CTP requirements for temperature and humidity, dust content and site

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There are two requirements for the temperature. First, the indoor temperature must be within the range required by the CTP equipment, generally 20 to 24 ° C; second, the temperature can not be cold and hot, especially in winter, otherwise the power supply temperature is in a short time. The inside rises, it is easy to condense water mist and burn the circuit board.

There are two requirements for humidity. First, the indoor humidity must be controlled at 40% to 60%. If the indoor rainy season in the south, the indoor needs to be dehumidified; if the ambient humidity is too small, the static electricity generated by friction is not easy to be The air is carried away, which is easy to damage electronic components. Second, the humidity of the gas used in CTP should be controlled below 30%. The CTP is loaded with a cold dryer to ensure that the gas used in CTP is cold and dry. If the humidity of the air used in CTP is too large, the optical device will easily condense water mist, resulting in equipment. damage.

In addition, the ground requires a certain carrying capacity. Due to the heavy CTP, the carrying capacity of the ground is high. The hardness of the ground is large to ensure that the CTP's feet do not sink for a long time, keeping the CTP level. If the floor uses wooden floors or skeleton floors, it is necessary to test the hardness of the floor to determine its load carrying capacity. Second, the ground should be kept flat. Because CTP only works in a horizontal state, the quality of the plate can be guaranteed. This is especially important for the China-India Zhou CTP with a drum speed of 900 rpm. Therefore, our company will lay the foundation at the beginning of the factory construction, and use the level meter to check whether the CTP is at the level. If it is not level, it will be adjusted in time.

The dust in the air has a great influence on the CTP. Because the dust falls on the circuit board, it will absorb the moisture in the air and form a passage, which will burn the capacitor and the resistor and cause damage to the circuit board. In order to reduce dust, we require operators to take off their shoes in order to enter the CTP workshop, clean and vacuum the CTP every day, and specially make a dust cover for the CTP.

In order to prevent the operator from moving back and forth between the CTP, the developing machine and the plate, it wasted too much time, and we placed the CTP, the developing machine and the plate reasonably. In addition, the device interface lines should also be arranged to prevent many lines from intertwining to cause mutual interference. In addition, because the CTP data lines are relatively fragile and expensive, in order to protect the CTP interface data lines, we have set a warning sign to remind the passage.

The above content is selected from the third issue of “Printing Technology ·Digital Graphic Arts ” in 2013. For more journal content, please pay attention to the journal channel. The latest journal content clicks into the electronic journal channel of Keyin.com.


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