122 results about "Vacuum casting" patented technology

The invention relates to the field of casting equipment, and discloses a vacuum casting mold which comprises a bottom plate, a first fixing rod is fixedly mounted on the bottom plate, a top plate is fixedly mounted at the top of the first fixing rod, a first telescopic rod is fixedly mounted in the center of the bottom of the top plate, and an upper mold is fixedly mounted at the bottom of the first telescopic rod. A centering adjusting device is arranged in the center of the top of the bottom plate; the lifting part is started to drive the mounting base to ascend and descend, so that the limiting part slides on the top of the bottom plate and the top of the adjusting part, the limiting part can make contact with the adjusting part in the sliding process, the position of the limiting part is limited through the adjusting part, and the problems of inclination and deformation possibly generated when the upper mold and the lower mold are closed are solved; and after the upper mold and the lower mold are assembled to complete a casting, the centering clamping piece clamps the lower mold, the upper mold and the lower mold are separated, and the problem that when the upper mold ascends, the lower mold is driven to ascend synchronously, and consequently mold separation is difficult is solved.

The invention discloses a mutual inductor epoxy resin vacuum pouring mold forming method, and relates to the technical field of electrical equipment manufacturing, the mutual inductor epoxy resin vacuum pouring mold forming method comprises the following steps: S1, pretreatment; s2, a pouring system is preheated; s3, loading and sealing the mold; s4, establishing a vacuum environment; s5, performing resin mixing and anti-reflux control; s6, vacuum pouring is conducted; step S7, carrying out secondary defoaming treatment; step S8, curing pretreatment; and S9, curing and forming. According to the mutual inductor epoxy resin vacuum pouring mold forming method, through cooperative control of high-precision vacuum and intelligent bubble removal, pouring microbubbles are thoroughly eliminated, the hidden danger of equipment operation discharge is completely eradicated, cascade preheating and laminar flow pouring technologies are innovated, the manufacturing period is remarkably shortened, and double breakthrough of high quality and high efficiency is achieved; due to the fact that the defect rate is sharply reduced and energy consumption is optimized, reworking and manufacturing cost is greatly reduced, and industrial economic benefits are improved.

The application provides a high-strength nano-particle reinforced high-temperature-resistant austenitic stainless steel and a preparation method thereof. The preparation method of the high-strength nano-particle reinforced high-temperature-resistant austenitic stainless steel comprises the following steps: firstly, Ti powder and B4C powder are mixed to obtain mixed powder; then the mixed powder and nickel powder are mixed in four proportions and sequentially placed into a nickel thin tube layer by layer from top to bottom according to a certain mass ratio; laser welding technology is used for welding to obtain a nickel column body with gradient distribution of the mixed powder; nano-particles are introduced into the stainless steel liquid by adding the nickel column body in the melting process of the austenitic stainless steel; and finally, the high-strength nano-particle reinforced high-temperature-resistant austenitic stainless steel is obtained after vacuum casting, high-temperature homogenization and solid solution quenching. The high-strength nano-particle reinforced high-temperature-resistant austenitic stainless steel obtained by the application has a yield strength of greater than or equal to 165 MPa and a tensile strength of greater than or equal to 347 MPa when used at a working temperature of 600 DEG C or above.

The invention relates to a control method for increasing the boron content in a forge piece through double-vacuum smelting of 2.25 Cr1Mo0.25 V steel, belongs to the technical field of smelting, and solves at least one of the problems that in an existing 2.25 Cr1Mo0.25 V steel smelting process, the boron content cannot reach the effective effect content, the boron content fluctuation between heat times is large, and an existing boron control process is incompatible with a 2.25 Cr1Mo0.25 V steel double-vacuum process. A control method for improving the boron content in a forge piece through double vacuum smelting of 2.25 Cr1Mo0.25 V steel comprises the steps that vacuum carbon deoxidation refining is conducted, specifically, slagging, diffusion deoxidation, alloying, vacuum treatment, component fine adjustment and soft blowing are conducted on molten steel, and key element adding is conducted; and the vacuum casting comprises preparation before casting and vacuum casting protection. According to the method, the effective boron content is increased, the boron content fluctuation among the heats is reduced, and the process compatibility is good.

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

The invention relates to the technical field of pouring materials, in particular to an epoxy resin pouring material and a preparation method and application thereof. The component A is prepared from the following raw materials in parts by mass: 30 to 50 parts of matrix resin, 1 to 5 parts of diluent, 0.3 to 1.5 parts of first aid, 2 to 10 parts of first flexibilizer and 20 to 75 parts of first filler; the component B is prepared from the following raw materials in parts by mass: 25 to 50 parts of curing agent, 0.2 to 1 part of second aid, 5 to 20 parts of second toughening agent, 20 to 85 parts of second filler and 0.1 to 1 part of accelerant. The prepared epoxy resin castable has good settling resistance and flowability, and the problems of material shortage and difficulty in permeation in the pouring process are solved; in addition, Tg, bending performance and tensile performance all meet the target, and the vacuum pouring device is suitable for vacuum pouring scenes of dry-type transformer coils and mutual inductors.

The present invention relates to a method for preparing high-purity iron powder, comprising the following steps: 1) adding blast furnace molten iron subjected to three-decarburization treatment to a converter, wherein the tapping temperature of the molten steel at the end of blowing is higher than 1750°C and the active oxygen content is ≥0.085%. 2) performing RH vacuum oxygen blowing decarburization treatment on the molten steel in the ladle, wherein the composition of the molten steel after treatment is [O] ≥0.010%. 3) moving the ladle to a VD, performing vacuum treatment, and allowing the molten steel to stand for ≥20 minutes. 4) forming an ingot from the molten steel using a vacuum casting method to obtain "oxygen-enriched high-purity iron" having an ingot composition of [Fe] + [O] ≥99.99%. 6) casting the "oxygen-enriched high-purity iron" ingot into "oxygen-enriched high-purity iron powder". 7) passing the "oxygen-enriched high-purity iron powder" through a hydrogen reduction furnace to remove oxygen and obtain "hydrogen-containing high-purity iron powder". 8) placing the "hydrogen-containing high-purity iron powder" in a vacuum heating furnace for vacuum heating dehydrogenation treatment, cooling the mixture after treatment, and packaging the mixture to ultimately obtain high-purity iron powder. The present invention can obtain high-purity iron powder with a purity greater than 99.99% and significantly reduce the production cost of the high-purity iron powder.

The utility model discloses a sand filling device for V-process casting, which belongs to the technical field of vacuum casting and is characterized in that a swing frame is movably mounted at the top of a base, a swing motor is mounted on the inner wall of the base, and a half gear intermittently meshed with a toothed plate is mounted at the output end of the swing motor; a sand box is installed in the swing frame, an inserting plate is movably installed on one side of the swing frame, and a positioning air cylinder is installed on the outer wall of the inserting plate. The output end of the adjusting motor is connected with a threaded rod; a moving frame located above the swing frame is arranged between the threaded rods in a threaded mode, a compaction air cylinder is installed at the top of the moving frame, and an extrusion plate is arranged at the output end of the compaction air cylinder. According to the utility model, the swinging frame can be driven to reciprocate relative to the top of the base, so that the sand box vibrates regularly. The sand box can be fixed through the detachable inserting plate and the positioning air cylinder, so that the requirement for sand boxes of different specifications is met, the motor is adjusted to drive the moving frame to reciprocate along the swing frame, filling sand is compacted, and the practicability and the freedom degree are improved through the design.

The utility model belongs to the field of voltage transformers, and particularly relates to an outdoor secondary cast aluminum junction box single-phase voltage transformer. A secondary connecting terminal is arranged at the bottom of the side wall of a shell; a cast aluminum junction box is arranged at the bottom of the side wall of the shell; the secondary connection terminal is led out from the cast aluminum junction box, and the cast aluminum junction box is connected with the shell through a cast aluminum junction box fixing bolt. And the shell is formed by vacuum casting of outdoor epoxy resin. A fully-closed and fully-insulated structure is adopted, shielding treatment is carried out inside the structure, and the primary coil, the secondary coil and the iron core are packaged inside the shell. The voltage transformer is simple in structure, easy to install, good in safety, high in secondary protection level, low in material consumption and low in equipment cost, the safety of the voltage transformer is improved, the protection level can reach IP55, and the partial discharge level meets the international requirement.

The invention discloses a Ni-Mo-Ti alloy reinforced by an ordered D0a / disordered HCP composite structure, which is characterized in that the element percentage composition expression of the Ni-Mo-Ti alloy is (Ni80 + yMo20-y) 100-xTix, x is greater than or equal to 1 and less than or equal to 10, y is greater than or equal to-5 and less than or equal to 5; the microstructure of the Ni-Mo-Ti alloy comprises a face-centered cubic FCC matrix and a strengthening phase embedded in the face-centered cubic FCC matrix, and the strengthening phase is a layered phase formed by compounding an ordered D0a area and a disordered HCP area. The invention further provides a preparation method of the Ni-Mo-Ti alloy reinforced by the ordered D0a / disordered HCP composite structure. The preparation method comprises the following steps of vacuum melting and vacuum casting; carrying out homogenization treatment; multi-pass rolling is conducted at the room temperature, the pass rolling amount is 2%-6%, and the total rolling amount is 60%-90%; and annealing heat treatment is conducted, specifically, the temperature of annealing heat treatment ranges from 910 DEG C to 1150 DEG C, and the time ranges from 1.5 min to 120 min. According to the Ni-Mo-Ti alloy strengthened by the ordered D0a / disordered HCP composite structure and the preparation method of the Ni-Mo-Ti alloy, through the strengthening effect of the ordered D0a and disordered HCP composite layer, the alloy material has ultrahigh strength and high plasticity at the same time, and the comprehensive mechanical property of the alloy material is improved.

The application relates to the field of casting equipment and discloses a mold for vacuum casting, which comprises a bottom plate, a first fixing rod fixedly installed on the bottom plate, a top plate fixedly installed at the top of the first fixing rod, a first telescopic rod fixedly installed at the bottom center of the top plate, an upper mold fixedly installed at the bottom of the first telescopic rod, and a centering adjusting device arranged at the top center of the bottom plate; the installation base is driven to ascend and descend by starting the lifting piece, the limiting piece slides on the bottom plate and the top of the adjusting piece, the limiting piece can be in contact with the adjusting piece during the sliding process, the position of the limiting piece is limited by the adjusting piece, the inclination and deformation problems possibly generated when the upper mold and the lower mold are combined are reduced, the stability during the combining process is improved, after the upper mold and the lower mold are combined to complete the casting, the lower mold is clamped by the centering clamping piece, the upper mold and the lower mold are separated, and the problem that the upper mold is lifted to drive the lower mold to synchronously ascend, thereby causing the separation difficulty is prevented.

This invention relates to a method for producing support roll steel, belonging to the field of metallurgical industry, and solves the problems of high cost and severe shrinkage porosity in existing support roll steel. The method for producing support roll steel includes: smelting, deoxidizing, desulfurizing, and refining the support roll steel ingot raw material, adjusting the alloy composition to obtain a first portion of support roll steel molten steel, tapping the steel, vacuum casting, and solidifying to obtain a solidified billet shell and liquid steel inside the billet shell; smelting, deoxidizing, desulfurizing, and refining the support roll steel ingot raw material, adjusting the alloy composition to obtain a second portion of support roll steel molten steel, tapping the steel, mixing the second portion of support roll steel molten steel with the liquid steel inside the billet shell within the solidified billet shell of the first portion of support roll steel, vacuum casting, solidifying to obtain a complete support roll steel ingot, demolding, removing the sprue, forging, removing the riser, heat treating, and machining to obtain the support roll steel; the composition of the first portion of support roll steel and the second portion of support roll steel molten steel differs.

The system comprises a mounting frame, a circulating water tank is mounted on the mounting frame, a plurality of casting molds are arranged in the circulating water tank at equal intervals, the upper ends of the casting molds penetrate out of a top plate of the circulating water tank, and cover plates are arranged at the top ends of the casting molds; a casting opening is formed in the cover plate and is connected with the melting and mixing pot through a casting pipeline; a first negative pressure suction opening is formed in the bottom of the casting mold and communicates with a first negative pressure pipeline through a first suction pipeline, and the negative pressure suction pipeline is connected with a first vacuum pump. According to the system, the melting and mixing mechanism, the vacuum suction mechanism, the casting mold and the circulating water tank solidification mechanism are integrated, and integrated melting and mixing, negative pressure casting and solidification of materials can be achieved; the negative pressure automatic adjusting vacuum pump is adopted, stable vacuum negative pressure can be formed, and the vacuumizing speed is high.

1. The name of the design product: gypsum vacuum casting integrated machine. 2. The use of the design product: for jewelry lost wax casting integrated machine. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. The design product is not common from the bottom view, so the bottom view is omitted.

The invention provides a preparation method of a nickel-copper alloy. The preparation method comprises the following steps: preparing materials; the method comprises the following steps: firstly, filling part of C and Ni into a vacuum induction furnace, vacuumizing, starting to supply power for melting, and then adding C and Ni in multiple batches and small batches until C and Ni are completely melted; performing refining; al and Ti are added to complete alloying; then Cu is added under the argon atmosphere, and alloying is completed; and vacuum pouring is conducted, and the nickel-copper alloy is obtained. By means of the method, the ultra-pure Monel K-500 alloy ingot can be prepared, meanwhile, the high metal yield is obtained, and efficient utilization of alloy elements is achieved. Results show that the content of N in the alloy ingot is less than 15 ppm, the content of H is less than 3 ppm, the content of O is less than 7 ppm, and the yield of Cu is greater than 98%.

The application discloses a sealing assembly and a vacuum casting mold, relates to the technical field of vacuum die casting mold sealing, and aims to solve the problem of reduced service life of the existing sealing assembly caused by secondary pressure effect during the injection stage. The sealing assembly comprises an annular groove formed on a first parting surface of a fixed mold and an elastic sealing body fixedly installed in the annular groove, a rigid protection structure is fixedly sleeved on the outer surface of the elastic sealing body, and the working end face of the rigid protection structure is flush with a second parting surface. The rigid protection structure directly bears the secondary pressure formed by the penetration of high-pressure metal liquid, protects the elastic sealing body from the compression-shear composite stress, significantly prolongs the service life of the sealing assembly, and improves the reliability and production efficiency of the vacuum casting mold.

The invention relates to the technical field of casting, in particular to a vacuum continuous casting device which is provided with a vacuum casting chamber, a casting cavity is formed in the vacuum casting chamber, a casting crucible is arranged in the casting cavity, and a heating element is arranged on the outer side of the casting crucible. A circle of multiple limiting supports are further fixed to the outer side of the casting crucible, the limiting supports longitudinally slide in the casting cavity, and a fixing support fixed to the inner wall of the casting cavity is arranged below each limiting support. An elastic piece is arranged between each limiting bracket and the fixed bracket under the limiting bracket; a lower flow guide pipe is arranged at the bottom of the casting crucible, the bottom end of the lower flow guide pipe is connected with a crystallizer, and the crystallizer penetrates through the bottom wall of the casting cavity and is in sealed connection with the vacuum casting chamber. When a traction machine pulls a cast ingot, the casting crucible can move downwards along with the cast ingot, at the moment, the elastic piece is pressed to contract so as to buffer acting force from the traction machine, the problem of stress concentration at the joint of the lower flow guide pipe and the crystallizer is relieved to a certain extent, the fracture risk is reduced, and the possibility of copper liquid leakage is reduced.

The invention discloses a vacuum casting forming method and device for an Al-In-based aluminum alloy material, and relates to the technical field of aluminum-based alloys, and the vacuum casting forming method comprises the steps that aluminum and indium are melted to form an initial melt, electromagnetic stirring and ultrasonic treatment are carried out, scandium and cerium elements are added, and a homogenized melt is obtained; after a casting mold is preheated and coated with a refractory coating, mold filling is conducted under the control of vacuum pressure difference; after mold filling, the casting mold is rapidly tilted, multi-stage pressure is applied, and weak electromagnetic stirring in the initial stage of solidification is conducted; and finally cooling to room temperature to obtain a casting. According to the method, grain refinement, oxidation inclusion inhibition and scandium and cerium microalloying are conducted through electromagnetic stirring and ultrasonic wave cooperative treatment to form an Al3Sc nucleation phase and a (Ce, In) Ox indium capturing phase, vacuum pressure difference mold filling and tilting pressurization are combined, the macrosegregation and oxidation defects caused by the density difference of the Al-In alloy are overcome, and the component uniformity and density of a casting are improved.

The utility model relates to an electrified railway line measurement and control device, in particular to a multi-winding high-capacity all-insulation voltage transformer. Comprising a bottom plate and a main insulator arranged on the bottom plate, a transformer body and two primary supports connected with the transformer body are arranged in the main insulator in a sealed mode, the transformer body comprises an iron core, secondary windings and primary windings, multiple sets of secondary windings are wound on the outer side of the iron core, and the primary windings are wound on the outer sides of the multiple sets of secondary windings; the top of the main insulator is provided with two primary insulation columns, the tops of the two primary insulation columns are respectively embedded with two secondary high-voltage terminals, and the two primary high-voltage terminals are respectively connected with the two primary supports; and a secondary wiring terminal is arranged at the bottom of the main insulator. The utility model is formed by vacuum casting of epoxy resin, and has the characteristics of small volume, beautiful appearance, flexible installation, easy maintenance and complete functions.

The invention relates to the technical field of vacuum casting, in particular to a vacuum casting fixed-point pouring method. On the basis that smelting of a smelting furnace in the smelting chamber is completed, the shell is moved to a heat preservation chamber to be positioned, so that a pouring cup of the shell penetrates into a pouring hole in the top of the heat preservation chamber; the push rod is controlled to push the smelting furnace to rotate around a first axis by a first angle in a first rotating direction, so that the smelting furnace rotates from a vertical state to a first inclined state; the lifting rod is controlled to descend the first axis by a preset distance, so that the smelting furnace rotates around the first axis by a second angle in the first rotating direction, and the smelting furnace rotates from the first inclined state to a second inclined state; and the push rod is controlled to rotate the smelting furnace around the first axis by a third angle in the first rotating direction, so that the smelting furnace rotates from the second inclined state to a third inclined state. Therefore, the problem that the falling point precision in the pouring and casting process of molten metal in the smelting furnace is difficult to guarantee due to overlarge height difference under the vacuum condition is solved.

1. The name of the design product: gold and silver ingot casting machine. 2. The use of the design product: for gold and silver vacuum casting. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

This invention relates to high-voltage measurement or relay protection equipment for power supply systems, specifically a current transformer for electrified railways. It includes a casting body and a coil body encapsulated within the casting body. The coil body includes a secondary winding, a primary winding wound around the outside of the secondary winding, and a secondary winding support for supporting the secondary winding. The secondary winding comprises multiple secondary winding units arranged side-by-side, forming an integral structure by wrapping the secondary winding with an outer shielding layer. The secondary terminals of the secondary winding are located at the bottom side of the casting body, and the primary terminals of the primary winding are located at the top of the casting body. Multiple mounting inserts are provided at the bottom of the casting body. This invention is manufactured using epoxy resin vacuum casting, resulting in a product with small size, flexible installation, reliable insulation, high pollution resistance, high dynamic and thermal stability current, and low temperature rise. It is suitable for use in railway traction substation environments, thus improving the overall manufacturing level of railway substation equipment.

The invention relates to the technical field of multi-chamber vacuum casting, in particular to a multi-chamber vacuum casting bearing vehicle movement system and casting equipment. The system comprises a rail unit, a first bearing vehicle, a second bearing vehicle and a jacking unit. The first bearing vehicle moves along the track unit; the first bearing vehicle is provided with a first jacking hole and a first avoiding opening which vertically penetrate through the first bearing vehicle. The second bearing vehicle moves along the track unit; the second bearing vehicle is provided with a second jacking hole and a second receding opening which vertically penetrate through the second bearing vehicle. The jacking unit is located in the transition area; the jacking unit is arranged in a lifting mode in the vertical direction. The first jacking hole and the second jacking hole are used for avoiding the lifting process of the jacking unit; the first avoiding opening is used for avoiding the jacking unit when the first bearing vehicle moves; the second avoiding opening is used for avoiding the jacking unit when the second bearing vehicle moves; therefore, the scheduling problem of the shell assembly and the auxiliary transfer mechanism in the large-scale multi-chamber vacuum casting equipment is solved.

The present application relates to the technical field of transformer, in particular to a dry-type transformer for semiconductor equipment, comprising: a core winding unit formed by epoxy resin vacuum casting; a multilayer nano ceramic insulation layer wrapped on the surface of the core winding unit conductor; an internal liquid cooling channel module integrated between the layers of the core winding unit; an electromagnetic shielding shell wrapped on the whole transformer body; and an intelligent monitoring system installed on the electromagnetic shielding shell for monitoring the dry-type transformer; the dry-type transformer has high safety and good stability.

The present application relates to the technical field of insulating dry-type transformers, and in particular to a high-voltage winding, a preparation method therefor, and a use thereof. The present application provides a preparation method for a high-voltage winding, comprising the following steps: using a silicone rubber solution to carry out first vacuum casting on an uncast high-voltage winding, and then carrying out first curing molding to obtain primarily cast high-voltage winding; and winding glass fiber mesh fabrics on the inner side and the outer side of the primarily cast high-voltage winding, then using a polyurethane resin solution to carry out second vacuum casting, and carrying out second curing molding to obtain the high-voltage winding. A copper material wrapped in the high-voltage winding can be conveniently recovered.

The invention discloses a piercing plug with a heat-resistant head and steel adhesion difficulty and a preparation process of the piercing plug, belongs to the technical field of metal materials, and aims to solve the technical problem that the high-temperature resistance of a piercing plug for a high-strength seamless steel pipe in the prior art needs to be further enhanced. Pouring on a preheated stainless steel mold, and carrying out vacuum casting to obtain a cast ingot; the cast ingot is placed in a preheated muffle furnace for heat preservation, heating and heat preservation are conducted, quenching, tempering and furnace cooling are conducted, and a piercing plug base body is obtained; the surface of the piercing plug base body is subjected to rough grinding, laser cladding of a transition layer and a ceramic layer, annealing, grinding and polishing treatment are conducted in sequence, and the piercing plug with the heat-resistant head and not prone to steel adhesion is obtained; the piercing plug with the heat-resistant head not easy to stick to steel, prepared by the invention, not only has good high temperature resistance and wear resistance, but also has good hardness, is not easy to stick to steel, and is beneficial to service life.

The present disclosure relates to the technical field of copper alloy processing. Provided in the embodiments of the present disclosure is a preparation method for a high-strength and high-conductivity Cu-Cr-Zr-series alloy. The preparation method comprises: subjecting an alloy to vacuum casting, a hot forging treatment and an aging treatment, wherein the alloy comprises the following components in percentages by mass: 0.50-1.20% of Cr, 0.08-0.25% of Zr, 0.01-0.10% of Nb, and the balance of Cu. The alloy prepared by using the preparation method has both a high strength and a high conductivity. The preparation method of the present disclosure is simple in terms of process, and is easy to operate and implement; and on the premise of shortening the preparation process of the alloy, the method reduces the production cost, and facilitates industrial production and promotion.

The invention discloses an environment-friendly vacuum casting method for iron castings. The environment-friendly vacuum casting method comprises the steps that 1, heat conduction filler is prepared; (2) mixing all-organic environment-friendly sand; (3) cast iron smelting and inoculation treatment; (4) casting mold modeling and vacuum pretreatment are carried out; (5) pouring operation is carried out; (6) microwave-assisted solidification; (7) shakeout and surface cleaning; (8) molding sand reuse treatment; and (9) detecting. According to the environment-friendly vacuum casting method for the iron casting, through the core-shell heat conduction filler and interface modification, the heat conductivity coefficient of the molding sand reaches 1.2-1.3 W / (mK), the strength is larger than or equal to 1.1 MPa, and VOCs is smaller than or equal to 3 mg / m; zoned microwave temperature control and electromagnetic shielding are adopted, the temperature difference of a casting is smaller than or equal to 50 DEG C, and the pearlite content is 90-93%; segregation is eliminated by adopting a pre-alloying nucleating agent, and the mechanical property is improved by 10-40%; molding sand reuse is not less than 5 times, and the regeneration utilization rate is not less than 80%; double-medium cleaning is adopted, so that the sand removal rate is greater than or equal to 99.5%, and secondary pollution is avoided; and full-process detection is adopted, so that the percent of pass reaches 95-98%, and the quality is traceable.

This invention relates to the field of multi-chamber vacuum casting technology, specifically to a multi-chamber vacuum casting carrier movement system and casting equipment. The system includes a track unit, a first carrier, a second carrier, and a lifting unit. The first carrier moves along the track unit; the first carrier has a vertically penetrating first lifting hole and a first clearance opening. The second carrier moves along the track unit; the second carrier has a vertically penetrating second lifting hole and a second clearance opening. The lifting unit is located in a transition zone; the lifting unit is vertically raised and lowered; the first and second lifting holes are used to avoid the lifting unit during its raising and lowering process; the first clearance opening is used to avoid the lifting unit when the first carrier moves; the second clearance opening is used to avoid the lifting unit when the second carrier moves; thereby solving the scheduling problem of the mold shell assembly and auxiliary transfer mechanism in large multi-chamber vacuum casting equipment.

The utility model relates to the technical field of graphite type vacuum casting, in particular to a fan impeller casting mold which comprises an upper casting mold and a lower casting mold. Wherein the upper center of the upper casting mold is provided with a core hanging ring casting mold; wherein an impeller pouring cavity is formed between the upper casting mold and the lower casting mold, and a plurality of long and short blade core casting molds are arranged in the impeller pouring cavity; wherein the long and short blade core casting molds are annularly arrayed by taking the center of the core lifting ring casting mold as a circle center; the sprue gate is formed in the center of the upper part of the core hanging ring casting mold, and the bottom end is communicated with the impeller pouring cavity; wherein a plurality of lower mold exhaust holes are evenly distributed in the surface of the lower mold, a plurality of lower mold exhaust grooves are formed in the bottom face of the lower mold in an annular array mode, and the two ends of each lower mold exhaust hole communicate with the impeller pouring cavity and the corresponding lower mold exhaust groove correspondingly.