An alternating feed conveyor for a dental mold processing line

Abstract

The application discloses an alternating feeding and transporting device for a dental mold processing line body, relates to the field of dental mold transfer processing, and comprises a transfer frame body arranged between a feeding and conveying line body and a processing station. A group of first sliding rails and a group of second sliding rails are fixedly arranged on the top and inner wall of the transfer frame body, respectively. A first sliding plate is slidingly arranged on the first sliding rails, and a second sliding plate is slidingly arranged on the second sliding rails. The first sliding plate and the second sliding plate are horizontally arranged. The alternating transfer units in the transfer frame body can drive the first sliding plate and the second sliding plate to alternately and reciprocally move with the two loading tables. After moving to a suitable position, the dental mold above the loading table can be jacked up under the drive of a jacking unit, so that the processing station can finely process the dental mold, and a mechanical hand can conveniently take and place the dental mold. The first sliding plate and the second sliding plate can simultaneously alternately transfer the dental mold, so that the efficiency of processing the dental mold can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of dental mold transfer and processing, specifically to an alternating feeding and transport device for a dental mold processing line. Background Technology

[0002] During the process of transferring 3D-printed dental molds to the conveyor line for finishing, a robotic arm clamps each mold onto a feeding device, which then transfers it to the processing station on the conveyor line. After processing, the finished mold needs to be transferred out. Therefore, the steps for fine processing of the dental molds are: the robotic arm picks up the mold to be processed and places it on the feeding device → the feeding device transfers the mold to the processing station for fine processing → after processing, the feeding device moves back to its original position with the mold → the robotic arm picks up the finished mold and unloads it. With the above processing method, one round trip of the feeding device can only process one mold, which is too inefficient and cannot efficiently process the transported molds. Summary of the Invention

[0003] The purpose of this invention is to provide an alternating feeding and transport device for a dental mold processing line to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an alternating feeding and transporting device for a dental mold processing line, comprising: a transfer frame erected between the feeding and transporting line and the processing station, wherein a set of first slide rails and a set of second slide rails are fixedly mounted on the top and inner wall of the transfer frame, and a first slide plate is slidably mounted on the first slide rail and a second slide plate is slidably mounted on the second slide rail, wherein the first slide plate and the second slide plate are both horizontally placed, and a loading platform is mounted above the first slide plate and the second slide plate, the loading platform being used to support the dental mold;

[0005] It also includes: an alternating transfer unit for alternatingly transferring the dental mold carried on the first slide plate and the second slide plate, the alternating transfer unit being disposed between the first slide plate and the second slide plate;

[0006] The lifting unit is used to lift the loading platform upwards to perform fine machining and loading / unloading of the dental mold. The lifting unit is located inside the transfer frame.

[0007] Preferably, the jacking unit includes two cylinder push rods, which are respectively located at both ends inside the transfer rack body. And one end of the cylinder push rod located inside the transfer rack body has its output end facing upward, and a push plate is fixedly arranged at the output end of the cylinder push rod. The second sliding plate is in a "C" shape and is distributed outside one of the cylinder push rods and the push plate. A limiting frame plate is arranged above the second sliding plate, and a plurality of columns distributed in a rectangle are fixedly arranged at the bottom of the limiting frame plate, and the columns slide through the second sliding plate.

[0008] Preferably, the tops of the first sliding plate and the limiting frame plate are both hollow. The two loading platforms respectively cover the first sliding plate and the limiting frame plate. At least two positioning columns are arranged at the center of the top of the loading platform, and the positioning columns are used to dock with the positioning holes at the bottom of the dental mold to limit the dental mold. A first hollow cavity is arranged inside the loading platform, and a plurality of suction holes are distributed on the outer periphery of the positioning column, and the bottom of the suction hole communicates with the first hollow cavity. A holding component and a negative pressure limiting component are arranged between the loading platform and the first sliding plate and between the loading platform and the limiting frame plate.

[0009] Preferably, the holding component includes two groups of connecting plates rotatably assembled on the two pairs of side walls of the loading platform. The number of each group of connecting plates is two and they are symmetrically distributed. Sliding grooves are opened on the two pairs of side walls of the first sliding plate and the limiting frame plate, and the bottom of the connecting plate is slidably assembled with the sliding groove. The maximum deflection angle of the connecting plate is less than 80 degrees.

[0010] Preferably, the negative pressure limiting component includes a sealing sleeve fixed outside the first sliding plate and the second sliding plate. A second hollow cavity is communicated and opened at the bottom of the first hollow cavity, and the axis of the second hollow cavity is perpendicular to the first slide rail and the second slide rail. A piston disc is slidably assembled inside each sealing sleeve. A second spring is arranged on one side of the piston disc close to the loading platform, and the other end of the piston disc is fixedly provided with a right-angle push rod slidably penetrating through the sealing sleeve. An air groove is also opened inside the loading platform. One end of the air groove is docked with the second hollow cavity, and a trachea is fixedly connected between the other end and the end of the sealing sleeve. A second one-way valve is assembled on the outer surface of the sealing sleeve. The docking port of the trachea and the sealing sleeve faces the loading platform, and a first one-way valve is assembled in the docking port between the two. The flow direction of the second one-way valve is unidirectional flow from the inside to the outside of the sealing sleeve, and the flow direction of the first one-way valve is unidirectional flow from the trachea to the inside of the sealing sleeve. A triggering member is arranged between the first sliding plate, the second sliding plate and the transfer rack body.

[0011] Preferably, the actuating element includes a toothed disc rotatably mounted on the surfaces of the first and second sliding plates, with the axis of the toothed disc perpendicularly intersecting the axis of the sealing sleeve. A protrusion is concentrically fixed on one end face of the toothed disc near the right-angle push rod, and the outer surface of the protrusion slides in contact with the end face of the right-angle push rod away from the piston disc. A toothed plate fixed to the transfer frame is provided on the outer side of the first sliding plate and the limiting frame plate, and the toothed plate is movably engaged with the toothed disc.

[0012] Preferably, a vent is provided between the connecting plate and the second hollow cavity. The vent includes an air hole formed inside the material carrier platform. One end of the air hole communicates with the second hollow cavity, and the other end faces the connecting plate. A limiting frame is fixedly provided inside the connecting plate. A sliding plate is slidably assembled inside the limiting frame. A first spring is provided between the end of the sliding plate away from the material carrier platform and the limiting frame. A dome sealing post is also fixedly provided inside the sliding plate, and the dome port of the dome sealing post blocks the port of the air hole.

[0013] Preferably, the alternating transfer unit includes a transmission toothed belt mounted on the inner wall of the transfer frame via synchronous gear transmission, and the upper and lower end faces of the transmission toothed belt are horizontally placed. The side walls of the first slide plate and the second slide plate are respectively fixedly mounted to the upper and lower end faces of the transmission toothed belt. An electric motor is fixedly mounted on the outer wall of the transfer frame, and the output end of the electric motor is fixed to one of the synchronous gears. An adjustment component is also provided between the limiting frame plate and the transfer frame.

[0014] Preferably, the adjusting component includes a vertical plate fixed to the center of the inside of the transfer frame, the vertical plate being arranged vertically, a V-shaped groove being formed inside the vertical plate, a retaining plate being fixedly provided at the bottom of the limiting frame plate, and a sliding rod being fixedly provided on the retaining plate and slidably embedded inside the V-shaped groove.

[0015] Preferably, when the slide bar is located at the end of the V-groove, the upper surfaces of the first slide plate and the limiting frame plate are on the same horizontal plane.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention enables the first and second sliding plates to move alternately back and forth with two material carriers by the alternating transfer unit inside the transfer frame. After each movement to a suitable position, the lifting unit lifts the dental mold above the material carrier, thus facilitating the fine processing of the dental mold at the processing station and the picking and placing of the dental mold by the robot arm. By alternatingly transferring the dental mold with the first and second sliding plates at the same time, the efficiency of dental mold processing can be effectively improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the electric motor position distribution structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the transmission toothed belt structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the vertical plate and V-groove structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the assembly state of the V-groove and slide bar of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal structure of the material carrier platform of the present invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of the limiting sleeve of the present invention;

[0025] Figure 8 This is a schematic diagram of the second hollow cavity and air groove structure of the present invention.

[0026] In the diagram: 1. Transfer frame; 2. Vertical plate; 3. First slide rail; 4. Second slide rail; 5. Transmission toothed belt; 6. Motor; 7. First sliding plate; 8. Second sliding plate; 9. Loading platform; 10. Cylinder push rod; 11. Push plate; 12. Limiting frame plate; 13. Column; 14. V-groove; 15. Holding plate; 16. Slide rod; 17. Positioning post; 18. Suction hole; 19. First hollow cavity; 20. 21. Second hollow cavity; 22. Connecting plate; 23. Slide groove; 24. Air hole; 25. Limiting sleeve; 26. Slide plate; 27. Air groove; 28. First spring; 29. ​​Dome sealing column; 30. Sealing sleeve; 31. Piston plate; 32. Second spring; 33. First one-way valve; 34. Second one-way valve; 35. Air pipe; 36. Right angle push rod; 37. Gear plate; 38. Protrusion; 39. Gear plate. Detailed Implementation

[0027] 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.

[0028] Example 1: Please refer to Figures 1-8, As shown in the figure, an alternating feeding and transporting device for a dental mold processing line body includes: a transfer frame body 1 erected between a feeding conveyor line body and a processing station. A set of first slide rails 3 and a set of second slide rails 4 are respectively fixedly assembled on the top and inner wall of the transfer frame body 1. A first slide plate 7 is slidably assembled on the first slide rail 3, and a second slide plate 8 is slidably assembled on the second slide rail 4. Both the first slide plate 7 and the second slide plate 8 are horizontally placed, and a loading table 9 for carrying dental molds is loaded above both the first slide plate 7 and the second slide plate 8.

[0029] It further includes: an alternating transfer unit for performing alternating transfer processing on the dental molds carried above the first slide plate 7 and the second slide plate 8. The alternating transfer unit is arranged between the first slide plate 7 and the second slide plate 8.

[0030] A jacking unit for jacking up the loading table 9 upward to perform fine processing and loading and unloading of dental molds. The jacking unit is arranged inside the transfer frame body 1.

[0031] The jacking unit includes two cylinder push rods 10, which are respectively located at both ends inside the transfer frame body 1. And the cylinder push rod 10 is located at one end inside the transfer frame body 1. The output end of the cylinder push rod 10 faces upward, and a push plate 11 is fixedly arranged at the output end of the cylinder push rod 10. The second slide plate 8 is in a "C" shape and is distributed outside one of the cylinder push rods 10 and the push plate 11. A limiting frame plate 12 is arranged above the second slide plate 8, and a plurality of upright columns 13 distributed in a rectangular shape are fixedly arranged at the bottom of the limiting frame plate 12. The upright columns 13 slidably penetrate through the second slide plate 8. That is, when the second slide plate 8 moves towards the cylinder push rod 10 to the maximum position, the second slide plate 8 is sleeved outside the cylinder push rod 10. When the push plate 11 moves upward, the loading table 9 can be jacked up.

[0032] The alternating transfer unit includes a transmission belt 5 assembled on the inner wall of the transfer frame body 1 through synchronous gears. The upper and lower end faces of the transmission belt 5 are horizontally placed. The side walls of the first slide plate 7 and the second slide plate 8 are respectively fixedly assembled with the upper and lower end faces of the transmission belt 5. A motor 6 is fixedly erected on the outer wall of the transfer frame body 1, and the output end of the motor 6 is fixed to one of the synchronous gears. An adjusting component is also arranged between the limiting frame plate 12 and the transfer frame body 1. During the process of the transmission belt 5 driving the first slide plate 7 and the second slide plate 8 to move synchronously in opposite directions, under the action of the adjusting component, the positions of the first slide plate 7 and the second slide plate 8 can be swapped.

[0033] The adjusting component includes a vertical plate 2 fixed in the center of the transfer frame 1. The vertical plate 2 is vertically arranged and has a V-shaped groove 14 inside. A retaining plate 15 is fixedly arranged at the bottom of the limiting frame 12, and a sliding rod 16 is fixedly arranged in the retaining plate 15 and slidably embedded in the V-shaped groove 14. Each time the second slide plate 8 moves laterally inside the transfer frame 1, the limiting frame 12 can be lowered and then raised by the limiting guide of the sliding rod 16 through the V-shaped groove 14. During the time of lowering and raising, the first slide plate 7 passes over the limiting frame 12.

[0034] When the slide bar 16 is located at the end of the V-groove 14, the upper surfaces of the first slide plate 7 and the limiting frame plate 12 are on the same horizontal plane. This ensures that during the alternating transfer of the dental mold, the plane on which the dental mold is located before and after loading and unloading is on the same horizontal plane, thus ensuring the accuracy of the robot arm in picking up and placing the dental mold.

[0035] Example 2: Please refer to Figures 6-8 This embodiment is a further explanation of other embodiments. The tops of the first sliding plate 7 and the limiting frame plate 12 are both hollow, allowing the push plate 11 to pass through the interior of the first sliding plate 7 and the limiting frame plate 12. Two material carriers 9 respectively cover the first sliding plate 7 and the limiting frame plate 12. At least two positioning posts 17 are provided at the center of the top of the material carrier 9. The positioning posts 17 are used to mate with the positioning holes at the bottom of the dental mold, thus limiting the dental mold. The interior of the material carrier 9 is provided with a first hollow cavity 19. Several suction holes 18 are distributed around the outer periphery of the positioning posts 17, and the bottom of the suction holes 18 is connected to the first hollow cavity 19. The hollow cavity 19 is interconnected. A holding component and a negative pressure limiting component are provided between the material platform 9 and the first slide plate 7, and between the material platform 9 and the limiting frame plate 12. Under the limitation of the holding component, the material platform 9 can be stably moved axially above the first slide plate 7 or the limiting frame plate 12. When the first slide plate 7 and the limiting frame plate 12 move laterally, the air inside the first hollow cavity 19 can be sucked out by the negative pressure limiting component. When the dental mold is placed above the material platform 9, the bottom surface of the dental mold will cover the upper port of the suction hole 18, thereby performing negative pressure suction limiting treatment on the dental mold.

[0036] The retaining component includes two sets of connecting plates 21 rotatably mounted on two pairs of side walls of the loading platform 9. Each set of connecting plates 21 consists of two plates, which are symmetrically distributed. The first sliding plate 7 and the two pairs of side walls of the limiting frame plate 12 are provided with sliding grooves 22, and the bottom of the connecting plate 21 is slidably assembled with the sliding groove 22. The maximum deflection angle of the connecting plate 21 is less than 80 degrees. With the cooperation of the two sets of connecting plates 21 and sliding grooves 22, the loading platform 9 can be prevented from swaying randomly above the first sliding plate 7. In order to ensure the stability of the loading platform 9 in bearing the dental mold, at least two positioning pins are fixed on the upper end face of the first sliding plate 7 and the limiting frame plate 12, while the bottom of the loading platform 9 is provided with positioning holes that cooperate with the positioning pins.

[0037] The negative pressure limiting assembly includes a sealing sleeve 29 fixed to the outside of the first slide plate 7 and the second slide plate 8. A second hollow cavity 20 is opened at the bottom of the first hollow cavity 19. The axis of the second hollow cavity 20 is perpendicular to the first slide rail 3 and the second slide rail 4. A piston disc 30 is slidably mounted inside each sealing sleeve 29. A second spring 31 is provided on the side of the piston disc 30 near the loading platform 9, and a right-angle push rod 35 that slides through the sealing sleeve 29 is fixedly provided at the other end of the piston disc 30. An air groove 26 is also opened inside the loading platform 9. One end of the air groove 26 is connected to the second hollow cavity 20, and an air pipe 34 is fixedly connected between the other end and the end of the sealing sleeve 29. A second one-way valve 33 is mounted on the outer surface of the sealing sleeve 29. The interface between the air pipe 34 and the sealing sleeve 29 faces the loading platform 9, and a first one-way valve 32 is installed inside the interface between the two. The flow direction of the second one-way valve 33 is one-way flow from the inside of the sealing sleeve 29 to the outside, and the flow direction of the first one-way valve 32 is one-way flow from the air pipe 34 to the inside of the sealing sleeve 29. A trigger is provided between the first slide plate 7 and the second slide plate 8 and the transfer frame 1. When the first slide plate 7 and the second slide plate 8 are moving, the trigger can cause the right-angle push rod 35 to move back and forth with the piston disc 30 inside the sealing sleeve 29. Combined with the action of the second one-way valve 33 and the first one-way valve 32, the gas inside the second hollow cavity 20 and the first hollow cavity 19 can be drawn. The air pipe 34 is a flexible hose that can be bent and folded.

[0038] The actuating element includes a geared disc 36 rotatably mounted on the surfaces of the first slide plate 7 and the second slide plate 8. The axis of the geared disc 36 is perpendicular to the axis of the sealing sleeve 29. A protrusion 37 is concentrically fixed on one end face of the geared disc 36 near the right-angle push rod 35. The outer surface of the protrusion 37 slides in contact with the end face of the right-angle push rod 35 away from the piston disc 30. A geared plate 38 fixed to the transfer frame 1 is provided on the outer side of the first slide plate 7 and the limiting frame plate 12. The geared plate 38 is movably engaged with the geared disc 36. Therefore, when the first slide plate 7 and the second slide plate 8 reciprocate, the protrusion 37 can be continuously rotated through the engagement of the geared plate 38 with the geared disc 36, thereby continuously pushing the right-angle push rod 35.

[0039] A vent is provided between the connecting plate 21 and the second hollow cavity 20. The vent includes an air hole 23 inside the loading platform 9. One end of the air hole 23 communicates with the second hollow cavity 20, and the other end faces the connecting plate 21. A limiting sleeve 24 is fixedly provided inside the connecting plate 21. A sliding plate 25 is slidably assembled inside the limiting sleeve 24. A first spring 27 is provided between the end of the sliding plate 25 away from the loading platform 9 and the limiting sleeve 24. A dome sealing post 28 is also fixedly provided inside the sliding plate 25. The dome end of the dome sealing post 28 blocks the port of the air hole 23. By sealing the end of the air hole 23 with the end of the dome sealing post 28, when the lower end face of the dental mold covers the top of the suction hole 18, the suction of the piston plate 30 can make the dental mold adhere to the upper end face of the loading platform 9, thereby limiting the loading platform 9.

[0040] Working principle: (Reference) Figures 1-3 The positions of the two loading platforms 9 are as follows: the initial position of the first sliding plate 7 is the loading / unloading station, and the position of the limiting frame plate 12 is the processing station. At this time, the robot arm places the dental mold to be processed on the loading platform 9 above the first sliding plate 7. The transmission belt 5 is driven by the motor 6 to move the first sliding plate 7 towards the position of the limiting frame plate 12. The second sliding plate 8 will then move the limiting frame plate 12 in the opposite direction. During the reverse movement of the second sliding plate 8 with the limiting frame plate 12, the limiting frame plate 12 can be lowered and then raised again by the action of the V-groove 14 and the sliding rod 16. During the time of lowering and raising, the first sliding plate 7 can just pass over the top of the limiting frame plate 12. This allows the first slide plate 7 to move to the position of the limiting frame plate 12, which is then positioned exactly at the first slide plate 7. This achieves the alternation of positions between the first slide plate 7 and the limiting frame plate 12. After the position alternation is completed, the cylinder push rod 10 drives the push plate 11 to lift the loading platform 9 upwards, allowing the dental mold to rise into the processing station for processing. At this time, the loading platform 9 on the first slide plate 7 does not hold the dental mold to be processed. While the dental mold above the limiting frame plate 12 is undergoing fine processing, the robot arm can also place the dental mold to be processed on the loading platform 9 above the first slide plate 7. Through the above-mentioned alternating processing and alternating loading method, the efficiency of batch dental mold processing can be greatly improved.

[0041] In this scheme, in order to ensure the stability of the loading platform 9 in supporting the movement of the dental mold, in addition to restricting the dental mold by the positioning column 17, during the movement of the first sliding plate 7 and the second sliding plate 8, the right-angle push rod 35 will be frequently pushed by the rotation of the toothed plate 36 and the protrusion 37. At the same time, with the action of the second spring 31, the piston plate 30 can reciprocate inside the sealing sleeve 29. Air is drawn into the second hollow cavity 20 through the air pipe 34, so that the lower end plane of the dental mold can be stably adsorbed on the upper end surface of the loading platform 9 and will not easily shake.

[0042] In this solution, considering that if the dental mold is formed by fused deposition modeling 3D printing technology, there will be a large gap between the lower end face of the dental mold and the upper end face of the loading platform 9, the piston disk 30 can only perform negative pressure stabilization on the dental mold above the loading platform 9 once each time it draws gas. The stabilization process is repeated through frequent drawing.

[0043] If the dental mold is formed by photopolymer 3D printing technology, its lower end surface is smooth and flat, which can effectively fit the upper end surface of the loading platform 9. At this time, the first suction of the piston disc 30 can stably limit the negative pressure of the dental mold to the upper end surface of the loading platform 9. In order not to affect the processing of the dental mold on the loading platform 9, and not to affect the unloading of the dental mold on the loading platform 9 by the robot, when the two cylinder push rods 10 drive the push plate 11 to push the loading platform 9 upward, the connecting plate 21 will deflect with the limiting sleeve 24, thereby separating the dome port of the dome sealing column 28 from the port of the air hole 23, allowing the second hollow cavity 20 to communicate with the outside air through the air hole 23, so that the dental mold above the loading platform 9 is no longer affected by the negative pressure, thereby ensuring the normal picking up of the dental mold by the robot and ensuring the normal processing of the dental mold on the loading platform 9.

[0044] 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.

[0045] 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. An alternating feeding and conveying device for a dental mold processing line, characterized in that, include: A transfer frame (1) is installed between the material supply and conveying line and the processing station. The top and inner wall of the transfer frame (1) are respectively fixedly equipped with a first slide rail (3) and a second slide rail (4). A first slide plate (7) is slidably installed on the first slide rail (3) and a second slide plate (8) is slidably installed on the second slide rail (4). A loading platform (9) is mounted above the first slide plate (7) and the second slide plate (8). The loading platform (9) is used to carry the dental mold. Also includes: An alternating transfer unit is used to perform alternating transfer processing on the dental mold carried above the first slide plate (7) and the second slide plate (8), and the alternating transfer unit is disposed between the first slide plate (7) and the second slide plate (8); The lifting unit is used to lift the loading platform (9) upward to perform fine processing and loading / unloading of the dental mold. The lifting unit is located inside the transfer frame (1). The lifting unit includes two cylinder push rods (10), which are located at both ends inside the transfer frame (1). The output end of the cylinder push rod (10) is also fixedly provided with a push plate (11). A limit frame plate (12) is provided above the second slide plate (8), and a number of rectangular columns (13) are fixedly provided at the bottom of the limit frame plate (12). The columns (13) slide through the second slide plate (8). The tops of the first slide plate (7) and the limiting frame plate (12) are hollow. The two material carriers (9) respectively cover the first slide plate (7) and the limiting frame plate (12). At least two positioning posts (17) are provided at the top center of the material carrier (9). The positioning posts (17) are used to connect with the positioning holes at the bottom of the dental mold. The material carrier (9) has a first hollow cavity (19) inside. Several suction holes (18) are distributed on the outer periphery of the positioning posts (17). The bottom of the suction holes (18) communicates with the first hollow cavity (19). A holding component and a negative pressure limiting component are provided between the material carrier (9) and the first slide plate (7) and between the material carrier (9) and the limiting frame plate (12). The retaining assembly includes two sets of connecting plates (21) rotatably mounted on two pairs of side walls of the loading platform (9). The first sliding plate (7) and the two pairs of side walls of the limiting frame plate (12) are provided with sliding grooves (22), and the bottom of the connecting plate (21) is slidably mounted with the sliding grooves (22). The negative pressure limiting assembly includes a sealing sleeve (29) fixed to the outside of the first sliding plate (7) and the second sliding plate (8). The bottom of the first hollow cavity (19) is connected to a second hollow cavity (20). A piston disc (30) is slidably assembled inside each sealing sleeve (29). A second spring (31) is provided on the side of the piston disc (30) near the material platform (9), and a right-angle push rod (35) is fixedly provided on the other end of the piston disc (30). An air vent is also provided inside the material platform (9). The air groove (26) has one end connected to the second hollow cavity (20) and the other end is fixedly connected to the sealing sleeve (29) by an air pipe (34). The outer surface of the sealing sleeve (29) is equipped with a second one-way valve (33). The interface between the air pipe (34) and the sealing sleeve (29) faces the loading platform (9), and the interface between the two is equipped with a first one-way valve (32). The first slide plate (7) and the second slide plate (8) are provided with a trigger between them and the transfer frame (1). The alternating transfer unit includes a transmission toothed belt (5) mounted on the inner wall of the transfer frame (1) via synchronous gear transmission. The side walls of the first slide plate (7) and the second slide plate (8) are respectively fixedly mounted to the upper and lower end faces of the transmission toothed belt (5). The outer wall of the transfer frame (1) is fixedly mounted with a motor (6), and the output end of the motor (6) is fixed to one of the synchronous gears. An adjustment component is also provided between the limiting frame plate (12) and the transfer frame (1).

2. The alternating feeding and conveying device for a dental mold processing line according to claim 1, characterized in that: The actuating element includes a toothed disc (36) rotatably mounted on the surfaces of the first slide plate (7) and the second slide plate (8). A protrusion (37) is fixedly provided on one end face of the toothed disc (36) near the right-angle push rod (35), and the outer surface of the protrusion (37) slides in contact with the end face of the right-angle push rod (35) away from the piston disc (30). A toothed plate (38) fixed to the transfer frame (1) is provided on the outer side of the first slide plate (7) and the limiting frame plate (12), and the toothed plate (38) is movably engaged with the toothed disc (36).

3. The alternating feeding and conveying device for a dental mold processing line according to claim 1, characterized in that: A vent is provided between the connecting plate (21) and the second hollow cavity (20). The vent includes an air hole (23) opened inside the loading platform (9). One end of the air hole (23) communicates with the second hollow cavity (20), and the other end faces the connecting plate (21). A limiting sleeve (24) is fixedly provided inside the connecting plate (21). A sliding plate (25) is slidably assembled inside the limiting sleeve (24). A first spring (27) is provided between the end of the sliding plate (25) away from the loading platform (9) and the limiting sleeve (24). A dome sealing column (28) is also fixedly provided inside the sliding plate (25), and the dome sealing column (28) is blocked at the port of the air hole (23).

4. The alternating feeding and conveying device for a dental mold processing line according to claim 1, characterized in that: The adjusting component includes a vertical plate (2) fixed in the center of the transfer frame (1), a V-groove (14) is provided inside the vertical plate (2), a retaining plate (15) is fixedly provided at the bottom of the limiting frame plate (12), and a sliding rod (16) is fixedly provided in the retaining plate (15) and slidably embedded in the V-groove (14).

5. The alternating feeding and conveying device for a dental mold processing line according to claim 4, characterized in that: When the slide bar (16) is located at the end of the V-groove (14), the upper surfaces of the first slide plate (7) and the limiting frame plate (12) are on the same horizontal plane.

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