Welding masks are used to help welders protect against occupational hazards from welding, accurately positioning and efficiently welding during the welding process. The domestic welding mask market mainly includes several types: domestic automatic dimming, imported automatic dimming, head mounted black glass, and handheld black glass.
Automatic dimming welding mask frees hands, improves comfort, and improves work efficiency. Spending more money on welding masks will improve the comfort and welding skills of welders, resulting in better welding quality and better occupational health for welders.
Principle of Automatic Dimming Welding Cap
"Automatic dimming welding caps" include all welding caps that can automatically respond to flashes during the welding process. This type of helmet uses LCD display and can automatically dimming. When pausing welding, welding workers can view the welded object through a variable light filter. Once a welding arc is generated, the helmet's line of sight will darken to prevent damage from strong radiation. The windows of passive products are made of permanent colored glass. After welding is completed, the welding worker needs to lift or remove the welding cap to see the welded object and its surrounding environment.
Automatic dimming filter
The automatic dimming filter is an integral part of the welding cap and can automatically dimming when a welding arc occurs. Its components include: liquid crystal display (LCD), electronic components, solar cells/batteries, sensors, and ultraviolet/infrared filters.
1 LCD - Liquid Crystal Display
LCD display is part of an automatic dimming filter. The included liquid crystal is used for automatic dimming of the filter. The arrangement of liquid crystals is controlled by electrical pulses. Liquid crystals respond to corresponding light intensity in different ways through different arrangements.
2 UV/IR - UV/IR filter
This filter is used to reflect ultraviolet and infrared light radiation. Fixed installed in the automatic dimming filter, providing you with protection and not affected by the brightness environment of the dimming filter.
3 inner protective pieces
The inner protective film is used to prevent dust or other dirt from entering the back side of the automatic dimming filter. This ultra-thin plastic protective mirror is a vulnerable part, and it can be replaced if stains or fading occur.
4 Sensors
The sensor is installed inside an automatic variable light filter to detect welding arcs. When a welding arc is generated, the sensor sends a signal to the electronic device, which in turn activates the LCD display.
5 front protective film
The front protective plate is installed in front of the welding cap variable light filter to prevent welding spatter from damaging the variable light filter. Regularly replace the front protective mirror according to the welding process and the degree of stains.
It should be emphasized that many low-end welding masks on the current market also have high light output with nominal automatic dimming filters
Academic level, such as 1/1/1/1 (four values represent optical level, scattering luminosity, homogeneity, and visual angle dependence, with 1 being the highest level and 3 being the lowest level). The numerical perfection masks many technical shortcomings. There are many blind spots on the lenses of substandard lenses, and light cannot be seen by the naked eye. Long term exposure to blind spots can also cause eye damage. Due to differences in testing standards, the top foreign manufacturers of automatic dimming welding masks have a high elimination rate of 5% -10% for mirror groups, minimizing the harm to the eyes of welding workers.
The automatic dimming welding face mask sold in the market is generally made of polyamide material as the outer shell, which is anti drop and flame retardant. However, the weight is generally heavy, and the wearer's comfort level varies. There is also an automatic dimming mask made of flame-retardant textile material, bringing a revolution in welding masks.
Fabric hat body, comfortable and fire-resistant, lightweight and convenient to wear, removable and washable.
Compared to traditional welding caps, it can reduce the weight of the welder by about 200 kilograms per year. This type of welding mask is suitable for robot welding worker protection, thin plate aluminum alloy, and stainless steel welding; Automobile maintenance, etc; Suitable for assembly line operations, sitting welding, and other types. For customers with special requirements, the neck protection part can be extended, as shown in the following figure,
Upgrade and use of automatic dimming welding cap: connect to safety helmet or electric air breathing device
The safety helmet adapter makes it easy to connect welding caps and safety helmets, adapting to situations that require safety helmets. The welding cap is used in conjunction with the power air purification respiratory system, which not only protects the respiratory tract and lungs, but also the facial airflow control valve can keep the forehead cool and the eyes dry.
Welding operations involve various risks, some visible and some even imperceptible. According to the US Bureau of Labor statistics, there are as many as 365000 welding accidents occurring in the United States each year. To prevent these risks, the higher the optical level, the better the quality of the mirror group, and the more complete the functions of the automatic dimming welding mask, the more complete the protection obtained. Users can choose an automatic dimming welding cap that suits their own situation.
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