923results about "Mould handling/dressing devices" patented technology

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.

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 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 sand recovery system of a precoated sand and iron sand mixed molding line, and particularly relates to the technical field of sand mold casting, the sand recovery system comprises a sand recovery device, a screening mechanism used for preliminarily screening mixed sand is arranged in a connecting frame, and a recovery mechanism used for recovering iron sand is arranged in a magnetic separator; a sorting mechanism used for recycling precoated sand is arranged on the surface of the sand recycling device, through the screening mechanism, the recycling mechanism and the sorting mechanism, large-particle sand in mixed sand can be separated out through a screen plate, then iron sand in the sand is separated out through a magnetic suction roller, and the precoated sand in the sand is separated out through an air blower. The precoated sand and the iron sand are added into the sand mixer, so that the precoated sand and the iron sand are mixed in proportion and then put into the molding line again for use, efficient recovery of the precoated sand and the iron sand is achieved, waste of the sand is reduced, and meanwhile energy consumption and equipment complexity in the sand recovery process are reduced by optimizing the sorting technology.

The invention discloses a shakeout treatment device used after sand mold casting forming, relates to the technical field of sand mold casting, and aims to solve the technical problems that traditional sand mold casting equipment is lack of crushing and screening before shakeout, large-particle sand is prone to blocking a casting part, the equipment is stuck and damaged, and the service life and safety are affected. Comprising a treatment barrel, a feeding port formed in the upper portion of the treatment barrel, an isolation plate located below the treatment barrel, a motor, a draught fan and a pressure valve, and the motor is located below the treatment barrel. According to the device, the secondary crushing assembly and the pressing assembly are designed, so that the device can accelerate discharge of sand and stones in a mode of synchronous cooperation of gas pushing and ground attraction force, the effect of guaranteeing the use safety and the machining quality of the device is achieved, and meanwhile, by means of multiple times of shakeout treatment, the machining efficiency is improved. And therefore, the situation that the shakeout is blocked in the alloy casting due to uneven shakeout volume during follow-up secondary utilization of the shakeout is reduced, and the effect of guaranteeing the machining quality of the alloy casting is achieved.

The invention discloses a device for driving used sand to regenerate through airflow. The device comprises a shell, a sand inlet, a regeneration assembly, an air supply assembly and a sand outlet. The regeneration assembly comprises a collecting bin, a wear-resistant disc, a blowing valve, a blowing pipe and a flow guide plate; the collecting bin can receive used sand fed from the sand inlet, the blowing valve is arranged at the bottom of the collecting bin, the wear-resistant disc is arranged at the top of the collecting bin, and the blowing valve blows the used sand upwards through the blowing pipe to impact the wear-resistant disc; and the guide plate is arranged below the wear-resistant disc and is used for receiving the used sand after impacting the wear-resistant disc. According to the device for driving the used sand to be regenerated through the airflow, the used sand is gathered at the bottom through the collecting bin, high-pressure gas is introduced through the blowing valve to spray the used sand upwards, the used sand is efficiently driven to enter the blowing pipe in combination with the negative pressure effect of the venturi tube, and the used sand impacts the wear-resistant disc at a high speed to form friction vortexes, so that the used sand is regenerated. Therefore, high-efficiency regeneration of the used sand is realized; and the whole structure is simple and reasonable in design, convenient to operate and easy to maintain.

The invention discloses evanescent mode casting equipment and technology for a gearbox shell of a new energy commercial vehicle, and belongs to the technical field of evanescent mode casting. The evanescent mode casting equipment is characterized in that a jolt ramming mechanism is installed in a workbench, a sand box is placed on the jolt ramming mechanism, a sand receiving mechanism and a screening mechanism are slidably arranged on the workbench, and the sand box comprises a box body; a second rectangular plate and a third rectangular plate are arranged in a sliding mode, the first rectangular plate and the second rectangular plate are connected in a clamped mode, the second rectangular plate and the third rectangular plate are perpendicularly distributed, the second rectangular plate slides outwards to achieve separation of the first rectangular plate and the second rectangular plate, meanwhile, the first rectangular plate can be driven to rotate downwards by a small angle, and falling of gravel in the sand box is achieved; and after the sand and the stones are completely fallen, the rotation angle of the first rectangular plate is driven to be increased, so that the falling of the castings in the sand box can be realized, the three-stage separation of sand and the stones, impurities and the castings is further realized, the separation processes do not interfere with each other, the operation is simple, and manpower and time are saved.

A core quality estimation system that estimates quality of a core to be formed by filling a mold with kneaded sand produced by kneading in a kneading tank and heating the kneaded sand includes a computer that executes operations of acquiring mold temperature information of the mold, acquiring environmental information regarding a surrounding environment in which the core is formed, and estimating the quality of the core based on the mold temperature information and the environmental information.

The invention relates to the field of intelligent manufacturing and industrial automation, and discloses a precoated sand intelligent batching system, which comprises an order information intelligent acquisition and verification module for receiving and verifying order information of a customer; the dynamic production scheduling engine module is used for dynamically arranging a production plan according to the order information and the production state; the multi-mode sensing weighing control module is used for collecting components and weights of crude sand and waste sand in real time and carrying out data fusion and compensation processing; the intelligent waste sand regeneration formula generation module is used for generating a mixed formula of regenerated sand so as to realize recycling of the waste sand; and the real-time monitoring and self-adaptive optimization module is used for carrying out real-time monitoring and dynamic optimization on the whole system, and ensuring that all the modules work cooperatively and have good response capability. Through the combination of data acquisition and real-time analysis, the smoothness of information flow is ensured, the weight and component data obtained in real time can be quickly processed, and the execution of a production plan is more accurate.

The invention discloses a motor base casting forming device and method, belongs to the technical field of motor manufacturing, and is suitable for production of motor bases for new energy automobiles. The device comprises an evanescent mode casting forming unit and a casting post-processing unit, the post-processing unit integrates a sand recycling conveying belt, a bearing buffering mechanism, a pre-cooling system, a driving assembly, a guiding-out piece and a transferring sand removing mechanism, the core is bearing pieces which are arranged in a staggered mode and provided with elastic buffering and built-in water ways, and the working states are switched in cooperation with air cylinder driving. The method is automatically achieved through the whole process of casting forming preparation, buffering receiving, sand-iron separation, precooling discharging, guiding-out and transferring and online sand removal. Through double protection of elastic buffering and water-cooling pre-cooling, impact damage and uneven cooling of castings are avoided, sand and iron are separated synchronously, the recovery rate is high, the automation degree is high, the forming precision and production efficiency of the motor base are effectively improved, and the requirements for batch production and high precision of automobile manufacturing are met.

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.

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 relates to the technical field of foundry sand treatment devices, in particular to a screening device for butterfly valve casting molding sand, which comprises a buffer tank and a base, the upper end of the base is fixedly connected with a filtering tank, the outer side of the filtering tank is provided with a first motor, and the inner side of the filtering tank is provided with a filtering mechanism for screening the molding sand. A conveying belt is installed at the upper end of the base, a discharging mechanism used for evenly discharging molding sand is installed at the upper end of the conveying belt, aiming at radioactive impurities of the nuclear power butterfly valve to the molding sand, through combination of visual recognition and magnetic separation, the content of metal impurities is reduced, and the casting standard of nuclear first-grade components is met; sintered sand blocks larger than 1.5 mm can be accurately removed, it is avoided that the sintered sand blocks block a follow-up screen or the strength of a sand mold is uneven, the 0.8 mm aperture of the woven mesh is matched with vibration of the arc-edge sleeve to prevent blocking, coarse sand grading of silica sand is achieved, and the problem that in traditional screening, fine powder agglomerates, and air permeability is insufficient is solved.

The utility model discloses a sand conveying device for precoated sand production, and relates to the technical field of sand conveying devices, the sand conveying device comprises a feeding cylinder, one end of the feeding cylinder is provided with a circular groove, a rotating pipe is rotatably arranged in the circular groove, and the end, located in the feeding cylinder, of the rotating pipe is fixedly connected with an auger blade; the end, located outside the feeding barrel, of the rotating pipe is rotationally connected with a fixing sleeve, a partition block is fixedly connected to the inner wall of the fixing sleeve, a gas channel allowing gas to penetrate through is formed between the partition block and the inner wall of the fixing sleeve, the gas channel is in a fan shape and located on the lower half section of the fixing sleeve, and the partition block is attached to the rotating pipe. According to the sand conveying device for precoated sand production, by arranging the rotating pipe, the fixing sleeve and other structures, the functions of conveying, air drying and dust cleaning can be achieved at the same time, the use efficiency of the sand conveying device is improved, and sprayed gas is located at the position of the lower half section of the feeding barrel and better acts on sand, so that the sand can be fully turned over.

The invention provides intelligent casting sand mixing equipment based on dynamic compensation, and belongs to the technical field of casting equipment.The intelligent casting sand mixing equipment comprises a spiral conveyor, a stirring barrel, a rotating shaft and a sand mixing paddle, the outer side of a propelling section of the rotating shaft is sleeved with a sleeve, the outer side of the sleeve is connected with a spiral blade, and the propelling section of the rotating shaft is provided with a mounting groove; the spiral blade and the rotating shaft are arranged to be in a connectable state or a disconnectable state, when mixed sand needs to be conveyed into a mold, the spiral blade and the rotating shaft are connected through centrifugal force, at the moment, the sand mixing paddle and the spiral blade rotate synchronously, the sand is pushed, and meanwhile the sand mixing paddle and the spiral blade can rotate synchronously, so that the sand mixing efficiency is improved. The sand, the curing agent and the resin are mixed, the rotating speed of the rotating shaft is reduced when short-time shutdown does not need sand discharging, at the moment, the centrifugal force is small, the spiral blade is separated from the rotating shaft, the rotating shaft only drives the sand mixing paddle to rotate at a low speed, the sand is stirred, sand solidification is avoided, and the spiral blade does not rotate and does not push the sand.

The invention discloses a waste sand recovery device of a sand mold 3D printer and a recovery method of the waste sand recovery device, and relates to the technical field of sand mold 3D printing. The waste sand screening device comprises a mounting frame, a stirring feeding assembly and a screening assembly, a lifting stirring rod moves downwards to the position closest to the bottom of the inner wall of a heating stirring box, a lifting sealing plate moves downwards in the moving process of the lifting stirring rod, and a material conveying mechanism transfers waste sand in the heating stirring box into a vibration screening box through a discharging pipe; the vibrating screening box vibrates to screen waste sand blocks in the waste sand and leave the waste sand blocks on the top surface of a screening filter plate, and qualified waste sand enters a recycling box; during cleaning, the lifting stirring rod can vertically move to stir waste sand in the heating stirring box, and after cleaning is completed, the lifting stirring rod downwards moves to the lowest position from the highest position, so that the lifting baffle moves, and the discharging opening is closed; when heating and stirring are carried out, waste sand blocks can be cleaned, so that the heating and stirring work can be carried out without shutdown, and the working efficiency is improved.

The invention discloses an intelligent material ratio self-adaptive regulation and control system based on a sand mixer, and belongs to the technical field of sand mixing regulation and control, and the intelligent material ratio self-adaptive regulation and control system comprises a high-precision material characterization unit used for generating a dynamic material characteristic vector; the multi-mode process sensing unit is used for synchronously acquiring a torque vibration signal, a visual image sequence and a chemical spectrum signal in a mixing process; the global knowledge base is used for storing historical production case data, optimization strategies and model parameters; and the core processor comprises a multi-mode digital twin body, an autonomous decision engine, an exception processor and an instruction verification and smoothing device. According to the method, digital twin bodies are constructed by fusing multi-source sensing data, visualization of the mixing process and precise prediction of the performance are achieved, stirring parameters and the material ratio are dynamically and cooperatively adjusted based on a rolling optimization and autonomous learning mechanism, and finally molding sand performance stability, energy consumption optimization and self-adaptive toughness control over abnormal working conditions are achieved.

The invention relates to the technical field of sand mixing, in particular to a sand mixing machine for molding sand for casting, which comprises a sand mixing bin, a mixing mechanism for mixing the molding sand in the sand mixing bin, and a discharging mechanism for discharging the molding sand in the sand mixing bin, according to the sand mixing machine for the molding sand for casting, the material stirring paddle is inserted into materials in the sand mixing bin, so that an adhesive is directly injected into a material base body; in the process that the material stirring assembly rotates in the circumferential direction of the sand mixing bin, on one hand, materials are subjected to three-dimensional shearing stirring, and the macroscopic mixing effect is enhanced; and secondly, the adhesive is prevented from being exposed on the surface of the material by deeply burying and adding the material, so that the generation of flying dust is inhibited from the source. Besides, the addition mode can realize uniform dispersion of the adhesive in a material matrix, so that the mixing period is remarkably shortened, and chemical phase change caused by temperature rise due to excessive stirring of the gravels is effectively prevented.

The utility model relates to the technical field of precoated sand core shooters, and discloses a core shooter with a precoated sand recovery device, which comprises a bottom plate, the core shooter is fixedly mounted on the upper surface of the bottom plate; and the core box is arranged on the upper surface of the bottom plate. A third connecting rod and a second rotating rod are pushed inwards, the third connecting rod drives a second connecting rod to move downwards through a fixing block, the second connecting rod drives a first sliding block to slide on the inner wall of a first sliding hole, meanwhile, the second connecting rod drives a scraping plate to move downwards, and the scraping plate drives the second connecting rod to slide on the outer wall of a connecting plate through a blocking rod. A first rotating rod is rotated, a second rotating rod slides into the inner wall of a limiting hole, the first rotating rod can be blocked by a fixing ring, then an electric telescopic rod is started, the electric telescopic rod retracts, a first connecting rod is driven by a connecting block to slide on the inner wall of a sliding rail, and the stop rod and the scraper are driven to move on the upper surface of the core box; and the precoated sand on the core is scraped into the collecting hopper, so that the effect of scraping redundant precoated sand is achieved.

The invention relates to a device and method for uniformly mixing precoated sand and relates to the technical field of precoated sand stirring and mixing, a stirring mechanism divides a mixing tank into an upper cavity and a lower cavity, after precoated sand is formed through mixing in the upper cavity, the precoated sand can be discharged into the lower cavity and cooled in the lower cavity, the upper cavity can continue to conduct stirring and mixing operation, and therefore the precoated sand can be uniformly mixed. Furthermore, stirring and cooling of the precoated sand can be separately operated through the stirring mechanism, continuous stirring can be conducted in the upper cavity, the working procedures in the upper cavity are reduced, the mixing efficiency of the whole device is improved, after the precoated sand is mixed, the uncooled precoated sand can be screened through the screening mechanism, and large-particle precoated sand is fed into the lower cavity to be cooled; and the screened small-particle precoated sand can be sent back into the screen drum again, new sand and a resin mixture are added and then continue to be mixed, the resin mixture continues to be attached to the surface of the small-particle precoated sand, the small-particle precoated sand becomes large-particle precoated sand, and waste of the small-particle precoated sand is avoided.

The invention relates to the technical field of precoated sand, in particular to high-performance precoated sand and a preparation method thereof.The formula comprises silica sand, reclaimed sand, resin, urotropine, calcium stearate and superfine silica powder accounting for 0.1-1% of the total weight of the formula, the SiO2 content of the superfine silica powder is 99% or above, the average particle size is 1-5 microns, and the particle size distribution span (D90-D10) / D50 is smaller than 0.5. The preparation method comprises the following steps: S1, heating the silica sand and the reclaimed sand to 125 + / -10 DEG C; s2, transferring the heated sand into a sand mixer, stirring at a low speed for 4 + / -0.5 min, adding superfine silica powder, and continuously stirring for 50 + / -10 s; s3, resin, urotropine and calcium stearate are sequentially added, and low-speed stirring is conducted for 180 + / -10 s; and S4, screening and cooling the mixed sand material, and bagging the mixed sand material after the mixed sand material reaches the normal temperature. By adding 0.1-1% of superfine silica powder, the high-temperature strength of the precoated sand is improved, sand mold cracking is reduced, the casting quality is improved, and meanwhile by adopting reclaimed sand, the cost is reduced.

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 application discloses a micro-smoke and odor-free cast steel environment-friendly regenerated coated sand process, which replaces a lubricant with hydroxyethyl ethylene bis-stearamide and corresponding auxiliary triisopropyl phosphate, significantly enhances the hot tensile strength and environmental protection of the coated sand, removes the solidified resin on the surface of the coated sand through a frozen shell breaking mode, greatly improves the shell breaking rate of the coated sand waste sand through modified aluminum nitride and preparation of a shell breaking auxiliary, and prepares a friction auxiliary to enhance the particle shaping of the coated sand regenerated sand, and further enhances the flowability of the coated sand prepared from the regenerated sand.

This utility model relates to the field of crushing device technology, specifically disclosing a crushing device for recovering coated sand, including a base, a crushing cylinder fixedly installed on the top of the base, a feeding channel fixedly connected to the top of the crushing cylinder, a rotating rod rotatably arranged inside the crushing cylinder, a uniformly distributed and symmetrically arranged cutting blade fixedly installed on the rotating rod, an arc-shaped filter plate arranged on the bottom surface of the crushing cylinder, a conveying channel fixedly connected to the bottom surface of the crushing cylinder at a point on the arc-shaped filter plate, a bottom cylinder fixedly connected to the bottom of the conveying channel, a movable disc rotatably arranged inside the bottom cylinder, a rotating rod 2 arranged inside the bottom cylinder, the rotating rod 2 arranged on the movable disc, a distributed and symmetrically arranged movable column fixedly installed on the rotating rod 2, and a magnetic column arranged inside the movable column. This crushing device for recovering coated sand can directly adsorb metal impurities in the crushed coated sand, improving the purity of the recovered coated sand and having strong practicality.

The present invention discloses a device and process for regenerating and reusing high-disintegrability water glass used sand. The device includes: a regeneration chamber and a beating and stirring device provided in the regeneration chamber for beating and stirring the old sand and causing friction between the old sand to cause the water glass film on the surface of the old sand to fall off. In addition, the feeding and discharging are improved in the process so that the powder and the detached film are discharged from the upper discharge port, and the treated old sand is discharged from the lower discharge port after two screenings, thereby greatly increasing the amount of the used sand that can be utilized. The present application provides a beating and stirring device that can rotate and revolve so that the old sand is struck and stirred in the regeneration chamber, causing friction. The multi-directional beating and friction can effectively cause the water glass film on the surface of the old sand to fall off. In addition, when discharging, by adding new material, the new material sinks, and the small particle material and the detached film rise and separate into layers, thereby being discharged from the upper layer. The de-filmed old sand is then discharged from the lower discharge port, thereby reducing the film content of the discharged old sand and improving the quality of the regenerated sand.

The invention relates to the technical field of casting equipment, and particularly discloses a molding sand treatment device for casting a tractor saddle support, which comprises a rack, a coarse sieve plate is arranged at the upper part of the rack, a screening mechanism and a cleaning mechanism are further arranged on the rack, the screening mechanism comprises a fine sieve plate, a crushing plate and an adsorption assembly, and the fine sieve plate is obliquely arranged below the coarse sieve plate; the crushing plate is obliquely suspended above the fine screen plate, a wedge-shaped crushing gap is formed between the crushing plate and the fine screen plate, the caking molding sand can be rubbed and crushed through reciprocating movement of the crushing plate, the adsorption assembly comprises a plurality of magnetic mounting plates arranged below the fine screen plate, and the cleaning mechanism comprises a scraper blade and a collecting box. The collecting box can push the vertically drooping mounting plate to turn over to a cleaning state, the scraping plate scrapes and sweeps the surface of the turned mounting plate, and the collecting box moves along with the scraping plate and collects scraped scrap iron; according to the invention, screening, crushing and iron removal operations in a non-stop state are realized, and the production efficiency is greatly improved.

The application discloses a collapsible water glass sand proportioning optimization device and method, and relates to the field of sand proportioning optimization devices.The device comprises: a stirring tank for stirring mixed materials; a spiral feeder comprising two and respectively used for adding old sand and new sand to the stirring tank; a reagent adding tank for storing reagents, which comprises two and stores the same reagents; a reagent adding device comprising two sets of piston type feeding devices and a driving device for driving the movement of the piston rods of the piston type feeding devices, the two sets of piston type feeding devices are respectively communicated with the two reagent adding tanks and are both communicated with the stirring tank, and the driving device asynchronously drives the two sets of piston type feeding devices so that when the driving device is turned on, one set of piston type feeding device always adds reagents to the stirring tank and the other set of piston type feeding device extracts reagents. The application firstly realizes uninterrupted feeding through the two sets of piston type feeding devices driven asynchronously; in addition, the rotation of the output shaft is bidirectionally controlled through the planet gear structure driven bidirectionally, which not only can amplify the number of rotation circles, but also can more finely control the feeding speed, which is beneficial to improve the accurate control of reagent adding; finally, the eccentric hinge position of the connecting rod is adjusted through the piston type sliding adjustment structure arranged on the eccentric disc to adjust the limit value of the adding amount, and the double adjustment mechanism is formed in cooperation with the rotation speed, which provides favorable conditions for adjusting the proportion in the proportioning process.

The utility model relates to the technical field of casting sand mixers, and discloses a casting sand mixer convenient to adjust discharge flow, which comprises a machine body, and a control box is fixedly mounted at the top of the machine body. A manual operation control panel can drive a rotating disc to rotate when sliding on the outer side of a fixed disc, a connecting rod is driven to slide on the surface of the rotating disc when the rotating disc rotates, and one end of a control block can be driven to move in the sliding direction of the connecting rod when the connecting rod slides, so that the control block moves towards the center point close to the fixed disc; when the discharging pipe rotates reversely, the hole diameter of the discharging pipe can be reduced, so that the discharging flow is reduced, on the contrary, the hole diameter of the discharging pipe can be enlarged when the discharging pipe rotates reversely, and the situation that the casting size deviates due to the fact that the amount of molding sand filled into a mold does not meet the design requirement when the flow is too large or too small during discharging of the discharging pipe is prevented. And the production efficiency and the working convenience are improved.

The utility model discloses a sand spraying machine for investment casting, which is characterized in that the upper end of a base is provided with a sand spraying barrel body, the side wall of the upper end of the sand spraying barrel body is provided with a fixing bracket for fixing a wax mold, the upper end of the sand spraying barrel body is provided with a sand screening mechanism, the sand screening mechanism comprises an annular sand screening plate, and the sand screening plate is inclined downwards from the outer end to the inner end; the sand spraying barrel body comprises a coarse material collecting cavity formed in the middle and a fine material collecting cavity formed in the outer end, a bottom plate of the coarse material collecting cavity is higher than a bottom plate of the fine material collecting cavity, the sand spraying machine further comprises a sand pumping mechanism used for conveying sand in the fine material collecting cavity to the position above the outer end of the sand screening plate, and the inner end of the sand screening plate extends to the upper end of the coarse material collecting cavity. According to the sand spraying machine, the sand spraying barrel body is divided into the coarse material collecting cavity and the fine material collecting cavity, fine materials fall onto a wax mold from screen holes of the sand screening plate to be subjected to sand spraying operation, coarse sand directly falls into the coarse material collecting cavity through the sand screening plate to be recycled, efficient screening, conveying and recycling of the sand are achieved, and the utilization efficiency of the sand is improved.