Five systems that constitute the uv light curing device

The uv light curing device is a mechanical device that can emit strong ultraviolet rays that can be used. It has been widely used in printing, electronics, building materials, machinery and other industries. Taking Tianjin Ruisente UV equipment as an example, its type and style are different because of its different products, but its ultimate purpose is the same. It is used to cure UV inks or UV Varnish and other UV coatings. The UV light curing device consists of five systems: a light source system, a ventilation system, a control system, a transmission system, and a cabinet system.

A light source system

It consists of an uv lamp, a uv lamp shade/reflector, an uv transformer (ballast), and a uv capacitor (trigger).

1. Uv ultraviolet lamp

At present, UV lamps on the market are divided into two types: high pressure mercury lamps and metal halide lamps. High-pressure mercury lamps are commonly used in domestic equipment, and some of the imported equipment use metal halide lamps. Metal halide lamps are also used for new coatings or hard-to-cure lamps.

1) UV lamp power selection. The power of a UV lamp, that is, the radiant energy of a UV lamp, is also called penetrating power. First, it must meet the spectral wavelength and power density requirements of UV ink (gloss) absorption. If the power of the UV lamp is not enough, the product will not reach full cure even if the illumination time is longer and there are many more UVR curing devices. On the contrary, the surface of the UV ink (gloss) will be aged, closed, brittle, and the like. At the same time, the adhesion of the ink (bright oil) is also not good, and the superimposed interlayer adhesion force will be poor. Because the low-power UV light cannot penetrate the bottom of the ink layer, the bottom is not cured or cured sufficiently.

2) The power of the Raytheon UV lamp is generally to meet the requirements of 80~120W/cm, but the greater the power, the greater the heat. Therefore, the power should be selected according to the difference between the cured material and the curing speed.

3) The maximum lifetime of the Raytheon UV lamp is generally 1500-2600 hours, and it should be replaced after it is reached, because the intensity of the ultraviolet light emitted by the UV lamp at this time period will weaken, which will affect the curing effect. At the same time, according to the production environment (dust content of air) during the service period, it is recommended to clean the reflection plate on the surface of the lamp tube and reflector surface with absolute ethanol at an appropriate time, and then turn the UV lamp tube 90-180 degrees. This is conducive to UV rays all effective radiation to UV ink or varnish, to ensure a certain penetration.

2.uv lamp shade/reflector

The types of reflectors are focused, non-focused, and multi-faceted reflective. The focus is generally used. The structure of this reflector is characterized by the concentrated energy of the reflected UV light, the high efficiency of photo-curing, which is conducive to the solidification of the ink of the thick ink layer, and the complete curing of the deep ink layer. In this regard, attention should be paid to the selection and shape of the reflector:

1) Aluminum must be used for material selection, but iron or stainless steel cannot be used for cost saving because the stainless steel plate will turn black at high temperatures. After blackening, it will not only reflect light but also absorb light. Reflective effect is the best mirror aluminum oxide plate, the reflectance of up to 80% or more, thereby greatly improving the utilization of UV.

2) The shape of the shape reflector is to ensure that the UV light can be gathered together, so the shape of the semicircle is best. Also note the placement of the UV lamp to ensure it is in focus. In addition, the reflector is an important channel for heat dissipation of the UV lamp. Therefore, the outer side of the aluminum cover must be processed into a heat sink to increase the heat dissipation area. Reflectors play a very important role in UV curing devices. Some manufacturers often ignore its role, and use some alternatives to act as a reflector, and even do not install a reflector, so that UV light 40% -50% of the UV energy is wasted. The countermeasures of some manufacturers are to increase the power of UV lamps blindly. This not only fails to fundamentally solve the problem, but also causes a greater waste of electrical energy.

3. Uv transformer/ballast

Ruisente uv magnetic flux leakage transformer is a good supporting power source for uv lamp. It is made of imported silicon steel sheet, scientific design, and advanced technology. It is characterized by stable performance, high efficiency and low consumption, and requires series capacitors. Applicable to relatively dry and clean indoor places -40-50 °C, relative humidity less than 85% without strong corrosion gas, limited by atmospheric overpressure, power is from 1kw-25kw.

The choice of magnetic leakage transformer must match the power of the uv lamp, that is, the transformer must have enough output voltage to ensure that the uv lamp can work at full power. If the output voltage is too high, the lamp tube will be burnt; and if the output voltage is too low, the lamp tube will not be able to work at full power, so that the intensity of the ultraviolet output will be insufficient.

Ballast power from 300W to 4KW, in series in the line, and with a trigger (used to speed up the start of the lamp), generates a momentary high voltage, so that the lamp discharge start. In the working line to play a role in limiting the lamp current.

4. Uv capacitor, trigger

The choice of the capacitor should be matched with the lamp and the transformer, and select the capacity of the capacitor used according to the output voltage of the transformer. If it is not properly selected, the capacitor will breakdown, affecting the normal operation of the UV curing device. Compatible with the magnetic flux leakage transformer, it plays the role of compensating power and balancing current, so that the USR uv lamp works in a stable state. Specifications: 8UF-20.5UF.

The trigger and the ballast can be used to accelerate the starting process of the uv lamp, raising the working voltage in a flash, so that the uv lamp can be quickly started in a short period of time.

Second, the ventilation system

It consists of a fan, a draft tube, and a wind shield. What should be noted here is the choice of fan, the control of air volume and the way of exhausting air.

1. The selection of the fan shall be determined according to the power of the uv ultraviolet lamp and the actual situation of the cabinet space. Generally, two wind fans and two wind turbines are to be distributed, but there are only one draught fan. Inadequate fan power and insufficient exhaust air volume can lead to overheating of the chassis, shortening the lamp life, and even melting. It also makes it difficult to ensure the quality of the cured product. If the fan power is too large, the air volume is too high and the temperature inside the chassis is too low. UV lamps cannot work at full power, and cured products are not easy to dry.

2. The control of the air volume means that the air volume of the uv light curing device should be adjustable. This is because it is necessary to take into account the large temperature difference between winter and summer. Many factories do not have a constant-temperature workshop. Therefore, if the Revit uv curing device works with the same amount of air in winter and summer, it will definitely affect the quality of the product. Normally, two fans are controlled by a temperature control method. When a certain temperature is reached, a fan is automatically started. Then a certain temperature is reached and another fan is started. A live valve is arranged on the exhaust and the air inlet to control the fan. Wind and exhaust air volume.

3. The method of exhausting wind refers to taking the form of an upper wind or a lower wind. But in any way, do not blow the wind directly to the UV lamp, because the consequence of this is that the UV lamp can not work at full power (light from white to non-glare blue) due to heat loss. Make the ink dry at all.

Third, the control system

It is a system used to control the operation of the entire Resent UV light curing machine. What is worth noting here is:

1. The fan's control is best controlled automatically by the temperature (covered in the previous section), because control by the person may be omissions, and not accurate enough.

2. Turn on the UV lamp when it is turned on, and then turn on the fan after 2-3 minutes (if the fan is not temperature controlled).

3. After shutdown, the fan should continue to operate until the lamp and the cabinet cool down.

4. The secondary start-up waits until the uv-violet lamps cool down completely before starting.

Fourth, the transmission system

It consists of a speed-regulating motor (or variable frequency speed control), a conveyor belt, and a chain (or conveyor roller). What should be noticed here is the speed adjustment problem. Curing speed should be considered from two aspects, one is full curing, and the other is curing at the best speed.

The optimum speed is selected by passing the product at a certain speed through the Raytheon UV curing device. If it is cured, speed up until the ink layer of the product that comes out of the UV curing device cannot be cured. The speed multiplied by 0.8 is the best speed. In addition, you should also pay attention to the lamp usage time, because with the use of energy attenuation of the Uv lamp, the speed should also be slowed down.

Fifth, the box system

The size of the cabinet is determined based on the product used in the Raytheon uv light curing device. In this regard, it should be noted that: To make the surface of the box flat, the internal light can be irradiated to the place should be set up as much as possible to avoid the outside temperature of the box to burn people. There should be no light leakage outside.

In short, in order to enable the uv light curing device to operate safely and normally, the light curing achieves the best results. The above components should be taken care of and should not be ignored.

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Sheet paper packing system: The sheet paper will be placed onto pallet by conveyor, then go through centering machine, PE film bandling machine, Top Sheet Dispenser, top sheet sealing, transport to shrinking machine, cooling system after shrink, strapping machine, elevator, then to the automatic storage area.

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Shandong Sinolion Machinery Corp., Ltd. , https://www.sinolion.cc