33results about How to "Sand cleaning is easy" patented technology

The invention discloses a shell making process for elongated hole flange investment casting, which comprises the following steps: firstly forming a shell on the surface of an elongated hole flange waxpattern through spreading a surface layer, spreading a transition layer for the first time and spreading the transition layer for the second time, then blocking one end of a hole with pasty refractory paste after completely drying, then pouring refractory sand with 100-120 meshes into the other end of the hole, blocking the other end also with the pasty refractory paste after compactly pouring, then spreading a backing layer for the first time, spreading the backing layer for the second time after drying, drying again, carrying out slurry sealing, and finishing the shell making process. Compared with the prior art, the shell making process has the biggest characteristic that the refractory paste is adopted for blocking the elongated hole, then the refractory sand is poured, and then the next steps of backing layer spreading, slurry sealing and the like are carried out. The shell made through the process does not drill steel after pouring, sand is easily cleaned, and meanwhile, the drying time is greatly shortened from the original 7 days to 4 days, and the quality is improved from the original lower than 20 percent to more than 95 percent.

The invention discloses easily scattered precoated sand and a preparation method thereof. The easily scattered precoated sand is prepared from the following raw materials in parts by weight: 60-80 parts of zircon sand, 15-20 parts of river sand, 10-15 parts of montmorillonoid, 2-4 parts of thermoplastic phenolic resin, 0.5-1 part of anilino-methyl-triethoxysilane, 4-6 parts of triethyl citrate, 2-3 parts of polyvinyl formal, 10-15 parts of urotropine, 3-4 parts of urea, 1.5-2.5 parts of potassium dichromate, 4-6 parts of manganese ore slag, 2-3 parts of salicylic acid, 3-5 parts of butadiene-acrylonitrile rubber powder, 4-8 parts of ethylene bis-stearamide and 3-6 parts of composite powder. The precoated sand has excellent scattering property, the sand is easily cleaned after a casting is cooled and is subjected to sand shakeout, an inner cavity is smooth, the labor intensity of cleaning is obviously reduced, and the precoated sand has the characteristics of high strength, high liquidity, high air release amount, high heat resistance, high air permeability and the like. Moreover, the defects of sand adhesion, air holes, cracks and the like in the casting can be overcome, the surface quality of the casting is improved, and the precoated sand is suitable for production of nonferrous metal castings such as aluminum alloys and copper alloys.

The invention discloses a paint formula, particularly discloses a lost foam steel-casting paint formula and a technology method thereof. The lost foam steel-casting paint formula comprises the following components: 40-60% of bauxite, 30-50% of zirconium sand powder, 1-3% of phenolic resin, 1-5% of white emulsion, 1-5% of silica sol, 1-5% of lithium bentonite, 0.1-0.5% of isopropanol, 0.5-2% of CMC and 0.1-0.5% of JFC. The technology method of the lost foam steel-casting paint formula comprises the following steps: 1, in the ratio of paint powder to water of 1:0.7, putting the paint powder and the water into a stirrer for stirring for 1-1.5 hours, then measuring baume degree, and controlling the baume degree between 65 and 70 through dilution with water; 2, according to production requirements, dip-coating for two times or three times; and 3, the thickness of a coating layer being 1-2 mm. White molds of the paint formula have good wettability, good coating and hanging properties, high strength and good air permeability.

The invention discloses an environment-friendly alcohol-based coating for sand mold casting. The environment-friendly alcohol-based coating comprises refractory aggregate, a binding agent, a compound suspending agent and an auxiliary agent, wherein the refractory aggregate comprises 60 to 70 parts of quartz powder, 20 to 30 parts of aluminum sesquioxide, 5 to 10 parts of talcum powder, 1 to 5 parts of calcium carbonate, and 10 to 20 parts of magnesium metal crosslinking acrylic acid resin; the particle size range of the refractory aggregate is 150 to 320 meshes; the compound suspending agent comprises the following constituents: 40 to 65 parts of lithium base bentonite, 20 to 35 parts of attapulgite, 0.5 to 2 parts of CMC, and 0.5 to 2 parts of PVB; the binding agent adopts 1 to 2 parts of thermoplastic phenolic resin; a carrier liquid adopts ethyl alcohol or ethylene glycol; the auxiliary agent adopts 0.2 to 0.5 part of defoamer normal butanol. The alcohol-based coating used for sand mold casting, which takes quartz powder as the main refractory aggregate, is not added with graphite, is a low-cost casting coating with an environment-friendly advantage, is high in refractoriness, good in anti-adhesive sand property, is easily peeled from casting after casting, and is easy for sand removal of the casting.

The invention discloses a paint formula, particularly discloses a lost foam casting-use paint formula and a technology method thereof. The lost foam casting-use paint formula comprises the following components: 45-65% of bauxite, 1-5% of silica sol, 20-50% quartz powder, 1-5% of phenolic resin, 1-5% of white emulsion, 1-5% of sodium bentonite, 0.1% of isopropanol, 0.1% of JFC and 0.3-0.5% of CMC. The technology method of the lost foam casting-use paint formula comprises the following steps: 1, in the ratio of paint powder to water of 1:0.7, putting the paint powder and the water into a stirrer for stirring for 1-1.5 hours, then measuring baume degree, and controlling the baume degree between 65 and 70 through dilution with water; 2, according to production requirements, dip-coating for two times or three times; and 3, the thickness of a coating layer being 1-2 mm. White molds of the technology method have good wettability, good coating and hanging property, high strength and good air permeability.

The invention discloses a refractory steel vimineous blind tube casting method and a mould thereof. The main point is that a compound core bone is arranged in a resin sand mould shell whose top is provided with an air exhaust hole, the bottom of the resin sand mould shell is provided with a bottom-injected pouring basin, the pouring cup height of the pouring basin is higher than the height of the resin sand mould shell. The invention adopts compound core bone to make sand core, the producing technique is simple, the mould does not deform during roasting and the bottom-injected pouring basin ensure the sand core not to be eccentric.

The invention relates to a sand core of a pipe mould, and belongs to the technical field of casting. The sand core comprises an inner sand core and an outer sand mould, wherein a cavity is formed between the sand core and the sand mould; the sand core comprises a barrel-shaped water glass sand core outer wall as well as sand blocks and saw dust in a cavity defined by the water glass sand core outer wall; the water glass sand core outer wall adopts an integral structure; the sand mould comprises a plurality of stacked individual sand moulds.

The invention provides a lifting cylinder shaft assembly of a mining dump truck. The lifting cylinder shaft assembly of the mining dump truck comprises a lifting cylinder support, a lifting cylinder shaft, an end cover and a gland, wherein the lifting cylinder support is provided with a shaft hole, the lifting cylinder shaft is provided with a shaft shoulder, a shaft section, at one side of the shaft shoulder, of the lifting cylinder shaft is installed in the shaft hole of the lifting cylinder support, the end cover is arranged at the end of the shaft section, at the other side of the shaft shoulder, of the lifting cylinder shaft, and the gland is axially arranged on the shaft shoulder in a pressing mode and fixed to the lifting cylinder support. The lifting cylinder shaft assembly of the mining dump truck is simple in structure and easy to machine, and the lifting cylinder shaft is high in strength, not damaged easily, stable and reliable in axial fixation, high in size accuracy and installation accuracy, and easy to detach and replace.

The invention discloses furan resin loaded nano ceramic modified molding sand. The furan resin loaded nano ceramic modified molding sand is characterized by comprising the components, by weight, 50-70parts of silica sand, 40-50 parts of quartz sand, 2-5 parts of manganese sand, 3-6 parts of white marble sand, 3-5 parts of glass sand, 3-6 parts of emery, 1-3 parts of borax, 2-4 parts of rare earthporcelain sand, 4-8 parts of coal ash, 5-10 parts of triethoxy-2-furan silane modified nano ceramic powder, 6-9 parts of furan resin, 4-7 parts of epoxidized polyurethane/2,5-di(aminomethyl) furan polycondensate, 2-4 parts of hyperbranched epoxy resin and 25-35 parts of water. The invention also discloses a preparation method of the furan resin loaded nano ceramic modified molding sand. The furanresin loaded nano ceramic modified molding sand has the advantages of being good in air permeability, flowability, and dispersibility, high in strength, good in heat resistance, excellent in comprehensive performance, smooth in casting surface, not prone to falling out, and capable of being recycled and reused.

The invention discloses a 3D printing clay molding sand mold device and method. The device comprises a computer and control system, a forming system, a powder spreading system and a clay molding sandmold; the computer and control system is connected with the forming system and the powder spreading system, the forming system is arranged on the upper part of the powder spreading system, and the clay molding sand mold is arranged in the middle part of the powder spreading system, a solution spraying system is arranged in the forming system, the solution spraying system is connected with a solution spraying system moving device, the solution spraying system, the solution spraying system moving device and a drying system are connected with a forming system moving device; and powder in the powder spreading system is located above a forming area bottom plate and a powder supplementing area bottom plate, a forming area bottom plate lifting device is connected with the forming area bottom plate, a powder supplementing area bottom plate lifting device is connected with the powder supplementing area bottom plate, and the powder spreading device is arranged between the solution spraying system and the drying system and is connected with the forming system moving device. According to the method adopted by a mold, the characteristics of low air permeability and low gas evolution can be kept, and the possibility of air holes in a casting is reduced.

The invention discloses a method of a silica sol narrow-channel closed impeller easy to clear a shell, and aims to provide a method with the advantages that sand on the surface of the large-diameter closed impeller of a casting piece can be conveniently cleared, the surface is bright and clean, and the casting piece similar to a high-temperature high-pressure silica sol mold shell product is ensured. The invention provides the technical scheme points that the method comprises the steps of S01, dewaxing; S02, roasting; S03, casting; S04, clearing the sand; and adopting a silica sol mold shell for dewaxing, wherein the dewaxing is carried out on the mold shell according to the parameters that the vapor pressure is 98kPa, the temperature is 100 DEG C, and the time is 15 to 25min. The roastingtemperature of the mold shell remains unchanged, and other casting processes remain unchanged. The sand of the large-diameter closed impeller of the casting piece is easy to clear, the surface is bright and clean, and the casting piece similar to the high-temperature high-pressure silica sol mold shell product is ensured. The problem that the large-diameter narrow-channel closed impeller adopts an alkali-explosion sand-clearing process is thoroughly solved. Meanwhile, the safety production of employees is further guaranteed.

The invention discloses a manufacturing method of core filler for investment casting, comprising the folloing steps: selecting chrome ore and sodium silicate as the ingredient at the ratio of 10:1, and fully stirring the ingredient. Because the invention adopts the technical scheme, after the chrome ore filler is hardened in the hole or groove of the core, the strength and the high-temperature strength of the core exceed those of the quartz sand and sagger sand. The surfaces of the ostiole, longhole and narrow groove are gloss and easy to remove the sand during finishing, and the ostiole has small possibility of deforming.

The invention discloses a casting box using a novel material, the casting box comprises the following components in parts by weight: 30-50 parts of molding sand, 1-5 parts of phenolic resin, 5-10 parts of a powdery coupling agent, 10-20 parts of water and 15-25 parts of carbon dioxide, the casting box is formed by mixing the molding sand, the phenolic resin, the powdery coupling agent and the water, molding, blowing carbon dioxide gas in a vacuum environment, and curing. And a forming cavity is formed in the box body, and the box body is used for casting metal products. According to the invention, the problems that the traditional material seriously pollutes the environment, does not meet the theme requirement of current national green casting and cannot fully meet the production requirement of casting the 350km axle box body are solved.