An integrated sand mixer and sand mixing method

Abstract

An integrated sand mixer, which is realized by a blade-stirred sand mixer. The sand mixer has a sand dosing device and a mixing drum, and a premixing blade (7) is set in the sand dosing device, and a drive for driving the premixing blade (7) is provided. The pre-mixing power mechanism (8) makes the sand metering device constitute the pre-mixing cylinder (3); the powder material inlet and the liquid material inlet are respectively set on the mixing drum, and the outlet of the pre-mixing cylinder (3) is connected to the The powder feed port of the mixing drum makes the mixing drum constitute the final mixing drum (2); in the pre-mixing drum (3), quantitative addition of raw sand, quantitative addition of powdery auxiliary materials and premixing of raw sand and powdery auxiliary materials are carried out; The raw sand and liquid resin material pre-mixed with powdery auxiliary materials are quantitatively entered into the final mixing cylinder (2), and the stirring blade (6) is driven to rotate, and the required molding sand is obtained after mixing evenly; among them, the final mixing cylinder (2) carries out During the mixing operation, the next cycle of quantitative addition of raw sand, quantitative addition of powdery auxiliary materials and premixing of raw sand and powdery auxiliary materials are carried out simultaneously in the premixing cylinder (3). An integrated sand mixing method is also disclosed. The sand mixing machine and sand mixing method realize two-stage sand mixing without increasing the container. The two units can work at the same time, and the sand mixing time is greatly shortened. The mixing time, sand mixing temperature rise and uniformity can be adjusted arbitrarily. relationship between.

Description

technical field [0001] The invention relates to a machine used in the metal casting industry, in particular to an integrated sand mixer and a sand mixing method, in particular to an integrated sand mixer and a sand mixing method suitable for use in an inorganic process and a cold core process. Background technique [0002] In the metal foundry industry, the preparation of sand cores is an important part of the foundry process. During this process, it is necessary to uniformly mix sand with binder, curing agent or other additives to prepare molding sand (or called core sand). In the prior art, mixing is usually used to achieve sand mixing. [0003] A conventional sand mixer is usually composed of a sand quantitative unit, a powdery auxiliary material quantitative unit, a liquid material quantitative unit and a sand mixing unit. The sand quantitative unit realizes the raw sand quantitative by volume quantitative method or electronic quantitative method. Electronic quantificat...

AI Technical Summary

Problems solved by technology

[0008] However, in order to cooperate with an efficient core making machine, the above-mentioned action time is required to be controlled within 60s. Obviously, the process beat of the prior art cannot meet this requirement

[0009] (2) The mixing blades of the sand mixer are arranged horizontally. In order to achieve an excellent mixing effect, a long mixing time (for example, 60s) is required. On the one hand, this leads to a higher temperature rise and cannot be applied to inorganic processes or cold core process, on the other hand, it also makes it difficult to shorten the tact time of the entire process

[0010] (3) Due to the horizontal blade structure, there is a large gap between the bottom of the blade and the mixing tank, and the sand in this part cannot be mixed effectively, thereby reducing the mixing quality of the core sand mixture and making cleaning more difficult

[0011] (4) The sand mixing cylinder of the sand mixer cannot be disassembled conveniently and quickly, and the inner lining and cleaning of the cylinder wall must be replaced or cleaned online for daily maintenance, which requires shutdown and affects normal production

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