A paper-plastic molding machine and its molding method

Abstract

The application belongs to the field of paper-plastic forming, and particularly relates to a paper-plastic forming machine and a forming method thereof, which comprises a suction filtration forming device and a shaping and transferring device. The suction filtration forming device comprises a pulp pool and a suction filtration forming die. The suction filtration forming die comprises a suction pulp lower die and a first suction assembly. The suction pulp lower die is provided with a die cavity. The outer surface of the die cavity is provided with a first gas-liquid hole. The first suction assembly is connected with the first gas-liquid hole. The shaping and transferring device comprises a moving assembly and an upper die assembly. The upper die assembly comprises an upper die, a second suction assembly and a third suction assembly. The upper die is provided with a die groove. The inner wall of the lower end of the die groove is provided with an air bag. The air bag is provided with a second gas-liquid hole. The inner wall of the die groove is provided with a third gas-liquid hole. The paper-plastic forming machine provided by the application can improve the shaping effect of the wet blank, reduce the water content of the wet blank, reduce burrs of the wet blank, improve the quality of the wet blank, and transfer the wet blank for direct processing of the next process.

Description

Technical Field

[0001] This invention belongs to the field of paper-plastic molding, specifically relating to a paper-plastic molding machine and its molding method. Background Technology

[0002] Given the environmental hazards of plastic products, there is a growing trend of developing products made from a mixture of paper pulp and / or plant fiber materials. These products are produced by applying the pulp to a mold using a suction mold, followed by hot pressing and shaping. These are generally called paper-plastic products, or sometimes molded products or paper pulp molded products, to distinguish them from plastic products. Paper-plastic products are easy to recycle, remanufacture, and reuse, aligning with the trends of environmental protection, energy conservation, and carbon reduction. Therefore, they have been rapidly accepted and adopted by businesses and the public. Common examples of paper-plastic products include bowls, plates, cup lids, packaging materials, shock-absorbing materials, and cushioning materials.

[0003] The manufacturing of paper-plastic products basically involves several processes, including wet preform forming, hot pressing and setting, finished product transfer, and end-of-life finishing. Among these, wet preform forming and hot pressing and setting are the main forming processes, generally requiring a paper-plastic product forming machine. Finished product transfer and end-of-life finishing are processes that collect and transfer the finished products after the initial forming process (e.g., trimming, inspection, packaging). Therefore, the key to the success of automated paper-plastic product forming machines lies not only in having a good machine but also in using appropriate manufacturing methods (process steps) to produce high-quality paper-plastic products.

[0004] Taking the Chinese patent "CN201020283064.4 Fully Automatic Plant Fiber Molding Machine with Multifunctional Auxiliary Device" as an example, current paper-plastic molding machines have the following problems: 1. The surface of the molded wet blank is prone to unevenness, and burrs are also prone to appear after hot pressing. During subsequent processing, the presence of burrs causes flying debris, polluting the working environment. 2. The current wet blank has a high moisture content, which increases the burden of subsequent hot pressing and shaping, as well as the quality of the finished product. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a paper-plastic molding machine and its molding method that can improve the shaping effect of wet blanks, reduce the moisture content of wet blanks, reduce the burrs of wet blanks and improve the quality of wet blanks by adding air bladders, and can transfer wet blanks directly to the next processing step.

[0006] This invention provides a paper-plastic forming machine, including a suction forming device and a shaping and transfer device;

[0007] The suction filter forming device includes a slurry tank and a suction filter forming mold that is lifted and installed in the slurry tank. The suction filter forming mold includes a lower suction mold and a first suction component. The upper surface of the lower suction mold is provided with a plurality of upwardly protruding mold cavities. The outer surface of the mold cavity is provided with a plurality of first gas-liquid holes. The first suction component is connected to the plurality of first gas-liquid holes.

[0008] The shaping and transfer device includes a moving component and an upper mold component disposed on the output end of the moving component. The upper mold component includes an upper mold, a second suction component, and a third suction component. The lower surface of the upper mold is provided with a plurality of mold grooves corresponding to the mold cavity. An air bladder is provided on the inner wall of the lower end of the mold groove. A plurality of second air-liquid holes are provided on the air bladder. A third air-liquid hole is provided on the inner wall of the mold groove. The third air-liquid hole corresponds one-to-one with the second air-liquid hole. The second suction component is connected to the air bladder, and the third suction component is connected to the plurality of third air-liquid holes.

[0009] The inner wall of the airbag forms a molding cavity with the mold cavity to accommodate the wet blank.

[0010] Furthermore, the second gas-liquid orifice and the first gas-liquid orifice are arranged alternately.

[0011] Furthermore, one side of the airbag is bonded to the inner wall of the mold groove.

[0012] Furthermore, when the second suction assembly inflates the airbag, at least part of the diameter of the second gas-liquid orifice is reduced.

[0013] Furthermore, a cylindrical support structure is provided on the inner wall of the second gas-liquid hole located at the central axis of the airbag, so that the diameter of the second gas-liquid hole located at the central axis of the airbag remains unchanged when the second suction assembly inflates the airbag.

[0014] Furthermore, the suction filter forming device also includes a lifting assembly, which drives the suction filter forming mold to move up and down along the height direction of the slurry tank.

[0015] Furthermore, the moving component is a horizontal reciprocating linear moving mechanism, and in at least one stroke, the upper mold component is longitudinally aligned with the suction forming mold.

[0016] Furthermore, this paper-plastic molding machine also includes a hot pressing and shaping station, wherein the upper mold assembly is located on the hot pressing and shaping station during at least one stroke of the moving component.

[0017] The present invention also provides a paper-plastic molding method using a paper-plastic molding machine, comprising the following steps;

[0018] S1. Control the suction and forming mold to descend and sink into the slurry pool, open the first suction component and draw slurry through the first air-liquid hole, so that the upper surface of the suction mold and its mold cavity surface form a wet blank in the shape of the mold cavity.

[0019] S2. Control the suction and forming mold to rise and expose the liquid surface of the slurry pool, and continuously turn on the first suction component to draw liquid through the first gas-liquid hole;

[0020] S3. The upper mold assembly is aligned with the lower mold for suction, and the mold groove covers the outer wall of the mold cavity;

[0021] S4. Control the second suction component to inflate the airbag. The airbag expands to squeeze and shape the wet blank. At the same time, the first suction component continuously draws liquid through the first gas-liquid hole to shape the wet blank while reducing the moisture content of the wet blank.

[0022] S5. Control the third suction component to draw in air, and use the negative pressure of the third gas-liquid hole and the second gas-liquid hole to adsorb the wet blank.

[0023] At the same time, the first suction component is controlled to blow air, which blows air into the inner wall of the wet blank through the first air-liquid hole, so that the wet blank is separated from the mold cavity;

[0024] S6. The moving component drives the upper mold component, which has been adsorbed with wet blanks, to move to the next station.

[0025] Furthermore, prior to step S3, the following steps are also included:

[0026] The upper mold assembly is aligned and brought closer to the lower mold for slurry suction, so that the lower wall of the air bladder is spaced from the upper wall of the wet blank. The third suction assembly is controlled to blow air through the third air-liquid hole and the second air-liquid hole to blow air onto the surface of the wet blank, so that the fine burrs on the surface of the wet blank adhere to the wet blank body.

[0027] The beneficial effects of the present invention are that the paper-plastic molding machine provided by the present invention, by adding an air bladder and adding a second air-liquid hole on the air bladder, ultimately achieves improved shaping effect of wet blank, reduced moisture content of wet blank, reduced burrs of wet blank, improved quality of wet blank, and the ability to transfer wet blank directly to the next processing step. Compared with conventional paper-plastic molding machines, the addition of only one air bladder and a second suction component in the structure has extremely high utilization rate and cost performance. Attached Figure Description

[0028] Appendix Figure 1 This is a schematic diagram of the first angle structure of the present invention;

[0029] Appendix Figure 2 This is a schematic diagram of the second angle structure of the present invention;

[0030] Appendix Figure 3 This is a front sectional view of the present invention;

[0031] Appendix Figure 4 For the appendix Figure 3 A magnified view of a section at point A in the middle;

[0032] Appendix Figure 5 This is a schematic diagram of the third angle structure after the hidden portion of the support of the present invention is shown;

[0033] Appendix Figure 6 This is a schematic diagram of the structure of the suction filter forming mold in this invention;

[0034] Appendix Figure 7 This is a diagram showing the combined state of the upper mold assembly and the suction lower mold in this invention.

[0035] Appendix Figure 8 For the appendix Figure 7 A magnified view of a section at point B.

[0036] In the figure, 1-Suction filtration forming device; 11-Slurry pool; 12-Suction filtration forming mold; 121-Suction lower mold; 1211-Mold cavity; 1212-First gas-liquid hole; 122-First suction assembly; 13-Lifting assembly; 14-Slurry guide hole; 2-Shaping and transfer device; 21-Moving assembly; 22-Upper mold assembly; 221-Upper mold; 2211-Mold groove; 22111-Third gas-liquid hole; 222-Airbag; 2221-Second gas-liquid hole; 223-Second suction assembly; 224-Third suction assembly; 3-Shaping cavity; 4-Hot pressing and shaping station; 5-Wet blank; 6-Support. Detailed Implementation

[0037] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0042] As attached Figure 1 -Appendix Figure 8 As shown, the present invention provides a paper-plastic forming machine, including a suction forming device 1 and a shaping and transfer device 2;

[0043] The suction forming device 1 includes a slurry tank 11 and a suction forming mold 12, which is raised and lowered within the slurry tank 11. The suction forming mold 12 includes a lower suction mold 121 and a first suction assembly 122. The upper surface of the lower suction mold 121 is provided with a plurality of upwardly protruding mold cavities 1211, and the outer surface of the mold cavities 1211 is provided with a plurality of first air-liquid holes 1212. The first suction assembly 122 is connected to the plurality of first air-liquid holes 1212. In specific operation, the slurry tank 11 is filled with slurry (a mixture of fiber and water). When the lower suction mold 121 is immersed in the slurry, the first suction assembly 122 draws air through the plurality of first air-liquid holes. Water is drawn from the slurry tank 11 by 1212. Under negative pressure, the water in the slurry tank 11 is discharged from the first air-liquid hole 1212. The remaining fibers are adsorbed onto the upper surface of the mold cavity 1211 and pre-formed into a wet blank 5 in the shape of the product. At the same time, slurry guide holes 14 are provided around the mold cavity 1211. Therefore, water around the mold cavity 1211 is discharged from the slurry lower mold 121 through the slurry guide holes 14. In actual production, multiple mold cavities 1211 can be arranged in a rectangular array to improve molding efficiency. In actual use, a metal mesh can also be provided on the upper wall of the mold cavity 1211, and the metal mesh covers the first air-liquid hole 1212 and the slurry guide hole 14.

[0044] The shaping and transfer device 2 includes a moving component 21 and an upper mold component 22 disposed on the output end of the moving component 21. The upper mold component 22 includes an upper mold 221, a second suction component 223, and a third suction component 224. The lower surface of the upper mold 221 is provided with a plurality of mold grooves 2211 corresponding to the mold cavity 1211. An air bladder 222 is provided on the lower inner wall of the mold groove 2211. The second suction component 223 communicates with the air bladder 222, and the air bladder 222 can be inflated and deflated by the second suction component 223, thereby expanding and contracting. The airbag 222 is provided with a plurality of second air-liquid holes 2221, and the inner wall of the mold groove 2211 is provided with a third air-liquid hole 22111. The third air-liquid hole 22111 corresponds one-to-one with the second air-liquid hole 2221, that is, the third air-liquid hole 22111 and the second air-liquid hole 2221 are interconnected. The third suction component 224 is connected to the plurality of third air-liquid holes 22111, so that the third suction component 224 can sequentially perform air extraction and air blowing operations in the mold cavity 1211 through the third air-liquid hole 22111 and the second air-liquid hole 2221.

[0045] The inner wall of the airbag 222 and the mold cavity 1211 form a molding cavity 3 to accommodate the wet blank 5. That is, the mold groove 2211 and the mold cavity 1211 respectively form a concave mold and a convex mold, which can cooperate with each other, and the wet blank 5 is located in the molding cavity 3.

[0046] The paper-plastic molding machine provided by this invention can complete the following paper-plastic molding method, including the following steps;

[0047] S1. Control the suction forming mold 12 to descend and sink into the pulp tank 11, open the first suction component 122 and draw the pulp through the first air-liquid hole 1212, so that the upper surface of the suction mold 121 and the surface of its mold cavity 1211 form a wet blank 5 in the shape of the mold cavity 1211. This step is the same as the conventional paper-plastic forming step.

[0048] S2. Control the suction forming mold 12 to rise and expose the liquid surface of the slurry pool 11, and continuously turn on the first suction component 122 to draw liquid through the first gas-liquid hole 1212. At this time, since the wet blank 5 has just been exposed outside the liquid surface, a large amount of water will remain on the wet blank 5, which can greatly reduce the water on the wet blank 5 and reduce the moisture content.

[0049] S3. The upper mold assembly 22 is aligned with the suction mold 121, and the mold groove 2211 covers the outer wall of the mold cavity 1211, that is, the mold groove 2211 covers the top of the wet blank 5 for mold closing.

[0050] S4. Control the second suction component 223 to inflate the airbag 222. The airbag 222 expands to squeeze and shape the wet blank 5, further improving the shaping effect of the wet blank 5. At the same time, since the airbag 222 is made of soft material, it will not damage the wet blank 5. During the squeezing and shaping process, the water between the fibers of the wet blank 5 can be squeezed out, further reducing the moisture content of the wet blank 5. Meanwhile, the first suction component 122 continuously draws liquid through the first air-liquid hole 1212, shaping the wet blank 5 while reducing its moisture content. The squeezed-out water is directly sucked away through the first air-liquid hole 1212.

[0051] S5. Control the third suction component 224 to suck in air, and use the third gas-liquid hole 22111 and the second gas-liquid hole 2221 to adsorb the wet blank 5 under negative pressure.

[0052] At the same time, the first suction component 122 is controlled to blow air, and air is blown into the inner wall of the wet blank 5 through the first air-liquid hole 1212, so that the wet blank 5 is separated from the mold cavity 1211.

[0053] At this time, the wet blank 5 is mainly adsorbed by the mold groove 2211.

[0054] S6. The moving component 21 drives the upper mold component 22, which has adsorbed the wet blank 5, to move to the next station, for example, to the hot pressing and shaping station 4 for hot pressing and shaping.

[0055] In this method, by adding an airbag 222, the shaping effect of the wet blank 5 can be greatly improved and the moisture content of the wet blank 5 can be reduced, solving various problems caused by the excessive moisture content of the wet blank 5. At the same time, the airbag 222 is provided with a second air-liquid hole 2221 that communicates with the third air-liquid hole 22111, so that the mold groove 2211 can adsorb the wet blank 5 for transfer, solving the problem of inability to transfer after adding the airbag 222.

[0056] In one embodiment, prior to step S3, the method further includes:

[0057] The upper mold assembly 22 is aligned and brought closer to the lower suction mold 121, creating a gap between the lower wall of the air bladder 222 and the upper wall of the wet blank 5. The third suction assembly 224 is then controlled to blow air through the third air-liquid hole 22111 and the second air-liquid hole 2221 onto the surface of the wet blank 5, causing the fine burrs on the surface of the wet blank 5 to adhere to the body of the wet blank 5. At this point, it is preferable not to inflate the air bladder 222, keeping it in a contracted state, thus allowing the second air-liquid hole 2221 to effectively ventilate. This step reduces the burrs on the wet blank 5 (fibers perpendicular to the body of the wet blank 5 during molding; if directly squeezed by the air bladder 222, the fibers will break, affecting quality), eliminates the irregular fine fibers on the wet blank 5 and its edges, making the perimeter of the wet blank 5 neater. Ultimately, this reduces flying debris and edge breakage.

[0058] The paper-plastic molding machine provided by this invention, by adding an airbag 222 and a second air-liquid hole 2221 on the airbag 222, ultimately improves the shaping effect of the wet blank 5, reduces the moisture content of the wet blank 5, reduces the burrs of the wet blank 5 and improves the quality of the wet blank, and can transfer the wet blank 5 directly to the next process. Compared with conventional paper-plastic molding machines, the addition of only one airbag 222 and a second suction component 223 to the structure has extremely high utilization rate and cost performance.

[0059] In one embodiment, the second gas-liquid hole 2221 and the first gas-liquid hole 1212 are arranged alternately so that when the first suction assembly 122 and the third suction assembly 224 perform suction and blowing on the wet blank 5, they act on different parts of the wet blank 5, thereby reducing the mass of the wet blank 5 at the same position.

[0060] In one embodiment, one side of the airbag 222 is bonded to the inner wall of the mold groove 2211, thereby ensuring the positional stability of the entire airbag 222 and causing the expansion and contraction of the airbag 222 to develop in a predetermined direction.

[0061] In one embodiment, when the second suction component 223 inflates the airbag 222, at least some of the diameters of the second gas-liquid holes 2221 are reduced, and at least some or even all of the second gas-liquid holes 2221 can be directly expanded and then blocked, thereby improving the shaping effect of the airbag 222 on the wet blank 5.

[0062] In one embodiment, a cylindrical support structure is provided on the inner wall of the second gas-liquid hole 2221 located at the central axis of the airbag 222. The cylindrical support structure can be a round tube adapted to the second gas-liquid hole 2221. When the second suction component 223 inflates the airbag 222, the diameter of the second gas-liquid hole 2221 located at the central axis of the airbag 222 remains unchanged, while the diameter of the other second gas-liquid holes 2221 becomes smaller and is blocked. At this time, before step S3, when the third suction component 224 blows air onto the surface of the wet blank 5 through the third gas-liquid hole 22111 and the second gas-liquid hole 2221, the gas is blown from the upper middle of the wet blank 5. The gas diffuses outward along the central axis of the wet blank 5 and flows through the gap between the inner wall of the airbag 222 and the outer wall of the wet blank 5, causing the burrs to be dispersed and tilted, which can also improve the burr removal effect. In this embodiment, before performing step S5, it is also necessary to control the second suction component 223 to deflate the airbag 222.

[0063] In one embodiment, the suction filtration forming device 1 further includes a lifting component 13, which drives the suction filtration forming mold 12 to move up and down along the height direction of the slurry pool 11, thereby immersing the lower suction mold 121 in the slurry or exposing it from the slurry.

[0064] In one embodiment, the moving component 21 is a horizontal reciprocating linear moving mechanism, and in at least one stroke, the upper mold component 22 is longitudinally aligned with the suction forming mold 12. Then, the lifting component 13 can drive the suction lower mold 121 to rise and align with the upper mold component 22 to close the film. After the wet blank 5 is transferred from the suction lower mold 121 to the upper mold component 22, the moving component 21 drives the upper mold component 22 to the next station for the next process, replacing the conventional manual transfer.

[0065] In one embodiment, the paper-plastic molding machine further includes a hot pressing and shaping station 4, wherein during at least one stroke of the moving component 21, the upper mold component 22 is located on the hot pressing and shaping station 4 to hot press and shape the wet blank 5.

[0066] In one embodiment, the suction filter forming device 1, the shaping and transfer device 2, and the 4-hot pressing shaping station are all fixed together by the bracket 6 so that the paper-plastic forming machine forms a whole.

[0067] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A paper-plastic forming machine, characterized by, The paper-plastic forming machine comprises a suction molding device (1) and a shaping and transferring device (2). The suction molding device (1) comprises a pulp tank (11) and a suction molding die (12) arranged in the pulp tank (11) in a lifting manner, the suction molding die (12) comprises a suction pulp lower die (121) and a first suction assembly (122), the upper surface of the suction pulp lower die (121) is provided with a plurality of upwardly protruding die cavities (1211), the outer surface of the die cavity (1211) is provided with a plurality of first gas-liquid holes (1212), and the first suction assembly (122) is connected with the plurality of first gas-liquid holes (1212). The shaping and transferring device (2) comprises a moving assembly (21) and an upper die assembly (22) arranged on the output end of the moving assembly (21), the upper die assembly (22) comprises an upper die (221), a second suction assembly (223) and a third suction assembly (224), the lower surface of the upper die (221) is provided with a plurality of die grooves (2211) corresponding to the die cavities (1211), the inner wall of the lower end of the die groove (2211) is provided with an air bag (222), the air bag (222) is provided with a plurality of second gas-liquid holes (2221), the inner wall of the die groove (2211) is provided with a third gas-liquid hole (22111), the third gas-liquid hole (22111) corresponds to the second gas-liquid hole (2221) in a one-to-one manner, the second suction assembly (223) is in communication with the air bag (222), and the third suction assembly (224) is in communication with the plurality of third gas-liquid holes (22111). The inner wall of the air bag (222) and the die cavity (1211) form a forming cavity (3) for accommodating a wet blank (5). The inner wall of the second gas-liquid hole (2221) located at the central axis of the air bag (222) is provided with a cylindrical support structure, when the second suction assembly (223) inflates the air bag (222), the diameter of the second gas-liquid hole (2221) located at the central axis of the air bag (222) remains unchanged, and the diameters of the remaining second gas-liquid holes (2221) become smaller or are blocked.

2. The paper plastic form, as claimed in claim 1, wherein, The second gas-liquid holes (2221) and the first gas-liquid holes (1212) are arranged alternately.

3. The paper plastic form, as claimed in claim 1, wherein, One side of the air bag (222) is adhesively connected with the inner wall of the die groove (2211).

4. A paper-plastic forming machine according to any one of claims 1-3, characterized in that The suction molding device (1) further comprises a lifting assembly (13), the lifting assembly (13) drives the suction molding die (12) to ascend and descend along the height direction of the pulp tank (11).

5. A paper-plastic forming machine as claimed in any one of claims 1-3, characterized in that The moving assembly (21) is a horizontal reciprocating linear moving mechanism, and in at least one stroke, the upper die assembly (22) is longitudinally aligned with the suction molding die (12).

6. The paper-plastic form, fill and seal machine of claim 5, wherein, The paper-plastic forming machine further comprises a hot-pressing shaping station (4), and in at least one stroke of the moving assembly (21), the upper die assembly (22) is located on the hot-pressing shaping station (4).

7. A paper-plastic molding method characterized by, The paper-plastic forming machine is used to perform the following steps. S1, control the suction filtration forming mold (12) to sink into the slurry pool (11), open the first suction assembly (122) and draw the slurry through the first gas-liquid hole (1212), so that the upper surface of the suction slurry lower mold (121) and the surface of the mold cavity (1211) form a wet blank (5) with the shape of the mold cavity (1211); S2, control the suction filtration forming mold (12) to rise out of the liquid surface of the slurry pool (11), and continuously open the first suction assembly (122) to draw liquid through the first gas-liquid hole (1212); S3, control the upper mold assembly (22) to align with the suction slurry lower mold (121), and the mold groove (2211) covers the outer wall of the mold cavity (1211); S4, control the second suction assembly (223) to inflate the air bag (222), the air bag (222) expands to extrude and shape the wet blank (5), and at the same time, the first suction assembly (122) continuously draws liquid through the first gas-liquid hole (1212), to shape the wet blank (5) while reducing the moisture content of the wet blank (5); S5, control the third suction assembly (224) to suck air, and through the third gas-liquid hole (22111) and the second gas-liquid hole (2221), the wet blank (5) is adsorbed; At the same time, control the first suction assembly (122) to blow air, blow air to the inner wall of the wet blank (5) through the first gas-liquid hole (1212), so that the wet blank (5) is separated from the mold cavity (1211); S6, the moving assembly (21) drives the upper mold assembly (22) with the wet blank (5) adsorbed to move to the next station.

8. The paper-plastic forming method according to claim 7, wherein the paper is formed into a sheet shape by a paper forming step, and the sheet-shaped paper is formed into a tubular shape by a paper tubularizing step. Before step S3, it also includes: Control the upper mold assembly (22) to align with the suction slurry lower mold (121) and close together, so that the lower wall of the air bag (222) has a gap with the upper wall of the wet blank (5), control the third suction assembly (224) to blow air, blow air to the surface of the wet blank (5) through the third gas-liquid hole (22111) and the second gas-liquid hole (2221), so that the fine burrs on the surface of the wet blank (5) are attached to the body of the wet blank (5).

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