Composite Air Dryer Cartridge Base Plate for Lower Weight
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Solution Overview
Problem
Conventional air dryer cartridges for vehicles are heavy and complex to manufacture due to metal base plates, which increase manufacturing costs and vehicle weight, and contribute to fuel consumption.
Innovation Solution
A base plate for an air dryer cartridge comprising a plastic plate with a tubular metal insert, allowing for a secure mechanical and pneumatic interface with the air dryer body, manufactured through overmolding or ultrasonic welding, reducing weight and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal base plate is used to provide mechanical and pneumatic interface, then the air dryer cartridge can be securely affixed to the air dryer body, but the weight and manufacturing complexity increase
Solution Approach 1:
The base plate is constructed as a composite structure combining a plastic plate with a metal insert. The plastic plate provides the base structure and pneumatic interface, while the metal insert embedded within it provides the threaded fixing structure for secure attachment. This composite approach reduces overall weight compared to a fully metal base plate while maintaining the necessary mechanical strength and attachment capability.
2Reliability
If a metal base plate is used to provide mechanical and pneumatic interface, then the air dryer cartridge can be securely affixed to the air dryer body, but the manufacturing complexity and costs increase
Solution Approach 1:
The base plate is divided into two functional segments: a plastic plate portion that provides the pneumatic interface and base structure, and a separate metal insert that provides the threaded fixing structure. This segmentation allows each component to be manufactured using optimized processes (injection molding for the plastic plate, machining or forming for the metal insert) and then assembled together, reducing overall manufacturing complexity compared to machining a complete metal base plate.
Solution Approach 2:
The metal insert acts as an intermediary element that bridges the plastic plate and the air dryer body. Instead of directly threading the plastic plate into the air dryer body (which would be difficult or impossible), the metal insert with external threads engages with the air dryer body, providing the necessary mechanical interface while the plastic plate provides the pneumatic sealing surface.
3Strength
If an all-metal base plate is used, then structural strength is sufficient for secure attachment, but weight reduction objectives are compromised
Solution Approach 1:
The base plate structure uses local quality by concentrating metal material only where it is most needed - in the insert that provides the threaded fixing structure for attachment. The rest of the base plate, which primarily needs to provide pneumatic sealing and structural support, is made of lighter plastic material. This localized use of metal maintains necessary strength at critical points while minimizing overall weight.
Data Source
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AI summary
An air dryer cartridge (10) comprises a base plate (12). The base plate (12) is configured for affixing the air dryer cartridge (10) to an air dryer body. The base plate (12) comprises a plastic plate (50) comprising a central passage (60) and a tubular metal insert (40) received in the central passage (60).