Threaded Insert Nut Recesses for Clean Resin Embedding
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Solution Overview
Problem
Existing insert nuts generate debris when press-fitted into resin molded articles, which can contaminate clean environments such as semiconductor wafer processing equipment, limiting their use in devices requiring cleanliness.
Innovation Solution
A cylindrical insert nut with an outer surface featuring external threads and recesses to accommodate debris, along with tapered portions and a flange to prevent debris from appearing on the embedding target surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the insert nut is press-fitted into the resin molded article in a threaded manner, then the insert nut can be securely embedded in the resin product, but debris is generated during the press-fitting process
Solution Approach 1:
The harmful debris is extracted from the gap between the insert nut and resin molded article by providing recesses on the outer surface of the insert nut. These recesses capture and contain the debris generated during press-fitting, preventing it from contaminating the clean environment or appearing on the embedding target surface.
Solution Approach 2:
The debris generation issue is converted into a beneficial containment system. The recesses are strategically designed to capture debris, and the tapered portions guide the debris into these recesses during the press-fitting process, transforming the harmful debris into a contained element that does not affect the clean environment.
2Object-affected harmful factors
If debris remains in the gap between the insert nut and the resin molded article, then the debris may appear on the pad or adhere to the semiconductor wafer, but implementing debris countermeasures is limited
Solution Approach 1:
The outer surface of the insert nut is segmented into multiple recesses distributed around the circumference. This segmentation allows debris to be captured at multiple locations simultaneously, ensuring comprehensive coverage and effective prevention of debris contamination regardless of the debris generation location during press-fitting.
3Object-generated harmful factors
If a tapered portion is formed on the insert nut, then debris can be guided into the recesses, but the manufacturing complexity increases
Solution Approach 1:
The tapered portions are provided locally only at specific regions of the insert nut where debris generation is most likely to occur during press-fitting. This localized approach maintains debris control effectiveness while minimizing the increase in manufacturing complexity compared to providing tapers over the entire surface.
Data Source
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AI summary
[Problem to be Solved] To provide an insert nut that adequately addresses an issue of cutting debris. [Solution] An insert nut in cylindrical shape, which has an outer surface portion 150 formed with a screw portion and multiple recesses 160 that accommodate cutting debris generated when an insert nut body is screwed into an embedded target through the screw section in a threaded manner.