A shell making equipment for investment casting and a shell making process thereof

Abstract

The application discloses a shell manufacturing equipment for investment casting and a shell manufacturing process thereof, and relates to the technical field of investment casting equipment, which comprises a box body, a supporting assembly, a power assembly and a discharging assembly. Through-slots are arranged on the two sides of the box body, and conveying guide rails are arranged between the two through-slots in a penetrating mode. The bottom of the conveying guide rails is provided with the supporting assembly, the supporting assembly is provided with wax mold workpieces, the top of the supporting frame is fixedly provided with a first mounting disc, the supporting frame is uniformly mounted on the side surface of the first mounting disc, the power assembly is used for driving the rotation of the supporting assembly and adjusting the supporting angle of the supporting assembly, and the discharging assembly is used for uniformly providing sand in the box body. Through the cooperation of the supporting assembly and the telescopic and rotatable power assembly, the wax mold workpieces can be supported and rotated in the horizontal direction and supported and rotated in the upward tilting direction, and the wax mold workpieces can be uniformly sand-coated under the uniform sand discharging of the discharging assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of investment casting equipment, in particular to an investment casting shell making equipment and a shell making process thereof. BACKGROUND

[0002] Investment casting is usually to make a wax pattern into a mold and form a mold group, then coat several layers of refractory material on the surface of the mold group, after hardening, drying and curing, heat the mold group to melt out the mold material to form a hollow shell, pour the molten metal after high temperature sintering, and clean to obtain the casting. Investment casting mainly includes six processes: wax pattern forming, tree assembly, shell making, dewaxing and baking, melting and pouring, sand cleaning, and cutting to get the finished product.

[0003] The shell making process is crucial in investment casting, and the sanding process is crucial for shell making. The sanding process is usually performed manually by uniformly sprinkling sand on the wax pattern. The automation degree is low, and the operation requires high proficiency of the operator. Otherwise, it will greatly affect the uniformity of sanding. The ordinary sanding machine can only sand the wax pattern from one direction, and it is difficult to uniformly sand each part of the workpiece with a complex surface. SUMMARY

[0004] The purpose of the present application is to provide an investment casting shell making equipment and a shell making process thereof. By cooperating the support assembly with the telescopic and rotating power assembly, the wax pattern workpiece can be supported and rotated in the horizontal direction and supported and rotated in the upward inclined direction. Under the uniform sanding of the discharging assembly, the wax pattern workpiece can be uniformly sanding, thereby solving the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] An investment casting shell making equipment, comprising a box body, a support assembly, a power assembly and a discharging assembly, both sides of the box body are provided with through grooves, a conveying guide rail is provided between the through grooves on both sides, the bottom of the conveying guide rail is provided with the support assembly, the support assembly is provided with a wax pattern workpiece, a support frame is installed on the inner side wall of the box body, a first mounting disc is fixedly installed on the top of the support frame, the support frame is uniformly installed on the side of the first mounting disc, the power assembly is rotatably installed on the first mounting disc, the power assembly is used to drive the rotation of the support assembly and adjust the support angle of the support assembly, the discharging assembly is installed on the top of the box body, and the discharging assembly is used to provide uniform sand in the box body.

[0007] Further, the support assembly comprises a connecting rod, a top plate, a limiting disc and a mounting rod, the connecting rod is connected with the chain in the conveying guide rail, the bottom of the connecting rod is fixedly installed with the top plate, the bottom of the top plate is rotatably installed with the limiting disc, the bottom of the top plate is uniformly installed with a plurality of sets of clamping plates in the circumferential direction, the clamping plates are rotatably installed with the eye, the sleeve is rotatably installed on the mounting rod, the end of the mounting rod away from the limiting disc is fixedly installed with the supporting disc, the supporting disc is installed with the wax mold workpiece, the end of the mounting rod close to the limiting disc is fixedly installed with the driven gear, the end of the driven gear is fixedly installed with the bevel gear, the bottom of the limiting disc is fixedly installed with the first annular gear plate, the gear surface of the limiting disc faces the bottom direction of the box, the driven gear is in transmission cooperation with the first annular gear plate, and the bottom of the limiting disc is provided with an annular gear groove.

[0008] Further, the power assembly comprises a rotating disc, a first motor, a conical cover, a top rod and a guide sleeve, the rotating disc is in transmission cooperation with the first installation disc, the bottom of the first installation disc is fixedly installed with the first motor, the output end of the first motor is connected with the bottom of the rotating disc, the bottom of the rotating disc is fixedly installed with the hydraulic telescopic rod, the top of the hydraulic telescopic rod is fixedly installed with the push plate, the two sides of the top of the push plate and the bottom of the rotating disc are connected with the guide rod, the top of the push plate is fixedly installed with the top rod, the outside of the top of the first installation disc is fixedly installed with the annular cover, the top of the annular cover is fixedly installed with the conical cover, the top of the conical cover is installed with the guide sleeve, the top rod is in sliding cooperation with the guide sleeve, the top of the guide sleeve is installed with the second installation disc, the top of the top rod is fixedly installed with the driving gear, the driving gear is in transmission cooperation with the annular gear groove at the bottom of the limiting disc, the connection position between the top rod and the push plate is embeddedly installed with the pressure signal acquisition module, the pressure signal acquisition module is used for acquiring the pressure signal between the top rod and the push plate and sending the signal to the controller, and the controller is installed on the annular cover.

[0009] Further, a plurality of sets of electric telescopic rods are installed on the second installation disc in the circumferential direction, the top of the electric telescopic rod is rotatably installed with the arc-shaped supporting plate, the arc-shaped supporting plate is supported on the bottom of the mounting rod in the initial state, the contact position of the mounting rod and the arc-shaped supporting plate is located between the supporting disc and the mounting rod, a plurality of sets of triangular plates are connected between the bottom of the second installation disc and the guide sleeve, the second installation disc is provided with a second annular gear plate, the second annular gear plate is in transmission cooperation with the second installation disc, a circular ring is installed on the inner side of the second annular gear plate, a guide block is installed on the inner side of the circular ring, a guide groove is formed on the top rod along the extension direction of the top rod, the guide block is in sliding cooperation with the guide groove, a micro-blower is installed on the second installation disc, the micro-blower is used for blowing the second annular gear plate, and the second annular gear plate is in transmission cooperation with the bevel gear.

[0010] Further, the first installation disc top is provided with an annular groove, and a plurality of groups of rollers are rotatably installed in the annular groove.

[0011] Further, the top of the box is provided with an annular material falling port, a support is installed on the inner top of the box, a grid plate is installed in the annular material falling port, a sand discharging port is arranged on one side of the inner bottom of the box, a guide plate is rotatably installed at the bottom of the sand discharging port, the guide plate is located in the box and one end of the guide plate away from the sand discharging port is installed on the box through a spring, and a vibration exciter is installed between the inner bottom of the box and the guide plate.

[0012] Further, the blanking assembly comprises a second motor, a rotating shaft, a support arm and a scraper, a conical guard plate and a fairing are fixedly installed on the top of the box, the fairing is located on the inner side of the conical guard plate, the second motor is installed in the fairing, a rotating shaft is installed at the output end of the second motor, a support arm is installed on the rotating shaft, and a scraper parallel to the top surface of the box is installed at one end of the support arm away from the rotating shaft.

[0013] Further, the bottom of the annular cover is provided with a rubber plate, and a plurality of groups of slats are installed at the bottom of the rubber plate.

[0014] A shell manufacturing process for investment casting comprises the following specific steps:

[0015] The wax mold workpiece is fixed on the support disc of the support assembly, and after the wax mold workpiece is sprayed with paint, the support assembly and the wax mold workpiece are sent into the box through the conveying guide rail;

[0016] The hydraulic telescopic rod is elongated to insert the driving gear into the annular gear slot at the bottom of the limiting disc, the first motor drives the jacks and the first annular gear disc to rotate, the wax mold workpiece rotates with the mounting rod, and uniform sand spraying in the horizontal direction is performed on the wax mold workpiece;

[0017] The hydraulic telescopic rod is retracted, and the electric telescopic rod is elongated, so that the wax mold workpiece and the mounting rod are inclined upward, the conical gear is in transmission cooperation with the second annular gear disc, and the sand spraying operation in the upward inclination angle is performed on the wax mold workpiece under the driving action of the first motor;

[0018] After the sand spraying is completed, the support assembly is moved out of the box through the conveying guide rail for drying.

[0019] Compared with the prior art, the beneficial effects of the present application are as follows:

[0020] The shell manufacturing equipment and the shell manufacturing process provided by the present application can support and rotate the wax mold workpiece in the horizontal direction and in the upward inclination direction through the cooperation of the support assembly and the telescopic and rotatable power assembly, and can realize uniform sand spraying on the wax mold workpiece under the uniform sand discharging of the blanking assembly. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Fig. 2 This is a schematic diagram of the supporting component in this invention;

[0023] Fig. 3 This is a schematic diagram of the power component in this invention;

[0024] Fig. 4 This is a schematic diagram of the scraper structure in this invention.

[0025] In the diagram: 1. Box body; 11. Through groove; 12. Sand discharge port; 13. Support frame; 14. Guide plate; 15. Vibrator; 16. First mounting disc; 17. Annular groove; 18. Roller; 2. Support assembly; 21. Connecting rod; 22. Top plate; 23. Limiting disc; 24. First annular gear disc; 25. Clamping plate; 26. Mounting rod; 27. Driven gear; 28. Bevel gear; 29. ​​Support disc; 3. Conveying guide rail; 4. Wax model workpiece; 5. Power assembly; 51. Turntable; 52. First motor; 53. 54. Conical cover; 55. Top rod; 56. Guide sleeve; 57. Hydraulic telescopic rod; 58. Push plate; 59. Pressure signal acquisition module; 60. Second mounting disc; 61. Controller; 62. Electric telescopic rod; 63. Arc-shaped support plate; 64. Miniature blower; 65. Second annular gear disc; 66. Triangular plate; 67. Drive gear; 78. Annular cover; 79. Annular discharge port; 70. Mesh plate; 71. Conical guard plate; 72. Rectifier cover; 73. Rotating shaft; 74. Support arm; 75. Scraper; 8. Bracket. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figs. 1 to 4As shown, an investment casting shell-making device includes a housing 1, a support assembly 2, a power assembly 5, and a feeding assembly. Through slots 11 are provided on both sides of the housing 1, and a conveying guide rail 3 is arranged between the two through slots 11. The support assembly 2 is installed at the bottom of the conveying guide rail 3, and a wax model workpiece 4 is installed on the support assembly 2. Driven by an external power source, the support assembly 2 slides along the conveying guide rail 3. A support frame 13 is installed on the inner wall of the housing 1, and a first mounting disc 16 is fixedly installed on the top of the support frame 13. The support frames 13 are evenly installed on the first mounting disc... The side of the disc 16 provides stable support for the first mounting disc 16. A power component 5 is rotatably mounted on the first mounting disc 16. The power component 5 is used to drive the rotation of the support component 2 and adjust the support angle of the support component 2. A feeding component is installed on the top of the box 1. The feeding component is used to provide uniform sand to the box 1. By driving the support component 2 to rotate through the power component 5 and adjusting the support angle of the support component 2 on the wax model workpiece 4, the feeding component can provide sand to the box 1, so that the wax model workpiece 4 on the support component 2 can be uniformly sanded.

[0028] The support assembly 2 includes a connecting rod 21, a top plate 22, a limiting disc 23, and a mounting rod 26. The connecting rod 21 is connected to a chain inside the conveying guide rail 3. Driven by an external power source, the chain inside the conveying guide rail 3 can move the support assembly 2 along the erection direction of the conveying guide rail 3. The top plate 22 is fixedly installed at the bottom of the connecting rod 21. The limiting disc 23 is rotatably installed at the bottom of the top plate 22. Several sets of clamping plates 25 are evenly installed circumferentially at the bottom of the top plate 22. A collar is rotatably installed on each clamping plate 25. The collar is rotatably installed on the mounting rod 26. A support disc 29 is fixedly installed at the end of the mounting rod 26 away from the limiting disc 23. A wax model workpiece 4 is mounted on the support plate 29. A driven gear 27 is fixedly mounted on one end of the mounting rod 26 near the limiting disc 23. A bevel gear 28 is fixedly mounted on the end of the driven gear 27. A first annular gear disc 24 is fixedly mounted on the bottom of the limiting disc 23. The tooth surface of the limiting disc 23 faces the bottom of the housing 1. The driven gear 27 and the first annular gear disc 24 are in a transmission engagement. The bottom of the limiting disc 23 is provided with an annular tooth groove. Through the transmission engagement of the power component 5 with the annular tooth groove, the first annular gear disc 24 can be driven to engage with the driven gear 27, thereby driving the mounting rod 26 and the wax model workpiece 4 to rotate.

[0029] The power assembly 5 includes a turntable 51, a first motor 52, a conical cover 53, a push rod 54, and a guide sleeve 55. The turntable 51 is rotatably engaged with a first mounting disc 16. The first motor 52 is fixedly mounted on the bottom of the first mounting disc 16, and the output end of the first motor 52 is connected to the bottom of the turntable 51. Driven by the first motor 52, the turntable 51 can rotate on the first mounting disc 16. A hydraulic telescopic rod 56 is fixedly mounted on the bottom of the turntable 51. A push plate 57 is fixedly installed on the top of the rotating disk 51. Guide rods are connected between the top two sides of the push plate 57 and the bottom of the rotating disk 51. A top rod 54 is fixedly installed on the top of the push plate 57. An annular cover 67 is fixedly installed on the outer side of the top of the first mounting disk 16. A conical cover 53 is fixedly installed on the top of the annular cover 67. A guide sleeve 55 is installed on the top of the conical cover 53. The top rod 54 slides with the guide sleeve 55. A second mounting disk 59 is installed on the top of the guide sleeve 55. The top rod... A drive gear 66 is fixedly installed on the top of 54. The drive gear 66 is engaged with the annular toothed groove at the bottom of the limiting disc 23. The first motor 52 drives the turntable 51 and the push rod 54 to rotate, thereby driving the limiting disc 23 and the first annular toothed disc 24 to rotate, thus realizing the circumferential rotation of the wax model workpiece 4 in the horizontal direction. A pressure signal acquisition module 58 is embedded in the connection between the push rod 54 and the push plate 57. The pressure signal acquisition module 58 is used to collect the pressure signal between the push rod 54 and the push plate 57 and send the signal to the controller 6. The controller 6 is installed on the annular cover 67. When the drive gear 66 is inserted into the annular toothed groove at the bottom of the limiting disc 23, the pressure signal collected by the pressure signal acquisition module 58 will increase. When the pressure signal collected by the pressure signal acquisition module 58 reaches the pressure threshold set in the controller 6, the controller 6 sends a rotation command to the first motor 52, thereby realizing the first motor 52 driving the mounting rod 26 and the wax model workpiece 4 to rotate.

[0030] The second mounting disc 59 is circumferentially mounted with several sets of electric telescopic rods 61. An arc-shaped support plate 62 is rotatably mounted on the top of each electric telescopic rod 61. In its initial state, the arc-shaped support plate 62 rests on the bottom of the mounting rod 26. The contact point between the mounting rod 26 and the arc-shaped support plate 62 is located between the support disc 29 and the mounting rod 26. The extension and retraction of the electric telescopic rods 61 allows the mounting rod 26 to drive the wax model workpiece 4 to rotate around the clamping plate 25. Several sets of triangular plates 65 are connected between the bottom of the second mounting disc 59 and the guide sleeve 55 to reduce interference to the second mounting disc 59 when the electric telescopic rods 61 support the mounting rod 26. The second mounting disc 59 is provided with a second annular toothed disc 64, which rotatably engages with the second mounting disc 59. A ring is mounted on the inner side of the second annular toothed disc 64, and a guide block is mounted on the inner side of the ring. The top rod 54 is positioned along the top... A guide groove is provided in the extension direction of rod 54. The guide block slides in the guide groove. After the hydraulic telescopic rod 56 pulls the top rod 54 downward to disengage the drive gear 66 from the limiting disc 23, the second annular toothed disc 64 can still rotate under the drive of the top rod 54. A miniature blower 63 is installed on the second mounting disc 59. The miniature blower 63 is used to blow clean the second annular toothed disc 64 to ensure its cleanliness. The second annular toothed disc 64 is driven by the bevel gear 28. Under the extension of the electric telescopic rod 61, the mounting rod 26 rotates around the clamping plate 25, tilting and lifting the wax model workpiece 4 upward while making the bevel gear 28 contact the second annular toothed disc 64. Driven by the rotation of the first motor 52 and the top rod 54, the upwardly tilted wax model workpiece 4 can be sanded, which can avoid the occurrence of sanding dead corners, thereby improving the thickness and integrity of the shell after sanding.

[0031] The top of the first mounting disc 16 is provided with an annular groove 17, and a number of rollers 18 are rotatably installed in the annular groove 17. While the turntable 51 and the first mounting disc 16 are rotating and cooperating, the rotation of the rollers 18 can reduce the friction force experienced by the turntable 51 relative to the first mounting disc 16.

[0032] The top of the box 1 is provided with an annular discharge port 7. A bracket 8 is installed inside the top of the box 1 to provide stable support for the feeding assembly. A grid plate 71 is installed inside the annular discharge port 7. Driven by the feeding assembly, sand particles fall evenly from the annular discharge port 7 onto the wax model workpiece 4 inside the box 1. A sand discharge port 12 is provided on one side of the bottom of the box 1. A guide plate 14 is rotatably installed at the bottom of the sand discharge port 12. The guide plate 14 is located inside the box 1, and the end of the guide plate 14 away from the sand discharge port 12 is installed on the box 1 by a spring. A vibrator 15 is installed between the bottom of the box 1 and the guide plate 14. The vibrator 15 can quickly discharge the sand particles that fall to the bottom of the box 1, which is convenient for recycling.

[0033] The feeding assembly includes a second motor, a rotating shaft 74, a support arm 75, and a scraper 76. A conical guard plate 72 and a rectifier shell 73 are fixedly installed on the top of the housing 1. The rectifier shell 73 is located inside the conical guard plate 72. The second motor is installed inside the rectifier shell 73. The output end of the second motor is equipped with a rotating shaft 74. A support arm 75 is installed on the rotating shaft 74. A scraper 76 parallel to the top surface of the housing 1 is installed at the end of the support arm 75 away from the rotating shaft 74. The rotating shaft 74 is driven to rotate by the second motor, thereby enabling the scraper 76 to clean the sand particles between the rectifier shell 73 and the conical guard plate 72. This allows the sand particles to fall evenly into the housing 1 through the grid plate 71 and the annular discharge port 7. Combined with the rotation of the wax model workpiece 4 and the coating adhering to the wax model workpiece 4, the sand particles can be evenly adhered to the wax model workpiece 4.

[0034] The bottom of the annular cover 67 is provided with a rubber plate, and several sets of strips are installed on the bottom of the rubber plate. These strips can be used in conjunction with the rotation of the scraper 76 to scrape sand particles into the grid plate 71 and the annular discharge port 7, thereby achieving uniform material feeding.

[0035] A shell-making process for investment casting includes the following specific steps:

[0036] The wax model workpiece 4 is fixed on the support plate 29 on the support assembly 2. After the wax model workpiece 4 is coated with paint, the support assembly 2 and the wax model workpiece 4 are sent into the box 1 through the conveying guide rail 3.

[0037] The hydraulic telescopic rod 56 extends and inserts the drive gear 66 into the annular tooth groove at the bottom of the limiting disc 23. The first motor 52 drives the push rod 54 and the first annular tooth disc 24 to rotate, thereby realizing that the wax model workpiece 4 follows the installation rod 26 to rotate and perform a uniform sanding operation on the wax model workpiece 4 in the horizontal direction.

[0038] The hydraulic telescopic rod 56 retracts and drives the electric telescopic rod 61 to extend. As the wax model workpiece 4 and the mounting rod 26 tilt upward, the bevel gear 28 and the second ring gear 64 are engaged in transmission. Under the drive of the first motor 52, the wax model workpiece 4 is subjected to sanding operation at an upward tilt angle.

[0039] After the sand is applied, the support assembly 2 is moved out of the box 1 via the conveyor rail 3 for drying.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shell-making device for investment casting, comprising a housing (1), a support assembly (2), a power assembly (5), and a feeding assembly, characterized in that: The box (1) has through slots (11) on both sides, and a conveying guide rail (3) is provided between the through slots (11) on both sides. A support component (2) is installed at the bottom of the conveying guide rail (3), and a wax model workpiece (4) is installed on the support component (2). A support frame (13) is installed on the inner side wall of the box (1). A first mounting disc (16) is fixedly installed on the top of the support frame (13). The support frame (13) is evenly installed on the side of the first mounting disc (16). A power component (5) is rotatably installed on the first mounting disc (16). The power component (5) is used to drive the rotation of the support component (2) and adjust the support angle of the support component (2). A feeding component is installed on the top of the box (1). The feeding component is used to provide uniform sand material inside the box (1). The support assembly (2) includes a connecting rod (21), a top plate (22), a limiting disc (23), and a mounting rod (26). The connecting rod (21) is connected to the chain inside the conveying guide rail (3). The top plate (22) is fixedly installed at the bottom of the connecting rod (21). The limiting disc (23) is rotatably installed at the bottom of the top plate (22). Several sets of clamping plates (25) are evenly installed around the bottom of the top plate (22). A collar is rotatably installed on the clamping plate (25). The collar is rotatably installed on the mounting rod (26). The end of the mounting rod (26) away from the limiting disc (23) is fixedly installed. The device is equipped with a support plate (29), on which a wax model workpiece (4) is mounted. A driven gear (27) is fixedly mounted on one end of the mounting rod (26) near the limiting disc (23). A bevel gear (28) is fixedly mounted on the end of the driven gear (27). A first annular toothed disc (24) is fixedly mounted on the bottom of the limiting disc (23). The tooth surface of the limiting disc (23) faces the bottom of the housing (1). The driven gear (27) and the first annular toothed disc (24) are in transmission cooperation. An annular toothed groove is provided on the bottom of the limiting disc (23). The power assembly (5) includes a turntable (51), a first motor (52), a conical cover (53), a push rod (54), and a guide sleeve (55). The turntable (51) is rotatably coupled with a first mounting disc (16). The first motor (52) is fixedly mounted on the bottom of the first mounting disc (16), and the output end of the first motor (52) is connected to the bottom of the turntable (51). A hydraulic telescopic rod (56) is fixedly mounted on the bottom of the turntable (51), and a push plate (57) is fixedly mounted on the top of the hydraulic telescopic rod (56). Guide rods are connected between the top two sides of the push plate (57) and the bottom of the turntable (51). A push rod (54) is fixedly mounted on the top of the push plate (57), and an annular cover (67) is fixedly mounted on the outer top of the first mounting disc (16). A conical cover (53) is fixedly installed on the top of the annular cover (67). A guide sleeve (55) is installed on the top of the conical cover (53). The push rod (54) is slidably engaged with the guide sleeve (55). A second mounting disc (59) is installed on the top of the guide sleeve (55). A drive gear (66) is fixedly installed on the top of the push rod (54). The drive gear (66) is engaged with the annular tooth groove at the bottom of the limiting disc (23). A pressure signal acquisition module (58) is embedded in the connection between the push rod (54) and the push plate (57). The pressure signal acquisition module (58) is used to acquire the pressure signal between the push rod (54) and the push plate (57) and send the signal to the controller (6). The controller (6) is installed on the annular cover (67).

2. The investment casting shell-making equipment according to claim 1, characterized in that: The second mounting disc (59) is circumferentially mounted with several sets of electric telescopic rods (61). An arc-shaped support plate (62) is rotatably mounted on the top of each electric telescopic rod (61). In the initial state, the arc-shaped support plate (62) rests on the bottom of the mounting rod (26). The contact point between the mounting rod (26) and the arc-shaped support plate (62) is located between the support disc (29) and the mounting rod (26). Several sets of triangular plates (65) are connected between the bottom of the second mounting disc (59) and the guide sleeve (55). The second mounting disc (59) is provided with a second annular tooth. The second annular toothed disc (64) is rotatably engaged with the second mounting disc (59). A ring is installed on the inner side of the second annular toothed disc (64), and a guide block is installed on the inner side of the ring. A guide groove is provided on the push rod (54) along the extension direction of the push rod (54). The guide block is slidably engaged with the guide groove. A miniature blower (63) is installed on the second mounting disc (59). The miniature blower (63) is used to blow the second annular toothed disc (64). The second annular toothed disc (64) is driven by a bevel gear (28).

3. The investment casting shell-making equipment according to claim 2, characterized in that: The top of the first mounting disc (16) is provided with an annular groove (17), and several sets of rollers (18) are rotatably mounted in the annular groove (17).

4. The investment casting shell-making equipment according to claim 3, characterized in that: The top of the box (1) is provided with an annular discharge port (7), and a bracket (8) is installed inside the top of the box (1). A grid plate (71) is installed inside the annular discharge port (7). A sand discharge port (12) is provided on one side of the bottom of the box (1). A guide plate (14) is rotatably installed at the bottom of the sand discharge port (12). The guide plate (14) is located inside the box (1), and the end of the guide plate (14) away from the sand discharge port (12) is installed on the box (1) by a spring. A vibrator (15) is installed between the bottom of the box (1) and the guide plate (14).

5. The investment casting shell-making equipment according to claim 4, characterized in that: The feeding assembly includes a second motor, a rotating shaft (74), a support arm (75), and a scraper (76). A conical guard plate (72) and a rectifier shell (73) are fixedly installed on the top of the housing (1). The rectifier shell (73) is located inside the conical guard plate (72). The second motor is installed inside the rectifier shell (73). A rotating shaft (74) is installed at the output end of the second motor. A support arm (75) is installed on the rotating shaft (74). A scraper (76) parallel to the top surface of the housing (1) is installed at the end of the support arm (75) away from the rotating shaft (74).

6. The investment casting shell-making equipment according to claim 5, characterized in that: The bottom of the annular cover (67) is provided with a rubber plate, and several sets of strips are installed on the bottom of the rubber plate.

7. The investment casting shell-making equipment according to any one of claims 1-6, characterized in that: It also includes an investment casting shell-making process, comprising the following specific steps: The wax model workpiece (4) is fixed on the support plate (29) on the support assembly (2). After the wax model workpiece (4) is coated with paint, the support assembly (2) and the wax model workpiece (4) are sent into the box (1) through the conveying guide rail (3). The hydraulic telescopic rod (56) extends and inserts the drive gear (66) into the annular tooth groove at the bottom of the limiting disc (23). The first motor (52) drives the top rod (54) and the first annular tooth disc (24) to rotate. The wax model workpiece (4) rotates with the mounting rod (26) and performs a uniform horizontal sanding operation on the wax model workpiece (4). The hydraulic telescopic rod (56) retracts and drives the electric telescopic rod (61) to extend. The wax model workpiece (4) and the mounting rod (26) tilt upward, while the bevel gear (28) and the second ring gear plate (64) are engaged in transmission. Under the driving action of the first motor (52), the wax model workpiece (4) is subjected to sanding operation with an upward tilt angle. After the sand is applied, the support assembly (2) is moved out of the box (1) by the conveying guide rail (3) for drying.

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