5048results about "Foundry moulds" patented technology

The invention relates to the technical field of alloy pouring processes, in particular to a magnesium alloy heterogeneous flow overall coordination pouring process which comprises the steps of conducting pouring numerical simulation through simulation software, optimizing pouring design and determining a composite flow guide structure, a mold temperature control scheme and an alloy component regulation and control strategy. Magnesium alloy smelting and refining are conducted; preheating the mold by using an intelligent temperature control system; during the period, the intelligent temperature control system monitors and adjusts the temperature of the mold, and the online alloy adding system and the impurity adsorption filtering device keep the components of the melt uniform and pure; and after pouring is completed, controlling the mold temperature according to a preset cooling curve to slowly and uniformly solidify the melt. The design of the bionic branch-shaped flow dividing structure, the dynamic adjustable flow guide plate and the like reduces casting defects, and the casting forming quality is improved. And on-line alloy adding and impurity adsorption filtering ensure that melt components are stable, and the casting performance is improved.

The utility model relates to the technical field of mold shell pouring equipment, in particular to a precision casting mold shell vacuum pouring device which comprises a pouring seat, a bottom plate is arranged at the bottom of the pouring seat, a vibration mechanism is arranged between the bottom plate and the pouring seat, and a fixing column, a sealing groove and a mold groove are arranged at the top of the pouring seat. A top plate is fixedly mounted at the top end of each fixing column, a movable plate is arranged on the outer side of each fixing column in an attached and sleeving mode, an upper mold plate and an annular protruding block are fixedly mounted at the bottom of each movable plate, a pressure suction pipe is arranged at the top of each movable plate in a sealed and penetrating mode, and a sealing pressure spring is fixedly mounted on the inner wall of the bottom end of each sealing groove; according to the vacuum pouring device for the precision casting mold shell, by means of the structural design in the vibration mechanism, flowing and distribution of a mixture in the pouring process are facilitated, formation of air holes and shrinkage cavities in the mold shell is reduced, and the density and the surface quality of a casting are improved.

The invention discloses a casting production device of a corrosion-resistant cast iron cylinder sleeve, and relates to the technical field of cylinder sleeve casting, the casting production device comprises a bottom frame, a bottom shell is fixed on the top surface of the bottom frame, two sliding grooves are formed in the top surface of the bottom shell, the cylinders are fixed on four edges of the top surface of the bottom frame, and the top shell is fixed on the top of the outer wall of the cylinders. An electric hydraulic rod penetrates through and is fixed to the middle of the top face of the top shell, a sliding shell is fixed to the bottom face of the telescopic end of the electric hydraulic rod, the inner wall of the sliding shell is slidably connected with the outer wall of a cylinder, a round mold is arranged in the middle of the bottom face of the sliding shell, a sand mold block and a U-shaped frame are placed in the middle of the top face of the top shell, and the U-shaped frame is fixed to the bottom end in the bottom shell. The sand mold block is clamped and positioned through the two U-shaped frame plates, so that the problem that the casting effect of the corrosion-resistant cast iron cylinder sleeve is poor due to the fact that the sand mold block deviates on the table top is solved.

The invention belongs to the technical field of motor casing lost foam casting, and particularly relates to a special coating for a motor casing lost foam as well as a preparation method and application thereof. Through a quantitative formula design method, an aggregate proportion calculation formula based on thermal expansion coefficient matching and a grain size distribution correlation formula based on target air permeability, cooperative compounding of quartz powder and bauxite is achieved, and key functional components such as mullite, organic matter fibers and crystalline flake graphite are combined; the unification of high air permeability and excellent crack resistance of the motor shell lost foam coating is realized. The invention further provides a two-time coating gradient drying efficient process matched with the coating, and on the premise that the coating performance is guaranteed, the production efficiency is remarkably improved, and the energy consumption is reduced.

The invention relates to the technical field of part manufacturing, in particular to a hollow non-straight section composite part which is characterized in that a low-melting-point alloy is used for manufacturing a core mold to serve as a forming inner mold, fiber prepreg is laid on the surface of the core mold and subjected to curing treatment to form a shell structure, finally, the inner mold is removed in a melting mode, and the hollow non-straight section composite part is obtained. According to the hollow non-straight composite material part manufacturing method, the characteristic that materials can be controllably removed is utilized, the mold design is greatly simplified, the manufacturing cost is reduced, and meanwhile the forming freedom degree of a complex geometric structure is improved.

The invention discloses a casting ball production line metal mold preheating device for high-quality copper casting manufacturing, and relates to the field of casting manufacturing, the casting ball production line metal mold preheating device comprises a mold, a heat exchange mechanism, a heat pipe, a cold pipe and a cold and hot switching conveying mechanism; the device has the advantages of being reasonable and simple in structure, low in production cost and convenient to install, efficient circulating preheating of hot liquid is achieved through cooperative operation of the conveying pump, the heat pipe, the cold pipe and other components, the hot liquid fully exchanges heat with the mold in the heat exchange annular groove through the spiral flow guide pieces, and the preheating efficiency is greatly improved; the valve element is driven by the oil cylinder to move to achieve cold and hot passage switching, the function switching from preheating to cooling of the mold can be rapidly completed, the smoothness of the production process is guaranteed, and the production period is shortened; in the cooling process, cold liquid can flow back to the hot liquid cavity after absorbing heat of the mold, cyclic utilization of the cooling liquid is achieved, energy waste is effectively avoided, the production cost is reduced, and the resource utilization rate is increased.

The invention discloses a manufacturing method of 925 silver jewelry, which comprises the following steps: S1, preparing alloy components, S2, designing a cast tree structure, S3, casting, and S4, densifying a casting, the alloy components comprise 92.5-93.0% of silver, 1.0-3.0% of platinum, 0.05-0.5% of copper, 1.5-3.5% of zinc, 1.5-3.5% of indium, 0.03-0.3% of tin, 0.05-0.5% of germanium, 0.03-0.3% of rare earth, and 0.003-0.02% of boron. According to the manufacturing method, alloy components are optimized, the casting performance of the alloy components is improved, the casting process is optimized, the feeding capacity of molten metal is improved, shrinkage porosity and air holes are reduced, the initial density of the casting is improved, and subsequent composite treatment is carried out, so that the density from the surface to the shallow surface of the casting is further improved, grains are refined, and the surface roughness is further reduced; and the requirement of high brightness of the jewelry surface is met.

The present invention relates to ship machinery technology and discloses a casting method for a servo valve body, comprising the following steps: step S100: formulating casting equipment for a casting process through three-dimensional mapping design, casting simulation, optimization design, and simulation verification in sequence, placing patches, risers, and chills on both sides of a valve core of a mold and on an upper surface of the mold, respectively, wherein the patches, risers, and chills synergistically form a temperature gradient to control and optimize the solidification process of the casting; step S200: placing a series core frame for connecting a resin chromite sand layer and an ester-hardened water glass sand layer in series in the mold, then filling the working surfaces of the mold and the core with resin chromite sand, and filling the non-working surfaces with ester-hardened water glass sand; and step S300: smelting molten steel, wherein the smelting controlled components (percentage) are: C: 0.34-0.35, Si: 0.45-0.46, Mn: 0.70-0.71, Cr: 0.93-0.95, Mo: 0.20-0.30, and S and P ≤ 0.025. The present invention can solve the technical problems of poor performance and poor quality of valve bodies in the prior art.

The invention relates to a casting head system wax mold design and processing method based on photocuring molding, which comprises the following steps: constructing an annular riser wax mold three-dimensional model and a sprue wax mold three-dimensional model based on a casting process construction drawing of a closed impeller structure casting; designing a three-dimensional model of an annular riser wax mold and a three-dimensional model of a sprue wax mold corresponding to the constructed three-dimensional model of the annular riser wax mold and the three-dimensional model of the sprue wax mold on the basis of the structural characteristics of rotary bodies of the annular riser wax mold and the sprue wax mold; setting structural parameters of the three-dimensional models of the annular riser wax pattern mold and the sprue wax pattern mold, namely sequentially determining a bottom supporting structure, determining an internal supporting structure, setting an inclined printing angle and setting slicing parameters of the three-dimensional models, and finally forming a model which can be used for printing; and importing the model into a photocuring forming machine, and arranging and printing the model according to the spatial size of the photocuring forming machine.

The invention relates to a large-scale high-temperature alloy blank casting method capable of controlling the casting size, and belongs to the technical field of high-temperature alloy casting. Measuring a temperature curve of the sand mold after the high-temperature alloy is poured; a process model is created, simulation software is used for carrying out stress deformation simulation, a part model of the casting is created, the simulation result of the part model and the simulation result of the process model are compared, the reduced scale, correction and the machining amount are adjusted in real time, and the process model is obtained; manufacturing a process pattern according to the process model, and producing a sand mold by utilizing the process pattern; creating a sand core model, inputting sand mold temperature curve parameters into simulation software, carrying out sand core deformation stress simulation, measuring sand core deformation stress, and manufacturing a core box according to the sand core model; a core bar is manufactured according to the design, the manufactured core bar is placed in a core box, and a sand core is manufactured; demolding the sand core; combining the sand core with the sand mold to obtain a casting cavity; and molten steel is poured into a casting cavity, and a casting blank is formed after cooling and solidification.

The utility model relates to the technical field of hub casting, in particular to an aluminum alloy hub casting forming die which comprises a lower die and an upper die, two limiting sleeves are connected to the tops of the two sides of the lower die respectively, and the tops of two sets of hooks are rotationally connected with the side wall of the upper die through fixing shafts respectively. The bottoms of the two sets of hooks abut against the side walls of the limiting sleeves correspondingly, connecting shafts are perpendicularly connected to the centers of the side walls of the two sets of hooks, air cylinders are installed on the two sides of the bottom of the lower die correspondingly, push blocks are installed on output shafts at one ends of the two air cylinders correspondingly, driving rods are rotationally connected to the two push blocks correspondingly, and a top plate is arranged on one sides of the two sets of hooks. The two ends of the two top plates are rotationally connected with the two connecting shafts correspondingly, and the tops of the two driving rods are rotationally connected with the centers of the bottoms of the top plates through top blocks correspondingly. The locking control can be quickly carried out on the end parts of the two sides of the upper and lower dies, the locking effect is good, meanwhile, die opening control can be carried out, and finished product blanking is facilitated.

The invention discloses a vacuum negative pressure vibration assisted precision casting forming method. The method comprises the steps of model preparation, sand box and dry sand pretreatment, layered vibration sand filling, film covering vacuumizing, molten metal smelting and purification treatment, negative pressure vibration pouring, pressure maintaining solidification, segmented temperature control and pressure relief box opening and multi-stage cleaning aftertreatment. The core of the method is that mechanical vibration and a vacuum negative pressure technology are deeply coordinated and penetrate through the whole process of modeling, pouring and solidification, and meanwhile, a series of fine control means such as dry sand accurate pretreatment, molten metal rotary blowing degassing and instantaneous inoculation, stepped negative pressure control, temperature-related segmented pressure relief and two-stage shot blasting cleaning are matched; through dynamic cooperation of vibration and negative pressure, the sand mold compaction uniformity, the molten metal mold filling capacity and the solidification feeding effect are remarkably improved, the casting defects of air holes, shrinkage porosity, insufficient pouring and the like are effectively reduced, and the internal density, the size precision and the surface quality of a casting can be remarkably improved.

The application relates to the technical field of foundry molding, in particular to an aluminum alloy casting sand core molding machine; the machine comprises a base and a stand column fixedly connected to the rear position of the upper surface of the base; the upper end of the stand column is rotationally connected to a top base provided with an upper hydraulic cylinder; the lower end of the upper hydraulic cylinder is fixedly connected to a pressing plate; the front position of the upper surface of the base is fixedly connected to a support through a lower hydraulic cylinder; a plurality of electric push rods are embedded in the upper surface of the support; the upper surface of the support is provided with a mold plate provided with a mold sample and a rod groove; the mold plate drives a sand frame to move up and down in a hopper through control, so that a pressing strip can repeatedly beat the coated sand on the upper end of the sand frame, and the hopper assists the coated sand on the upper end of the sand frame to be supplemented, the coated sand in the sand frame is more compact and uniform in filling and pressing, the quality of the formed sand mold is improved, and compared with manual filling and pressing, the machine is more efficient and convenient.

The invention discloses a precision gear mold, and relates to the field of industrial machining, the precision gear mold comprises a mounting frame, the mounting frame is U-shaped, an upper top plate is arranged at the top of the mounting frame, a mold main body is arranged on the mounting frame, the mold main body comprises an upper mold and a lower mold, a placement groove is formed in the lower mold, and the upper mold is provided with a positioning groove; a bottom forming plate is arranged in the containing groove, an open groove matched with the containing groove is formed in the upper mold, and a top forming plate matched with the bottom forming plate is arranged in the open groove. The optical camera is aligned with a positioning point, the limiting lantern ring is matched with the limiting shaft, the mounting block is in butt joint with the mounting groove, and the limiting rod is matched with the limiting hole, so that rapid die combination and precise positioning are achieved, and a foundation is laid for precise gear die casting.

The invention relates to the technical field of casting modeling, and discloses magnetic suspension vacuum pump body high-toughness aluminum alloy end cover casting equipment which comprises a jolt ramming table and a sand box body arranged at the top of the jolt ramming table, a fixed bottom plate is arranged in the sand box body, and a slidable lifting box is arranged at the bottom of the fixed bottom plate; a plurality of positioning rods are elastically installed in the lifting box, first through holes allowing the positioning rods to pass through are formed in the top face of the fixed bottom plate, the rod walls of the positioning rods are slidably attached to the inner walls of the first through holes, and the top ends of the positioning rods are arranged in an arc mode. According to the device, the bottom of the white mold in an irregular shape is attached to the outline of the positioning rod array, the placing stability of the white mold in the irregular shape is guaranteed, compared with a traditional manual sand padding fixing mode, the defects of cold shut and insufficient pouring caused by inclination of the white mold are fundamentally overcome, and the equipment adaptability and the production efficiency are remarkably improved.

The steel wire rope rigging forming mold comprises a supporting frame, a lower mold base is movably installed in an inner cavity of the supporting frame, an upper mold base is slidably installed on the top of the lower mold base, and a mold body is fixedly installed in an inner cavity of the upper mold base; the knocking mechanism is used for cleaning bubbles generated when the steel wire rope rigging raw materials are poured; the knocking mechanism comprises a water inlet groove, the water inlet groove is formed in the top of the upper die base, and a water wheel blade is rotationally installed in an inner cavity of the water inlet groove. Raw materials are injected into an inner cavity of a mold through a discharging groove, meanwhile, cooling water is injected into an inner cavity of a water inlet groove, cooling of the raw materials is accelerated, when the cooling water is added, the cooling water impacts water wheel blades to enable the water wheel blades to rotate, the water wheel blades drive a connecting rod to rotate, the connecting rod drives a second rotating rod to rotate, and when the connecting rod is separated from a second rotating shaft, pulling of a spring is matched; and the second rotating rod drives the knocking hammer to knock on the knocking plate, the knocking plate vibrates and transmits vibration to the upper die base and the die, and bubbles in the raw materials in the inner cavity of the die are discharged.

The utility model relates to a forming die, in particular to a radiator forming die. The utility model provides the radiator forming mold convenient for double-cavity demolding. The device comprises a rack, die boxes, box covers, a tensioning adjusting assembly, a demolding assembly and the like, the two vertically-arranged die boxes are installed on the top of the rack, the box covers are assembled on the opposite sides of the two die boxes, the die boxes and the box covers are matched to be used for die-casting forming of a radiator, the tensioning adjusting assembly is connected between the two box covers, and the demolding assembly is connected with the tensioning adjusting assembly. A demolding assembly capable of ejecting the radiators on the two sides out at the same time is arranged between the rack and the mold box. The box covers on the two sides can be conveniently assembled with or disassembled from the mold box at the same time through the tensioning adjusting assembly; and through the demolding assembly, the radiators formed in the mold boxes on the two sides can be conveniently ejected out, demolded and unloaded at the same time, operation is easy and convenient, and the rapid demolding efficiency of the forming mold of the double-cavity structure can be improved.

The invention discloses a high-deformability ceramic core with a compact surface and a porous core structure and a preparation method of the high-deformability ceramic core. The ceramic core is formed by compounding a ceramic core with the porous core structure and a compact inert coating on the outer surface of the ceramic core, the ceramic core with the porous structure at the core part comprises the following substances in percentage by weight: 42 to 51 percent of ceramic powder component, 35 to 40 percent of hollow glass bead component, 4 to 9 percent of fiber component, 3 to 7 percent of graphite and 2 to 8 percent of starch; and the densified inert coating comprises the following substances in percentage by weight: 67 to 75 percent of sol component and 25 to 33 percent of nano powder component. The preparation method comprises the following steps: preparing a core porous structure ceramic core and densified inert coating slurry; and the ceramic core with the porous structure at the core part is impregnated with the densified inert coating slurry under sectional vacuum pressure in a gradient pressure reduction manner, and then is put into a heat treatment furnace for sintering treatment. The prepared ceramic core has excellent deformability, the problem of blade hot cracking can be solved, interface reaction can be avoided through the inert coating, and efficient depoling is facilitated through the porous structure of the core.

The invention relates to the technical field of casting molds, and discloses an automobile planet carrier casting mold which comprises a mold plate arranged between an upper mold and a lower mold, an upper sand mold, a lower sand mold, a sand core and a sprue are installed on the mold plate, and the sand core is located between the upper sand mold and the lower sand mold and used for blocking cavity communication of the upper sand mold and the lower sand mold; guide columns corresponding to the upper and lower dies are mounted on the upper and lower end faces of the template, and are inserted into guide holes of the upper and lower dies, so that accurate die assembly is realized. Through combination of the upper sand mold, the lower sand mold and the sand core, the mold can mold an upper casting and a lower casting at the same time by using the sand core to block communication of the mold cavity, the production efficiency is greatly improved, the thickness of the sand core is set to be 0.8 times of the wall thickness of the casting, shrinkage porosity linearity caused by a hot spot in the casting can be avoided, and meanwhile, the production efficiency is improved. The pouring gate supplies liquid to the upper sand mold and the lower sand mold through the residue filter, impurities in molten metal are removed through the filtering assembly, the shrinkage porosity defect caused by the impurities is reduced, and therefore the qualification rate of castings is increased.

The invention relates to the field of 3D printing intelligent casting, in particular to a casting method of a rotor. The problems that in the prior art, manual molding is needed, the production efficiency is low, and the production cost is high are solved, the 3D printing process technology based on the cast sand core is provided, the feeding problem is solved through the measures of reasonably arranging a riser, a patch, simulation software and the like, the sand core is printed through the 3D printing forming technology, the spiral rotor is difficult to mold, and the production efficiency is improved. And finally, the spiral rotor casting meeting the standard precision requirement is produced, and the casting quality of the spiral rotor casting is remarkably improved.

The invention discloses a molten metal fluidity improving method and system in the V-method casting process, and relates to the technical field of casting, a high-pressure airflow and mechanical brush composite mode is adopted for cleaning a casting mold cavity and preheating the casting mold cavity, and precoated sand is selected for preparing a sand mold through vacuum negative-pressure compaction; a sectional type negative pressure regulation and control strategy is adopted, and the stepped composite pouring gate structure is optimized; degassing the molten metal by argon or nitrogen, controlling the temperature, and adding an inoculant and a flow promoter in proportion; the casting speed is controlled according to the three-section type rate through the casting table with the adjustable inclination angle; arranging an insulated riser at the thick and large part of the casting, maintaining a negative pressure field after casting, and covering an insulating material; dividing cooling areas according to wall thickness, and gradually relieving pressure after cooling to a set temperature; and after shot blasting and flaw detection, recording data and establishing a process parameter-flowability association database. Through mold preheating, negative pressure gradient regulation and control and pouring gate design improvement, the molten metal fluidity is remarkably improved, and the casting quality stability and the production efficiency are greatly improved.

The invention relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a special coating for a large machine tool casting lost foam as well as application and a use method of the special coating. According to the invention, the full-temperature-range functional composite material and the composite aggregate are used for synergistic reinforcement, and mullite is used for high-temperature reinforcement; the temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance; spodumene is used as a thermal expansion adaptive fluxing agent, so that medium-temperature healing and thermal expansion adjustment of a coating system are facilitated; the composite reinforced fibers are reinforced and toughened aiming at large thermal stress of thick and large parts; as an ultralow-temperature glazing agent, the boron-containing glazing agent can form an initial liquid phase at about 450 DEG C to seal the surface of the coating and purify a ventilation channel; the rare earth oxide serving as a high-temperature phase stabilizer can be dissolved in mullite crystal lattices, so that the high-temperature phase stability is improved, and ceramic nodes are refined. Through raw material design, on the premise of ensuring moderate air permeability, the ultrahigh strength and crack resistance of a coating system at extremely high temperature are improved.

A casting mould for producing a casting formed from a light metal alloy, in particular a housing for an electric drive for a motor vehicle. The casting mould advantageously has at least one sand core which is designed and arranged in the casting mould in such a way that the at least at least one sand core can be completely surrounded, at least in sections, in a circumferential direction by a light metal melt with which the casting mould is filled to form the casting. It is advantageous to be able to produce a casting in which, for example, a cooling channel is incorporated. It is not necessary to drill a hole to form a channel. Furthermore, the invention relates to a process for manufacturing a casting made of a light metal alloy, in particular a housing for an electric drive for a motor vehicle.

The invention relates to the technical field of sand mold casting, and particularly discloses a gradient exhaust sand mold for an aluminum alloy thin-walled workpiece and a preparation method thereof.The sand mold comprises a cavity surface layer (with the hardness ranging from 90 HB to 95 HB), a transition layer (with the hardness ranging from 80 HB to 70 HB and a back sand layer (with the hardness ranging from 60 HB to 65 HB) which are arranged from inside to outside, and microporous ceramic exhaust rods (with the diameter ranging from 0.3 mm to 0.8 mm and the distance ranging from 1 mm to 3 mm) are embedded in the cavity surface layer; the exhaust rod is composed of a mullite fiber matrix and a nanometer gamma-AlO coating, the porosity is 40-50%, and the exhaust rod penetrates through the back sand layer to form a directional exhaust network. The preparation method comprises the following steps: mixing sand layer by layer (the cavity layer contains 1.0-1.5% of phenolic resin, and the back sand layer contains 0.4-0.6% of resin and 4-6% of starch); when sand is filled to the position 1-3 mm away from the surface of the cavity, an exhaust rod is implanted (the positioning precision is + / -0.1 mm); gradient compaction is carried out (the high pressure of a cavity is 3.0-4.0 MPa, the vibration of a transition area is 20-30 Hz, and the back sand airflow is 0.1-0.2 MPa); and carrying out microwave curing (2.5 to 3.5 kW, 60 to 120 s). The defects of hot cracks and air holes of the thin-wall part (smaller than or equal to 5 mm) are overcome synchronously, and the casting yield is increased to 95% or above.

The invention provides a brake disc air duct core and a manufacturing method thereof and a core box device, and relates to the technical field of casting devices.The brake disc air duct core is characterized in that a plurality of strip-shaped air ducts are evenly formed in the surface of a sand core body, the air ducts extend from the center of the sand core body to the edge, and the sand core body protrudes around the periphery of the sand core body in the vertical direction to form an outer ring core head; the middle of the sand core body protrudes in the vertical direction to form a middle core head, a protruding sand shooting face is arranged at the top of the middle core head, the middle core head and the bottom of the sand shooting face are hollow to form a middle sand core runner, and the technical problems that in the prior art, filling is insufficient in a thin-wall area or the edge, and the forming effect is poor are solved. The technical effect of improving the forming rate and the structural stability is achieved.

The invention relates to the technical field of titanium alloy investment precision casting, and particularly provides a titanium alloy multistage deep blind hole investment casting method which comprises the following steps: designing an exhaust hole and a slag removal hole; establishing a model; assembling and welding; soaking the surface layer in a vacuum negative pressure environment, continuously vacuumizing, deflating after soaking, taking out the module, and rotating to uniformly control the slurry; preparing a surface layer; performing segmented grouting on the deep blind hole; making a shell from a back layer; roasting and molding; washing and drying; pouring is conducted; shell cleaning and sand blasting; sealing and welding the process holes; and performing stress relief annealing. And a dynamic vacuumizing means is adopted, and a vacuumizing device is always kept in an open state, so that the compactness of a surface layer is improved, and burrs of a casting are reduced. Through vacuum dynamic slurry immersion, segmented grouting and collaborative design of the exhaust hole and the slag removal hole, investment precision casting forming of the high-precision oil pump shell can be supported, the shell manufacturing efficiency of the multi-stage deep blind hole is improved, and the filling defect rate is reduced.

The invention relates to a method for manufacturing a hollow turbine blade (10) for a turbine engine, the hollow blade (10) comprising a pressure side wall (16) and a suction side wall (18), an internal cooling channel (28) passing through the pressure side wall and the suction side wall, the invention relates to a method for manufacturing a blade (10), comprising at least a first moulding stage (PH1, PH '1) using a lost wax casting technique using molten metal, the first moulding stage (PH1, PH' 1) comprising at least one step b) of manufacturing a mould (34) made of a refractory material, the inner wall (36) of the mould being matched to the outer shape of the blade (10) to be manufactured, in which step b) the inner wall (36) of the mould (34) is matched to the outer shape of the blade (10) to be manufactured. A plurality of protrusions (52) are formed on an inner wall (36) of a mold (34) made of refractory material, the plurality of protrusions defining an outlet opening counter-shape (30) of an internal cooling channel (28).

The present invention relates to the technical field of mold release agents, and specifically discloses a mold release agent for the integrated die-casting of aluminum alloy automobiles, which comprises the following raw materials in parts by weight: 15-20 parts of fluorinated wax emulsion, 6-8 parts of sodium dodecylbenzenesulfonate, 3-6 parts of Tween 80, 3-5 parts of methylphenyl modified silicone oil, 4-6 parts of graphene regulator, 2-4 parts of nano-silica modifier, 2-4 parts of silane coupling agent, and 10-15 parts of water. The mold release agent of the present invention uses fluorinated wax emulsion in combination with sodium dodecylbenzenesulfonate, Tween 80, and methylphenyl modified silicone as the matrix materials, and through the addition of graphene regulator, nano-silica modifier, and silane coupling agent to coordinate with each other and work together synergistically, with the silane coupling agent as the interfacial agent to enhance the interfacial effect between the raw materials of the system.

The invention relates to the technical field of investment mold shell casting, in particular to an investment mold shell casting system which comprises a rack, a slurry barrel, a roasting furnace, a cooling barrel and a slag collecting barrel are sequentially installed on the rack in the clockwise direction, and multiple sets of regularly-distributed elastic striking rods are installed on the inner wall of the slag collecting barrel. A loading and unloading station is arranged at the position, corresponding to the position between the slurry barrel and the slag collecting barrel, of the machine frame, a casting frame is installed on the machine frame in a liftable mode, a transmission unit is arranged on the casting frame, and the transmission unit is in transmission connection with a rotating station frame capable of periodically rotating by 72 degrees and a rotatable transmission gear ring. The casting equipment has the beneficial effects that casting links such as ceramic slurry coating, roasting, cooling and slag collecting are integrated into the same equipment, and the orderly circulation of a parison among the links is realized through the slurry barrel, the roasting furnace, the cooling barrel and the slag collecting barrel which are sequentially arranged on the rack in the clockwise direction and the rotary station frame capable of periodically rotating.

The present invention discloses molding sand additive packages, molding sand binder compositions comprising the molding sand additive packages, molding sand comprising the molding sand binder compositions, use of the molding sand and a method of sand casting.