Fan volute with adjustable molded line and fan for testing

The invention relates to a molded line adjustable fan volute and a fan for testing, which can improve the performance of the fan and remarkably reduce the iteration time of design and the manufacturing cost. The fan volute with the adjustable molded line comprises a volute frame, the volute frame comprises a pair of end covers arranged at intervals, each end cover is provided with an air inlet and a plurality of adjusting grooves arranged around the air inlet, and the adjusting grooves are curved grooves extending in the radial direction of the air inlet in a bent mode; the volute annular wall comprises an elastic side wall movably arranged between the two end covers and a volute tongue fixedly arranged between the two end covers; each adjusting assembly comprises an adjusting rod and fixed cover plates, wherein the adjusting rod is inserted into the opposite adjusting grooves in the two end covers in a sliding mode and abuts against the elastic side walls, and the fixed cover plates are connected with the tw