Foam packaging box production device

Abstract

The invention discloses a foam packaging box production device, and belongs to the technical field of foam plastic molding equipment, the foam packaging box production device comprises a support, and the support is provided with a foaming box and a transfer bin; the foaming box is horizontally and rotatably inserted into the side wall of the transfer bin, and the end, close to the transfer bin, of the foaming box is open; a mounting frame is horizontally and rotatably mounted in the foaming box, a first motor used for driving the mounting frame to rotate is arranged on the side wall of the side, away from the transfer bin, of the foaming box, and a filter screen is fixedly mounted on the mounting frame and used for screening foamed foam and unfoamed plastic particles; two threaded rods are horizontally, symmetrically and rotationally mounted on the inner side wall of the foaming box; according to the scheme, under the cooperation of the filter screen, the control mechanism and the push plate, foams which do not meet the size requirement can be removed, it is guaranteed that all foams entering the transfer bin are the foams with the qualified size, the probability of caking is reduced in the subsequent machining process, and the effect of improving the product quality is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of foam plastic molding equipment, and more particularly to a foam packaging box production device. Background Art

[0002] Foam packaging boxes usually refer to packaging containers made of polystyrene (EPS), polyurethane (PU) or other foam plastics. These materials are lightweight, highly elastic and have excellent cushioning properties, and are therefore widely used to protect fragile items and products during transportation. Foam packaging boxes not only provide good physical protection, but also have certain heat and sound insulation effects, making them an ideal choice for electronic products, home appliances, glass products and other products that require special protection.

[0003] During the foam box production process, plastic raw material pellets are first pre-foamed by steam heating, forming significantly expanded foam beads. These pre-foamed beads are then typically transported to a maturation bin for stabilization using airflow (pneumatic conveying). However, during this transport process, unfoamed raw material particles (raw material) can become entrained in the flowing foam beads due to density differences, static adsorption, or equipment residue / leakage, ultimately being carried into the maturation bin. This mixed raw material prevents proper foaming and sintering during the subsequent molding process, resulting in defects such as lumps and insufficient strength in the finished product, significantly increasing scrap rates and further wasting raw materials.

[0004] Therefore, a foam packaging box production device is proposed. Summary of the Invention

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a foam packaging box production device, which can reduce the scrap rate by reducing the amount of raw materials entering the transfer warehouse.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A foam packaging box production device comprises a bracket, on which a foaming box and a transfer bin are provided; The foaming box is horizontally rotatably inserted on the side wall of the transfer bin, and one end of the foaming box close to the transfer bin is open; A mounting frame is horizontally rotatably mounted in the foaming box, and a first motor for driving the mounting frame to rotate is provided on the side wall of the foaming box away from the transfer bin. A filter is fixedly mounted on the mounting frame, and the filter is used to separate the foam that has been foamed and the plastic particles that have not been foamed; Two threaded rods are symmetrically mounted on the inner side wall of the foaming box, and the two threaded rods are symmetrically distributed on both sides of the filter screen; A push plate is threadedly mounted on each of the threaded rods, a guide rod is horizontally slidably inserted on the side wall of each push plate, and the guide rod is fixedly connected to the inner side wall of the foaming box, and a driving mechanism for driving the threaded rod to rotate is provided on the bracket; The end surface of the mounting frame is provided with a control mechanism for controlling the communication between the foaming box and the transfer warehouse.

[0008] Furthermore, it also includes a magnetic coupling, wherein the magnetic coupling includes an outer rotor and an inner rotor; The driving mechanism includes a second motor fixedly mounted on the side wall of the bracket, the second motor is located above the filter, an outer rotor is fixedly mounted on the output end of the second motor, and an inner rotor is fixedly sleeved on the end of each threaded rod away from the transfer bin.

[0009] Furthermore, an elastic strip is fixedly installed between each of the threaded rods and the inner wall of the foaming box.

[0010] Furthermore, there are two groups of control mechanisms, which are symmetrically distributed on both sides of the filter; The control mechanism includes a socket opened on the side wall of the mounting frame close to the transfer bin, a rod is inserted into the socket for horizontal sliding, the rod and the socket are both polygonal, a semicircular blocking plate is fixedly installed on one end of the rod close to the transfer bin, and the blocking plate is used to separate the space formed by the side wall of the filter and the inner wall of the foaming box from the transfer bin.

[0011] Furthermore, a spring is installed between the insertion rod and the insertion hole. The blocking plate and the push plate are both made of magnetic materials, and the blocking plate and the push plate repel each other.

[0012] Furthermore, the distance between the push plate and the adjacent side of the filter screen is smaller than the radius of the holes on the surface of the filter screen, and the side wall of the push plate is an arc surface.

[0013] Furthermore, a bellows made of elastic material is fixedly installed on the side wall of the push plate close to the transfer bin, the bellows is sleeved on the threaded rod, and one end of the bellows close to the transfer bin is fixedly connected to the side wall of the threaded rod.

[0014] Furthermore, a cavity is provided on the push plate, air holes are evenly provided on the side wall of the cavity close to the bellows, and an air supply mechanism for supplying air to the cavity is provided on the bellows.

[0015] Furthermore, the air supply mechanism includes a pressurizing cavity provided on the side wall of the bellows, and a through hole communicating with the pressurizing cavity is provided on the side wall of the cavity.

[0016] Furthermore, a cavity is formed on the elastic strip, and a conduit extending into the cavity is inserted into the side wall of the cavity.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) With the cooperation of the filter, control mechanism and push plate, this solution can remove foam that does not meet the size requirements, ensuring that only foam of qualified size enters the transfer bin. In addition, the probability of agglomeration is reduced during subsequent processing, thereby improving product quality.

[0018] (2) This solution uses the mutual cooperation of the air holes, bellows and pressurized chamber. When the push plate pushes the foam to move, the bellows contracts, and the volume of the pressurized chamber decreases. Therefore, the gas in the pressurized chamber is discharged into the cavity through the through hole, and then discharged through the air holes. The gas discharged from the air holes impacts the foam, so that the foam is in a suspended state, reducing the friction between the foam and the filter, and ensuring the integrity of the foam.

[0019] (3) This solution makes the distance between the push plate and the adjacent side of the filter smaller than the radius of the holes on the filter surface. When the push plate moves up along the filter surface, when the foam that has not fully expanded is stuck in the holes, the push plate can apply a horizontal thrust to the arc surface of the foam surface. The thrust is decomposed along the arc surface, and under the action of the vertical component force, the foam stuck in the holes of the filter will be pushed downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle; Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure at B in the middle; Figure 5 For the present invention Figure 2 Schematic diagram of the enlarged structure at C in the middle; Figure 6 This is a schematic diagram of the combined structure of the foaming box, mounting frame, filter screen, plugging rod and blocking plate of the present invention; Figure 7 It is a schematic diagram of the combined structure of the mounting bracket and the socket of the present invention.

[0021] Description of the numbers in the figure: 1. Bracket; 2. Foaming box; 3. Transfer bin; 4. Mounting frame; 5. First motor; 6. Filter; 7. Threaded rod; 8. Push plate; 9. Guide rod; 10. Magnetic coupling; 101. Outer rotor; 102. Inner rotor; 11. Second motor; 12. Elastic strip; 13. Socket; 14. Insert rod; 15. Sealing plate; 16. Spring; 17. Bellows; 18. Cavity; 19. Air hole; 20. Pressurized chamber; 21. Through hole; 22. Cavity; 23. Catheter. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example 1:

[0023] See also Figures 1 to 7 , a foam packaging box production device, comprising a bracket 1, on which a foaming box 2 and a transfer bin 3 are provided; The foaming box 2 is horizontally rotated and inserted on the side wall of the transfer bin 3, and one end of the foaming box 2 close to the transfer bin 3 is open; A mounting frame 4 is horizontally rotatably mounted in the foaming box 2. A first motor 5 is provided on the side wall of the foaming box 2 away from the transfer bin 3 for driving the mounting frame 4 to rotate. A filter screen 6 is fixedly mounted on the mounting frame 4. The filter screen 6 is used to separate the foamed foam and the unfoamed plastic particles. The holes of the filter screen 6 are arranged vertically. Two threaded rods 7 are symmetrically mounted on the inner side wall of the foaming box 2 and are symmetrically distributed on both sides of the filter screen 6. A push plate 8 is threadedly mounted on each threaded rod 7, and a guide rod 9 is inserted horizontally and slidably on the side wall of each push plate 8. The guide rod 9 is fixedly connected to the inner wall of the foaming box 2. The push plate 8 is restricted from rotating by the guide rod 9 so that the push plate 8 moves only along the threaded rod 7. A driving mechanism for driving the threaded rod 7 to rotate is provided on the bracket 1; The end surface of the mounting frame 4 is provided with a control mechanism for controlling the communication between the foaming box 2 and the transfer bin 3; Among them, the power output end of the first motor 5 is fixedly connected to the rotating shaft of the mounting frame 4, so that the mounting frame 4 can be driven to rotate by the first motor 5, and the first motor 5 is a stepping motor. The stepping motor can control the speed and rotation frequency through a program, which is a prior art and will not be described in detail. Among them, an electric heating wire is embedded on the inner bottom wall of the foaming box 2, and the plastic particles loaded into the foaming box 2 are heated by the electric heating wire to make the plastic particles foam to form foam.

[0024] First, under the action of the control mechanism, the foaming box 2 is separated from the transfer warehouse 3, and the foaming box 2 is filled with plastic raw materials.

[0025] Then, the heating wire is energized, and the heat generated by the heating wire heats the plastic particles in the foaming box 2, so that the plastic particles expand due to the heat to form foam.

[0026] When foam of a qualified volume begins to form in the foaming box 2, the first motor 5 is started, and the mounting bracket 4 is driven by the first motor 5 to rotate intermittently, and the mounting bracket 4 rotates 180 degrees each time.

[0027] As mounting frame 4 rotates, the plastic material (including both unfoamed material and foam) beneath filter screen 6 in foaming box 2 is pushed by filter screen 6. During this process, plastic material particles smaller than the pore size of filter screen 6 and incompletely foamed foam particles pass through the pores of filter screen 6. Only foam particles that meet the specified particle size are continuously pushed by filter screen 6. When mounting frame 4 returns filter screen 6 to a horizontal position, the foam particles that meet the required size eventually accumulate on the top surface of filter screen 6.

[0028] When the filter 6 is in a horizontal state and the foam that meets the size requirements gathers on the top surface of the filter 6, the first motor 5 stops working. At this time, under the action of the driving mechanism, the threaded rod 7 drives the push plate 8 to move along the surface of the filter 6. At this time, the foam that meets the size requirements on the surface of the filter 6 is pushed by the push plate 8. When the push plate 8 approaches the transfer bin 3, the control mechanism controls the space above the filter 6 in the foaming box 2 to be connected with the transfer bin 3. Therefore, as the push plate 8 approaches the transfer bin 3, the foam that meets the size requirements on the surface of the filter 6 will fall into the transfer bin 3.

[0029] Therefore, with the cooperation of the filter 6, the control mechanism and the push plate 8, the foam that does not meet the size requirements can be removed to ensure that the foam entering the transfer bin 3 is of qualified size, thereby reducing the probability of agglomeration during subsequent processing and improving product quality.

[0030] like Figure 5 As shown, it also includes a magnetic coupling 10, which includes an outer rotor 101 and an inner rotor 102; The drive mechanism includes a second motor 11 fixedly mounted on the side wall of the bracket 1. The second motor 11 is located above the filter 6. An outer rotor 101 is fixedly mounted on the output end of the second motor 11. An inner rotor 102 is fixedly sleeved on the end of each threaded rod 7 away from the transfer bin 3. When the first motor 5 drives the mounting bracket 4 to rotate, the two inner rotors 102 intermittently approach the outer rotor 101. When the inner rotor 102 and the outer rotor 101 are on the same horizontal line, the outer rotor 101 drives the inner rotor 102 to rotate through magnetic field coupling, thereby driving the threaded rod 7 to rotate. Among them, the magnetic coupling 10 is an existing technology. The outer rotor 101 of the magnetic coupling 10 is connected to a power source (such as a motor). The outer rotor 101 contains permanent magnets or electromagnets and is responsible for transmitting rotational power; the inner rotor 102 is connected to the load equipment and passively rotates through magnetic field coupling to achieve contactless torque transmission, which will not be repeated.

[0031] like Figure 5 As shown, an elastic strip 12 is fixedly installed between each threaded rod 7 and the inner wall of the foaming box 2. When the inner rotor 102 drives the threaded rod 7 to rotate, the elastic strip 12 is stretched and wound around the surface of the threaded rod 7; when the inner rotor 102 is misaligned with the outer rotor 101, the magnetic force exerted on the inner rotor 102 is reduced. At this time, the elastic strip 12 recovers and drives the threaded rod 7 to reverse, so that during the flipping process of the mounting frame 4, the push plate 8 can be moved to the end of the threaded rod 7 away from the transfer bin 3, in preparation for scraping the foam on the surface of the filter screen 6 again.

[0032] like Figure 3 As shown, there are two groups of control mechanisms, which are symmetrically distributed on both sides of the filter 6; The control mechanism includes a socket 13 provided on the side wall of the mounting frame 4 close to the transfer bin 3, and a rod 14 is inserted into the socket 13 for horizontal sliding. The rod 14 and the socket 13 are both polygonal, so that the rod 14 can be prevented from rotating in the socket 13. A semicircular blocking plate 15 is fixedly installed at one end of the rod 14 close to the transfer bin 3. The blocking plate 15 is used to separate the space formed by the side wall of the filter 6 and the inner wall of the foaming box 2 from the transfer bin 3.

[0033] like Figure 3 As shown, a spring 16 is installed between the insertion rod 14 and the socket 13. When the blocking plate 15 is not subjected to external force, under the action of the spring 16, the insertion rod 14 is located in the socket 13, and the side wall of the blocking plate 15 is in contact with the side wall of the mounting frame 4 and the side wall of the foaming box 2. The blocking plate 15 and the push plate 8 are both made of magnetic material, and the blocking plate 15 and the push plate 8 repel each other.

[0034] For the sealing plate 15 located in the space above the filter 6: when the push plate 8 moves away from the sealing plate 15, the repulsive force between the push plate 8 and the sealing plate 15 is less than the elastic force of the spring 16. At this time, under the action of the spring 16, the sealing plate 15 seals the end face of the foaming box 2.

[0035] As the distance between the push plate 8 and the blocking plate 15 gradually decreases, the repulsive force on the blocking plate 15 gradually increases. At this time, the insertion rod 14 moves outward along the insertion hole 13, and the blocking plate 15 breaks away from contact with the side wall of the foaming box 2. Therefore, the foam pushed by the push plate 8 will fall into the transfer bin 3.

[0036] After the foam on the surface of the filter 6 is pushed into the transfer bin 3, the first motor 5 drives the mounting frame 4 to rotate at an instant, the inner rotor 102 and the outer rotor 101 are misaligned, the elastic strip 12 is restored, and the push plate 8 moves away from the blocking plate 15. At this time, the spring 16 drives the blocking plate 15 to reset through the insertion rod 14, thereby preventing foam of unqualified size from leaking into the transfer bin 3.

[0037] like Figure 2 As shown, the distance between the push plate 8 and the adjacent side of the filter screen 6 is smaller than the radius of the holes on the surface of the filter screen 6, and the side wall of the push plate 8 is an arc surface. In the process of the push plate 8 moving up along the surface of the filter screen 6, when the foam that has not completed its expansion is stuck in the hole, the push plate 8 can apply a horizontal thrust to the arc surface of the foam surface. The thrust is decomposed along the arc surface. Under the action of the vertical component force, the foam stuck in the holes of the filter screen 6 will be pushed downward.

[0038] Therefore, when the push plate 8 applies a thrust to the foam stuck in the hole, it can prevent the push plate 8 from directly squeezing and crushing the foam stuck in the hole, thereby ensuring that the foam stuck in the hole can be pushed out of the hole.

[0039] like Figure 4 As shown, a bellows 17 made of elastic material is fixedly installed on the side wall of the push plate 8 close to the transfer bin 3. The bellows 17 is sleeved on the threaded rod 7, and one end of the bellows 17 close to the transfer bin 3 is fixedly connected to the side wall of the threaded rod 7. When the push plate 8 pushes the foam to move on the surface of the filter 6, the bellows 17 is sleeved on the threaded rod 7 to effectively isolate the foam from direct contact with the threaded rod 7, avoiding friction between the foam and the threaded structure of the threaded rod 7, thereby preventing the foam from breaking due to mechanical wear and ensuring the integrity of the foam.

[0040] like Figure 4 As shown, a cavity 18 is formed on the push plate 8 , air holes 19 are evenly formed on the side wall of the cavity 18 close to the bellows 17 , and an air supply mechanism for supplying air to the cavity 18 is provided on the bellows 17 .

[0041] The air supply mechanism includes a pressurizing chamber 20 formed on the side wall of the bellows 17 , and a through hole 21 communicating with the pressurizing chamber 20 is formed on the side wall of the cavity 18 .

[0042] When the push plate 8 pushes the foam to move, the bellows 17 contracts. At this time, the volume of the pressurized chamber 20 is reduced. Therefore, the gas in the pressurized chamber 20 is discharged into the cavity 18 through the through hole 21, and then discharged through the air hole 19. The gas discharged from the air hole 19 impacts the foam, so that the foam is in a suspended state, reducing the friction between the foam and the filter 6, and ensuring the integrity of the foam.

[0043] like Figure 5As shown, a cavity 22 is provided on the elastic strip 12, and a conduit 23 extending into the cavity 18 is inserted on the side wall of the cavity 22; when the threaded rod 7 rotates and the elastic strip 12 is wound on the threaded rod 7, the volume of the cavity 22 gradually decreases. At this time, the gas discharged from the cavity 22 flows into the cavity 18 along the conduit 23, thereby increasing the impact force of the gas discharged from the cavity 18, improving the impact effect on the foam on the surface of the filter 6, reducing the friction between the bottom foam and the filter 6, and improving the protection effect on the foam.

[0044] Usage method: First, under the action of the control mechanism, the foaming box 2 is separated from the transfer warehouse 3, and the foaming box 2 is filled with plastic raw materials.

[0045] Then, the heating wire is energized, and the heat generated by the heating wire heats the plastic particles in the foaming box 2, so that the plastic particles expand due to the heat to form foam.

[0046] When foam of a qualified volume begins to form in the foaming box 2, the first motor 5 is started, and the mounting bracket 4 is driven by the first motor 5 to rotate intermittently, and the mounting bracket 4 rotates 180 degrees each time.

[0047] As mounting frame 4 rotates, the plastic material (including both unfoamed material and foam) beneath filter screen 6 in foaming box 2 is pushed by filter screen 6. During this process, plastic material particles smaller than the pore size of filter screen 6 and incompletely foamed foam particles pass through the pores of filter screen 6. Only foam particles that meet the specified particle size are continuously pushed by filter screen 6. When mounting frame 4 returns filter screen 6 to a horizontal position, the foam particles that meet the required size eventually accumulate on the top surface of filter screen 6.

[0048] When the filter 6 is in a horizontal state and the foam that meets the size requirements gathers on the top surface of the filter 6, the first motor 5 stops working. At this time, under the action of the driving mechanism, the threaded rod 7 drives the push plate 8 to move along the surface of the filter 6. At this time, the foam that meets the size requirements on the surface of the filter 6 is pushed by the push plate 8. When the push plate 8 approaches the transfer bin 3, the control mechanism controls the space above the filter 6 in the foaming box 2 to be connected with the transfer bin 3. Therefore, as the push plate 8 approaches the transfer bin 3, the foam that meets the size requirements on the surface of the filter 6 will fall into the transfer bin 3.

[0049] When the inner rotor 102 drives the threaded rod 7 to rotate, the elastic strip 12 is stretched and wrapped around the surface of the threaded rod 7. When the inner rotor 102 is misaligned with the outer rotor 101, the magnetic force on the inner rotor 102 decreases, at which point the elastic strip 12 recovers and drives the threaded rod 7 to reverse, thereby enabling the push plate 8 to move to the end of the threaded rod 7 away from the transfer bin 3 during the flipping process of the mounting bracket 4, in preparation for scraping the foam off the surface of the filter screen 6 again. Regarding the blocking plate 15 located in the space above the filter screen 6: when the push plate 8 is away from the blocking plate 15, the repulsive force between the push plate 8 and the blocking plate 15 is less than the elastic force of the spring 16. At this point, under the action of the spring 16, the blocking plate 15 blocks the end face of the foaming box 2.

[0050] As the distance between the push plate 8 and the blocking plate 15 gradually decreases, the repulsive force on the blocking plate 15 gradually increases. At this time, the insertion rod 14 moves outward along the insertion hole 13, and the blocking plate 15 breaks away from contact with the side wall of the foaming box 2. Therefore, the foam pushed by the push plate 8 will fall into the transfer bin 3.

[0051] After the foam on the surface of the filter 6 is pushed into the transfer bin 3, the first motor 5 drives the mounting frame 4 to rotate at an instant, the inner rotor 102 and the outer rotor 101 are misaligned, the elastic strip 12 is restored, and the push plate 8 moves away from the blocking plate 15. At this time, the spring 16 drives the blocking plate 15 to reset through the insertion rod 14, thereby preventing foam of unqualified size from leaking into the transfer bin 3.

[0052] When the push plate 8 pushes the foam to move, the bellows 17 contracts. At this time, the volume of the pressurized chamber 20 is reduced. Therefore, the gas in the pressurized chamber 20 is discharged into the cavity 18 through the through hole 21, and then discharged through the air hole 19. The gas discharged from the air hole 19 impacts the foam, so that the foam is in a suspended state, reducing the friction between the foam and the filter 6, and ensuring the integrity of the foam.

[0053] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A foam packaging box production device, comprising a bracket (1), wherein a foaming box (2) and a transfer bin (3) are provided on the bracket (1); Its characteristics are: The foaming box (2) is horizontally rotatably inserted on the side wall of the transfer bin (3), and one end of the foaming box (2) close to the transfer bin (3) is open; A mounting frame (4) is horizontally rotatably mounted in the foaming box (2); a first motor (5) for driving the mounting frame (4) to rotate is provided on the side wall of the foaming box (2) away from the transfer bin (3); a filter (6) is fixedly mounted on the mounting frame (4); the filter (6) is used to separate foam that has been foamed and plastic particles that have not been foamed; Two threaded rods (7) are horizontally and symmetrically mounted on the inner side wall of the foaming box (2), and the two threaded rods (7) are symmetrically distributed on both sides of the filter screen (6); A push plate (8) is threadedly mounted on each of the threaded rods (7), a guide rod (9) is horizontally slidably inserted on the side wall of each of the push plates (8), and the guide rod (9) is fixedly connected to the inner side wall of the foaming box (2), and a driving mechanism for driving the threaded rod (7) to rotate is provided on the bracket (1); Furthermore, a control mechanism for controlling the communication between the foaming box (2) and the transfer bin (3) is provided on the end surface of the mounting frame (4).

2. The foam packaging box production device according to claim 1, characterized in that: Also included is a magnetic coupling (10), wherein the magnetic coupling (10) includes an outer rotor (101) and an inner rotor (102); The driving mechanism comprises a second motor (11) fixedly mounted on a side wall of the bracket (1), the second motor (11) being located above the filter screen (6), an outer rotor (101) being fixedly mounted on an output end of the second motor (11), and an inner rotor (102) being fixedly sleeved on one end of each threaded rod (7) away from the transfer bin (3).

3. The foam packaging box production device according to claim 2, characterized in that: An elastic strip (12) is fixedly installed between each threaded rod (7) and the inner wall of the foaming box (2).

4. The foam packaging box production device according to claim 3, characterized in that: There are two groups of control mechanisms, and the two groups of control mechanisms are symmetrically distributed on both sides of the filter (6); The control mechanism comprises a socket (13) provided on a side wall of the mounting frame (4) close to the transfer bin (3); a rod (14) is horizontally slidably inserted in the socket (13); the rod (14) and the socket (13) are both polygonal; a semicircular blocking plate (15) is fixedly mounted on one end of the rod (14) close to the transfer bin (3); the blocking plate (15) is used to separate the space formed by the side wall of the filter screen (6) and the inner wall of the foaming box (2) from the transfer bin (3).

5. The foam packaging box production device according to claim 4, characterized in that: A spring (16) is installed between the insertion rod (14) and the insertion hole (13). The blocking plate (15) and the push plate (8) are both made of magnetic materials, and the blocking plate (15) and the push plate (8) repel each other.

6. The foam packaging box production device according to claim 5, characterized in that: The distance between the push plate (8) and the adjacent side of the filter screen (6) is smaller than the radius of the holes on the surface of the filter screen (6), and the side wall of the push plate (8) is an arc surface.

7. The foam packaging box production device according to claim 6, characterized in that: A bellows (17) made of elastic material is fixedly installed on the side wall of the push plate (8) close to the transfer bin (3). The bellows (17) is sleeved on the threaded rod (7), and one end of the bellows (17) close to the transfer bin (3) is fixedly connected to the side wall of the threaded rod (7).

8. The foam packaging box production device according to claim 7, characterized in that: A cavity (18) is provided on the push plate (8), air holes (19) are evenly provided on the side wall of the cavity (18) close to the bellows (17), and an air supply mechanism for supplying air to the cavity (18) is provided on the bellows (17).

9. The foam packaging box production device according to claim 8, characterized in that: The air supply mechanism comprises a pressurizing chamber (20) provided on the side wall of the bellows (17), and a through hole (21) communicating with the pressurizing chamber (20) is provided on the side wall of the cavity (18).

10. The foam packaging box production device according to claim 9, characterized in that: A cavity (22) is provided on the elastic strip (12), and a conduit (23) extending into the cavity (18) is inserted into the side wall of the cavity (22).

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