Forming mold and paper dinner plate forming machine

Abstract

The present application relates to the technical field of paper tray processing, and provides a forming mold, including an upper mold, a lower mold and a blanking assembly; the lower side of the upper mold is provided with a plurality of forming grooves, and the upper mold is provided with a plurality of give-way grooves; the upper side of the lower mold is provided with a plurality of forming protrusions, and each of the forming protrusions is provided with a plurality of reinforcing grooves; the blanking assembly includes a connecting plate, a plurality of reinforcing protrusions, a connecting column, a connecting gear and a connecting rack; the connecting plate is slidably connected to the upper mold; a plurality of the reinforcing protrusions are provided on the lower side of the connecting plate, and each of the reinforcing protrusions is used to be embedded in each of the reinforcing grooves; the connecting column is provided on the connecting plate; the connecting gear is rotatably connected to the upper mold and is threadedly connected to the connecting column; the connecting rack is provided on the frame of the paper tray forming machine and one side is meshed with the connecting gear. Based on this, the normal blanking of the paper tray can be guaranteed as much as possible. In addition, a paper tray forming machine is also provided.

Description

Technical Field

[0001] The present application relates to the field of paper dinner plate processing, and in particular to a forming mold and a paper dinner plate forming machine. Background Art

[0002] Paper dinner plates are tableware made of paper material, which are used to replace traditional plastic dinner plates to reduce environmental pollution. Because paper dinner plates are lightweight, easy to degrade, and environmentally friendly, they are widely used in some fast food restaurants, takeaways, and other occasions. Among them, paper dinner plates are processed by a forming machine.

[0003] Reference Figure 1 In the related art, a paper plate forming machine includes a frame 5, a pulp barrel 6, a heating device (not shown in the figure), a forming mold, a lifting device 7 and a transfer device 8. The pulp barrel 6 and the heating device are arranged in the frame 5. The forming mold includes a lower mold 2 and an upper mold 1. The lower mold 2 is located below the upper mold 1 and is connected to the frame 5 by sliding in a vertical direction under the drive of the lifting device 7. The upper mold 1 is connected to the frame 5 by sliding in a horizontal direction under the drive of the transfer device 8.

[0004] During operation, the lifting device drives the lower mold to extend into the pulp barrel, and then drives the lower mold to extend out of the pulp barrel and make the lower mold abut against the upper mold. At this time, the pulp in the lower mold and the upper mold is heated by the heating device to realize the molding of multiple paper dinner plates. After the lifting device drives the lower mold to separate from the upper mold, the paper dinner plate is located in the upper mold, and the transfer device drives the upper mold to move to the unloading station to facilitate unloading of the paper dinner plate.

[0005] However, in actual applications, during the separation process of the lower mold and the upper mold, the paper dinner plate sometimes lies in or falls into the lower mold, affecting the normal feeding of the paper dinner plate, so improvement is needed. Summary of the invention

[0006] In order to ensure the normal feeding of paper dinner plates as much as possible, in a first aspect, the present application provides a forming mold.

[0007] A molding die provided in this application adopts the following technical solution:

[0008] A molding die, comprising an upper die, a lower die and a blanking assembly; a plurality of molding grooves are arranged on the lower side of the upper die, and a plurality of clearance grooves are arranged at intervals on the upper die at each of the molding grooves; a plurality of molding protrusions matching the plurality of molding grooves are arranged on the upper side of the lower die, and each of the molding protrusions is provided with a plurality of reinforcing grooves matching the plurality of clearance grooves;

[0009] The blanking assembly includes a connecting plate, a plurality of reinforcing protrusions, a connecting column, a connecting gear and a connecting rack; the connecting plate is slidably connected to the upper mold in the vertical direction; a plurality of the reinforcing protrusions are arranged on the lower side of the connecting plate, and each of the reinforcing protrusions is movably penetrated in each of the give way grooves and is used to be embedded in each of the reinforcing grooves; the connecting column is arranged on the connecting plate and penetrates the upper mold; the connecting gear is rotatably connected to the upper side of the upper mold and is threadedly connected to the connecting column; the connecting rack is arranged on the frame of the paper plate forming machine and one side is meshed with the connecting gear.

[0010] By adopting the above technical solution, in actual application, when the lower mold abuts against the upper mold, each molding protrusion is embedded in each molding groove, and at the same time, each reinforcement protrusion is penetrated through each give way groove and embedded in the reinforcement groove, so that a cavity for forming a paper dinner plate can be formed. After the paper dinner plate is formed, the paper dinner plate can be tightly connected to the multiple reinforcement protrusions. Even if the lower mold is separated from the upper mold, it can ensure that each paper dinner plate is stably located in each molding groove, and the paper dinner plate is located or falls into the lower mold as much as possible, so as to ensure the normal feeding of the paper dinner plate as much as possible.

[0011] Afterwards, the upper mold is driven by the transfer device of the paper tray forming machine to move to the unloading station. During this process, the connecting gear rotatably connected to the upper side of the upper mold is meshed with the connecting rack provided on the frame, so that the stability of the movement of the upper mold can be improved. In the process of rotation of the connecting gear, the connecting column is driven to automatically move upward, so that the reinforcing protrusions located on the connecting plate move upward, so that each reinforcing protrusion is disengaged from the corresponding paper tray, so that the paper tray automatically falls off, thereby realizing automatic unloading of the paper tray. In addition, with the cooperation of each reinforcing protrusion and each reinforcing groove, the reinforcing ribs at the bottom of the paper tray can be processed to improve the structural strength of the paper tray.

[0012] Preferably, the blanking assembly further comprises a plurality of guide posts, which are arranged on the upper side of the connecting plate and movably penetrate the upper mold in a vertical direction.

[0013] By adopting the above technical solution and providing a guide column to guide the sliding of the connecting plate, a sliding connection between the connecting plate and the upper mold is achieved.

[0014] Preferably, the blanking assembly further comprises a plurality of balls, which are rollingly connected to the guide column and abut against a side of the connecting rack away from the connecting gear.

[0015] By adopting the above technical solution, a plurality of balls are provided, and the balls abut against one side of the connecting gear, so as to facilitate the horizontal movement of the upper mold and the vertical movement of the connecting plate.

[0016] Preferably, the upper mold is provided with a sealing gasket at each of the clearance grooves, and the shape of the sealing gasket matches the shape of the reinforcing protrusion.

[0017] By adopting the above technical solution and arranging a sealing gasket, the sealing between the reinforcing protrusion and the recess is improved, and the pulp is prevented from penetrating into the upper mold as much as possible, while also ensuring the flatness of the bottom of the paper dinner plate.

[0018] Preferably, the molding die further comprises a blowing assembly, the blowing assembly comprises a blower, and the blower is arranged at the lower end of the connecting column.

[0019] By adopting the above technical solution and setting a hair dryer, air can be blown into the interior of the upper mold to blow the paper dinner plate out of the forming groove, thereby ensuring that the paper dinner plate can be separated from the forming groove, and the pulp and paper scraps between the reinforcing protrusion and the give-way groove can be blown out.

[0020] Preferably, a touch switch is provided at the lower end of the hair dryer, and an abutment block is provided in the lower side of the upper mold, and when the abutment block abuts against the touch switch, the hair dryer is in an off state.

[0021] By adopting the above technical solution and providing an abutment block, during the forming process of the paper plate, the abutment block abuts against the touch switch, so that the hair dryer is in an off state, and blowing the paper pulp to avoid uneven forming of the bottom of the paper plate.

[0022] Preferably, the blowing assembly further comprises an abutment column, wherein the abutment column is arranged on the upper side of the lower mold, and a through hole for the abutment column to pass through is opened on the lower side of the upper mold, and when the abutment column abuts against the touch switch, the hair dryer is in a closed state.

[0023] By adopting the above technical solution, by setting an abutment column, when the lower mold abuts against the upper mold, the abutment column passes through the through hole and abuts against the touch switch, so that the hair dryer is in an off state, and blowing the pulp to avoid uneven molding of the bottom of the paper plate.

[0024] Preferably, the blowing assembly also includes a mounting tube and a spring, the lower end of the mounting tube is threadedly connected to the lower mold, the abutment column is slidably connected to the mounting tube along the vertical direction, and the spring is arranged between the mounting tube and the lower end of the abutment column to drive the abutment column away from the mounting tube.

[0025] By adopting the above technical solution and setting up the mounting tube and the spring, when the abutment column abuts against the touch switch, the lower mold can continue to move upward under the action of the spring, avoiding interference between the upper mold and the lower mold as much as possible, so as to ensure that the lower mold fits tightly against the upper mold, and the mounting tube is threadedly connected to the lower mold, so as to adjust the position of the abutment column abutting against the touch switch, thereby adjusting the timing of turning off the hair dryer.

[0026] Preferably, the blowing assembly further comprises a pressure sensor, and the pressure sensor is arranged at the lower end of the abutting column.

[0027] By adopting the above technical solution and setting a pressure sensor, when the position between the upper mold and the lower mold does not match, the abutment column cannot be inserted into the through hole, so that the abutment column compresses the spring to make the pressure sensor abut against the installation tube, thereby prompting the staff that the installation position between the upper mold and the lower mold does not match.

[0028] In a second aspect, the present application provides a paper tray forming machine.

[0029] The paper tray forming machine provided in this application adopts the following technical solution:

[0030] A paper dinner plate forming machine comprises the forming mould described above.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. After the paper dinner plate is formed, the paper dinner plate can be tightly connected to the multiple reinforcement protrusions. Even if the lower mold is separated from the upper mold, it can ensure that each paper dinner plate is stably located in each forming groove, and the paper dinner plate is located or dropped into the lower mold as much as possible, thereby ensuring the normal feeding of the paper dinner plate;

[0033] 2. By rotating the connecting gear connected to the upper side of the upper mold to mesh with the connecting rack provided on the frame, the stability of the movement of the upper mold can be improved, and during the rotation of the connecting gear, the connecting column is driven to automatically move upward, so that each reinforcement protrusion located on the connecting plate moves upward, so that each reinforcement protrusion is separated from the corresponding paper dinner plate, so that the paper dinner plate automatically falls off, thereby realizing automatic unloading of the paper dinner plate. In addition, under the cooperation of each reinforcement protrusion and each reinforcement groove, the reinforcement ribs at the bottom of the paper dinner plate can be processed to improve the structural strength of the paper dinner plate;

[0034] 3. By setting a hair dryer, air can be blown into the interior of the upper mold to blow the paper dinner plate out of the forming groove, so as to ensure that the paper dinner plate can be separated from the forming groove, and the pulp and paper scraps between the reinforcing protrusion and the give way groove can be blown out. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is a schematic diagram of the cross-sectional structure of a paper dinner plate forming machine in the background art;

[0036] Figure 2 It is a schematic diagram of the overall structure of the molding die in the embodiment of the present application;

[0037] Figure 3 It is a schematic diagram of the overall structure of the upper mold in the embodiment of the present application;

[0038] Figure 4 It is an overall exploded schematic diagram of the forming mold in the embodiment of the present application;

[0039] Figure 5 is a partial cross-sectional schematic diagram of a molding die in an embodiment of the present application;

[0040] Figure 6 is a schematic diagram of the cross-sectional structure of the upper mold in the embodiment of the present application;

[0041] Figure 7 It is a partial exploded schematic diagram of the molding die in an embodiment of the present application.

[0042] Figure markings: 1. upper mold; 11. molding groove; 12. give way groove; 13. abutment block; 14. through hole; 2. lower mold; 21. molding protrusion; 22. reinforcement groove; 3. blanking assembly; 31. connecting plate; 32. reinforcement protrusion; 33. connecting column; 34. connecting gear; 35. connecting rack; 36. guide column; 37. ball; 38. sealing gasket; 4. blowing assembly; 41. blower; 42. abutment column; 43. mounting cylinder; 44. spring; 45. pressure sensor; 5. frame; 6. pulp barrel; 7. lifting device; 8. transfer device. DETAILED DESCRIPTION

[0043] The following is combined with Figure 2-7 This application is described in further detail.

[0044] The embodiment of the present application discloses a forming mold.

[0045] Reference Figure 2 and Figure 3 The molding mold includes an upper mold 1, a lower mold 2 and a blanking component 3. The lower side of the upper mold 1 is recessed to form a plurality of molding grooves 11, and the upper mold 1 is provided with a plurality of makeshift grooves 12 at each molding groove 11. The length direction of the plurality of makeshift grooves 12 is arranged along the length direction of the upper mold 1, and the plurality of makeshift grooves 12 are evenly spaced along the width direction of the upper mold 1.

[0046] Reference Figure 3 and Figure 4The lower mold 2 is located below the upper mold 1. The upper side of the lower mold 2 protrudes to form a plurality of molding protrusions 21. The plurality of molding protrusions 21 match the plurality of molding grooves 11, that is, the number of molding protrusions 21 is the same as the number of molding grooves 11, and a molding cavity for molding a paper dinner plate is formed between each molding protrusion 21 and each molding groove 11. At the same time, each molding protrusion 21 is provided with a plurality of reinforcing grooves 22. The plurality of reinforcing grooves 22 match the plurality of giving way grooves 12, that is, the position of each reinforcing groove 22 corresponds to the position of each giving way groove 12.

[0047] Reference Figure 3 , Figure 4 and Figure 5 The blanking assembly 3 includes a connecting plate 31, a plurality of reinforcing protrusions 32, a connecting column 33, a connecting gear 34 and a connecting rack 35. The upper mold 1 is hollow, the connecting plate 31 is slidably connected to the upper mold 1 in the vertical direction, and a plurality of reinforcing protrusions 32 are fixedly connected to the lower side of the connecting plate 31. The number of reinforcing protrusions 32 is the same as the number of the clearance grooves 12. Each reinforcing protrusion 32 is movably arranged in each clearance groove 12 and is used to be embedded in the reinforcing groove 22. Among them, the lower end of the reinforcing protrusion 32 is semicircular, and the shape of the reinforcing groove 22 is the same as that of the reinforcing protrusion 32, so that the reinforcing protrusion 32 and the reinforcing groove 22 cooperate to form the reinforcing ribs of the paper dinner plate.

[0048] The connecting column 33 is fixedly connected to the connecting plate 31 and the upper end thereof is passed through the upper mold 1. The lower end of the connecting gear 34 is rotatably connected to the upper side of the upper mold 1 through a bearing, and the connecting gear 34 is threadedly connected to the connecting column 33. The connecting rack 35 is horizontally fixedly connected to the frame 5 of the paper plate forming machine, and one side of the connecting rack 35 is meshed with the connecting gear 34.

[0049] In actual application, when the lower mold 2 moves upward to abut against the upper mold 1, each molding protrusion 21 is embedded in each molding groove 11, and each reinforcing protrusion 32 is penetrated through each clearance groove 12 and embedded in the reinforcing groove 22, so that a cavity for forming a paper dinner plate can be formed. After the paper dinner plate is formed, the paper dinner plate can be tightly connected to the multiple reinforcing protrusions 32. Even if the lower mold 2 is separated from the upper mold 1, it can ensure that each paper dinner plate is stably located in each molding groove 11, and the paper dinner plate is located or falls into the lower mold 2 as much as possible, thereby ensuring the normal feeding of the paper dinner plate as much as possible. Among them, under the cooperation of each reinforcing protrusion 32 and each reinforcing groove 22, the reinforcing ribs at the bottom of the paper dinner plate can be processed to improve the structural strength of the paper dinner plate.

[0050] During the unloading process of multiple paper trays, the upper mold 1 is driven by the transfer device 8 of the paper tray forming machine to move to the unloading station. The connecting gear 34 rotatably connected to the upper side of the upper mold 1 is meshed with the connecting rack 35 fixedly connected to the frame 5 of the paper tray forming machine to guide the movement of the upper mold 1, thereby improving the stability of the movement of the upper mold 1. At the same time, during the rotation of the connecting gear 34, the connecting gear 34 is threadedly connected to the connecting column 33, driving the connecting column 33 to automatically move upward, so as to drive the connecting plate 31 to automatically move upward, so that each reinforcement protrusion 32 located on the connecting plate 31 moves upward, so that each reinforcement protrusion 32 is automatically separated from the corresponding paper tray, so that multiple paper trays are automatically dropped, thereby realizing the automatic unloading of paper trays.

[0051] Reference Figure 4 and Figure 5 In some embodiments, the blanking assembly 3 also includes a plurality of guide columns 36. Taking four guide columns 36 as an example, the four guide columns 36 are distributed in a rectangular shape. The lower ends of the guide columns 36 are fixedly connected to the upper side of the connecting plate 31, and the upper side is movably penetrated in the upper mold 1 to guide the sliding of the connecting plate 31, thereby realizing the sliding connection between the connecting plate 31 and the upper mold 1.

[0052] In some embodiments, the blanking assembly 3 further includes a plurality of balls 37, the number of the balls 37 is two, the two balls 37 are respectively connected to two guide posts 36 in a rolling manner, and the two balls 37 are always in contact with the side of the connecting rack 35 away from the connecting gear 34. When the upper mold 1 moves horizontally and the connecting plate 31 moves vertically, each ball 37 can rotate, thereby facilitating the horizontal movement of the upper mold 1 and the vertical movement of the connecting plate 31.

[0053] Reference Figure 6 In some embodiments, a sealing gasket 38 is embedded in each of the easing grooves 12 of the upper mold 1. The shape of the sealing gasket 38 matches the shape of the reinforcing protrusion 32. When the reinforcing protrusion 32 is inserted into the easing groove 12, the sealing gasket 38 is tightly sleeved on the reinforcing protrusion 32 to improve the sealing between the reinforcing protrusion 32 and the easing groove 12, and to prevent pulp from penetrating into the upper mold 1 as much as possible, while also ensuring the flatness of the bottom of the paper dinner plate.

[0054] Reference Figure 5 and Figure 6In some embodiments, the forming mold further includes a blowing assembly 4, which includes a blower 41, which is cylindrical and fixedly connected to the lower end of the connecting column 33. When the lower mold 2 abuts against the upper mold 1, the blower 41 is in a closed state to avoid affecting the forming of the paper dinner plate as much as possible. When the upper mold 1 moves to the unloading station, the blower 41 is in an open state, and can blow air into the interior of the upper mold 1 to blow the paper dinner plate out of the forming groove 11, so as to ensure that the paper dinner plate can stably detach from the forming groove 11, and can blow out the pulp and paper scraps between the reinforcing protrusion 32 and the give-way groove 12.

[0055] In some embodiments, a touch switch (not shown in the figure) is provided at the lower end of the hair dryer 41. Correspondingly, an abutment block 13 is formed on the lower side of the upper mold 1. The abutment block 13 matches the hair dryer 41, that is, when the abutment block 13 abuts against the touch switch, the hair dryer 41 is in a closed state. During the forming process of the paper dinner plate, the hair dryer 41 is in a normally open state. When the connecting plate 31 moves downward so that each reinforcing protrusion passes through a clearance groove 12, the abutment block 13 abuts against the touch switch, so that the hair dryer 41 is in a closed state, so as to avoid blowing the paper pulp as much as possible to cause uneven forming of the bottom of the paper dinner plate.

[0056] Reference Figure 5 and Figure 7 In some embodiments, the blowing assembly 4 further includes an abutting column 42, which is mounted on the upper side of the lower mold 2, and a through hole 14 is provided on the lower side of the upper mold 1 for the abutting column 42 to pass through, and the abutting column 42 matches the blower 41, that is, when the abutting column 42 abuts against the touch switch, the blower 41 is in an off state. When the lower mold 2 abuts against the upper mold 1, the abutting column 42 passes through the through hole 14 and abuts against the touch switch, so that the blower 41 is in an off state, and the blowing of the pulp is avoided as much as possible, which causes the bottom of the paper plate to be unevenly formed. In other embodiments, the abutment block 13 and the abutment column 42 are provided at the same time, and the through hole 14 extends to the abutment block 13. At this time, the touch switch abuts against one of the abutment block 13 and the abutment column 42 or abuts against both the abutment block 13 and the abutment column 42 at the same time. Even if the abutment block 13 fails to abut against the touch switch, or the abutment column 42 fails to abut against the touch switch, it can be ensured that the hair dryer 41 is in the off state.

[0057] Reference Figure 7In some embodiments, the blowing assembly 4 further includes a mounting tube 43 and a spring 44, the lower end of the mounting tube 43 is threadedly connected to the lower mold 2, the abutting column 42 is slidably connected to the mounting tube 43 in the vertical direction, the upper end of the spring 44 is fixedly connected to the lower end of the abutting column 42, and the lower end of the spring 44 is fixedly connected to the mounting tube 43, so as to drive the abutting column 42 away from the mounting tube 43, that is, to drive the abutting column 42 to move upward. When the abutting column 42 abuts against the abutting switch, under the action of the spring 44, the lower mold 2 can continue to move upward, and the abutment between the upper mold 1 and the lower mold 2 is avoided as much as possible to prevent interference, so as to ensure that the lower mold 2 is closely attached to the upper mold 1, and the mounting tube 43 is threadedly connected to the lower mold 2, and the position of the abutting column 42 abutting against the touch switch can be adjusted, so as to adjust the timing of the hair dryer 41 to be turned off.

[0058] In some embodiments, the blowing assembly 4 further includes a pressure sensor 45, which is fixedly connected to the lower end of the abutment column 42, and the pressure sensor 45 is electrically connected to the controller of the paper tray forming machine. When the position between the upper mold 1 and the lower mold 2 does not match, the abutment column 42 cannot be inserted into the through hole 14, so that the abutment column 42 compresses the spring 44, so that the pressure sensor 45 abuts against the installation cylinder 43, and the pressure sensor 45 transmits a signal to the controller of the paper tray forming machine to stop the paper tray forming machine from working, so as to remind the staff that the installation position between the upper mold 1 and the lower mold 2 does not match.

[0059] The implementation principle of this embodiment is as follows: in actual application, when the lower mold 2 moves upward and abuts against the upper mold 1, each molding protrusion 21 is embedded in each molding groove 11, and at the same time, each reinforcement protrusion 32 is penetrated through each clearance groove 12 and embedded in the reinforcement groove 22, so that a cavity for forming a paper dinner plate can be formed. After the paper dinner plate is formed, the paper dinner plate can be tightly connected to the multiple reinforcement protrusions 32, and even if the lower mold 2 is separated from the upper mold 1, it can ensure that each paper dinner plate is stably located in each molding groove 11, and the paper dinner plate is located or falls into the lower mold 2 as much as possible, thereby ensuring the normal feeding of the paper dinner plate as much as possible. Among them, under the cooperation of each reinforcement protrusion 32 and each reinforcement groove 22, the reinforcement ribs at the bottom of the paper dinner plate can be processed to improve the structural strength of the paper dinner plate.

[0060] During the unloading process of multiple paper trays, the upper mold 1 is driven by the transfer device 8 of the paper tray forming machine to move to the unloading station. The connecting gear 34 rotatably connected to the upper side of the upper mold 1 is meshed with the connecting rack 35 fixedly connected to the frame 5 of the paper tray forming machine to guide the movement of the upper mold 1, thereby improving the stability of the movement of the upper mold 1. At the same time, during the rotation of the connecting gear 34, the connecting gear 34 is threadedly connected to the connecting column 33, driving the connecting column 33 to automatically move upward, so as to drive the connecting plate 31 to automatically move upward, so that each reinforcement protrusion 32 located on the connecting plate 31 moves upward, so that each reinforcement protrusion 32 is automatically separated from the corresponding paper tray, so that multiple paper trays are automatically dropped, thereby realizing the automatic unloading of paper trays.

[0061] The embodiment of the present application also discloses a paper tray forming machine.

[0062] The paper tray forming machine includes the forming mold described in the above embodiment.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A molding die, characterized in that: The invention comprises an upper die (1), a lower die (2) and a blanking assembly (3); the lower side of the upper die (1) is provided with a plurality of molding grooves (11), and the upper die (1) is provided with a plurality of spaced-apart grooves (12) at each of the molding grooves (11); the upper side of the lower die (2) is provided with a plurality of molding protrusions (21) matching the plurality of molding grooves (11), and each of the molding protrusions (21) is provided with a plurality of reinforcing grooves (22) matching the plurality of spaced-apart grooves (12); The blanking assembly (3) comprises a connecting plate (31), a plurality of reinforcing protrusions (32), a connecting column (33), a connecting gear (34) and a connecting rack (35); the connecting plate (31) is slidably connected to the upper mold (1) in the vertical direction; the plurality of reinforcing protrusions (32) are arranged on the lower side of the connecting plate (31), each reinforcing protrusion (32) is movably inserted into each of the giving way grooves (12) and is used to be embedded in each of the reinforcing grooves (22); the connecting column (33) is arranged on the connecting plate (31) and is inserted into the upper mold (1); the connecting gear (34) is rotatably connected to the upper side of the upper mold (1) and is threadedly connected to the connecting column (33); the connecting rack (35) is arranged on the frame (5) of the paper plate forming machine and one side is meshed with the connecting gear (34); The molding die further comprises an air blowing assembly (4), wherein the air blowing assembly (4) comprises a blower (41), and the blower (41) is arranged at the lower end of the connecting column (33); A touch switch is provided at the lower end of the hair dryer (41), and a contact block (13) is provided on the lower side of the upper mold (1); when the contact block (13) contacts the touch switch, the hair dryer (41) is in a closed state.

2. A molding die according to claim 1, characterized in that: The blanking assembly (3) further comprises a plurality of guide posts (36), wherein the plurality of guide posts (36) are arranged on the upper side of the connecting plate (31) and are movably arranged in the upper mold (1) along the vertical direction.

3. A molding die according to claim 2, characterized in that: The unloading assembly (3) further comprises a plurality of balls (37), wherein the balls (37) are rollingly connected to the guide column (36) and abut against a side of the connecting rack (35) away from the connecting gear (34).

4. A molding die according to claim 1, characterized in that: The upper mold (1) is provided with a sealing gasket (38) at each of the clearance grooves (12), and the shape of the sealing gasket (38) matches the shape of the reinforcing protrusion (32).

5. A molding die according to claim 1, characterized in that: The blowing assembly (4) further comprises an abutment column (42), wherein the abutment column (42) is arranged on the upper side of the lower mould (2), and a through hole (14) is provided on the lower side of the upper mould (1) for the abutment column (42) to pass through. When the abutment column (42) abuts against the touch switch, the hair dryer (41) is in a closed state.

6. A molding die according to claim 5, characterized in that: The blowing assembly (4) further comprises a mounting tube (43) and a spring (44); the lower end of the mounting tube (43) is threadedly connected to the lower mold (2); the abutment column (42) is slidably connected to the mounting tube (43) along a vertical direction; the spring (44) is arranged between the mounting tube (43) and the lower end of the abutment column (42) to drive the abutment column (42) away from the mounting tube (43).

7. A molding die according to claim 6, characterized in that: The blowing assembly (4) further comprises a pressure sensor (45), wherein the pressure sensor (45) is arranged at the lower end of the abutting column (42).

8. A paper tray forming machine, characterized in that: Comprising a molding die as described in any one of claims 1-7.

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