Sand box turnover cleaning device for lost foam casting

Abstract

The application relates to a sand box cleaning technical field, in particular to a sand box turnover cleaning device for lost foam casting, which comprises a workbench, a turnover part, a clamping part, a cleaning transmission part and a cleaning part. The turnover part is fixed on the front side of the workbench, the clamping part is connected to the middle part of the turnover part, the cleaning transmission part is fixed on the rear side of the workbench upper surface, and the cleaning part is fixed on the upper part of the cleaning transmission part. The sand box is cleaned by being turned over, and the sand box is positioned by the installation clamp. When the negative pressure extraction block of the sand box is cleaned, the cleaning work piece can be attached to the side surface of the negative pressure extraction block, then the conical air hole of the air jet block blows air to the negative pressure hole of the negative pressure extraction block through the compressed air transmitted by the air pump, so that the sand in the negative pressure hole of the negative pressure extraction block is blown off, and the cleaning scraper and the rolling wheel can clean the sundries on the surface of the negative pressure extraction block and the sundries stuck in the negative pressure hole under the action of the pressure on the telescopic rod.

Description

TECHNICAL FIELD

[0001] The application relates to a sand box cleaning technology field, in particular to a sand box turnover cleaning device for lost foam casting. BACKGROUND

[0002] The lost foam casting is a new type of casting method that wax or foam model similar in size and shape to the casting is bonded and combined into a model cluster, refractory paint is brushed and dried, and then buried in dry quartz sand for vibration molding, poured under negative pressure, the model is gasified, the liquid metal occupies the model position, and the casting is formed after solidification and cooling.

[0003] The sand box for lost foam casting plays a very important role in the lost foam casting process. Figure 10 As shown in the drawings, the sand box is combined and shaped by steel plates, channel steels, stainless steel nets and grid bars, negative pressure extraction blocks are arranged at the top corner positions in the sand box, the negative pressure extraction blocks are uniformly provided with negative pressure holes facing the side surface of the sand box, and cross frame strips for increasing the strength of the sand box are arranged on the outer side of the sand box. The sand box can make the casting achieve the most reasonable negative pressure field when the casting is vacuumized in the sand box, so that the full-box casting formed by pouring is good and has no defects. After the casting is completed, the sand in the sand box needs to be cleaned to prevent the residual sand in the sand box from affecting the subsequent casting. The existing sand box cleaning device has the problem of inconvenient cleaning.

[0004] In view of the above problems, the utility model patent with publication number CN209157070U discloses a lost foam casting special sand box convenient to clean, and the suction port of the dust collection fan is connected with the cleaning port through a hose, so that the residual sand is blown off under the action of the dust collection fan.

[0005] Although the above technical scheme can quickly clean the sand box, the position of the negative pressure extraction block of the sand box cannot be cleaned, and the residual sand can be blocked in the negative pressure hole of the negative pressure extraction block. The residual sand cannot be completely cleaned by the fan extraction method. In addition, the residual sundries on the side wall of the negative pressure extraction block and the inner side wall of the sand cannot be scraped off. SUMMARY

[0006] In view of the above problems, the purpose of the present application is to provide a sand box turnover cleaning device for lost foam casting, which comprises a workbench, a turnover part, a clamping part, a cleaning transmission part, and a cleaning part. The workbench is placed on the ground, the turnover part is fixed on the front side of the workbench, the clamping part is connected to the middle part of the turnover part, the cleaning transmission part is fixed on the rear side of the workbench, and the cleaning part is fixed on the upper part of the cleaning transmission part.

[0007] The turnover part is used for controlling the clamping part to turn over. The clamping part comprises a loading plate connected to the turnover part, the loading plate is in U-shaped structure, and opposite sides of two vertical edges of the loading plate are uniformly provided with one mounting clamp. The mounting clamp is connected to one end of a tightening bolt through rotating fit, the other end of the tightening bolt penetrates through the loading plate, and the tightening bolt is in threaded fit with the loading plate. Limiting pins are symmetrically arranged on both sides of the tightening bolt, the limiting pins are installed on the side surface of the mounting clamp, and the limiting pins penetrate through the loading plate. Opposite side surfaces of the two mounting clamps are provided with cross-shaped grooves.

[0008] The cleaning transmission part comprises a rotating motor installed on the top of the rear side of the workbench through the motor base, the output shaft of the rotating motor is connected to the lower end of the electric sliding block, and the electric sliding block is provided with an electric push rod on the top.

[0009] The cleaning part comprises a main arm installed on the top of the electric push rod, the main arm is provided with elastic telescopic rods at two ends, the elastic telescopic rods are provided with partition blocks at one end away from each other, and the partition blocks are connected with cleaning working members through hinging.

[0010] The cleaning working member comprises an air jet block hinged to the side surface of the partition block, the air jet block is in hollow structure, the side surface of the air jet block away from the partition block is an inclined surface, the inclined surface of the air jet block is uniformly provided with air jet holes, the air jet block is connected with a gas pump through an elastic air conveying pipe, and the gas pump is installed on the front side surface of the main arm.

[0011] Preferably, a support plate is welded on the upper end surface of the air jet block, the support plate is connected with a pressing telescopic rod corresponding to the side surface of the inclined surface of the air jet block, the pressing telescopic rod is fixedly connected with a cleaning scraper at one end away from the support plate, and the cleaning scraper is connected with a rolling wheel at the middle upper end.

[0012] Preferably, the side of the cleaning scraper close to the inclined surface of the air jet block is in pointed structure, and the outer side surface of the rolling wheel is uniformly provided with rubber protrusions.

[0013] Preferably, a longitudinal connecting plate is fixed on the front side surface of the main arm, and a cleaning arm is installed on the front end of the longitudinal connecting plate, the cleaning arm comprises a cleaning column fixedly connected through penetration on the longitudinal connecting plate, the cleaning column is in elastic telescopic structure at two ends, and the cleaning column is connected with cleaning plates at two ends.

[0014] Preferably, the cleaning plate is in cross-shaped structure, the side surface of the cleaning plate away from the cleaning column is provided with pointed protrusion structure, and the front and rear ends of the cleaning plate are in arc-shaped structure.

[0015] Preferably, the cross section of the air jet hole on the air jet block is in conical structure, and the outer side of the inclined surface of the air jet block is provided with a sealing gasket.

[0016] Preferably, the cross-shaped groove on the mounting clip divides the top corner thereof into four cuboid-shaped protruding blocks, the protruding blocks are hollow structures, and the side surfaces of the protruding blocks corresponding to the cross-shaped groove are provided with displacement grooves, each protruding block is connected with an extrusion bolt at the top corner of the mounting clip through threaded cooperation, the end of the extrusion bolt is connected with a pushing block through rotary cooperation, the pushing block slides in the hollow structure of the protruding block, the sliding direction of the pushing block moves from the top corner of the protruding block to the opposite top corner, the pushing block is an L-shaped structure, and the two ends thereof penetrate the displacement grooves.

[0017] Preferably, the turnover part comprises support columns distributed at both ends of the loading plate, the lower ends of the support columns are installed on the workbench through longitudinal electric sliding blocks, one of the support columns is provided with a turnover execution motor through a motor cover, and the other support column is provided with a matched rotary rod rotatably installed thereon, and the output end of the turnover execution motor is installed at one end of the loading plate.

[0018] The present application has the following advantages: 1. The sand box is cleaned by turning over, the mounting clip with a cross-shaped groove is used to position the sand box according to its structure, and the pushing block penetrating the displacement groove is used to further fix the sand box, so that the sand box can be stably turned over, and the position of the sand box during turning over and cleaning does not change, thereby increasing the subsequent cleaning effect of the sand box.

[0019] 2. The elastic telescopic rod is used to clean the residual sand on the inner side wall of the sand box of different sizes, and the rotary motor is used to turn over the cleaning workpiece, so that the cleaning workpiece can clean the negative pressure extraction block at the top corner of the sand box, and the cleaning workpiece can automatically adhere to the side surface of the negative pressure extraction block under the action of the hinge, thereby further increasing the cleaning effect of the negative pressure extraction block.

[0020] 3. When the negative pressure extraction block of the sand box is cleaned, the cleaning workpiece can adhere to the side surface of the negative pressure extraction block, the tapered air hole of the air jet block blows air to the negative pressure hole of the negative pressure extraction block through the compressed air transmitted by the air pump, thereby blowing off the sand blocked in the negative pressure hole of the negative pressure extraction block, and the cleaning scraper and the rolling wheel can respectively clean the sundries on the surface of the negative pressure extraction block and the sundries stuck in the negative pressure hole under the action of pressing the telescopic rod.

[0021] 4. The telescopic cleaning plate is used to clean the inner side wall of the sand box, thereby removing the residual sand on the inner side wall of the sand box, and the cleaning effect is better; and the arc-shaped edge of the cleaning plate is used to prevent the cleaning plate from scratching the inner wall when rotating. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further described below in connection with the drawings and embodiments.

[0023] Figure 1 is a perspective view of the clamping part of the application.

[0024] Figure 2 is a sectional view of the clamping part of the application.

[0025] Figure 3 is a sectional view of the clamping part of the application.

[0026] Figure 4 is a perspective view of the clamping part of the application.

[0027] Figure 5 is a sectional view of the clamping part of the application.

[0028] Figure 6 is a perspective view of the clamping part of the application.

[0029] Figure 7 is a sectional view of the clamping part of the application.

[0030] Figure 8 is a perspective view of the clamping part of the application.

[0031] Figure 9 is a sectional view of the clamping part of the application.

[0032] Figure 10 is a perspective view of the clamping part of the application.

[0033] Figure: 1, workbench; 2, overturning part; 21, supporting column; 22, longitudinal electric sliding block; 23, overturning execution motor; 24, matched rotating rod; 3, clamping part; 31, loading plate; 32, limiting pin; 33, tightening bolt; 34, mounting clamp; 341, protruding block; 342, allowing slot; 343, extruding bolt; 344, pushing block; 4, cleaning transmission part; 41, rotating motor; 42, electric sliding block; 43, electric push rod; 5, cleaning part; 51, main arm; 52, elastic telescopic rod; 53, partition block; 54, longitudinal connecting plate; 55, cleaning arm; 551, cleaning column; 552, cleaning plate; 56, cleaning working part; 561, air jet block; 562, air jet hole; 563, air pump; 564, elastic air conveying pipe; 565, supporting plate; 566, pressure telescopic rod; 567, cleaning scraper; 568, rolling wheel; 61, negative pressure extraction block; 62, cross frame strip. Embodiment

[0034] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0035] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Figure 1 A sand box turnover cleaning device for lost foam casting comprises a workbench 1, a turnover part 2, a clamping part 3, a cleaning transmission part 4, and a cleaning part 5. The workbench 1 is placed on the ground. The turnover part 2 is fixed on the front side of the upper surface of the workbench 1. The clamping part 3 is connected to the middle of the turnover part 2. The cleaning transmission part 4 is fixed on the rear side of the upper surface of the workbench 1. The cleaning part 5 is fixed on the upper part of the cleaning transmission part 4. The sand box for lost foam casting can be cleaned completely by turnover. Different types of sand boxes can be stably locked and cleaned. Specifically, the sand box to be cleaned is placed on the clamping part 3. The cross frame structure on the outer side of the sand box is effectively fixed. Then, the sand box is turned over by the turnover part 2 and the opening faces downward. The turned-over sand box is moved above the cleaning part 5. The cleaning part 5 can clean the inside of the sand box completely by the movement and extension of the cleaning transmission part 4.

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Figures 1 to 3The clamping part 3 comprises a loading plate 31 connected to the turnover part 2, the loading plate 31 is in U-shaped structure, the opposite sides of the two vertical edges of the loading plate 31 are provided with an installation clamp 34, the installation clamp 34 is connected to one end of the tightening bolt 33 through the rotary fitting mode close to the side surface of the vertical edge of the loading plate 31, the other end of the tightening bolt 33 penetrates the loading plate 31, and the tightening bolt 33 is in threaded fitting with the loading plate 31, the limiting pin 32 is symmetrically arranged on the side surface of the installation clamp 34, and the limiting pin 32 penetrates the loading plate 31, and the opposite sides of the two installation clamps 34 are provided with cross-shaped grooves; the cross-shaped groove on the installation clamp 34 divides the top corner thereof into four cube-shaped convex blocks 341, the convex blocks 341 are in hollow structure, and the side surface of the convex block 341 corresponding to the cross-shaped groove is provided with a gap 342, and the top corner of each convex block 341 corresponding to the installation clamp 34 is connected with an extrusion bolt 343 through the threaded fitting mode, the end of the extrusion bolt 343 is connected with a pushing block 344 through the rotary fitting mode, the pushing block 344 slides in the hollow structure of the convex block 341, the sliding direction of the pushing block 344 moves from the top corner of the convex block 341 corresponding to the installation clamp 34 to the opposite top corner, the pushing block 344 is in L-shaped structure, and the two ends thereof penetrate the gap 342 respectively; the clamping part 3 is used for locking the sand box according to the structure thereof, ensuring that the sand box can be smoothly turned over and subsequently cleaned, so that the inside of the sand box is comprehensively cleaned, specifically, first, the sand box to be cleaned is placed in the U-shaped structure of the loading plate 31, and the cross frame 62 of the sand box is ensured to face the installation clamp 34, then the cross-shaped groove on the installation clamp 34 is clamped at the cross frame 62 of the sand box by rotating the tightening bolt 33, at the same time, the convex block 341 on the installation clamp 34 abuts against the side surface of the sand box, thereby completing the preliminary fixing of the sand box, then the extrusion bolt 343 arranged at the four corners of the installation clamp 34 is rotated, and the pushing block 344 can be clamped at the side surface of the cross frame 62 of the sand box, so that the installation clamp 34 locks the sand box in all directions, preventing the sand box from shaking after being turned over; at the same time, through the arrangement of the pushing block 344, the sand box of different models can be locked, further increasing the applicability of the present application.

[0037] Referring to Figure 1The overturning part 2 includes support columns 21 distributed at both ends of the loading plate 31, the lower ends of the support columns 21 are both installed on the workbench 1 through longitudinal electric slides 22, one of the support columns 21 is installed with an overturning execution motor 23 through a motor cover, the other support column 21 is installed with a matched rotating rod 24 through rotation, the output end of the overturning execution motor 23 and the matched rotating rod 24 are respectively installed at both ends of the loading plate 31. The overturning part 2 is used for controlling the overturning of the clamping part 3 and moving the overturned sand box to a suitable cleaning position, so as to realize the automatic cleaning of the sand box. Specifically, after the sand box is locked, the overturning execution motor 23 drives the clamping part 3 to complete the overturning of the locked sand box, and then the longitudinal electric slide 22 moves backward to accurately move the sand box above the cleaning part 5, so that the cleaning part 5 can clean it.

[0038] Referring to Figure 1 The cleaning transmission part 4 includes a rotating motor 41 installed on the top of the rear side of the workbench 1 through a motor cover, the output shaft of the rotating motor 41 is connected with the lower end of an electric slide 42, and the top of the electric slide 42 is installed with an electric push rod 43. The cleaning transmission part 4 is used for adjusting the movement and rotation of the cleaning part 5, so as to clean the inner wall of the sand box and the negative pressure extraction block 61. Specifically, when the sand box is above the cleaning part 5, the electric push rod 43 is controlled to make the top of the cleaning part 5 contact the bottom of the sand box, and then the electric slide 42 moves forward and backward to clean the left and right inner walls of the sand box. When the cleaning part 5 moves to the position of the two negative pressure extraction blocks 61 at the rear side of the sand box, the electric push rod 43 is controlled to extend and retract, so that the cleaning part 5 can clean the two negative pressure extraction blocks 61 at the rear side. After that, the cleaning part 5 is moved to the middle of the sand box, the rotating motor 41 is controlled to rotate clockwise by ninety degrees, and the above cleaning steps are repeated to clean the two negative pressure extraction blocks 61 at the right side of the sand box. The above steps are repeated again, so that the sand box can be cleaned respectively.

[0039] Referring to Figure 4 and Figure 5The cleaning part 5 comprises a main arm 51 installed on the top of the electric push rod 43, and elastic telescopic rods 52 are arranged at both ends of the main arm 51, and a partition block 53 is arranged at the end of each of the two elastic telescopic rods 52 away from each other, and a cleaning working piece 56 is connected to the end of each of the two partition blocks 53 away from each other in a hinged manner. The cleaning part 5 can clean the negative pressure extraction block 61 of the sand box in an all-round way. Specifically, when the sand box is moved to above the cleaning part 5 by the clamping part 3, the main arm 51 is controlled to move upwards, at this time, the elastic telescopic rods 52 can automatically expand or contract so that the cleaning working piece 56 is attached to the left and right side walls of the sand box, and then the main arm 51 is controlled to move backwards, and the cleaning working piece 56 can be attached to the side of the negative pressure extraction block 61 under the action of the hinged end thereof.

[0040] Referring to Figure 6 and Figure 7 The cleaning working piece 56 comprises a gas jetting block 561 hinged to the side of the partition block 53, the gas jetting block 561 is of a hollow structure, the side of the gas jetting block 561 away from the partition block 53 is an inclined surface, and the inclined surface of the gas jetting block 561 is uniformly provided with gas jetting holes 562, the cross section of the gas jetting holes 562 is of a conical structure, and a sealing gasket is arranged outside the inclined surface of the gas jetting block 561. The gas jetting block 561 is connected to a gas pump 563 through an elastic gas conveying pipe 564, and the gas pump 563 is installed on the front side of the main arm 51. A supporting plate 565 is welded to the upper end surface of the gas jetting block 561, a pressing telescopic rod 566 is connected to the side of the inclined surface of the gas jetting block 561 corresponding to the supporting plate 565, a cleaning scraper 567 is fixedly connected to the end of the pressing telescopic rod 566 away from the supporting plate 565, and a rolling wheel 568 is connected to the upper end of the middle part of the cleaning scraper 567. The cleaning working piece 56 is used for fine cleaning of the surface of the negative pressure extraction block 61, and is the most important part for completing the all-round cleaning of the negative pressure extraction block 61. The cleaning working piece 56 removes the sundries on the side of the negative pressure extraction block 61 and in the negative pressure hole in a way of wind blowing, surface scraping and rolling wheel extruding. Specifically, when the cleaning working piece 56 is attached to the side of the negative pressure extraction block 61, the gas pump 563 is started to make the airflow transmitted to the gas jetting block 561 through the elastic gas conveying pipe 564, and the airflow is compressed through the conical gas holes of the gas jetting block 561, so that the negative pressure extraction block 61 can be cleaned in a way of wind blowing. With the expansion and contraction movement of the electric push rod 43, the cleaning scraper 567 removes the sundries on the side of the negative pressure extraction block 61 in a way of surface scraping, and the rolling wheel 568 removes the sundries stuck in the negative pressure hole of the negative pressure extraction block 61 in a way of rolling wheel extruding. In addition, the pressing telescopic rod 566 can generate a certain pushing force on the cleaning scraper 567 and the rolling wheel 568, so that the cleaning scraper 567 and the rolling wheel 568 can clean the negative pressure extraction block 61 with a certain force.

[0041] The cleaning scraper 567 is pointed near the side of the jet block 561 inclined surface structure, the outer side of the rolling wheel 568 is uniformly provided with rubber convex, the pointed structure of the cleaning scraper 567 can increase the scraping effect of the sundries, the rubber convex of the rolling wheel 568 can extrude and push away the sundries firmly stuck in the negative pressure hole of the negative pressure extraction block 61.

[0042] Referring to Figure 4 、 Figure 8 and Figure 9 , the front side of the main arm 51 is fixed with a longitudinal connecting plate 54, the front end of the longitudinal connecting plate 54 is installed with a cleaning arm 55, the cleaning arm 55 includes a cleaning column 551 fixedly connected through the longitudinal connecting plate 54, both ends of the cleaning column 551 are elastic expansion structure, and both ends of the cleaning column 551 are connected with a cleaning plate 552, the cleaning plate 552 is cross-shaped structure, and the side away from the cleaning column 551 of the cleaning plate 552 is provided with pointed convex structure, and both ends of the cleaning plate 552 are arc-shaped structure. The cleaning arm 55 is used for cleaning the inner side wall of the sand box, which can effectively scrape off the residual sundries and sand of the side wall of the sand box, specifically, with the expansion movement of the electric push rod 43 and the movement of the electric sliding block 42, the cleaning plate 552 will scrape off the sundries and residual sand of the inner side wall of the sand box on the path, the cross-shaped structure of the cleaning plate 552 and the pointed convex structure can increase the cleaning effect of the cleaning plate 552 on the sand box, and the arc-shaped structure of the cleaning plate 552 can not hinder the rotation of the main arm 51 when the rotating motor 41 drives the rotation of the main arm 51.

[0043] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A sand box turnover cleaning device for expendable pattern casting, comprising a worktable, a turnover part, a clamping part, a cleaning transmission part, and a cleaning part, characterized in that, The workbench is placed on the ground, the turnover part is fixed on the front side of the workbench top, the clamping part is connected to the middle part of the turnover part, the cleaning transmission part is fixed on the rear side of the workbench top, and the cleaning part is fixed on the upper part of the cleaning transmission part. The turnover part is used for controlling the clamping part to turn over; the clamping part comprises a loading plate connected to the turnover part, the loading plate is of a U-shaped structure, opposite sides of two vertical edges of the loading plate are uniformly provided with a mounting clamp, a side of the mounting clamp close to the vertical edge of the loading plate is connected to one end of a tightening bolt in a rotating fit mode, the other end of the tightening bolt penetrates through the loading plate, the tightening bolt is in a threaded fit with the loading plate, limiting pins are symmetrically arranged on both sides of the tightening bolt, the limiting pins are installed on the side of the mounting clamp and penetrate through the loading plate, and opposite sides of the two mounting clamps are provided with cross-shaped grooves. The cleaning transmission part comprises a rotating motor installed on the top of the rear side of the workbench through a motor base, an output shaft of the rotating motor is connected to the lower end of the electric sliding block, and the electric sliding block is provided with an electric push rod on the top. The cleaning part comprises a main arm installed on the top of the electric push rod, the main arm is provided with elastic extension rods at both ends, the elastic extension rods are provided with partition blocks at the ends away from each other, and the partition blocks are connected to cleaning working pieces in a hinged mode. The cleaning working pieces comprise air jet blocks hinged to the side of the partition block, the air jet blocks are of a hollow structure, the side of the air jet block away from the partition block is an inclined surface, the inclined surface of the air jet block is uniformly provided with air jet holes, the air jet block is connected to an air pump through an elastic air pipe, and the air pump is installed on the front side of the main arm. The cleaning working pieces adopt the mode of wind blowing, surface scraping and roller extruding to remove sundries in the side of the negative pressure suction block and the negative pressure hole. The cross-shaped grooves on the mounting clamp divide the top corners thereof into four convex blocks of a cubic structure, the convex blocks are of a hollow structure, and the side of the convex block corresponding to the cross-shaped groove is provided with a clearance groove, each convex block is connected to an extrusion bolt at the top corner of the mounting clamp in a threaded fit mode, the end of the extrusion bolt is connected to a pushing block in a rotating fit mode, and the different types of cross frame strips on the sand box can be locked through the pushing block. A supporting plate is welded to the upper end surface of the air jet block, a pressing extension rod is connected to the side of the supporting plate corresponding to the inclined surface of the air jet block, a cleaning scraper is fixedly connected to the end of the pressing extension rod away from the supporting plate, and a rolling wheel is connected to the middle upper end of the cleaning scraper. The outer side of the rolling wheel is uniformly provided with rubber protrusions.

2. The sand box turnover cleaning device for expendable pattern casting according to claim 1, wherein The side of the cleaning scraper close to the inclined surface of the air jet block is a pointed structure.

3. The sand box turnover cleaning device for expendable pattern casting according to claim 1, wherein A longitudinal connecting plate is fixed on the front side of the main arm, a cleaning arm is installed on the front end of the longitudinal connecting plate, the cleaning arm comprises a cleaning column fixedly connected to the longitudinal connecting plate, both ends of the cleaning column are of an elastic extension structure, and the cleaning column is connected to a cleaning plate at both ends.

4. The sand box turnover cleaning device for expendable pattern casting according to claim 3, wherein The cleaning plate is of a cross-shaped structure, the side of the cleaning plate away from the cleaning column is provided with a pointed protrusion structure, and both ends of the cleaning plate are of an arc structure.

5. The sand box turnover cleaning device for expendable pattern casting according to claim 1, wherein The cross section of the air jet hole of the air jet block is of a conical structure, and the outer side of the inclined surface of the air jet block is provided with a sealing gasket.

6. The sand box turnover cleaning device for expendable pattern casting according to claim 1, wherein The push block slides in the hollow structure of the convex block, the sliding direction of the push block moves from the top corner position of the convex block to the opposite top corner position, the push block is an L-shaped structure, and two ends respectively penetrate the accommodation slot.

7. The sand box turnover cleaning device for expendable pattern casting according to claim 1, wherein The overturning part includes support columns distributed at both ends of the loading plate, the lower ends of the support columns are installed on the workbench through longitudinal electric sliding blocks, one of the support columns is installed with an overturning execution motor through a motor cover, the other support column is rotatably installed with a matched rotating rod, and the output end of the overturning execution motor and the matched rotating rod are installed at both ends of the loading plate.

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