Injection-Molded Fitting Insert for Low-Loss Angled Flow
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Solution Overview
Problem
Existing fittings suffer from significant fluidic losses due to manufacturing limitations in the angled transition areas, and previous solutions either compromise durability with large separating surfaces or are excessively complex in production.
Innovation Solution
A fitting design featuring a housing wall with an injection zone for a cohesively connected insert, utilizing flange and collar elements to maximize the surface area of contact, ensuring a strong and efficient connection while minimizing material usage and production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the fitting is divided into shells to optimize flow, then fluidic losses are reduced, but the separating surface area increases which negatively affects durability
Solution Approach 1:
The fitting is divided into a housing and an insert that can be manufactured separately and then connected. This segmentation allows the insert to be optimized for flow characteristics while the housing provides structural support, reducing fluidic losses without compromising durability through the careful design of the connection interface.
Solution Approach 2:
The insert is placed within the housing, creating a nested structure where the insert (inner component) is housed within the outer housing. This nested arrangement allows the flow-optimized insert to be protected by the structurally sound housing, maintaining both flow efficiency and durability.
2Loss of energy
If a flow guide body is added to improve branch area flow, then fluidic losses are reduced, but production complexity increases extremely
Solution Approach 1:
The flow guide body is merged with the insert component, combining the flow optimization function with the structural insert in a single integrated part. This merging eliminates the need for separate assembly steps and reduces production complexity while maintaining the flow improvement benefits.
3Reliability
If the insert connection area is increased to improve durability, then the connection strength is enhanced, but the production time and complexity increase
Solution Approach 1:
The housing is prepared with a pre-formed connection interface (including features like flange elements and injection zones) before the insert is attached. This preliminary preparation allows for rapid and reliable connection of the insert without requiring time-consuming post-assembly operations, thus enhancing connection strength while maintaining production efficiency.
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 design optimizes fluid flow by reducing pressure losses, enhances durability, and simplifies production by allowing for a robust and efficient connection between the insert and housing wall, addressing the limitations of previous solutions.
Implementation Method 1
The insert is injection-molded onto the housing wall in such a way that the opening is covered
Implementation Method 2
an insert (9), which is cohesively connected to the housing wall (2)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fitting (1), in particular made of plastic, comprises a housing wall (2) which delimits a flow channel (3) which extends from a fitting inlet (4) to a fitting outlet (5). The flow channel (3) comprises a first channel section (6) extending along a first central axis (M6) and a second channel section (7) extending along a second central axis (M7). In the area of the transition (8) between the first channel section (6) and the second channel section (7), an insert (9) is inserted into an opening (11) through the housing wall (2), which insert (9) is integral with the housing wall (2) related. The housing wall (2) has an injection molding zone (14) in the area of the opening (11), and the insert has an injection molding zone (41), the insert (9) and the housing wall ( 2) to be connected. The housing wall (2) and/or the insert (9) have at least one element (26, 27, 39, 40) which enables the area of the injection zones (14, 41) to be enlarged.