75 results about "Squeeze casting" patented technology

The invention relates to the technical field of extrusion casting, and discloses an aluminum alloy hub extrusion casting forming die which comprises a rack assembly, the rack assembly comprises a main rack, a barrel frame, a side pressing base, a lower die base and a fertilizer box, and the side face of the bottom of the main rack is fixedly connected with the side face of the barrel frame; the side face of the main machine frame is fixedly connected with the side face of the side pressing base, and the side face of the main machine frame is fixedly connected with the side face of the lower die base. According to the aluminum alloy hub extrusion casting device, a second hydraulic rod, a grabbing plate and a rotary disc assembly are arranged, after extrusion casting of an aluminum alloy hub is completed, products can be transported through the rotary disc assembly, automation of the device is achieved, and the labor cost and danger are reduced; high-temperature aluminum alloy liquid is pressed into the die through the pressure of the hydraulic rod, the high-temperature aluminum alloy liquid can be evenly distributed in the die, then redundant gas is exhausted through the gas outlet holes in the upper die, the problem that bubbles are generated in a machined product is solved, and the strength of the product can also be enhanced.

The invention relates to the technical field of extrusion casting molds, and discloses an automobile clutch shell extrusion casting mold which comprises a casting table base, a supporting column is fixedly connected to the top of the casting table base, a top hydraulic machine box is fixedly connected to the top of the supporting column, and a first hydraulic telescopic column is movably connected into the top hydraulic machine box in a sleeved mode. A mold base is arranged at the bottom of the first hydraulic telescopic column, the mold base is movably sleeved with an extrusion cooling table, a cold air conveying channel is formed in the bottom of the mold base, a first fan blade is movably sleeved with the mold base, and a first motor is fixedly connected to the bottom of the first fan blade; low temperature generated by cooling liquid is transmitted to the mold base to cool the mold base, the front ventilation pipeline arranged in the concave water tank in a sleeving mode converts internal airflow into low-temperature airflow through cooling liquid, and the water tank handrail is installed outside the concave water tank to prevent foreign matter from entering the concave water tank to affect the cooling effect of the front ventilation pipeline.

The invention discloses a large-size aluminum alloy bulkhead component extrusion casting device and a using method thereof, and relates to an aluminum alloy bulkhead component extrusion casting device and a using method thereof. The invention aims to solve the technical problems that the large-wall-thickness area becomes an isolated characteristic relative to a product main body due to the existing technology aiming at the shrinkage cavity defect of the large-wall-thickness area, the flowability of molten metal in the characteristic is poor, and the structural complexity of a component and a mold containing a plurality of large-wall-thickness areas is greatly improved. The multiple extrusion holes communicated with the mold cavity are formed in the movable mold plate and correspond to the positions where the shape follow-up extrusion inserts and the extrusion pins are located and the positions, needing local feeding, of the product with the large wall thickness, the local large-wall-thickness area is locally pressurized while overall loading of a product body is achieved, and the local large-wall-thickness area is pressurized; the whole and local parts of the product are fully fed, and the defects of shrinkage cavities, air holes and the like are remarkably reduced.

The invention discloses a squeeze casting preparation method of a high-toughness and high-plasticity aluminum-copper alloy, and relates to a squeeze casting preparation method of an aluminum alloy. The method aims to solve the technical problems that an existing aluminum alloy casting formed through extrusion casting is uneven in structure and not high in density, and strength and plasticity are difficult to synchronously improve. A proper amount of Zn element and Mg element are added into the aluminum-copper alloy, Mg and Cu are combined to generate an S-Al2CuMg phase, the thermal stability of the S-Al2CuMg phase is superior to that of a theta phase, dislocation movement can be hindered through dispersed distribution of the S phase, and meanwhile the fatigue life of the alloy is prolonged. According to the preparation method, the mass fraction ratio of Zn to Mg is properly reduced, so that the precipitation rate of the S phase is increased, the extrusion casting process is combined for forming, the T6 heat treatment process is carried out after forming, the alloy performance is further strengthened, the high-toughness and high-plasticity aluminum-copper alloy is prepared, and the tensile strength under the room temperature condition ranges from 400 MPa to 460 MPa.

The invention relates to the technical field of squeeze casting, in particular to a squeeze casting method for improving the precision of a thin-wall metal part. Comprising the following steps that S1, an aluminum alloy cast ingot is heated to 730-780 DEG C, and alloy liquid is obtained; s2, a mold is preheated, and the alloy liquid is poured into the mold; s3, the die-casting machine is started, and a punch enters the die to extrude the alloy liquid; and S4, a workpiece is obtained through pressure relief and demolding, solution treatment and aging treatment are conducted on the workpiece, and the thin-wall metal part is obtained. Through cooperation of heating of the induction coil and pressurization of the punch, the liquidity of alloy liquid can be guaranteed in the extrusion process so that sufficient feeding can be carried out, internal defects of the thin-wall metal part can be reduced, then grains of the thin-wall metal part are gradually improved and refined through extrusion pressure, the size of the thin-wall metal part is stabilized, and the yield of the thin-wall metal part is improved. And the precision of the thin-wall metal part is improved.

The invention provides an aluminum alloy suitable for extrusion casting and capable of being subjected to vacuum brazing casting, a preparation method of the aluminum alloy and a runner plate preparation method, and relates to the technical field of aluminum alloy casting. The aluminum alloy comprises the following chemical components in percentage by mass: 9-12% of La, 0.1-1.2% of Cu, 1-2% of Zn, 0.2-0.7% of Mg, 0.15-0.4% of Zr, less than or equal to 0.5% of Fe, less than or equal to 0.3% of Si and the balance of Al and inevitable impurities. According to the method, at least one of the technical problems that in the prior art, the heat crack tendency is large, the casting strength is low, and melting collapse is prone to occurring during brazing is solved, Cu is added on the basis of Al-La eutectic alloy to form a specific structure, continuous pressure applying is conducted in cooperation with extrusion casting so that the heat crack tendency can be reduced, and Cu and Zr cooperate to improve the strength of the cast after brazing; and meanwhile, brazing collapse is prevented by ensuring that the alloy solid-phase temperature exceeds 615 DEG C, Zn and Mg gasify and break an Al2O3 film formed on the surface of the aluminum alloy during vacuum brazing, newly exposed base metal is prevented from being oxidized any more, and the finally prepared runner plate is matched with an R744 refrigerant to meet the requirement.

The utility model discloses an extrusion casting machine adopting an electromagnetic pump for low-pressure mold filling. The extrusion casting machine comprises an electromagnetic pump mold filling system, a mold, a sealing and extrusion composite device, a mold locking device, a mold moving device, a guide column, a heat preserving furnace and a lifting mechanism, the lower die is connected with a static template, and the upper die is connected with a movable template; a piston rod of the mold moving device is connected with the movable template; the mold locking device and the sealing and extruding composite oil cylinder are mounted on the movable mold plate; the lower end of the guide pillar is fixed on the static template and penetrates through the center of the mold locking device; the heat preserving furnace is positioned below the static template; the electromagnetic pump mold filling system is fixed on the heat preserving furnace; the electromagnetic pump mold filling system is tightly connected with a lower mold of the mold through a liquid rising pipe; a sealing extrusion composite punch is mounted at the free end of an extrusion piston rod assembly of the sealing extrusion composite oil cylinder; a liquid inlet of the lower mold is communicated with a liquid outlet of the heat preservation furnace through a liquid rising pipe and an electromagnetic pump mold filling system in sequence; the heat preservation furnace comprises a soup adding chamber far away from the liquid outlet, and the soup adding chamber communicates with the liquid outlet through a communicating vessel.

A mandrel assembly (100) for net-shape casting of an undercut finocyl grain (133) with aft-end counterbore (140) in a solid propellant rocket case (101) comprising a core (105) capable of forming central cylindrical cavities in the grain and a plurality of fins (106) capable of forming a plurality of forward-swept longitudinal cavities circular patterned around the core. The method of assembling and disassembling the mandrel (100) comprises the acts of hanging the plurality of fins (106) from the core (105) using a fin hanger (107) with a plurality of long and flexible fin cables (108), hoisting the mandrel assembly (100) over the case aft-end aperture (104), bundling the fins (106) and lowering the mandrel assembly (100) inside the case (101), fastening of all the fins (106) to the core (105) and the core (105) to the case (101), inverting the total assembly, casting propellant slurry through case fore-end aperture (103), curing the propellant, inverting the total assembly back, removing core (105) first, assembling fin decoring tool (134) and removing fins (106) one by one, to obtain net-shape cast undercut finocyl grain (133) with aft-end counterbore (140) without employing squeeze casting or propellant machining.

The invention discloses extrusion casting equipment for aluminum magnesium alloy mold filling, and relates to the technical field of die casting equipment. The mold comprises a base, a supporting shell is installed at the top of the base, an adjusting shell is arranged in the supporting shell, one side of the adjusting shell communicates with a bottom mold, and a top mold is arranged on one side of the bottom mold; an adjusting assembly is arranged on one side of the base and comprises a feeding pipe communicating with one side of the adjusting shell. Through a first adjusting plug, a second adjusting plug and a liquid injection groove in the adjusting assembly, accurate control over the melt injection amount is achieved, a bottom mold and a top mold are preheated in advance through a preheating disc and a heater in the preheating assembly, and the problems that due to the low mold temperature, the melt surface layer is rapidly solidified, and cold shut and shrinkage are generated are effectively solved; an ejector pin, an adjusting plate and an adjusting shaft in the ejection assembly are matched with a rotating structure driven by a servo motor, automatic demolding is achieved, and the finished product quality of the aluminum magnesium alloy casting is improved.

The utility model discloses an extrusion casting die which comprises a fixed die core and a movable die core, the fixed die core and the movable die core are closed to form a pouring gate, a sub-runner and a casting cavity, a sliding block is arranged on one side of the fixed die core and one side of the movable die core in a sliding mode, a sliding block insert pin is fixedly arranged on the sliding block, and the sliding block insert pin extends into the casting cavity. The fixed mold core and the movable mold core are each provided with an alignment structure, a plurality of extrusion pins are inserted into the movable mold core, and the tail ends of the extrusion pins extend into the casting cavity; multi-cavity efficient production is achieved through shunting transverse typesetting, the casting quality and the demolding reliability are remarkably improved, the problems of air holes, shrinkage cavities, metal adhesion and the like in the prior art are solved, and high practicability and popularization value are achieved.

The application discloses an extrusion casting device for aluminum matrix composite material forming, which comprises a base, a conveying mechanism for conveying molten aluminum is installed outside the base, a smelting furnace mechanism for smelting aluminum matrix composite material raw materials is arranged outside the base, a mold mechanism is arranged outside the connecting plate, and a pneumatic mechanism is installed outside the base; through cooperation of an air extraction pump, a connecting valve, an air inlet groove and other components, preheating, impurity cleaning, casting pushing out and cooling of the mold are achieved; the smelting furnace hot gas is discharged into a gas storage bag and then into the air inlet groove by starting the air extraction pump, the push rod is pushed out to preheat the mold and blow out impurities; after the mold is closed, the vacuum pump is used to extract air to form a vacuum environment, which is beneficial to molten aluminum filling and bubble discharging; after the casting is completed, the hot gas is discharged to push the push rod to push out the casting and cool it, so that the casting thermal stress and the mold thermal fatigue are slowed down, and the mold service performance and the casting quality are improved.

According to the technology, performance breakthrough is achieved through gradient reinforced aluminum-based composite material preparation, extrusion casting near-net forming and hypersonic flame spraying coating strengthening cooperation, specifically, 6061 aluminum alloy serves as a base body, 15% of SiC particles are doped in the core part to guarantee the strength, and 8% of nano Al2O3 is added to the surface layer to improve the hardness of a friction area; after extrusion casting and T6 heat treatment, the working face of the cam is sequentially subjected to sand blasting coarsening and anodic oxidation, then a WC-CoCr coating is sprayed through HVOF, laser remelting is conducted, and finally precision machining is conducted till the lift error is smaller than or equal to 0.005 mm. Compared with cast iron, the weight of a finished product is reduced by more than or equal to 33%, the coating hardness HV is 1200-1500, the wear rate is reduced, the fatigue life is prolonged, and the product is suitable for engines of passenger vehicles and commercial vehicles and good in mass production.

This utility model relates to the field of wheel hub casting, and more particularly to an aluminum-steel wheel hub extrusion casting mold with thermal fatigue resistance. This utility model provides an aluminum-steel wheel hub extrusion casting mold with thermal fatigue resistance, including a bracket, electric push rods, side molds, a cylinder, an upper mold, a lower mold, and an air outlet pipe. Electric push rods are installed on both sides of the bracket, and side molds are connected to the adjacent sides of the two electric push rods. A cylinder is installed on the top of the bracket, and the upper mold is connected to the output shaft of the cylinder. After the two side molds are fitted together, the upper mold and the lower mold can be completely fitted together. Fixing blocks are installed on both the front and rear sides of each side mold, and air outlet pipes are installed on the fixing blocks. The beneficial effects of this utility model are: 1. By setting up air outlet pipes, the continuous output of cold air from the air outlet pipes will cause the temperature of the two side molds to drop evenly. After the temperature stabilizes, the cast wheel hub will not crack, and the production efficiency will also be improved.

The invention discloses a preparation method of a squeeze-cast nano VC composite wear-resistant hob cutter ring, and belongs to the technical field of composite hob cutter rings. According to the method, alloy raw materials are weighed according to alloy components and put into an electric frequency induction furnace to be smelted, and then extrusion casting is conducted; the sample obtained after extrusion casting is pretreated, and then the sample is machined into a hob casting; the hob casting is subjected to heat treatment and subzero treatment; the problems that according to a traditional forging method, the number of forging heating times is large, procedures after forming are complicated, and the production efficiency is affected are solved; rapid cooling conditions provided by extrusion casting can inhibit precipitation of primary VC and provide necessary conditions for subsequent precipitation of nano VC; the material structure can be homogenized and refined through cold treatment, nano VC separated out through subsequent tempering can be further refined, the cyclic load can be resisted through the more uniform structure and smaller stress concentration, and therefore the wear resistance of the material is improved.

The invention relates to a homogenizing composite pouring method of a high-beryllium aluminum alloy, which adopts a beryllium-based alloy as a main material, and through a double-flow smelting process, the main material is smelted in a flow A, and auxiliary materials such as an aluminum ingot and a Y-TiC-TiB2 / Al composite modifier are smelted in a flow B, so that the cooperation of interface modification and grain refinement is realized. And then, the A-flow melt and the B-flow melt are synchronously and compositely poured into a preheated casting mold according to the proportion, rapid solidification is achieved through extrusion casting, and finally hot isostatic pressing treatment is conducted. According to the method, beryllium-aluminum segregation, beryllium phase sedimentation and formation of microdefects are effectively inhibited, and the prepared beryllium-aluminum alloy is uniform in component, compact in structure, excellent in mechanical property and wider in application range.

The application relates to the field of aluminum alloy materials, and provides a manufacturing method of a high-strength thin-wall aluminum alloy extrusion casting part, and aims to solve the problems of insufficient strength and large heat treatment deformation of the existing aluminum alloy extrusion casting part. The method adopts an Al-Si-Mg-Cu-Zn series casting alloy with a specific component proportion, and through steps of an optimized extrusion casting process, solid solution treatment, precooling treatment and isothermal quenching, an organizational structure containing 1.0-3.5 vol% Al5Mg8Si6Cu2 strengthening phase is formed, the strengthening phase forms a semi-coherent interface with a matrix during precipitation, and the mechanical properties of the casting are effectively improved. The casting prepared by the application has a tensile strength of greater than or equal to 368 MPa, a yield strength of greater than or equal to 316 MPa, and a flatness deviation of 0.1-0.25 mm / 100 mm, is suitable for manufacturing thin-wall structural parts with high requirements for high strength and high dimensional accuracy, and has a wide engineering application prospect.

The application discloses a composite core which can be used for extrusion casting and pressure casting, and is composed of an inner core and a sand core layer, and can be used for extrusion casting and pressure casting, and can make the core free from preheating, and the sand core layer can be easily collapsed, so that the core can be easily taken out after the casting is completed.

The invention discloses a direct extrusion casting device without a force bearing framework, which comprises a rack, a lower die, an upper die and an upper die lifting device, an impact pickaxe is arranged on the upper die, the upper die lifting device ascends to pour molten metal, the upper die lifting device descends, the upper die and the lower die are closed, the impact pickaxe impacts the upper die, impact force is transmitted to the molten metal through the upper die, and the molten metal is extruded through the impact pickaxe. A workpiece push-out rod and a push-out rod pushing mechanism are further arranged on the upper die or the lower die, the upper die or the lower die is impacted by an impact pickaxe or vibrated by a vibration device, and impact force and vibration force are transmitted to liquid and semi-liquid metal through the upper die or the lower die, so that the molten metal is in tight contact with the die in the solidification process and can be fed in time, and the molten metal is solidified. And meanwhile, the casting device is simple in structure, and extrusion casting of large-size metal castings is easy to achieve.

This invention relates to the field of hypereutectic aluminum-silicon alloy material preparation technology, and in particular to a method for preparing hypereutectic aluminum-silicon alloy materials by extrusion casting. The preparation method includes the following steps: melting ZL109 aluminum alloy, adding Al-30Si master alloy, heating to 820-850℃ and holding for 15-20 minutes; then adding a refining agent for refining; cooling to 750-770℃, adding a refining agent, and holding at this temperature; and finally casting into a mold for extrusion casting to obtain the hypereutectic aluminum-silicon alloy material. This invention simplifies the melting process, obtains a uniform hypereutectic aluminum-silicon alloy microstructure, significantly refines the grain size and primary silicon size, and improves the mechanical properties of the hypereutectic aluminum-silicon alloy material.

The utility model provides a new energy electric vehicle drive casing mould cavity relates to new energy electric vehicle drive casing's casting mould technical field, including mould main part, the top of mould main part is equipped with two split gates, the inside of mould main part is equipped with the cavity main part in one side of two split gates, the both sides of the cavity main part in mould main part are equipped with overflow groove, the one side of the cavity main part in mould main part is equipped with exhaust system. The improvement of traditional extrusion casting mould one mould one cavity, adopt the design of many split gates, compared with the advantage of single internal flow channel is to make molten metal as possible more uniform delivery to each gate, the liquid that flows into the metal cavity is as possible big, flows smoothly. Under the condition of satisfying the forming requirement of casting, improve the productivity, adopt the design of tubular inner gate fully consider the shape characteristics and forming capacity factors of the part, thereby obtain high performance, high quality casting.

The utility model discloses a composite core capable of being used for squeeze casting and pressure casting, which is formed by combining an inner core and a sand core layer and is used for squeeze casting and pressure casting, so that the core does not need to be preheated, and the sand core layer is easy to scatter, so that the cast core is easy to take out.

The present application relates to a kind of high Fe tolerance aluminum alloy for squeeze casting and its preparation method, belong to aluminum alloy pressure casting technical field, solve the low Fe content tolerance in prior art in the production of aluminum alloy, the low proportion of recycled aluminum use, the problem of not high high-toughness performance of aluminum alloy product, heat treatment process is complex, long cycle.A kind of high Fe tolerance aluminum alloy for squeeze casting, alloy content is as follows according to percentage by mass:Si:2-4%, Mg:1-2%, Fe:0.5-1.0%, microalloying element:0.01-1.5%, the balance is Al;The microalloying element is one or more mixtures of Sr, Cr, Mn and Zr.It realizes high-toughness green low-energy consumption casting of aluminum alloy.

The invention discloses an aluminum alloy motor shell and a manufacturing method of the motor shell, and relates to the technical field of motor production, the aluminum alloy motor shell comprises a shell, motor mounting holes are formed in the upper side and the lower side of the shell, three corresponding reinforcing frames are arranged in the shell wall of the shell, and four corresponding reinforcing ribs are arranged at the four corners of the shell; the invention discloses a manufacturing method of an aluminum alloy motor shell. The manufacturing method comprises the following steps: S1, raw material pretreatment; s2, smelting and refining; s3, die setting and vacuum extrusion casting; s4, casting initial inspection; s5, heat treatment; s6, finish machining; s7, finished product detection, by optimizing the internal structure design of the shell, uniform stress distribution can be achieved, stress concentration of a key area is reduced, meanwhile, the compactness and consistency of materials are improved through overall process control, surface treatment is enhanced to improve corrosion resistance and heat dissipation performance, and therefore the structural reliability and adaptability of the shell are remarkably improved.

The invention discloses an aluminum alloy for squeeze casting and a preparation method and application thereof.The aluminum alloy for squeeze casting comprises Mn, Ca, Ce, La, Si, Fe, Ti, Mg and other components, the content of the components is controlled, the organization structure is improved, a unique high-melting-point second phase combination is formed in the alloy organization structure, the proper number and area proportion is achieved, and the alloy can be used for manufacturing a high-strength aluminum alloy. A three-dimensional continuous network structure is formed, the properties of strengthening, high-temperature stability and the like of the aluminum alloy are effectively achieved, all the components are coordinated and complementary, the aluminum alloy is suitable for machining in the extrusion casting technology, the hot crack tendency can be reduced, effective feeding is achieved, shrinkage porosity and shrinkage cavities are avoided, and the structure compactness is improved; during preparation, all the components are mixed, melted and refined to obtain an aluminum alloy melt, and the aluminum alloy melt is cooled. According to the aluminum alloy system, nickel is not added, the material cost is low, meanwhile, the aluminum alloy system can be suitable for extrusion casting, high-density castings can be obtained easily, and the performance of braze welding, high strength and the like is achieved.

This invention discloses an extrusion casting device for aluminum alloy motor housings, relating to the field of parts casting technology. A first feeding mechanism and a second feeding mechanism are provided on a base. A circular frame is rotatably mounted on the base, and a feeding area is provided on the circular frame. A third feeding port moves to communicate with the outlet ends of the first and second feeding mechanisms. A casting mechanism is provided on the base, and a second electric cylinder is provided on the base to push the aluminum alloy column in the feeding area into the casting mechanism. An extrusion rod is provided on the base to continuously extrude the aluminum alloy column in the casting mechanism to form the aluminum alloy motor housing. In this invention, the lower mold housing drives the aluminum alloy column to move into the channel formed by the upper and lower mold housings. The aluminum alloy column sequentially passes through the extrusion profile hole of the upper mold, multiple diversion holes of the diversion bridge, and the space between the mold core and the extrusion profile hole to continuously discharge, forming the aluminum alloy motor housing. This can improve the forming quality and yield of the housing castings.

The invention discloses a high-toughness and high-corrosion-resistance extrusion casting aluminum alloy material which comprises the following components in percentage by weight: 6%-10% of Si, 0.4%-0.6% of Mg, 0.8%-1.4% of Cu, 0.08%-0.15% of Fe, 0.04%-0.12% of Ti, 0.015%-0.030% of Sr, 0.02%-0.15% of Cr, 0.02%-0.09% of Zr, less than or equal to 0.1% of impurities and the balance of Al, and the weight ratio of Ti to Zr is Ti + Zr < lt >. 0.18%, 0.1% lt; cr + Zr [lt]; and 0.2%. According to the aluminum alloy material, the strength and toughness are improved by reasonably proportioning Cu and Mg elements, the structure compactness is optimized by combining an extrusion casting process, an oxidation film is thickened by accurately adding low-content Cr and Zr elements, the strength and the corrosion resistance are synergistically improved, the blank in the aspect of optimizing the comprehensive performance of AlSiMg alloy in the prior art is filled up, and the aluminum alloy material is suitable for being used in the field of aluminum alloy production. And the harsh requirements on materials in the high-end manufacturing field are met.

This invention discloses a casting mechanism and an equipment and method for extruding magnesium alloy castings, belonging to the field of casting technology. The casting mechanism includes a base and further includes: a mold section, comprising a fixed mold base fixedly mounted on the base and a movable mold base slidably connected to the base; both the fixed and movable mold bases have cavities, which together form a die-casting cavity; a hydraulic cylinder, fixedly mounted on the base via a first connecting plate, with its piston rod connected to the movable mold base; and a transfer mechanism, connected to the movable mold base, for transferring the castings within the cavity of the movable mold base. This invention achieves automatic material handling through a linkage mechanical structure, significantly reducing equipment costs compared to dedicated robotic arms. It solves the problems of high cost, low efficiency, and high error rate associated with existing robotic arm material handling systems, making it suitable for small- to medium-scale magnesium alloy die-casting production scenarios.

The invention discloses a squeeze casting forming device of a high-strength heat-resistant aluminum-silicon eutectic alloy piston and a using method of the squeeze casting forming device, and relates to a squeeze casting forming device of aluminum-silicon eutectic alloy and a using method of the squeeze casting forming device. The invention aims to solve the technical problems that the existing high-strength heat-resistant eutectic aluminum alloy large-size and large-wall-thickness-difference thin-wall piston is difficult to fill and difficult to demould during precision forming. The side wall and the bottom of the female die do not have pattern draft, molten aluminum splashing caused by the fact that the lower portion is large and the upper portion is small in the extrusion casting process is prevented, and a piston forming part can be completely demolded by spraying a large amount of aquadag on the female die. The side wall of the cavity is matched with the first working part of the male die, and the maximum gap is 0.03 mm, so that smooth filling and pressure maintaining in the extrusion casting forming process can be guaranteed. High-precision forming of the aluminum-silicon eutectic alloy piston with the large size and the large wall thickness difference is achieved, and the formed piston piece is prevented from being locked on the punch of the male die through different draft angles and lubricating strategies of the male die.

The hub extrusion casting device is provided with a casting mechanism, when the hub extrusion casting device is used, after raw materials are placed in a lower die above the surface of a fourth gear, a hydraulic rod drives an upper die to descend and enter the lower die for extrusion forming at the moment, and meanwhile after extrusion forming, the casting mechanism is used for casting the hub. The hub subjected to extrusion forming is rapidly cooled through the cooling mechanism, after the hub is cooled and formed, the hydraulic rod is started again to drive the upper mold to ascend, the rotating mechanism drives the rotating disc to rotate, and meanwhile, the fixing shaft synchronously rotates, so that the fixing shaft slides in a groove in the surface of the rotating block and then drives the rotating block to rotate; meanwhile, a first rotating rod drives a third gear to rotate, so that the surface of a fourth gear rotates in the machine body through a supporting rod at the bottom, a new lower mold at the upper end of the fourth gear is moved to the position above the upper mold, the lower mold is moved more accurately in cooperation with a rotating disc rotating block, and shifting of the moving position of the lower mold is prevented; and the extrusion hub is deviated.

This invention discloses a green and energy-saving extrusion casting method and apparatus that combines liquid phase retention and forced feeding sequential solidification. The method includes the following steps: melting a pre-proportioned metal to obtain a basic alloy melt; degassing and refining followed by the addition of an intermediate alloy to obtain an intermediate alloy melt; lowering the temperature to obtain a finished alloy melt; during casting, adjusting the ingate temperature between the solid and liquid phases of the finished alloy melt; and activating a multi-point positioning cooling device to locally force-cool areas with large wall thicknesses. This invention, by precisely controlling the ingate temperature between the solid and liquid phases of the alloy melt, ensures that the alloy melt at the ingate is in a solid-liquid mixed state during pressure holding solidification. The liquid alloy melt can smoothly pass through the gap between the primary solid phases and flow into the shrinkage cavities of the casting body during pressure holding solidification, achieving further forced feeding of the liquid during the pressure holding process of alloy melt extrusion casting. This results in high-quality castings with high microstructure density, few shrinkage cavities and porosity defects, and excellent strength and elongation.