69results about "Foundry moulds" patented technology

A castable high temperature aluminum alloy is cast by controlled solidification that combines composition design and solidification rate control to synergistically enhance the performance and versatility of the castable aluminum alloy for a wide range of elevated temperature applications. In one example, the aluminum alloy contains by weight approximately 1.0-20.0% of rare earth elements that contribute to the elevated temperature strength by forming a dispersion of insoluble particles via a eutectic microstructure. The aluminum alloy also includes approximately 0.1 to 15% by weight of minor alloy elements. Controlled solidification improves microstructural uniformity and refinement and provides the optimum structure and properties for the specific casting condition. The molten aluminum alloy is poured into an investment casing shell and lowered into a quenchant at a controlled rate. The molten aluminum alloy cools from the bottom of the investment casting shell upwardly to uniformly and quickly cool the aluminum alloy.

The invention discloses a manufacture method for a slip sheet of an air conditioner compressor, relating to the parts of air conditioner compressors. The method comprises the steps of: taking the elements in percentage by mass: C 3.2-3.8%, Si 2.0-2.6%, Mn 0.5-1.0%, Cr 0.2.-0.6%, Mo 0.1.-0.6%, V 0-0.5%, B 0-0.1%, Ti 0.04-0.15%, Nb 0-0.5%, Cu 0-0.5%, P < 0.3%, S <0.1% and the balance of Fe; and carrying out smelting, inoculating, casting, grinding, quenching and tempering heat treatment, refining, polishing and ion-sulfurizing to manufacture the slip sheet product of the air conditioner compressor. According to the product, a certain amount of carbides and flake graphite and a tempered martensite substrate with good comprehensive mechanical property are formed in a cast structure, and the manufacture method overcomes the defects of high cost and tedious machining procedures of the traditional high-speed steel or stainless steel slip sheets.

The invention discloses a manufacture technology of a bimetal composite pipe, which comprises the following steps of: 1) smelting structure layer carbon steel liquid according to a smelting technology of a carbon steel oxidizing method, and smelting a base body structure high-chromium iron liquid according to a smelting technology of an alloy non-oxidizing method; 2) forming by means of centrifugal pouring, wherein a centrifugal metal molding paint can adopt resin-coated sand or water base zircon powder paint; 3) injecting the carbon steel liquid into a mould; 4) pouring the high-chromium iron liquid when the temperature of the surface of the carbon steel liquid reaches the semi-solidification status, forming a transition layer between two alloys, and mutually melding to form into an integrated casting piece; and 5) immediately putting the casting part into a heat preserving furnace or embedding into the sand after the casting part is demoulded to gradually reduce the temperature. By adopting the technology, the manufacture technology adopts the metallurgical combination without a gape between the carbon steel and the high-chromium iron, leads the composite pipe to have high use security, and has high wear-resistant and corrosion-resistant capability, thereby prolonging the service life of the composite pipe.

A core for investment casting processes includes a core comprising one or more ceramic materials; and an exterior layer of metal material not susceptible to oxidation under investment casting operating conditions. A method for casting a turbine engine component having an internal passageway includes the steps of forming one or more mold sections each having internal surfaces and at least one of the aforementioned cores for forming one or more turbine engine components having at least one internal passageway; assembling the one or more mold sections; introducing a molten alloy into the one or more assembled mold sections; and consuming the metal of the at least one core during the process.

The invention provides a novel modeling method for casting large-sized and ultra large-sized alloy steel track shoes. The method comprises the following steps of: placing a model on a shaping plate with a gas extracting box; covering a heated plastic film on a model form and the shaping plate; attaching the plastic film to each part of the form and the shaping plate through vacuum suction force; brushing a high temperature resistant costing on the model form attached with the plastic film; placing a sand box mounted with a gas extracting device on a model plate; forming a casting head and a gas outlet in an upper casting sand box; filling dry quartz sand into the sand box; ramming the casting sand by using a vibration table; scraping the sand model; covering an upper sealing sand box of the sand model by using a plastic film; pumping loose sand in the sand box to negative pressure so that the sand model is hardened; pulling out the hardened sand model to obtain the model form; making upper and lower sand models; setting a core; and closing the box for casting. Compared with the traditional sand model, the novel modeling method for casting the large-sized and ultra large-sized alloy steel track shoes, provided by the invention, has the following advantages that: the working environment is largely improved, the size accuracy and surface roughness of the cast are improved, long service life of the mold is obtained, the consumption of the casting sand and auxiliary materials is saved, energy is saved and emission is reduced.

An investment casting pattern is formed by forming a metallic first core element including at least one recess. The first core element is engaged to at least a mating one of an element of the die and a second core element. The recess serves to retain the first core element relative to the mating one. The die is assembled and a sacrificial material is introduced to the die to at least partially embed the first core element. The recess may be pre-formed prior to cutting the first core element from a larger sheet of material.

A method for the high pressure die casting of an engine block assembly having at least one cast in place cylinder bore in the engine block and a closed head deck surface, and the resultant engine block are disclosed. This closed deck high pressure die cast engine block assembly will preferably have at least two cast in place cylinder bores in the engine block formed by using a composite core of salt core material supported by at least one cylinder bore to be cast in place. The cylinder bores have a lower outer surface preferably defining at least one surface area that interfaces with the engine block during casting such that the at least one cylinder is cast in place in the engine block. An engine block water jacket—as defined by the salt core portion of the composite core—will preferably provide an open passage between each cylinder bore such that water may flow around and entire outer circumference of the upper outer surface of the cylinder bores. This provides better and more uniform cylinder wall cooling, reducing thermal hot spotting and bore wall distortion.

The invention discloses a high-strength nodular cast iron for automobile flywheels and a high-density cast molding method thereof. In the high-strength nodular cast iron base, the pearlite content is 90-95%, the ferrite content is 5-10%, and meanwhile, small amounts of Mn, Ni and Cr and trace amounts of Nb are added to perform alloy reinforcement. The high-strength nodular cast iron for automobile flywheels is composed of the following alloy elements in percentage by mass: 3.2%-3.8% of C, 2.0%-2.5% of Si, 0.1%-0.5% of Mn, 0.1%-1.0% of Ni, 0.2%-1.0% of Cr, 0.01%-0.25% of Nb, at most 0.08% of P, at most 0.025% of S, 0.02%-0.06% of Mg, 0.01%-0.05% of Re and the balance of Fe. The room-temperature tensile strength of the nodular cast iron is greater than 700 MPa, the HB is greater than 280, and the 500 DEG C high-temperature tensile strength is greater than 560 MPa. The live riser is provided with two independent flat riser necks to obtain the high-density flywheel casting, and the dynamic unbalance quantity of the flywheel is lower than 1270 g.cm, thereby enhancing the dynamic balance performance and safety.

The invention discloses a vent hole pricking device, which comprises a mounting bracket, wherein the top of the mounting bracket is provided with a beam, the beam is provided with a cylinder, the piston rod of the cylinder is connected with a needle mounting plate, and the needle mounting plate is provided with multiple needles. When in use, a core is arranged below the needle mounting plate, and then the cylinder is driven, so that the needle mounting plate moves downwards so as to prickle multiple vent holes on the core by the needle. The device has simple structure, is convenient in use, and can prickle the multiple vent holes on the core once, thereby improving the vent hole prickling efficiency, lowering the labor intensity of workers, and effectively ensuring the quality of castings.

The invention relates to a restorative method for ceramic cores with crack defects. The restorative method includes the steps that (1) polishing is carried out at the positions of the crack defects of the ceramic cores in the crack depth direction, the polishing depth is larger than or equal to 1/2 of the crack depth, and notch type groove structures are formed at the positions of the crack defects; and a silica solution and powder conforming ceramic core molding are adopted for mixing restorative slurry; (2) notch type grooves are cleaned; (3) the notch type grooves are cleaned with the silica solution, wherein after the silica solution in the notch type grooves are slightly dried, the restorative slurry is padded into the notch type grooves, and the padding depth is 1/3 to 1/2 of the groove depth; (4) a miniature oxyhydrogen flame gun is used for heating restorative parts of the ceramic cores, the heating temperature of the restorative parts is higher than 900 DEG C and is in the red state, and the state is kept for 3 seconds to 10 seconds; and the heated restorative parts are cooled to the room temperature; (5) the step (3) and the step (4) are repeatedly executed for restoring the remaining notch type groove parts until all notch type grooves are completed padded; and (6) abrasive paper larger than or equal to 800# is used for polishing for restoring the padding surfaces until the design requirements are met.

The invention provides a cylindrical casting piece pouring system preventing cracks and a design method thereof. The system includes a vertical cylinder, a gap runner and a casting piece body; the vertical cylinder is communicated with the rear end of the gap runner, and the front end of the gap runner is communicated with the casting piece body; an included angle of the upper side face of the gap runner with the vertical cylinder is an acute angle; the front end of the gap runner is provided with a repairing patch, and a feeding channel is formed. The gap runner includes a plurality of gap runner sections, and the vertical cylinder is communicated with a mold body through the plurality of the gap runner sections. The acute angle is formed between the gap runner and the vertical cylinder in a connection manner, so that directional stress concentration is caused, and the cracks are guided to be generated between the gap runner and the vertical cylinder, so as to release the casting piece stress and prevent the cracks from being generated in the casting piece body; the front end of the gap runner is provided with the repairing patch, the feeding channel is formed, a hot section moves outward, at the same time, a rounded transition formed by the repairing patch prevents stress concentration, and the cracks are guided indirectly to be generated in a specified part.

An air amplifier apparatus and method for transferring or filling sand particles into a flask of a molding machine. A plurality of nozzles are each mounted with respect to the molding machine. A pressurized fluid, such as discharged from an air compressor or other pressure forming device, delivers pressurized fluid into each nozzle. The pressurized fluid flows through a passageway of each nozzle and can follow a Coanda profile as it accelerates the particles through the passageways. The accelerated particles are then discharged into a void formed by the flask of and pattern in the molding machine.

The invention relates to an investment casting mould of a high-temperature alloy bending pipe. The investment casting mould comprises a bending pipe shell which is vertically placed, wherein the two pipe mouth ends of the bending pipe shell are horizontally arranged downwards and provided with annular runners, annular sprues with narrow clearances are formed in the annular runners and communicated with a bending pipe forming cavity of the bending pipe shell, the annular runners are communicated with vertical runners through non-linear runners which are horizontally arranged, and a spherical cap mouth communicated with the bending pipe forming cavity of the bending pipe shell is formed in the upper part of the bending pipe shell. By adopting the matching between the non-linear runners which are horizontally arranged and the annular runners having the annular sprues with narrow clearances for completing the conveying and casting of molten steel from the vertical runners to the bending pipe shell, the investment casting mould is simple in structure and convenient to cast, and can be used for effectively solving the problems that the surface quality is poor, the air tightness is poor and the groove part is loose, and improving the casting quality.

The invention provides a method for achieving directional solidification based on 3D printing of a multi-layer hollow shell mold. The multi-layer hollow shell mold structure serving as a casting moldis suitable for casting a casting through directional solidification due to the excellent cooling capability, but the multi-layer hollow shell mold structure is complex, manufacturing is difficult through a conventional method, and the accurate multi-layer hollow shell mold structure can be manufactured on the basis of printing of the 3D printing technology. When the casting is cast, after liquidmetal is poured into a cavity of the multi-layer hollow shell mold structure, the bottom of the multi-layer hollow shell mold structure is immersed in cooling water to be cooled, directional solidification is formed, along with ascending of the cooling water liquid level, the hollow layer is gradually filled with the cooling water from bottom to top, the liquid metal solidification interface is gradually upwards pushed in the vertical direction under the situation that the height of the liquid metal solidification interface is larger than the cooling water liquid level height, the same heat preservation conditions of various positions of the casting and stable directional solidification are achieved, accordingly, the defects of mixed crystals, spots and the like are reduced, and the purposes that the casting quality and performance are optimized, and the casting qualification rate is increased are achieved.

The invention discloses a molding sand sodium silicate binding and collapsing agent for casting. The agent comprises raw materials in percentage by weight as follows: 94.5-98% of sodium silicate, 1.5-2.5% of glucose powder, 0.2-2% of light calcium carbonate powder, 0.2-0.5% of a suspending agent and 0.1-0.5% of a preservative. According to the agent, the sodium silicate, an organic collapsing agent, an inorganic collapsing agent, the suspending agent and the preservative are successfully integrated, the agent is good in high-temperature collapsibility, excellent in sand binding preventing capability and capable of being adapted to multiple hardening methods, the dry strength of molding sand is high, the wet binding force of the molding sand is large, the drying time after CO2 hardening is shortened, and the recovery rate of used sand can be significantly increased.

A kit and method for creating a 3-dimensional toy includes a battery powered light, a container filled with a light curable polymer and one or more molds into which the light curable polymer is inserted. Optimal the kit may also include one or more sheets of transparent material to which the light curable polymer does not adhere and coloring which can be added to the light curable polymer. The method of forming a the 3-dimensional toy involves obtaining a mold, dispensing a light curable polymer into the mold; and then curing the polymer by applying light in the visible or near visible range to the polymer via a battery powered light.

The invention discloses a casting device and casting method for pouring a molten alloy into a mold cavity to manufacture a cast product. The casting device is characterized in that a plurality of vibrating components and an independent runner are arranged in a mold; the independent runner communicates with the mold cavity; the otherside of the runner communicates with a die-casting cylinder or a pouring gate; and the runner and the vibrating components are connected with an ultrasonic wave generation and control device to perform ultrasonic vibration. According to the invention, the time of ultrasonic vibration can be prolonged, holes generated by ultrasonic vibration can be effectively utilized to promote the formation of a plurality of dendritic crystals, and the dendritic crystals are smashed to further refine the structures of the dendritic crystals so as to improve the yield and quality of cast products.

The invention discloses an investment casting process production technology of spheroidal graphite cast iron. The investment casting process production technology includes the following steps that pasty wax-based pattern materials are pressed into a pressure cavity to obtain an investment pattern, and the investment pattern includes a casting portion and a casting head portion; the casting portionand the casting head portion are welded together to form an investment pattern set; a coating is applied to the investment pattern set, then drying and dewaxing are performed to form a formwork, andthe formwork is roasted, wherein the coating contains a spheroidizing agent and a nucleating agent, the spheroidizing agent is a yttrium-based spheroidizing agent which accounts for 0-30% of the massof the coating, and the nucleating agent accounts for 0-30% of the mass of the coating; and liquid iron is injected into the formwork from the casting head portion, cooling and formwork removal are performed, and then a cast part is obtained. The spheroidizing agent and the nucleating agent are added into the formwork so as to reduce degradated spheroidication and inoculation fading caused by ceaseless escape of magnesium and rare earth elements in the spheroidizing agent and the nucleating agent due to the fact that during casting, high pre-heating temperature of the formwork makes cooling ofthe cast part slow, then the spheroidal graphite cast iron cast part with the good properties is obtained, meanwhile, the finished product rate of the cast part is improved, and the cost is reduced.

The invention discloses a mold for manufacturing solid iron balls, and relates to the technical field of the solid iron balls. The mold comprises an upper mold base, a lower mold base, an upper mold body, a lower mold body and a lifting part, and hinge seats are fixedly arranged on opposite sides of the lower mold body; a bearing frame is fixed to one side face of the lower mold body, a receivingframe is in sliding fit with the bearing frame, and a set of mounting holes is formed in one surface of the lower mold base; the mounting holes are of a blind hole structure; the lifting part comprises an electric push rod; and one end of the electric push rod is fixedly connected with the inner walls of the mounting holes through a mounting base. The electric push rod can drive the lower mold body to move upwards, then a motor is started so that the hinge seats and the lower mold body can be driven to rotate along a rotating shaft on a fixed block, and at the time, a finished product in the lower mold body can fall on a receiving base along with the rotation of the lower mold body; and through cooperation of an H-shaped sliding block, a rectangular sliding groove, a guide column, a through hole and a second spring, materials can be collected, and the problem that an existing mold for the solid iron balls cannot collect the materials conveniently is solved.

The invention discloses a pouring method of an aluminum alloy thin-walled workpiece. The pouring method includes the following operating steps that 1, a silica sol shell with a surface shell, two back layers and a sealing layer is selected, wherein the thickness of the shell ranges from 3 mm to 5 mm; 2, the shell is subjected to ultrasonic treatment, then dry and hot air is adopted for air blowing, and the shell is preheated; 3, aluminum alloy liquid is poured, the pouring temperature is 30-50 DEG C added on an aluminum alloy liquid phase line, the pouring speed meets a Kalgin formula, a pressure pouring method is adopted, and the pressure in a pouring tank ranges from 2.3 MPa to 2.5 MPa. By the adoption of the casting method, the roughness of the surface of the aluminum alloy thin-walled workpiece can be effectively reduced, the reject rate can be reduced, and the quality and production efficiency of the aluminum alloy thin-walled workpiece are greatly improved.

The invention discloses an automatic punching device for a cylinder body water sleeve. The automatic punching device comprises a steel structure bracket, an air storage tank, a first air cylinder, a second air cylinder, a third air cylinder, universal wheels, an operating electric cabinet and a PLC program controller; the steel structure bracket comprises an upper platform and a lower platform, the air storage tank is arranged on the lower platform, a groove is formed in the middle of the upper platform, a positioning jig is arranged in the groove, and a first side face air drill and a secondside face air drill are arranged on the two sides of the positioning jig correspondingly; the first air cylinder and the second air cylinder are arranged at the edges of the two sides of the upper platform correspondingly, a bottom air drill is arranged at the bottom of the upper platform, the third air cylinder is also arranged at the bottom of the upper platform, and the third air cylinder drives the bottom air drill to vertically penetrate through the upper platform and the positioning jig; the air storage tank communicates with the first air cylinder, the second air cylinder and the thirdair cylinder through an air pipe; the air pipe is provided with an oil cup, a pressure gauge, a pressure adjusting valve and an air filter; and the PLC program controller is arranged on the upper sideof the operating electric cabinet, and the universal wheels are mounted at the bottom of the steel structure bracket.

The invention discloses a disc type casting member superpose pouring apparatus convenient to dismount. The apparatus is characterized in that a baseboard (1) is provided with multiple layers of sand molds (2), the sand molds (2) are superposed, an upper pressure plate (3) is arranged on the top layer sand mold (2), and the top layer sand mold (2) is provided with a gate pouring cup (11); the superposed sand molds (2) are arranged in a cylinder sandbox (4), and fixed screws (7) are uniformly distributed in the inner circumference of the cylinder sandbox (4) to fasten the upper pressure plate (3) and the superposed sand molds (2); and the body of the inner cup (12) of the gate pouring cup (11) is designed to be a filter screen (14), and the bottom between the inner cup (12) and an outer cup (13) is provided with a pouring gate (15). The apparatus improves the production efficiency of casting members, guarantees the dimension precision of the casting members, and improves the yield and quality of the casting members.