Counter-pressure casting machine, filtering system of counter-pressure casting machine, net placing method of filtering system and pressure control method of filtering system

The invention relates to a counter-pressure casting machine, a filtering system of the counter-pressure casting machine, a net placing method of the filtering system and a pressure control method. According to the filter system for the counter-pressure casting machine, the filter screen is arranged between the top of the riser tube and the sprue bush, is positioned below the sprue bush and is not in contact with the sprue bush. Therefore, the screen placing operation can be executed according to'heat 'instead of'mold', so that the screen placing frequency and the error probability can be greatly reduced, the process cost is reduced, the hidden danger of product quality is eliminated, raw materials can be saved, and the manufacturing cost can be reduced. Overall, the operation time is saved in the casting production process, so that the casting rhythm can be reduced, the effective output of products is increased, and the comprehensive utilization rate of equipment is improved. 本申请涉及差压铸造机、其过滤系统及其放网方法和压力控制方法。按照本