Pump Casing Venting Chamber Insert Design
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Solution Overview
Problem
Existing pump housings face manufacturing challenges due to the need for demolding cores, which results in openings that require manual closure with plugs, risking leakage and increasing the complexity and time of the manufacturing process.
Innovation Solution
Designing a pump housing where the venting chamber is open at the lower end, allowing an insert to form the bottom and connect with the channel, eliminating the need for additional demolding openings and reducing the risk of leakage by ensuring pressure equalization and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a core is used to form the channel during injection molding, then the channel structure can be created, but an opening remains in the housing wall requiring manual closure with a plug
Solution Approach 1:
The core is designed with a hollow interior space that nests the insert within it. The insert forms the bottom of the venting chamber and is positioned inside the core's hollow space. This nested arrangement allows both the core and insert to be removed together as a single unit through the opening at the bottom of the mold, eliminating the need for separate demolding operations and plug installation.
Solution Approach 2:
The venting chamber bottom is segmented from the main housing structure by using a separate insert component. This insert is introduced through the core during molding and forms the bottom closure of the venting chamber. The segmentation allows the bottom to be formed independently while maintaining integration with the overall housing structure, eliminating the need for additional closure plugs.
2Reliability
If a plug is used to close the demolding opening, then the opening is sealed, but leakage risk increases and manufacturing time increases
Solution Approach 1:
The insert automatically serves as the bottom closure of the venting chamber through its own structural design. The insert has a rim that rests on the projection of the partition wall, self-positioning and self-securing itself without requiring additional plugs or manual sealing operations. The system uses its own components to achieve the sealing function, eliminating external plug elements.
Solution Approach 2:
The function of forming the venting chamber bottom and the function of sealing the channel are merged into a single insert component. This insert simultaneously provides structural closure for the venting chamber and seals the channel opening, combining multiple functions into one element that is installed and sealed in a single operation during the molding process.
3Stability of the object's composition
If the venting chamber is closed with a solid base, then the structure is complete, but manufacturing complexity increases due to additional process steps
Solution Approach 1:
The insert is pre-positioned within the core's hollow space before the injection molding process begins. The core is designed with the insert already in place, so that when the housing material is injected, the insert is automatically positioned to form the bottom of the venting chamber. This preliminary arrangement eliminates the need for post-molding assembly steps to install the venting chamber bottom.
Data Source
AI summary
The casing (1) has a deaeration chamber (3) laterally connected to an air separation chamber (2) and comprising an opening (22) at an upper end of the separation chamber for discharging air outwardly. The deaeration chamber is opened towards a channel (5) at a lower end of the deaeration chamber. An insert (15) is brought into the deaeration chamber by the opening such that the insert forms a base of the deaeration chamber in an inserted state. The insert limits the deareation chamber towards the channel. The deaeration chamber is separated by a chamber wall (31). An independent claim is also included for a method for manufacturing a pump housing.