61results about How to "Reduce the amount of sand used" patented technology

The invention discloses a method for producing a novel light-weight wall material by mixing coal slag. The coal slag produced by a thermal power plant replaces 20-100% of sand. On the one hand, the consumption of the sand is reduced, the production cost is lowered greatly, resources are saved, waste materials are recycled, and the environmental pollution is relieved. On the other hand, early hydration heat of concrete mixed with the coal slag is reduced, the sulfate resistance of the concrete is improved, and the impermeability has the direct bearing on the carbonization resistance, freezing resistance and erosion resistance of the concrete and further has an important effect on shrinkage and creepage of the concrete. In addition, the coal slag is lighter than the sand, so that the volumetric weight of the concrete mixed with the coal slag is reduced; a wall is light in deadweight; the mounting efficiency is improved; for mechanical properties, compression resistance and a suspension force of the light-weight wall material mixed with the coal slag are greatly higher than those of a light-weight wall material used for construction and produced by mixing no coal slag; and the method has very good economic and social benefits.

The present invention discloses a sand blasting rust removal apparatus, which comprises: a wet sand conveying device, a wet sand drying device, a dry sand tank, a sand blasting head, an air compressor, an air heating tank, and a hot air nozzle. During sand blasting rust removal operation, dry sand enters the dry sand tank, air is conveying into the air heating tank through the air compressor to be heat to form high pressure hot air, the dry sand is directly blasted on a steel workpiece under a high pressure hot air effect to carry out rust removal operation, a surface effect of the rust-removed steel workpiece is good, an anticorrosion standard of paints is achieved, the hot air nozzle can directly blow the high pressure hot air to the steel workpiece so as to produce a good rust removal effect and reduce a use amount of the sand, and rust removal can be performed only by using the high pressure hot air without the dry sand if the rust of the workpiece is less. In addition, the surface of the rust-removed workpiece is heated, paint adhesion is strong, and an anticorrosion effect is strong.

The invention discloses a sand core used for sand casting and a preparing method thereof. The method comprises the following steps of S1, sand core (1) design; S2, sand core (1) preparing; S3, fillersand discharging and S4, glue sealing of a sand discharging opening (3). A cavity (2) is formed in the sand core (1), the sand discharging opening (3) is formed in one end of the sand core (1), a sanddischarging piston (4) is arranged on the sand discharging opening (3), and an exhaust hole (5) is formed in the sand discharging piston (4). According to the preparing method of the sand core used for sand casting, the use amount of moulding sand and resin can be greatly reduced, the resin gas volume is reduced, the decoring and sand shakeout efficiency can be improved, the regeneration efficiency of a used sand machine is improved, resource consumption, waste discharge and cost are reduced, production efficiency of the casting can be improved, and the feasible technology and method of greencasting is achieved.

The invention provides a pouring sand mould of arc needles for pasture collection machinery and a pouring method. The pouring sand mould includes an upper shell body, a lower shell body and core assemblies; the upper shell body is of an arc structure, and a first straight pouring gate is formed in the arc structure and is communicated with a pouring cup for storing pouring liquid; the lower shellbody is of an arc structure matched with the upper shell body, and a second main pouring gate penetrating through the upper and lower ends of the lower shell body is formed in the portion, corresponding to the first straight pouring gate, of the lower shell body; after the upper shell body and the lower shell body are buckled, at least one first mould cavity is formed, the mould cavities are in arc shapes, the first straight pouring gate and the second straight pouring gate are both communicated with the mould cavities, and after the mould cavities are subjected to pouring, arc needle castingsare formed; the core assemblies are arranged inside the mould cavities and are used for assisting the mould cavities in forming the arc needle castings. According to the pouring sand mould of the arcneedles for the pasture collection machinery and the pouring method, the sand mould is changed into a shell type from an overlapping type; an allowance gate is additionally formed, during pouring, sand consumption is reduced, and the finished product rate is increased.

The casting mold includes upper mold and lower mold, and each of the upper mold and lower mold includes movable mold and static mold. The movable mold includes fixing board on the movable mold plate, electric heating board on the fixing board, mold board combination on the heating board, sand box on the mold board combination with sand jetting port, and casting ball or casting-forging mold fixed on the mold board combination. The static mold includes fixing board on the static mold plate, electric heating board on the fixing board, and base board on the heating board. The assembled movable mold and static mold are fixed directly mold jetting machine, sand is jetted into the closed mold via the sand jetting port to form sand mold with the sand box-mold board combination, and after heating to cure with the heating board, open the mold. The present invention has laminated sand molds and results in high casting quality, high production efficiency, low labor strength and low casting cost.

The invention discloses a chain wheel sand mould and a method for pouring a chain wheel by using the chain wheel sand mould. The chain wheel sand mould comprises an upper shell, a lower shell and a sand core, wherein the middle portion of the upper shell is provided with a first middle hole, the upper shell is provided with an annular protrusion, a pouring ring is formed between the annular protrusion and the edge of the upper shell, the annular protrusion is provided with a first pouring channel, and the side of the upper shell is provided with a first sprue communicating with the pouring ring; the middle portion of the lower shell is provided with a second middle hole, the upper and lower surfaces of the second middle hole are provided with a first pouring cavity and a second pouring cavity correspondingly, and the position, corresponding to the first sprue, of the side of the lower shell is provided with a second sprue communicating with the second middle hole; the end of the secondpouring cavity is closed, and the lower shell is provided with a second pouring channel; the sand core is arranged on the annular protrusion in a sleeving manner; and the inner wall of the sand coreis provided with a gear cavity.

The invention relates to the technical field of train accessory machinery, particularly to a rail surface air drying machine, which includes a first switch and a second switch, wherein both the firstswitch and the second switch are electrically connected with a fan through wires; an air outlet pipe is fixedly connected with the output end of the fan, and the other end of the air outlet pipe is fixedly connected with two position change-over switches; the output ends on the two sides of the two position change-over switches are respectively connected with a first heater case and a second heater case through pipelines. According to the invention, through arranging the fan and the heater cases, the rail surface is changed to be dry and clean to enable the engine in traction to be in a stableand steady running speed without being affected by rain and snow and unclean steel rain surface, as a result, the running speed is improved, idle sliding of the engine is avoided, and running behindschedule and slope stopping and slowing down are fundamentally avoided.

A sand-mold molding method for a water turbine blade includes the following steps of model manufacturing, molding with the model, box closing and box erecting. By means of the sand-mold molding method for the water turbine blade, the sand consumption can be lowered, the production cost can be reduced, and the molding production cycle can be shortened.

The invention discloses a casting long and thin hole forming sand core structure. End portion fireproof casing pipes, a transition fireproof casing pipe, a process steel pipe, a casing pipe bonding resin layer, an outer sand core layer, an inner sand core layer and end face sealing layers are included. The transition fireproof casing pipe is arranged between the end portion fireproof casing pipes,the transition fireproof casing pipe and the end portion fireproof casing pipes are in butt joint through the casing pipe bonding resin layer to form a hollow fireproof casing pipe. The process steelpipe is coaxially arranged in an inner hole of the fireproof casing pipe. A ventilation hole is formed in a pipe body of the process steel pipe. The outer sand core layer is arranged between an innerhole of the process steel pipe and the inner hole of the fireproof casing pipe. The inner sand core layer is arranged in the inner hole of the process steel pipe. The end face sealing layers are arranged at the two ends of the outer sand core layer. An air outlet channel is arranged at the center of the inner sand core layer. According to a long and thin casting hole sand core of the structure, the defects that an ordinary sand core is low in surface fireproof degree and is prone to burning losses, burning through, washing damage or washing fracture through high-temperature molten iron can beeliminated, sand discharging and process steel pipe recycling and repeated usage are facilitated, the sand usage amount is small, and the casting cost is low.

The invention discloses a multi-layer combined type container corner fitting precoated sand shell mold and a pouring process, and particularly relates to the technical field of container corner fitting precoated sand shells and pouring processes. The multi-layer combined type container corner fitting precoated sand shell mold comprises a corner fitting precoated sand shell whole body and a movable pouring cup, and the number of the layers of the precoated sand shell whole body is one to four. According to the combined type container corner fitting precoated sand shell and the pouring process, two layers, three layers, four layers and at most four layers can be arranged as a group to pour 16 corner fitting castings, the finished product efficiency of the corner fitting castings can be improved through sand shell pouring, the overall finished product efficiency of the corner fitting precoated sand shell is improved, the molten steel pouring frequency and weight are reduced, a chilling block is arranged in the sand shell in the shell manufacturing process, the distance between the sand shell and the chilling block is 3-4 mm, the chilling block is not in direct contact with molten steel in the casting process, shrinkage cavities of corner piece castings cannot be generated due to the fact that the molten steel is cooled too fast, and the problems that according to an existing container corner piece precoated sand shell and pouring process, the molten steel utilization rate is low, the finished product percent of pass is low and cost is high are solved.

The invention provides a filter for casing. The filter comprises a flow inlet, an upper liquid storing area, a lower liquid storing area, a filter screen groove, a window, a sticky core and a flow outlet, wherein the flow inlet is formed in the top of the filter and used for guiding molten iron into the filter; the upper liquid storing area and the lower liquid storing area are arranged below the flow inlet and used for reducing flow speed of iron liquid and enlarging the contact area between the molten iron and a filter screen, the filter screen groove is formed between the upper liquid storing area and the lower liquid storing area, the cross section of the filter screen groove is rectangular, the boundary size of the filter screen groove is larger than the section size of the liquid storing areas, the filter screen groove is used for bearing a filter screen, the window is arranged on the side face of the width direction of the filter screen groove, and used for inserting the filter screen into the filter screen groove, the sticky core is installed on the window in a clearance fit manner, the flow outlet is formed in the lower portion of the lower liquid storing area, the flow outlet and the flow inlet are distributed symmetrically with the filter screen groove as an axis, and the flow outlet is used for connecting flow input points of a casting cavity. A filtering system utilizes the multiple filters to be combined in many forms to be suitable for producing castings of different structure shapes and various weights.

The invention discloses a concrete formula for a high-strength tubular pile and a mixing and curing process thereof. The formula comprises 380-430 kg/m <3> of cement, 80-150 kg/m <3 > of a mineral admixture, 1100-1300 kg/m <3> of coarse aggregate, 400-500 kg/m <3> of fine aggregate, 6-8 kg/m <3> of a water reducing agent and 1-2 kg/m <3> of polyethylene particles or polystyrene particles, and the polyethylene particles or polystyrene particles contain reinforced fibers. According to the concrete formula for the high-strength tubular pile and the mixing and curing process of the concrete formula, the sand consumption and the water consumption can be reduced, meanwhile, the concrete has good flowability, the strength and the toughness of the tubular pile are improved, and meanwhile, the pore defects in the tubular pile are reduced.

The invention relates to a method of using a maximum core iron in casting a casting. The method comprises the following steps: a. the maximum size of the core iron is made into a size less than that of a core cavity opening of the casting to be cast; b. the thickness of a sand-faced layer is made to be a thickness not less than 2.5-3mm. The method for using the maximum core iron in casting the casting can eliminate shrinkage pores and shrinkage around a sand core, improve the density of the periphery of the core and prevent leakage from the casting.

The embodiment of the invention discloses a train sliding viscosity increasing method and device.The method comprises the steps that the sliding degree and actual utilization adhesion of each train in a target network segment of a train are obtained, the train is divided into at least two network segments, each network segment comprises at least one train, and a sanding device is arranged on one train in each network segment; judging whether the target network segment meets a preset sanding tackifying condition or not according to the respective sliding degree of each vehicle in the target network segment and the actual utilization adhesion; if the preset sanding tackifying condition is met, the sanding speed is determined according to the speed of the train; and a sanding instruction is generated according to the sanding speed, and the sanding instruction is sent to a sanding device corresponding to the target network section, so that the sanding device corresponding to the target network section carries out sanding according to the sanding speed. The sand spraying tackifying agent has the beneficial effect of improving the sand spraying tackifying effect of the train.

The invention relates to a method for setting a low-pressure casting filling-mold air exhaust channel for a sand mold. The method comprises the following steps of: vertically drilling at least one deep hole for communicating the highest point of a cavity and the outside in the sand mold; downwards smearing a section of pasty fire resistant material layer in an orifice at the upper end of the deephole; drilling a small-aperture shallow hole communicated with the deep hole in the fire resistant material layer; and heating and hardening the fire resistant material layer, wherein when aluminum liquid rises steadily, the air in the cavity is exhausted from the small-aperture shallow hole; and when the aluminum liquid continuously rises through the deep hole in the sand mold and overflows fromthe small-aperture shallow hole, the aluminum liquid overflowing the plane of the sand mold is solidified quickly due to the relatively small aperture of the small-aperture shallow hole. Therefore, the air can be exhausted steadily during mold filling; after mold filling, the cavity is closed quickly, so that pressurization, pressure retention and crystallization are realized conveniently, and a reliable guarantee is supplied for improving the quality of a product. Furthermore, the height of a cover box sand mold is effectively reduced to 100 to 120 millimeters, the sand using amount of a cover box is reduced greatly, and the cost is saved.