175 results about "Lost-foam casting" patented technology

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 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.

The invention relates to the technical field of casting devices, and particularly discloses a pump valve casting casting demolding device which comprises a recycling box, a cross beam is fixedly arranged on the recycling box, the cross beam is close to the middle, a bearing structure is fixedly arranged on the cross beam, and a limiting structure is fixedly arranged on the bearing structure. A loading unit is detachably mounted on the bearing structure, the loading unit is fixed through a limiting structure, and a separating structure is detachably mounted on the limiting structure. Through the sealing fit design of the loading unit and the precise pushing design of the separating structure, molding sand is automatically scattered and recycled after the box bottom and the pouring jacket are separated; the casting is stably moved out through directional pushing of the push plate, and the problem that the casting is difficult to take out in the lost foam casting process is thoroughly solved.

An evanescent mode drying device for casting part production comprises a drying chamber, multiple layers of goods shelves are arranged in the drying chamber, a module feeding assembly is further arranged in the drying chamber, one side of the drying chamber is connected with a drying assembly, and the module feeding assembly comprises an X-axis lead screw mechanism, a Z-axis lead screw mechanism, an electric cylinder and a pneumatic adsorption mechanism; according to the device, automatic batch storage and drying work of the modules can be achieved, manual feeding and discharging of workers are not needed, the working efficiency of production operation of the lost foam castings can be effectively improved, and meanwhile the labor intensity of the workers is reduced.

The utility model relates to the technical field of casting, in particular to a vacuum negative pressure device for lost foam casting. According to the technical scheme, the device comprises a mounting bottom plate, a vacuum pump is arranged above the mounting bottom plate, a pressure stabilizing assembly is arranged at the position, located on the mounting bottom plate, of the air inlet end of the vacuum pump, a filtering assembly is arranged on one side of the pressure stabilizing assembly, a negative pressure pipe is arranged on a connecting pipe, and a vacuum distribution mechanism is arranged at the end, away from the connecting pipe, of the negative pressure pipe. The filtering assembly adopts a multi-layer composite filtering structure, so that impurities in gas can be efficiently removed, meanwhile, the system pressure can be monitored and adjusted in real time through an intelligent central controller in the pressure stabilizing assembly, pressure fluctuation is effectively buffered, a stable negative pressure environment is provided for lost foam casting, and the production efficiency is improved. And meanwhile, the vacuum distribution mechanism is designed in a modularized mode, negative pressure distribution can be accurately controlled according to different production requirements, the air exhaust efficiency is improved, and the production efficiency of lost foam casting and the precision of castings can be improved.

The lost foam casting equipment comprises a functional box and a collecting box which communicate with each other, the collecting box is located below the functional box, a grid supporting plate is arranged between the collecting box and the functional box, and the collecting box is slidably connected with a base in the horizontal direction; a vibration assembly used for driving the collecting box and the functional box to reciprocate in the horizontal direction is arranged on the base, a first supporting plate used for containing a sand mold is arranged in the functional box, the first supporting plate is slidably connected with the functional box in the vertical direction, and a box plate is arranged on the box wall of the functional box. According to the lost foam casting equipment, the processes of mold placing, sand filling, pouring and sand shakeout of lost foam casting can be achieved, the first supporting plate and the box plate in the functional box can be combined to form a sand box, the sand box can implement the steps of mold placing, sand filling and sealing shaping, a sand mold is obtained, and after pouring is completed, the first supporting plate is separated from the box plate; and the sand mold on the first supporting plate can be moved to the bottom of the function box for vibration shakeout, and integrated casting is achieved.

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 present application relates to the technical field of special functional coating materials for lost foam casting, and specifically discloses a special coating for large machine tool castings, and application and use method thereof. The present application synergistically strengthens full-temperature-range functional composite materials and composite aggregates, and uses mullite for high-temperature strengthening. Temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance. Lithium feldspar as a thermal expansion adaptive fluxing agent is more conducive to the medium-temperature healing and thermal expansion adjustment of the coating system. Composite reinforcing fibers are used to enhance and toughen the thick and large workpiece with large thermal stress. Boron-containing glazing agent as an ultralow-temperature glazing agent can form an initial liquid phase at about 450 DEG C, seal the surface of the coating, and purify the air passage. Rare earth oxides as high-temperature phase stabilizers can be solid-solved in the mullite lattice, improve the high-temperature phase stability, and refine the ceramic nodes. Through raw material design, the coating system has improved ultrahigh strength and crack resistance at extreme high temperatures under the premise of ensuring moderate air permeability.

The invention relates to the technical field of full mold casting, and provides a lost foam casting method for a thin lower mold insert type casting, which comprises the following steps of: firstly, processing a foam model, and carrying out quantity increasing, hole processing and connecting rib adding on the foam model to prevent the defects of deformation and shrinkage porosity of a shrinkage cavity; then the model is placed on an anti-deformation support which is provided with a check block and has the thickness of 50-100 mm, and deformation generated in the molding sand burying process is avoided; then a bottom pouring type pouring system is arranged, one inner pouring gate is arranged at the thin position of the model, the inner pouring gate keeps away from the drilling position, a straight pouring gate is arranged at the end, and it is guaranteed that molten iron is rapidly and stably filled into the model; then, CAE simulation is carried out, defects are eliminated, positions where shrinkage cavities and shrinkage porosity possibly occur are positioned, sand isolation chillers and inner chillers are arranged, the chilling effect is enhanced, and shrinkage cavities and shrinkage porosity are avoided; then carrying out shower coating operation, drying and then reinforcing; then modeling is conducted, and pouring is conducted after modeling; and then stress relief annealing is carried out, and finally shot blasting is carried out to remove redundant paste.

The invention discloses a special evanescent mode casting coating for castings and a preparation method thereof, and relates to the technical field of evanescent mode casting paints.The special evanescent mode casting coating for the castings is prepared from 80-86 parts of refractory aggregate, 5-7 parts of bio-based composite binder, 2.5-4 parts of composite suspension, 0.4-0.6 part of dispersing aid and 0.3-0.4 part of coupling agent. 6 to 12 parts of deionized water; the invention discloses a preparation method of a special lost foam casting coating for castings. The method comprises the following steps: S1, premixing dry materials; s2, preparing a liquid phase; s3, mixing and dispersing; s4, performing vacuum defoaming; s5, ultrasonic treatment; and S6, quality detection. According to the lost foam casting coating special for the casting and the preparation method of the lost foam casting coating, in the preparation process, bauxite, quartz powder and bauxite are matched according to the proportion of 9: 1 and then graded in a gradient mode according to the proportion of 3: 5: 2, the coating forms a double-layer structure with a compact surface layer and a porous inner layer through gradient grading, the surface layer is resistant to sand burning and molten metal scouring, and the inner layer rapidly exhausts steam; therefore, the requirements of sand adhesion prevention, ventilation and steam exhaust are met.

The invention relates to the technical field of lost foam casting and pouring, in particular to an integrated lost foam casting and pouring device and a working method thereof.The integrated lost foam casting and pouring device comprises a pouring mechanism, a mold mechanism is arranged on the front side of the pouring mechanism, the pouring mechanism comprises a pouring bottom frame, and a pouring control assembly is arranged on the rear side of the top of the pouring bottom frame; by arranging the pouring mechanism and the mold mechanism, automatic and precise control over the integrated lost foam casting pouring process is achieved, the mold body can be precisely controlled to enter and exit from the pouring area through starting and reverse movement of an electric push rod, errors and instability caused by manual operation are avoided, and meanwhile the production efficiency is improved. The injection angle of the pouring nozzle can be automatically adjusted according to the position of the mold body, it is ensured that molten metal can be accurately injected into the mold, the casting precision and quality are greatly improved, and in addition, the device has the advantages of being compact in structure, easy and convenient to operate, safe, reliable and the like.

This utility model relates to the field of lost foam casting technology and discloses a lost foam casting device for automotive drive axle housings. It includes a base, a frame mounted above the base, a casting box fixedly connected to the inner wall of the frame, a sand outlet on the lower surface of the casting box, a recovery assembly below the sand outlet, and a filter assembly outside the base. The recovery assembly includes a baffle, a collection box, and a sieve plate. A first hinge seat is fixedly connected to the outer wall of the frame, and a second hinge seat is fixedly connected to the outer wall of the baffle. A hydraulic rod is rotatably connected to the inner wall of the first hinge seat, and the output end of the hydraulic rod is rotatably connected to the inner wall of the second hinge seat. In this utility model, after casting is completed, the baffle is opened and closed automatically via a hydraulic drive device, achieving automatic opening and closing of the sand outlet. The molding sand falls into the collection box through the sieve plate for initial screening. Coarse sand is directly recycled, while fine sand is separated through the sieve plate, improving the efficiency of old sand recycling and reducing labor intensity.

This invention discloses a lost foam casting mold for gearbox housings, relating to the field of intelligent casting technology. It includes a lower mold and an upper mold. An ejector assembly is installed inside the lower mold, comprising a telescopic cylinder mounted inside the lower mold. A movable seat is mounted on the telescopic cylinder, and a top seat is connected to the movable seat via a conveying pipe. The top seat is located inside a recess in the housing, and its top horizontal plane is flush with the bottom horizontal plane of the bearing seat hole in the housing recess. The conveying pipe is connected to an external air pump via a first pipe, and a through hole is provided on the outer side of the top seat. In this lost foam casting mold for gearbox housings, when the top seat moves upward, it slowly lifts the housing upward, achieving initial loosening and separation of the housing from the bottom of the housing recess. Gas flows along the gap between the housing and the housing recess, assisting in loosening and preventing scratches on the housing surface during demolding, thus ensuring the appearance quality of the housing.

The application relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a cast iron lost foam and universal coating for full mold casting and application thereof. The cast iron lost foam and universal coating for full mold casting comprises quartz powder, calcined bauxite, modified fly ash microbeads, microcrystalline graphite and an additive; the modified fly ash microbeads comprise fly ash and a composite coating layer coated on the surface of the fly ash, and the composite coating layer comprises aluminum oxide nanosheets and magnesium ion doped amorphous substances. Through functional design of key components, the coating can dynamically adjust its performance according to the temperature and chemical environment of the contact interface, can meet the high air permeability requirement of the lost foam process, can take into account the differentiated requirements of different cast iron materials on high-temperature strength, permeability resistance and interface purity, and can be compatible with both conventional negative pressure and non-negative pressure conditions, so that the universal coating is realized, and production management and supply chain processes are greatly simplified.

The utility model discloses an accessory structure for reducing casting deformation of an evanescent mode, which belongs to the technical field of evanescent mode casting equipment, and comprises a white mold, a plurality of support rods are arranged in the white mold, and the support rods are arranged on the support rods. The two ends of the supporting rod are fixedly connected with the center points of the long edge and the short edge in the mold white mold correspondingly, supporting blocks are arranged at the four corners of the bottom of the mold white mold correspondingly, anti-deformation cushion blocks are arranged at the bottoms of the two sides of the mold white mold correspondingly, and the supporting rod and an inner frame of the mold white mold form a triangular stable structure. The cross section of the supporting rod is arranged to be in an inverted trapezoid shape with the wide upper portion and the narrow lower portion, an accessory structure composed of the supporting rod, a supporting block and an anti-deformation cushion block can be additionally arranged, casting deformation is reduced or controlled, and the problems that a side confining blank holder mold is prone to deformation in the lost foam casting process, and the machining allowance in the prior art is large are solved.

The invention relates to the technical field of chaplets, and discloses a chaplet applied to an evanescent mode and a using method thereof.The chaplet comprises a main body unit, the main body unit comprises supporting plates, core rods are arranged on one side between the two supporting plates, an adjusting unit is arranged between the two core rods, and the adjusting unit comprises a first connecting plate arranged between the two core rods; a fixing plate is arranged on the top face of the first connecting plate on the lower side, a fixing assembly with the fixing function is arranged on the top face of the fixing plate, and an adjusting assembly with the covering area increasing function is arranged between the fixing plate and the fixing assembly and located in the fixing assembly. The structure has the beneficial effects that rapid and large-range adjustment can be achieved through mutual cooperation of the structures, so that the structure conforms to lost foam casting of more models, chaplets of various models and sizes do not need to be placed in a classified mode, workers can take and use the chaplets conveniently, the casting problem caused by incorrect models of the chaplets is solved, and the production efficiency is improved. Therefore, the success rate of lost foam casting is improved.

The invention relates to the technical field of evanescent mode casting models, and discloses evanescent mode manufacturing equipment which comprises a casting mold frame, a moving guide mechanism, a cooling box and a mold are arranged in the casting mold frame, and the moving guide mechanism is used for driving the cooling box and the mold to move; wherein the cooling box is located between the mold and the moving guide mechanism, when the cooling box is attached to the mold, the cooling box is used for cooling the mold, temperature transfer can be conducted between the cooling box and the mold, and the evanescent mode manufacturing technology comprises the steps that 1, the evanescent mode equipment is used for manufacturing an evanescent mode; 2, the cooling box is filled with a cooling medium; 3, the cooling box is attached to the mold, and the mold is cooled through the cooling box; and 4, the mold is moved for demolding, and the mold cooling device has the advantages that cooling liquid can evenly cool the mold, and meanwhile the cooling efficiency is high.

An evanescent mode casting smelting sand-washing-prevention pouring basin belongs to the technical field of casting and comprises a basin wall 10 and a basin bottom 20 which form a molten iron containing space, the basin bottom 20 is provided with a plurality of runners 21 capable of enabling molten iron to flow out, a refractory brick set is embedded in the basin bottom 20, the upper surface of the basin bottom 20 comprises a resin sand layer, and the refractory brick set is not lower than the resin sand layer. The inner surface of the basin wall 10 and / or the surface of the refractory brick set are / is coated with fireproof paint, the refractory brick set is located at the molten iron scouring position, and molten iron buffered by the refractory brick set flows to the runner 21 through the resin sand layer. Through double protection measures of brushing the alcohol-based coating on the inner side wall of the pouring basin and arranging the refractory bricks at the inner bottom of the pouring basin, the anti-scouring capability of the area is obviously enhanced, sand impurities are prevented from flowing into a cavity, the sand hole defect of a casting is reduced, and the finished product quality of the casting is obviously improved.

The application discloses a kind of automatic control methods of lost foam production line, it is related to the field of lost foam production, solve the technical problem that existing lost foam casting adjustment method change type advantage is small, flexibility is low and efficiency is low.The method is, set material number, the sand box on current process production line is assigned to the material number, and the material number is checked by material number circulation mistake-proof checking mechanism;When judging material number is normal value, then carry out material number circulation process;When process production line or sand box appears failure and needs to change material number, trigger material number temporary change mechanism;When sand box completes box turning action, the material number corresponding to sand box is output to subsequent process production line and the material number corresponding to sand box on current process production line is emptied.The application solves the technical problem that existing lost foam production line has no actual material number to track sand box, improves the flexibility and work efficiency of operation, reduces the probability of processing process problem.

The invention belongs to the technical field of evanescent mode casting, and particularly discloses an evanescent mode casting automatic bottom shakeout special sand box device which comprises a sand box body used for containing an evanescent mode and shakeout and used for evanescent mode casting. The transportation frame is placed at the bottom of the sand box body and used for driving the sand box body to move; the sand shakeout component comprises two turning plates, the number of the turning plates is two, the two turning plates are oppositely arranged, the outer side ends of the turning plates are rotationally connected with the inner rod in a sleeving mode, and the turning plates are located in the leakage groove. The sliding rod is fixed to the bottom of the turning plate. The inserting rods move at the bottoms of the sliding rods through movement of the pulling plates, the sliding rods are limited through the inserting rods with different heights, and therefore the inclination angle of the turning plate in the leakage groove is limited, simple sand shakeout of the sand box body is guaranteed, the speed of dry sand falling in the leakage groove and the through groove can be adjusted and controlled, and the production efficiency is improved. And the phenomenon that dry sand with high heat is scattered on the body of a worker due to the too high sand shakeout speed is avoided.

The utility model discloses a surface polishing device for an evanescent mode casting hammerhead, which comprises a workbench, the top of the workbench is fixedly connected with a support frame, the inside of the support frame is fixedly connected with a telescopic transverse column, one end of the telescopic transverse column is fixedly connected with a pressing plate, the bottom of the support frame is fixedly connected with a top motor, and the top motor is fixedly connected with a motor. An output shaft of the top motor is fixedly connected with a lifting top column through a coupler, the bottom end of the lifting top column is fixedly connected with a grinding disc, and the top of the workbench is fixedly connected with a limiting frame. Through the arrangement of the workbench, the supporting frame, the telescopic transverse column, the pressing plate, the top motor, the lifting top column, the polishing disc, the limiting frame, the transparent sliding window and the window handle, sputtering of sparks during polishing can be blocked. And the safety of the device during working is improved, the damage of the device to workers is avoided, the overall utilization rate of the device is improved, and different workers can operate the device conveniently.

The application discloses a kind of lost foam casting tail gas electric heating combustion processing device, air inlet pipeline, with the tail gas discharge port of lost foam casting production line is sealed connection by flange, for the treatment gas generated in casting process is transported to pretreatment module;While pipeline inner wall is equipped with anticorrosive coating and guide vane;Pretreatment module is connected with the outlet end of air inlet pipeline and the air inlet end of direct combustion module, for dust removal to treatment gas;Heat recovery module and the outlet end of direct combustion module and the air inlet end of deep treatment module are detachably connected by flange, for recovering high-temperature tail gas waste heat discharged by direct combustion module and realizing energy recycling.The application has the beneficial effects of ensuring gas emission, reducing heat exchange efficiency decay, reducing maintenance energy consumption, reducing dust deposition and pressure loss, prolonging equipment service life, low manufacturing cost, not easy to damage and simple maintenance operation.

The invention relates to the technical field of automobile hub die casting preparation, and provides an efficient-cooling high-crack-resistance automobile hub evanescent mode casting preparation process which comprises the following steps: step 1, bead pretreatment: EPS beads are pre-foamed in a pre-foaming device with the pressure of 0.04-0.05 MPa at the preheating temperature of 82-84 DEG C; step 2, forming a white mold, wherein a mold gap is kept to be 3.5-4.5 mm during mold closing; 3, gradient type white mold drying is conducted, specifically, drying is conducted for 6 hours under the conditions that the temperature is 38-42 DEG C and the humidity is 25-35% in the first stage, and drying is conducted for 10 hours under the conditions that the temperature is 43-47 DEG C and the humidity is 15-25% in the second stage; step 4, coating a composite coating; 5, preparing a sand mold; step 6, smelting and pouring; step 7, efficient cooling; and 8, post-treatment, including coating layer stripping, surface cleaning and stress elimination. Through collaborative optimization of whole-process technological parameters, the anti-cracking performance of the automobile hub lost foam casting is remarkably improved, and the problem of hot cracks caused by uneven cooling and insufficient coating performance in a traditional process is effectively solved.

The utility model relates to an evanescent mode full-mold casting small part pouring device which comprises a top pouring straight pouring gate, a main transverse pouring gate, an auxiliary transverse pouring gate and a filter. The two sides of the top pouring sprue are connected with main cross gates respectively, one side of each main cross gate is connected with a flow guide channel, each flow guide channel is connected with one end of a filter, the other end of the filter is connected with an auxiliary cross gate, and a gap is reserved between the auxiliary cross gate and the horizontal plane; and a plurality of small parts and corresponding flow gates are arranged at the bottom end of the other end of the auxiliary cross gate, so that the effect of intensively filtering the small parts is realized, and the cost is reduced while the quality is ensured. The inner pouring gate is arranged at the bottom end of the other end of the auxiliary cross gate, top pouring is achieved, and the filter between the flow guide channel and the auxiliary cross gate is matched, so that the temperature of upper-layer molten iron of a small piece is increased while molten metal is filtered, the gasification quality of the top of the small piece is guaranteed, the molten metal of the small piece is well filtered and purified, and the service life of the small piece is prolonged. And the internal quality of small parts is greatly improved.

The invention discloses a cooling integrated system for sand treatment of a lost foam casting production line, and relates to the technical field of sand treatment. Comprising a plurality of second supports, a heat exchange assembly is arranged above the second supports and comprises a heat exchange tank, the heat exchange tank is fixed to the second supports, a second feeding pipe is arranged above the heat exchange tank, a bottom plate and a top plate are fixed in the heat exchange tank, and a plurality of seamless steel pipes are arranged in the bottom plate and the top plate; a first lifting assembly and a second lifting assembly are fixed to the two sides of the heat exchange tank correspondingly and are the same in structure, a feeding assembly is arranged on the side face of the first lifting assembly, and a storage assembly is arranged on the side face of the second lifting assembly. Through the design of the three-bin type heat exchange tank, the seamless steel pipes are matched with the partition plates, so that the cooling efficiency is improved, the production efficiency is improved, the machining quality is guaranteed, and the equipment failure rate and the maintenance cost are reduced.

The present application relates to a kind of based on " V " method composite lost foam forming casting process and its application.The process is aimed at the defects of existing " V " method and lost foam casting process when producing 30-60kg castings, innovatively combines the two.First, specific specification EPS beads are selected to make white mold, after steam prefoaming, vulcanization bed drying and curing, with specific process parameters, steam heating type semi-automatic forming machine is formed.Then, using bauxite, bentonite and other materials to make 1 layer shell, the shell making cost is low, and can reduce labor intensity and material consumption.The drying temperature and time are determined by measuring the expansion and shrinkage curve of white mold.Finally, through " V " method sand casting and negative pressure pouring, the casting is obtained.This process integrates the advantages of two processes, solves the problems of traditional process, is suitable for automobile low alloy complex casting production, can also reduce pollution emission, and has good application prospect.

The invention provides a casting mold and a casting method for removing smoke in an evanescent mode box, the casting mold comprises an evanescent mode casting sample, the evanescent mode casting sample is provided with a plurality of smoke suction cups at intervals along the extension direction of the evanescent mode casting sample, and the outer wall of each smoke suction cup is provided with a blank area; except the blank area, coating layers are sprayed on the outer surfaces of the full mold casting sample and the smoke suction cup; the casting method comprises the following steps: step S01, preparing a full sample of the lost foam casting; according to the shape and the size of an actual casting, a proper number of smoke suction cups are selected, the positions of the smoke suction cups are reasonably arranged, and then an evanescent mode casting sample is manufactured; spraying a coating layer on the outer surface of the full mold casting sample and the outer surface of the smoke suction cup except the blank area on the smoke suction cup; according to the casting mold and the casting method for removing the smoke dust in the evanescent mode box, the structure is simple, operation is easy and convenient, gas and smoke dust generated by gasification of a full sample of an evanescent mode casting can be well removed, and the casting quality is good.

The utility model belongs to the field of lost foam casting technology relates to a kind of polishing device for metal lost foam casting production, it includes: hand-held part, angle adjusting mechanism, connecting part, power part, rotating part and polishing head;The lower part of the hand-held part is connected with the upper part of the connecting part by the angle adjusting mechanism, and the angle adjusting mechanism is used to adjust the relative angle of the hand-held part and the connecting part;The bottom of the connecting part is connected with the power part, and the power part is connected with the top of the rotating part, for driving the rotating part rotates;The bottom of the rotating part is equipped with the polishing head.The utility model sets up series hand-held part, angle adjusting mechanism, connecting part, power part, rotating part and polishing head, wherein, rotating part is set as strip, and polishing head can be driven to extend into pump shell, turbine shell body and other narrow inner cavity when polishing, and the coating or burr in inner cavity is polished, significantly improve the cleaning quality of lost foam casting inner cavity surface.

The invention belongs to the technical field of casting, and provides an investment casting process of a martensitic stainless steel material part, according to the investment casting process of the martensitic stainless steel material part, through introduction of silicon carbide and metamorphism of a rare earth ferrosilicon alloy, the thermal expansion coefficient of steel is reduced, and the performance of the martensitic stainless steel part is improved. And meanwhile, structure grains in the martensitic stainless steel solidification process are remarkably refined, formation of thick and large matrix structures is reduced, and therefore internal stress generated in the casting solidification stage is reduced. And meanwhile, the plasticity and toughness of the material can be improved through the refined crystal grains, the adaptive capacity of the casting to martensite transformation volume change in the subsequent heat treatment process is enhanced, accumulation of internal stress is relieved, and finally cracks are effectively restrained. Compared with existing schemes such as casting temperature optimization and shell deformability adjustment, the process improves the material performance from the structure level through modification treatment, the anti-cracking capacity of the casting can be fundamentally improved, meanwhile, the size precision and the mechanical property of the casting are considered, and the bottleneck of the prior art is broken through.

The utility model relates to the technical field of coating stirring machines, in particular to a coating stirring machine for lost foam casting, which comprises a mounting component, a screw rod is arranged on the inner wall of the mounting component, a knob is fixedly connected to the top end of the screw rod, and a lifting sliding block is in threaded connection with the outer wall of the screw rod. Adjusting supporting rods are rotationally connected to the two ends of the lifting sliding block, a sliding block is rotationally connected to the bottom end of each adjusting supporting rod, a limiting sliding groove is formed in the connecting position of the mounting assembly and the sliding block, a connecting frame is fixedly connected to the outer wall of the sliding block, and the stirring assembly is located above the stirring barrel. The rotary knob rotates to drive the lifting sliding block to vertically slide through the screw rod, the lifting sliding block drives the sliding block to slide in the limiting sliding groove through the adjusting supporting rod, the sliding block slides to drive the mounting block at one end of the connecting frame to be tightly attached to the outer wall of the stirring barrel, and the mounting block is in an arc shape. The stirring barrel is prevented from shaking and even toppling over when the coating is stirred.