating material on the metallic surface can be achieved
Data Source
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AI summary
The accessory (10) is arranged in a cooking chamber and includes a base (22) made of metal and provided with a coating (24). The coating is formed by applying a glass-like coating material (26) when in the liquid phase on the base. The cross-linking of the coating material is produced by polycondensation. Independent claims are also included for the following: (1) a household baking oven; and (2) a cooking device accessory manufacturing method.