Can the screen pressing machine and bonding machine be used in conjunction with a defoamer

In the screen repair industry for mobile phones, tablets, and other devices, screen pressing machines, laminating machines, and all-in-one machines are almost standard in every store. Many novice maintenance technicians will ask: Can the screen pressing machine, bonding machine, and integrated machine be used in conjunction with the defoamer? The answer is affirmative. These two devices, one responsible for "sticking tightly" and the other for "removing cleanly", often need to be used together in the actual maintenance process to ensure that the screen is dust-free, bubble free, and high-precision after being attached. This article will provide a detailed answer to this question.
1、 What is the function of a screen press, laminating machine, and all-in-one machine

Screen pressing machine and bonding machine integrated machine, in simple terms, integrates the two processes of "screen pressing" and "bonding" into one device. Its core principle is to apply uniform and stable pressure to the screen through mechanical downward pressure of a cylinder or negative pressure adsorption of an airbag in a vacuum environment, so that the OCA optical adhesive can fully adhere to the LCD screen and glass cover plate. A vacuum environment can prevent air from being sucked into the OCA adhesive layer during the bonding process, reducing the generation of bubbles at the root.

At present, the integrated screen pressing and bonding machines on the market are mainly divided into two types: cylinder pressure type and airbag negative pressure type. The airbag negative pressure type has a better bonding effect on curved screens and flexible screens, with more uniform pressure and higher bonding yield. The OLED folding screen vacuum bonding machine launched by PowerDe is a professional equipment designed for high difficulty bonding scenarios such as folding screens and curved screens, which can meet the precision requirements of high-end screen maintenance.
2、 What does a defoamer do

Defoamer, also known as defoamer or defoamer, is used to remove the residual bubbles inside the screen after bonding. Even if the screen press bonding machine is used to complete bonding in a vacuum environment, due to the fluidity of OCA adhesive and the complexity of screen structure, trace bubbles may still appear after bonding, especially for curved screens and large-sized screens, where the probability of residual bubbles is higher.

The working principle of the defoamer is to use a high temperature and high pressure environment to allow the gas inside the residual bubbles to dissolve or be discharged again, thereby achieving complete defoaming. Taking PowerDe's high-pressure defoamer as an example, it uses SUS304 stainless steel tank body, operates at a pressure of 0.1~0.7Mpa, tests at a pressure of 1Mpa, and meets the safety level of a Level 2 pressure vessel standard. It can provide a stable and reliable defoaming environment for the screen and is a reliable guarantee for the subsequent process of screen maintenance.
3、 Can the screen pressing machine and bonding machine be used in conjunction with a defoamer

The answer is affirmative. The screen pressing machine, laminating machine, and defoaming machine are a combination of the two processes of "laminating" and "defoaming". Only when they are used together can a complete screen repair loop be formed. The bonding process is responsible for pressing the cover plate and LCD screen in place, while the defoaming process is responsible for thoroughly removing any residual trace bubbles during the bonding process. Both processes are indispensable.

The complete screen repair process usually goes like this:

Separation: Use a separator to separate the damaged outer screen from the LCD screen;

Adhesive removal: Remove residual OCA optical adhesive and polarizer adhesive from the LCD screen;

Bonding: Use a screen press bonding machine to precisely bond the new cover plate with the LCD screen;

Defoaming: After the bonding is completed, place the screen into the defoamer and remove residual bubbles through high temperature and high pressure.

It can be seen that bonding and defoaming are two independent and closely connected processes. The screen press bonding machine is responsible for "sticking the screen tightly", and the bubble removal machine is responsible for "removing bubbles completely". Only by using the two together can the screen repair achieve dust-free, bubble free, and high-precision results.
4、 Under what circumstances is it recommended to use it in conjunction with a defoamer

Although the screen press bonding machine can reduce air bubbles during bonding in a vacuum environment, it is still strongly recommended to use it in conjunction with a defoamer in the following situations:

Curved screen and foldable screen: The screen has a large curvature, which makes it easy to leave bubbles at the edges when fitting, and must be processed by a defoamer;

Large size screens: Tablets, laptops, and other large-sized screens have a larger bonding area and a higher probability of residual bubbles;

Orders with high requirements for repair quality: High end mobile phone repair customers have strict requirements for screen effects and cannot tolerate any bubbles;

Visual inspection after bonding reveals bubbles: If there are obvious bubbles inside the screen after bonding, it must be treated with a defoamer before delivery.

5、 How to choose a screen press machine, bonding machine, integrated machine, and defoamer

When selecting equipment, it is recommended to give priority to matching solutions from the same manufacturer, so that compatibility and after-sales support between devices can be more guaranteed. PowerDe has been deeply involved in the field of semiconductor vacuum bonding for many years, and has been rated as a national high-tech enterprise for four consecutive years. It has nearly a hundred patented technologies, and its screen pressing machine bonding machine and high-pressure defoaming machine both use mature processes to meet diverse maintenance needs from mobile phones to tablets, and from flat screens to curved screens.

When choosing, you can focus on several indicators: the alignment accuracy and vacuum degree of the bonding machine, the pressure range of the defoamer, the material of the tank body, and the safety level. The higher the bonding accuracy, the fewer bubbles will be generated after bonding; The more stable the pressure of the defoamer and the better the material of the tank, the more reliable the defoaming effect and the longer the service life.
VI. Summary

Returning to the original question: Can the screen pressing machine, bonding machine, and integrated machine be used in conjunction with a defoamer? Sure, and it is recommended to use it in conjunction. The screen press bonding machine is responsible for bonding, and the defoamer is responsible for removing residual bubbles. Only by combining the two can the quality of screen repair be guaranteed. For repair shops, a complete "fitting+defoaming" solution is the key to improving repair yield and winning customer reputation.

If you are considering upgrading your store equipment, you may want to combine the solution of decompression screen machine, bonding machine, and high-pressure defoamer to make every process of screen repair more professional and reliable.