Manufacturing process of full-smooth-surface rounded-corner cuboid paper-plastic product

Abstract

The invention provides a full-smooth-surface rounded-corner cuboid paper-plastic product manufacturing process, and relates to the technical field of paper pulp molding, and the full-smooth-surface rounded-corner cuboid paper-plastic product manufacturing process comprises the following steps: S1, mixing paper pulp raw materials through a cutting and mixing mechanism, and inputting paper pulp into a mold; s2, the paper pulp is formed into the shapes of an upper supporting piece, an inner supporting piece and a lower supporting piece in a mold; s3, rotary cutting is conducted on the upper supporting piece, the inner supporting piece and the lower supporting piece; s4, dispensing is conducted on the lower supporting piece, and then the inner supporting piece and the lower supporting piece are bonded; s5, the upper supporting piece, the inner supporting piece and the lower supporting piece are bonded to form a stable combination, the upper supporting piece makes direct contact with the lower supporting piece, no exposed connecting structure exists, traditional mechanical connection is replaced with dispensing bonding, and damage of mechanical connection to the integrity of the paper-plastic product is effectively avoided; a'cutting and mixing mechanism 'is adopted, multi-equipment step-by-step operation of'crushing-transferring-mixing' in traditional paper pulp preparation is integrated, time and manpower consumption in the raw material transferring link is reduced, and the paper pulp preparation period is shortened.

Description

Technical Field

[0001] This invention relates to the field of pulp molding technology, specifically to a manufacturing process for a fully smooth, rounded-corner rectangular paper-plastic product. Background Technology

[0002] Pulp molding products are three-dimensional paper products made from waste paper pulp, renewable straw fiber, and other raw materials through processes such as pulping, molding, and drying. Broadly speaking, they encompass various types of packaging and daily necessities; narrowly defined, they often refer to cushioning packaging and disposable items shaped using molds. Essentially, they represent a three-dimensional extension of traditional papermaking technology. Their environmental advantages extend throughout their entire life cycle. Raw materials are mostly derived from recycled waste paper or agricultural waste, making them widely available and biodegradable. The production process generates virtually no wastewater, meeting clean production standards.

[0003] To balance functionality and aesthetics, pulp molding packaging kits often require the assembly of multiple components. However, traditional mechanical connection methods can easily compromise the product's integrity and significantly impact its appearance. Furthermore, the pulp preparation process is quite complex. Plant fiber raw materials must first be processed in a crushing device, then transferred to a mixing device where appropriate amounts of water, neutralizing agents, and other additives are added and stirred until a pulp meeting the process requirements is formed before proceeding to subsequent molding steps. Summary of the Invention

[0004] This invention provides a manufacturing process for a fully smooth, rounded-corner rectangular paper-plastic product to solve at least one of the problems mentioned in the background art.

[0005] To address the aforementioned technical problems, this invention discloses a manufacturing process for a fully smooth, rounded-corner rectangular paper-plastic product, comprising the following steps: S1: After the pulp raw materials are mixed by the cutting and mixing mechanism, the pulp is fed into the mold; S2: The pulp is shaped into the form of an upper support, an inner support, and a lower support in a mold; S3: Perform rotary cutting on the upper support, inner support, and lower support; S4: Apply adhesive to the lower support component, and then bond the inner support component to the lower support component; S5: Apply adhesive to the upper support to bond it to the inner support, while simultaneously bringing the upper support into contact with the lower support.

[0006] Preferably, the upper support is provided with a groove, and the inner support includes symmetrically arranged arc-shaped parts. An inverted U-shaped part is fixedly provided on one side of the two arc-shaped parts that are close to each other. In step S4, the arc-shaped part is bonded to the lower support, and the horizontal height of the arc-shaped part is higher than the horizontal height of the lower support. In step S5, the upper end of the inverted U-shaped part is bonded to the lower surface of the groove, and the inner side of the lower end of the upper support is bonded to the arc-shaped part.

[0007] Preferably, in step S1, the cutting and mixing mechanism includes a cutting box, a plurality of support rods are fixedly provided at the lower end of the cutting box, an inlet pipe is provided on the cutting box, and an outlet pipe is provided at the lower end of the cutting box; a liquid storage tank is also installed on the cutting box.

[0008] Preferably, the cutting box is equipped with a power box, a drive motor is fixedly installed on one side wall of the power box, a U-shaped rod is fixedly connected to the output end of the drive motor, a rotating rod is fixedly connected to the other end of the U-shaped rod, the rotating rod extends out of the power box, a bevel gear one is fixedly connected to the other end of the rotating rod, a bevel gear two is meshed on the bevel gear one, a rotating rod is fixedly installed in the center of the bevel gear two, the rotating rod extends into the cutting box, and a cutting blade is installed on the rotating rod.

[0009] Preferably, guide rails are symmetrically arranged on the rotating rod, and a suspension block is slidably arranged on the guide rail. A cutting blade is hinged to the suspension block, and a rotating tube is hinged to the lower end of each cutting blade. A connecting block is hinged to the other end of the rotating tube and is fixedly arranged on the rotating rod.

[0010] Preferably, a through groove is provided on the rotating tube, a sliding block is slidably sleeved on the rotating tube, and several cylinders are installed through the sliding block. The cylinders are positioned opposite to the through groove and are provided with cutting blades. A connecting rod is hinged to the sliding block, and the other end of the connecting rod is hinged to the lower surface of the cutting blade.

[0011] Preferably, the rotating rod has a cavity, an inlet pipe and an outlet pipe are installed through the cavity, a connecting pipe is connected through the inlet pipe and the connecting pipe is connected through the rotating rod, a one-way valve is installed in both the inlet pipe and the outlet pipe, a piston plate is installed in the cavity, a moving rod is fixedly installed at the upper end of the piston plate, the moving rod slides upward to extend the rotating rod, and a moving block is fixedly installed at the upper end of the moving rod; A square frame is installed on the U-shaped rod. The square frame is slidably connected to the inner wall of the power box. An L-shaped rod is fixedly installed at the upper end of the square frame. The L-shaped rod extends slidably out of the power box. The other end of the L-shaped rod is fixedly connected to a moving block.

[0012] Preferably, a sleeve is slidably fitted on the guide rail, and a spring is fixedly installed at the upper end of the sleeve. The other end of the spring is rotatably connected to the upper surface of the cutting box. Several stabilizing rods are fixedly connected to the sleeve, and an annular frame is fixedly installed at the other end of each stabilizing rod. Several through holes are provided in the annular frame. A pipeline is connected through the liquid storage tank, and a liquid outlet pipe is installed on the pipeline. The liquid outlet pipe is positioned opposite to the annular frame.

[0013] Preferably, a fixing plate is fixedly installed on the liquid outlet pipe, and a second spring is fixedly installed on the fixing plate. The other end of the second spring is fixedly connected to the pipeline. A square through groove is opened on the liquid outlet pipe, and the liquid outlet pipe is slidably connected to the pipeline.

[0014] Preferably, an extension rod is fixedly mounted on the fixed plate, and an arc-shaped trapezoidal plate is mounted on the annular frame, with the arc-shaped trapezoidal plate cooperating with the extension rod.

[0015] Compared with existing technologies, this invention provides a manufacturing process for a fully smooth, rounded-corner rectangular paper-plastic product, which has the following advantages: A stable assembly is formed by bonding the upper support, inner support, and lower support together, with the upper and lower support in direct contact and no exposed connecting structures. "Dip bonding" replaces traditional mechanical connections, effectively avoiding the damage to the integrity of the paper-plastic product caused by mechanical connections. Furthermore, the "cutting and mixing mechanism" integrates the multi-equipment step-by-step operation of "crushing-transferring-mixing" in traditional pulp preparation, reducing the time and manpower consumption in the raw material transfer process and shortening the pulp preparation cycle. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram showing the connection between the upper support, inner support, and lower support of the present invention; Figure 2 For the present invention Figure 1 A cross-sectional schematic diagram; Figure 3 This is a schematic diagram of the cutting and mixing mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of part of the structure; Figure 5 This is a schematic diagram of the internal structure of the cutting box of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of part of the structure; Figure 7 This is a top view of the rotating tube of the present invention; Figure 8 This is a schematic diagram of the installation of the piston plate of the present invention; Figure 9 This is a top view of the annular frame of the present invention; Figure 10 This is a schematic diagram of the installation of the liquid outlet pipe of the present invention; Figure 11 This is a schematic diagram illustrating the cooperation between the arc-shaped trapezoidal plate and the extending rod of the present invention.

[0017] In the diagram: 1. Upper support; 2. Lower support; 3. Groove; 4. Arc-shaped part; 5. Inverted U-shaped part; 6. Cutting box; 7. Slurry outlet pipe; 8. Support rod; 9. Slurry inlet pipe; 10. Drive motor; 11. Power box; 12. Storage tank; 13. Rotating rod; 14. Bevel gear one; 15. Rotating rod; 16. Bevel gear two; 17. Moving rod; 18. Moving block; 19. L-shaped rod; 20. U-shaped rod; 21. Annular frame; 22. Pipeline; 23. Cutting blade; 24. 1. Guide rail; 25. Spring 1; 26. Suspension block; 27. Connecting rod; 28. Through groove; 29. ​​Connecting block; 30. Inlet pipe; 31. Connecting pipe; 32. Sliding block; 33. Rotating pipe; 34. Outlet pipe; 35. Cutting blade; 36. Cavity; 37. Piston plate; 38. Sleeve; 39. Stabilizing rod; 40. Arc-shaped trapezoidal plate; 41. Outlet pipe; 42. Fixing plate; 43. Square through groove; 44. Spring 2; 45. Extending rod; 46. Square frame. Detailed Implementation

[0018] 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.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1: This embodiment of the invention provides a manufacturing process for a fully smooth, rounded-corner rectangular paper-plastic product. In this application, pulp raw materials specifically refer to plant fiber raw materials, such as sugarcane pulp, bamboo pulp, etc. Figures 1-11 As shown, it includes the following steps: S1: After the pulp raw materials are mixed by the cutting and mixing mechanism, the pulp is fed into the mold; S2: The pulp is shaped into the form of the upper support 1, the inner support and the lower support 2 in the mold; S3: Perform rotary cutting on the upper support 1, the inner support and the lower support 2; S4: Apply adhesive to the lower support 2, and then bond the inner support to the lower support 2; S5: Apply adhesive to the upper support 1 to bond the upper support 1 to the inner support, while the upper support 1 comes into contact with the lower support 2.

[0022] The working principle and beneficial effects of the above technical solution are as follows: After the pulp raw materials are mixed by the cutting and mixing mechanism, the pulp is fed into the mold. The pulp is formed in the mold into the shape of the upper support 1, the inner support and the lower support 2. The upper support 1, the inner support and the lower support 2 are rotary cut. The lower support 2 is glued. Then the inner support and the lower support 2 are bonded together. The upper support 1 is glued. The upper support 1 and the inner support are bonded together. At the same time, the upper support 1 and the lower support 2 are in contact.

[0023] The upper support 1, inner support 1, and lower support 2 are bonded together to form a stable combination. The upper support 1 and lower support 2 are in direct contact with each other and there is no exposed connection structure. The "dispensing bonding" replaces the traditional mechanical connection, which effectively avoids the damage to the integrity of the paper-plastic product caused by the mechanical connection. The "cutting and mixing mechanism" integrates the multi-equipment step-by-step operation of "crushing-transferring-mixing" in the traditional pulp preparation, reduces the time and manpower consumption of the raw material transfer link, and shortens the pulp preparation cycle.

[0024] Example 2: Based on Example 1 above, as follows Figures 1-2 As shown, the upper support 1 is provided with a groove 3, and the inner support includes symmetrically arranged arc-shaped parts 4. An inverted U-shaped part 5 is fixedly provided on one side of the two arc-shaped parts 4 that are close to each other. In step S4, the arc-shaped part 4 is bonded to the lower support 2, and the horizontal height of the arc-shaped part 4 is higher than the horizontal height of the lower support 2. In step S5, the upper end of the inverted U-shaped part 5 is bonded to the lower surface of the groove 3, and the inner side of the lower end of the upper support 1 is bonded to the arc-shaped part 4.

[0025] The horizontal height of the arc-shaped part 4 is higher than that of the lower support 2, which is used to adapt to the installation space of the upper support 1.

[0026] The working principle and beneficial effects of the above technical solution are as follows: the groove 3 of the upper support 1 and the inverted U-shaped part 5 of the inner support 1 are matched in shape, and the lower support 2 and the arc-shaped part 4 of the inner support 1 are matched in height difference. Through the dual structural correspondence of "groove 3-inverted U-shaped part 5" and "arc-shaped part 4-lower support 2", a precise positioning reference is provided for bonding, and component offset is avoided during assembly. The height difference between the arc-shaped part 4 and the lower support 2 provides space for bonding between the inner support and the upper support 1, thus completing the upper layer bonding between the inner support and the upper support 1. Through the double bonding between the inverted U-shaped part 5 and the groove 3, and the arc-shaped part 4 and the inner side of the lower end of the upper support 1, a stable three-layer connection structure of "lower-inner-upper" is formed; and there are no exposed bonding marks, avoiding problems such as appearance protrusions and gaps caused by traditional mechanical connections or single bonding.

[0027] Example 3: Based on Examples 1-2 above, as follows Figure 3 , Figures 5-6 As shown, the cutting and mixing mechanism includes a cutting box 6, with several support rods 8 fixedly installed at the lower end of the cutting box 6, an inlet pipe 9 on the cutting box 6, and an outlet pipe 7 at the lower end of the cutting box 6; a liquid storage tank 12 is also installed on the cutting box 6.

[0028] Preferably, the cutting box 6 is equipped with a power box 11, a drive motor 10 is fixedly installed on one side wall of the power box 11, a U-shaped rod 20 is fixedly connected to the output end of the drive motor 10, a rotating rod 13 is fixedly connected to the other end of the U-shaped rod 20, the rotating rod 13 extends out of the power box 11, a bevel gear 14 is fixedly connected to the other end of the rotating rod 13, a bevel gear 16 is meshed on the bevel gear 14, a rotating rod 15 is fixedly installed in the center of the bevel gear 16, the rotating rod 15 extends into the cutting box 6, and a cutting blade 23 is installed on the rotating rod 15.

[0029] The working principle and beneficial effects of the above technical solution are as follows: when the drive motor 10 starts, its output end drives the U-shaped rod 20 to rotate, and the U-shaped rod 20 drives the rotating rod 13 to rotate; the rotating rod 13 drives the bevel gear 14 and the bevel gear 2 16 to rotate, and the bevel gear 2 16 drives the rotating rod 15 to rotate inside the cutting box 6. Pulp raw materials (plant fiber raw materials, such as sugarcane pulp, bamboo pulp, etc.) enter the cutting box 6 through the pulp inlet pipe 9. The rotating rod 15 drives the cutting blade 23 to rotate at high speed to cut and crush the raw materials. At the same time, water, neutralizing agents and other additives are added to the liquid storage tank 12 and preliminarily mixed with the crushed raw materials in the cutting box 6. The final processed pulp is transported to the subsequent mold process through the pulp outlet pipe 7. The cutting and mixing mechanism integrates "raw material cutting" and "preliminary mixing" in the same equipment, eliminating the need to transfer raw materials between crushing and mixing equipment in traditional processes, reducing process connection time and improving pulp preparation efficiency.

[0030] Example 4: Based on Examples 1-3, such as Figures 5-8 As shown, guide rails 24 are symmetrically arranged on the rotating rod 15, and a suspension block 26 is slidably arranged on the guide rail 24. A cutting blade 23 is hinged on the suspension block 26, and a rotating tube 33 is hinged to the lower end of each cutting blade 23. A connecting block 29 is hinged to the other end of the rotating tube 33, and the connecting block 29 is fixedly arranged on the rotating rod 15.

[0031] Among them, the suspended block 26 can gradually rise with the buoyancy of the pulp mixture.

[0032] Preferably, the rotating tube 33 has a through groove 28, and a sliding block 32 is slidably sleeved on the rotating tube 33. Several cylinders are installed through the sliding block 32, and the cylinders are positioned opposite to the through groove 28. A cutting blade 35 is provided on the cylinder. A connecting rod 27 is hinged to the sliding block 32, and the other end of the connecting rod 27 is hinged to the lower surface of the cutting blade 23.

[0033] The working principle and beneficial effects of the above technical solution are as follows: After the pulp raw material enters the cutting box 6, as the water level rises continuously, it will have an upward buoyancy on the suspension block 26. The suspension block 26 will drive the cutting blade 23 to rotate, and the cutting blade 23 will drive the rotating tube 33 to rotate. The raw material can be mixed with water and neutralizing liquid at the same time as cutting.

[0034] Meanwhile, the cutting blade 23 pulls the sliding block 32 to slide on the rotating tube 33 via the connecting rod 27, and the cutting angle of the cutting blade 23 also changes with the suspension block 26; the cutting blade 23 is dynamically adjusted by buoyancy, and with the auxiliary cutting of the cutting blade 35, it can achieve adaptive crushing for raw materials of different coarseness. In addition, the suspension block 26 can adjust the angle and cutting range of the cutting blade 23 according to the water level and raw material quantity in the cutting box, and at the same time adjust the stirring and mixing range of the rotating tube 33, so that the cutting and mixing efficiency is higher and the speed is faster.

[0035] Example 5: Based on Example 4 above, as follows Figures 3-8 As shown, a cavity 36 is provided inside the rotating rod 15. An inlet pipe 30 and an outlet pipe 34 are installed through the cavity 36. A connecting pipe 31 is connected through the inlet pipe 30. The connecting pipe 31 is connected through the rotating pipe 33. A one-way valve is provided in both the inlet pipe 30 and the outlet pipe 34. A piston plate 37 is provided inside the cavity 36. A moving rod 17 is fixedly provided at the upper end of the piston plate 37. The moving rod 17 slides upward to extend out of the rotating rod 15. A moving block 18 is fixedly provided at the upper end of the moving rod 17. A square frame 46 is installed on the U-shaped rod 20. The square frame 46 is slidably connected to the inner wall of the power box 11. An L-shaped rod 19 is fixedly installed on the upper end of the square frame 46. The L-shaped rod 19 slides out of the power box 11. The other end of the L-shaped rod 19 is fixedly connected to the moving block 18.

[0036] The working principle and beneficial effects of the above technical solution are as follows: When the drive motor 10 drives the U-shaped rod 20 to rotate, the U-shaped rod 20 synchronously pushes the square frame 46 to slide on the inner wall of the power box 11; the square frame 46 drives the moving block 18 to move up and down through the L-shaped rod 19, which in turn drives the moving rod 17 to move up and down, and the moving rod 17 drives the piston plate 37 to move up and down reciprocally; when the piston plate 37 moves upward, a negative pressure is formed in the cavity 36, and the raw material is drawn out of the pulp mixture through the liquid inlet pipe 30; Meanwhile, the pulp mixture will also enter the connecting pipe 31 through the cylinder and the through groove 28, and finally enter the liquid inlet pipe 30. When the piston plate 37 moves downward, the pressure in the cavity 36 increases, and the mixture flows back to the cutting box 6 through the outflow pipe 34. During this process, a liquid circulation will be formed in the cutting box 6, so that the lower pulp mixture flows out from the top, and pulp mixture from multiple different parts can be absorbed, so that the cutting and mixing effect is better and the practicality is stronger.

[0037] Example 6: Based on Example 5 above, as follows Figures 3-5 , Figures 9-11 As shown, a sleeve 38 is slidably sleeved on the guide rail 24. A spring 25 is fixedly installed on the upper end of the sleeve 38. The other end of the spring 25 is rotatably connected to the upper surface of the cutting box 6. Several stabilizing rods 39 are fixedly connected to the sleeve 38. An annular frame 21 is fixedly installed on the other end of each stabilizing rod 39. Several through holes are provided in the annular frame 21. A pipe 22 is connected through the liquid storage tank 12. A liquid outlet pipe 41 is installed on the pipe 22. The liquid outlet pipe 41 is positioned opposite to the annular frame 21.

[0038] Preferably, a fixing plate 42 is fixedly installed on the liquid outlet pipe 41, and a second spring 44 is fixedly installed on the fixing plate 42. The other end of the second spring 44 is fixedly connected to the pipeline 22. A square through groove 43 is opened on the liquid outlet pipe 41, and the liquid outlet pipe 41 is slidably connected to the pipeline 22.

[0039] Preferably, an extension rod 45 is fixedly installed on the fixing plate 42, and an arc-shaped trapezoidal plate 40 is installed on the annular frame 21, with the arc-shaped trapezoidal plate 40 cooperating with the extension rod 45.

[0040] The core function of neutralizing liquid / additives is to adjust the pH value of pulp, improve fiber dispersibility, and help improve the strength and stability of subsequent molded products. There are three common types: 1) acidic neutralizing liquid (adjusting alkaline pulp); 2) alkaline neutralizing liquid (adjusting acidic pulp); 3) weakly alkaline buffer neutralizing liquid (stabilizing pH value).

[0041] The working principle and beneficial effects of the above technical solution are as follows: When the rotating rod 15 rotates, the guide rail 24 rotates synchronously and drives the sleeve 38 to rotate. The sleeve 38 drives the annular frame 21 to rotate through the stabilizing rod 39. When the annular frame 21 moves, the arc-shaped trapezoidal plate 40 on its outer side periodically contacts the extension rod 45 on the liquid outlet pipe 41, pushing the extension rod 45 to drive the fixing plate 42 to compress the second spring 44, so that the liquid outlet pipe 41 slides along the pipeline 22. When the liquid outlet pipe 41 slides, its square through groove 43 is connected to the internal channel of the pipeline 22. The water and neutralizing liquid / auxiliary agent in the storage tank 12 flow to the annular frame 21 through the pipeline 22 and the liquid outlet pipe 41, and then are evenly sprayed into the pulp in the cutting box 6 through the through hole of the annular frame 21. When the arc-shaped trapezoidal plate 40 separates from the extension rod 45, the second spring 44 resets and pulls the liquid outlet pipe 41 to close the channel and stop the addition of auxiliary agent. In addition, as the suspension block 26 rises continuously, it comes into contact with the sleeve 38, causing the sleeve 38 to rise, which in turn causes the annular frame 21 to rise. The rise of the annular frame 21 causes the arc-shaped trapezoidal plate 40 to rise, and the arc-shaped trapezoidal plate 40 causes the extension rod 45 to rise a longer distance. As a result, the area of ​​the square through groove 43 entering the pipe 22 will also increase, thereby accelerating the outflow rate of water and neutralizing liquid / auxiliary agent. That is, as the pulp mixture increases, the amount of water and neutralizing liquid / auxiliary agent added also increases.

[0042] The rotation of the ring frame 21 allows the additives to be sprayed evenly through the through holes, avoiding the local accumulation of additives caused by traditional fixed-point addition. The power for adding additives comes from the original rotational power of the rotating rod 15, eliminating the need for an additional additive delivery pump. The function is expanded through mechanical linkage, which simplifies the overall structure of the equipment, reduces additional energy consumption, and enhances its practicality.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A manufacturing process for a fully smooth, rounded-corner rectangular paper-plastic product, characterized in that, Includes the following steps: S1: After the pulp raw materials are mixed by the cutting and mixing mechanism, the pulp is fed into the mold; S2: The pulp is shaped in a mold into the shape of an upper support (1), an inner support, and a lower support (2); S3: Perform rotary cutting on the upper support (1), inner support and lower support (2); S4: Apply glue to the lower support (2), and then bond the inner support to the lower support (2); S5: Apply glue to the upper support (1) to bond the upper support (1) to the inner support, while the upper support (1) and the lower support (2) come into contact.

2. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 1, characterized in that, The upper support (1) is provided with a groove (3), and the inner support includes symmetrically arranged arc-shaped parts (4). An inverted U-shaped part (5) is fixedly provided on the side of the two arc-shaped parts (4) that are close to each other. In step S4, the arc-shaped part (4) is bonded to the lower support (2), and the horizontal height of the arc-shaped part (4) is higher than the horizontal height of the lower support (2). In step S5, the upper end of the inverted U-shaped part (5) is bonded to the lower surface of the groove (3), and the inner side of the lower end of the upper support (1) is bonded to the arc-shaped part (4).

3. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 1, characterized in that, In step S1, the cutting and mixing mechanism includes a cutting box (6), a number of support rods (8) are fixedly installed at the lower end of the cutting box (6), a slurry inlet pipe (9) is opened on the cutting box (6), and a slurry outlet pipe (7) is provided at the lower end of the cutting box (6); a liquid storage tank (12) is also installed on the cutting box (6).

4. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 3, characterized in that, A power box (11) is provided on the cutting box (6). A drive motor (10) is fixedly provided on one side wall of the power box (11). A U-shaped rod (20) is fixedly connected to the output end of the drive motor (10). A rotating rod (13) is fixedly connected to the other end of the U-shaped rod (20). The rotating rod (13) rotates and extends out of the power box (11). A bevel gear (14) is fixedly connected to the other end of the rotating rod (13). A bevel gear (16) is meshed on the bevel gear (14). A rotating rod (15) is fixedly provided in the center of the bevel gear (16). The rotating rod (15) rotates and extends into the cutting box (6). A cutting blade (23) is installed on the rotating rod (15).

5. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 4, characterized in that, A guide rail (24) is symmetrically arranged on the rotating rod (15). A suspension block (26) is slidably arranged on the guide rail (24). A cutting blade (23) is hinged on the suspension block (26). A rotating tube (33) is hinged to the lower end of the cutting blade (23). A connecting block (29) is hinged to the other end of the rotating tube (33). The connecting block (29) is fixedly arranged on the rotating rod (15).

6. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 5, characterized in that, A through groove (28) is provided on the rotating tube (33), and a sliding block (32) is slidably sleeved on the rotating tube (33). Several cylinders are installed through the sliding block (32), and the cylinders are positioned opposite to the through groove (28). A cutting blade (35) is provided on the cylinder. A connecting rod (27) is hinged on the sliding block (32), and the other end of the connecting rod (27) is hinged to the lower surface of the cutting blade (23).

7. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 6, characterized in that, A cavity (36) is provided inside the rotating rod (15). An inlet pipe (30) and an outlet pipe (34) are installed through the cavity (36). A connecting pipe (31) is connected through the inlet pipe (30). The connecting pipe (31) is connected through the rotating pipe (33). A one-way valve is provided in both the inlet pipe (30) and the outlet pipe (34). A piston plate (37) is provided inside the cavity (36). A moving rod (17) is fixedly provided at the upper end of the piston plate (37). The moving rod (17) slides upward to extend the rotating rod (15). A moving block (18) is fixedly provided at the upper end of the moving rod (17). A square frame (46) is installed on the U-shaped rod (20). The square frame (46) is slidably connected to the inner wall of the power box (11). An L-shaped rod (19) is fixedly installed on the upper end of the square frame (46). The L-shaped rod (19) slides out of the power box (11). The other end of the L-shaped rod (19) is fixedly connected to the moving block (18).

8. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 5, characterized in that, A sleeve (38) is also slidably mounted on the guide rail (24). A spring (25) is fixedly mounted on the upper end of the sleeve (38). The other end of the spring (25) is rotatably connected to the upper surface of the cutting box (6). Several stabilizing rods (39) are fixedly connected on the sleeve (38). An annular frame (21) is fixedly mounted on the other end of each stabilizing rod (39). Several through holes are provided in the annular frame (21). A pipeline (22) is connected through the liquid storage tank (12). An outlet pipe (41) is installed on the pipeline (22). The outlet pipe (41) is positioned opposite to the annular frame (21).

9. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 8, characterized in that, A fixing plate (42) is fixedly installed on the liquid outlet pipe (41), and a spring (44) is fixedly installed on the fixing plate (42). The other end of the spring (44) is fixedly connected to the pipeline (22). A square through groove (43) is opened on the liquid outlet pipe (41), and the liquid outlet pipe (41) is slidably connected to the pipeline (22).

10. The manufacturing process of a fully smooth, rounded-corner rectangular paper-plastic product according to claim 9, characterized in that, An extension rod (45) is fixedly installed on the fixed plate (42), and an arc-shaped trapezoidal plate (40) is installed on the annular frame (21). The arc-shaped trapezoidal plate (40) cooperates with the extension rod (45).

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