Evaporative mold drying room dehumidifier, fast drying, non cracking, low cost, more environmentally friendly! [Technical trends] As we all know, EPC is also called full mold casting. Nowadays, with the continuous expansion of the application field of EPC, the advantages of EPC technology are more and more obvious. Due to the high precision, small machining allowance, good internal quality and low cost of castings cast by this technology; Therefore, in recent years, more and more small and medium-sized foundries have introduced EPC technology to improve the quality of their castings
Generally, in EPC production, the drying process after coating the EPC mold or mold shell is an indispensable and important link related to product quality and cost. Water based coating is mainly used for EPC in small and medium-sized casting workshops. EPC mold or mold shell must be fully dried before pouring after coating. The drying of EPC mold or shell requires a large amount of heat and a long time. After each coating of EPC mold or shell, it usually needs to be dried for 24-72 hours
The existing drying method is to establish a EPC mold drying room or paint drying room in the foundry, and adopt drying and drying methods, such as fuel combustion, electric heating, pipe heating, etc., to heat the air medium around the EPC mold or mold shell, so that the temperature of the EPC mold drying room or paint drying room is maintained at 45~50 ℃, so that the moisture of the EPC mold or mold shell can volatilize, Finally, the hot and humid air is discharged as waste gas from the EPC mold drying room or coating drying room. But these drying methods have many shortcomings
Among them, the most common heating methods are electric heating and steam heating. However, the former has some shortcomings, such as local overheating, uneven temperature in mold drying room or coating drying room, inconsistent drying rate inside and outside the coating, uneven shrinkage, which is easy to cause coating cracking, etc; The latter will bring in moisture, increase the humidity of the mold drying room or paint drying room, and affect the drying efficiency. Therefore, hot and humid air must be continuously extracted to ensure the drying efficiency, which will consume a large part of heat
Under normal circumstances, the temperature and humidity of the EPC mold drying room or coating drying room should not be too high, otherwise it is easy to cause the EPC mold or shell deformation, coating cracking and other defects. Therefore, according to the characteristics of the lost foam mold or mold shell and coating, a refrigeration dehumidifier is introduced into the mold drying room or coating drying room. The purpose is to improve the drying efficiency of the lost foam mold or mold shell by reducing the humidity of the mold drying room or coating drying room without changing the temperature of the mold drying room or coating drying room, and to reduce unnecessary energy loss to a certain extent
Technical parameters of PD45G EPC mold drying room dehumidifier and Parkoo series heating, heating, drying and dehumidifying integrated machine:, The required model can only be selected correctly after the cooling capacity, dehumidification capacity per unit time and other key data are calculated based on the indoor sealing effect, moisture dissipation source, fresh air supply and other comprehensive factors. Want to know more about the dehumidifier in the EPC mold drying room, which is fast drying, non cracking, low cost and more environmentally friendly! The details are as follows: Hangzhou Parkoo Electrical Equipment Co., Ltd.
To sum up, in a precision casting company, its mold drying room or coating drying room has an area of 6m × 7m, each mold drying room or paint drying room is equipped with 10 drying racks, each drying rack has 3 layers, and each layer can be equipped with 10 EPC molds or shells, that is, each mold drying room or paint drying room is fully filled with EPC molds or shells that need to be dried, and at most 300 EPC molds or shells can be placed. When water-based coating is used, the weight increase of EPC mold or mold shell shall not exceed 2kg after each coating. The proportion of water and refractory aggregate in the coating proportion is about 11, that is, the moisture required to be dried for each EPC mold or mold shell is 1kg. Set the drying time as 10h, that is, each time the mold drying room or paint drying room is required to promote a batch (300) of EPC molds or shells brushed with paint, they are required to be completely dried within 8h
