Axial Air Moving Device Blades with Overlapped Axial Projection
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Solution Overview
Problem
The radial demolding method restricts the geometrical shape of blades in axial air moving devices, limiting the ability to achieve ideal shapes necessary for high fluid performance, as it requires simple geometries and prevents the manufacture of blades with overlapped areas in axial projection.
Innovation Solution
The axial demolding method is used to part the blades into sub-blades with non-overlapped areas, allowing for the creation of molds and subsequent injection molding to form blades with continuous, curved surfaces, enabling the production of blades with complex geometries that cannot be manufactured via radial demolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the radial demolding method is adopted, then mass production is enabled, but the blade geometry is restricted to simple shapes
Solution Approach 1:
The blade is divided into multiple segments along the axial direction, creating several sub-blades that are non-overlapped in axial projection. This segmentation allows each sub-blade to be manufactured using radial demolding while the complete assembled blade achieves the desired complex overlapping geometry for high fluid performance
Solution Approach 2:
The invention transitions from single-dimension (radial) demolding to multi-dimensional manufacturing by arranging sub-blades in the axial direction. The sub-blades are positioned at different axial heights to create the overlapping projection effect, adding the axial dimension to the manufacturing approach
2Reliability
If blades are designed with overlapped areas in axial projection, then fluid performance is improved, but radial demolding cannot be used
Solution Approach 1:
The complex overlapping blade geometry is segmented into multiple sub-blades that can be individually manufactured using standard radial demolding techniques. Each sub-blade maintains the required geometric precision while the overall assembly achieves the desired overlapping configuration for optimal fluid dynamics
Solution Approach 2:
Multiple sub-blades manufactured separately through radial demolding are merged together in the axial direction to form the complete blade assembly. This merging process combines the manufacturing simplicity of radial demolding with the fluid performance benefits of overlapping blade geometries
Data Source
AI summary
A manufacturing method of an axial air moving device. A model of the axial air moving device includes a hub and blades. The axial projection of blades is partially overlapped in the axial direction of the hub. The model of the axial air moving device is parted in the axis direction of the hub. The blades are divided into multiple parting models non-overlapped in the axial projection. A mold manufacture using axial demolding and an injection molding are performed and the parting models are connected. Therefore, the axial air moving device with overlapped blades and better fluid performance is achieved through the axial demolding method.