Middle Frame Blocking Member Prevents Resin Intrusion
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Solution Overview
Problem
The existing manufacturing process of electronic device middle frames, which involves forming a plastic member on a metal inner frame using injection molding, often results in plastic entering the mounting holes, compromising geometric precision and clean edges, and potentially blocking the holes.
Innovation Solution
Incorporating a blocking member made of materials like iron, placed between the inner frame and the covering member, which prevents the liquid resin from entering the mounting holes during the molding process, ensuring unobstructed holes and improved bonding strength between the frame components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection molding is used to form plastic member on metal inner frame, then productivity is improved, but manufacturing precision deteriorates due to plastic entering mounting holes
Solution Approach 1:
A blocking member is pre-installed in the mounting holes of the metal inner frame before the injection molding process. This preliminary action prevents plastic material from entering the holes during molding, ensuring geometric precision is maintained while allowing continuous high-speed production through injection molding.
Solution Approach 2:
The blocking member serves as an intermediary element between the metal inner frame and the plastic covering member. It temporarily occupies the mounting holes during the molding process to prevent plastic intrusion, then is removed afterward to leave clean, precise holes for component installation.
2Manufacturing precision
If blocking member is added to prevent plastic entry, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The blocking member is designed as a simple, inexpensive, disposable component that is installed temporarily during molding and then discarded. This approach maintains clean hole edges without requiring complex permanent structures, as the blocking member serves its purpose and is removed, leaving no residual complexity.
Solution Approach 2:
The blocking member is extracted or removed from the mounting holes after the injection molding process completes. This extraction leaves the holes clean and unobstructed, achieving precise edges without permanently adding complex structures to the final product.
Data Source
AI summary
A middle frame includes an inner frame, a blocking member, and a covering member. The inner frame includes an outer surface and an inner surface opposite the outer surface. The inner frame further comprises at least one mounting hole penetrating the outer surface and the inner surface, the at least one mounting hole comprises an opening at the outer surface. The covering member covers the outer surface, and the blocking member is disposed between the covering member and the outer surface so as to cover the opening of the at least one mounting hole at the outer surface. An electronic device including the middle frame and a method for manufacturing the middle frame are also provided.