Plug Pin Housing Sealing Through Localized Casting Cutouts
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Solution Overview
Problem
Existing methods for sealing plug pins in housings, such as 'stitching,' often result in permeable connections that allow fluids and gases to pass through, and the use of casting compounds can damage the plug pins or prevent ventilation during the sealing process.
Innovation Solution
A method and device that utilize cutouts in the housing to introduce casting compound between the plug pin and the housing, ensuring a fluid-tight seal without contacting the plug pin ends, allowing for sealing after other interior regions are sealed, and potentially using a single opening or two cutouts for efficient compound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If casting compound is used to seal the insertion opening from the outside of the housing, then a tight seal is achieved, but the plug pins will be wetted with casting compound and lose their functionality
Solution Approach 1:
The sealing process is localized to specific regions (cutouts) in the housing that are positioned away from the plug pin ends. The casting compound is introduced only into these localized cutout regions to seal the intermediate space without contacting the plug pin ends, thus achieving local sealing without damaging the plug pins.
Solution Approach 2:
The housing is divided into multiple regions: plug pin insertion regions and separate cutout regions for sealing. This segmentation allows the sealing operation to be performed in isolated areas that do not interfere with the plug pin functionality, separating the sealing function from the electrical connection function.
2Reliability
If the intermediate space is sealed with casting material before sealing the interior of the housing, then the plug pin region is sealed, but the region around the plug pin can no longer be used for ventilation during the sealing process
Solution Approach 1:
The cutouts are pre-formed in the housing at positions that allow ventilation access to the intermediate space before the final sealing operation. This preliminary preparation enables the housing interior to be sealed first while maintaining ventilation paths, and the plug pin region sealing is performed subsequently without interfering with the ventilation process.
3Ease of manufacture
If plug pins are introduced into the housing in a stitching manner, then a low-cost method is achieved, but a permeable connection remains between the surrounding environment and the interior of the housing
Solution Approach 1:
The housing structure is segmented to include separate cutout regions that provide access to the intermediate space between the plug pin and housing. This segmentation enables the application of stitching for cost-effective plug pin insertion while adding localized sealing regions to achieve the required sealing tightness, combining both low-cost manufacturing and reliable sealing.
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 approach provides a technically simple and effective sealing of the intermediate space between the plug pin and the housing, maintaining the functionality of the plug pins and allowing for post-sealing ventilation, without pre-treating the plug pins, and can be quickly and reliably implemented.
Implementation Method 1
introducing casting compound into the at least one cutout in such a way that the casting compound reaches two oppositely situated sides of the plug pin, and that the casting compound seals the region between the plug pin and the housing, in particular in fluid-tight fashion, preferably airtight fashion
Implementation Method 2
and curing of the casting compound
Data Source
AI summary
A method for sealing a plug pin in a housing. The housing has at least one cutout for sealing a region between plug pin and the housing. The method includes: providing the housing having the plug pin, the plug pin contacting the housing in two edge regions of the plug pin situated opposite one another and running along a direction of insertion, and forming in the edge regions a positive-fit connection with the housing; introducing casting compound into the at least one cutout in such a way that the casting compound reaches two oppositely situated sides of the plug pin, and the casting compound seals the region between the plug pin and the housing in fluid-tight fashion, and the casting compound does not come into contact with the two ends of the plug pin situated opposite one another along the direction of insertion; and curing of the casting compound.