What are the Types of Paints?
There are many types of paints, including varnish, polyurethane paint, water-based paint, nitro paint, epoxy zinc-rich primer, phosphating primer, and alkyd anti-rust paint, among others.
Why Paint Stripping?
After long-term use, furniture, fences, and other wooden products may crack, fade, and develop other problems. Ultraviolet rays and rain also erode metal structures, leading to problems such as rust and cracking on the paint surface, which shortens their service life. It is necessary to remove the old paint from the surface and reapply a fresh coat.
HANTENCNC recommends using a laser paint removal machine to remove the paint, which can prevent corrosion and rust, thereby extending the service life. After repainting, it can prolong its service life and enhance its appearance. Laser cleaning is an environmentally friendly, pollution-free new cleaning method that is efficient and does not cause any damage to the substrate.
Laser Paint Removal Solution
The laser emits a high-energy beam, which is directed through a cleaning head where a motor drives a mirror to oscillate rapidly.
As the laser beam passes through the focusing lens, it is projected onto the surface of the material to be cleaned. The contaminants are then vaporized and removed from the substrate surface.
HANTENCNC’s laser paint removal solution is suit for diverse industries, from automotive and aerospace to shipbuilding, furniture, and general manufacturing. It can effectively removes paint from both metal and wood surfaces while preserving the integrity of the base material.
HANTENCNC’s laser cleaning machines quickly and efficiently remove paint from both metal and non-metal surfaces without damaging the substrate.
Compared to traditional methods such as sandblasting, chemical solvents, or mechanical grinding, laser paint removal is more environmentally friendly, more precise, and safer.
Laser Cleaning machines can accurately control the cleaning area and are easily operated.
The cleaning precision is high. The intensity of the laser energy can be adjusted. The parameters can be set according to the thickness of the paint or rust to prevent damage to the material’s surface.
It is environmentally friendly and pollution-free, but dust will be generated during cleaning. It is recommended to use it with a smoke purifier.
No consumables are consumed, the cost of use is low, and maintenance is also simple.
Laser Paint Removal vs.Traditional Cleaning
There are several methods for removing paint from wood. The main difference between mechanical grinding and laser paint removal is the different modes of action.
Traditional mechanical grinding is often operated with sandpaper or grinding wheels. It relies on friction to remove paint, but it can easily scratch the wood’s surface. This will destroy the original wood grain and affect the appearance.
Laser paint removal uses laser energy to vaporize the paint instantly. It peels off the surface in a non-contact manner. The cleaning process is controllable. The laser energy can be adjusted without damaging the texture and structure of the wood.
| Cleaning Method | Laser Paint Removal | Chemical Paint Stripping | Mechanical Grinding | High-Temperature Softening |
|---|---|---|---|---|
| Principle | Laser vaporizes and decomposes the paint layer | Chemical reagents dissolve paint | Uses sandpaper or grinding wheels | Softens paint with hot air, then scrapes off |
| Efficiency (Paint Thickness ≤ μm) | 300W 5MJ 5–10 m²/h |
Very slow | High efficiency | Average (requires extra steps) |
| Cost | High initial equipment cost, low long-term consumable cost | High cost for chemicals and wastewater treatment | Low tool cost, high labor cost | Low cost |
| Environmental protection | Best – generates some dust, can use fume extractor | Worst – releases toxic substances | Moderate – produces a lot of dust | Moderate – high heat may release toxic gases |
| Effect | Excellent – can focus to micron level | Poor – chemicals may penetrate the wood | Moderate – can damage wood texture | Moderate – may cause wood to char |
Laser Paint Removal Effects – Before vs. After
Recommended Laser Paint Removal
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How to Choose a Laser Cleaning Machine
for Paint Removal?
1. Types of Laser Cleaning Machine
Laser cleaning machines are mainly divided into two types: pulse and continuous laser cleaning machines.
Continuous Laser Cleaning Machine (1500W-3000W):
Continuous laser cleaning machine has high cleaning efficiency and can operate continuously. It can quickly remove paint from metal surfaces and is suitable for large-scale batch cleaning.
If the requirements for substrate damage are not high and the budget is limited, continuous laser cleaning machines can be preferred.
- Advantages: Relatively cheap price, wide cleaning range, high efficiency.
- Disadvantages: Fire will occur during cleaning. The laser will damage the substrate.
Pulse Laser Cleaning Machine (200W-1000W):
The pulse laser cleaning machine is suitable for removing paint from the surface of wood products, as well as from automobile sheet metal. Because the pulse laser has little thermal effect on the substrate, it will not burn, nor does it cause any damage to the wooden surface.
HANTENCNC recommends using a 300W or 500W pulse laser cleaning machine. The primary difference between these two powers lies in their efficiency during laser cleaning. The 500W laser cleaning machine is expected to increase the efficiency of the 300W laser cleaning machine by approximately 60%.
You can also select different focusing lenses depending on which type of paint you want to remove.
For example, if the paint is water-based and easier to clean, we recommend using the focus lens F330. F330 has a wider cleaning range and higher efficiency.
However, laser cleaning is not suitable for removing all kinds of paint, such as polyurethane paint, due to its characteristics. It will be heated and bubble during the cleaning process, resulting in an unsatisfactory removal effect.
When selecting a suitable laser cleaning machine, please consult with our sales manager first, who will recommend a machine that suits your requirements or budget.
2. Machine appearance
We offer backpack and push-pull type (such as the SEAGULL2). You can select different models based on your usage scenario.
- If there is no power supply outdoors or it is inconvenient to carry large equipment for high-altitude operations, it is recommended to use a backpack laser cleaning machine. This model features a built-in battery, is compact in size, and is easy to carry.
- If you are indoors or in a convenient power supply, you can choose the Seagull push-pull type. It is equipped with universal wheels that support cleaning while in motion. The cleaning head features a distance measurement function, allowing the focus distance to be determined by the screen value.
Common Issues When Using a Laser Cleaning Machine
(1) When using a pulse cleaning machine to clean the paint on wood products, if the surface is burned black, confirm whether the laser is in the focal position.
You can find the focal point by adjusting the distance between the cleaning head and the material. When the laser energy is the strongest, it is the focal position. When the laser deviates from the focal point, it is easy to cause a fire, resulting in the wood products burning black.
(2) Improper setting of laser power or pulse frequency can also cause problems. If the energy is too low, the cleaning will not be thorough. If it is too high, the material may be damaged.
(3) After long-term use, the protective lens may accumulate dust or be scratched. You can gently wipe it with an alcohol-cotton swab. If there are scratches, you will need to replace the lens.
(4) Before using the continuous laser cleaning machine, please confirm whether the compressed air is connected. If not, the protective lens or focusing lens will be damaged when the laser emits light.
FAQs
Can a pulse laser cleaner remove paint from all wood surfaces?
No. For example, polyurethane paint has a high melting point after curing, typically above 150 °C. Ordinary laser energy cannot instantly vaporize or decompose the layer.
Which wood cannot be cleaned by a pulse laser cleaner?
Wood with a loose texture or that is relatively fragile is not suitable for cleaning. For example, rotten wood or low-density boards pressed from sawdust. The laser pulse generates heat during the cleaning process, which may cause the surface to discolor or be damaged.
How to determine whether the wood is suitable for cleaning with a pulse laser cleaner?
(1) High-density hardwoods, such as rosewood, oak, walnut, etc. They have a tight structure and good heat resistance, making them suitable for laser cleaning.
(2) If there is metal inlay or metal coating on the wood surface, it cannot be cleaned with a laser. The laser will initially act on the metal. This causes the metal to overheat, resulting in the wood surface being burned and discolored.
When cleaning paint on 1-2mm thin metal parts, should I use a continuous or pulsed laser cleaner?
Pulse laser cleaner. Because continuous laser cleaners generate more heat to the substrate. Thin plates are easily deformed after being heated.
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