240 results about "Mold filling" patented technology

The invention relates to the field of metal mold casting, in particular to a multi-conjoined shell pouring system and a mold, the pouring system comprises a horizontal runner, at least one straight runner arranged below the horizontal runner and at least two vertical runners arranged above the horizontal runner, the vertical runners are mutually independent, and the vertical runners are mutually independent. The axis of the vertical cross gate is concentric with the center of a casting bottom flange and leads to a casting inner cavity, the casting bottom flange inner cavity is provided with a bottom flange ingate, the bottom flange ingate is communicated with the vertical cross gate, the end flange cross gate is cylindrical, the axis of the end flange cross gate coincides with the axis of a barrel, one end of the end flange cross gate is communicated with the vertical cross gate, and the other end of the end flange cross gate exceeds the flange end face. A plurality of end flange ingates are arranged in inner cavities of the flanges at the two ends of the casting barrel and communicated with the end flange cross gates. The pouring system ensures that a molten aluminum mold filling temperature field is uniform and solidification feeding is good, and the inherent quality of produced castings is good. The mould is prevented from being scalded; and in the mold closing and pouring processes, the problem that the sand sleeve slides out to cause the casting to be lack of meat is avoided.

The invention discloses a composite material ship body forming method in the technical field of composite material ship body forming. The composite material ship body forming method comprises the following steps that demolding cloth is laid after a mold is pretreated; cutting and drying the fiber cloth sheet according to strength analysis; laying layers in a staggered manner and embedding a reinforcing structure; a diversion system is arranged according to a partition gradient diversion strategy; a double-layer vacuum bag is used for nesting and sealing; and performing relay glue injection at multiple glue injection points, sequentially injecting glue from the middle part to the two sides, and maintaining negative pressure. The resin pouring quality and the production efficiency are improved through an improved pipe distribution mode, a multi-point distributed pipe distribution system is combined with a dynamic glue injection strategy, uniform flowing distribution of resin in a mold is achieved, the common phenomenon of local resin accumulation or insufficient infiltration in a traditional process is eliminated, the consistency of product performance is improved, and the production cost is reduced. The resin flow path is accurately guided, bubble residues are reduced, the resin flow speed is controlled, the mold filling time is shortened, and the resin dosage is regulated and controlled.

The invention relates to a titanium alloy component preparation method and device and a flow guide pipe radius confirmation method, and relates to the technical field of negative pressure suction casting. The titanium alloy component preparation method comprises the steps that raw materials are smelted in stages based on the preset smelting power P1 of the raw materials till the heating temperature reaches the preset pouring temperature T, carrying out heat preservation on the smelted raw materials; based on the smelting power P2 of the blocking piece, the blocking piece is smelted in a staged mode till the blocking piece is completely smelted within a preset time period; and negative pressure is applied to a mold, and negative pressure mold filling is conducted on the mold through the molten blocking piece material and the molten raw materials. By adopting the technical scheme, the technical problems of long mold filling time and serious heat loss existing in an existing casting mode of combining smelting and crucible tilting weighting can be solved.

The invention relates to the technical field of concrete electric poles, in particular to a steel rod tailing ultra-high-performance concrete electric pole and a manufacturing method thereof.The manufacturing method comprises the steps that S1, slag, fly ash and silicon powder are mixed and stirred at the rotating speed of 200-300 r / min for 15-20 min, and a needed mixture is prepared; s2, mixing the mixture obtained in the step S1 and the modified tailing sand according to the proportion of 1: 1, adding steel fibers, polyvinyl alcohol fibers, borax and a modified alkali activator, and uniformly mixing and stirring to obtain tailing concrete; s3, the prepared concrete is poured into an electric pole mold, the electric pole mold is put into a vibrating table to be vibrated for 3-5 min, after mold filling is completed, a test mold is cured for 20-24 h at the normal temperature and then demolded, a demolded test block is put into a curing box, curing is conducted for 7-8 days at the relative humidity of 85-90% and the room temperature of 15-25 DEG C, and the steel rod tailing ultra-high-performance concrete electric pole is obtained. Under the condition of normal-temperature maintenance, the refractory brick has excellent performances of relatively high compressive strength, simple manufacturing process, small environmental pollution, fire resistance, high temperature resistance and the like.

The invention belongs to the technical field of integrated die casting, and relates to an integrated die casting forming method and system based on multi-magnetic-field coupling. The method comprises the steps that S1, metal raw materials are subjected to smelting, degassing modification and deslagging standing, and a metal melt is obtained; s2, in the inert gas environment, electromagnetic stirring is conducted on the metal melt; s3, the mold is subjected to mold heating, heat preservation and pressure maintaining, vacuumizing and release agent spraying; s4, the metal melt is pressed into a mold cavity for mold filling and solidification, a coupling magnetic field is applied to the metal melt, and an integrated die casting is obtained; wherein the coupling magnetic field covers a mold cavity and is used for improving the flowability of a metal melt during mold filling, inhibiting turbulent flow and refining the structure of the metal melt after solidification; the coupling magnetic field comprises a direct-current magnetic field and a pulsed magnetic field, the direct-current magnetic field penetrates through the metal melt from bottom to top, and the pulsed magnetic field penetrates through the metal melt from the side of the mold cavity. By means of the method, the high-quality integrated die casting can be manufactured.

The invention belongs to the technical field of casting, and particularly relates to a pouring device and method capable of dynamically adjusting the position, flow and flow direction of a pouring gate, the pouring device comprises a pouring ladle, a casting mold and a pouring pipe, the upper end of the pouring pipe is arranged on the pouring ladle, and the lower end of the pouring pipe is inserted into a cavity in the casting mold; the multi-degree-of-freedom movement mechanism is connected with the pouring pipe and is used for regulating and controlling the position of the pouring pipe; the sprue opening and closing assembly is used for controlling the opening and closing state of the sprue; the lateral flow outlet opening and closing assembly is used for controlling the opening and closing state of the lateral flow outlet; according to the pouring device and method, the design difficulty of a pouring system and the casting mold preparation difficulty are simplified, the process yield of castings is increased, the mold filling state, the mold filling capacity and the solidification feeding effect of molten metal are optimized, and the casting quality is improved. And the quality of the casting is improved, the flexibility and controllability of the production process are improved, and fusion with other technologies is facilitated.

According to the parallel working type synthetic resin in-mold expansion foaming batch forming device and method, the three procedures of mold filling of raw materials, steam foaming work and product cooling and taking out are independent of one another, work in parallel and do not interfere with one another, continuous production is achieved, the time fault tolerance is greatly improved, the single-piece production period is effectively shortened, and the production efficiency is improved. The overall production efficiency is improved; after the steam tank is started to work, the steam tank is continuously used and continuously keeps a hot state, so that the consumption of steam can be effectively reduced, and the carbon reduction performance of energy is outstanding; the surface of the upper mold and the surface of the lower mold are additionally provided with air holes which are widely and comprehensively covered, venting plugs which stop raw material foaming particles from passing but can allow water vapor to pass are additionally arranged in the air holes, the radiating surface of the water vapor in a mold cavity is increased, each raw material foaming particle is considered, and the water vapor penetrates through each particle gap, so that heating is more uniform; the foaming particle size is consistent, the density is uniform, the mechanical property is greatly improved, and the appearance quality is excellent.

The invention relates to the technical field of bearing manufacturing, in particular to a copper retainer die-casting process which comprises the following steps: firstly, mixing electrolytic copper, tin and zinc with rare earth yttrium, nano silicon carbide and graphene nanosheets, and performing vacuum melting and degassing to prepare a composite alloy; the mold is subjected to laser cladding and supersonic spraying to form a gradient coating; the alloy melt is subjected to high-speed mold filling under ultrasonic vibration, and pulse pressure is applied for pressure maintaining; gradient cooling is conducted after forming, and then two-step aging and pressure stress treatment are conducted; and finally, surface nanocrystallization treatment is carried out through ion implantation and ultrasonic shot blasting, and the performance is improved. The material utilization rate is increased to be larger than or equal to 92%, energy consumption is reduced, the tensile strength of the product is larger than or equal to 400 MPa, abrasion resistance is improved, the size precision is high, and the method is environmentally friendly and suitable for high-end bearing manufacturing.

The invention belongs to the field of aero-engines, and discloses a low-pressure casting process design method for a fuel regulator and the fuel regulator. According to the method, modeling is conducted on the fuel regulator to obtain a three-dimensional model of the fuel regulator; based on the three-dimensional model of the fuel regulator, numerical simulation is conducted on the liquid lifting, mold filling and cooling solidification processes of the casting to predict metallurgical defects of the casting, the metallurgical defects of the casting are analyzed, and a simulation result is obtained; and optimizing low-pressure casting process parameters or / and a process based on an analog simulation result to finally obtain a low-pressure casting process optimization scheme of the fuel regulator. By adopting the method, the forming quality of the complex casting is improved, the blindness of trial-manufacturing depending on experience in the traditional process is reduced, and the product percent of pass is improved while the research and development period is shortened; and the cost loss caused by defect repair is greatly reduced, and a systematic process guarantee is provided for efficient and precise manufacturing of the aero-engine fuel regulator.

The invention discloses a method for improving tiger wrinkle defects of a polypropylene composite material injection molding product. The method comprises the following steps: firstly, melting and plasticizing a blended polypropylene composite material, and then applying a rotation and reciprocating oscillation composite shearing external field on a plasticized blend melt to carry out disentanglement treatment on the plasticized blend melt, the low-entanglement-degree polypropylene composite material is subjected to injection molding to obtain a workpiece with obviously improved tiger skin patterns on the surface. According to the method disclosed by the invention, a shearing external field compounded by rotation and reciprocating oscillation is applied to a blend melt to destroy an entanglement network of a molecular chain, so that not only is the molecular chain effectively disentangled, but also a low-entanglement state is retained in granules, the viscosity of the melt is greatly reduced during subsequent injection molding, and the flowability is remarkably enhanced; and the occurrence of unstable flow in the mold filling process is delayed, so that the tiger skin defect on the surface of a polypropylene composite material injection molding product can be greatly improved on the premise that the good mechanical property of the product can be maintained.

The invention relates to the technical field of resonant pouring castings, in particular to a method for improving the homogeneity of castings in all directions based on resonant pouring, which comprises the following steps: preparing a mold / casting mold, setting resonant parameters, pouring molten metal, maintaining resonance and solidifying, and detecting the homogeneity. Through the resonance effect, molten metal mold filling is uniform, the size qualification rate is increased, meanwhile, grain refinement can be promoted, the isotropic performance uniformity and stability of a casting are remarkably improved, the internal defect rate is greatly reduced, the comprehensive yield is increased, and energy consumption and cost are reduced.

The invention relates to the technical field of process control, in particular to an injection molding process optimization method and device, computer equipment and a storage medium, and the method comprises the following steps: obtaining stress signals of four tie bars of an injection molding machine, calculating a total mold locking force, and preprocessing the stress signals through temperature compensation and moving average filtering; real-time mold cavity pressure is calculated based on a mold filling stage linear model, a pressure maintaining stage quadratic function model and a cooling stage exponential attenuation model triggered by an injection molding machine control signal; generating a standard curve template with a confidence interval according to the characteristic parameters of the qualified sample, and dynamically updating the standard curve template; and comparing the current pressure curve with a standard template output quality judgment result in real time, and triggering automatic parameter adjustment to form closed-loop control. The device and the method have the effect of solving the problems of high cost, poor compatibility and difficulty in maintenance when the pressure of the die cavity is directly measured.

The invention relates to the technical field of cement mortar test mold automatic forming equipment, and discloses a cement mortar test mold automatic forming production line. Comprising a cement mortar test mold automatic forming equipment system, a cement mortar test mold automatic robot curing box equipment system, a cement mortar test mold automatic demolding and demolding equipment system, a cement mortar test mold automatic test mold cleaning equipment system and a cement mortar test mold automatic mold filling equipment system. The cement mortar test mold automatic molding equipment system is used for completing molding of a cement mortar test block in the assembled test mold to form a molded test mold; the cement mortar test mold automatic robot curing box equipment system is used for curing a forming test mold; the automatic forming production line for the cement mortar test mold solves the problems that an existing cement mortar test mold is low in efficiency, unstable in quality, large in labor intensity and large in test mold loss during manual operation from assembling, forming, mold stripping to cleaning.

The invention relates to the technical field of magnesium-aluminum alloy casting, and discloses a magnesium-aluminum alloy high-pressure casting rapid cooling and defect inhibition process which comprises the following steps: S1, mold preheating; s2, nitrogen replacement is conducted; S3, a release agent is sprayed to the interior of the cavity under the inert atmosphere; s4, magnesium-aluminum alloy molten metal with the temperature ranging from 650 DEG C to 700 DEG C is pressed into the cavity at the injection specific pressure ranging from 80 MPa to 120 MPa and the mold filling speed ranging from 5 m / s to 8 m / s; s5, a subarea cooling structure is designed based on the wall thickness difference of different areas of the casting, gradient cooling is conducted on the casting, in the cooling process, the hot train risk is judged by calculating a thermal stress value, and cooling medium parameters are regulated and controlled by calculating a cooling rate value; and S6, the casting is taken out. Traditional cooling is changed into a partition gradient type, defects are controlled according to a formula and AI, double-pipeline nitrogen is used for preventing oxidation, cost is reduced, and technical practicability and innovation are improved.

The invention relates to the technical field of mold temperature optimization design, and discloses a mold temperature optimization design method for a VARI process mold filling stage. The method comprises the following steps: establishing a mathematical model containing resin viscosity, curing reaction and an energy equation; establishing a finite element model based on the geometric dimension of the part; setting the initial temperature of the mold to be the room temperature of 25 DEG C, and tracking the viscosity and curing degree change; obtaining low viscosity time and gelation time of the resin; calculating the mold filling time and comparing the mold filling time with the former two; and judging whether the current temperature meets the condition that the mold filling time is less than two key times, and if not, adjusting the temperature and repeatedly calculating. According to the method, the mathematical model comprehensively considering the dynamic factors is established, and the numerical simulation and optimization algorithm is combined, so that rapid optimization design of the mold temperature of workpieces with different shapes and sizes is realized, and the success rate of the VARI process and the quality of the workpieces are improved.

The invention relates to the technical field of forming casting equipment, in particular to metal impeller forming casting equipment which comprises a low-pressure casting machine body and a crucible, the crucible is arranged under the low-pressure casting machine body, and a casting mold is arranged at the upper end of the low-pressure casting machine body. By the adoption of the bottom-to-top mold filling process, pressurizing feeding of a casting in the solidification process can be achieved, the casting quality is improved, the structure of the liquid rising pipe is optimally designed, uniform mold filling of molten metal during casting is guaranteed, meanwhile, the backflow resistance of the molten metal in the liquid rising pipe can be improved, and impact on the bottom of a crucible due to direct falling of the molten metal is avoided; and the auxiliary cleaning mechanism and the casting mold filling mechanism are matched with each other, so that impurities at the bottom of the crucible are effectively cleaned, meanwhile, the inner wall of the bottom side of the riser tube can be self-cleaned, the impurities are prevented from being mixed into a casting mold, and the quality and efficiency of metal impeller forming casting are further improved.

The invention discloses a high-toughness heat-treatment-free aluminum alloy and a preparation method thereof, and belongs to the technical field of heat-treatment-free aluminum alloy materials. The high-toughness heat-treatment-free aluminum alloy provided by the invention is good in fluidity, can solve the problems of poor mold filling and poor far-end mechanical property of a large integrated die-casting structural part, and has high tolerance to Fe. The aluminum in the alloy can all take recycled aluminum as a raw material, the maximum tensile strength of the obtained aluminum alloy die-casting F-state mechanical properties can reach 320 MPa, the maximum yield strength can reach 167 MPa, the maximum percentage elongation after fracture is 17.6%, the maximum fluidity test result is 1150 mm, and the maximum bending angle is 41.6 degrees. Compared with primary aluminum, carbon emission is reduced by 98.6% with the secondary aluminum as the raw material, the manufacturing cost is remarkably reduced, and the aluminum alloy is more suitable for the development target of long-term application of green low-carbon aluminum alloy in the future.

The utility model discloses a low-pressure casting device for a direct mold filling flywheel casing, and belongs to the technical field of casting of automobile parts. A low-pressure casting device for a direct mold filling flywheel casing comprises a mold piece composed of a lower mold, a side mold and an upper mold, a mold core is arranged in the mold, a mold cavity is formed among the mold core, the lower mold, the side mold and the upper mold, and the low-pressure casting device further comprises a transition connecting device arranged on the lower mold. The transition connecting device is provided with a liquid inlet, a transition cavity and at least two groups of sprue gates, and the transition cavity is communicated with the mold cavity through the sprue gates; according to the utility model, through the arrangement of the transition connecting device, a pouring channel is omitted, a product is directly molded by pouring, solution materials in the pouring gate are saved, and the yield of the product is improved.

The invention relates to the technical field of evanescent mode casting, and discloses an evanescent mode casting process which comprises the following steps: adopting a closed pouring system; setting a pouring temperature; a bottom pouring type pouring system is adopted; a furan resin self-hardening sand core is embedded in the part difficult to fill sand, after a process hole with the diameter smaller than or equal to 50 mm is formed, filling is conducted through an EPS block, sealing is conducted through a high-temperature-resistant adhesive tape, and compaction is assisted through vibration compaction equipment during sand filling; through multi-process collaborative optimization, a full-process controllable lost foam casting system is constructed, the casting density is improved compared with a traditional process, and the tensile strength is improved; the rejection rate is greatly reduced, and the production cycle is obviously shortened; and the dry sand recycling rate is high, and the comprehensive cost is reduced. According to the technical scheme, the problems of discontinuous mold filling, gas retention, dry sand collapse and the like in lost foam casting are solved, and a standardized solution is provided for industrial production of high-end castings.

The utility model discloses a die filling trolley which comprises a machine frame, a motor is fixedly assembled on one side of the upper end of the bottom face of the machine frame, the motor is connected with a driving chain wheel through a speed reducer, the outer wall of the driving chain wheel is connected with a chain in a meshed and sleeved mode, and a tensioning structure is assembled on the other side of the upper end of the bottom face of the machine frame. The chain is connected to the outer wall of the tensioning structure in a meshed and sleeved mode, a plurality of riding wheels are symmetrically assembled at the upper end of the machine frame twice, a plurality of side wheels are symmetrically assembled on the two sides of the upper end of the machine frame and located on the outer sides of the riding wheels, and a hook structure is fixedly assembled at the upper end of the chain. Supporting legs and fixing pin seats are assembled on the two sides of the lower end of the rack correspondingly, through the effect of a hanging structure, mold filling materials can be hung conveniently, meanwhile, the using length of the mold filling device can be adjusted according to needs, and it is guaranteed that the application range is wide, and practicability is high.

Methods and apparatus for artificial bird manufacturing in impact testing is described herein. An apparatus to generate an artificial bird for impact testing includes a mold generator to form a mold based on a bird class identification, a mold filler to fill the mold with a first layer of crushed ice and a second layer of crushed ice, a compressor to compress an ice surface of at least one of the first layer or the second layer of the crushed ice to form indentations on the ice surface, and a freezer to re-freeze the crushed ice layers inside the mold to form an artificial bird.

The invention relates to a mould filling machine (11) for shaping and filling a plastics container (13) with a liquid in a blow mould (15) via a filling opening (19). The plastics container (13) has, in the region of the filling opening (19), retaining elements (20) for attaching a closure. The mould filling machine (11) comprises one or more blow moulds (15), which can be closed and opened in order to be able to remove therefrom the liquid-filled plastics container (13) formed in the blow mould (15), and a first closure device (21) having a plurality of first closures (23), which first closure device (21) applies a first closure (23) to the filling opening (19) of each liquid-filled container (13). The first closure is a stopper (23) which can be inserted into the filling opening (19) and can be clampingly fixed in the filling opening without interacting with the holding elements (20).

The invention relates to the technical field of concrete filling, in particular to a self-propelled concrete strip-shaped mold filling device and a filling method thereof.The self-propelled concrete strip-shaped mold filling device comprises a driving assembly, a feeding assembly used for conveying concrete is arranged on the driving assembly, and a transverse moving assembly used for driving the feeding assembly to horizontally move left and right is arranged below the driving assembly; support assemblies are symmetrically arranged on the left and right sides of the driving assembly. According to the device, by arranging the transverse moving assembly, when self-walking filling is conducted along the strip-shaped mold, left-right sliding can be conducted, the filling range is widened, meanwhile, the filling uniformity is improved, and then the filling quality is improved; by arranging the feeding assembly, a vibrating plate can be driven to vibrate continuously, gas in the cement mortar is reduced, and the filling quality is further improved; in addition, by arranging the support assembly, the filling height can be increased along with filling, and the situation that due to the fact that the initial height is too high, coarse aggregate and fine aggregate in filled cement mortar are not evenly distributed, and the filling quality is affected is avoided.

The invention relates to the field of casting, in particular to a mounting structure of a riser exothermic agent and a mounting method thereof. The mounting structure of the riser exothermic agent comprises a hanging support, the exothermic agent and cloth, the hanging support is used for hanging and supporting a riser exothermic cloth bag, the exothermic agent is used for increasing the temperature of a riser during casting, the cloth wraps the exothermic agent, and the hanging support comprises an adjusting rod, a movable sleeve, a supporting rod, a connector and a hook. The left side and the right side of the connector are each provided with an adjusting rod, and one end of each adjusting rod is fixed into the connector. According to the mounting structure and the mounting method of the riser exothermic agent, the mounting structure is formed by combining materials such as the hanging bracket and the cloth, the exothermic agent with a proper dosage needs to be selected according to the actual riser specification during use, the device is arranged at the riser in advance, the temperature of the riser can be increased, the feeding time of the riser can be prolonged in the pouring and mold filling process, and the production efficiency is improved. The feeding efficiency is improved, so that the casting quality is optimized, and the production cost is reduced.

Method for producing a thermally conductive film (10), comprising: a first step of forming a film or block by pressing and / or rolling a mixture of a binder resin (14) and a first thermally conductive filler (15) with shape anisotropy, which has a plate shape and a main surface thereof or a needle shape and a longitudinal direction thereof, such that the first thermally conductive filler (15) is oriented in a direction of the main surface of the film or block; a second step of hardening the binder resin (14) and then cutting the film or block in one direction of thickness to obtain mold filler pieces (12) such that the first thermally conductive filler (15) in each of them is oriented in the thickness direction of the corresponding mold filler pieces (12); and a third step of mixing the mold-filler pieces (12), a matrix resin (11) and a second thermally conductive filler (13), forming the mixture into a foil mold using pressure rollers, and then hardening the matrix resin (11); wherein the thermally conductive film (10) contains the first thermally conductive filler (15) with its main surface aligned in a thickness direction of the thermally conductive film (10), if the first thermally conductive filler (15) has a plate shape; or else wherein the thermally conductive film (10) contains the first thermally conductive filler (15) with its longitudinal direction aligned in the thickness direction of the thermally conductive film (10), if the first thermally conductive filler (15) has a needle shape, and wherein the matrix resin (11) and the binder resin (14) can be cured by an addition reaction using a platinum group metal catalyst, and wherein the second thermally conductive filler (13) consists of inorganic particles, and the inorganic particles are coated with an R(CH3) a Si(OR') 3-a expressed alkoxysilane compound are surface-treated, wherein R represents a substituted or unsubstituted organic group with 1 to 20 carbon atoms, R' represents an alkyl group with 1 to 4 carbon atoms, and a is 0 or 1.

The invention relates to a sand mold exhaust top box and method for magnesium-lithium alloy low-overheating and overpressure rapid mold filling, and belongs to the technical field of magnesium-lithium alloy casting. Comprising an exhaust unit, a low-pressure transition tank, a sucking pump and an exhaust pipe which are sequentially connected, the low-pressure transition tank is used for balancing pressure during exhausting and preventing smoke dust from being accumulated in the sucking pump; the exhaust unit comprises an exhaust floater, a guide pipe and a valve; the exhaust floater is connected with the low-pressure transition tank through a guide pipe, and a valve is installed on the guide pipe. The exhaust floater is used for exhausting gas and preventing the solution from overflowing after exhaust gas is exhausted. The combined sand mold exhaust top box is adopted to regulate and control the mold filling back pressure of the mold cavity, gas in the mold cavity is rapidly exhausted, and it is ensured that the mold cavity is rapidly filled with melt in the overpressure state.

The utility model relates to the technical field of exhaust of injection molds, in particular to an injection exhaust system and a mold, the injection exhaust system comprises an exhaust cavity and an exhaust assembly, and a first exhaust channel and a second exhaust channel are formed in the exhaust assembly. The two ends of the first exhaust channel and the two ends of the second exhaust channel communicate with the outside and the top of the cavity correspondingly, and the exhaust assembly is slidably connected into the exhaust cavity so that the first exhaust channel can be opened or closed. The exhaust assembly can adjust the sliding position in a self-adaptive mode according to the exhaust requirement in the mold filling process, the exhaust effect is good, and melt forming is not interfered.

The invention discloses a mold coating and a casting mold, relates to the technical field of casting manufacturing, and discloses the mold coating which comprises a demolding layer, the surface of the demolding layer has a pore structure; the metal melt is in a Cassie-Baxter state under the condition that the demolding layer is in contact with the metal melt and the pressure applied to the metal melt is smaller than preset critical pressure; and under the conditions that the demolding layer is in contact with the metal melt and the pressure applied to the metal melt is greater than or equal to the critical pressure, the metal melt is in a Wenzel state. According to the mold coating, staged dynamic thermal control can be achieved, efficient heat insulation is provided in the initial stage of mold filling so as to guarantee the fluidity, meanwhile, rapid heat conduction is achieved in the solidification stage so as to promote densification, and then the casting quality can be improved.

The invention discloses a process for producing high-performance cast balls on a V-method production line, which comprises an electric heating box, an air exhaust sand box, a vacuum air exhaust pipeline, a cast ball model, a jolt rammer, a negative pressure box, a sand storage tank and a hydraulic system, the hydraulic system is associated with the electric heating box, and the vacuum air exhaust pipeline is communicated with the air exhaust sand box. The vacuum-pumping V-method production line technology is adopted, the air exhaust sand box is matched with the ball casting model and the model plate to generate negative pressure, molten iron mold filling is smoother, internal casting defects are reduced, meanwhile, only a vacuum pump and a sand storage tank need to be additionally arranged on the V-method production line, equipment is simple and convenient to maintain, and production efficiency is improved. The rectangular plate B on the air exhaust sand box and the rectangular plate A on the model plate are in butt joint and are matched with the sealing embedded blocks to be inserted into the rectangular embedded grooves for positioning, dismounting, replacing and overhauling are convenient, efficient vibration reduction is provided for the vibration compactor through cooperation of the hydraulic buffer rods and the buffer springs and the rubber air bag buffers, and the vibration reduction performance and the vibration compaction effect are improved.

The negative pressure drainage auxiliary forming device comprises a mold (1), the mold (1) comprises a male mold (2) and a female mold (3), the side portion of the female mold (3) is provided with a negative pressure pipe (4) communicated with an inner cavity of the female mold (3), a fixing frame (5) is arranged beside the female mold (3), guide rods (6) are symmetrically arranged on the fixing frame (5), and sliding seats (7) are arranged on the guide rods (6); a carry air cylinder (8) is arranged at the bottom of the fixing frame (5), and the extending end of the carry air cylinder (8) is connected with one end of the sliding seat (7); and an exhaust pipe group (9) is arranged in the sliding seat (7). Express butt joint and separation of the mold and the negative pressure pipeline can be achieved, the disassembly and assembly process of the device is simplified, and the overall production efficiency is effectively improved.