1218 results about "Molding sand" patented technology

The invention relates to the technical field of casting equipment, in particular to a casting device for pump valve casting production, which comprises a conveying rack, a mold frame mounted on the conveying rack, and a sand injection station, the sand injection station comprises a mounting frame, a sand discharging mechanism mounted on the mounting frame and a tamping mechanism for tamping molding sand. According to the casting device for pump valve casting production, by arranging the discharging mechanism, when a motor drives a discharging roller to discharge materials in a feeding hopper, a screening disc can be synchronously driven to move up and down, and discharged molding sand is screened; meanwhile, when the molding sand falls on the screen, the middle of the screen is raised, so that the molding sand is more uniformly distributed in the mold frame; and meanwhile, the materials in the mold frame are preliminarily hammered and tamped.

The invention discloses a casting density optimization system and method based on cooperative regulation and control of molding sand moisture and clay blue absorption amount, and relates to the technical field of casting control. According to the method, a self-cleaning wear-resistant alloy probe is used for synchronously collecting a molding sand high-frequency eddy current signal and a multi-spectrum near-infrared signal in the sand mixing process; inputting a pre-training support vector machine regression signal fusion model to obtain a real-time moisture content and a clay blue absorption amount; a preset density target threshold value is combined, a density-molding sand parameter association database is inquired to determine a parameter target interval, a regulation and control instruction is generated after a deviation value is calculated, and a water adding device and a clay conveying device are controlled to adjust the use amount; the density of the casting after regulation and control is detected, if the density does not reach the standard, model output weight iteration optimization is corrected until the density reaches the standard, the system comprises a detection module, a signal processing module, a regulation and control execution module, a density detection and correction module and a central control module, closed-loop control is achieved, and the density stability of the casting is improved.

The invention belongs to the technical field of casting, and particularly relates to a process for improving the appearance quality of a casting by using a sand-isolating chilling block, which comprises the following steps: step 1, during molding or core making, firstly paving a layer of molding sand between risers or in a hot spot area; step 2, fixing the chilling block by using molding sand or supporting nails to ensure that the position of the chilling block is stable; 3, sand is discharged to wrap the chilling block, and it is ensured that a sand layer is firm through compaction operation; 4, after the molten steel is poured, heat of the molten steel is conducted to the chilling block through the sand layer, the local cooling speed of the casting is increased, and sequential solidification is achieved; and 5, after pouring, heat preservation is conducted till box opening is conducted, and an intact casting is formed. According to the invention, a layer of molding sand with a specific thickness is placed between the external chilling block and the mold, so that the external chilling block is converted into the sand insulation chilling block, and in order to ensure that the chilling block achieves the effect of process design requirements and can effectively play a chilling role on a casting, the thickness and size of the chilling block and the thickness of a sand insulation layer can be properly adjusted according to the size of a hot spot of the casting.

The invention relates to the technical field of equipment control, in particular to an intelligent control system of a molding sand separator, which comprises a separation management and control platform, a facility information unit, a deviation supervision unit, a regulation and control evaluation unit, a performance supervision unit, a reliability evaluation unit and a management response unit. According to the invention, analysis is carried out from two points of the control precision and the sensitivity of the target separation equipment control system, so that the control precision and the control sensitivity of the target separation equipment control system are guaranteed, and control performance supervision, evaluation and analysis are carried out in an information feedback and information fusion mode. Stable operation and efficient separation of the target separation equipment are ensured, and system reliability supervision, evaluation and analysis are performed on operation data of the target separation equipment control system in an in-depth manner, so that the reliability level of the target separation equipment control system is known, adjustment and management are facilitated, and the reliability of the target separation equipment control system is improved. Therefore, stable operation of the target separation equipment control system is ensured.

The invention is suitable for the technical field of shakeout machines, and provides a sand mold casting shakeout machine based on metal castings, the sand mold casting shakeout machine comprises a shakeout assembly, a cooling assembly is arranged at the bottom of the shakeout assembly, and the cooling assembly comprises a cold accumulation part, a driving part fixedly connected to the interior of the cold accumulation part and a piston part in sliding fit with the interior of the cold accumulation part; according to the shakeout machine for sand mold casting, the problems that in the using process of an existing shakeout machine for sand mold casting, shakeout bonded to the surface of a metal casting is mostly separated by additionally adding a vibration driving source or manually, so that the whole separation process is too complex, and the shakeout effect is poor are solved. And auxiliary cooling treatment is carried out while vibration separation is carried out, so that the separation efficiency of the whole molding sand and the metal casting is reduced, and subsequent machining operation is not facilitated, the separation efficiency of the molding sand and the metal casting is effectively improved, and the molding sand is prevented from being adhered to the surface of the metal casting. And other later operation processes can be conveniently carried out.

The invention relates to the technical field of molding sand treatment devices, and discloses molding sand treatment equipment. Comprising a rack and further comprises a transmission module, the transmission module is in transmission connection with a sand vibrating frame capable of moving up and down in a reciprocating mode and a rotatable sand filtering shaft, the sand vibrating frame is elastically connected with a sand grinding frame, and the inner wall of the sand grinding frame is rotationally connected with a sand grinding shaft and a reciprocating stroke adjusting part which are used for periodically changing the reciprocating displacement stroke of the sand vibrating frame. The sand filtering cylinder is connected with the machine frame, and a spiral magnetic suction filter disc is installed at the position, corresponding to the inner side of the sand filtering cylinder, of the sand filtering shaft. When the molding sand treatment equipment treats molding sand, on one hand, vibration sand filtering of the molding sand, grinding and refining of the molding sand and striking and refining of the molding sand during jet impact can be achieved through single-motor linkage, and on the other hand, the vibration strength of the vibration mechanism can be periodically adjusted during vibration sand filtering; and the dispersity and the sand filtering effect during molding sand treatment are effectively adjusted.

The utility model discloses a foundry molding sand mixing device which comprises a mixing box and a stirring mechanism installed in the mixing box, a screening mechanism located above the stirring mechanism is installed in the mixing box, the screening mechanism comprises a driving part installed outside the mixing box, the driving part is fixedly connected with a first screening frame through a transmission part, and the first screening frame is fixedly connected with a second screening frame through a transmission part. A cleaning assembly fixed to the inner wall of the mixing box is arranged in the first screen frame, the transmission part comprises a spline shaft, one end of the spline shaft is fixedly connected with the output end of the driving part, the other end of the spline shaft is movably sleeved with a spline sleeve, and the end, away from the spline shaft, of the spline sleeve is fixedly connected with the first screen frame. The driving piece can drive the first screen frame to rotate and shake through the cooperation of the transmission piece and the feeding pipe, so that raw materials of casting molding sand can be rapidly screened, fine sand grains are screened to fall to the stirring mechanism to be stirred and mixed, the production efficiency is improved, and the quality of the casting molding sand is guaranteed.

The invention relates to a device for producing a sand core of a non-precoated sand shell of a supercharger bearing shell, which comprises a core shooter, is equipment for the casting industry, and comprises a stand column component, a sand shooting component, a mold frame component and a base, the negative pressure structure is arranged on one side of the mold frame component and is intermittently communicated with the interior of the mold frame component; in the negative pressure structure, a toothed plate in a sliding rail is connected with a reset spring, the spring is fixed to a limiting baffle, a push rod in the reset spring is connected with a toothed rod, the toothed rod is connected with a driving gear and other components, an upward lifting block in the toothed plate is matched with a mold slope lifting rod, a barge-back rod is arranged above the sliding rail, and a toothed plate side face air exhaust ratchet gear is connected with a reciprocating lead screw and the like. The exhaust pipe is communicated with the air storage tank which is provided with an electromagnetic valve; the device improves the efficiency and the quality, reduces the cost and the labor intensity, when the mold is closed, the mold drives the component to move upwards to exhaust air so as to reduce flying sand, and after core shooting, the component is reset to clean and recycle molding sand.

The invention relates to a casting device for preventing adhesion of a sand casting steel casting, and belongs to the technical field of molding sand casting, the casting device comprises a box body, the left side and the right side of the box body are both provided with impact mechanisms, the bottom of each impact mechanism is fixedly provided with a rib plate, the opposite sides of the two rib plates are both fixed to the box body, and the two rib plates are both provided with stirring mechanisms. Stabilizing blocks are arranged on the left side wall and the right side wall of an inner cavity of the box body, a flow guide plate is fixed to the inner side wall of the box body, a first-stage crushing mechanism is arranged in the inner cavity of the box body and located below the flow guide plate, an air inlet mechanism is arranged on the inner side of the box body, and a second-stage crushing mechanism is arranged on the rear wall of the inner side of the box body. According to the casting device for preventing adhesion of the sand casting steel casting, the sand box is repeatedly impacted through the two impacting mechanisms, molding sand on the surface of a workpiece is promoted to fall off, the molding sand is further promoted to be completely separated from the workpiece, the device is good in anti-adhesion effect, meanwhile, the molding sand can be finely crushed, reutilization of the molding sand is facilitated, and the casting efficiency of the workpiece is further improved.

The invention belongs to the technical field of casting molding, and particularly relates to faucet casting molding equipment and a molding method thereof.The faucet casting molding equipment comprises an upper box body and a lower box body, a feeding pipe is arranged at the top of the upper box body, a feeding pipe is arranged on one side of the lower box body, the other end hole of the feeding pipe is formed above the feeding pipe, and a conveying auger is arranged in the feeding pipe; a third platform is fixedly installed in the upper box body, a second platform is rotatably installed at the top end of the third platform, a first platform is rotatably installed at the top end of the second platform, the bottom end of the feeding pipe is located above the second platform, a gap is reserved between the bottom end of the feeding pipe and the second platform, and an elastic blocking net is fixedly installed on the inner wall of the feeding pipe and is in a horn shape. The diameter of the bottom end of the elastic blocking net is larger than that of the top end of the elastic blocking net, one end of the elastic blocking net is fixedly connected with the bottom end of the inner wall of the feeding pipe, and the recycled molding sand can be crushed through cooperative use of the structures, so that the practicability of the molding sand is improved.

The invention relates to the technical field of casting, and provides heat-resistant and wear-resistant steel production equipment and method.The heat-resistant and wear-resistant steel production equipment comprises a production device, a mold frame is arranged in the middle of the production device, the production device comprises a workbench, clamping assemblies are arranged on the two sides of the middle of the upper end of the workbench, and cavities are formed in the middles of the clamping assemblies; cavities are formed in the upper end of the workbench, vibration assemblies are arranged in the cavities, knocking assemblies are arranged in the middles of the two sides of the upper end of the workbench, a compaction assembly is fixedly installed on the rear side of the upper end of the workbench, ash storage assemblies are arranged on the two sides of the lower end of the workbench, and a rotating assembly is arranged in the middle of the workbench. By removing the holes in the middle and the lower portion of the green sand mixture in the mold frame, the middle and the lower portion of the green sand mixture in the mold frame are tighter, the compaction effect is improved, and then the situation that the yield is reduced due to the fact that the green sand mixture is heated to deform in the casting process is avoided.

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

The method comprises the following steps that a static pressure molding casting line produces a sand mold contained in a sand box, the sand mold is conveyed to a pouring line to be subjected to molten iron pouring operation, the sand box containing a casting is obtained, then the sand box is conveyed to a sand box cooling line through a sand box conveying mechanism to be cooled in a walking mode, and then the sand box is conveyed to a return line through the sand box conveying mechanism; the sand box grabbing and transferring mechanism transfers a sand box to the first barrel box machine, molding sand and a casting in the sand box are pushed upwards into the pouring jacket, the pouring jacket containing the casting is transferred to the pouring jacket conveying line through the first pouring jacket grabbing and transferring mechanism, then the pouring jacket is transferred to the pouring jacket cooling line through the pouring jacket transferring mechanism, and after cooling is completed, the pouring jacket is conveyed to the second barrel box machine. And then the pouring jacket is transferred to a second-stage box puncher assembly on the pouring jacket conveying line, the pouring jacket is transferred to the bottom of the first sweeping mechanism through a second pouring jacket grabbing and transferring mechanism, and the shakeout piece taking operation is completed. According to the process steps, on the premise that the size of the occupied space of the whole device is kept unchanged, the cooling walking distance is effectively increased, the cooling amplitude is improved, and the production input cost is reduced.

A casting molding sand screening device capable of being recycled comprises a machine box and a screen drum rotationally arranged in the machine box, a grinding drum is rotationally installed in the screen drum, a lining ring is fixedly arranged at the position, corresponding to the grinding drum, of the inner side wall of the screen drum, and a grinding face capable of being matched with the lining ring in a mutual grinding mode is arranged on the peripheral side face of the grinding drum. According to the molding sand screening device, the rotatable grinding cylinder is arranged in the screening cylinder, meanwhile, the lining ring matched with the grinding cylinder is arranged on the inner side wall of the screening cylinder, and in the process that molding sand blocks mixed and caked in molding sand are screened in the screening cylinder, small impurity particles can be directly screened out of the screening cylinder; and under the mutual rolling of the rolling cylinder and the lining ring, the caked molding sand blocks can be rolled into molding sand particles with single particle size and capable of achieving the recycling standard, so that the problem of subsequent secondary screening is avoided.

The invention relates to the technical field of casting, in particular to a casting device for forging a lining plate, which comprises a lower mold box, an upper mold box and a limiting rod, the lower mold box and the upper mold box are filled with molding sand, a plurality of mold cavities are linearly arrayed in the molding sand, a material box is arranged above the upper mold box, the material box is fixed on a supporting plate in a suspended manner, and the limiting rod is arranged on the upper mold box. An electric sliding rail is laid on the supporting plate, the lower mold box is slidably installed on the electric sliding rail, the electric sliding rail is electrically connected with a control system, a threaded rod is rotated, the side face of an arc-shaped sliding block can drive an abutting flow control push plate to slide and adjust the length of the portion, extending out of the side face of a material guide rod, of the flow control push plate, and an electric telescopic rod shrinks. The flow control baffles and the discharging sliding plate fixedly connected with the flow control baffles are pushed to slide, the movement distance of the flow control baffles controls the area of gaps among the four flow control baffles to achieve flow control, and finally it is guaranteed that the pouring speed is stable.

The invention relates to the field of metal material casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT800-5, which comprises the following steps: preparing pig iron, waste steel and foundry returns, and using auxiliary materials such as a silicon carbide pretreating agent, a high-temperature graphitization carburant, a rare earth magnesium silicon iron nodulizing agent, a silicon barium nucleating agent and a silicon strontium nucleating agent to prepare the green sand as-cast high-plasticity nodular cast iron QT800-5. The purity and component stability of molten iron are ensured; in the smelting process, purification and adjustment are carried out through temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microscopic structure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation; the final casting has excellent mechanical properties including the tensile strength larger than or equal to 800 MPa, the yield strength larger than or equal to 480 MPa, the elongation larger than or equal to 5% and the matrix pearlite content larger than or equal to 80%. The production process disclosed by the invention is simplified, is suitable for large-scale industrial production, and has a wide application prospect in lightweight application requiring high-strength and high-plasticity materials.

The utility model discloses a sand scraping device of a molding machine, which belongs to the technical field of molding machines and is technically characterized by comprising a reciprocating component and a sand scraping component. According to the sand scraping device disclosed by the utility model, when the sand scraping operation is carried out on the molding mechanism, the device can be moved to the side of a molding machine through the moving assembly, and then the adjusting assembly can be adjusted according to the sizes of different molding machines, so that the heights and angles of the reciprocating assembly and the sand scraping assembly can be adjusted; the sand scraping assembly can be driven to move back and forth by operating the reciprocating assembly when the sand scraping operation is carried out, so that redundant molding sand can be scraped, and the molding sand compacting effect of the subsequent molding machine is improved.

The invention discloses a forming method of a duplex stainless steel propeller, which is specifically implemented according to the following steps: step 1, designing a casting process of the duplex stainless steel propeller, and designing a sand mold used by the casting process by adopting three-dimensional modeling software; 2, a designed sand mold is formed through the 3D printing technology, then the printed sand mold is detected and trimmed, then the sand mold is assembled and put into a sand box, the periphery of the sand box is filled with molding sand, and a mold cavity needed by propeller forming can be obtained; 3, the duplex stainless steel molten metal is injected into the cavity, and a complete propeller casting is obtained; and 4, the propeller casting obtained in the step 3 is subjected to heat treatment, and the final propeller casting is obtained. According to the method, the method that the sand mold is printed in a 3D mode, the cavity is formed, and then metal is poured for integral forming is adopted, so that the problems of sand falling, difficult forming and low strength existing in the existing technology that a resin model is printed in a 3D mode and then sand casting or metal propellers are directly printed in a 3D mode are solved.

The utility model discloses a shakeout roller device for casting molding sand separation, which is characterized in that an inner cylinder is arranged inside an outer cylinder, the inner cylinder is connected with a first discharge port through a first bearing, the inner cylinder is in a straight cylinder shape, the left side of the inner cylinder is connected with the outer cylinder through a second bearing, a rack is arranged on the circumference of the outer side of the left end of the inner cylinder, and a motor is arranged at the upper part of the outer cylinder; according to the sand shakeout device, the inner cylinder and the outer cylinder are arranged, so that molding sand enters the outer cylinder after being separated, the molding sand is prevented from being accumulated in the inner cylinder, a buffering function is achieved on a casting, the sand shakeout effect is improved, and the molding sand is prevented from being left on the casting; and the device is further provided with first shifting teeth and second shifting teeth which are staggered with each other, molding sand cakes falling into the outer cylinder are crushed, the subsequent crushing treatment procedure of the molding sand cakes is omitted, manpower, material resources and time are saved, the subsequent treatment cost of the molding sand is reduced, and good practicability and applicability are achieved.

The invention relates to the technical field of casting, in particular to vehicle gearbox casting equipment which comprises a support, a supporting plate used for placing a sand casting mold is fixedly connected to the support, a fixing mechanism used for fixing the sand casting mold is arranged above the supporting plate, and a driving mechanism is connected with a material guiding mechanism arranged on one side of the supporting plate. Through a rigid limiting structure of the square fixing frame and the supporting plate, impact of molten metal is resisted, displacement and collapse of a sand mold are avoided, inert gas is synchronously injected to stabilize the sand mold, the defects of sand holes and cold shut are reduced, the casting precision of key parts such as a gearbox bearing hole and an oil duct is improved, the inclusion and porosity are reduced, and the air tightness qualification rate of a shell is improved; the driving mechanism controls lifting, material pushing and vibration demolding in a linkage mode, the production period is shortened, the productivity is improved, the labor cost is reduced, meanwhile, molding sand can be recycled, emission is reduced, green manufacturing is met, and an efficient, high-quality and environment-friendly solution is provided for precise casting of the gearbox shell.

The invention discloses a mold for core making equipment and a curing method and application of the mold, and belongs to the technical field of core making machine molds. The curing method comprises the following steps that sand shooting forming is conducted, specifically, in the mold closing state, molding sand is shot into a mold cavity from a sand shooting nozzle in a mold body to be used for forming a sand core; and heating and curing are conducted, specifically, a curing medium heated to be in a gaseous state is injected into the cavity through a plurality of air inlet channels, the curing medium makes contact with the peripheral side of the sand core and then is diffused and permeated, the sand core is cured from the periphery of the sand core, and the air inlet ends of the air inlet channels are separated from the sand shooting nozzles. According to the invention, molding sand injected into the mold can be quickly and uniformly attached to the surface of the loose core, and each part of the sand core can be quickly and uniformly cured in a short time, so that the curing speed of large pieces and high pieces is greatly increased, the curing effect and efficiency are improved, the compactness of the sand core can be improved through vibration, and the production efficiency is improved. And the product quality is further improved.

The utility model relates to the technical field of sand screening machines, in particular to a vibration swing type sand screening machine for molding sand. According to the technical scheme, a discharging hopper is installed on a base, a sieve tray is installed on the discharging hopper, a discharging pipe is arranged on one side of the sieve tray, a top cover is installed at the top end of the sieve tray, a support is elastically installed on the base through a spring, and vibration motors are installed on the two sides of the support. An upper sealing strip and a lower sealing strip are respectively arranged on convex edges at the upper end and the lower end of the sieve tray, a positioning hole is formed in the upper sealing strip, and a positioning block is arranged on the lower sealing strip. The upper sealing strip and the lower sealing strip are respectively arranged on the convex edges at the upper end and the lower end of the sieve tray, and are matched with each other through the positioning blocks and the positioning holes to realize quick limiting and butt joint, so that the tight sealing between the sieve trays is realized. And the hoop is clamped and fixed with the convex edge of the sieve tray through the clamping groove, so that stable connection can be provided, and the sieve tray is ensured not to loosen or fall off in the vibration process.

The present invention discloses a casting mold vibrating and compacting mechanism and an intelligent casting island, comprising a conveying frame, a jacking device and a vibrating device. A conveying trolley is provided on the conveying frame, and a sand box is provided on the conveying trolley. Fixed pipes are fixedly provided on both sides of the conveying trolley, and sliding pipes are rotatably and slidably provided on the fixed pipes. When fixing the model, the second connecting rope is stretched by pulling the hook, and the reel is rotated to hang the model. The hooks on both sides can pull different lengths to adapt to models of different specifications. After the model is hung, the hooks on both sides and the model are simultaneously lowered into the sand box by sliding the reel. In addition, in the process of adding molding sand and vibrating and compacting it, instability of the model is avoided. After the molding sand buries the bottom of the model and is vibrated and compacted, the hook is separated from the model by a decoupling component, which not only improves efficiency, but also ensures the stability of the model during the sand adding process, improves the subsequent pouring effect, and thus improves the quality of the casting.

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

The utility model discloses an anti-deformation heat treatment device for a metal casting, which is used for preventing a pump body casting from deforming during heat treatment and comprises a first fixing piece with a rigid structure, a first connecting part and a second connecting part are arranged on the first fixing piece, and the first connecting part is fixedly connected with a flow outlet of the pump body casting. And the second connecting part is fixedly connected with a shaft hole of the pump body casting. Due to the fact that the pipe wall of the flow outlet is thin, the flow outlet is prone to deformation, the connecting flange deviates, and the quality of a casting is affected, the flow outlet flange and the shaft hole flange are locked through the first fixing piece, and therefore deformation of the pump body casting can be avoided. The opening of the pump body casting is blocked through the first fixing piece and the second fixing piece, and the pump body casting is tightly filled with molding sand, so that deformation of the pump body casting in the heat treatment process can be avoided.

The invention discloses an aerospace vehicle rapid response function composite casting mold forming method and device, and belongs to the crossing field of a sand mold 3D printing technology and an integrated die casting technology. According to the method, firstly, a numerical control machining center or sand mold 3D printing equipment is adopted for manufacturing a multi-material composite core mold, then a cut or printed sand mold / core is assembled on a core mold base in a ridge-closing mode, a servo cabin metal mold is driven to be matched with the sand mold core mold through a mold closing locking mechanism, and the whole set of die-casting mold is formed. Secondly, light alloy (magnesium, aluminum, titanium and the like) is smelted at a high temperature, the speed field and the pressure field of high-temperature molten metal mold filling are indirectly controlled by controlling the movement speed of a piston rod, and high-quality castings are obtained through crystallization and solidification under the pressure. The innovatively proposed'metal mold and sand mold 'combined die-casting die can quickly realize the dynamic heat balance of the temperature of the die. According to the aerospace vehicle rapid response function composite casting mold forming method and device, innovative and green development of a light high-strength alloy casting process is promoted.

The invention relates to the field of sand mixing equipment, in particular to an automatic sand mixing device for hardware casting, which comprises a sand mixer, the sand mixer comprises a machine body, and a middle mixing assembly, an edge mixing assembly and a material leading-out assembly are arranged in the machine body; the middle mixing assembly is used for mixing the molding material in the middle; the edge part mixing assembly is used for mixing molding materials at the edge part; the material guiding-out assembly is used for guiding out the mixed molding material; according to the sand mixer, through cooperative operation of the main scraping plates, the auxiliary scraping plates, the raking claws and the stirring blades, a three-dimensional mixing system is constructed, molding materials can be treated from the bottom to the edge without dead corners, and compared with a single stirring mode of a traditional sand mixer, the sand mixer has the advantages that the stirring efficiency is greatly improved, and the production cost is reduced. The mixing efficiency is remarkably improved, various molding materials can be uniformly blended, and molding sand with stable performance is provided for casting.

The invention relates to the technical field of precoated sand casting, and discloses a precoated sand casting production line based on an intelligent casting island, the precoated sand casting production line comprises a machine body, a sand feeding pipe, a negative pressure sand suction pipe, a distance adjusting piece and a rotatable transmission shaft are respectively mounted in the machine body, and the distance adjusting piece is in transmission connection with two mold frames which are symmetrically arranged and have an adjustable distance; casting systems are arranged on the two mold frames, and each casting system comprises a toothed plate mounted on the machine body, a magnetic field generator mounted on the machine body, a casting frame capable of synchronously moving back and forth and left and right on the mold frames in a reciprocating manner, and a synchronous shaft capable of periodically and alternately rotating forwards and backwards. Technical breakthrough is achieved through the synergistic effect of the magnetic vibration coating and multi-mode vibration, Fe70Ga30 alloy nano-particles of the functional layer generate magnetic domain periodic orientation in an alternating magnetic field, micron-sized multi-axial vibration is excited, the surface of molding sand and a mold interface is deepened, intermolecular acting force is destroyed, deep-layer adhesive sand is stripped in a non-contact mode, and the surface of the mold is stripped in a non-contact mode. The problem that energy penetration of traditional impact type cleaning is insufficient is solved.

The invention relates to the field of casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT450-18, which comprises the following steps of: preparing pig iron, waste steel and foundry returns according to a certain proportion, and preparing the green sand as-cast high-plasticity nodular cast iron QT450-18 by using auxiliary materials such as a silicon carbide pretreatment agent, a high-temperature graphitization carburant, a rare-earth magnesium silicon iron nodulizer, a silicon barium inoculant and a silicon strontium inoculant. And purity and component stability of molten iron are ensured. In the smelting process, purification and adjustment are carried out through accurate temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microstructure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation. The final casting has excellent mechanical properties, including tensile strength greater than or equal to 440 MPa, yield strength greater than or equal to 300 MPa, elongation greater than or equal to 16%, and V-shaped notch normal temperature impact absorption energy greater than or equal to 8 J. The method is simple and convenient to operate, high in production efficiency and suitable for large-scale industrial production.

The invention relates to a jolt ramming table for lost foam casting, and belongs to the technical field of lost foam casting, the jolt ramming table comprises a jolt ramming table body, a limiting mechanism for limiting a sand box is arranged on the jolt ramming table body, and side striking mechanisms for striking the two sides of the sand box are arranged on the two sides of the jolt ramming table body; the side-striking mechanism comprises a vertically-arranged main rod, a plurality of side-striking components are arranged on the inner side of the main rod, and a driving module for driving the main rod to move close to or away from the sand box in a reciprocating mode is arranged on the compaction table body. The driving module drives the main rod to move close to or away from the sand box in a reciprocating mode, so that the side striking component collides the side wall of the sand box back and forth, the sand box further generates vibration in the side direction, then molding sand in the sand box is further vibrated and compacted, and the compaction effect is improved.