A method for cutting and separating pulp boards in paper-plastic direct pressing

Abstract

The present application discloses a method for cutting and separating pulp boards in direct pressing of paper and plastic, which relates to the field of paper and plastic molding, and comprises the following steps: S1: pulping: the raw material pulp is put into a pulping pool, and water is added to crush it to obtain a pulp liquid that meets the requirements; S2: pulping: auxiliary materials are added to the pulp pool liquid to adjust the pulp to meet the production requirements; S3: molding: the pulp is transported to a molding mechanism, and the molding mechanism makes a wet paper embryo; S4: pre-cutting: the wet paper embryo is pre-cut into multiple parts according to the size of the paper and plastic product; S5: hot pressing and die cutting: the conveying mechanism sends the cut wet paper embryo to the next processing place, first hot pressing the wet paper embryo, and then die cutting the hot pressed paper embryo. The present application utilizes the direct pressing production process, and adopts the hot pressing method to drive the dehydration and drying of the wet paper embryo, thereby reducing the production steps of the paper and plastic product. At the same time, after the hot pressing is completed, the paper embryo is cut to obtain multiple paper and plastic products, thereby greatly improving the production efficiency of the paper and plastic product.

Description

Technical Field

[0001] The present application relates to the field of paper-plastic molding, and in particular to a method for cutting and separating pulp boards during direct pressing of paper-plastic. Background Art

[0002] At present, wet pulp molding is the main production method of paper plastic products, and its steps mainly include: first, sorting, crushing, screening, refining and sand removal of raw materials to prepare qualified pulp; then adding appropriate amount of additives to the pulp and adjusting the concentration to prepare the pulp; then forming the pulp through a forming mesh mold, using vacuum or compressed air to deposit and dehydrate the fibers to form a wet paper mold; then drying the wet paper mold to remove most of the moisture; finally, performing processes including shaping and trimming.

[0003] The wet forming process of pulp molding requires dispersing pulp fibers into water, and then filtering through a forming mesh mold to form a wet paper mold. After dehydrating the paper mold, it is also necessary to dry and trim the paper mold. There are many production steps and the production efficiency is low. Summary of the invention

[0004] In order to improve the production efficiency of paper-plastic products, the present application provides a method for cutting and separating pulp boards during paper-plastic direct pressing.

[0005] The present application provides a method for cutting and separating pulp boards during paper-plastic direct pressing, which adopts the following technical solution:

[0006] A method for cutting and separating pulp boards during direct pressing of paper and plastics comprises the following steps: S1: pulping: raw material pulp is put into a pulping pool, and water is added to disintegrate the pulp to obtain pulp liquid that meets the requirements; S2: pulping: auxiliary materials are added to the pulp pool liquid to adjust the pulp to meet the production requirements; S3: molding: the pulp is transported to a molding mechanism, and the molding mechanism makes wet paper embryos; S4: pre-cutting: the wet paper embryos are pre-cut into multiple pieces according to the size of the paper and plastic products; S5: hot pressing and die cutting: the conveying mechanism transports the cut wet paper embryos to the next processing place, firstly hot pressing the wet paper embryos, and then die cutting the hot pressed paper embryos.

[0007] By adopting the above technical solution, the paper-plastic product adopts a direct pressing production process, and uses hot pressing to drive the dehydration and drying of the wet paper embryo, thereby reducing the production steps of the paper-plastic product. At the same time, after the hot pressing is completed, the paper embryo is cut into multiple paper-plastic products, thereby greatly improving the production efficiency of the paper-plastic product.

[0008] Preferably, the forming mechanism and the conveying mechanism are both arranged on a base, a hot pressing die-cutting mechanism is arranged on the base, the forming mechanism comprises a pulp pool, an upper forming plate, a lower forming plate and a first lifting component, the pulp pool is arranged on the base, the lower forming plate is lifted and arranged in the pulp pool, a plurality of first through holes are opened on the top wall of the lower forming plate, the plurality of first through holes are connected with the first suction member, the first lifting member is arranged in the base, the lifting end of the first lifting member passes through the pulp pool and is connected with the lower forming plate, the upper forming plate is arranged at the conveying end of the conveying mechanism, the upper forming plate is located directly above the lower forming plate, a plurality of second through holes are opened on the bottom wall of the upper forming plate, the plurality of second through holes are connected with the second suction member.

[0009] By adopting the above technical solution, the pulp is transported to the pulp pool, the first lifting component drives the lower forming plate to move downward into the slurry, the first suction piece sucks air through the multiple first through holes, so that a wet paper embryo is formed on the top wall of the lower forming plate, and the first lifting component then drives the lower forming plate to move upward out of the slurry, and when the top of the lower forming plate moves to abut the bottom of the upper forming plate, the first suction piece blows air through the multiple first through holes, and the second suction piece sucks air through the multiple second through holes, and the wet paper embryo is adsorbed on the bottom wall of the upper forming plate, and the conveying mechanism then conveys the wet paper embryo to the hot pressing die-cutting mechanism through the upper forming plate. In this way, during the upward movement of the lower forming plate and the movement of the upper forming plate, the first through holes and the second through holes can continuously extract the moisture in the wet paper embryo, thereby reducing the moisture content of the wet paper embryo, which is convenient for the hot pressing die-cutting mechanism to perform hot pressing on the wet paper embryo.

[0010] Preferably, the hot pressing die-cutting mechanism comprises an upper hot pressing plate, a lower hot pressing plate, a second lifting component, a transmission assembly and a plurality of cutters, the second lifting component is arranged on a base, the lower hot pressing plate is arranged at the lifting end of the second lifting component, a plurality of columns are fixedly arranged on the base, and a mounting plate is fixedly arranged on the top of the plurality of columns, the upper hot pressing plate is fixedly arranged on the bottom wall of the mounting plate and is located directly above the lower hot pressing plate, the upper forming plate is located between the upper hot pressing plate and the lower hot pressing plate in the horizontal direction, the plurality of cutters are lifted and arranged in the bottom wall of the upper hot pressing plate, and a receiving groove for accommodating the cutters is opened on the top wall of the lower hot pressing plate, the transmission assembly is arranged on the upper hot pressing plate and the lower hot pressing plate, the transmission assembly is transmission-connected to the lower hot pressing plate and the plurality of cutters, and when the lower hot pressing plate and the upper hot pressing plate complete hot pressing and the lower hot pressing plate moves downward, the lower hot pressing plate drives the plurality of cutters to move downward through the transmission assembly and cuts the paper blank.

[0011] By adopting the above technical solution, the conveying mechanism drives the upper forming plate to move between the upper hot pressing plate and the lower hot pressing plate, the second lifting component drives the lower hot pressing plate to move up and makes the top of the lower hot pressing plate abut against the bottom of the upper forming plate, the second suction piece blows through multiple second through holes, so that the wet paper embryo moves to the lower hot pressing plate, the second lifting component drives the lower hot pressing plate to move down, the conveying mechanism drives the upper forming plate to move and reset, the second lifting component then drives the lower hot pressing plate to move up and clamp the wet paper embryo with the upper hot pressing plate, when the paper embryo completes hot pressing, the second lifting component drives the lower hot pressing plate to move, the lower hot pressing plate drives multiple cutters to move down through the transmission assembly, and the multiple cutters cut the paper embryo, thereby improving the production efficiency of injection molded products.

[0012] Preferably, the transmission assembly includes a lifting rod, a first rack, a first rotating shaft, a first gear, a second gear, a second rotating shaft, a third gear, a second rack, an elastic reset member, a first lifting plate, a first non-return component and a plurality of connecting rods, the lifting rod is fixedly arranged on the side wall of the lower hot pressing plate, the lifting rod moves through the mounting plate, the first rack is fixedly arranged on the side wall of the lifting rod close to the upper hot pressing plate, the first rotating shaft is rotatably arranged in the mounting plate, the first gear is rotatably arranged on the first rotating shaft and meshes with the first rack, the first non-return component is arranged at the rotation connection between the first rotating shaft and the first gear, when the first rack moves upward, the first non-return component unlocks the first gear and the first rotating shaft, the first gear rotates on the first rotating shaft, and when the first rack moves downward The first anti-return component locks the first gear and the first rotating shaft, and the first gear drives the first rotating shaft to rotate; the second gear is fixedly set on the first rotating shaft, and the second rotating shaft is rotatably set in the mounting plate, and the third gear is fixedly set on the second rotating shaft and meshes with the second gear. The second rack is lifted and set in the mounting plate and meshes with the third gear. The diameter of the second gear is larger than the diameter of the first gear, and the diameter of the third gear is smaller than the diameter of the first gear. The elastic reset member is set in the mounting plate and is used to drive the second rack to rise and move and reset. The first lifting plate is fixedly set at the bottom end of the second rack, and multiple connecting rods are fixedly set on the bottom wall of the first lifting plate. The bottom ends of multiple connecting rods are inserted into the upper hot pressing plate and fixedly connected to multiple cutting knives.

[0013] By adopting the above technical solution, when the lower hot pressing plate moves up, the lower hot pressing plate drives the first rack to move upward through the lifting rod, and the first rack drives the first gear to rotate on the first rotating shaft. At this time, the first gear will not drive the second gear to rotate. When the lower hot pressing plate moves down, the first rack moves downward and drives the first gear to rotate, and the first gear drives the first rotating shaft to rotate through the first non-return component, and the first rotating shaft drives the third gear to rotate through the second gear, and the third gear drives the second rack to move downward, and the second rack drives multiple connecting rods to move downward through the first lifting plate, and the connecting rod drives multiple cutters to move downward. Since the second gear and the first gear have the same rotating shaft, the diameter of the second gear is larger than the diameter of the first gear, and the diameter of the third gear is smaller than the diameter of the first gear, therefore, the descending speed of the second rack is greater than the descending speed of the lower hot pressing plate, thereby enabling the cutter to quickly cut the paper blank, and when the cutter completes cutting, the elastic reset member drives the second rack to move upward, thereby driving the cutter to move upward and reset.

[0014] Preferably, a third rack is fixedly installed on the side wall of the lifting rod close to the first rack, the third rack is staggered with the first rack in the horizontal and vertical directions, and the third rack is located obliquely below the first rack, and a third rotating shaft and a fourth rotating shaft are rotatably arranged in the mounting plate, a fourth gear meshing with the third rack is fixedly arranged on the third rotating shaft, and a fifth gear meshing with the fourth gear is fixedly arranged on the fourth rotating shaft, the fifth gear meshes with the second rack, the fourth gear and the fifth gear have the same diameter, and a second anti-return component is provided on the fourth gear, when the third rack moves upward, the second anti-return component unlocks the fourth gear and the fifth gear, and the fourth gear rotates through the fifth gear, and when the third rack moves downward, the second anti-return component locks the fourth gear and the fifth gear, and the fourth gear drives the fifth gear to rotate.

[0015] By adopting the above technical solution, when the lower hot pressing plate moves downward, the third rack first contacts the fourth gear and drives the fourth gear to rotate, and the fourth gear drives the second rack to move downward through the fifth gear, so that the cutter can move downward at the same speed as the lower hot pressing plate. At this time, the cutter presses down on the paper embryo, so that when the lower hot pressing plate moves downward, the paper embryo can be stably located on the lower hot pressing plate. When the third rack is disengaged from the fourth gear, the elastic reset member drives the cutter to rise and reset, and then the first rack is engaged with the first gear again, thereby driving the cutter to move downward quickly to cut the paper embryo.

[0016] Preferably, the first anti-return component includes a plurality of pawls and a first elastic member, the plurality of pawls are rotatably arranged on the first rotating shaft, the plurality of the first elastic members are arranged at the rotating connection between the plurality of pawls and the first rotating shaft, a ratchet groove is opened in the first gear, when the first rack moves upward, the pawl moves through the ratchet groove, and when the first rack moves downward, the pawl is engaged in the ratchet groove.

[0017] By adopting the above technical solution, when the first rack moves upward, the first gear rotates on the first rotating shaft, and the first gear drives the ratchet groove to rotate through the pawl. The pawl is pushed by the ratchet groove and rotates, so that the first gear can rotate on the first rotating shaft. When the first rack moves downward, the first gear drives the ratchet groove to rotate in the opposite direction. Under the action of the first elastic member, the pawl is clamped in the ratchet groove, so that the first gear can drive the first rotating shaft to rotate together.

[0018] Preferably, the second anti-return component includes a plurality of teeth and a second elastic member, and the plurality of teeth are rotatably arranged on the outer surface of the fourth gear at equal intervals along the circumference of the fourth gear, and the plurality of the second elastic members are arranged at the rotational connection between the plurality of teeth and the fourth gear, and a plurality of rotation grooves are opened on the outer surface of the fourth gear, and the teeth are rotatably arranged in the rotation grooves, and the teeth are in contact with the fifth gear, and when the third rack moves upward, the teeth rotate in the rotation groove, and when the third rack moves downward, the teeth abut against the end wall of the rotation groove.

[0019] By adopting the above technical solution, when the third rack moves upward, it drives the fourth gear to rotate forward, and the fourth gear drives the tooth body to move. During the movement of the tooth body, it rotates in the rotating groove, thereby failing to drive the fifth gear to rotate. When the third rack moves downward, it drives the fourth gear to rotate reversely, and the fourth gear drives the tooth body to move. During the movement of the tooth body, it abuts against the end wall of the rotating groove, thereby being able to drive the fifth gear to rotate.

[0020] Preferably, a second lifting plate is provided for lifting and lowering in the lower hot pressing plate, a plurality of limit pins are fixedly provided on the second lifting plate, the limit pins slide through the lower hot pressing plate, a switching mechanism is provided in the lower hot pressing plate, a plurality of avoidance holes are provided on the bottom wall of the upper hot pressing plate, when the lower hot pressing plate moves to abut against the bottom of the upper hot pressing plate, the switching mechanism drives the second lifting plate to move upward, the second lifting plate drives the limit pins to slide out of the lower hot pressing plate and pierce the wet paper blank, when the lower hot pressing plate moves to abut against the bottom of the upper forming plate, the switching mechanism drives the second lifting plate to move downward, the second lifting plate drives the limit pins to slide into the lower hot pressing plate.

[0021] By adopting the above technical solution, when the lower hot pressing plate moves to abut the bottom of the upper forming plate, the switching mechanism drives the second lifting plate to move downward, and the second lifting plate drives the limiting pin to slide into the lower hot pressing plate, so that the wet paper embryo can be stably placed on the lower hot pressing plate; when the lower hot pressing plate moves to abut the bottom of the upper hot pressing plate, the switching mechanism drives the second lifting plate to move upward, and the second lifting plate drives the limiting pin to slide out of the lower hot pressing plate and pierce the wet paper embryo, so that when the cutter cuts the paper embryo, the paper embryo is more stable on the lower hot pressing plate, thereby improving the accuracy of paper embryo cutting.

[0022] Preferably, the switching mechanism includes a first switching rod, a second switching rod, a switching plate, a first magnetic strip, a second magnetic strip and a third magnetic strip, the switching plate being slidably arranged in the lower hot pressing plate along a horizontal direction, the abutting surfaces of the switching plate and the second lifting plate being wedge-shaped surfaces, the top wall of the switching plate being provided with a first wedge-shaped pushing groove and a second wedge-shaped pushing groove, the first switching rod and the second switching rod being both slidably arranged in the lower hot pressing plate along a vertical direction, the first switching rod being located on a side of the second switching rod close to the second lifting plate, the bottom end of the first switching rod being located in the first wedge-shaped pushing groove, the bottom end of the second switching rod being located in the second wedge-shaped pushing groove, the lower hot pressing plate being provided with a sliding groove below the switching plate, the third magnetic strip being fixedly arranged in the middle part of the bottom wall of the switching plate, the first magnetic strip being fixedly arranged on the sliding groove end wall close to the second lifting plate side, and the second magnetic strip being fixedly arranged on the sliding groove end wall away from the second lifting plate side.

[0023] By adopting the above technical solution, when the lower hot pressing plate moves and abuts the bottom of the upper hot pressing plate, the upper hot pressing plate pushes the first switching rod to move downward, the first switching rod moves in the first wedge-shaped pushing groove and drives the switching plate to move toward the direction close to the second lifting plate, the switching plate drives the third magnetic strip to move and absorb the first magnetic strip, and the second lifting plate drives the second lifting plate to move upward during the movement of the second lifting plate, and the second lifting plate drives the limit pin to move upward, and when the lower hot pressing plate moves and abuts the bottom of the upper forming plate, the upper forming plate pushes the second switching rod to move downward, the second switching rod moves in the second wedge-shaped pushing groove and drives the switching plate to move away from the second lifting plate, the switching plate drives the third magnetic strip to move and absorb the second magnetic strip, and the second lifting plate drives the second lifting plate to move downward during the movement of the second lifting plate, and the second lifting plate drives the limit pin to move downward.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The direct pressing production process is used to drive the dehydration and drying of the wet paper embryo by hot pressing, which reduces the production steps of paper-plastic products. At the same time, after the hot pressing is completed, the paper embryo is cut into multiple paper-plastic products, thereby greatly improving the production efficiency of paper-plastic products;

[0026] 2. With the help of the third rack, the fourth gear and the fifth gear, when the lower hot pressing plate moves downward, the third rack first contacts the fourth gear and drives the fourth gear to rotate, and the fourth gear drives the second rack to move downward through the fifth gear, so that the cutter can move downward at the same speed as the lower hot pressing plate. At this time, the cutter presses down the embryonic paper, so that when the lower hot pressing plate moves downward, the embryonic paper can be stably located on the lower hot pressing plate;

[0027] 3. Through the second lifting plate and the limit pin, when the lower hot pressing plate moves to abut the bottom of the upper hot pressing plate, the switching mechanism drives the second lifting plate to move upward, and the second lifting plate drives the limit pin to slide out of the lower hot pressing plate and pierce the wet paper embryo, so that when the cutter cuts the paper embryo, the paper embryo is more stable on the lower hot pressing plate, thereby improving the accuracy of paper embryo cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A flow chart of a method for cutting and separating pulp boards in paper-plastic direct pressing in this application;

[0029] Figure 2 This is a schematic diagram of the overall structure of this application;

[0030] Figure 3 This is a partial structural cross-sectional view of the present application to highlight the forming mechanism;

[0031] Figure 4 This is a cross-sectional view of part of the structure of the upper molding plate to highlight the present application;

[0032] Figure 5 This is a partial structural schematic diagram for highlighting the hot pressing and die cutting mechanism of this application;

[0033] Figure 6 For this application Figure 2 The enlarged schematic diagram at A in the middle;

[0034] Figure 7 This is a cross-sectional view of a part of the structure of the transmission assembly to highlight the present application;

[0035] Figure 8 This is a cross-sectional view of the structure of the transmission assembly from the first perspective for highlighting the present application;

[0036] Fig. 9 This is a cross-sectional view of the structure of the transmission assembly from a second perspective for highlighting the present application;

[0037] Fig.10 This is a partial structural schematic diagram for highlighting the first anti-return component of this application;

[0038] Fig.11 This is a partial structural cross-sectional view for highlighting the second anti-return component of this application;

[0039] Fig.12 This is a partial structural cross-sectional view of the switching mechanism for highlighting the present application;

[0040] Fig.13 For this application Fig.12 Enlarged schematic diagram of point B in the middle.

[0041] Figure numerals: 1, base; 2, feed pipe; 3, conveying mechanism; 4, forming mechanism; 41, pulp pool; 42, upper forming plate; 43, lower forming plate; 44, first lifting component; 5, hot pressing die-cutting mechanism; 51, upper hot pressing plate; 52, lower hot pressing plate; 53, second lifting component; 54, transmission assembly; 5401, lifting rod; 5402, first rack; 5403, first rotating shaft; 5404, first gear ; 5405, second gear; 5406, second rotating shaft; 5407, third gear; 5408, second rack; 5409, elastic reset member; 5410, first lifting plate; 5411, first anti-return member; 54111, ratchet; 54112, first elastic member; 5412, connecting rod; 55, cutter; 6, first through hole; 7, second through hole; 8, column; 9, mounting plate; 10, receiving groove; 1 1. third rack; 12. third rotating shaft; 13. fourth rotating shaft; 15. fourth gear; 16. fifth gear; 17. second anti-return component; 171. tooth body; 172. second elastic member; 18. ratchet groove; 19. rotating groove; 20. second lifting plate; 21. stop pin; 22. switching mechanism; 221. first switching lever; 222. second switching lever; 223. switching plate; 224. first magnetic strip; 225 , the second magnetic strip; 226, the third magnetic strip; 23, the avoidance hole; 24, the first wedge-shaped push groove; 25, the second wedge-shaped push groove; 26, the slide groove; 27, the first guide column; 28, the first module; 29, the first mold groove; 30, the second module; 31, the second mold groove; 32, the connecting plate; 33, the first avoidance groove; 34, the second avoidance groove; 35, the second guide column; 36, the installation groove; 37, the initial cutting knife; 38, the initial cutting groove. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-Figure 13 This application is described in further detail.

[0043] The embodiment of the present application discloses a method for cutting and separating pulp boards during paper-plastic direct pressing.

[0044] Reference Figure 1 and Figure 2 A method for cutting and separating pulp boards during paper-plastic direct pressing comprises the following steps:

[0045] S1: Pulping: The raw material pulp is put into the pulping tank and water is added to break it up to obtain pulp liquid that meets the requirements;

[0046] S2: Slurry preparation: Add auxiliary materials into the slurry pool to adjust the slurry to meet production requirements;

[0047] S3: Forming: The pulp is transported to the forming mechanism 4, and the forming mechanism 4 makes a wet paper embryo;

[0048] S4: Pre-cutting: pre-cut the wet paper blank into multiple pieces according to the size of the paper plastic product;

[0049] S5: Hot pressing and die-cutting: The conveying mechanism 3 conveys the cut wet paper embryo to the hot pressing and die-cutting mechanism 5. The hot pressing and die-cutting mechanism 5 first performs hot pressing on the wet paper embryo, and then performs die-cutting on the hot pressed paper embryo.

[0050] Reference Figure 2 , Figure 3 and Figure 4 The forming mechanism 4, the conveying mechanism 3 and the hot pressing die-cutting mechanism 5 are all installed on the base 1. The forming mechanism 4 includes a pulp pool 41, an upper forming plate 42, a lower forming plate 43 and a first lifting component 44. The pulp pool 41 is fixedly installed on the base 1. A feeding pipe 2 is installed on the side wall of the pulp pool 41, and the pulp after pulping is conveyed to the pulp pool 41 through the feeding pipe 2. The first lifting component 44 is installed on the base 1 and is located below the pulp pool 41. The lifting end of the first lifting component 44 passes through the bottom wall of the pulp pool 41 and extends into the pulp pool 41. In the present application, the first lifting component 44 can be selected as a hydraulic cylinder, and the conveying mechanism 3 can be selected as a linear module.

[0051] The lower forming plate 43 is located in the pulp pool 41 and is fixedly connected to the top of the lifting end of the first lifting component 44. The first guide columns 27 are fixedly installed in the vertical direction at the four corners of the lower forming plate 43 in the pulp pool 41, and the first guide columns 27 slide through the lower forming plate 43. Four first mold grooves 29 are formed inwardly on the top wall of the lower forming plate 43, and a plurality of first through holes 6 are opened on the top wall of the lower forming plate 43 and the first mold grooves 29, and the first through holes 6 are connected to the first suction member. The upper forming plate 42 is fixedly installed at the conveying end of the conveying mechanism 3. The upper forming plate 42 is located directly above the lower forming plate 43. The bottom wall of the upper forming plate 42 is convexly formed with four first modules 28, and a plurality of second through holes 7 are opened on the bottom wall of the upper forming plate 42 and the first module 28, and the second through holes 7 are connected to the second suction member. In the present application, both the first suction member and the second suction member can be selected as air pumps.

[0052] The pulp is transported to the pulp pool 41 through the feeding pipe 2, the lower forming plate 43 is located in the pulp, and the first suction member sucks air through the multiple first through holes 6, so that a wet paper embryo is formed on the top wall of the lower forming plate 43. The first lifting member 44 drives the lower forming plate 43 to move upward, and the lower forming plate 43 moves out of the pulp and is pressed against the bottom wall of the upper forming plate 42. At this time, the first suction member blows air through the multiple first through holes 6, and the second suction member sucks air through the multiple second through holes 7, so that the wet paper embryo moves from the top of the lower forming plate 43 to the bottom of the upper forming plate 42. The first lifting member 44 then drives the lower forming plate 43 to move downward and reset, and the conveying mechanism 3 then drives the upper forming plate 42 to move horizontally into the hot pressing die-cutting mechanism 5.

[0053] Two primary cutting knives 37 are fixedly mounted on the bottom wall of the upper forming plate 42. The two primary cutting knives 37 are mounted perpendicular to each other and are located between the four first modules 28. Two primary cutting grooves 38 are formed on the top wall of the lower forming plate 43. The two primary cutting grooves 38 are located directly below the two primary cutting knives 37 and between the four first die grooves 29.

[0054] When the top wall of the lower forming plate 43 is pressed against the bottom wall of the upper forming plate 42, the primary cutter 37 cuts the wet paper embryo into four parts, each of which corresponds to a first module. In this way, irregular breakage of the wet paper embryo due to pulling during direct pressing is reduced.

[0055] Reference Figure 5 and Figure 6 The hot pressing die-cutting mechanism 5 includes an upper hot pressing plate 51, a lower hot pressing plate 52, a second lifting component 53, a transmission assembly 54 and four cutters 55. Four columns 8 are fixedly installed on the base 1, and a mounting plate 9 is fixedly installed on the top of the four columns 8. The upper hot pressing plate 51 is fixedly installed on the bottom wall of the mounting plate 9. The second lifting component 53 is installed on the base 1, and four second guide columns 35 are fixedly installed on the base 1. The lower hot pressing plate 52 is slidably installed on the four second guide columns 35 along the vertical direction, and the top of the lifting end of the second lifting component 53 is fixedly connected to the middle of the bottom wall of the lower hot pressing plate 52. In the present application, the second lifting component 53 can be selected as a hydraulic cylinder.

[0056] Four second modules 30 are formed on the bottom wall of the upper hot press plate 51 in a convex manner, and four cutters 55 are slidably installed in the upper hot press plate 51 along the vertical direction. The cutter 55 is annular, and the four cutters 55 are respectively located on the outer peripheral sides of the four second modules 30. Four second mold grooves 31 are formed on the top wall of the lower hot press plate 52 in a concave manner, and the lower hot press plate 52 is provided with accommodating grooves 10 on the outer peripheral sides of the four second mold grooves 31. The four accommodating grooves 10 are located directly below the four cutters 55 and are used to accommodate the cutters 55. The transmission assembly 54 is installed in the upper hot press plate 51, the mounting plate 9 and the lower hot press plate 52, and the transmission assembly 54 is connected to the lower hot press plate 52 and the four cutters 55.

[0057] Reference Figure 2 , Figure 3 and Figure 5 The conveying mechanism 3 drives the upper forming plate 42 to move to the top of the lower hot pressing plate 52, the second lifting component 53 first drives the lower hot pressing plate 52 to move upward, so that the top of the lower hot pressing plate 52 is pressed against the upper forming plate 42, the second suction piece blows air through the plurality of second through holes 7, so that the wet paper blank moves to the lower hot pressing plate 52, the second lifting component 53 then drives the lower hot pressing plate 52 to move downward, and the conveying mechanism 3 drives the upper forming plate 42 to move and reset.

[0058] Subsequently, the second lifting component 53 drives the lower hot pressing plate 52 to move upward, so that the top of the lower hot pressing plate 52 is pressed against the bottom of the upper hot pressing plate 51. At this time, the upper hot pressing plate 51 and the lower hot pressing plate 52 clamp the wet paper embryo, and the upper hot pressing plate 51 and the lower hot pressing plate 52 heat the wet paper embryo, so that the wet paper embryo is quickly dehydrated and dried. After the wet paper embryo is hot-pressed, the second lifting component 53 drives the lower hot pressing plate 52 to move downward. At this time, the lower hot pressing plate 52 drives the four cutters 55 to move downward quickly through the transmission component 54. The cutters 55 move quickly and cut the paper embryo, so that four paper-plastic products can be quickly obtained, which greatly improves the production efficiency of paper-plastic products.

[0059] Reference Figure 5 , Figure 7 , Figure 8 and Fig. 9 The transmission assembly 54 includes a first lifting plate 5410, four lifting rods 5401, a first rack 5402, a first rotating shaft 5403, a first gear 5404, a second gear 5405, a second rotating shaft 5406, a third gear 5407, a second rack 5408, an elastic reset member 5409, a first non-return component 5411 and a plurality of connecting rods 5412. A mounting groove 36 is provided on the top wall of the mounting plate 9, the first lifting plate 5410 is slidably installed in the mounting groove 36 along the vertical direction, a plurality of connecting rods 5412 are slidably installed in the upper hot pressing plate 51 along the vertical direction, the bottom end of the connecting rod 5412 is fixedly connected to the top of the cutter 55, and the top end is fixedly connected to the bottom wall of the first lifting plate 5410.

[0060] The four second racks 5408 are fixedly installed at the four corners of the top wall of the first lifting plate 5410. A connecting plate 32 is fixedly installed on the side wall of the second rack 5408. One end of the elastic reset member 5409 is fixedly connected to the connecting plate 32, and the other end is fixedly connected to the mounting plate 9. In the present application, the elastic reset member 5409 can be selected as a spring.

[0061] The four lifting rods 5401 are fixedly mounted at the four corners of the two opposite side walls of the lower hot press plate 52, and each lifting rod 5401 slides through the mounting plate 9. The four first racks 5402 are fixedly mounted on the side walls of the four lifting rods 5401 close to the upper hot press plate 51. The four first rotating shafts 5403 are rotatably mounted in the mounting plate 9 close to the four lifting rods 5401, the first gear 5404 is rotatably mounted on the first rotating shaft 5403, and the first anti-return component 5411 is mounted at the connection between the first gear 5404 and the first rotating shaft 5403.

[0062] The second gear 5405 is fixedly mounted on the first rotating shaft 5403. The second gear 5405 is coaxially mounted with the first gear 5404, and the diameter of the second gear 5405 is larger than the diameter of the first gear 5404. The four second rotating shafts 5406 are rotatably mounted in the mounting plate 9 near the four lifting rods 5401. The third gear 5407 is fixedly mounted on the second rotating shaft 5406. The diameter of the third gear 5407 is smaller than the diameter of the first gear 5404. The third gear 5407 is meshed with the second gear 5405, and the side of the third gear 5407 away from the second gear 5405 is meshed with the second rack 5408.

[0063] Reference Fig.10 The first anti-return component 5411 includes four ratchet pawls 54111 and a first elastic member 54112. The four ratchet pawls 54111 are rotatably mounted on the outer peripheral side wall of the first rotating shaft 5403. A ratchet groove 18 is provided on the side wall of the first gear 5404. The four ratchet pawls 54111 are located in the ratchet groove 18. The four first elastic members 54112 are mounted at the rotation connection between the four ratchet pawls 54111 and the first rotating shaft 5403. In the present application, the first elastic member 54112 can be selected as a spring sheet.

[0064] Reference Figure 8 and Fig.10 When the lower hot press plate 52 moves upward, the lower hot press plate 52 drives the lifting rod 5401 to move upward, the lifting rod 5401 drives the first rack 5402 to move upward, the first rack 5402 moves and meshes with the first gear 5404, at this time, the first rack 5402 drives the first gear 5404 to rotate forward, the ratchet groove 18 rotates through the pawl 54111, so that the first gear 5404 rotates on the first rotating shaft 5403, and the first gear 5404 will not drive the second gear 5405 to rotate.

[0065] When the lower hot press plate 52 moves downward, the lower hot press plate 52 drives the lifting rod 5401 to move downward, the lifting rod 5401 drives the first rack 5402 to move downward, the first rack 5402 moves and meshes with the first gear 5404, at this time the first rack 5402 drives the first gear 5404 to reverse, during the rotation of the ratchet groove 18, the first elastic member 54112 drives the pawl 54111 to be engaged in the ratchet groove 18, so that the first gear 5404 can drive the first rotating shaft 5403 to rotate, and then drive the second gear 5405 to rotate.

[0066] The second gear 5405 drives the third gear 5407 to rotate, the third gear 5407 drives the second rack 5408 to move downward, the four second racks 5408 drive the first lifting plate 5410 to move downward, and the first lifting plate 5410 drives the four cutters 55 to move downward together through a plurality of connecting rods 5412. Since the diameter of the second gear 5405 is greater than the diameter of the first gear 5404, and the diameter of the third gear 5407 is smaller than the diameter of the first gear 5404, the descending speed of the second rack 5408 is greater than the descending speed of the lower hot pressing plate 52, so that the cutter 55 can quickly cut the paper blank.

[0067] When the cutter 55 completes cutting, the first rack 5402 is disengaged from the first gear 5404. At this time, the elastic reset member 5409 drives the second rack 5408 to move upward, and the second rack 5408 drives the second gear 5405 and the first gear 5404 to idle through the third gear 5407, thereby driving the cutter 55 to move upward and reset to the upper hot pressing plate 51.

[0068] Reference Figure 8 and Fig. 9 , a third rack 11 is fixedly mounted on the side wall of each lifting rod 5401 near the first rack 5402, the third rack 11 is located obliquely below the first rack 5402, and there is a certain interval between the third rack 11 and the first rack 5402 in the vertical direction. The mounting plate 9 is located near the four lifting rods 5401 and is rotatably mounted with a third rotating shaft 12 and a fourth rotating shaft 13, each third rotating shaft 12 is fixedly mounted with a fourth gear 15, and each fourth rotating shaft 13 is fixedly mounted with a fifth gear 16. The diameter of the first gear 5404 is the same as that of the fourth gear 15, the diameter of the fourth gear 15 is the same as that of the fifth gear 16, and the thickness of the fourth gear 14 is greater than that of the fifth gear 16. The fourth gear 15 is meshed with the third rack 11, and one side of the fifth gear 16 is meshed with the second rack 5408.

[0069] Reference Figure 8 and Fig.10 The fourth gear 15 is provided with a second anti-return component 17, which includes a plurality of teeth 171 and a second elastic component 172. A plurality of rotation grooves 19 are formed around the middle of the outer peripheral side wall of the fourth gear 15 at equal intervals. The plurality of teeth 171 are respectively rotatably installed in the plurality of rotation grooves 19 of the fourth gear 15 through a rotating shaft, and the end of the tooth 171 away from the fourth gear 15 moves to abut against the teeth of the fifth gear 16. The second elastic component 172 is installed at the connection between the tooth 171 and the fourth gear 15. In the present application, the second elastic component 172 can be selected as a torsion spring.

[0070] When the lower hot press plate 52 moves upward, the lower hot press plate 52 drives the lifting rod 5401 to move upward, and the lifting rod 5401 drives the third rack 11 to move upward, and the third rack 11 moves and meshes with the fourth gear 15. At this time, the third rack 11 drives the fourth gear 15 to rotate forward, and the fourth gear 15 drives the multiple gear bodies 171 to rotate. During the rotation process, the gear body 171 rotates in the rotating groove 19, thereby being unable to drive the fifth gear 16 to rotate.

[0071] When the lower hot press plate 52 moves downward, the lower hot press plate 52 drives the lifting rod 5401 to move downward, the lifting rod 5401 drives the third rack 11 to move downward, the third rack 11 moves and meshes with the fourth gear 15, at this time the third rack 11 drives the fourth gear 15 to reverse, the fourth gear 15 drives the tooth body 171 to rotate, the tooth body 171 abuts against the end wall of the rotating groove 19 during the rotation process, thereby driving the fifth gear 16 to rotate.

[0072] Reference Figure 8 and Fig. 9 When the lower hot pressing plate 52 moves downward, the lifting rod 5401 drives the third rack 11 to engage with the fourth gear 15 first, and the fourth gear 15 drives the second rack 5408 to move downward through the fifth gear 16. Since the fourth gear 15 and the fifth gear 16 have the same diameter, the cutter 55 can move downward at the same speed as the lower hot pressing plate 52. At this time, the cutter 55 presses down the paper embryo, so that when the lower hot pressing plate 52 moves downward, the paper embryo can be stably located on the lower hot pressing plate 52.

[0073] When the third rack 11 is out of mesh with the fourth gear 15, the elastic reset member 5409 can drive the second rack 5408 to move upward through the connecting plate 32, and the second rack 5408 drives the cutter 55 to move upward and reset to the upper hot pressing plate 51 through the connecting rod 5412. Then the first rack 5402 is meshed with the first gear 5404, and then drives the cutter 55 to move downward quickly to cut the paper embryo. In this way, before cutting the paper embryo, the cutter 55 descends at the same speed as the lower hot pressing plate 52, so that the paper embryo can be stably located on the lower hot pressing plate 52.

[0074] Reference Figure 5 , Figure 6 , Fig.12 and Fig.13 A second lifting plate 20 is installed in the lower hot pressing plate 52 along the vertical direction. A plurality of stop pins 21 are fixedly installed on the top wall of the second lifting plate 20. The plurality of stop pins 21 slide through the lower hot pressing plate 52, and the plurality of stop pins 21 surround the outer peripheral sides of the four receiving grooves 10. A switching mechanism 22 is installed in the lower hot pressing plate 52. The switching mechanism 22 controls the lifting and lowering movement of the second lifting plate 20, and a plurality of avoidance holes 23 for accommodating the stop pins 21 are opened on the bottom wall of the upper hot pressing plate 51.

[0075] Reference Fig.12 and Fig.13 The switching mechanism 22 includes two first switching rods 221, a second switching rod 222, a switching plate 223, a first magnetic strip 224, a second magnetic strip 225 and a third magnetic strip 226. The two switching plates 223 are both slidably installed in the lower hot press plate 52 along the horizontal direction and are located on the opposite sides of the second lifting plate 20. The opposite sides of the bottom wall of the second lifting plate 20 and the sides close to the top walls of the two switching plates 223 are both set as wedge-shaped surfaces and fit each other.

[0076] The two first switching rods 221 and the second switching rod 222 are both slidably mounted on the lower hot pressing plate 52 in the vertical direction and are located above the two switching plates 223. A first wedge-shaped push groove 24 is provided on the top wall of the switching plate 223 close to the second lifting plate 20, and the bottom end of the first switching rod 221 is located in the first wedge-shaped push groove 24. A second wedge-shaped push groove 25 is provided on the top wall of the switching plate 223 away from the second lifting plate 20, and the bottom end of the second switching rod 222 is located in the second wedge-shaped push groove 25.

[0077] Reference Figure 4 and Figure 5 A first avoidance groove 33 for accommodating the first switching rod 221 is opened on the bottom wall of the upper forming plate 42 and located directly above the first switching rod 221, and a second avoidance groove 34 for accommodating the second switching rod 222 is opened on the bottom wall of the upper hot pressing plate 51 and located directly above the second switching rod 222.

[0078] Reference Fig.12 and Fig.13 The two third magnetic strips 226 are fixedly mounted in the middle of the bottom wall of the two switching plates 223. Two slide slots 26 are provided in the lower hot press plate 52. The third magnetic strips 226 are slidably mounted in the slide slots 26 along the horizontal direction. The two first magnetic strips 224 are fixedly mounted on the side wall of the lower hot press plate 52 located in the slide slots 26 close to the second lifting rod 5401. The two second magnetic strips 225 are fixedly mounted on the side wall of the lower hot press plate 52 located in the slide slots 26 away from the second lifting rod 5401.

[0079] Reference Figure 4 , Figure 5 , Figure 6 , Fig.12 and Fig.13When the lower hot pressing plate 52 moves to abut the bottom of the upper forming plate 42, the upper forming plate 42 pushes the second switching rod 222 to move downward, the second switching rod 222 moves in the second wedge-shaped push groove 25 and drives the switching plate 223 to move away from the second lifting plate 20, the switching plate 223 pushes the first switching rod 221 to move upward through the first wedge-shaped push groove 24, and the top of the first switching rod 221 moves into the first avoidance groove 33. The two switching plates 223 drive the two third magnetic strips 226 to move and absorb the two second magnetic strips 225, so as to position the switching plates 223. During the movement of the two switching plates 223 away from the second lifting plate 20, the second lifting plate 20 moves downward under the action of gravity, and the second lifting plate 20 then drives the limit pin 21 to move downward into the lower hot pressing plate 52.

[0080] When the lower hot pressing plate 52 moves to abut against the bottom of the upper hot pressing plate 51, the upper hot pressing plate 51 pushes the first switching rod 221 to move downward, the first switching rod 221 moves in the first wedge-shaped push groove 24 and drives the switching plate 223 to move toward the second lifting plate 20, the switching plate 223 pushes the second switching rod 222 to move upward through the second wedge-shaped push groove 25, and the top of the second switching rod 222 moves into the second avoidance groove 34. The two switching plates 223 drive the two third magnetic strips 226 to move and absorb the two first magnetic strips 224, so as to position the switching plates 223. During the movement of the two switching plates 223 toward the second lifting plate 20, the wedge-shaped surface drives the second lifting plate 20 to move upward, and the second lifting plate 20 drives the limit pin 21 to move upward, and the limit pin 21 pierces the wet paper blank and enters the avoidance hole 23. In this way, the embryonic paper can be positioned so that when the cutter 55 cuts the embryonic paper, the embryonic paper is more stable on the lower hot pressing plate 52, thereby improving the accuracy of the embryonic paper cutting.

[0081] The implementation principle of the method for cutting and separating pulp boards in a paper-plastic direct pressing of the embodiment of the present application is as follows: the pulp is transported to the pulp pool 41 through the feed pipe 2, the lower forming plate 43 is located in the slurry, and the first suction member sucks air through the multiple first through holes 6, so that a wet paper embryo is formed on the top wall of the lower forming plate 43. The first lifting member 44 drives the lower forming plate 43 to move upward, and the lower forming plate 43 moves out of the slurry and is pressed against the bottom wall of the upper forming plate 42. At this time, the first suction member blows air through the multiple first through holes 6, and the second suction member sucks air through the multiple second through holes 7, so that the wet paper embryo moves from the top of the lower forming plate 43 to the bottom of the upper forming plate 42, and the first lifting member 44 then drives the lower forming plate 43 to move downward and reset.

[0082] The conveying mechanism 3 drives the upper forming plate 42 to move to the top of the lower hot pressing plate 52, and the second lifting component 53 first drives the lower hot pressing plate 52 to move upward, so that the top of the lower hot pressing plate 52 is pressed against the upper forming plate 42, and the second suction piece blows air through the plurality of second through holes 7 to move the wet paper blank onto the lower hot pressing plate 52, and the second lifting component 53 drives the lower hot pressing plate 52 to move downward, and the conveying mechanism 3 drives the upper forming plate 42 to move and reset.

[0083] The second lifting component 53 then drives the lower hot pressing plate 52 to move upward, so that the top of the lower hot pressing plate 52 is pressed against the bottom of the upper hot pressing plate 51. At this time, the upper hot pressing plate 51 and the lower hot pressing plate 52 clamp the wet paper embryo, and the upper hot pressing plate 51 and the lower hot pressing plate 52 heat the wet paper embryo, so that the wet paper embryo is quickly dehydrated and dried. After the wet paper embryo is hot-pressed, the second lifting component 53 drives the lower hot pressing plate 52 to move downward. At this time, the lower hot pressing plate 52 drives the four cutters 55 to move downward quickly through the transmission component 54. The cutters 55 move quickly and cut the paper embryo, so that four paper-plastic products can be quickly obtained, which greatly improves the production efficiency of paper-plastic products.

[0084] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for cutting and separating pulp boards during paper-plastic direct pressing, characterized in that: The following steps are involved: S1: Pulping: The raw material pulp is put into the pulping tank and water is added to break it up to obtain pulp liquid that meets the requirements; S2: Slurry preparation: Add auxiliary materials into the slurry pool to adjust the slurry to meet production requirements; S3: Forming: The pulp is transported to a forming mechanism (4), and the forming mechanism (4) produces a wet paper embryo; S4: Pre-cutting: pre-cut the wet paper blank into multiple pieces according to the size of the paper plastic product; S5: hot pressing and die cutting: the conveying mechanism (3) conveys the cut wet paper blank to the next processing place, firstly hot pressing the wet paper blank, and then die cutting the hot pressed paper blank; A hot pressing die-cutting mechanism (5) is arranged on the base (1), and the hot pressing die-cutting mechanism (5) comprises an upper hot pressing plate (51), a lower hot pressing plate (52), a second lifting component (53), a transmission assembly (54) and a plurality of cutters (55), and the transmission assembly (54) comprises a lifting rod (5401), a first rack (5402), a first rotating shaft (5403), a first gear (5404), a second gear (5405), a second rotating shaft (5406), a third gear (5407), a second rack (5408), an elastic reset member (5409), a first lifting plate (5410), a first anti-return component (5411) and a plurality of connecting rods (5412), and the lifting rod (5 401) is fixedly arranged on the side wall of the lower hot pressing plate (52), the lifting rod (5401) moves through the mounting plate (9), the first rack (5402) is fixedly arranged on the side wall of the lifting rod (5401) close to the upper hot pressing plate (51), the first rotating shaft (5403) is rotatably arranged in the mounting plate (9), the first gear (5404) is rotatably arranged on the first rotating shaft (5403) and meshes with the first rack (5402), the first anti-return component (5411) is arranged at the rotation connection between the first rotating shaft (5403) and the first gear (5404), and when the first rack (5402) moves upward, the first anti-return component (5411) unlocks the first gear (5404) 404) and the first rotating shaft (5403), the first gear (5404) rotates on the first rotating shaft (5403), when the first rack (5402) moves downward, the first anti-return component (5411) locks the first gear (5404) and the first rotating shaft (5403), and the first gear (5404) drives the first rotating shaft (5403) to rotate; the second gear (5405) is fixedly arranged on the first rotating shaft (5403), the second rotating shaft (5406) ​​is rotatably arranged in the mounting plate (9), the third gear (5407) is fixedly arranged on the second rotating shaft (5406) ​​and meshes with the second gear (5405), and the second rack (5408) is lifted and lowered on the mounting plate (9). The plate (9) is in the interior and meshes with the third gear (5407), the diameter of the second gear (5405) is larger than the diameter of the first gear (5404), the diameter of the third gear (5407) is smaller than the diameter of the first gear (5404), the elastic reset member (5409) is arranged in the mounting plate (9) and is used to drive the second rack (5408) to move up and reset, the first lifting plate (5410) is fixedly arranged at the bottom end of the second rack (5408), and the plurality of connecting rods (5412) are fixedly arranged on the bottom wall of the first lifting plate (5410), and the bottom ends of the plurality of connecting rods (5412) are inserted into the upper hot pressing plate (51) and fixedly connected to the plurality of cutting knives (55).

2. The method for cutting and separating pulp boards during paper-plastic direct pressing according to claim 1, characterized in that: The forming mechanism (4) and the conveying mechanism (3) are both arranged on the base (1). The forming mechanism (4) comprises a pulp pool (41), an upper forming plate (42), a lower forming plate (43) and a first lifting component (44). The pulp pool (41) is arranged on the base (1). The lower forming plate (43) is lifted and arranged in the pulp pool (41). A plurality of first through holes (6) are provided on the top wall of the lower forming plate (43). The plurality of first through holes (6) are connected to a first suction member. The first lifting component (44) is arranged in the base (1). The lifting end of the first lifting component (44) passes through the pulp pool (41) and is connected to the lower forming plate (43). The upper forming plate (42) is arranged at the conveying end of the conveying mechanism (3). The upper forming plate (42) is located directly above the lower forming plate (43). A plurality of second through holes (7) are provided on the bottom wall of the upper forming plate (42). The plurality of second through holes (7) are connected to a second suction member.

3. The method for cutting and separating pulp boards in paper-plastic direct pressing according to claim 2, characterized in that: The second lifting component (53) is arranged on the base (1), the lower hot pressing plate (52) is arranged at the lifting end of the second lifting component (53), a plurality of columns (8) are fixedly arranged on the base (1), a mounting plate (9) is fixedly arranged on the top of the plurality of columns (8), the upper hot pressing plate (51) is fixedly arranged on the bottom wall of the mounting plate (9) and is located directly above the lower hot pressing plate (52), the upper forming plate (42) is located between the upper hot pressing plate (51) and the lower hot pressing plate (52) in the horizontal direction, and the plurality of cutting knives (55) are lifted and lowered on the upper hot pressing plate (51). A receiving groove (10) for receiving a cutter (55) is provided on the top wall of the lower hot pressing plate (52) and the bottom wall of the pressing plate (51). The transmission assembly (54) is arranged on the upper hot pressing plate (51) and the lower hot pressing plate (52). The transmission assembly (54) transmits and connects the lower hot pressing plate (52) and the plurality of cutters (55). When the lower hot pressing plate (52) and the upper hot pressing plate (51) complete hot pressing and the lower hot pressing plate (52) moves downward, the lower hot pressing plate (52) drives the plurality of cutters (55) to move downward through the transmission assembly (54) and cuts the paper blank.

4. The method for cutting and separating pulp boards in paper-plastic direct pressing according to claim 3, characterized in that: A third rack (11) is fixedly mounted on the side wall of the lifting rod (5401) close to the first rack (5402); the third rack (11) is staggered with the first rack (5402) in the horizontal and vertical directions, and the third rack (11) is located obliquely below the first rack (5402); a third rotating shaft (12) and a fourth rotating shaft (13) are rotatably arranged in the mounting plate (9); a fourth gear (15) meshing with the third rack (11) is fixedly arranged on the third rotating shaft (12); and a fifth gear (16) meshing with the fourth gear (15) is fixedly arranged on the fourth rotating shaft (13). The fifth gear (16) is meshed with the second rack (5408), the fourth gear (15) and the fifth gear (16) have the same diameter, and the fourth gear (15) is provided with a second anti-return component (17). When the third rack (11) moves upward, the second anti-return component (17) unlocks the fourth gear (15) and the fifth gear (16), and the fourth gear (15) rotates through the fifth gear (16). When the third rack (11) moves downward, the second anti-return component (17) locks the fourth gear (15) and the fifth gear (16), and the fourth gear (15) drives the fifth gear (16) to rotate.

5. The method for cutting and separating pulp boards in paper-plastic direct pressing according to claim 3, characterized in that: The first anti-return component (5411) includes a plurality of ratchet pawls (54111) and a first elastic member (54112). The plurality of ratchet pawls (54111) are rotatably arranged on the first rotating shaft (5403). The plurality of first elastic members (54112) are arranged at the rotating connection between the plurality of ratchet pawls (54111) and the first rotating shaft (5403). A ratchet groove (18) is provided in the first gear (5404). When the first rack (5402) moves upward, the ratchet pawl (54111) moves through the ratchet groove (18). When the first rack (5402) moves downward, the ratchet pawl (54111) is engaged in the ratchet groove (18).

6. The method for cutting and separating pulp boards during paper-plastic direct pressing according to claim 4, characterized in that: The second anti-return component (17) comprises a plurality of tooth bodies (171) and a second elastic member (172); the plurality of tooth bodies (171) are rotatably arranged on the outer surface of the fourth gear (15) at equal intervals along the circumference of the fourth gear (15); the plurality of second elastic members (172) are arranged at the rotation connection between the plurality of tooth bodies (171) and the fourth gear (15); a plurality of rotation grooves (19) are provided on the outer surface of the fourth gear (15); the tooth bodies (171) are rotatably arranged in the rotation grooves (19), and the tooth bodies (171) are in contact with the fifth gear (16); when the third rack (11) moves upward, the tooth bodies (171) rotate in the rotation grooves (19); when the third rack (11) moves downward, the tooth bodies (171) abut against the end wall of the rotation grooves (19).

7. The method for cutting and separating pulp boards during paper-plastic direct pressing according to claim 3, characterized in that: A second lifting plate (20) is provided in the lower hot pressing plate (52) for lifting and lowering, and a plurality of limiting pins (21) are fixedly provided on the second lifting plate (20). The limiting pins (21) slide through the lower hot pressing plate (52). A switching mechanism (22) is provided in the lower hot pressing plate (52). A plurality of avoidance holes (23) are provided on the bottom wall of the upper hot pressing plate (51). When the lower hot pressing plate (52) moves to abut against the bottom of the upper hot pressing plate (51), the switching mechanism (22) drives the second lifting plate (20) to move upward, and the second lifting plate (20) drives the limiting pins (21) to slide out of the lower hot pressing plate (52) and pierce the wet paper blank. When the lower hot pressing plate (52) moves to abut against the bottom of the upper forming plate (42), the switching mechanism (22) drives the second lifting plate (20) to move downward, and the second lifting plate (20) drives the limiting pins (21) to slide into the lower hot pressing plate (52).

8. The method for cutting and separating pulp boards during paper-plastic direct pressing according to claim 7, characterized in that: The switching mechanism (22) comprises a first switching rod (221), a second switching rod (222), a switching plate (223), a first magnetic strip (224), a second magnetic strip (225) and a third magnetic strip (226); the switching plate (223) is slidably arranged in the lower hot pressing plate (52) along the horizontal direction; the contact surfaces of the switching plate (223) and the second lifting plate (20) are both wedge-shaped surfaces; a first wedge-shaped push groove (24) and a second wedge-shaped push groove (25) are provided on the top wall of the switching plate (223); the first switching rod (221) and the second switching rod (222) are both slidably arranged in the lower hot pressing plate (52) along the vertical direction; the first switching rod (221) Located on the side of the second switching rod (222) close to the second lifting plate (20), the bottom end of the first switching rod (221) is located in the first wedge-shaped push groove (24), the bottom end of the second switching rod (222) is located in the second wedge-shaped push groove (25), and a slide groove (26) is opened in the lower hot pressing plate (52) below the switching plate (223). The third magnetic strip (226) is fixedly arranged in the middle of the bottom wall of the switching plate (223), the first magnetic strip (224) is fixedly arranged on the end wall of the slide groove (26) close to the side of the second lifting plate (20), and the second magnetic strip (225) is fixedly arranged on the end wall of the slide groove (26) away from the second lifting plate (20).

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