Different from domestic gravure printing machines, the drying heat source of imported gravure printing machines is usually not specified by the manufacturer, but selected and determined by the user. Steam is the most commonly used heat source for drying gravure presses in the past, but other heat sources have also become more and more popular in recent years. These heat sources have their own advantages and disadvantages, and often make users feel embarrassed when choosing.
In general, the maximum drying temperature, temperature characteristics, complexity of the drying system, investment and use cost of the drying system are the main considerations, but the most critical is the process requirements used are printing and coating , Compounding and other inking or gluing volume, and production speed requirements.
In our country, the choice of dry heat source is also largely dependent on the heat source related information.
high temperature
High temperature (up to 600-800 ° F) Gas: high temperature (up to 350, generally 250-320 ° F) Drying temperature characteristics are relatively stable, no instantaneous temperature "peak" phenomenon; heating speed is slow and stable, similar to steam, heating Fast speed, good stability, fast heating speed, fast heating speed, easy to be disturbed, unstable drying device has a large structure, takes up a large space, and the appearance is not neat and beautiful. New controller: stable startup, anti-leakage, low temperature, exchanger life The long structure is more complicated, requiring more complicated anti-leakage control and high sensitivity requirements. The investment in equipment that may burn out materials for temperature-sensitive materials (such as thin films) may be low, but the maintenance cost may be relatively large (higher than steam heating 5- 10%) The investment cost is higher and lower. In direct combustion, the cost is only 1/3 to 1/5 of the electric heating. The use cost is lower (lower than the electric heating). In most areas, the higher cost is lower (the electric heating is lower ) The use cost is generally low. The use area covers a large area, and the use is restricted in certain environments (such as in certain development zones), and serious maintenance is required in any area. It can be used in any area with a small footprint and no leakage, but it needs to have a suitable space for the placement of hot oil containers. It requires a clean gas (the favorite in North America). In many areas, the main problem is unconditional use. Risk of leakage, large installation space for auxiliary facilities, possible environmental pollution during non-central heating. Hot oil containers require a certain safety distance and are greatly affected by the air supply situationSteel Office Table with Drawers for Sale,Office Table Metal,Steel Office Table Price
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