A kind of preparation method of injection type 3D printer molding sand
A 3D printer, jet technology, applied in casting molding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of porosity and cracks, grooves on the surface of steel casting molds, affecting the surface smoothness of steel castings, etc. quality, crack reduction effect
Active Publication Date: 2019-11-08
ANHUI HELI CO LTD
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Problems solved by technology
[0004] The invention mainly solves the problem of molding sand in the 3D printing mold, which causes the surface of the printed steel casting mold to have the characteristics of grooves, pores and cracks, which seriously affects the surface smoothness of the later steel castings
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[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] (1) Use quartz sand with a particle size of 0.20mm, soak it in 0.1mol / L hydrochloric acid solution at a ratio of 1:7 for 24 hours, then soak and wash it with deionized water for 2-4 times, and dry it in an oven at 100-120°C.
[0025] (2) Add 2.5mol / L FeCl to the quartz sand at a ratio of 5:2 to the material to liquid 3 Solution, after stirring and mixing, first evaporate the water to dryness in a blast dryer, then put it in an...
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Abstract
The invention discloses a preparation method of moulding sand of a jet type 3D printer. Quartz sand is used as roughing sand and is subjected to hydrochloric acid pretreatment, then a ferric oxide film is introduced to the surfaces of particles of the quartz sand, and modified quartz sand is obtained; and pulverized fuel ash is ground and sieved through a sieve being 120-180 meshes, then the pulverized fuel ash is dissolved in water, the modified quartz sand is added, a mixture is put in an ultrasonic cleaner to act, and after the process is finished, drying is carried out. The ferric oxide film is introduced to the surface of the quartz sand, the surface of the quartz sand is in a porous groove shape, grooves are used for being filled with the pulverized fuel ash, the pulverized fuel ashachieves a coating function on the surface of the quartz sand, sintering layers can be formed on the surface of a steel casting and the surface of a mold, and the steel casting can be more convenientto take down in the mold; and meanwhile, cracks on the surface of the steel casting can be reduced, and the quality of the steel casting can be improved.
Description
technical field [0001] The invention relates to the technical field of 3D printers, in particular to a preparation method of jet-type 3D printer molding sand. Background technique [0002] Clay sand green casting is dominant for iron castings, and can produce near-net shape castings under high productivity conditions. The quality of the molding sand directly affects the quality of the castings. The complex sand treatment system affects the performance of the molding sand. The performance of the molding sand for different castings is in the fluctuating state. The cost of molding and core making accounts for half of the casting cost, 60% of casting waste is caused by molding and core making factors, 70% of casting welding repair defects are related to molding and core making materials, and 80% of the cleaning work involves modeling material. [0003] Foreign countries attach great importance to the raw casting sand used in the production of resin sand, and the selection of s...
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IPC IPC(8): B22C5/00B33Y70/00
CPCB22C5/00B33Y70/00
Inventor 解明国吴友坤徐琤琤尹化保
Owner ANHUI HELI CO LTD