597results about "Moulding machines" patented technology

The application relates to the technical field of foundry molding, in particular to an aluminum alloy casting sand core molding machine; the machine comprises a base and a stand column fixedly connected to the rear position of the upper surface of the base; the upper end of the stand column is rotationally connected to a top base provided with an upper hydraulic cylinder; the lower end of the upper hydraulic cylinder is fixedly connected to a pressing plate; the front position of the upper surface of the base is fixedly connected to a support through a lower hydraulic cylinder; a plurality of electric push rods are embedded in the upper surface of the support; the upper surface of the support is provided with a mold plate provided with a mold sample and a rod groove; the mold plate drives a sand frame to move up and down in a hopper through control, so that a pressing strip can repeatedly beat the coated sand on the upper end of the sand frame, and the hopper assists the coated sand on the upper end of the sand frame to be supplemented, the coated sand in the sand frame is more compact and uniform in filling and pressing, the quality of the formed sand mold is improved, and compared with manual filling and pressing, the machine is more efficient and convenient.

The invention provides a brake disc air duct core and a manufacturing method thereof and a core box device, and relates to the technical field of casting devices.The brake disc air duct core is characterized in that a plurality of strip-shaped air ducts are evenly formed in the surface of a sand core body, the air ducts extend from the center of the sand core body to the edge, and the sand core body protrudes around the periphery of the sand core body in the vertical direction to form an outer ring core head; the middle of the sand core body protrudes in the vertical direction to form a middle core head, a protruding sand shooting face is arranged at the top of the middle core head, the middle core head and the bottom of the sand shooting face are hollow to form a middle sand core runner, and the technical problems that in the prior art, filling is insufficient in a thin-wall area or the edge, and the forming effect is poor are solved. The technical effect of improving the forming rate and the structural stability is achieved.

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.

The invention relates to the technical field of casting processing, in particular to a core shooter convenient for die replacement, which comprises a lower die, an upper die, a first moving module and a base frame, the first moving module is arranged on one side of the base frame, the upper die is detachably mounted on the first moving module, and a template seat is mounted on the base frame through a second moving group; a plurality of vertical holes B are uniformly distributed in the template seat, two vertical holes A are formed in the template seat, and a frame body A and a frame body B are arranged at the bottom of the template seat; two positioning pins are fixed to the frame body A and installed in the corresponding vertical holes A in a telescopic and sliding mode respectively, and two positioning holes A are formed in the bottom of the lower die. Moving-in and moving-out of the mold are completed by matching the movable transfer table with the mold plate base, translation replacement of new and old molds is achieved, a traditional hoisting operation mode is replaced, the shaking and falling risks in the hoisting process are avoided, the safety of mold replacement operation is improved, meanwhile, the mold transfer path is simplified to a two-dimensional plane from a three-dimensional space, and the production efficiency is improved. And the die changing process is stable and controllable.

The utility model relates to a through-type drawing device for a plurality of large iron molds with different cavities, and belongs to the field of machinery. The device comprises movable trolley tracks, a lifting travelling crane, a plurality of movable trolleys, a fixed iron mold and a model drawing separation mechanism, the movable trolleys are all arranged on the movable trolley tracks, the movable trolley tracks are arranged on the two sides of the fixed iron mold and the model drawing separation mechanism, the lifting travelling crane is arranged above the fixed iron mold and the model drawing separation mechanism, and the lifting travelling crane is arranged above the fixed iron mold and the model drawing separation mechanism. Two rails are installed on a base in the fixed iron mold and model drawing separation mechanism, drawing supports are fixed to the two sides of the rails, two lifting drawing hydraulic cylinders are installed in the upper plane of each drawing support, a plurality of clamping mechanisms are fixed to each drawing support, and two drawing beams are fixedly connected through two drawing supporting beams. The device is reasonable in structural design, convenient to install, reliable in operation, low in labor intensity, high in mechanization degree, good in drawing quality of an iron mold casting mold, smooth in technological process and capable of meeting use requirements.

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 invention relates to the technical field of casting, in particular to a precision casting shell making machine which comprises a hoisting part. The hoisting part comprises a driving piece and a hoisting mechanism, the hoisting mechanism is mounted on the driving piece, and the hoisting mechanism comprises a shell, a hanging basket, a sensing assembly and two hanging rods. The two hanging rods are eccentrically arranged on the shell and can rotate along with the shell. The hanging basket comprises a main rod and two hanging arms, and the main rod is connected with a fired mold; and the suspension arm is connected with a lifting hook on a corresponding suspension rod. The induction assembly is installed on the shell. According to the precision casting shell making machine, the axial relative displacement of the suspender is monitored through the induction assembly, eccentricity of a fired mold is fed back, after workpieces in the same batch are cast for multiple times, position exchange is achieved through rotation of the suspender and the shell, the suspender on the high-abrasion side and the suspension arm on the low-abrasion side can be matched again, the abrasion degree of the two sides is balanced, and the precision casting shell making machine is suitable for large-scale production. And the service life of the whole hoisting part is prolonged.

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.

The invention discloses an automatic sand cake forming device and method, and belongs to the technical field of sand cake manufacturing. The device comprises a stirring mechanism, a conveying mechanism, a forming mechanism and a tamping mechanism, and automatic production is achieved through double-station alternate operation and numerical control layered tamping. The method comprises the steps of material mixing, mortar conveying, metering and drying, double-station alternate tamping and curing demolding. According to the scheme, manpower input is reduced through full-process automation, the production efficiency is improved through the double-station rotary workbench, the consistency of the sand cakes is guaranteed through the numerical control system, and the method is suitable for high-precision large-scale manufacturing of the composite material winding pressure container core mold.

The invention relates to the technical field of full mold casting, and provides an evanescent mode dry sand negative pressure molding process, EPS particles are doped with nanometer silane modified silicon dioxide with the mass percentage being 0.5% of that of the EPS particles, so that the strength of a foam model is improved by 20%, the heat deformation temperature is increased to 80 DEG C, and deformation in the molding and pouring process is reduced. The coating of the bottom layer of the model adopts 20% of bauxite and 5% of carbon fibers to be matched with a water-based binder, so that the air permeability is enhanced, and the coating of the surface layer of the model adopts 60% of emery and 10% of silica powder to be matched with a water-based binder, so that the fire resistance is improved. Pre-jolt ramming and main jolt ramming are carried out after sand filling, so that the compactness uniformity of dry sand is improved to 95% or above; sealing is carried out, main vacuumizing and auxiliary vacuumizing are carried out, the vacuum degree sealing performance during pouring is guaranteed, then pouring forming is carried out, and the vacuum degree is monitored in the pouring process, so that the stability of the vacuum degree in the pouring process is guaranteed; and finally cooling and releasing negative pressure to obtain the casting.

The invention relates to the technical field of sand core molds, and discloses a casting forming sand core mold which comprises a base and two sand core mold bodies. The two sand core mold bodies are arranged on the base and can be far away from or close to each other, and cavities are formed in the adjacent sides of the two sand core mold bodies; a loading piece is mounted at the top of the base, and a ceramic core bar and a core bar are loaded on the loading piece; and after the two sand core mold bodies are close to each other and are combined, the loading piece, the ceramic core bar rod and the core bar are arranged in the cavities in the two sand core mold bodies. The ceramic core bar rod is pre-embedded in the sand core, the characteristics of good high-temperature stability and high bending strength of the ceramic core bar rod are utilized, internal support is formed for the sand core in the molten iron pouring process, and deformation of the sand core in the vertical direction caused by thermal shock and molten iron buoyancy is effectively restrained, so that the size precision of a hydraulic part control valve main body casting is improved; and the subsequent processing correction and scrap cost is reduced.

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.

This invention provides a technology that improves the flexibility of layout in casting equipment related to mold forming. [Solution] The molding system comprises a mold-making machine that molds upper and lower molds and pushes the upper and lower molds onto a platen trolley located at the mold extrusion position among a plurality of transported platen trolleys, and a jacket covering device that covers the upper and lower molds on the platen trolley located at the mold extrusion position with a jacket.

The application discloses an engine cylinder body lost foam mold modeling device and a casting method. A plurality of modeling units are arranged in the form of an annular array, and each adjacent modeling unit has a spacing a. The modeling unit comprises a lifting linear degree of freedom, a feeding linear degree of freedom and a universal linear degree of freedom, and a seismic source for modeling. For each cell i, the following steps are performed: calculating the temperature gradient of the cell i using the temperature value difference calculation in the Moore neighborhood Ni. The technology provided by the application uses a temperature sensor to monitor the temperature distribution inside the mold in real time, calculates the rate prediction value through a cellular automaton, and thus realizes accurate control of fluid flow. Based on the prediction ability of the temperature distribution, the fluid flow situation can be predicted in advance, and corresponding control can be performed to ensure the casting quality.

The invention discloses a twice wax coating injection molding mold for a wax mold with a ceramic core, and belongs to the technical field of wax mold molding. In order to solve the problem that an existing product is large in manual burden in the wax mold preparation process, the following technical scheme is provided, the wax mold forming device comprises a bottom plate and a plurality of electric push rods arranged on the bottom plate, a top plate is jointly installed at the output ends of the electric push rods, and a limiting plate is arranged at the top of the top plate. The multiple electric push rods are arranged to drive the top plate to ascend and descend, the overturning assembly and the auxiliary frame are combined to achieve opening, closing and overturning of the top mold, existing manual mold disassembling and assembling operation is replaced, workers can more conveniently clean the top mold and smear a release agent through automatic overturning after the top mold is opened, and the adjusting assembly is arranged on the bottom mold, so that the mold disassembling and assembling efficiency is improved. And the positioning piece arranged on the auxiliary frame is matched, so that the side mold blocks on the bottom mold are automatically opened and closed in the push-pull displacement process of the bottom mold, the formed wax mold is further conveniently taken, and the burden of workers is relieved.

This invention relates to the field of casting technology for sand cores and sand shells, and particularly to a method for preparing high-precision casting sand cores and sand shell components based on a coated sand process. The method includes the following steps: rinsing quartz sand and reacting it with a sodium silicate solution to obtain coated quartz sand; adding 3-aminopropyltriethoxysilane and water to the coated quartz sand in a high-speed mixer; sequentially adding modified benzoxazine resin, calcium citrate, magnesium chloride, hyperbranched polyamide, and polycaprolactone-grafted starch to obtain finished coated sand; plasma-treated chromium-12 molybdenum-vanadium mold steel to obtain an amino-modified mold; sand-jetting the finished coated sand into left / right half-shells; shaping and pre-embedding chromite sand cores with chills to obtain left / right half-shell green blanks; milling the surfaces of the left / right half-shell green blanks, coating them with resin, butt-jointing, curing, and deburring to obtain the casting sand core and sand shell. This method solves the problems of poor mechanical strength, poor high-temperature stability, low production efficiency, and poor environmental performance in high-precision casting sand cores and sand shells.

The utility model discloses a sand filling device for V-process casting, which belongs to the technical field of vacuum casting and is characterized in that a swing frame is movably mounted at the top of a base, a swing motor is mounted on the inner wall of the base, and a half gear intermittently meshed with a toothed plate is mounted at the output end of the swing motor; a sand box is installed in the swing frame, an inserting plate is movably installed on one side of the swing frame, and a positioning air cylinder is installed on the outer wall of the inserting plate. The output end of the adjusting motor is connected with a threaded rod; a moving frame located above the swing frame is arranged between the threaded rods in a threaded mode, a compaction air cylinder is installed at the top of the moving frame, and an extrusion plate is arranged at the output end of the compaction air cylinder. According to the utility model, the swinging frame can be driven to reciprocate relative to the top of the base, so that the sand box vibrates regularly. The sand box can be fixed through the detachable inserting plate and the positioning air cylinder, so that the requirement for sand boxes of different specifications is met, the motor is adjusted to drive the moving frame to reciprocate along the swing frame, filling sand is compacted, and the practicability and the freedom degree are improved through the design.

The utility model discloses a guide element loam core mold with multiple sand shooting ports, which relates to the field of loam core molds and comprises a mold core, a mold body is coaxially arranged on the mold core, and the mold body and the mold core are pressed to form a forming cavity; the mold further comprises a plurality of blade molds, the blade molds are annularly arranged in the forming cavity and equally divide the middle of the forming cavity into a plurality of cavities, the sand shooting openings are annularly formed in the top of the mold body and correspond to the cavities one to one, and the sand shooting openings are connected with the cavities. According to the guide part mud core mold with the multiple sand shooting openings, efficient and uniform sand shooting forming can be achieved, the defect of a precoated sand mud core caused by uncompacted sand filling is avoided, and the forming quality of the precoated sand mud core of the guide part is ensured.

The vibrating screen for the vertical sand spraying machine comprises a screen frame, a screen plate, a drainage partition plate, a vibrator and a flow guide pipe, the screen plate is arranged at the bottom of the screen frame, screen holes are evenly formed in the screen frame and the screen plate respectively, and the vibrator is arranged on the outer wall of one side of the screen frame; an integral structure formed by connecting the screen frame and the screen plate is obliquely arranged, the drainage partition plate is arranged in the integral structure formed by connecting the screen frame and the screen plate, and the portions, located on the two sides of the drainage partition plate, of the screen plate are provided with a feeding position and the flow guide pipe correspondingly; an opening is formed in the side, away from the feeding position, of the drainage partition plate. The vibrating screen has the advantages that the vibrating screen is simple in overall structural design, effective separation of sand grains and sand bumps is achieved with extremely low cost, the blocking frequency of the screen plate is remarkably reduced, the noise reduction effect is greatly improved, the failure rate of a sand spraying machine is reduced, and uniformity in the sand spraying process is achieved.

The utility model discloses a kind of preheating tool of core box, including tool body, positioning structure and clamping device, positioning structure is fixedly connected with tool body, core box is placed between positioning structure and clamping device, and the clamping of core box is realized by pushing clamping device to be close to or away from positioning structure and loosening;Tool body is provided with guide slot, and the relative sliding of tool body is realized by the cooperation of clamping device and guide slot;Clamping device includes two first columns oppositely arranged, and the fixed seat of two first columns is cooperated with the both sides of core box respectively.The preheating work of the core box can preheat core box, improve the working efficiency of core shooting machine.

This invention discloses a sand mold forming die, relating to the field of mold equipment technology. The forming die can form a mold body from molding sand in one step, and two sets of mold bodies can be joined to form a complete sand mold. Specifically, it includes: a bottom mold, a top mold, and an interface plate. The bottom mold has a first shaping surface for forming the external shape of the mold body, and the top mold has a second shaping surface for forming the internal shape of the mold body. When the bottom mold and the top mold are joined, the first shaping surface and the second shaping surface are opposite each other. The interface plate is movably placed on the first shaping surface to form a connecting part on the outside of the mold body during molding. After the mold bodies are joined to form a sand mold, different sand molds can be connected in series through the connecting part. This invention can use a single type of mold to manufacture different types of mold bodies that can be joined together, greatly improving the preparation efficiency and economic benefits of sand molds.

The utility model relates to a sand core making machine, and discloses a sand core ejection structure of a vertical sand core making machine, which comprises an equipment frame, a first mounting part, a second mounting part, four connecting columns, a group of springs, a third mounting part and an oil cylinder. At the beginning, the upper mold is in an upper limit position, and at the moment, the first ejector rod of the third mounting part penetrates out of the upper frame body, acts on the connecting part and overcomes the spring, so that the second ejector rod of the ejection part exceeds the mold cavity of the mold part. And then, the oil cylinder enables the upper mold to move downwards, before the upper mold and the lower mold are closed, the first ejector rod is separated from the connecting part, and under the action of the spring, the second ejector rod recovers to be flush with the mold cavity of the mold part. And then, the upper mold continues to move downwards to be closed with the lower mold, a sand shooting hole is formed in the side wall of the mold, and a sand shooting cylinder shoots sand into the mold from the sand shooting hole. And finally, the oil cylinder enables the upper mold to move upwards and restore to the initial state, and the second ejector rod ejects the sand core in the mold cavity of the lower mold upwards, so that the sand core is separated from the mold cavity.

The invention provides an automatic material receiving device for a core shooter, which belongs to the technical field of core shooters, comprises a material receiving bracket, and is characterized in that a material receiving conveying module is arranged on the material receiving bracket, a protection box is arranged on the outer side of the material receiving conveying module, an air exhaust module is arranged on the protection box, and a refrigeration module is arranged on the air exhaust module; an exhaust cooling module is arranged on the refrigeration module, and a cold water supply module is arranged on one side of the refrigeration module. The automatic material receiving device for the core shooter solves the problems that an existing automatic material receiving device for the core shooter is poor in cooling effect, low in cooling speed and not beneficial for subsequent personnel to take.

The utility model belongs to the technical field of machining auxiliary tools, and provides an automatic carrying mechanism for cylinder body sand core blanks, which is labor-saving and quick to use and also reduces the blank breakage rate. Comprising an industrial mechanical arm, a workpiece fork, a first in-position monitor, a core rod removing plate, a chain scraper conveyor and a core shooter, a discharging track is arranged at an outlet of the core shooter, one end of the discharging track is located in the core shooter, the other end of the discharging track is located outside the core shooter, and a blank output trolley is installed on the discharging track; a first in-place monitor is installed at the position, away from a core shooter body, of an outlet rail of the core shooter, an industrial mechanical arm, a core rod removing plate and a chain scraper conveyor are fixedly installed on one side of the outlet rail of the core shooter, and a workpiece fork is installed at the arm end of the industrial mechanical arm. The core rod removing plate is structurally characterized in that a thin plate is mounted at the upper end of a bracket fixed on the ground.

The application relates to the technical field of casting, in particular to a resin sand molding mold stripping device convenient for large casting, which has the following technical scheme: an annular track is arranged on the ground and below the horizontal plane, an inner surrounding area of the annular track is used to form a placing station for placing a mold and a sand box; a positioning assembly is slidably arranged in the annular track; and a pressing assembly is arranged on the positioning assembly, the positioning assembly is used to drive the pressing assembly to move above lugs on the periphery of the mold, and the pressing assembly is used to press the lugs of the mold to fix the mold. The application has the advantages that manual knocking on the mold is not needed for many times, the mold is not easily damaged, the whole process is fast and convenient, the stripping action can be completed only by once hoisting, the production efficiency and the overall molding quality are improved.

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

The invention relates to the technical field of warehousing, and discloses a motor with a casting shell and a stamping end cover, the motor comprises the casting shell and the stamping end cover, the motor shell is manufactured by adopting a casting process, the requirements of a complex structure and high strength can be met, meanwhile, the stamping end cover is adopted, and the advantages of high production efficiency and low cost of the stamping process are utilized; the magnetic field of the magnetic rods can guide cooling airflow to flow along a specific path to directly take away heat in the inner cavity of the casting shell through gaps among the rectangular phase change microcapsules, and the strip-shaped frames are annularly arranged, so that the multiple sets of strip-shaped phase change microcapsules can form a wrapping type heat dissipation interval from the outer portion of the second bearing area. When gas passes through the heat absorption mesh enclosure, part of heat is conducted to the heat absorption mesh enclosure, and the heat absorption mesh enclosure absorbs the heat and conducts the heat to the annular chuck for centralized heat dissipation, so that overheating of the second bearing area is reduced, the load temperature of the motor rotor part is prevented from being too high, and long-term use of the motor is guaranteed.

The invention provides a casting mold molding device and a casting mold molding method, which can reduce the driving force required for rising an extrusion table and realize large energy conservation. The present invention is a casting mold molding machine for molding a casting mold by compressing casting sand filled in a casting frame, the casting mold molding machine being provided with: a pressure application unit that comes into contact with the casting sand; an extrusion table which is provided so as to face the pressure application unit and on which a carrier plate on which the casting frame overlaps is mounted; and a pressurization driving device which is provided above the pressurization implementation unit, and which causes the pressurization implementation unit to approach the extrusion table to compress the casting sand filled in the casting frame, the extrusion table being provided with: an extrusion table raising / lowering device which raises the extrusion table from the standby position to a compression start position above the standby position; and a descending restricting device for restricting the descending of the pressing table against the pressing force during compression by the pressing driving device in the pressing table which is lifted to the compression starting position.

The utility model discloses a casting molding compaction mechanism based on pressure feedback, which comprises a frame and a working plate in bolted connection with the bottom of the frame, the top of the working plate is provided with a molding compaction die, the frame is an L-shaped frame, and the side wall of the frame is in bolted connection with a compaction driving mechanism for driving the molding compaction die to move up and down to realize mold closing compaction. The pressure feedback device is arranged, the pressure sensor is used for detecting the compaction pressure in real time, data are transmitted to the data processing unit to be analyzed and processed, the driving motor can be accurately controlled, real-time adjustment of the compaction pressure is achieved, the problem that a traditional compaction mechanism is not accurate in pressure control is solved, and the compaction efficiency is improved. And the multiple pressure sensors evenly distributed in the compaction mold can comprehensively and accurately detect the pressure, the situation that the compaction effect is not uniform is effectively avoided, and the quality stability of casting forming is improved.