352results about How to "Improve casting efficiency" patented technology

An immersion nozzle for continuous casting which enables improvement in quality of a slab surface and increase in the efficiency of casting by suppressing the self-excited oscillation of a flow in a mold without using a complicated mechanism such as a swirl flow generating immersion nozzle is to be provided. A first immersion nozzle for continuous casting is a nozzle comprising a cylindrical body and a pair of outlet ports formed to face each other in a side wall in the vicinity of a bottom part of the cylindrical body, wherein a ridge-shaped projection extending parallel with the discharge direction projected on a cross section of the nozzle is formed on an inner surface of the bottom part, which is formed in a waterfall basin-like recessed shape having a maximum depth of 5 mm to 50 mm. A second immersion nozzle for continuous casting is a nozzle comprising a cylindrical body and a pair of outlet ports formed to face each other in a side wall in the vicinity of a bottom part of the cylindrical body, wherein each sectional area of the outlet ports vertical to a discharge direction projected on a cross section or longitudinal section of the nozzle is decreased toward an exit.

A double-row type continuous casting system comprises a first casting machine, a second casting machine, a flow division device, a molten pool and a self-vibration device. One end of the flow division device is connected with the molten poor, and the other end of the flow division device is connected with the first casting machine and the second casting machine. The first casting machine comprises a casting part. The second casting machine comprises a casting part. The flow division device comprises an upper liquid pipeline, a buffer flow divider, a first flow division pipeline and a second flow division pipeline. One end of the upper liquid pipeline is connected with the molten pool, and the other end of the upper liquid pipeline is connected with the buffer flow divider. The side wall of the buffer flow divider is provided with a confluence inlet, a first flow division opening and a second flow division opening. According to the double-row type continuous casting system, double-channel simultaneous casting is achieved through the first casting machine and the second casting machine, and the purpose of improving the casting efficiency is achieved accordingly; and the flow division device is arranged to reasonably distribute molten metal for the first casting machine and the second casting machine, and double-channel casting is completed accordingly.

The invention discloses a continuously-cast crystallizer copper liner, which is prepared by a method comprising: preparing copper-aluminum alloy powder with an aluminum content of 0.03 to 0.6 weight percent, wherein the grain size of the copper-aluminum alloy powder is less than 150mum and the grain size of over 50 weight percent of powder is less than 74mum; filling the copper-aluminum alloy powder in an oxygen supply furnace, supply oxygen in a molar ratio of the oxygen to the aluminum in the copper and aluminum alloy of 3:2 to 6:2, and heating the copper-aluminum alloy powder to 100 to 300 DEG C to perform reaction for 3 to 30 hours; preparing dispersion copper powder ingot blanks; extruding the ingot blanks at 700 to 1,000 DEG C to a nearly formed pipe; drawing the extruded pipe blank by required specifications; and plating the surface of the drawn pipe blank. The copper alloy liner of the invention has the advantages that: casting efficiency can be improved greatly; the casting drawing speed can be improved by 1.5 to 2 times compared with the original drawing speed; the service life of the crystallizer copper pipe is improved greatly; and the productivity of the crystallizer is 1.5 to 3 times that of the traditional crystallizer.

The invention discloses a dual-station low-pressure casting machine, which comprises a rack, wherein the middle of the rack is provided with a table plane; the left and the right of the table plane are provided with two sets of hub modules in parallel; the rack is provided with a maintaining furnace below the table plane; the maintaining furnace is respectively communicated with cavities of the two sets of hub modules by two stalks and pouring gates on the two sets of hub modules; the rack is provided with an upper module lifting mechanism and a demoulding mechanism above the hub modules, wherein the upper module lifting mechanism drives an upper module to lift; the demoulding mechanism is used for separating the upper module and a hub which are tightly combined; and the rack is respectively provided with one set of material carrying mechanism on the left side and the right side of the two sets of hub modules to carry the demoulded hub. The dual-station low-pressure casting machine has the advantages of high casting efficiency and energy saving, and consumption and cost are lowered.

The invention discloses an efficient multipart multilayer stacked pouring system and technology. The system is characterized in that the pouring system is divided into a plurality of layers which are stacked; a sprue is arranged in each layer, and the sprues are cavities with pouring gates at the upper ends and the lower ends; the pouring gate of the pouring system body on the top layer is sleeved with a pouring gate cup, and the pouring gate at the lower end of each layer of pouring system body is arranged on the pouring gate at the upper end of the next layer of pouring system body in a sleeving manner; and the pouring gate of the bottom layer of pouring system body is sealed. Two or more transverse sprues are evenly distributed on the inner sides of the sprues, and are led to the inner pouring gates; and the inner pouring gates are communicated with product sand mould cavities; and the transverse sprues are circular-arc cavities, and slag accumulating plates are arranged on the inner walls of the cavities at the circular-arc upper ends of the transverse sprues. According to the efficient multipart multilayer stacked pouring system, each of the multiple layers of stacked pouring system bodies is provided with a plurality of inner pouring gates to pour a plurality of multilayer stacked castings, and the casting production efficiency is improved; and the casting time is shortened, the composition and temperature balance of multilayer cast molten iron can be ensured, and the quality of cast products can be improved.

An expendable casting process method for a heat-resistant steel perforated grate plate comprise employing a copolymerization material for foaming for preparing an expendable-casting-process heat-resistant steel perforated grate plate foam model, singly preparing a pouring gate, binding the heat-resistant steel perforated grate plate model with the pouring gate for combination, so as to form a combined model; putting the combined model in a special coating pool for three-time sagging of a coating and three-time baking, and controlling the accumulated thickness of the coating subjected to three-time baking to be 0.8 mm-1.5 mm; again combining the baked combined model in a negative-pressure sandbox by taking 10 models as a pouring body, and forming two pouring bodies; adding sand into the sandbox and compacting through shaking; vacuumizing the sandbox and performing oxygen-enriched combustion on the model to form a hollow shell; and finally performing casting. The casting method is simple in steps, convenient to operate, high in casting efficiency and good in effect, is capable of effectively improving the surface quality of the casting and preventing disadvantages that the casting generates burnt-on sand, sand inclusions, pores and carburets, and helps to reduce labor intensity and save production cost.

The invention discloses an aluminum wheel low-pressure casting water cooling die. A center die insert 8 is provided with a water cooling channel 9 for cooling the wheel center; a water cooling channel 7 for cooling the inner rim is arranged at the upper part of a head die 5; a lower edge die 2 is provided with a water cooling passage 3 for cooling a wheel hot spot. The casting technology mainly includes a slow-to-quick mold filling technology and a water-to-air cooling technology. According to the invention, the performance quality of the aluminum alloy wheel casting is improved, and the performance quality of the casting is greatly improved in stability and consistency due to the adoption of the slow-to-quick mold filling technology and the water-to-air cooling technology; the high water cooling intensity increases the freezing rate of the casting, thereby increasing the casting production efficiency; cooling water flows in the water cooling channels relatively sealed, so that noise pollution caused by compressed air in the air cooling technology is eliminated, and the casting working condition is improved.

The invention discloses a centrifugal casting system for an internal combustion engine air cylinder sleeve. The centrifugal casting system comprises a centrifugal machine, a pouring device, a spraying device, a pipe drawing device and a cleaning device. The centrifugal machine comprises a mould barrel for molding the air cylinder sleeve, end covers arranged at the two ends of the mould barrel, a power device and a transmission device connected with the power device. The transmission device comprises a hollow rotary shaft, the mould barrel is coaxially sleeved with the hollow rotary shaft, the hollow rotary shaft is supported on a bearing pedestal through a bearing, the power device drives the hollow rotary shaft to rotate, and therefore the mould barrel is driven to rotate. Compared with the prior art, the centrifugal casting system has the beneficial effects that the mould barrel is circumferentially restrained on the hollow rotary shaft, throbbing of centrifugal movement of the mould barrel is reduced, the rotating precision of the mould barrel is improved, and the quality and casting efficiency of a casting are improved; and when the mould barrel rotates at a high speed, weight blocks are subjected to the action of centrifugal force to move outwards, and therefore the end covers are locked through moving rods, and molten metal is prevented from being splashed.

the application discloses cylindrical part casting equipment which comprises a rotary worktable, a plurality of casting power heads, a casting device, a drawing device, a cleaning device, a spraying device and a control system, wherein the plurality of casting power heads are arranged on the periphery of the rotary worktable; the axial lines of rotating shafts of the casting power heads are in the radial directions of the rotary worktable; the rotating shafts of the casting power heads are used for connecting centrifugal casting moulds; the casting device, the drawing device, the cleaning device and the spraying device are arranged on the periphery of the rotary worktable, and are arranged in the rotation direction of the rotary worktable in sequence; each of the casting device, the drawing device, the cleaning device and the spraying device respectively corresponds to one casting power head; the control system is used for controlling the rotary worktable, the casting power heads, the casting device, the drawing device, the cleaning device and the spraying device to operate. The cylindrical part casting equipment can cast a plurality of parts at the same time; compared with manual casting in the prior art, the cylindrical part casting equipment has the advantages that the casting efficiency is greatly improved, and the manual labor intensity is reduced.

The invention discloses a material injection device of a die casting machine. The material injection device comprise a material cylinder and a plunger, wherein the material cylinder is used for containing molten metal liquid, the plunger is arranged in an inner cavity of the material cylinder, the material cylinder comprises a flat part and a gooseneck part which are in transition connection by an inclining part, the lowest point of the inclining part is lower than the lowest point of a material outlet of the gooseneck part, the plunger comprises a plunger head and a second plunger head which are connected by a plunger rod, a non-pressure chamber for containing the molten metal liquid is formed among the plunger head, the second plunger head, the plunger rod and the flat part, a pressure chamber for containing to-be-injected molten metal liquid is formed among the plunger head, the gooseneck part and the flat part, and a one-way flowing device is arranged between the non-pressure chamber and the pressure chamber, is sealed during material injection, and is opened in the plunger resetting process. The material injection device of the die casting machine has the advantages that the die casting cycle is short, the production efficiency is high, the qualified rate of products is higher, the heating temperature of the metal liquid is lowered, and the service life of a die and other parts is prolonged.

The present disclosure generally relates to integrated core-shell investment casting molds that provide a filament structure corresponding to a cooling hole pattern in the surface of the turbine blade, stator vane, or shroud. The disclosure also relates to the forming of a ceramic coating on at least a portion of the shell of the core-shell casting mold.

The invention provides a process for improving the metallographic structure of a piston head and increasing casting production efficiency. The process comprises the steps of: (1) eliminating an exhaust hole and an exhaust nail on a bottom die, and meanwhile reducing the thickness of a wall between the bottom die and a cooling water cavity, respectively subtracting 10mm from the length and the width of a casting head on an outer die, wherein the specifications of the length and the width are respectively 48mm-55mm and 48mm-54mm; and meanwhile, adding 10mm-12mm to the length L2 of the rear part of the outer die, and adding 5mm-8mm to the width D of the rear part of the outer die, wherein the specifications of the length L2 and the width D are respectively 176-mm-195mm and 78mm-85mm; (2) processing a tooling die; (3) preparing for the smelting of an aluminum liquid; (4) assembling and debugging the tooling die; (5) casting in field production; (6) hot treating a piston blank; and (7) detecting the quality of the piston. The invention can refine the metallographic structure of the piston head by 1-2 levels and improve casting efficiency by more than 15%.

The invention discloses an expansion-resistant nano building material for preventing smog and a preparation method of the expansion-resistant nano building material. The expansion-resistant nano building material is prepared from the following raw materials in parts by weight: 50 to 70 parts of active carbon, 12 to 20 parts of montmorillonite, 5 to 12 parts of nano titanium dioxide, 3 to 7 parts of silicon dioxide, 1 to 10 parts of gamma-aminopropyltriethoxysilane, 6 to 12 parts of hydroxypropyl methyl cellulose and 5 to 10 parts of oligomerization 3-aminopropyltriethoxysilane. The added nitrile rubber modified phenolic resin is mixed with raw materials to be cured by heating, and the molten resin is converted rapidly from a linear structure to a non-molten mass structure under the effect of methylene separated from methenamine; and the mechanical performance is improved, so that the expansion-resistant nano building material has high temperature resistance and low expansion performance. The expansion-resistant nano building material has the characteristics of high adsorption capacity, relatively good thixotropy, heat stability, plasticity, viscosity, high dry pressure and the like. By adding reinforcing agents such as coal gangue, conductive mica powder and nano conductive graphite powder, the heat aging resistance and crack resistance can be improved, so that the casting efficiency can be improved, and the casting cost can be reduced.

The invention discloses a truss robot in the field of casting transferring mechanisms. The truss robot comprises a transverse moving mechanism, and a plurality of supporting assemblies which are sequentially arranged from left to right, wherein each supporting assembly comprises a first vertical column and a second vertical column which are structured the same and oppositely arranged in front-back direction; the first vertical columns and the second vertical columns are fixed to a foundation; the transverse moving mechanism comprises a transverse supporting block; a fixing supporting seat is fixedly connected to the upper sides of the first vertical columns and the second vertical columns; the transverse supporting block can horizontally linearly move in the length direction of the fixing supporting seat; a horizontal moving mechanism is in sliding connection with the transverse supporting block; a vertical moving mechanism which linearly move in the vertical direction is arranged on the horizontal moving mechanism; a rotatable clamping mechanism for clamping a sand core is arranged at the lower side of the vertical moving mechanism. The truss robot is compact in structure, high in intelligence degree, and high in casting efficiency.

The invention discloses a box clamping device of a small sand box for casting, and relates to the technical field of sand box clamping apparatuses. The device comprises a handle and fixing jaws; the handle comprises a cam and a columnar handle, the cam is fixedly connected with one end of the columnar handle, a rotating shaft is arranged in the cam, the fixing jaws comprise a first fixing jaw and a second fixing jaw, the first fixing jaw and the second fixing jaw are symmetrically arranged with the cam as the center, and are used for fixing and clamping the sand box, through the cam and the rotating shaft which are arranged at one end of the handle, the first fixing jaw, the second fixing jaw and the handle are relatively connected, meanwhile, the position of the cam is adjusted through the columnar handle, the first fixing jaw and the second fixing jaw are in the loosened and shrinkage states, and pouring work is finished. Through the device, in the casting process, the small sand box is fastened, the defects of sand inclusion, air holes and the like of castings are overcome, integrality and size stability of casted sand moulds can be effectively ensured, the structure is simple, use is convenient, and casting efficiency is improved.

The invention discloses a graphene fiber modified nano adsorbing material and a preparation method. The nano adsorbing material comprises organic silicon resin, an organic solvent, glass beads, titanium dioxide, quartz sand, silicon carbide micro powder, nano cerium oxide, oxalic acid polyesters, light calcium carbonate, high-water-retention resin polyvinyl alcohol, a dispersing agent, a thickening agent, a brightening agent, zinc sulfide, foamed aluminum, hydroxypropyl methyl cellulose, nano silica, an adhesive, cobalt naphthenate, molybdenum, nickel, propylene glycol and chromium. Due to the fact that molecules of chitosan has positive charges, bacteria with negative charges can be adsorbed, and the material has a sterilization function; structurally, fibrous membrane layers with different diameters and pores are prepared, and in combination with nano graphene between the layers, the porosity and specific surface area of a composite adsorption membrane are improved, and effects are enhanced; by the adoption of pitch-based carbon fibers, the mechanical properties of the material are enhanced, and harmful gas and dust substances in tail gas can be greatly adsorbed and removed.

The invention provides an aluminum alloy gear shifting hub casting defect control method and belongs to the technical field of liquid metal forming. The aluminum alloy gear shifting hub casting defectcontrol method comprises the steps of detecting the casting temperature in the actual casting die opening process to obtain a casting temperature field; conducting defect detection on actually cast aluminum alloy gear shifting hub casting products to obtain shrinkage porosity casting defect forming areas in the actual casting process; establishing a casting process finite element simulation analysis model, simulating the gear shifting hub die filling and solidifying process through professional casting simulation software ProCAST, comparing the simulation result with an actual detection result and carrying out necessary correction on parameters; and conducting simulation analysis and optimization on technological parameters such as dies, casting temperatures, die preheating temperatures and casting speeds through the simulation model, and obtaining qualified castings with the aluminum alloy gear shifting hub casting shrinkage porosity casting defects improved effectively through trialcasting. Thus, the purposes of improving gear shifting hub casting defects and improving the casting quality are achieved.