Drying Device for Motor Vehicle Body Using Residual Heat
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Solution Overview
Problem
The existing drying processes for motor vehicle bodies require multiple heating stages, leading to increased energy consumption and space requirements, particularly when using cathodic electrocoating (KTL) and polyvinyl chloride (PVC) sealing materials.
Innovation Solution
A drying device with a holding zone for maintaining a heated condition, a cooling zone for active cooling, and a machining zone where a robot applies sealing materials using the residual heat of the body, thereby eliminating the need for a separate PVC dryer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate PVC dryer is used to cure sealing materials after dip painting, then the sealing material can be properly cured, but energy consumption increases due to reheating the body
Solution Approach 1:
The patent combines the sealing material application station and the curing function into the existing dip painting drying line. The body is conveyed through the same drying oven used for paint curing, allowing both processes to occur in one thermal treatment stage rather than requiring a separate PVC dryer.
Solution Approach 2:
The drying oven is designed to serve multiple functions: curing the dip paint coating and simultaneously curing the sealing materials applied to the body. This multi-functional approach eliminates the need for dedicated equipment for each curing process.
2Reliability
If a separate PVC dryer is installed downstream of the dip painting dryer, then sealing materials can be cured, but space requirements increase
Solution Approach 1:
The patent merges the sealing material application station with the existing dip painting drying line by positioning the application station within the drying oven structure. This integration allows the curing process to occur in the same spatial envelope already allocated for paint drying.
Solution Approach 2:
The sealing material application station is nested within the drying oven structure. The conveyor system passes through the drying oven, and the application station is positioned along the conveyor path inside the oven, effectively nesting one process within another.
3Productivity
If the body is cooled immediately after dip painting, then the drying process can proceed, but sealing materials cannot be properly applied due to lack of residual heat
Solution Approach 1:
The sealing materials are applied to the body while it is still hot from the dip painting process, before the body cools down. This preliminary application ensures that the sealing materials receive the necessary heat for proper curing without requiring a separate heating stage.
Solution Approach 2:
The drying oven maintains a continuous thermal environment as the body passes through. The heating and drying process continues uninterrupted while the sealing materials are applied and cured, eliminating the need to stop or reverse the conveyor for additional heating.
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 integrated approach reduces energy consumption and space requirements by utilizing residual heat for sealing material hardening, enhancing production efficiency and avoiding issues like blistering in sealing materials.
Implementation Method 1
a holding zone (26), in which a heated state of the body (12) is maintained
Implementation Method 2
a cooling zone (30), in which the body (12) is actively cooled
Implementation Method 3
this heat or residual heat of the body can be used to change a state of the at least one sealing material (36)
Data Source
Figure 1
Figure 2~4
AI summary
The invention relates to a drying device (10) for drying a motor vehicle body (12) following dip painting of the body (12). The drying device (10) has a holding zone (26) designed to maintain a heated state of the body (12). A cooling zone (30) extends downstream of the holding zone (26) through the drying device (10) in the conveying direction (14) of the body (12). The holding zone (26) and the cooling zone (30) are separated from the surrounding area (20) of the drying device (10) by an enclosure (40) of the drying device (10). The drying device (10) has a processing zone (32) arranged between the holding zone (26) and the cooling zone (30), in which at least one robot (34) is arranged. At least one robot (34) is trained to apply at least one sealing material (36) to the body (12).Furthermore, the invention relates to a method for drying a body (12) for a motor vehicle.