From soaking to gas testing: 3 minutes to understand the whole process of the technological revolution of the airtightness and waterproofness testing of cell phone cases

The waterproofing ability of your phone case determines whether your phone lives or dies in the event of an accidental fall into water. But do you know how these water resistance properties are verified?

Today, we dive into cell phone casesAir tightness testing equipmentHow to perform waterproofing tests. This topic is of great importance to cell phone manufacturers, quality engineers and consumers - after all, theThe waterproof performance of a cell phone case is directly related to the core protection value of the productThe

I. The "Dead End" of Traditional Detection Methods

Fatal flaws of the immersion test

In the past, the waterproof test was simple and crude: throw the phone directly into the water and observe the bubbles to see if the water will penetrate. This immersion test method seems intuitive, but there are unavoidable problems:

• The cost risk is ridiculously high: Once the case is defective, the real phone used for testing is directly scrapped. Imagine the potential loss of thousands of dollars of equipment for every product tested, who can afford this cost?
• Ridiculously inefficient: The whole process is time-consuming and lengthy, and is completely unsuitable for the fast-paced demands of modern automated production lines.
• The results were horribly rough: You can only tell if you are "leaking" or "not leaking", you can't quantify the extent of the leak, let alone pinpoint the problem. This is not helpful for product improvement.
• Subjectivity is outrageous: Relying on the human eye to observe bubbles and water trails, different inspectors may come to completely different conclusions.

These pain points are forcing the industry to find better solutions.

Second, airtightness testing: the core breakthrough of the technological revolution

Brilliant idea to simulate water pressure with gas

Modern cell phone case gasTightness testing equipmentA brilliant thought was employed:Simulating water pressure with gas. The logic at the heart of this approach is that the same gaps that allow water to penetrate will allow gas to pass through. And gases are more sensitive than water and can detect more subtle leaks.

Precision Engineering AirtightnessSpecialized equipment such as this converts complex waterproof rating requirements into accurately measurable gas leakage using either the pressure drop principle or the flow principle. This conversion is not only scientific, but more importantly practical.

Inspection process: a precise and efficient process chain

Step 1: Build a sealed test environment

The tested phone cases were placed in a customizedSealing CavityThe chamber is precisely fitted to the outer contour of the phone case to form a completely enclosed test space. The chamber is then pressurized or vacuumed to simulate different water pressure environments.

IP68 waterproof standardThe water pressure, which is required to remain at a depth of 2 meters for 30 minutes without water ingress, is converted into a corresponding air pressure value by means of a precise conversion formula.

Step 2: Set precise test parameters

Step 3: Two core detection principles

• Pressure drop method of detection: Fill the sealed chamber with gas at a set pressure and observe the pressure change. If there is a leak in the case, the pressure in the chamber will gradually decrease.High Precision Pressure SensorsCapable of capturing extremely small pressure variations with an accuracy of up to parsec level.
  This method is relatively low cost, easy to operate, and suitable for batch inspection of most cell phone cases.
• Flow method detection: Gas is continuously supplied to the chamber to maintain a constant pressure, and the extent of the leak is determined by measuring the flow rate of the supplemental gas. The more severe the leak, the greater the flow of supplemental gas required.
  The flow method is faster and canAccurate quantification of leakageIt is especially suitable for in-line inspection on automated production lines.

Step 4: Intelligent Data Analysis and Determination

Precision Engineering'sAir tightness testing equipmentThe built-in intelligent control unit collects and analyzes key data such as pressure and flow rate in real time. The equipment can not onlyGive a clear pass/fail decisionThe program also displays the specificLeak rate valuesThe quality of the product is a key factor in the quality of the product, and provides an accurate basis for quality improvement.

possessTest data can be stored and traced, forming a complete quality management chain.

III. Technology Application: Perfect Transformation from Laboratory to Production Line

Technical Advantages of Precision Engineering Airtightness

In the field of airtightness testing of consumer electronics such as cell phone cases, thePrecision Engineering AirtightnessWith deep technical accumulation and rich application experience, we provide a full range of solutions:

• Detection accuracy is at its ultimate: Even microscopic holes the size of a hair are accurately captured, easily meeting or exceeding strict waterproofing standards such as IP67 and IP68.
• Production efficiency has increased dramatically: Supporting full automation integration, continuous on-line inspection, individual product inspection time is reduced to tens of seconds or even a few seconds, perfectly matching the modern production beat.
• Say goodbye to destructive testing once and for all: Non-destructive testing avoids the potential damage to products caused by traditional water testing and significantly reduces scrap rates and testing costs.
• Systematization of data management: Provide detailed test data report and complete quality traceability system, providing scientific basis for continuous process optimization.
• Customized solutions: For different models and shapes of cell phone cases, professional tooling fixtures are designed to ensure the stability and accuracy of the test results.

Deeper expression of business value

This is accomplished through the use ofPrecision EngineeringAir tightness testing equipmentBy conducting waterproofing tests on cell phone cases, manufacturers gain more than just a technological upgrade, they areOverall improvement of market competitiveness::

• Every cell phone case that leaves the factory is rigorously verified, providing a solid guarantee of product quality. This translates directly into consumer trust and becomes an important part of brand value.
• When consumers know that the cell phone case they are buying has undergone such sophisticated testing, the emotional value and marketability of the product is naturally significantly enhanced.

IV. Technology foresight: the continuing evolution of testing standards

As the waterproof performance requirements of consumer electronics products continue to increase, airtightness testing technology continues to evolve. Future directions include:

• Higher inspection accuracy to detect smaller defects;
• Faster inspection speeds for more efficient production needs;
• Smarter data analytics for deeper quality insights.

If you are facingWaterproof testing of cell phone cases and related electronic productsor want to learn more about the technical challenges of theAir tightness testing equipmentinformation, the professional team of Precision Engineering Airtight is always ready to provide you with consultation and customized solutions.

Original Statement: This article was written byShenzhen Jingchenggongke Technology Co., Ltd.Written by the technical team, reproduced with attribution.Data sources: Precision Engineering internal test data and customer cases.