344results about How to "Reduce casting costs" patented technology

The invention provides a method for producing a single crystal-like silicon ingot by utilizing a polycrystal ingot casting furnace. The method comprises the following steps: spraying a coating on the inner surface of a crucible; sintering the coating and cooling to room temperature; placing a single crystal silicon material and a polycrystal silicon material into the crucible in turn, and placing the crucible into a graphite supporting box; placing the graphite supporting box into the polycrystal ingot casting furnace without bottom edge carbon bars; vacuumizing the polycrystal ingot casting furnace; heating and monitoring temperature; introducing argon when the polycrystal ingot casting furnace is heated to a preset temperature; when the polycrystal silicon material begins to smelt, moving a heat-isolating cage in the polycrystal ingot casting furnace to the top of the polycrystal ingot casting furnace; and when the polycrystal silicon material is completely smelted, reducing the heating temperature, controlling the silicon material to solidify at constant speed to grow the crystal, thereby forming the single crystal-like silicon ingot. According to the method provided by the invention, the present polycrystal ingot casting furnace is utilized to realize the production of the single crystal-like silicon ingot; the casting cost of the single crystal-like silicon ingot is reduced; the large-scale production of the single crystal-like silicon ingot is boosted; and the invention also provides the polycrystal ingot casting furnace for producing the single crystal-like silicon ingot.

The invention discloses an automobile press fit die transmission and positioning mechanism, which comprises a positioning plate mounting plate, an assembly transportation positioning plate, a lifting jack and a fixing device, wherein the top surface of the positioning plate mounting plate is vertical to the stamping direction of an automobile press fit die; the assembly transportation positioning plate is mounted on the top surface of the positioning plate mounting plate and faces to a stamping piece in the automobile press fit die; the distance between the assembly transportation positioning plate and the stamping piece is adjustable; the lifting jack is capable of jacking and dropping down the positioning plate mounting plate and the assembly transportation positioning plate; the fixing device is used for fixing the lifting jack. According to the automobile press fit die transmission and positioning mechanism, the height direction and the horizontal direction of the stamping piece transportation positioning mechanism are adjustable, the loading and the discharging of the stamping piece are more stable and safer, and the space is saved; the adjustable positioning mechanism is adopted, the problem that the positioning mechanism intervenes with a press fit cutter block mounting seat and an upper die under the existing die height is solved, and the die height is reduced to 1000 mm, and therefore, the mixed routing manufacturing of different products is realized, the casting cost is reduced, the tool development expense is reduced, and the processing, the detachment, the debugging and the production are facilitated.

The invention relates to a casting method and in particular relates to a method for casting an automobile axle housing by a V method. The method comprises the steps of (1) covering a model with a film; (2) adhering a casting head; (3) spraying coating on the surface film of the model; (4) drying the coating; (5) performing sand compaction; (6) rotating a sand box after the sand box is lifted out, and putting a loam core and cold iron into the sand box; (7) combining an upper box and a lower box; (8) preparing furnace burdens; (9) performing pouring. According to the method disclosed by the invention, a casting is high in casting quality, high in yield and low in casting cost.

The invention discloses environment-friendly casting molding sand which is made of the following raw materials in parts by weight: 200-230 parts of quartz sand, 50-60 parts of sodium bentonite, 20-30 parts of red soil, 30-40 parts of talcum powder, 20-30 parts of zinc oxide, 20-24 parts of Chinese medicine residue, 40-45 parts of straw powder, 2-3 parts of carboxymethyl cellulose, 5-8 parts of brown sugar, 1-2 parts of fatty alcohol polyoxyethylene ether, 40-50 parts of brick trash powder, 2-3 parts of boric acid, 40-45 parts of perlite, 2-3 parts of polyving alcohol, 1-2 parts of tung oil, 30-35 parts of bamboo charcoal and a proper amount of water. According to the invention, the brick trash powder is adopted, the Chinese medicine residue, the straw powder and the like are sintered at high temperate, the sand is loosened, breathable and good in collapsibility and is environmental-friendly and energy-saving, and with the combination of talcum powder, the dispersity and the plasticity are improved; due to adoption of brown sugar, tung oil and carboxymethyl cellulose as binding agents, the sand is not only good in binding effect, but also not affected in collapsibility at high temperature; the pass percent of cast pieces is improved, and the casting cost is lowered.

The invention relates to a graphene-rare earth-lanthanum reinforced Al-Si-Mg cast aluminum alloy and a preparation method thereof. The aluminum alloy comprises the following raw material in mass percent: 6.5 to 7.5% of silicon, 0.25 to 0.45% of magnesium, 0.30 to 0.50% of cerium, 0.001 to 0.005% of graphene, less than or equal to 0.05% of iron, less than or equal to 0.2% of zinc, less than or equal to 0.1% of manganese, less than or equal to 0.1% of titanium, less than or equal to 0.15% of zirconium, less than or equal to 0.1% of beryllium, less than or equal to 0.05% of tin, less than or equal to 0.1% of lead, less than or equal to 0.10% of other unavoidable elements, each of which is equal to or less than 0.03%, and the balance of aluminum. The mechanical property of the aluminum alloy is remarkably improved through uniformly adding a small amount of graphene and rare earth lanthanum in the alloy, and the comprehensive mechanical property is significantly improved when being comparedwith the prior art, so that the application range of aluminum alloy materials in the fields of automobile, aerospace and the like is greatly enlarged.

The invention relates to a spheroidizing agent and a preparation method and application of the nucleating agent in spheroidal graphite cast iron smelting, and belongs to the technical field of metallurgy. The spheroidizing agent is composed of 41%-44% of Si, 7.5%-8% of Mg, 2.0%-2.5% of Y, 0.3%-0.5% of Ce, 0.1%-0.3% of Sc, 0.2%-0.6% of Mn, 3.0%-4.0% of Ca, 0.1%-0.3% of Al, 8%-15% of nano SiC with the grain size being 15-25 nm, and the balance Fe. A melting-mixing method is adopted and the spheroidizing agent is crushed to ultrafine powder with the grain size being 20-60 [mu]m. The invention further discloses the preparation method and application of the spheroidizing agent in spheroidal graphite cast iron smelting. Spheroidal graphite cast iron is obtained through spheroidizing twice by means of the spheroidizing agent, specifically, a first nucleating agent layer is placed on the side of the spheroidizing agent of a spheroidizing tundish and coated with a first spherical spheroidizing agent; the first spherical spheroidizing agent is coated with a first pig iron sheet layer; a second nucleating agent layer is overlaid on the first pig iron sheet layer, then a second spherical spheroidizing agent layer, a second pig iron sheet layer and a third nucleating agent layer are sequentially overlaid on the second nucleating agent layer, and spheroidizing and inoculation treatments are conducted by pouring in iron liquid. Obtained spheroidal graphite cast iron castings are high in strength, toughness and size stability.

The invention discloses a large-duty loader hydraulic valve body casting mold. The large-duty loader hydraulic valve body casting mold comprises an upper shell mold body, a lower shell mold body, a sand core and a pouring and riser system. The sand core comprises a core head, a main core body and small core bodies. The main core body is composed of seven longitudinal arbors and four transverse arbors, and the longitudinal arbors and the transverse arbors are horizontally arranged in the same plane. The main core is provided with a plurality of convex blocks. Installation grooves are formed in the convex blocks. The small core bodies are fixed to the main core body through the installation grooves. The pouring and riser system comprises two exothermic and insulating risers with the diameter being 90 mm and the height being 120 mm. The large-duty loader hydraulic valve body casting mold has the advantages of being reasonable and compact in structure, high in reliability and convenient to assemble and cast, the straightness of a blank casted through a main valve hole is controlled to be smaller than 0.8 mm, assembly errors of a complex sand core are avoided, the casting defects of shrinkage cavities, shrinkage porosity, internal pores and the like of a casting piece are overcome, and the compactness of the internal structure is improved, so that leakage is avoided under a high-pressure working condition with the rated pressure being larger than or equal to 35 Mpa; and the casting qualified rate is improved greatly, and the casting cost is reduced.

The invention relates to a multi-passage valve body casting. The multi-passage valve body casting comprises a valve body, horizontal flow passages, a longitudinal flow passage and flow passage ports, the valve body is shaped like a cuboid, the two horizontal flow passages are arranged side by side in the valve body, the lower ends of the two horizontal flow passages communicate with each other via the longitudinal flow passage, the front and back of the valve body are respectively provided with two flow passage ports which communicate with the two horizontal flow passages, the middle parts of the two horizontal flow passages are respectively provided with three annular grooves, the upper ends of the annular grooves of the upper ends of the horizontal flow passages are provided with through holes, the openings of the through holes are located on the valve body, the left side of the middle annular groove of the left horizontal flow passage is provided with a through hole, the opening of the through hole is located at the left side of the valve body, the right side of the middle annular groove of the right horizontal flow passage is provided with a through hole, the upper ends of the annular grooves of the lower ends of the horizontal flow passages are provided with through holes, and the right side of the longitudinal flow passage is provided with a through hole. The multi-passage valve body casting has the following advantages: the design is simple, the multi-passage valve body casting is convenient to use and cast, and is ingenious and reasonable, the casting percent of pass is increased greatly, and the casting cost is reduced.

The invention discloses a green sand single box feederless foundry method for a glass mold and belongs to the field of glass mold foundry. The method comprises the following steps: firstly, positioning sand cores are manufactured; then a wood pattern template provided with a pair of bottom molds, sand core matrixes, pouring gate molds as well as a filter screen gap is manufactured according to the size of the blank of the glass mold; the wood pattern template is fixed on a moulding machine, a frame is arranged on the wood pattern template in a covering manner, one positioning sand core is respectively placed on the sand core matrixes at two ends of the bottle molds, and a filter screen is placed into the filter screen gap: the frame is filled with green sand, and the moulding machine is opened. The wood pattern template and the frame filled with the green sand are over turned, and the wood pattern template is removed; a releasing agent is sprayed into the bottle cavities of the bottle molds; molten iron is poured from the pouring gate mold cavities of the pouring gate molds, the frame, a chiller sand core and the positioning sand cores are removed, and the blank is obtained after the green sand is removed; and the pouring gate iron is removed, and the glass mold is obtained. The utility model has the advantages that the raw materials are saved; the finish of the inner chamber surface and the parting surface of mold are improved; the casting cost is lowered; and the environmental conservation is achieved.

The invention provides a gypsum model precise casting technology and relates to the technical field of casting technologies. The gypsum model precise casting technology comprises the following steps that gypsum slurry is prepared; grouting is carried out, a box frame in which a module is installed is placed into a grouting chamber, then vacuumizing is carried out to 0.05-0.06 MPa, and the slurry is stably poured into the box frame; roasting is carried out, step temperature rise is adopted, and heat is preserved for a certain period of time in each section, so that the temperature of the innerwall and the temperature of the outer wall are consistent; casting and casting cleaning are carried out; and after a gypsum model is dried completely, gravity casting is carried out, and for large thin-wall precise castings, great careful clearing, repairing and correcting are carried out after casting. According to the gypsum model precise casting technology, the crack risk of the castings can bereduced greatly, size precision is high, the casting cost is low, the casting quality is good, and defects of air holes, shrinkage holes, shrinkage depression, rising and the like are avoided.

The invention discloses a casting device capable of being continuously used. The casting device comprises a working table and further comprises a supporting frame, a top plate, a hydraulic cylinder, an upper mold hanging plate, an upper mold, a high-pressure casting box, a lower mold installation plate, a lower mold, an ejector rod, a motor, a cam disk and a high-pressure spraying device. Compared with the prior art, the upper mold and the lower mold are pushed by the hydraulic cylinder to be assembled, melted metal liquid is injected into cavities of the upper mold and the lower mold through the high-pressure casting box, after the metal liquid is solidified, and the upper mold is pulled by the hydraulic cylinder to move upwards; meanwhile, the high-pressure spraying device sprays high-pressure gas, releasing agents are mixed into the gas, the cam disk is driven by the motor to rotate, when the highest point of the cam disk reaches the top end, the ejector rod is pushed to upwards move, a casting is released from the lower mold, the casting can be smoothly related accordingly, a traditional sand mold is replaced, one mold can be repeatedly used, and the casting cost is reduced.

The invention discloses a preparation method of an environment-friendly casting binder, which relates to an improvement of a casting binder, and provides the preparation method of an environment-friendly casting binder that does not discharge noxious and harmful gases in the producing and using process. The preparation method of the environment-friendly casting binder adopts the technical proposal which comprises animal glue, fatty acid, alcohol, an anti-gelling agent and a catalyst with the content of each component by weight is: 30 to 60 units of animal glue, 20 to 40 units of fatty acid (or C12-C18 organic acid), 10 to 20 units of alcohol, 10 to 20 units of anti-gelling agent, 1 to 2 units of mineral acid catalyst and the remaining of water.

The invention relates to a lost foam casting process of a low-alloy cast steel wheel for port machinery. The lost foam casting process comprises the following steps: firstly, pre-foaming and forming; secondly, preparing a coating, coating a template, and coating after assembling a casting system and the template; thirdly, designing a casting system process; fourthly, shaping; fifthly, performing the casting process steps; sixthly, finishing all castings, keeping negative pressure for 15 minutes, standing and cooling for at least 12 hours, and opening a box. According to the lost foam casting process, various technical difficulties are overcome, the application range of the lost foam casting technology is expanded, the casting cost is greatly reduced, and the concept that people often think that low-alloy cast steel is forbidden zone of lost foam casting is broken through; small-batch pilot tests and large-batch production practices show that the one-time qualification rate of casting products reaches about 95%.

The invention discloses a composite casting system of a crank shaft box. The composite casting system comprises a base plate core, a jacket core, a main core, an end face core, an outer cast core and a pouring system. The base plate core, the jacket core, the main core and the pouring system are sequentially overlapped from the bottom layer to the high layer to form a crank shaft box sand mould structure. The pouring system comprises two rows of pouring openings evenly arranged and gates located outside the two rows of pouring openings. The two rows of pouring openings are communicated with a pouring opening cup through a flow division pouring gate and a pouring gate cup. The gates comprise hole-shaped gates located at four corners and strip gates located between the hole-shaped gates and outside the two rows of pouring gates. The composite casting system adopts a rain type pouring system in the middle of a cast piece to conduct liquid feeding pouring from a plurality of positions of a shaft seat and reduces impact of pouring to casts, floating impurities cannot be easily adhered to the cast wall or the cast core, and the pouring system is good in slag blocking effect. The main core is arranged on the upper portion of a sand mould and on the shaft seat, and the two strip gates and the four hole-shaped gates are utilized to discharge air completely. The composite casting system does not require core drying and is stable in cast piece pouring.

The invention relates to a forward skewed multi-blade impeller with a narrow cavity, which is used for a centrifugal fan and is low in noise, and an integral casting technique thereof. The impeller comprises a base plate and a hollow front plate, and narrow blades are installed along the circumference between the base plate and the front plate. The difference lies in that the blades are arc-shaped; the radial length of each blade is 20mm-30mm; the outlet height H of the meridian plane of each blade is 10mm-20mm; the number of the blades distributed along the circumference is 20-60; and the whole impeller is integrally cast. The impeller is compact in structure, low in noise, light in weight, high in structural strength and simple and convenient in maintenance. By adopting a moveable blade mold structure to fabricate an impeller inner core blank removing mold so as to finish the integral casting of the impeller, the invention solves the technical problem of blank removal failure of a closed impeller with a narrow cavity and has the advantages of high casting precision and good quality of the impeller, low casting cost and high production efficiency. The technique is widely applicable for integral casting of various multi-blade impellers, with the effect obviously better than that of similar products.

The invention provides spheroidal graphite cast iron. The spheroidal graphite cast iron comprises, by mass, 3.35%-3.7% of C, 2.3%-2.7% of Si, 0.35%-0.55% of Mn, 0-0.035% of P, 0-0.015% of S, 0.016%-0.018% of Re, 0.02%-0.04% of Mg and 0.55%-0.85% of Nb, and the total amount of trace elements including Cu, Zn, Sn, Mo, Al and Zr is smaller than or equal to 0.22%. The tensile strength of the spheroidal graphite cast iron is larger than 750 MPa, the yield strength is about 560 MPa, and the percentage elongation after fracture is 7.5% or above. The invention further discloses a preparation method of the spheroidal graphite cast iron. According to the preparation method of the spheroidal graphite cast iron, the processes of normalizing as well as hardening and tempering heat treatment are omitted, and the prepared spheroidal graphite cast iron has high strength and high plasticity at the same time.

The invention discloses a large-duty loader hydraulic valve body casting. The large-duty loader hydraulic valve body casting comprises a valve body, perpendicular runners, horizontal runners, auxiliary runners and runner openings. The valve body is internally provided with the six perpendicular runners, the seven horizontal runners and four horizontal transverse runners. The perpendicular runners from the first one to the sixth one communicate with the four transverse runners, and the second transverse runner and the third transverse runner communicate with the seventh longitudinal runner; the first transverse runner communicates with the seventh longitudinal runner through an inclined runner, the fourth transverse runner does not communicate with the seventh longitudinal runner, and the six perpendicular runners communicate with the midpoint of the perpendicular runners from the first one to the sixth one; and the multiple auxiliary runners are formed between the horizontal runners and the perpendicular runners, and the seven horizontal longitudinal runners are provided with a plurality of oil grooves. The large-duty loader hydraulic valve body casting has the advantages of being high in integration level, reasonable and compact in structure, high in reliability, convenient to cast, use and maintain, safe, capable of saving energy, long in service life and wide in application range, the casting qualified rate is increased greatly, and the casting cost is reduced.