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Which equipment is best for laser cutting of various types of films such as PET, PI, FPC?
Film is a thin, soft, transparent sheet. Made of plastic, adhesive, rubber or other materials.
The scientific explanation of thin film is: a 2-dimensional material formed by atoms, molecules or ions deposited on the surface of a substrate.
Examples: optical film, composite film, superconducting film, polyester film, nylon film, plastic film, etc. Films are widely used in electronic appliances, machinery, printing and other industries.
Thin film materials are thin metal or organic layers with a thickness ranging from a single atom to a few millimeters.
Electronic semiconductor functional devices and optical coatings are the main applications of thin film technology. Common films include PET, PI, FPC, etc.
In order to improve the material's absorption of laser energy, the cutting surface is vertical and smooth, the heat-affected area is smaller, and curling is eliminated.
Precision and low heat consumption laser equipment are needed to process the above materials to solve the shortcomings of jagged edges, yellowing, blackening, and severe curling.
Beyond Laser generally recommends several types of thin film laser cutting equipment:
1. For common high-speed CO2 laser film cutting machines, the opposite cutting edge has a slight melting phenomenon.
2. Nanosecond UV laser cutting can be used. The cutting edges are smooth, burr-free, and slightly blackened.
3. If the product cutting requirements are very high and the budget is generous, picosecond UV or femtosecond UV or green light laser cutting machines can be used.
It can effectively solve the problems of speed and edge burrs, blackening and carbonization, and curling. The cross section is smooth and flat and beautiful.
The laser cutting developed by Beyond Laser for various types of thin films has the following highlights.
1. Adopting granite base, high-speed and high-precision linear motor and negative pressure adsorption system, precise positioning and high processing stability; integrated closed structure, safe and reliable performance.
2. Selecting precision lasers from international first-line brands, with advantages such as good beam quality, small focused spot, uniform power distribution, small thermal effect, small slit width and high cutting quality
3. After years of process testing and optimization, the combination of high-precision, low-drift galvanometer and fast coreless linear motor system platform can maintain high precision of micron level while cutting quickly;
4. Self-developed control software based on Windows system, easy-to-operate Chinese interface, friendly and beautiful, powerful and diverse functions, simple and convenient operation.
5. Adopting high-precision CCD automatic positioning, high precision, no need for manual intervention, simple operation, realizing the same type of one-button mode, greatly improving production efficiency;
6. Environmental protection standards: The suction system can eliminate all cutting exhaust gas, avoiding harm to operators and pollution to the environment.
Beyondlaser's cutting series for thin film laser cutting machine uses a laser beam to heat a small area of brittle material, causing a large thermal gradient and severe mechanical deformation in the area, resulting in cracks in the material.
As long as a balanced heating gradient is maintained, the laser beam can guide the cracks to occur in any desired direction.
It is suitable for cutting and forming PET/PI cover film (CVL), flexible board (FPC), rigid-flex board (RF) and thin multilayer boards.
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What are the precautions for operating a laser marking machine?
1. It is strictly prohibited to start the laser power supply and Q-switching power supply when there is no water or the water circulation is abnormal.
2. The Q power supply is not allowed to operate without load (i.e., the output terminal of the Q power supply should be left floating).
3. In case of any abnormal phenomenon, first turn off the galvanometer switch and the key switch, and then conduct a check.
4. It is not allowed to start other components before the krypton lamp is lit to prevent high voltage from entering and damaging the components.
5. Pay attention to leaving the output terminal (anode) of the laser power supply suspended to prevent sparking and breakdown with other electrical appliances.
6. Keep the internal circulating water clean. Regularly clean the water tank and replace it with clean deionized water or pure water.
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What should we do when laser intensity decreases and the marking is not clear enough?
1. Turn off the machine and check if the laser resonant cavity has changed; Fine-tune the resonant cavity lens. Make the output light spot the best;
2. The acousto-optic crystal is offset or the output energy of the acousto-optic power supply is too low;
Adjust the position of the audio-visual crystal or increase the working current of the audio-visual power supply;
3. The laser entering the galvanometer deviates from the center: Adjust the laser;
4. If the current is adjusted to around 20A but the light sensitivity is still insufficient: the krypton lamp is aging. Replace it with a new one.
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How to maintain a UV laser cutting machine?
1. It is required to carry out regular cleaning every day, remove debris from the countertop, limiters and guide rails, and spray lubricating oil on the guide rails
2. The waste materials in the collection box should be cleared regularly to prevent excessive waste from blocking the exhaust port.
3. Clean the chiller once every 15 days, drain all the internal water, and then fill it with fresh pure water.
4. The reflector and focusing lens should be wiped with a special cleaning solution every 6 to 8 hours.
When wiping, use a cotton swab or cotton swab dipped in the cleaning solution to wipe from the center to the edge of the focusing lens in a counterclockwise direction.
At the same time, be careful not to scratch the lens.
5. The indoor environment can affect the lifespan of the machine, especially in damp and dusty conditions.
A damp environment is prone to causing rust on the reflective lenses and also easily leading to short circuits, discharge and sparking of the velvet laser.
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What accidents might be caused by the laser emission when using a laser cutting machine?
(1) A fire was caused by the laser coming into contact with flammable materials.
Everyone knows that the power of laser generators is very high, especially when it comes to high-power laser cutting machines, the temperature of the emitted laser is extremely high. The possibility of a fire being caused when a laser beam comes into contact with flammable objects is very high.
(2) Harmful gases may be produced when the machine is in operation.
For instance, when cutting with oxygen, it undergoes a chemical reaction with the cutting material, generating unknown chemical substances or fine particles and other impurities. After being absorbed by the human body, it may cause allergic reactions or discomfort in the lungs and other respiratory tracts. Protective measures should be taken when conducting work.
(3) Direct laser exposure to the human body can be harmful.
The damage caused by lasers to the human body mainly includes damage to the eyes and skin. Among the harms caused by lasers, the damage to the eyes is the most severe. Moreover, damage to the eyes is permanent. So when doing homework, you must pay attention to protecting your eyes.
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What is the focused spot diameter of nanosecond, picosecond and femtosecond laser?
Nanosecond: The light spot is 0.5-1mm.
Picosecond: The focused spot is around 0.02mm.
Femtosecond: Under the action of a laser beam with a high repetition rate of 100-200KHz and a very short pulse width of 10ps,
the focused spot diameter is as small as 0.003mm.
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What are the main applications of UV laser cutting machine?
The UV laser cutting machine can be used for cutting and depaneling PCB.
It can precisely cut and shape various types of PCB circuit boards with V-CUT and stamp holes, and open Windows and covers.
It can also be used for separating packaged circuit boards and ordinary smooth boards.
It is suitable for cutting various types of PCB substrates, such as ceramic substrates, rigid-flex boards, FR4, PCBs, FPCs, fingerprint recognition modules, cover films, composite materials, copper substrates, aluminum substrates, etc.
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Precautions for laser cutting machines to process various metal materials?
Copper and brass:
Both materials have high reflectivity and excellent thermal conductivity.
Brass with a thickness of less than 1mm can be processed by nitrogen laser cutting.
Copper with a thickness of less than 2mm can be cut. The gas used for laser cutting processing must be oxygen.
Copper and brass can only be cut when a "reflective absorption" device is installed on the system. Otherwise, reflection will damage the optical components.
Synthetic materials:
Processable synthetic materials include: thermoplastics, thermosetting materials and artificial rubber.
Aluminum:
Despite its high reflectivity and thermal conductivity, aluminum materials with a thickness of less than 6mm can be cut, depending on the type of alloy and the capacity of the laser.
When cutting with oxygen, the cutting surface is rough and hard.
When nitrogen is used, the cutting surface is smooth.
Pure aluminum is extremely difficult to cut due to its high purity.
Only when a "reflection and absorption" device is installed on the fiber laser cutting machine system can aluminum materials be cut.
Otherwise, reflection will damage the optical components
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What should be paid attention to when laser cutting stainless steel?
Laser cutting processing of stainless steel requires the use of oxygen, under the condition that edge oxidation is not a concern.
If nitrogen is used to achieve an edge free of oxidation and burrs, no further processing is required.
Coating an oil film on the surface of the sheet will achieve a better perforation effect without reducing the processing quality.