36 results about "Lost-wax casting" patented technology

The invention discloses a shell making machine for lost wax casting, and relates to the technical field of lost wax casting, the shell making machine comprises a circulating conveying line, and a first slurry dipping assembly and a sand spraying mechanism which are sequentially arranged along the conveying direction of the circulating conveying line, and the bottom surface of a moving part of the circulating conveying line is fixedly connected with uniformly distributed suspension assemblies; the suspension assembly comprises a fixing rod synchronously moving along with a moving part of the circulating conveying line, the bottom end of the fixing rod is rotationally connected with a telescopic part which stretches out and draws back vertically, the bottom end of the telescopic part is detachably connected with a lifting tool, the first slurry dipping assembly comprises a slurry dipping barrel and a lifting power device driving the telescopic part to ascend and descend, and the lifting power device drives the telescopic part to ascend and descend. And the slurry dipping barrel is correspondingly arranged below the lifting appliance. According to the shell making machine for lost wax casting adopting the structure, a wax mold can be conveniently taken and placed, shutdown and production halt are not needed when the wax mold is taken and placed, and the working efficiency is high.

The invention provides a complex runner impeller pump machining method based on a wax pattern model, which comprises the following steps: calculating geometric width and curvature change values of a runner according to casting deviation estimation data, and if the change values exceed a design tolerance range, correcting boundary conditions of an initial wax pattern model through an iterative optimization algorithm, and determining optimized wax pattern model data; a numerical control machining path is generated after optimized wax pattern model data is obtained, the feeding speed and cooling parameters of a cutter are dynamically adjusted in combination with real-time feedback information of a temperature sensor, and a precision machining instruction sequence is obtained; simulating a virtual casting process from the precision machining instruction sequence, judging whether the geometric consistency of the flow channel meets the fluid efficiency requirement or not, and if not, backtracking to a deformation prediction data stage for recalculation to obtain a final casting parameter set; and an automatic pouring system is driven through the final casting parameter set to execute lost wax casting, real-time dimensional deviation is monitored, the position of a mold is automatically calibrated, and a high-precision complex-runner impeller pump casting is obtained.

The present invention belongs to the technical field of lost wax casting, and specifically is a lost wax casting shell making device, comprising a machine base; two fixed columns are fixedly connected to the top of the machine base; a drying box with multiple output end electric heaters is provided to dry and solidify the wax trees that are suspended and transported, so as to achieve the effect of non-stop drying and shell making of the wax trees on the barbecue grill, thereby reducing the situation where the workpiece is not dried and solidified after sanding, resulting in difficulty in firm adhesion of powder on the surface of the wax mold; the wax trees are uniformly dried synchronously from different angles through the multiple output ends of the electric heater, and symmetrical air supply at the four corners can form a three-dimensional circulating airflow, avoiding uneven drying caused by unilateral air supply, and preventing the shell from generating stress cracks due to excessive local drying, thereby improving the effect of drying and solidifying the wax trees; the method of hanging, conveying, drying and solidifying the wax trees composed of the barbecue grill by a ring conveyor can avoid adhesion of the wax trees to the contact surface, thereby ensuring drying efficiency and reducing the risk of wax mold deformation.

The utility model discloses a special fixture for a wax tree for casting small parts by a lost wax method, which comprises a base part, a wax rod fixing unit, a rotating unit and a tightening unit, the base part further comprises a base, a base chute is arranged on the base, and the wax rod fixing unit is connected onto the base chute; the base is further connected with a hinge, and the hinge is connected with a movable bottom plate; a rotating unit is mounted on the movable bottom plate; the rotating unit further comprises a rotating top cover, and a top cover internal gear is arranged in the rotating top cover. The rotary top cover can rotate along with the gear in the top cover; a clamping unit is further installed over the rotating unit. The clamping unit further comprises a matching straight gear, a clamping claw installation groove is formed in the matching straight gear, a clamping claw is installed on the clamping claw installation groove, and the clamping claw can move along the inner contour line of the clamping claw installation groove.

This invention belongs to the field of numerical simulation of investment casting, and relates to a high-precision numerical simulation method, system, and product for the wax pattern filling process of investment casting. The method includes updating boundary conditions and determining the time step Δt; solving for the flow field, temperature field, and updating the viscosity based on the known field quantities of the current time step; the known field quantities include the flow field and temperature field obtained in the previous time step; performing interface tracking based on the flow field to obtain the free surface between the wax and air, thereby distinguishing between filled and unfilled areas; determining whether to continue time progression according to a preset filling ratio; if time progression is stopped, outputting the results of the flow field, temperature field, viscosity field, and the change of the free surface over time during the entire wax pattern filling process.

1. The name of the design product: gypsum vacuum casting integrated machine. 2. The use of the design product: for jewelry lost wax casting integrated machine. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. The design product is not common from the bottom view, so the bottom view is omitted.

The utility model relates to a shot blasting tool for casting an impeller pump shell by a lost wax method. The shot blasting tool is characterized by comprising a positioning shaft, a rotary tray, a limiting unit and a driving module, according to the utility model, the rotary tray structure of which the direction can be manually adjusted is adopted to support the impeller pump shell for shot blasting treatment, so that the angle of the impeller pump shell can be adjusted, and a treatment omission area is avoided; besides, a limiting guide groove is formed in the surface of the rotary tray, a spring is connected with a limiting check block, the limiting check block is tensioned through elastic potential energy of the spring, the end of the limiting check block can penetrate through a center position hole of the impeller pump shell, and the edge of the center position hole of the impeller pump shell is tensioned and limited. And it is guaranteed that the impeller pump shell is in a stable state in the shot blasting treatment process.

Catheters and methods for manufacturing using modified lost wax casting are provided. The catheters may be formed using 3D printing to create a mold of a catheter within a consumable crucible. Plaster is added between the crucible and the catheter and then the print is burned out forming a layered void. Once the print is removed, a polymer is added to the layered void and the plaster is removed.

The present invention relates to the field of 3D printing technology, and discloses a multi-device collaborative operation control system for 3D printing of jewelry, including an analysis and parameter adjustment module, a model manufacturing module, a scanning and inspection module, a data sharing module, a mold construction module, a finished product casting module, a finished product quality inspection module, and a recycling module; the analysis and parameter adjustment module obtains and sorts triangular patches for the complex structure of the jewelry STL model, and adaptively generates a layer parameter table; the model manufacturing module prints a jewelry resin model based on the layer parameter table; the scanning and inspection module inspects the model, uses a defect recognition network to generate problem labels for unqualified models and autonomously selects adjustment solutions, improving the stability and automation of the printing process; the finished product quality inspection module monitors the quality of jewelry finished products by combining image recognition technology and traditional measurement technology, melts defective products through the recycling module, and re-obtains precious metal raw materials, ensuring the quality of jewelry finished products and reducing the cost of the lost wax casting process.

To provide a method for manufacturing a lost wax pattern capable of easily manufacturing the lost wax pattern.SOLUTION: The manufacturing method includes a designing step of designing a designed lost-wax pattern 21 having a provisional rest portion 211 having a size to form a gap S with respect to an inner peripheral wall 10A of a rest seat image 13A formed on a model image 131A, based on the model image 10A displayed on a display 4, a shaping step of three dimensionally shaping the designed lost-wax pattern 21, a hardening step of hardening the designed lost-wax pattern 21, and a correcting step of correcting the provisional rest portion 211 to a rest portion 201 suitable for a rest seat 13 by filling the gap S between the provisional rest portion 211 and the rest seat 13 with wax 22 in a state where the designed lost-wax pattern 21 is fitted to a model 10, thereby completing a lost-wax pattern 20.SELECTED DRAWING: Figure 11

The application discloses a runner wax mold, a wax mold shell assembly and a thin product lost wax casting method. The runner wax mold is internally provided with a cavity, and the runner wax mold is provided with a pore communicating the cavity with an external environment, and the pore is sealed by bonding wax with a lower melting point than the runner wax mold. In the thin product lost wax casting method, firstly, a product wax mold and the runner wax mold are prepared; then, the runner wax mold is connected with at least one group of product wax molds to form a wax tree; then, ceramic slurry is coated on the surface of the wax tree and solidified into a ceramic mold shell; then, the wax mold shell assembly is placed in a dewaxing kettle, a high-temperature environment capable of causing the bonding wax and the product wax mold to melt in sequence is arranged in the kettle, a high-pressure environment capable of causing the molten wax to flow into the cavity along the pore is arranged, and the process is continued until the wax tree is completely melted and discharged from the ceramic mold shell; finally, the thin product is cast in the ceramic mold shell. The thin product lost wax casting method can avoid the damage of the ceramic mold shell caused by the expansion of the product wax mold.

The present invention provides a steam dewaxing system for investment casting, comprising: a basket; a track, which is arranged in a cyclic manner; a loading mechanism for carrying the basket loaded with the modules to be dewaxed; a dewaxing kettle, which is of a through-type structure; a feeding translation mechanism for transferring the basket on the loading mechanism into the dewaxing kettle; a discharging mechanism for carrying the basket after dewaxing is completed; a discharging translation mechanism for transferring the basket from the dewaxing kettle to the discharging mechanism; and an empty basket translation mechanism for transferring the basket on the discharging mechanism to the loading mechanism through a third moving platform. The present invention is mainly applicable to the dewaxing process of investment casting. Different from the inefficient dewaxing production mode of the traditional single-machine dewaxing kettle, the present invention is a through-type cyclic continuous production line with a cyclic basket-returning production mode, which greatly reduces the labor intensity of workers. It can allow multiple baskets to enter and exit the dewaxing kettle simultaneously, and has the advantages of convenient loading and unloading, high degree of operation automation, high dewaxing efficiency and high energy consumption utilization rate.

The present invention relates to the field of digital mold design and 3D printing, and can be combined with manufacturing methods such as casting, cement pouring, injection molding, powder metallurgy, sintering, traditional incense cards, gypsum aromatherapy, and ceramic firing, and discloses a manufacturing process using a digital mold. The process refers to lost wax casting, and generates a three-dimensional model of the "cavity casting mold" of the lost wax method by digital technology. It combines the flexibility of 3D printing technology and the efficiency of the casting process, and aims to achieve efficient, high-precision, and low-cost production of different materials and complex structures. Specifically, the present invention first uses modeling software to perform Boolean operations on the target product, and then performs shell extraction and optimization to generate three-dimensional mold data with complex shapes and details. Subsequently, the data is imported into a 3D printer, and a mold corresponding to the three-dimensional model data is constructed by printing layer by layer. After the necessary post-processing, the mold can be used in the manufacturing process.

The present application relates to the technical field of investment precision casting, in particular to a wax mold, a preparation method and application of an investment casting casting. The wax mold is provided with at least one process hole, the process hole is a through hole; the height of the process hole is 15-20 mm with the wax mold as a base surface; the process hole has a flange, the thickness of the flange is 5-10 mm; the wax mold further comprises at least one blocking wax piece, the blocking wax piece is matched with the size of the process hole. The present application can effectively prevent the shell from bulging, and the process hole of the shell generated at the same time is closed during subsequent shell blocking, and the casting does not need to be welded and blocked after pouring. The poured casting has no process hole and does not need to be repaired. The purpose of controlling the bulging deformation of the photosensitive resin shell and the casting without the process hole can be achieved.

1. The name of the design product: museum bronze ware simulation production popular science interactive device. 2. The use of the design product: for bronze lost wax method manufacturing process and related knowledge popularization in museum scene. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The utility model discloses a lost wax casting shell breaking device, which belongs to the technical field of casting demoulding and comprises a table, a workbench is fixedly arranged on the top surface of the table, baffles are symmetrically and fixedly arranged on the top surface of the workbench, sliding grooves are transversely formed in the upper half parts of the opposite side surfaces of the two baffles, and sliding plates are arranged in inner cavities of the two sliding grooves in a sliding manner. A connecting plate is fixedly arranged on the bottom faces of the two sliding plates and located between the two baffles, arc-shaped blocks used for pushing a shell are symmetrically and fixedly arranged on one side face of the connecting plate, the connecting plate and the two arc-shaped blocks are in friction contact with the top face of the workbench, and clamping plates used for fixing the automobile casting are symmetrically arranged between the two baffles. And one side faces of the two baffles are each provided with an empty groove allowing the corresponding clamping plate to penetrate through, and the top face of the workbench and the opposite sides of the two baffles are each provided with an inclined face used for conveying a shell. According to the lost wax casting shell breaking device, the problem that scattered and falling shells are difficult to clean is solved, and the subsequent influence on automobile casting breaking is reduced.

The invention belongs to the technical field of lost wax casting, and particularly relates to a lost wax method casting shell making device which comprises a machine base. The top end of the machine base is fixedly connected with two fixing columns. The drying box with a plurality of output end electric heaters for heating is arranged to dry and cure the wax tree which is conveyed in a suspended mode, the effect of drying and shell making on the grill wax tree without shutdown is achieved, and the situation that powder on the surface of a wax mold is difficult to adhere firmly due to the fact that a workpiece is not dried and cured after sanding is reduced; a wax tree is synchronously and uniformly dried from different angles through a plurality of output ends of an electric heater, three-dimensional circulating airflow can be formed through four-corner symmetrical air supply, uneven drying caused by single-side air supply is avoided, stress cracks caused by too fast local drying of a mold shell are prevented, and therefore the wax tree drying and curing effect is improved; by means of the mode that the wax trees composed of the grills are hung, conveyed, dried and solidified through the annular conveyor, adhesion of the wax trees and the contact face can be avoided, the drying efficiency can be guaranteed, and the wax mold deformation risk can be reduced.

The utility model provides a wax injection device and relates to the technical field of lost wax casting. Comprising an equipment base, a conveying belt is arranged in the equipment base, a first positioning frame is fixedly installed on the equipment base, a second positioning frame is fixedly installed on the first positioning frame, a wax injection mechanism is fixedly installed at the upper end of the first positioning frame, the wax injection mechanism comprises a wax injection cylinder fixed to the first positioning frame, and a piston is movably installed in the wax injection cylinder; a wax inlet and a wax outlet are fixedly formed in the bottom of the wax injection barrel, one-way valves are arranged in the wax inlet and the wax outlet, a driving assembly is connected to the second positioning frame and comprises a driving air cylinder fixed to the second positioning frame, a lifting column is fixedly installed at the lower end of the driving air cylinder, and a cross beam frame is fixedly installed at the upper end of the lifting column. The driving assembly can drive a piston on the wax injection mechanism to move up and down, so that automatic wax injection is achieved, the wax injection head can be driven by the cross beam frame to move downwards before wax injection, the wax injection head is inserted into a pouring gate on a mold, and automatic butt joint of the wax injection head and the pouring gate of the mold is achieved.

The utility model discloses a ceramic shell cleaning device for lost wax casting, which relates to the technical field of lost wax casting and comprises an equipment box body, an outer shell is fixedly mounted on the inner wall of the rear side of the equipment box body, the outer shell is composed of an outer net cylinder and a plurality of L-shaped connecting frames, and the L-shaped connecting frames are symmetrically and fixedly mounted at the rear end of the outer net cylinder. A cleaning assembly is fixedly installed on the outer net cylinder and composed of an annular pipe, a plurality of installation pipes, connecting pipes and water spraying nozzles, the installation pipes are fixedly installed on the annular pipe in a pairwise symmetrical mode, the connecting pipes are also fixedly installed on the annular pipe, and the water spraying nozzles are fixedly installed on the installation pipes respectively. A rotary beating assembly is installed on the equipment box and located on the inner side of the outer shell, by arranging the outer shell, the cleaning assembly and the rotary beating assembly, a ceramic shell wrapping the outer side of a casting can be efficiently smashed, meanwhile, the cleaning effect is good, and therefore the lost wax casting efficiency can be guaranteed.

The utility model aims to provide a shell-making wax mould structure, which comprises a mould head and a supporting assembly, a shunting block is arranged at one end of the mould head, the diameter of the mould head is gradually reduced towards the shunting block, the supporting assembly comprises a main column, an end block and a plurality of supporting columns, two ends of the main column are respectively connected with the shunting block and the end block, each supporting column is divided into two groups, and the supporting columns are connected with the main column. The two sets of supporting columns are located on the two sides of the main column respectively, the two ends of each supporting column are connected with the flow dividing block and the end block respectively, and the main column and the supporting columns are used for being independently or jointly connected with a plurality of wax pieces respectively. Thus, the shell making wax mold structure is suitable for mounting wax pieces of different sizes instead of being limited to a certain wax piece of a single size, and the universality is good; in addition, a plurality of wax pieces can be installed at the same time, and each wax piece can form a casting, so that a plurality of castings can be formed on the shell-making wax mold structure, and compared with shell-making and casting of a single wax piece in the prior art, the shell-making wax mold structure can effectively improve the lost wax casting efficiency.

Manufacture and use of a refractory casting core The invention relates to a method for manufacturing a refractory casting core, said method comprising the additive manufacturing of a first and a second element each incorporating a refractory powder, said first and second elements each having one or more channels, the insertion of one or more refractory rods into said channels to connect the first and second elements, and the sintering of the first and second elements. It also relates to the use of the refractory casting core obtained according to this method in a casting process. Figure for abstract: Fig. 1.

The invention discloses an excavator bucket tooth production method adaptive to different working conditions, and relates to the technical field of engineering machinery part manufacturing, the method comprises the following steps: firstly, collecting material characteristics, environmental parameters and efficiency requirements of a target working condition, and establishing a working condition-bucket tooth performance corresponding database; designing customized appearances such as plain-end exhaust grooves, cylindrical cones and thickened working surfaces according to working conditions such as soil sandy soil, low-temperature rock-containing soil and southern humid rocks, and matching customized raw materials containing nickel / chromium / molybdenum according to a ratio; through lost wax casting, targeted heat treatment and surface treatment forming, production is completed through detection, identification and packaging. The bucket tooth prepared through the method can precisely adapt to different working conditions and is excellent in mechanical property and environment resistance, the working efficiency is improved by 20.6%-34.0% compared with that of a conventional bucket tooth, the service life is prolonged by 78.6% at most, the use cost of customers can be reduced, and differential operation requirements are met.

The utility model provides sticky slurry sand pouring auxiliary equipment for a cage type blade wax mold, and belongs to the technical field of lost wax casting. Comprising a mounting support, a vibration sieve tray is movably arranged at the top of the mounting support, a first driving assembly used for driving the vibration sieve tray to reciprocate is arranged on the mounting support, and an operation space for an operator to hold a wax mold to rotate and move is formed in the position, under the vibration sieve tray, in the mounting support; a discharging hopper used for containing sand grains is arranged at the position, located above the vibration sieve tray, of the mounting support, and a first discharging valve used for limiting falling of the sand grains is arranged at the bottom of the discharging hopper. An operator can uniformly shake off the sand grains into the operation space by loading the sand grains into the discharging hopper in advance and sequentially opening the first discharging valve and the vibration sieve tray, at the moment, the operator can operate a wax mold to stretch into the operation space, the sand grains are uniformly adhered to slurry on the surface of the wax mold, and the sand pouring device has the effects of saving manpower and improving the sand pouring efficiency.

The utility model discloses an evaporator rear cover investment casting structure. The evaporator rear cover investment casting structure comprises a tree assembling die head and two evaporator rear cover investment casting parts communicated with the tree assembling die head. The tree assembling die head comprises a pouring cup, a first pouring gate arranged in the X-axis direction, a plurality of wax discharging pipelines, a plurality of first inner pouring gates, an auxiliary pouring gate communicated with the first pouring gate and a plurality of second inner pouring gates. The sprue cup is communicated with the top of the runner I; one end of each dewaxing pipeline is communicated with the pouring cup, and the other end of each dewaxing pipeline is communicated with the pouring gate I; the runner I is communicated with the two evaporator rear cover investment casting parts through a plurality of flow gates I; the auxiliary pouring gate is communicated with the two evaporator rear cover investment casting parts through a plurality of inner sprues II; the auxiliary pouring gate comprises a pouring gate II arranged in the Z-axis direction and a pouring gate III arranged in the Y-axis direction; and the two ends of the pouring gate II are correspondingly communicated with the pouring gate I and the pouring gate III.

The invention discloses a plateau lost wax method gypsum precision casting process, relates to the technical field of precision casting, and aims to solve the problems of non-uniform slurry dispersion, shell cracking, high casting defect rate and the like existing in a traditional casting method in a plateau low-pressure environment. Step-by-step mixing and vacuum defoaming treatment of an organic additive and calcium sulfate hemihydrate are combined, so that the stability of the slurry is improved; a stepped temperature control drying process is adopted, temperature and humidity are regulated and controlled in stages, and directional growth of crystals in the shell is promoted; roasting and vacuum pouring technologies are combined, so that gas inclusion in molten metal is reduced; and parameters in the whole process of dispersing, defoaming, drying and pouring are monitored in real time and dynamically adjusted through an intelligent control system. Through collaborative design of a material formula, a dispersion process, a drying system and intelligent control, high-precision castings can be stably produced in the plateau environment, and the high-precision casting device is suitable for the fields such as aerospace and medical instruments with strict requirements for casting quality.

The invention relates to the technical field of lost wax casting, and particularly discloses a wax-water online separation steam dewaxing device which comprises a box body and a steam generator, a dewaxing kettle is arranged in the box body, a steam pipe set communicated with the dewaxing kettle is arranged on the steam generator, a storage filter hole disc is arranged in the dewaxing kettle in a drawing mode, and the storage filter hole disc is communicated with the dewaxing kettle. A material pumping pipe is connected to the bottom of the dewaxing kettle, a wax-water separation mechanism connected with the material pumping pipe is arranged in the box body, and the wax-water separation mechanism comprises a condensation barrel rotationally arranged beside the dewaxing kettle and a second motor for driving the condensation barrel to rotate; compared with an existing mode that an electromagnetic induction coil is adopted to heat a wax-water mixture to achieve wax-water separation, the wax-water separation mechanism disclosed by the invention does not need to adopt electric energy to achieve heating evaporation of water, high-temperature heat in the wax-water mixture can also be effectively recycled, the energy consumption of the whole device is greatly reduced, and the production cost is reduced. The positive significance of energy conservation and emission reduction is realized.

The invention discloses a lost wax casting workpiece cooling and temperature reduction device, and relates to the technical field of casting cooling. In order to solve the problem of low cooling efficiency of the existing cooling, a hydraulic mechanism is used to move up and drive a mounting plate to move up and finally carry a support plate, and then drive the support plate to move down so that the support plate enters a support step for cooling. After cooling for a certain period of time, the hydraulic mechanism drives the mounting plate to move up and down again so that a push column is inserted from a guide hole so that the push column touches the workpiece to make the workpiece move, thereby reducing the contact surface between the workpiece and the workpiece or between the workpiece and the support plate, increasing the contact surface between the cooling medium and the workpiece, improving the cooling uniformity, and improving the working efficiency. Moreover, the piston plate will push the cooling medium in the cooling bin to have a tendency to flow up and down, so that the cooling medium has a partial reverse flow, so that the part of the workpiece facing away from the flow direction of the cooling medium is easy to contact with the colder cooling medium, so as to improve the cooling effect of the workpiece.

The invention relates to a wax pattern cluster around which a mould (1) for manufacturing a plurality of bladed turbine engine elements by lost wax casting is intended to be formed, the mould having a longitudinal axis (X), and comprises: a replica mold for the casting cup (2), a replica mold for the center injection port (3), a plurality of replica molds for the mold element (4), and a plurality of replica molds for the raw material supply duct (5) for the mold element (4). According to the invention, each replica mold of the raw material supply conduit (5) is connected to the replica mold of the mold element (4) via the replica mold of the fluid communication element (6a, 6b, 6c).

The utility model relates to a wax mould structure for gravity casting of a turbocharger cover plate by a lost wax method, a group tree pouring gate and a plurality of groups of mutually parallel cavities are arranged between an upper mould plate and a lower mould plate, and each cavity comprises an inner pouring gate, a product pouring cavity connected with the inner pouring gate and a sliding block cavity; the flow gate is connected with the assembly pouring gate, a V-shaped groove structure is arranged between the flow gate and the product pouring cavity, an ejector plate ejector pin is arranged below the assembly pouring gate and the flow gate, and a sliding block is arranged in the sliding block cavity. In the implementation process, injected wax enters the tree assembling pouring gate and enters the product pouring cavity through the inner pouring gate, after cooling, the upper mold plate and the lower mold plate are opened, the sliding block is also parted, the tree assembling pouring gate and the cover plate wax piece are connected together and ejected out at the same time, and the process that the cover plate wax piece and the tree assembling pouring gate need to be glued one by one is omitted. The inner pouring gate is designed to be of the V-shaped groove structure, after a product is poured, a formed cover plate part can fall off by knocking the V-shaped groove structure, the working procedure of cutting machining is omitted, and the precision of the product is improved.

The invention relates to the technical field of lost wax casting, and particularly discloses a drum-type automatic sand spraying device for lost wax casting shell making. A sand homogenizing and filtering mechanism fixedly connected with a box body is arranged in a sand spraying drum, and an arc guide plate fixedly connected with the box body is arranged at the lower inclined end of the sand homogenizing and filtering mechanism; a sand grinding roller located in the sand spraying rotary drum is arranged at the lower end of the arc guide plate, and one end of the sand grinding roller is connected with a sand grinding motor. The wax mold conveying device further comprises a wax mold closed-loop conveying mechanism, the wax mold closed-loop conveying mechanism comprises a frame type top plate and stand columns, a plurality of transmission wheels are rotationally arranged on the frame type top plate, closed-loop conveying pieces are arranged among the transmission wheels, and wax mold fixing pieces are connected to the closed-loop conveying pieces at equal intervals. According to the drum-type automatic sand spraying device disclosed by the invention, assembly line type efficient sand spraying operation of a wax mold is realized, the sand spraying operation efficiency is higher, meanwhile, sand can be sprayed on all wax mold dead angles with complex structures, and the product quality of a finally prepared wax mold shell is effectively ensured.