Door Offset Member for Uniform Paint Baking
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Solution Overview
Problem
Conventional paint baking ovens struggle to maintain the required baking conditions of 140°C for 20 minutes across the entire vehicle body, particularly in narrow areas around hinges due to the vehicle's structural limitations, leading to inadequate curing of the coating film.
Innovation Solution
A paint baking method that involves attaching a door offset member between the hinge and the main shell body or side door, increasing the distance between hinge fastening points, allowing for better airflow and heat distribution around the hinges during the baking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the vehicle body is baked in a conventional paint baking oven with standard hot air circulation, then the baking process is simple and energy-efficient, but the narrow portions around hinges cannot satisfy the required baking condition of 140°C for 20 minutes
Solution Approach 1:
The door offset member is attached before the baking process to preliminarily create the necessary space around hinges. This preliminary structural adjustment ensures that hot air can access narrow portions during baking, allowing uniform temperature distribution without requiring complex modifications to the oven itself.
Solution Approach 2:
The door offset member acts as an intermediary element between the door and the body. It temporarily alters the spatial relationship to enable proper heat circulation, then is removed after baking. This intermediary structure solves the heat access problem without permanently modifying the vehicle body or oven complexity.
2Temperature
If the door offset member is attached to increase distance between hinge fastening parts, then sufficient space is generated for hot air circulation, but the device complexity increases
Solution Approach 1:
The door offset member is a temporary, disposable component used only during the baking process. It is a simple structure that can be easily attached and removed, providing the necessary space for hot air circulation without requiring permanent or complex modifications to the vehicle assembly.
Solution Approach 2:
The door offset member temporarily changes the spatial parameter (distance) between the door and body during baking. By adjusting this parameter, sufficient space is created for hot air to reach narrow portions. After baking, the offset member is removed and the original parameters are restored.
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 method ensures that the baking conditions are met across the entire vehicle body, improving coating film quality and energy efficiency by ensuring uniform heating, including in previously underheated narrow areas.
Implementation Method 1
the vehicle body as an object to be coated is placed on a transfer trolley, applied with paint while being conveyed in a paint coating booth, and followed by a baking process in which the vehicle body, together with the transfer trolley, is carried into a paint baking oven to perform baking of a wet coating film
Implementation Method 2
the hot air is blown to the whole vehicle body, which is being conveyed in the oven body, to bake the wet coating film
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A paint baking method includes a process for conveying a vehicle body (B) while exposing the vehicle body to a hot air atmosphere to bake a wet coating film applied to the vehicle body. In the vehicle body, hinges (HI, H2) and door offset members (70) are attached between hinge fastening parts (BT11, BT21) of the main shell body (B1) and hinge fastening parts (BT12, BT22) of the side doors. The distance (L1) between the hinge fastening parts of the main shell body and the hinge fastening parts of the side door in a state in which the hinges and the door offset members are attached is longer than a distance between the hinge fastening parts of the main shell body and the hinge fastening parts of the side door in a finished vehicle state.