Baking Board Edge Profile for Wear-Resistant Oven Loading

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Solution Overview

Problem

Baking trays made of aluminum are not wear-resistant enough to withstand frequent pushing along steel oven supports, leading to material abrasion and potential contamination, while stainless steel trays are too heavy and expensive. Existing solutions, such as encasing aluminum trays with stainless steel profiles, pose injury and contamination risks due to sharp edges and dirt accumulation.

Innovation Solution

A U-shaped protective profile is integrated into the baking tray's edge, with its upper leg fitting into a depression on the base plate, ensuring a flush surface and rounded edges to prevent injuries and dirt accumulation, and a form-fitting connection using embossing to secure the profile in place, while maintaining a lightweight and corrosion-free design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the baking tray is made of aluminum, then it is lightweight and has good heat conduction, but it is not wear-resistant and causes material abrasion

Engineering Contradiction:

ImproveweightVSAvoidwear resistance

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The baking tray combines aluminum base sheet with stainless steel protective profile to achieve both lightweight properties and wear resistance. The aluminum provides low weight and good heat conduction, while the stainless steel profile provides abrasion resistance against oven supports.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The stainless steel protective profile is applied only to the edge areas of the aluminum base sheet where wear occurs during pushing into the oven. This localized application provides wear resistance exactly where needed while maintaining the overall lightweight aluminum construction.

Inventive Principle:

Principle #3Local quality

2Reliability

If the baking tray is made of stainless steel, then it is wear-resistant, but it is too heavy and expensive

Engineering Contradiction:

Improvewear resistanceVSAvoidweight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

3Reliability

If the edge area is encased with stainless steel sheet, then wear resistance is improved, but sharp edges and shoulders cause injury risk and dirt accumulation

Engineering Contradiction:

Improvewear resistanceVSAvoidinjury risk and contamination

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The protective profile has rounded corners and edges instead of sharp edges. The upper side and underside of the protective profile are rounded to eliminate injury risks for operating personnel and prevent dirt accumulation in sharp corners.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The protective profile includes upper and lower legs that extend vertically from the edge area, creating a three-dimensional structure that provides protection while maintaining a clean appearance and preventing dirt accumulation between layers.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 provides a durable, easy-to-clean, and safe baking tray that prevents material abrasion and contamination, ensuring effective heat conduction and stability under temperature fluctuations, while being lightweight and cost-effective.

Implementation Method 1

a form-fitting connection by means of embossing is therefore proposed. Spaced in the direction along the protective profile, which extends along the lateral edge areas of the baking tray, several embossings are made from below into the lower leg of the protective profile

Methodology Applied

Scientific EffectEmbossing: Deformation

Implementation Method 2

ensure very good heat conduction from bottom to top into the baked goods

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentEP3066394B1Baking board and baking oven with baking board

Publication Date: 2018.12.26 LIDL STIFTUNG & CO KG

Figure 1
Figure 2a~2b
Figure 3

AI summary

The laterally mounted protective profile 6 of special steel has a upper leg 6a which is accommodated in a corresponding lowered portion 4 of the main sheet 18, so as to prevent the risk of injury by the edge of said protective profile on the upper side 1a. On the lower side 1b the free edge of the lower leg 6b is flanged 180° to round the edge.