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

The invention discloses a casting-purposed high-strength environmental-friendly water-based evanescent mode coating and a preparation method thereof. The casting-purposed high-strength environmental-friendly water-based evanescent mode coating is characterized by comprising the following raw materials in percent by weight: 40-30 percent of quartz powder, 30-40 percent of high alumina, 10 percent of limestone, 12 percent of adhering agent, 5 percent of suspending agent and 3 percent of dispersing agent. The preparation method comprises the steps of: firstly, fully stirring and uniformly mixing the 5 percent of suspending agent and the 3 percent of dispersing agent, and then adding the adhering agent and uniformly mixing for later use; then reacting with main aggregates mixed for 30mins for 1h and then discharging; and during use, regulating a ratio of powder to water between 1:1-1:0.8 to meet demands of different casts. The preparation method has the advantages of wide application range, high production efficiency, simple process and energy saving; raw materials are purely-natural nontoxic materials; the casting-purposed high-strength environmental-friendly water-based evanescent mode coating has the characteristics of easiness in cleaning, small thickness and good air permeability; and the cast-purposed high-strength environmental-friendly water-based evanescent mode coating only needs to be coated 2-3 times, so that labor intensity of workers can be reduced and production cost can be lowered.

The invention discloses molding sand for amorphous-state casting. The molding sand is formed by mixing crude sand with a binding agent; the crude sand comprises the following components in percentageby weight: 30-52% of SiO2, 15-20% of Al2O3, 15-30% of ZrO2, 0-3% of K2O, 2-10% of Na2O, K2O+Na2O less than 12%, and 1-5% of Ca2O; and the average particle size of the crude sand is within 0.03-2 mm. In the molding sand for casting, the crude sand thereof is an amorphous-state solid, is free of cleavage planes during crushing, and is low in expansion coefficient and excellent in thermochemical stability.

The invention discloses molding sands for glass matrix casting. The molding sands for glass matrix casting are prepared by performing mixing treatment on base sands and an adhesive. The base sands areprepared by the following components in percentage by weight: 50-65 percent of SiO2, 1-6 percent of Al2O3, 1-4 percent of ZrO2, 4-8 percent of K2O, 5-10 percent of Na2O, 1-5 percent of Ca2O, 6-10 percent of SrO and 6-10 percent of BaO, wherein the average particle size of the base sands is from 0.03mm to 2mm. By adopting the molding sands for casting provided by the invention, the base sands areobtained by CRT screen glass treatment, and the environmental protection problem of CRT screen glass recovery is solved; in addition, during crushing, a cleavage plane does not exist, the mechanical strength is high, and the thermal chemical stability is good, so that the production cost during casting production can be lowered, and the casting performance of the molding sands for casting is improved.

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 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 theresin 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 composite foundry sand material for preventing foundry sand sintering in steel cast casting and a preparation method thereof. After the material is casted and calcined at high temperature, the foundry sand of the material is of a scrobiculate loose structure, instead of a hard agglomerated cake, and the composite foundry sand material comprises the following components in percentage by weight: 40-65% of quartz sand, 35-60% of 70 sand and 1-1.2% of furane resin, and a curing agent accounts for 30-50% of furane resin. The composite foundry sand material has the advantages that after being casted and calcined, the composite foundry sand forms the scrobiculate loose structure, thereby damaging a quartz sand foundry sand sintered structure, generating no large agglomerated block, being easy for cleaning, greatly improving labor productivity and reducing production cost; in addition, the production materials (quartz sand and 70 sand) have low cost and wide sources; moreover, by using the composite foundry sand material, cracks, misrun and other secondary flaws caused by cleaning can be reduced, therefore, the quality of casts is improved.

The invention discloses a molding material for casting with anti-sintering and no sand-sticking functions, which comprises 80% of chrome ore sand, 5% of inert sand, 1-1.2% of furan resin and a curing agent accounting for 20-60% of the mass ratio of furan resin , the curing agent is benzenesulfonic acid; the inert sand is surface-treated alkaline ore, and the surface treatment method is to add a layer of neutral organic or inorganic film on the surface of the alkaline ore to form inertness. After calcination, it is cooled to room temperature to become a powder. The material is easy to solidify when using furan resin as a binder. After the molding sand is calcined at high temperature, there is no sintering or chemical sand sticking phenomenon. A substantial improvement over previous materials. In the same way to manufacture a complex metal part with a high melting point, compared with 3D printing, using this product to manufacture has a greater production cost advantage.

The present invention relates to a novel modified phosphate inorganic binder for aluminum alloy casting, and a preparation method thereof, wherein the novel modified phosphate inorganic binder comprises industrial phosphoric acid with a mass concentration of 85%, aluminum hydroxide, magnesium carbonate, boric acid, citric acid, zinc oxide, polyacrylamide, and deionized water. The novel modified phosphate inorganic binder has characteristics of high compressive strength, excellent adhesion property, excellent collapsing performance, and green environmental protection, and can not produce any toxic gases and condensates during processes such as sand mixing, modeling (core), hardening and casting. The preparation method has characteristics of simple process, flexible operation, and low cost.