Vacuum laminating machine, also known as screen press machine, is a professional device used for replacing burst screens in mobile phones. It was originally used in the production of large factory mobile phone LCD screens, and later improved and reduced to become a small device used in small mobile phone repair shops in society. Using OCA dry film as a medium under pressure in a vacuum environment to seamlessly bond the LCD screen and glass cover plate together. The equipment involved includes: separators, vacuum bonding machines, vacuum pumps, air compressors, defoamers, and support machines.
Before operation, we first remove the LCD assembly of the phone from the original phone and the middle frame or bracket. The specific operation process is as follows:
1. Place the LCD screen assembly with the shattered cover glass on the separator, and then separate the shattered cover glass. After placing the LCD screen assembly, the cover glass should be attached to the separator panel, and the wire should face itself. Enter the steel wire from the end without the wire, and then separate it. When the wire is separated to a similar position, exit the wires from both angles of the LCD screen to avoid damaging the wire. After the separation is completed, stop separating when you feel like you can pick up the LCD, and then rotate the parallel glass to remove the LCD.
2. After separating the LCD, it is necessary to remove the residual glue on the LCD. Generally, the original glue is difficult to clean. Therefore, in order to increase efficiency, our choice is to directly remove the polarizing film under the residual glue. This way, the cleaning will be cleaner. To remove the polarizing film, we can directly use a blade for cutting and cleaning, or use a heated soldering iron for treatment. It depends on personal preference.
3. After removing the polarizer and residual adhesive, we need to perform the final dust cleaning. I need to use a dust-free cloth with a small amount of white oil to clean the dust, and pay attention to the quality of the dust-free cloth not being too poor, so as not to get dirtier with more wiping.
4. After cleaning the LCD screen, we need to reattach the polarizer for restoration. The polarizer needs to be purchased from a dedicated model for attachment to avoid different models being unusable.
5. After pasting the polarizer, the next step is to paste the OCA dry film. When pasting the dry film, pay attention to tearing off the thin film on the polarizer first, and then carefully check for dust. Any dust must be cleaned thoroughly before pasting the OCA dry film. The OCA dry adhesive screen should be moved slightly to the next line of adhesive at the cable end for static electricity removal, but only Apple's LCD screen needs to do this.
6. After all of these are completed, the next step is to use a dedicated mold to align the LCD and then place a new glass cover plate.
7. After alignment, the next step is to place the entire LCD assembly into the tray working position of the vacuum bonding machine, and then start the vacuum bonding machine for bonding. The main parameters of the vacuum bonding machine are time, pressure, and temperature, which need to be controlled well. Generally, when placing the LCD screen into a vacuum bonding machine, the cover glass is facing upwards, because the heating function of the vacuum bonding machine is usually set on the pressure plate pressed down in the vacuum bonding machine.
8. After the vacuum bonding machine is used, it is usually done. If there are some small bubbles on the LCD screen, they can be placed in a dedicated defoamer for defoaming.
9. After the defoaming is completed, the installation can be carried out. However, for Apple's single laminated single cover LCD screen, an additional pressing bracket is required. But if the pressed bracket is an integrated bracket, a separate pressing bracket is not needed.
The above is Baode's introduction to "How to use a vacuum bonding machine to replace the glass cover of a mobile phone screen". Basically, the operation of various screens is similar, just pay attention to the details! Which is a good manufacturer of proton membrane bonding equipment and proton exchange membrane in Guangzhou and Shenzhen? Recommend Baode Precision, which is a solution provider and equipment integrator with vacuum technology as its core, covering display touch series, hydrogen fuel cell, solar photovoltaic, semiconductor series, factory automation series manufacturing equipment.
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