33results about How to "Good sand resistance" patented technology

The invention discloses a magnesium aluminum spinel powder alcohol-based coating for heavy section steel castings, and relates to a casting coating. The alcohol-based coating comprises the following components in percentage by weight: 55 to 60 percent of magnesium aluminium spinel powder, 0.5 to 1.2 percent of binder, 0.11 to 0.18 percent of suspended thickening agent, 1.1 to 1.8 percent of suspending agent, 2.7 to 4.2 percent of fluxing agent, and the balance of organic solvent. In the magnesium aluminum spinel powder alcohol-based coating, the particle size of the magnesium aluminum spinel powder is between 270 and 320, and Al2O3 is more than or equal to 78 percent. The magnesium aluminum spinel powder is synthesized by electric smelting technology, has the characteristics of low expansion and high smelting point, and meets the requirement of serving as refractory aggregate of the coating for the steel castings; and the magnesium aluminum spinel powder has obvious price and resource advantages than zircon powder.

The invention discloses a preparation method of a polyurethane composite bearing of a double-layer structure and belongs to the technical field of sliding bearings. The polyurethane composite bearingis composed of a hard polyurethane outer layer (2) achieving the supporting and bearing effects and a soft polyurethane surface layer (1) with the self-lubricating and anti-abrasion functions. Firstly, a cylinder mold is adopted, the soft surface layer is cast through a centrifugal casting method, and the outer surface of the surface layer is ground, cleaned, dried, and then coated with an adhesion agent to serve as a mold core; and then the hard outer layer is cast on the outer surface of the surface layer, and the bearing is formed by adhering and composing the layers through the adhesion agent. According to the preparation method of the polyurethane composite bearing of the double-layer structure, the bearing has the technical characteristics of being high in bearing, capable of achieving water-breaking operation within a short time, resistant to silt, easy to machine, low in cost and the like, and the domestic market vacancy is made up; and a composite material integrally has the excellent properties of being resistant to changing of the high and low temperature and hydrolysis and the like, the service life is long, and the polyurethane composite bearing can be widely applied to the rotary or swing sliding portions of water pumps, propeller stern bearings, rudder bearings and the like.

This invention relates to a high bauxite molding sand and its preparation method composed of a high bauxite, high Al powder, 85% rare H3PO4 solution and bentonite, in which, the high bauxite and the Al powder are the main materials, 85% rare H3PO4 is a bond matched with suitable bentonite in the following weight percentage: high bauxite: 55-75, high Al powder 25-40, 85% rare H3PO4 solution 5-15 and bentonite 2-5. The preparation method includes: dry-mixing the bauxite and the Al power in a sand grinding machine, then adding the H3PO4 steadily to mix them in wet, finally adding bentonite to be mixed and taken out for standby and the mixed sand should be used within 12 hours for avoiding hardened.

The invdention relates to a compound environment-friendly paint suitable for high-chromium white cast iron and a preparation method thereof and belongs to the field of casting. The paint comprises, bymass, 10-20% of zircon powder, 10-25% of aluminum silicate powder, 25-35% of high-purity aluminum oxide, 3-8% of a suspending agent, 2-6% of a binder, 4-10% of a modifying agent, 0.1-0.5% of a surface active agent and 20-30% of solvent. The preparation method of the paint comprises the steps that burdening is carried out according to the above mixing ratio, 80% of the total mass of the solvent isadded to a reaction kettle firstly under the condition of stirring; then the rest of components, except for the solvent, are all added, and the new mixture is stirred for over half an hour by a high-speed dispersion machine; and finally, the baume degree of the rest of the solvent is adjusted till being greater than 90 Be, and accordingly the paint is obtained. The paint has high refractoriness and coating strength, and the casting cost of paint production is effectively reduced.

The invention discloses an alcohol-based coating for a cast iron stove. The coating comprises, by weight, 30-40 parts of epoxy resin, 10-15 parts of glass fiber, 4-8 parts of borax, 1-3 parts of nanosilicon dioxide, 10-15 parts of binder, 30-40 parts of pentaerythritol and 30-40 parts of isoamyl alcohol. According to the alcohol-based coating, pentaerythritol and isoamyl alcohol are used as mainraw materials, borax and nano silicon dioxide are added to improve the heat resistance of the coating, glass fiber is added to improve the strength of the coating and prevent sand sticking, epoxy resin is added, and the binder is added to improve the fluidity and viscosity of the coating.

The invention discloses an environment-friendly cast iron stove paint. The environment-friendly cast iron stove paint is composed of raw materials including, by weight part, 30-40 parts of acrylic acid, 1-5 parts of sorbitan monooleate, 2-8 parts of lanthanum oxide, 2-8 parts of barium oxide, 10-15 parts of quartz powder, 3-6 parts of green tea powder, 3-6 parts of modified starch, 3-6 parts of carboxymethyl cellulose, 20-30 parts of ethyl alcohol and 40-60 parts of water. The environment-friendly cast iron stove paint is environmentally friendly in raw materials, high in refractoriness and good in sand adhesion resistance and stripping effects, achieves a casing removal rate of 94% before castings are shot-cast, reduces cleaning costs and working hours and further greatly reduces the labor intensity of aftertreatment workers.