275 results about "Sand casting" patented technology

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

The invention discloses a laser cleaning method and system for residual sand of a sand casting mold, and the method comprises the steps: S1, obtaining point cloud data of the surface of the mold through a three-dimensional scanner, reconstructing a triangular mesh model M (V, E, F) of the surface of the mold, V being a vertex set, E being an edge set, and F being a surface set; s2, based on the triangular mesh model, a laser cleaning path is planned; S3, a laser head is controlled to move along the path, and laser is emitted to remove residual sand; according to the method, the residence time calculation model is introduced, the laser residence time is dynamically set by combining the region area, the material removal difficulty coefficient and the characteristic parameters, the adhesion strength signal of the surface of the mold under the laser action is detected in real time through the acoustic emission sensor, error feedback is formed, the laser power, the pulse frequency and the residence time are dynamically adjusted, and the mold surface quality is improved. And the self-adaptive response to the thickness and the adhesion strength of the residual sand in different areas is realized.

The invention discloses an intelligent low-stress sand casting method for a high-end numerical control machine tool basic large part, and belongs to the crossing field of mechanical manufacturing automation and a sand casting technology. According to the intelligent low-stress sand mold casting method for the basic large part of the high-end numerical control machine tool, different sand mold structures are selected for manufacturing parts with different moduli based on the obtained machine tool structural part model. A multi-material hollowed-out intelligent sand mold is selected for forming a high-modulus part, and the part of the sand mold comprises three main parts, namely a surface contact area, a hollowed-out sand mold area and an intelligent control unit. The part with the low modulus is formed by an intelligent compact sand mold, the sand mold of the part is based on a traditional compact sand mold, and a heating material and a control system are arranged in the sand mold. According to the method, the solidification process of each part of the machine tool casting can be intelligently regulated and controlled, so that low-stress casting of the casting is realized, the time required by subsequent aging is shortened, the production responsivity of the machine tool casting is improved, and production and development of a high-precision and high-stability machine tool are promoted.

The utility model discloses a waste sand recovery device of a swage sand-coated casting process, which comprises a conveying belt, the outer wall of the conveying belt is fixedly connected with a mounting plate, the top end of the mounting plate is fixedly connected with a first gear, the bottom end of the mounting plate is fixedly provided with a motor, and the output end of the motor penetrates through the mounting plate and is fixedly connected with a mounting seat. A screw rod is rotationally connected to the mounting base, a second gear is fixedly connected to the position, corresponding to the first gear, of the bottom end of the screw rod, a sliding groove is formed in the mounting base, clamping grooves are symmetrically formed in the mounting base, and a lifting plate is slidably connected to the interior of the sliding groove; the scrap iron sorting device has the advantages that the scrap iron sorting efficiency is high, a large amount of labor input is avoided, the labor cost is saved, the overall structure is simple, the manufacturing cost and the follow-up use cost are low, and the scrap iron sorting device is worthy of application and popularization.

The invention belongs to the field of part manufacturing, and particularly relates to a molten metal purification method for sand mold casting, which comprises the following steps: S1, arranging a steel barrel piece between a pouring ladle and a casting mold for soft sealing, mounting a pressure-bearing pipeline on the steel barrel piece, and forming an angle of 45 degrees between an outlet of the pipeline and a vertical axis; s2, argon is introduced into the pressure-bearing pipeline 5 seconds before pouring, the pressure of the argon is 0.1-0.3 MPa, and argon introduction is stopped immediately when pouring is stopped; and S3, in the cooling process of the molten metal in the casting mold cavity, argon bubbles float upwards to bring inclusions to a top slag collecting groove, and a slag collecting groove is removed during sand cleaning and cutting. According to the steel barrel piece, contact between the atmosphere and molten metal is isolated, and oxide inclusion is effectively prevented; and meanwhile, argon is blown in in the pouring process to form bubbles and enter a casting mold cavity, and casting defects can be effectively reduced according to the principle that the bubbles float upwards to take away inclusions.

The invention relates to the field of sand mold casting, in particular to a casting method of a bearing groove. The problems that in the prior art, the bearing groove part is still sintered and burnt-on sand is serious, burnt-on sand can only be cleaned through burning and cutting of an oxygen dissolving rod, a large amount of manpower and material resources need to be consumed in the finishing process, a body is prone to being seriously damaged during cleaning, the molded line and quality of the bearing groove are affected, and casting scrapping is even caused by serious burnt-on sand are solved. According to the casting method of the bearing groove, the sand burning problem of the thick and large-section bearing groove and the airway surface is solved, and the appearance quality of similar castings is effectively improved. The special core bar and the chromium ore sand core are matched with the special graphite chilling block to form a whole, and the sand burning-on resistance of the graphite chilling block is utilized, so that the sand burning-on problem of the bearing groove is effectively solved. Meanwhile, the size of the special core bar and the graphite chilling block are flexible and adjustable according to the sand core structure, and the universality is high.

The application belongs to the field of core shooting machines, in particular to a kind of foundry coated sand core shooting machine, including frame, movable die assembly, fixed die assembly, sand shooting assembly, sand supply assembly, and the fixed die assembly includes upper die;The upper die and frame are in fixed connection;The upper die top is provided with sand inlet, and bottom is provided with forming chamber;The inner wall of the upper die is provided with exhaust air duct;The bottom of the exhaust air duct is provided with a plurality of first exhaust ports, and the first exhaust port is in communication with the forming chamber;Through the cooperation of first exhaust port, exhaust air duct and second exhaust port, the forming cavity of upper die and bottom die can be exhausted, to reduce the loosening of sand particles in the cavity caused by gas, improve the density and smoothness of the surface of the formed sand core, and at the same time, through the setting of the protrusion, the escape speed of the gas in the exhaust air duct can be accelerated, thereby ensuring the exhaust effect of the device.

This invention discloses a coating for sand casting of aluminum-lithium alloys and its preparation method. The coating comprises a surface layer in contact with the sand mold and a top layer in contact with the melt. The surface layer material is an alcohol-based zirconium oxide coating containing graphene, and the top layer coating is an alcohol-based boride coating containing titanium diboride and zirconium diboride. This invention effectively improves the coating density and heat transfer rate by doping graphene with metal boride nanoparticles. Using graphene, ceramic materials, and metal borides as aggregates and dopants effectively suppresses the burn-off of light elements such as Li, reducing subcutaneous pinholes and porosity defects in the casting. Using zirconium oxide powder as aggregate increases nucleation sites, effectively improving the quality of non-ferrous metal castings.

This invention discloses a frustum-shaped chill for the firing surface of cylinder heads in sand casting, belonging to the technical field of casting process auxiliary parts. The chill includes a chill body with multiple circular bosses evenly distributed along the radial direction on its top surface for precise positioning within the sand mold. The top surface of the body has crisscrossing venting grooves to expel gases generated during the solidification of the sand core and molten metal. The body is divided into upper and lower frustum sections, with the upper frustum being higher than the lower frustum, forming a gradient cooling structure. Through structural optimization, this invention achieves precise and controllable cooling of the cylinder head firing surface, reducing defects such as shrinkage porosity, looseness, and gas porosity to near zero, improving casting density and yield, and is suitable for sand casting production of various aluminum engine cylinder heads.

This invention relates to the field of sand casting technology and discloses a follow-up sand-receiving tray structure for casting. It includes a recovery box and a support component rotatably mounted inside the recovery box. A buffer guide component is installed on the support component, and a support component is slidably mounted on the buffer guide component. In this invention, as the support component rotates, the support component slides diagonally downwards along the buffer guide component, immersing itself in the recovered sand in the recovery box. As a stepper motor drives the support component to rotate, the support component resets, and the recovered sand is spread evenly across the support component. Due to the arc-shaped design of the reinforcing rib frame (lower in the middle and higher at the edges), after the recovered sand is spread across the support component, it covers the reinforcing rib frame. When the sand box flips, the center of the support component corresponds to the high-temperature casting. At this time, the casting is buffered by the recovered sand spread across the support component, significantly reducing the impact force on the casting and preventing direct contact between the casting and the ribs on the reinforcing rib frame, thus reducing casting damage.

This invention belongs to the field of cryogenic sand casting technology, specifically relating to a composite sand mold for cryogenic sand casting and its preparation method. The preparation method includes: based on the size and shape of the casting, the structure and three-dimensional dimensions of the cryogenic sand blank; preparing cryogenic sand blanks according to a preset structure and three-dimensional dimensions; performing subtractive processing on the cryogenic sand blanks according to a preset subtractive processing procedure to obtain a sand mold; wherein the sand mold includes a cryogenic sand mold and a resin sand mold disposed on one side of it; and closing the separately prepared upper and lower sand molds to form a cavity, thereby obtaining a composite sand mold for cryogenic sand casting. The preparation method of this invention can at least improve the problem of floating sand during cryogenic sand mold blank preparation and moldless subtractive processing, while also improving the processing performance of the sand mold and increasing the gas generation during pouring.

The magnesium alloy sand mold casting quantitative shakeout device comprises a sand box, a partition plate is fixed in the sand box, the partition plate vertically penetrates through an opening and is communicated with a sand leakage pipe, the sand leakage pipe is provided with a controller, the magnesium alloy sand mold casting quantitative shakeout device further comprises a sand measuring box fixedly connected to a sand measuring area, and the sand measuring box is of an upper opening structure; the bottom of the sand measuring box is matched with and vertically connected with a bottom plate in a sliding mode, the bottom plate is of a through opening structure and is communicated with a sand discharging pipe, the sand discharging pipe penetrates through and is connected to the sand box in a sliding mode, the sand measuring box is further connected with a sand locking plate in a sliding mode, and the sand locking plate is used for being inserted into the sand discharging pipe. The sand metering box is fixed in the sand metering area to close or disconnect the sand discharging pipe, a vertical linear driving part is further fixed in the sand metering area, and the driving end of the vertical linear driving part upwards penetrates through the sand metering box and is connected to the bottom plate. The technical problem that an existing quantitative shakeout mode cannot guarantee the quantitative precision can be solved.

The utility model relates to the technical field of drawing devices, and discloses an anti-damage drawing device of a sand casting mold, which comprises a mounting base, a support rod body and an upper transverse plate body, a traction rope is wound outside a winding shaft, and the bottom of the traction rope is connected with a clamping seat. By arranging the uniform drawing structure, the two groups of clamping seats are clamped with the two sides of an upper die guide plate of a casting die body during use, the anti-skid clamping blocks at the tops of the adjusting screw rods are driven to ascend and descend in the clamping seats to clamp the upper die guide plate of the casting die body, and then an upper guide cross rod is placed at the tops of the clamping seats; the upper fixing knob is inserted into the top of the upper guide cross rod to be in contact with the clamping seat, then the two-way motor drives the winding shaft to rotate and wind the traction rope, the traction rope pulls the clamping seat and an upper die of a casting die body fixed by the clamping seat to be pulled upwards for drawing, and the clamping seat is kept stressed uniformly through the upper guide cross rod, so that the uniform drawing function is realized.

The present application relates to the technical field of high-strength aluminum alloy precision casting, and particularly relates to a ZL205A thin-wall component 3DP sand mold casting process, S1, a digital design casting model and a pouring system simulation are adopted to export a printing slice; S2, a mixture of silica sand and zircon sand is adopted, phenolic resin is used as a binder, and an environmentally-friendly sulfonic acid curing agent is used as a curing system to complete sand mold printing; S3, the sand mold is precisely processed to obtain a to-be-assembled mold; S4, ZL205A alloy is melted and refined, an Al-Ti-B-RE composite refiner is added after refining, the adding amount is 0.4wt%, the refined product is preserved for 15 minutes, and the casting mold is preheated at different temperatures at different thickness positions; S5, local gap pouring and bottom pouring are adopted for pouring; S5, post-processing and qualification detection are performed on the casting, the present application adopts the core advantages of a composite pouring process and a regional gradient preheating process, and completely solves the casting defect pain point of variable-wall-thickness components.

This invention discloses a sand-cleaning device and its operating method for automobile cylinder head sand casting, relating to the field of automobile cylinder head production technology. It includes two sand-cleaning bodies, each equipped with: a transmission component for moving the automobile cylinder head; a linkage component for rotating the automobile cylinder head while it is moving; a limiting component for limiting the rotation of the automobile cylinder head; a guiding component for guiding the moving automobile cylinder head; and a buffer component for buffering the rotation of the automobile cylinder head. This invention further solves the problem that traditional sand-cleaning devices for automobile cylinder head sand casting often leave residual sand in the cylinder head cavity after casting, making it difficult for traditional water washing and air suction devices to effectively clean the cylinder head cavity. This is achieved by setting a buffer rod on the inner wall of the limiting groove and a fixing block on the outer wall of the buffer rod, allowing the gear plate to continuously rotate the automobile cylinder head via a clamping plate.

The utility model relates to the technical field of casting and metallurgy, in particular to a sand box for sand mold casting, which comprises a first sand box, a second sand box and a pouring part, a plurality of stacked sand cores are arranged in the first sand box and the second sand box, the plurality of sand cores form a sand mold, and the pouring part is arranged in the sand mold. The pouring part comprises a pouring cup, a straight pouring gate and a plurality of bidirectional pouring cross pouring gates which are communicated in sequence, and casting molten iron passing through the pouring part is injected into the sand mold. According to the sand box for sand mold casting, the production quality of large-diameter castings is improved, the pouring time is greatly shortened, meanwhile, the utilization rate of the space in the sand box and molding sand is increased, and waste of the molding sand and molten iron is also avoided.

The invention discloses a frozen sand mold multi-mode additive and subtractive material in-situ composite manufacturing method, and belongs to the technical field of additive and subtractive material composite manufacturing. According to the method, on the basis of the water-ice phase change reversible characteristic of the frozen sand mold, a mixture of a sand mold material and water is frozen at low temperature to form an ice crystal network framework, precise material reduction machining is conducted on the frozen sand mold through five-axis numerical control equipment, and laser cladding, magnetic field oriented deposition and hot pressing sintering multi-mode material increase technologies are combined; and in-situ additive forming is achieved on the surface of the cavity after material reduction. By regulating and controlling the temperature gradient or the magnetic field intensity, a middle combination or three-dimensional interlocking structure of the material adding layer and the ice sand base body is achieved, finally sand materials are recycled through the gradient unfreezing and separating technology, and the material utilization rate is increased. The precision limitation of traditional sand mold casting is broken through, the manufacturing cost is reduced compared with a traditional additive and subtractive process, and the method is particularly suitable for the precision manufacturing field of aerospace complex inner runner components, new energy automobile integrated castings and the like.

This invention relates to a method for designing a combined mold for multi-cavity thin-walled castings, belonging to the field of sand casting technology. It solves the problems of existing traditional casting techniques, such as the large number of sand cores, difficulty in positioning, and easy deformation leading to insufficient dimensional accuracy and poor casting quality. The invention provides a method for designing a combined mold for multi-cavity thin-walled castings, comprising the following steps: S1: Determining the preset number of risers and the number of sand mold partings; S2: Designing the sand mold partings according to the number of risers and the modulus, with each sand mold parting containing a "double-row comb-type" venting unit; S3: Designing a wooden main mold based on the overall shape of the sand mold. The combined mold designed by this method significantly reduces the number of partings compared to traditional sand cores, thereby simplifying operation, ensuring accurate positioning, reducing errors, improving venting performance, reducing porosity in the casting, and achieving high precision in the inner surface of the sand mold, resulting in accurate casting dimensions and good surface quality.

The invention discloses a design method of a 3D printing integrated sand mold cooling channel system for sand mold casting. The design method comprises the following steps: designing a pouring system, determining a chilling part according to the structural characteristics of a casting, designing a cooling channel at the chilling part, designing a connecting channel according to the obtained cooling channel, and communicating all the cooling channels through the connecting channel. And selecting the top surface of one of the risers as a reference plane, drawing a closed curve comprising a pouring system, a cooling channel and the maximum contour of a connecting channel in the normal direction of the reference plane, and drawing a sand mold contour line based on the closed curve to obtain the integrated sand mold cooling channel system. According to the invention, the problems of size deviation and shape deviation of a cavity caused by accumulation of manufacturing errors of the existing split sand core / outer sand mold are solved, the size precision of the sand mold is improved, and the problems of difficult mold opening, many mold opening times, complex and tedious sand mold assembly steps and the like of a complex structure are solved; the production efficiency is improved, and the error rate of manual operation is reduced.

The utility model relates to the technical field of casting, and discloses a resin sand casting curing device which comprises a stirring barrel, a first motor is fixedly connected to the top of the stirring barrel, the driving end of the first motor is fixedly connected with a rotating shaft, and a plurality of second blades which are evenly distributed are fixedly connected to the left side and the right side of the rotating shaft. Two fixed shafts are fixedly connected to the top side in the stirring barrel, a plurality of uniformly distributed blades I are fixedly connected to one side of each fixed shaft, a discharging pipe is fixedly connected to the bottom of the stirring barrel, an electric valve is arranged on the periphery of the discharging pipe, and a connecting pipe is fixedly connected to the rear side of the stirring barrel. According to the utility model, the first blade can assist the first blade in stirring through the rotation of the second blade, resin can be more thoroughly mixed with sand through stirring, the consistency and the stability of curing are improved, the stirring barrel can be heated by starting the heater, and the heater ensures uniform curing of the resin and improves the production efficiency by providing a constant and proper temperature.

The utility model relates to the technical field of resin sand casting, in particular to a rapid sand cooling device for resin sand casting, which comprises a bottom frame, a circular horizontal tank with an open top is fixedly mounted at the top of the bottom frame, and a rotatable water jacket roller transversely penetrates through the circular horizontal tank with the open top. The water jacket roller is connected with a heat conduction conveying helical ribbon capable of making contact with the inner wall of the circular horizontal tank with the open top, the two ends of the circular horizontal tank with the open top are arranged to be a feeding end and a discharging end respectively, a discharging port is formed in the bottom of the discharging end, the liquid supply mechanism supplies cooling liquid for the water jacket roller from the discharging end, and the driving mechanism drives the water jacket roller to rotate. The cooling device has two cooling modes of natural wind heat dissipation and liquid cooling heat exchange, and the cooling effect of sand is improved.

The utility model discloses a metal liquid rapid degassing device for resin sand casting's intermediate frequency electric furnace, related to metal smelting technical field, including bottom plate, be provided with intermediate frequency electric furnace and electric furnace control part on the bottom plate, the bottom of intermediate frequency electric furnace is installed with the air inlet pipe, is installed with the connecting pipe on the air inlet pipe, is installed with the hose on the connecting pipe, is installed with the disconnection pipe on the hose, the top of bottom plate is rotatably arranged with the exchange disc, is installed with the sealing ring in the air outlet pipe, the exchange disc bottom is installed with the exchange shaft, and the exchange shaft rotatable installation is in the bottom plate, and the gear is fixedly sleeved on the exchange shaft, and the gear is intermittently engaged with the gear toothless wheel, and the driving motor is installed on the bottom plate, and the gear toothless wheel is installed on the drive shaft, the utility model discloses, can transport the argon in argon tank to the intermediate frequency electric furnace, and the argon in the intermediate frequency electric furnace will remove the harmful gas in metal liquid quickly. Single argon tank can be automatically and quickly replaced when using, and the operation is convenient and easy to use.

The application discloses a precision casting process of an aluminum alloy casting for a refrigerator liner mold, relates to the technical field of aluminum alloy casting, and makes the filling of aluminum liquid in a mold cavity more stable and complete through step-by-step differential pressure pouring and multi-stage cooling control technology, so that the porosity of the casting is reduced, the tensile strength is improved, the performance is better than that of traditional sand casting and metal gravity pouring, and during a temperature window period after complete solidification of the casting and before mold opening, controlled vibration is applied to the casting by using mold constraint, so that the residual stress can be reduced by more than 80%, and because the casting is under the constraint of the mold, stress release is performed in the form of micro-dislocation movement, and macroscopic deformation is not generated; through a laser impact in-situ strengthening process, the surface of the mold cavity is selectively strengthened without disassembling the mold, so that the surface hardness is improved, and the thermal fatigue cycle number is increased by more than 2 times.

The application discloses a resin sand casting equipment and a casting method, and belongs to the technical field of resin sand casting. The resin sand casting equipment comprises an equipment main body, a mobile containing adjusting assembly is installed on the equipment main body, a mold assembly and a compaction and punching assembly are connected with the mobile containing adjusting assembly, and a fixing assembly is further connected with the mobile containing adjusting assembly, the mold assembly and the compaction and punching assembly. The fixing assembly comprises a lower fixing assembly and an upper fixing assembly. The lower fixing assembly is installed on the mobile containing adjusting assembly, and the lower fixing assembly is connected with the equipment main body and the mold assembly. The upper fixing assembly is installed on the compaction and punching assembly, and the upper fixing assembly is connected with the mold assembly. Through the above mode, the automatic taking and placing of the pouring module in the resin sand process are realized, and the production efficiency is improved.

A box closing guide mechanism for casting production comprises an upper sand box and a lower sand box, the top and the bottom of the upper sand box are coated with plastic films, the top and the bottom of the lower sand box are coated with plastic films, and the box closing guide mechanism is characterized in that a guide plate is arranged on the side wall of the lower sand box in the box closing direction; the distance between the side wall, close to the lower sand box, of the guide plate and the outer side wall of the lower sand box is L, the thickness of the plastic film is L1, and L is larger than L1; an upper positioning plate is fixed on the side wall of the upper sand box, a guide post is fixed on the lower part of the upper positioning plate, a lower positioning plate is fixed on the side wall of the lower sand box, a guide hole is formed in the upper surface of the lower positioning plate, and the guide post is matched with the guide hole. When the box closing operation is carried out, the plastic film is not rubbed, so that the plastic film is not damaged, the vacuum degree of the sand box is ensured, and the normal operation of sand casting is ensured.

The utility model relates to the technical field of powder concentrator cleaning, and discloses a rotor powder concentrator cleaning device which comprises a cleaning pool, the cleaning pool is in a funnel shape, a water outlet is integrally formed in the bottom of the cleaning pool, and a sand casting layer is erected in the cleaning pool. The inner wall of the cleaning pool is connected with the lapped sand casting layer in a clamped mode through an arranged clamping and locking mechanism, an overturning mechanism is rotationally arranged in the sand casting layer, a first driving mechanism is arranged at the bottom of the inner wall of the cleaning pool, and the bottom end of the overturning mechanism penetrates through the sand casting layer and is connected with the first driving mechanism in an inserted mode. According to the cleaning device for the rotor powder concentrator, the problems that in the prior art, blades on a rotor are arranged closely, dust is extremely prone to being stored during cleaning, workers need to wipe the blades one by one, and the number of the blades on the rotor is large, so that the cleaning efficiency of the powder concentrator is seriously affected are solved.

This utility model discloses a casting structure for ADI material, belonging to the field of sand casting technology. It includes a gating system; a filter chamber comprising an upper pressure groove, a lower pressure groove, and several filters separating the upper and lower pressure grooves. One end of the upper pressure groove is connected to the gating system, and the groove width and cross-sectional area of ​​the upper pressure groove gradually increase away from the gating system. The outlet is connected to the lower pressure groove. The upper pressure groove's gradually increasing groove width and cross-sectional area away from the gating system allows for control of the amount of molten iron passing through each filter, reducing the risk of damage to the front-end filters due to excessive molten iron flow reaching their service life. This ensures each filter reaches its maximum filtration value, improving the filtration capacity of each filter and reducing the number of filters required. Simultaneously, the shape of the upper pressure groove utilizes fluid dynamics principles, transforming some of the turbulent flow in the molten iron into laminar flow, avoiding the increase of inclusions and gas entrainment, and reducing secondary slagging.

Flaw detection equipment for sand casting parts relates to the technical field of sand casting part detection equipment and comprises a base, two longitudinal guide rails are mounted on two sides of the upper end face of the base through supporting frames, longitudinal electric sliding blocks are slidably mounted on the outer portions of the longitudinal guide rails, and a transverse guide rail is fixedly mounted between the two longitudinal electric sliding blocks; a transverse electric sliding block is slidably mounted outside the transverse guide rail, an electric push rod is mounted below the transverse electric sliding block, a mounting head is mounted at the bottom of the electric push rod, an ultrasonic probe is mounted below the mounting head, and a positioning table is arranged on the front side of the upper end face of the base; by means of the scheme, the problems that flaw detection equipment cannot rapidly achieve comprehensive detection, and relative displacement of the casting and the probe is prone to occurring in the detection process are solved.

The utility model relates to the technical field of casting, discloses an improved core box structure, and aims to solve the problem that a traditional core box is short in service life due to the fact that vertical ribs are thin and easy to damage. The core box comprises an upper cover, a core box bottom, side edges and vertical ribs, four auxiliary supporting legs are additionally arranged at four corners of the upper cover, and the height of the auxiliary supporting legs is higher than that of the original vertical ribs; meanwhile, circular grooves are formed in the corresponding positions of the side edges, and the supporting legs are embedded into the grooves in the assembling process to form a stable supporting structure. When the core box upper cover is horizontally placed, the auxiliary supporting legs completely bear the weight, the vertical ribs are prevented from making contact with the ground, and therefore the hidden danger that the vertical ribs are damaged due to stress is eliminated. The auxiliary supporting legs are preferably made of cylindrical wear-resistant metal or engineering plastic, and the depth of the circular grooves is 1.2 times of the length of the supporting legs, so that the embedding stability is ensured. By optimizing stress distribution, the service life of the core box is remarkably prolonged, and the core box is simple in structure, easy to process and assemble and suitable for large-scale application in the field of sand casting.

This invention relates to the field of intelligent sand casting technology, providing a sand mold vent hole cleaning device and method. The automatic cleaning device includes an inner support frame, an outer support frame, an X / Y / Z-axis shifting mechanism, an air blowing pipe assembly, and a compressed air generator. A roller conveyor assembly is installed on the inner support frame, along which the sand box of the sand mold to be cleaned moves. After the sand mold vent holes are drilled, the sand box is moved to the inner support frame, and the air blowing pipe assembly is automatically inserted into each vent hole sequentially by the X, Y, and Z-axis shifting mechanisms to clean residual sand, resulting in high cleaning efficiency. This invention also utilizes a first weighing unit at the drilling station and a second weighing unit at the cleaning station to calculate the drilling and cleaning quality through weight differences, enabling online automatic monitoring of the sand mold vent hole cleaning effect, improving the level of intelligent sand casting, and ensuring casting quality.