Electronic Frame Sealing Structure for Injection Overflow Control
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Solution Overview
Problem
The sealing effect is poor in electronic devices due to the excessive thinness of alloy components, leading to plastic overflow and poor bonding between alloy and plastic parts during manufacturing.
Innovation Solution
A frame design incorporating a flow blocking part that redirects plastic flow during injection, ensuring proper sealing by distributing pressure and preventing plastic overflow, while allowing for a thinner and lighter structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the alloy is made thinner to reduce device weight and thickness, then the device becomes lighter and thinner, but the sealing effect deteriorates because the alloy is excessively thin
Solution Approach 1:
The patent divides the sealing function into two parts: the thin alloy body provides weight reduction, while a separate flow blocking part (made of plastic or metal) provides the sealing function. This segmentation allows the alloy to be thin without compromising sealing reliability, as the flow blocking part compensates for the thinness of the alloy at the sealing location.
Solution Approach 2:
The flow blocking part acts as an intermediary element between the injection molding process and the thin alloy body. It intercepts the plastic flow before it reaches the thin alloy, preventing direct pressure application that would cause leakage. This intermediary structure enables the thin alloy to maintain both its weight-saving thinness and sealing capability.
2Length of stationary object
If the alloy is made thinner to meet ultra-thin design requirements, then the design requirement is met, but the sealing effect deteriorates due to excessive thinness
Solution Approach 1:
The sealing function is segmented from the thin alloy structure. The flow blocking part is introduced as a separate component that handles the sealing task, allowing the alloy to be made as thin as required without compromising sealing quality. The flow blocking part compensates for the reduced thickness of the alloy.
Solution Approach 2:
The flow blocking part serves as an intermediary that protects the thin alloy from direct plastic injection pressure. By placing this blocking structure at the sealing location, the patent ensures that the thin alloy does not directly bear the injection pressure, thereby maintaining sealing quality despite the reduced thickness.
3Productivity
If plastic is injected at high pressure to form the second body, then the injection efficiency is high, but the plastic overflows along the sealing surface of the first body
Solution Approach 1:
The flow blocking part is designed in advance to counteract the harmful effect of plastic overflow. By positioning this blocking structure at the sealing location before injection, the patent creates a preliminary barrier that prevents plastic from flowing along the sealing surface, even under high injection pressure. This preliminary protective measure eliminates the need for reduced injection pressure.
Solution Approach 2:
The patent converts the high injection pressure, which would normally cause harmful plastic overflow, into a beneficial force. The flow blocking part utilizes the injection pressure to push plastic through a controlled channel rather than allowing it to overflow along the sealing surface. Thus, the harmful high pressure is redirected to achieve proper filling of the second body without overflow.
4Reliability
If the first body and second body are bound tightly to ensure sealing, then the sealing effect improves, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the flow blocking function with the sealing surface structure. The flow blocking part is integrated into the molding process and combines with the sealing surface in a single manufacturing step. This merging eliminates the need for separate sealing mechanisms or additional assembly steps, thereby improving sealing effect without significantly increasing manufacturing complexity.
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
Enhances sealing reliability, improves manufacturing quality, and supports a lighter and thinner design by effectively managing plastic flow and ensuring secure bonding between alloy and plastic components.
Implementation Method 1
flowing plastic is blocked by a mold placed at a position of the flow blocking part, flows along a channel at a bottom end of the mold to the first body
Implementation Method 2
contacts the first body, to generate a pressure in the first direction X on the first body
Data Source
AI summary
This application relates to a frame and an electronic device. The frame includes a first body and a second body. The first body includes a sealing surface, and the second body includes a flow-blocking part sunken toward one side. An extension surface of the sealing surface intersects the flow blocking part in a first direction. Because the flow blocking part is designed, in a plastic injection process, a pressure of injected plastic on the first body is reduced, to ensure that, after sealing processing is performed on the sealing surface of the first body, the plastic does not continuously flow in the first direction. This ensures sealing reliability of the sealing surface, improves sealing effect of the first body, enables the first body and the second body to be bound well, and ensures smooth manufacturing of the frame.