Impeller mold demolding device

Abstract

The invention relates to the field of injection molds, in particular to an impeller mold demolding device. The device comprises a movable mold frame plate, a positioning plate, a guide plate, a core disc and at least three side inserts, a positioning hole is formed in the top of the positioning plate, the core disc and the side inserts are all located in the positioning hole, the core disc comprises a disc body and a plurality of molding ribs arranged on the side face of the disc body at intervals, the side, facing the core disc, of each side insert is provided with a groove, each groove comprises a side molded surface and a side abutting surface abutting against the end face of the molding ribs, and each side molded surface is provided with a plurality of molding protrusions abutting against the side faces of the molding ribs. An ejector rod is mounted at the bottom of each side insert and comprises a rod head section, a guide section and a rod bottom section, a guide hole matched with each rod head section is formed in the guide plate, a vertical guide surface and an inclined guide surface are arranged on the side, facing the core disc, of each guide section, and a receding inclined surface, a receding vertical surface and a transition cambered surface are arranged on the side, back to the core disc, of each guide section. According to the demolding device, accurate forming of a sawtooth-shaped noise reduction structure on the edge of a blade can be guaranteed, demolding can be conducted smoothly only through straight ejection operation, and the implementation cost is low.

Description

technical field [0001] The invention relates to the field of injection molds, in particular to an impeller mold demoulding device. Background technique [0002] The cross-flow fan is an important part of air-conditioning products, and it is also an important source of operating noise for air-conditioning indoor units. At present, many ways have been researched in the industry to reduce the noise of the cross-flow fan. Among them, the relatively simple and feasible method is to improve the impeller structure, specifically by introducing serrated notches on the blade edge of the impeller as a noise reduction structure, so as to suppress the impact of the shedding vortex. The disturbance of the wake flow, thereby reducing the aerodynamic noise caused by unsteady pressure fluctuations on the blade surface and wake vortices. To introduce this kind of noise reduction structure on the impeller, the corresponding molded parts in the mold need to be provided with undercuts for each ...

AI Technical Summary

Problems solved by technology

To introduce this kind of noise reduction structure on the impeller, the corresponding molded parts in the mold need to be provided with undercuts for each blade. Introducing multiple sets of oil cylinders, the design of the mold is difficult and the implementation cost is also extremely high

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