92 results about "Rapid casting" patented technology

The invention relates to a rapid wax injection mold manufacturing process based on a photo-curing 3D printing technique and belongs to the technical field of rapid manufacturing of molds. The rapid wax injection mold manufacturing process comprises the following steps: firstly building a mold component three-dimensional model and carrying out structure optimization design and shell-drawing design, secondly forming a mold shell three-dimensional model through photo-curing 3D printing to manufacture a resin mold shell, then mounting a metal cooling pipeline in the resin mold shell; finally preparing a metal resin mixture by taking epoxy resin, epoxy curing agents and metal powder as the raw materials, and filling the metal resin mixture in the resin mold shell and manufacturing the rapid wax injection mold after the metal resin mixture is completely cured. Through the rapid wax injection mold manufacturing process based on the photo-curing 3D printing technique, the manufacturing cost of the wax injection mold can be reduced; the manufacturing cycle of the wax injection mold is shortened; the manufactured wax injection mold is high in mechanical strength, high in heat conduction performance and long in service life; the practicability of the wax injection mold in the casting field can be effectively improved; the wax injection mold is conveniently popularized and applied in the field of single-piece, small-batch and rapid casting.

The invention discloses a method for three-dimensional jet-printing, forming and casting of a core. The method comprises the comprises the following steps: (1) spreading film covering sand to form a thin layer, and selectively injecting bonding liquid into the film covering sand by using a three-dimensional jet-printing device so that particles in the film covering sand can be bonded with one another to form a first layer; (2) forming a second layer by using the same method in the step (1), repeating the step (1) until a part is formed completely, and standing the part in a powder bed for a period of time so as to obtain an initially formed blank; and (3) heating the initially formed blank at the temperature of 170-220 DEG C until the bonding liquid completely volatilizes, and cross-linking and curing with phenolic resin, so that the casting of the core is finished. According to the method, the method for three-dimensional jet-printing, forming and casting of the core is simplified; the film covering sand can be accumulated layer by layer without drying conditions among layers, so that the fast casting forming of the core is finished; finally, a produced piece is relatively high in intensity, low in cost and high in efficiency; the method can be used for producing the casting core with the large size and a fine structure, and has a wide application prospect.

The invention discloses a non-pre-buried type abnormal-shaped bent water channel hot-work die and a manufacturing method of the non-pre-buried type abnormal-shaped bent water channel hot-work die. The manufacturing method is characterized in that casting-state die workblank manufacturing is achieved by combining a ceramic core or a 3D printing core with a traditional sand casting method, and includes the steps of die workblank manufacturing, casting-state die workblank coarse machining and casting-state die workblank finish machining. The die workblank manufacturing includes the steps of manufacturing a cavity, an abnormal-shaped bent water channel core and a casting system, assembling the die, smelting steel, carrying out rapid casting, and carrying out cleaning, shot blasting, annealing, post-processing and flaw detection on the abnormal-shaped bent water channel core and a water collecting groove inlet-and-outlet core. The casting-state die workblank coarse machining includes the steps of casting-state die workblank profile coarse machining, quenching and tempering. The casting-state die workblank finish machining includes the steps of casting-state die workblank profile finish machining, casting-state die workblank matching face finish machining and profile PVD plating. The non-pre-buried type abnormal-shaped bent water channel hot-work die and the manufacturing method of the non-pre-buried type abnormal-shaped bent water channel hot-work die solve the problems that an abnormal-shaped bent water channel with optimized values cannot be achieved through a traditional mechanical drilling manner and the cooling rate of the traditional mechanical drilling manner is uneven, and have the advantages that the profile temperature is even, and the die machining cost is reduced.

The invention relates to the technical field of metal molding and casting, in particular to a method for quickly casting a large precision casting based on a 3D printing technology; through combination of a 3D printing and molding technology and a lost foam casting technology, by using special shell type coatings, a casting without the defects of recarburization, pores, slag inclusion or wrinkledskin can be cast, and the requirements of a high grade and complex structure and the precision casting can be met; and the method has the advantage of green, environmental protection and no pollution.The method comprises the steps of three-dimensional modeling, making of a fusible model and a special shell mold, boxing of the shell mold, negative pressure pouring and the like. The method has theadvantages of simple processing technology, no need of developing a mould, short production time, easy regulation and modification, low production cost, green, environmental protection and no pollution, and the molding process can be finished in real time; the requirements of individualization and customization cam be met; high quality products can be made, and massive casting and precision casting are both taken into consideration.

The invention discloses a rapid molding method of a sodium silicate sand mould and belongs to the field of rapid casting. The rapid molding method comprises the following steps: (1), establishing a three-dimensional entity model of a sodium silicate sand mould to be molded, taking the Z axis as the molding direction, and setting molding layer thickness; (2), first, paving one layer of molding sand material, and then spraying an adhesive so as to form the current layer of outline pattern, wherein the adhesive is a mixed solution of sodium silicate and polyvinyl alcohol; (3), carrying out microwave heating on the current layer of outline pattern, and forming the current layer of sand mould outline; (4), stopping microwave heating, and lowering the work table for a height of one layer thickness along the Z axis; and (5), repeating steps (2-4) until the sodium silicate sand mould is molded. The method meets the high requirement of sodium silicate sand hardened through microwave heating on the mould, solves the problems that the surface of the sodium silicate sand mould becomes powdery due to overheating and easily absorbs moisture, and further overcomes the poor feasibility, difficult molding sand storage and difficult molding sand recycling defects of the existing micro-injection bonding sodium silicate sand rapid molding technology.

The invention belongs to the technical field of rapid casting and discloses a casting mold three-dimensional printing formation method. The method comprises the following steps of 1, preparing a liquid binding agent; 2, preparing mixed powder; and 3, putting the liquid binding agent prepared in step 1 into an ink-jet printing head of rapid formation equipment, putting the mixed powder prepared in step 2 into a powder cylinder, starting the rapid formation equipment to conduct three-dimensional printing formation, in the printing process and/or after part printing is completed, solidifying a part through heating and/or microwave drying, and after solidification is completed, removing excessive powder, so that the needed casting mold part is obtained. According to the casting mold three-dimensional printing formation method, the liquid binding agent is a water-based binding agent and stable in property; the situation that a nozzle is blocked due to deterioration of the liquid binding agent cannot occur easily; technological stability of casting mold three-dimensional printing is improved; it is helpful to lower use cost; in addition, an inorganic binding agent material is adopted, and the gas generation amount of a casting mold is reduced; and it is helpful to reduce possibility of generation of defects such as air holes in a casting.

The invention discloses a rapid casting method for a cylinder cover of a diesel engine. According to the method, a one-box one-piece sand core assembly is adopted, by a lateral pouring and bottom injecting type casting mode, molten iron is poured from one side of the sand core assembly and enters the cavity of a cylinder cover of a sand core, and thus, the cavity of the cylinder cover is filled with the molten iron from bottom to top. The method is suitable for rapid casting of a new product, the product verification period is short, the cost is low, and the requirement of real-time changing of the new product is met. The invention further discloses a sand core assembly for rapidly casting the cylinder cover of the diesel engine. The sand core assembly is compact in structure and reasonable in design, when the cylinder cover of the diesel engine is casted by the sand core assembly, mold filling is stable, slag stopping performance is good, air is discharged smoothly, core assembling isfacilitated, a casting of which the wall thickness is uniform and accurate is easily obtained, and the product quality of the casting is improved.

The invention discloses an aluminum-scandium alloy sputtering target material and a preparation method thereof, and belongs to the technical field of high-performance aluminum-scandium alloy target materials. In the aluminum-scandium alloy target material, the content of scandium is 5 at%-50 at%, and the balance is aluminum. The preparation method comprises the following steps of 1, preparing materials; 2, smelting and casting ingots; 3, calcining or rolling; 4, sampling and detecting; 5, milling and cleaning; 6, carrying out vacuum packing. According to the present invention, the aluminum-scandium alloy target material is prepared through a vacuum induction levitation melting furnace and a rapid casting and rapid condensation technology, and the thickness of the prepared aluminum-scandiumalloy target material is 2-35 mm, the density is 99.9%, the scandium content is 5-50 at%, and the balance is the aluminum element. The preparation method is easy to operate, the alloy is uniform, theutilization rate of the expensive metal scandium is high, and the industrial application is facilitated. The characteristics of good component uniformity and good subsequent machinability satisfy therequirements of the semiconductors and the sputtering target materials in the special fields, and the defects in the prior art are overcome.

The invention provides the preparing method of glass die, comprising the following steps: 1. making glass die three-dimensional CAD modeling, and making resin master mold used for casting die blank by high-rate forming machine; 2. making resin master mold used for casting spark handling electrode; 3. making core and wood former used for casting die blank; 4. shaping and pouring glass die; 5. making ZrO2 molding pattern and casting spark handling electrode; 6. spark handing glass die, and getting glass die. The invention firstly carries out three-dimensional modeling and makes resin master mold, then uses gypsum model and resin to make core of die blank, and uses blank wood former to shape; the invention uses ZrO2 molding and resin master mold which enlarges the model size to 0.5 - 1.5mm to make spark handling electrode. The method can quickly get die blank and electrode.

The invention relates to a method to identifying slices of rock scraps and preparing the slice sample, specially applied to field fast sample fabrication for petroleum well drilling, washing the sample of petroleum drilling rock scraps by water and carbon tetrachloride, then making surface soak-modification processing by silane coupling agent or chrome complex coupling agent, filtering and drying and pouring in a container, adding in adhesive, solidifying agent and accelerant, uniformly blending, shaking on a shaker and then keep static for 20 minutes, and able to make field grinding to make slices at once. It need no open fire, has no pollution, simple and short-cut, heightens slice making efficiency by 4-6 times in comparison with existing slice making methods by examination, suitable for making sample on the spot for petroleum well drilling

The invention discloses a sand mold composite molding method, and belongs to the field of rapid casting. The method comprises the following steps: according to the complex structural characteristics of a casting mold, carrying out a layering process in the horizontal direction; according to the module structure of each divided area, determining the processing method: when a subarea of the casting mold contains a runner, the casting mold in the subarea is large and heavy and accounts for a large amount of volume, a digital control forming method is adopted; when a casting mold contains a complicated inner cavity structure, a dispersed/accumulated forming method is adopted; molding the lower part of the casting mold by cutting, after the molding of the lower part of the casting mold, molding the upper part of the casting mold by accumulating so as to finish the molding of the casting mold; and finally cleaning to remove the waste sands so as to obtain the sand casting mold. The method can achieve large and medium casting mold molding in any shape, and can improve the manufacturing speed and quality of casting mold by selecting proper partition positions.

A self-spreading high-speed casting method for emergency manufacture of the parts for armoured car includes such steps as preparing aluminothermic welding flux, preparing mould from furan resin sand, loading said welding flux in resin crucible burying the igniting TiC flux in welding flux, igniting, self-spreading aluminothermic reaction to obtain molten iron, casting, and solidifying.

The invention belongs to the technical field related to rapid casting and discloses a manufacturing method for a ceramic shell core for precision casting. The method comprises the steps that firstly,modeling is carried out for a ceramic shell core to be manufactured according to a casting structure, and area division is carried out according to precision of the ceramic shell core to be manufactured; secondly, slurry used by corresponding areas of the ceramic shell core to be manufactured, the diameter of extruding heads, the forming speed and the layer height are determined according to the precision requirement, and layered slicing is carried out on the corresponding areas of the ceramic shell core to be manufactured; and thirdly, the multiple extruding heads are adopted for carrying outcollaborative forming on the ceramic shell core to be manufactured, so that the ceramic shell core is obtained. The invention further provides a device for realizing the manufacturing method. According to the device, the multiple extruding heads are arranged, and are controlled independently, the limitation that an existing rapid forming technology can only achieve mixed extrusion forming of a single material or two materials can be overcome, the problem that in the prior art, extruding heads cannot achieve precise positioning, and a blank is scratched can be solved, and forming efficiency and precision are improved.

An apparatus for uphill low pressure casting of molten metal in sand molds conveyed in synchronized manner with a casting station located at the conveyor, a gas pressure holding furnace containing the molten metal and located at the casting station with a rising casting tube connectable to the sand molds has a device for refilling the holding furnace with molten metal. To permit a rapid casting cycle and high casting capacities, the refilling device has at least one pressure-tight melt container and a filling tube located in the holding furnace with a seal positioned outside the same. The melt container is couplable in pressure-tight manner by means of its outlet to the holding furnace filling tube. The holding furnace is connected to the melt container by means of a pneumatic pressure compensating line.

The invention discloses a fast investment casting technology of a stainless steel impeller employing a 3D printing solid mould in the field of the investment casting technology. The fast investment casting technology comprises the following steps: arranging a venting pore channel in the 3D printing solid mould, and then sealing the venting pore channel with ordinary wax; welding the solid mould and a molten mould into a whole to form a mould group; coating the surface of the mould group with modified silica sol to form an integral mould shell; removing a mould shell closing the venting pore channel from the integral mould shell, melting the molten mould and the ordinary wax; airing, putting the whole formed by the mould shell and the solid mould into a roasting furnace in a state that the solid mould is positioned on the upper part, ablating the solid mould in an oxygen-riched state, closing a furnace door after sufficient combustion, stopping the furnace after sufficient ablation, cooling and taking out the mould shell; washing the mould shell to remove residues and residual ash, and then sealing a part, removed in the former step, of the mould shell; putting the mould shell into the roasting furnace, roasting, and then casting high-temperature metal melt to obtain a cast. The fast investment casting technology has the advantages of low manufacturing cost, high production efficiency, low possibility of mould shell cracking and the like.

The invention belongs to the field of rapid casting and discloses a casting method of a ceramic/metal integrated part on the basis of layering extrusion forming. The method comprises the steps that 1,the three-dimensional structure of a ceramic shell and the three-dimensional structure of a ceramic core are designed according to the shape of the part; 2, a multi-ceramic-material and multi-head layering deposition forming method is adopted, and precision overall forming of multi-ceramic-material layer gradient structure shell is achieved; 3, blanks of the ceramic shell and the ceramic core aresubjected to drying, degreasing, sintering and after-treatment; 4, the treated ceramic shell and the ceramic core are preheated, and molten metal filling is completed through vacuum precise casting;and 5, after molten metal is cooled completely, the ceramic core is removed, an internal hole channel of the metal and ceramic part is formed, and the ceramic/metal integrated part is obtained. According to the method, by means of the layering extrusion forming method, double-layer or three-layer ceramic shells with different thicknesses and compactness degrees can be prepared, the vacuum precisecasting technology is combined, filling of the molten metal is completed, and precise casting forming of the ceramic/metal integrated part is achieved.