Plastic draught fan or plastic air blower is injected with ABS plastic material through plastic injection molds. Draught fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling, boilers and industrial furnaces for ventilation and ventilation; Cooling and ventilation in air conditioning equipment and household electrical equipment; Drying and selection of grain, aeration and propulsion of wind tunnel wind source and hovercraft, etc.