EPC foam mold dryer, medium and low temperature EPC white mold drying device technology Dynamic EPC is playing with "two waters": one is molten iron of different materials, the other is water for foam mold; Many casting defects in EPC are caused by the latter (foam, coating not completely dry - "water")
Today, let's talk about the moisture drying of each link in detail:
1. The moisture content of the beads just pre sent is about 5% (this moisture is controlled through the bead drying and ripening link. The high-quality bead ripening is determined by good environment!
The ambient humidity around the bead ripening should be low and the ventilation conditions should be good. The bead drying and ripening function of the pre sending machine fluidized bed should also be reasonably used)
2. The water content of the newly formed white foam mold (with traditional water cooling) is 5-10%
3. The water content of the paint mixed by foam white mold dip coating is about 45%
EPC is a high energy consumption industry, while traditional equipment drying has large energy consumption, potential safety hazards and high economic costs. A large number of heat sources are wasted
According to the practical problems of high humidity, slow drying speed and high energy consumption in the EPC drying room, which affect the drying effect, a new type of environmental friendly energy-saving mid low temperature EPC white mold drying device - PD-45G EPC foam mold dryer and PD series heating, drying and dehumidification integrated machine have been developed
This machine will separate the moisture and hot gas in the drying room through the separator, and the heat will return to the drying room. After countless cycles, the moisture in the drying room will be separated, and the waste heat will return to the drying room. The heat will not be lost in the whole process, and the outlet temperature will reach about 50 ° C, so as to achieve the purpose of energy-saving drying and dehumidification
Suggestions for drying foam white mold and coating in EPC plant:
a Drying process of foam white mold: the newly formed foam white mold should not be forced to dry in the drying room immediately,
Cause: The pores of the newly formed foam white mold beads are open. If you go into the drying room immediately to force drying, the pores of the beads will quickly close, the surface beads will continue to expand slightly at a certain temperature, locking the surface of the foam white mold (we often say the surface of the foam white mold is closed), and the residual water in the foam white mold will be difficult to escape during the molding process
Correct method and suggestion: The molded foam white mold should first let the moisture in the foam white mold escape 60-70% in the room temperature environment or the low-temperature drying room with hot air flow, then enter the drying room, and use the low humidity of the drying room to force drying (foam white mold drying: the drying room temperature is controlled at 35-40 ° C, and the humidity is controlled below 30% RH)
Note: After the foam white mold is dried, the inside of the foam white mold will not absorb water, and the surface will form a water film (dry as soon as it enters the drying room) as soon as it is cold and hot.
b Coating drying process: the coating layer is different. If the dried model cluster is placed in a place with high room temperature and humidity, the coating will absorb moisture quickly. (Therefore, we must pay attention to the process of taking the model cluster out of the drying room for packing.)
All the above contents about EPC foam mold dryer and medium low temperature EPC white mold dryer are provided by Mashima Electric, for your reference only
