Fecha de publicación: 07/04/2023 Fuente: WIPO "circular economy" The invention relates to the field of manufacturing of dry-mixed mortar, in particular to an automatic proportioning device for dry-mixed mortar raw materials, a lead screw array is rotatably mounted on two sides of the upper surface of a bottom plate, sliding rods are vertically and fixedly mounted at the top ends of lead screws, and two supporting plates are slidably mounted on the sliding rods on two sides at intervals and can be in threaded transmission connection with the lead screws; a material collecting hopper is fixedly installed between the two supporting plates, a first spring is arranged on a lead screw and a sliding rod in a sleeving mode, a material distributing mechanism is arranged on the side face of the shell in an array mode, and the material distributing mechanism is matched with the material collecting hopper in a lifting mode. Therefore, quantitative proportioning feeding of various combined raw materials is realized, the time and energy for manually weighing and proportioning the raw materials are greatly saved, feeding of various raw materials is facilitated, raw material proportioning and stirring are synchronous, more time is saved, and meanwhile, the raw material proportioning effect is convenient to observe.