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2013 results about "Pressure casting" patented technology

Low-pressure casting process and device for aluminum alloy wheel by bilateral pouring

ActiveCN101837443AHigh densityNo shrinkage defectsPressure castingMechanical property
The invention discloses a low-pressure casting process for an aluminum alloy wheel and a low-pressure casting device required for realizing the process. In the casting process, a casting manner of bilateral pouring is adopted; a pouring gate is formed on two sides of the wheel to allow aluminum liquid to enter from the wheel rim; and through the control of cooling, the aluminum liquid is crystallized from the wheel core to the wheel rim at a rapidly-cooled module temperature. The low-pressure casting device comprises a bilaterally-pouring module which is arranged on a machine bed platform below which a furnace cover of a low-pressure heat preserving furnace is arranged; and the furnace cover is arranged on the heat preserving furnace body which is connected with the bilaterally-pouring module through a liquid lifting pipe. In the process, as the bilaterally-pouring process is adopted for casting and symmetrical pouring gates are formed on two sides of the wheel, the aluminum liquid symmetrically enters from the two sides of the wheel rim to ensure a high casting composition consistency and a good mechanical property; in addition, the entire casting device has the advantages of simple device, identical process with that of the general low-pressure central casting, simple entire process and easy operation.
Owner:BAODING CITY LIZHONG WHEEL MFG

Road vehicle brake disc made of carborundum foamed ceramics/aluminum alloy composite materials and production method of road vehicle brake disc

The invention discloses a road vehicle brake disc made of carborundum foamed ceramics/aluminum alloy composite materials and a production method of the road vehicle brake disc. The body of the reinforced-aluminum-alloy brake disc with a carborundum foamed ceramics framework is made of reinforced aluminum alloy materials such as aluminum alloy or nano ceramics particles or carbon nano-tubes. The carborundum foamed ceramics framework is integrally casted on two symmetrical friction surfaces of the brake disc, and heat dissipation grooves or air holes can be casted or do not need to be casted on the friction surfaces. A plurality of heat dissipation ribs are casted in the peripheral direction of non-friction surfaces. Mounting holes are formed in the disc body. The production method includes the steps of production of the carborundum foamed ceramics framework, preprocessing of the framework, design and production of a casting mold of the brake disc, lower-pressure casting of the brake disc, heat treatment of the brake disc, precision processing of the brake disc and storage of a finished product. The brake disc is simple in production technology, light in weight, high and stable in friction factor, high in heat conductivity, long in service life and applicable to existing road vehicles.
Owner:SHIJIAZHUANG DONGDA HUITONG NEW MATERIAL CO LTD

Low pressure multiple-core casting technique of engine V6 aluminum cylinder

The invention discloses a low-pressure core assembly casting technique for V6 aluminum cylinder-block of engines, which is used for casting V6 aluminum cylinder-block of automobile engines. The casting technique adopted combines a low-pressure casting method and a core assembly method; the three-dimensional modeling of products is firstly carried out; according to the shape of the cast product, a crankcase is determined to be downwards and the aluminum liquid is let in from the baffle of the crankcase during casting course; the position of the sprue is selected and the size of the sprue is determined; a casting simulation software is adopted to carry out a simulation casting, the defects that are possible to occur are analyzed and a technical design scheme is made according to the analytic result, which essentially comprises the steps of : 1) making cores; 2) combining sand cores into a sand core group (6); 3) casting under low pressure. The casting technique of the invention can adopt flexible core assembly modes according to different shapes of engine blocks to produce aluminum cylinder-block cast products which are complex and of fine quality and has thin wall, meanwhile, the casting technique is applicable to the mass production with automatic production lines, thus having the advantages of low cost, high efficiency and high qualification rate.
Owner:NINGBO HELI TECH CO LTD

Degradable open porous magnesium and magnesium alloy biomaterial and preparation method thereof

ActiveCN104232972ANo residueUniform distribution throughoutProsthesisPorosityPressure casting
The invention discloses a degradable open porous magnesium and magnesium alloy biomaterial and a preparation method thereof. The magnesium and magnesium alloy biomaterial is in a completely open structure, the hole shape and size are controllable, holes are communicated by virtue of communicating holes, and the number and size of the communicating holes in hole walls are controllable; the holes are uniformly distributed and the porosity is adjustable. The preparation method comprises the following steps: sintering sodium chloride crystal particles to obtain an open porous sodium chloride prefabricated structure; pouring molten magnesium or magnesium alloy into a mould cavity with a sodium chloride prefabricated body, and performing seepage pressure casting; and removing magnesium or magnesium alloy block outer skin with the sodium chloride prefabricated body, washing with alkali, and filtering to remove sodium chloride to obtain the degradable open porous magnesium and magnesium alloy biomaterial. The preparation process is simple, convenient to perform and pollution-free; the prepared open porous structure is provided with the communicated and uniformly distributed holes, is controllable in hole shape and size, relatively high in porosity and strength, free of pore former residues and pore closing phenomenon and adjustable in degradation rate, and can serve as a new-generation degradable bone tissue engineering scaffold.
Owner:SHANGHAI INNOVATON MEDICAL TECH CO LTD

Vacuum low-pressure casting forming device for titanium alloy component

InactiveCN104028729AImprove feeding capacitySuppresses the tendency to segregate chemical componentsActuatorPressure difference
The invention provides a vacuum low-pressure casting forming device for a titanium alloy component. The vacuum low-pressure casting forming device for the titanium alloy component comprises a device body, a vacuum low-pressure casting pneumatic control system and an electronic control system. An upper chamber and lower chamber type structure is adopted by the device body, a water-cooled copper crucible is arranged in a lower chamber, a casting mold is arranged in an upper chamber, an intermediate separation plate is arranged between the upper chamber and the lower chamber, and a liquid lifting pipe is arranged on the intermediate separation plate. The vacuum low-pressure casting pneumatic control system is connected with the device body, a vacuum system and a protective gas source system, and digital combination valves are adopted as flow regulation actuators. The electronic control system is composed of an industrial control computer and a PLC. After the smelting process of titanium alloy is completed in a smelting chamber, the water-cooled copper crucible is lifted to a casting position through a lifting device, an upper chamber and lower chamber intercommunication valve is closed, the flow of protective gas fed into the lower chamber is controlled through the computer, the pressure difference between the upper chamber and the lower chamber is established, the liquid alloy is filled in the casting mold through the liquid lifting pipe under the action of the pressure difference, and the casting process is completed. Compared with traditional centrifugal casting and bottom leakage type suction casting, the mold-filling capacity and solidification feeding capacity of the titanium alloy can be improved, castings with better casting quality and thinner wall thicknesses can be obtained, and a new means is provided for batch production of minitype titanium alloy components.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Multi-robot collaborative polishing device and method for pressure casting

ActiveCN106425790AOrderly and efficient grinding workCompact grinding processGrinding machinesGrinding feedersProduction linePressure casting
The invention discloses a multi-robot collaborative polishing device and method for a pressure casting. The polishing device comprises an installation platform, a polishing platform arranged on the installation platform, polishing mechanical arms located on the two sides of the polishing platform, and an automatic feeding and discharging mechanical arm located above the polishing platform. The automatic feeding and discharging mechanical arm is used for moving the pressure casting onto the polishing platform. A first clamp and a second clamp which are arranged side by side are fixed to the polishing platform and are used for clamping the pressure casting. The end portion of each polishing mechanical arm is provided with a polishing tool. The polishing tools on the two sides are used for simultaneously polishing the opposite two sides of the pressure casting clamped by the first clamp or the second clamp. The two polishing mechanical arms collaboratively polish the pressure casting on the two sides of the workpiece so that the polishing work can be conducted in order and efficiently, the working space capable of being reached by the mechanical arms is fully utilized, the polishing efficiency is obviously improved, and due to the automatic feeding and discharging mechanical arm, the above polishing device and method are more suitable for automatic production line flow production.
Owner:GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI +1

Method and device for preparing semi-solid state slurry through intensive cooling stirring

The invention discloses a method for preparing semi-solid state slurry through intensive cooling stirring. The method comprises the following steps: placing overheated alloy melt in a crucible or a casting ladle, descending a rotary stirring shaft internally introduced with a circular cooling medium in the alloy melt through a lifting device, driving the convection heat exchange of the alloy melt through stirring, continuously cooling the rotary stirring shaft through the circular cooling medium, stirring for a fixed period of time or cooling the melt to a set temperature, raising the rotary stirring shaft to prepare the semi-solid state slurry and form an ingot casting; closing the casting ladle containing the semi-solid state slurry to formation equipment and pouring the semi-solid state slurry into a cavity or material chamber of the formation equipment to take the shape; and taking out a formed part and moving the crucible or the casting ladle back to an original position and filling the overheated alloy melt to perform the next semi-solid state slurry preparation. The invention further provides a device for realizing the above method. Through the adoption of the method and device provided by the invention, large volume of semi-solid state slurry can be prepared once, and the semi-solid state slurry can be continuously produced in batch, and then the rheolytic formed part can be prepared through the combination of pressure casting, rolling, die-forging and other conventional formation equipment.
Owner:SHANGHAI INST OF TECH

Process for smelting and lower-pressure casting of aluminum alloy wheel hub

The invention discloses a process for the smelting and low-pressure casting of an aluminum alloy wheel hub, which comprises: 1, putting an aluminum alloy smelting material into a smelting furnace for smelting, and when the temperature in the smelting furnace reaches 740 to 760 DEG C, introducing nitrogen into the smelting furnace to blow a refining agent into the body of the furnace for refining;2, transferring the molten aluminum alloy to a tundish from the liquid outlet of the smelting furnace, adding an Al-Sr intermediate alloy, mischmetal (Re) and an Al-Zr intermediate alloy into the tundish to perform modification and refinement treatment under a condition of a temperature of 710 to 730 DEG C, and blowing nitrogen to the tundish to perform secondary degassing of the molten aluminum alloy; 3, transferring the molten aluminum alloy in the tundish to a casting holding furnace, adding a slag decomposing agent into the holding furnace to remove slag and blowing nitrogen into the holding furnace to perform tertiary degassing; and 4, pressing the molten aluminum alloy into a mold by a method of prepressing, pressure stabilizing, pressurizing and pressure keeping to perform casting.The process can effectively discharge slag and degas, has excellent modification and refinement effects and contributes to improvement in product quality.
Owner:ZHEJIANG ZENT AUTO WHEEL

Manufacturing method of mobile phone middle frame

The invention discloses a manufacturing method of a mobile phone middle frame. The manufacturing method comprises the following steps: S1, preparing a stainless steel rim; S2, putting the stainless steel rim into a pressure casting die, then adding smelted aluminum alloy liquid into the pressure casting die for pressure casting to form an aluminum alloy middle plate, and integrally forming an aluminum alloy-stainless steel middle frame from the aluminum alloy middle plate and the stainless steel rim; S3, covering the aluminum alloy middle plate with protective rubber capable of resisting corrosion of acidic liquid and alkaline liquid, putting the aluminum alloy-stainless steel middle frame into microhole treatment liquid for corrosion to form micro holes, and then removing the protective rubber; S4, forming a plastic structural member on the aluminum alloy-stainless steel middle frame through injection molding; and S5, performing post machining treatment on the aluminum alloy middle frame. The manufacturing method can avoid the problem that only the aluminum alloy is corroded, but the stainless steel cannot be corroded due to different activities of metals in the manufacturing process. According to the method, the machining amount of the whole structure of the middle frame can be reduced, the appearance effect is good, and the yield is high.
Owner:GUANGDONG JANUS SMART GRP CO LTD

Preparing method of interface modification layer of ceramic particle enhanced metal base composite material

The invention discloses a preparing method of an interface modification layer of a ceramic particle enhanced metal base composite material, and belongs to the technical field of a metal base composite material. The method comprises the following steps that ceramic particles and modification element particles are uniformly mixed according to a certain proportion, are pressed into a prefabricated body and are sintered, then, the sintered prefabricated body is placed into a casting die cavity, a metal substrate with the melting point lower than the melting point of the modification elements is cast on the sintered prefabricated body, next, the metal base composite material is prepared by adopting a pressure casting method, the melting point of the modification elements is a little higher than the melting point of molten liquid, so the modification elements are in a molten state when the molten liquid is cast into the die cavity, then, the modification elements move together with the molten liquid under the pressure effect, when meeting the blocking effect of the ceramic particles, the modification elements and the molten metal can go around the surface of the ceramic particles for forming a micrometer level interface modification layer on the surfaces of the ceramic particles, and the bonding intensity of the ceramic particles and the metal interfaces can be improved. When the method provided by the invention is adopted, great significance can be realized on the preparation of high-performance and low-cost metal base composite material.
Owner:KUNMING UNIV OF SCI & TECH

Low-pressure casting method for automobile motor casing and motor casing structure

The invention discloses a low-pressure casting method for an automobile motor casing. The low-pressure casting method for the automobile motor casing includes the following steps that (1) a sand core structure of a spiral water channel is manufactured; (2) the sand core structure is placed on a lower mold body of a die-casting mold; (3) the automobile motor casing with the sand core structure of the spiral water channel is cast through a low-pressure casting device; (4) heat treatment is conducted on the automobile motor casing, then sand is vibrated out, and the automobile motor casing is provided with the complete spiral water channel; and (5) holes formed in the original sand core structure portion of the sidewall of the automobile motor casing are filled up through welding, so that the complete automobile motor casing with the spiral water channel is formed. The invention further discloses a motor casing structure. Through the low-pressure casting method for the automobile motor casing, the aluminum alloy low-pressure casting process is adopted and the spiral water channel is cast through the sand core of the spiral water channel, so that the cooling effect on a motor is guaranteed, the service life of the motor is greatly prolonged, the requirement for long-time working of an automobile can be met, and the weight of the whole motor is reduced by about 60%.
Owner:HUIZHOU WEISHENG IND

Composite material hammerhead of crusher and negative pressure casting method thereof

InactiveCN101530904AWith double shadow anti-wear effectNo wearGrain treatmentsCrusherVacuum pump
The invention discloses a composite material hammerhead of a crusher and a negative pressure casting method thereof. The negative pressure casting method comprises that: firstly, a metal parent material is subjected to electric smelting to form molten metal; WC particles and a bonding agent are mixed and prepared into paste, the paste is filled in a columnar metal screen which is then baked in a sealed mode to form a prefabricated body, and the prefabricated body is placed on the end face side of a mould cavity; a vacuum pump is started 5 minutes earlier than the tapping of the molten metal, and then the molten metal is tapped off for casting; and the vacuum pump is switched off after 4 minutes of the casting completion. The composite material hammerhead hammer body obtained by the preparation method is made of high manganese steel, alloy steel or common carbon steel; a hammer end, namely a working face or a striking face consists of a metal matrix and columnar reinforcers uniformly distributed in the metal matrix, wherein the columnar reinforcers are made of a composite material formed through infiltration of a ceramic particle prefabricated body and mother liquor metal, and have the hardness of HRC55-67 and excellent impact abrasion resistance; and the interface of the columnar reinforcers and the metal matrix, and the interface of the WC particles in the reinforcers and a substrate have good metallurgical bonding and high bonding strength.
Owner:XI AN JIAOTONG UNIV

Plaster casting method for large-sized complex thin-walled magnesium alloy part

The invention relates to a plaster casting method for a large-sized complex thin-walled magnesium alloy part. The method comprises the following steps of coating the surface of an assembled form with a coating in situ, and arranging shapeless cold iron on a hot spot part, wherein a mixture for manufacturing the shapeless cold iron comprises the following components in percentage by mass: 1.25 percent of phenolic resin, 0.4 percent of toluenesulfonic acid, 1 to 1.5 percent of boric acid, 2 percent of bentonite and the balance of 70 to 140-mesh chromite sand; pouring a casting in an adjustable pressure casting device, arranging a plaster mold poured by the form at the casting position of the adjustable pressure casting device, filling a tank with dry air or a CO2 atmosphere with SF6 content of 0.1 to 1.0 percent, and performing vacuum casting and pressurized solidification, wherein the casting temperature is 710 to 750 DEG C, vacuum degree for primary mold filling is minus 0.6Mpa to minus 0.8Mpa, and the solidification pressure is 0.020 to 0.025Mpa. According to the method, oxidization can be prevented, the mold filling capability can be improved, shrinkage cavities and shrinkage porosities in the casting are reduced, and the obtained magnesium alloy casting is higher in density.
Owner:山西银光华盛镁业股份有限公司
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