CN117802833A - Paper-plastic forming machine and forming method thereof - Google Patents

Abstract

The invention belongs to the field of paper-plastic forming, and particularly relates to a paper-plastic forming machine and a forming method thereof, wherein the paper-plastic forming machine comprises a suction filtration forming device and a shaping transfer device; the suction filtration forming device comprises a pulp pool and a suction filtration forming die, the suction filtration forming die comprises a pulp suction lower die and a first suction assembly, the pulp suction lower die is provided with a die cavity, the outer surface of the die cavity is provided with a first gas-liquid hole, and the first suction assembly is connected with the first gas-liquid hole; the shaping transfer device comprises a moving assembly and an upper die assembly, wherein 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 cavity, the inner wall of the lower end of the die cavity is provided with an air bag, the air bag is provided with a second gas-liquid hole, and the inner wall of the die cavity is provided with a third gas-liquid hole.

Description

Paper-plastic forming machine and forming method thereof

Technical Field

The invention belongs to the field of paper-plastic forming, and particularly relates to a paper-plastic forming machine and a forming method thereof.

Background

In view of the harm of plastic products to the environment, there are developed products which are manufactured by mixing pulp fiber materials and/or plant fiber materials, pulping the pulp materials as pulp raw materials, absorbing the pulp by a pulp absorbing mold, adhering the pulp, and then performing hot press shaping technology, and are generally called paper plastic products, or also called molded products or pulp molded products, and are distinguished from plastic products in terms of names. The paper-plastic product has the advantages of easy recycling, reuse and manufacture, accords with the trend of environmental protection, reuse, energy conservation and carbon reduction, is rapidly accepted and is favored by the industry and the masses, and the paper-plastic product is frequently visible, for example: products such as bowls, plates, cup covers, packaging materials, shock absorbing materials, cushion materials and the like are increasingly adopted.

The paper-plastic product is basically manufactured through wet blank forming, hot press shaping, finished product transferring and end finishing, wherein the pulp sucking forming and the hot press shaping are the main manufacturing and shaping processes of the paper-plastic product, and generally the pulp sucking forming and the hot press shaping are completed through a paper-plastic product forming machine, and the finished product transferring and the end finishing are processes of collecting and transferring the finished product to the end finishing (such as trimming, checking and packaging) after the manufacturing and shaping of the paper-plastic product are completed. Therefore, it is known that the automatic paper-plastic product forming machine can be used for manufacturing the paper-plastic product with good quality only by providing an important pushing hand for manufacturing the paper-plastic product, and matching with a proper manufacturing method (process steps).

Taking the full-automatic plant fiber molding machine with a multifunctional auxiliary device as an example in Chinese patent CN201020283064.4, the paper molding machine at present has the following problems: 1. the surface of the formed wet blank is uneven easily, burrs are also easy to appear after the wet blank is hot-pressed and formed, and in the subsequent processing process, flying scraps are generated due to the existence of the burrs, so that the working environment is polluted. 2. The current wet blank has higher water content, and the burden of subsequent hot press shaping and the quality of finished products are increased.

Disclosure of Invention

The invention aims to solve the technical problem of providing a paper-plastic forming machine which can improve the shaping effect of a wet blank, reduce the moisture content of the wet blank, reduce burrs of the wet blank, improve the quality of the wet blank and transfer the wet blank to directly carry out the processing of the next process and a forming method thereof.

The invention provides a paper plastic forming machine, which comprises a suction filtration forming device and a shaping and transferring device;

the suction filtration forming device comprises a pulp tank and a suction filtration forming die which is arranged in the pulp tank in a lifting manner, wherein the suction filtration forming die comprises a pulp suction lower die and a first suction assembly, a plurality of upwardly protruding die cavities are formed in the upper surface of the pulp suction lower die, a plurality of first gas-liquid holes are formed in the outer surface of the die cavities, and the first suction assembly is connected with the plurality of first gas-liquid holes;

the shaping transfer device comprises a moving assembly and an upper die assembly arranged at the output end of the moving assembly, the upper die assembly comprises an upper die, a second suction assembly and a third suction assembly, a plurality of die grooves corresponding to the die cavities are formed in the lower surface of the upper die, air bags are arranged on the inner walls of the lower ends of the die grooves, a plurality of second air-liquid holes are formed in the air bags, third air-liquid holes are formed in the inner walls of the die grooves, the third air-liquid holes are in one-to-one correspondence with the second air-liquid holes, the second suction assembly is communicated with the air bags, and the third suction assembly is communicated with the plurality of third air-liquid holes;

a forming cavity for accommodating wet blanks is formed between the inner wall of the air bag and the die cavity.

Further, the second gas-liquid holes and the first gas-liquid holes are staggered.

Further, one side of the air bag is connected with the inner wall of the die cavity in an adhesive mode.

Further, at least a portion of the second gas-liquid orifice is reduced in diameter when the second pumping assembly inflates the balloon.

Further, a cylindrical supporting structure is arranged on the inner wall of the second gas-liquid hole at the central axis of the air bag, and the diameter of the second gas-liquid hole at the central axis of the air bag is unchanged when the air bag is inflated by the second suction assembly.

Still further, the suction filtration forming device further comprises a lifting assembly, and the lifting assembly drives the suction filtration forming die to lift along the height direction of the pulp tank.

Further, the moving component is a horizontal reciprocating linear moving mechanism, and in at least one stroke, the upper die component is longitudinally aligned with the suction filtration forming die.

Furthermore, the paper-plastic forming machine further comprises a hot press forming station, and the upper die assembly is positioned on the hot press forming station in at least one stroke of the moving assembly.

The invention also provides a paper-plastic forming method, which uses a paper-plastic forming machine and comprises the following steps of;

s1, controlling a suction filtration forming die to descend and sink into a slurry pool, starting a first suction assembly and sucking slurry through a first gas-liquid hole, so that the upper surface of a slurry suction lower die and the surface of a die cavity of the slurry suction lower die form a wet blank in the shape of the die cavity;

s2, controlling the suction filtration forming die to rise to expose out of the liquid level of the slurry tank, and continuously starting the first suction assembly to suck liquid through the first gas-liquid hole;

s3, controlling the upper die assembly to be aligned with the pulp suction lower die, and covering the outer wall of the die cavity by the die groove;

s4, controlling the second suction assembly to inflate the air bag, expanding the air bag to squeeze and shape the wet blank, and simultaneously, continuously sucking liquid through the first gas-liquid hole by the first suction assembly, and reducing the water content of the wet blank while shaping the wet blank;

s5, controlling the third suction assembly to suck air, and adsorbing the wet blank through the third gas-liquid hole and the second gas-liquid hole under negative pressure;

simultaneously controlling the first suction assembly to blow air, and blowing air to the inner wall of the wet blank through the first air-liquid hole to separate the wet blank from the die cavity;

s6, the moving assembly drives the upper die set with the wet blank to move to the next station.

Still further, before step S3, the method further includes:

the upper die assembly is controlled to be aligned with the pulp suction lower die and close to the pulp suction lower die, the lower wall of the air bag is separated from the upper wall of the wet blank, the third suction assembly is controlled to blow air, and the air is blown to the surface of the wet blank through the third air-liquid hole and the second air-liquid hole, so that tiny burrs on the surface of the wet blank are attached to the wet blank body.

The paper-plastic forming machine provided by the invention has the beneficial effects that the shaping effect of the wet blank is improved, the water content of the wet blank is reduced, the burrs of the wet blank are reduced, the quality of the wet blank is improved, the wet blank can be transferred to be directly processed in the next process, and compared with the conventional paper-plastic forming machine, the paper-plastic forming machine provided by the invention has the advantages that only one air bag and a second suction assembly are additionally arranged on structural parts, so that the paper-plastic forming machine has extremely high utilization rate and cost performance.

Drawings

FIG. 1 is a schematic view of a first angle structure of the present invention;

FIG. 2 is a schematic view of a second angle structure of the present invention;

FIG. 3 is a front cross-sectional view of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic view of a third angle structure of the present invention after hiding a portion of the bracket;

FIG. 6 is a schematic diagram of a suction filtration molding die according to the present invention;

FIG. 7 is a diagram showing the state of the upper die assembly and the pulp suction lower die in the invention;

fig. 8 is a partial enlarged view at B in fig. 7.

In the figure, a 1-suction filtration molding device; 11-a slurry tank; 12-suction filtration forming die; 121-a pulp suction lower die; 1211-a mold cavity; 1212-a first gas-liquid aperture; 122-a first pumping assembly; 13-a lifting assembly; 14-slurry diversion holes; 2-shaping and transferring device; 21-a movement assembly; 22-upper die assembly; 221-upper die; 2211-a die cavity; 22111-a third gas-liquid hole; 222-an air bag; 2221-second gas-liquid pores; 223-a second pumping assembly; 224-a third pumping assembly; 3-forming a cavity; 4-a hot press shaping station; 5-wet blank; 6-bracket.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the device can be mechanically connected, electrically connected, physically connected or wirelessly connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

As shown in fig. 1-8, the invention provides a paper-plastic forming machine, which comprises a suction filtration forming device 1 and a shaping and transferring device 2;

the suction filtration molding device 1 comprises a pulp tank 11 and a suction filtration molding die 12 arranged in the pulp tank 11 in a lifting manner, wherein the suction filtration molding die 12 comprises a pulp suction lower die 121 and a first suction component 122, a plurality of upwardly protruding die cavities 1211 are arranged on the upper surface of the pulp suction lower die 121, a plurality of first air holes 1212 are arranged on the outer surface of the die cavities 1211, the first suction component 122 is connected with the plurality of first air holes 1212, in a concrete working manner, pulp (mixture of fibers and water) is contained in the pulp tank 11, when the pulp suction lower die 121 is immersed in pulp, the first suction component 122 is used for sucking the water in the pulp tank 11 through the plurality of first air holes 1212, the water in the pulp tank 11 is discharged from the first air holes 1212 under the action of negative pressure, the rest fibers are adsorbed on the upper surface of the die cavities 1211 to form wet blanks 5 in the shape of products, and meanwhile, pulp guide holes 14 are arranged at the surrounding positions of the die cavities 1211, so that when the water at the surrounding positions of the holes of the die cavities 1211 is discharged through the pulp guide holes 14, the pulp guide holes are arranged in a concrete shape of the die cavities 121, the array can be improved; in particular use, a metal mesh can also be provided on the upper wall of the mold cavity 1211 and cover the first gas-liquid aperture 1212 and the slurry deflector aperture 14.

The shaping and transferring device 2 comprises a moving assembly 21 and an upper die assembly 22 arranged at 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 cavity 1211, the inner wall of the lower end of the die groove 2211 is provided with an air bag 222, the second suction assembly 223 is communicated with the air bag 222, the air bag 222 can be inflated and deflated through the second suction assembly 223, and further can be inflated and deflated, the air bag 222 is provided with a plurality of second air-liquid holes 2221, the inner wall of the die groove 2211 is provided with third air-liquid holes 22111, the third air-liquid holes 22111 are in one-to-one correspondence with the second air-liquid holes 2221, namely, the third air-liquid holes 22111 are mutually communicated with the second air-liquid holes 2221, the third suction assembly 224 is communicated with the plurality of third air-liquid holes 22111, and the third suction assembly 224 can sequentially blow air through the third air-liquid holes 22111 and the second air-liquid holes 2221;

a forming cavity 3 for accommodating the wet blank 5 is formed between the inner wall of the air bag 222 and the die cavity 1211, that is, the die cavity 2211 and the die cavity 1211 respectively form a female die and a male die, which can be matched with each other, and the wet blank 5 is located in the forming cavity 3.

The paper-plastic forming machine provided by the invention can be used for completing the following paper-plastic forming method, and comprises the following steps of;

s1, controlling the suction filtration forming die 12 to descend and sink into the pulp tank 11, starting the first suction assembly 122 and sucking pulp through the first gas-liquid hole 1212, so that the upper surface of the pulp suction lower die 121 and the surface of the die cavity 1211 form a wet blank 5 in the shape of the die cavity 1211, wherein the step is the same as the conventional paper-plastic forming step;

s2, controlling the suction filtration forming die 12 to rise to expose outside the liquid level of the pulp tank 11, and continuously starting the first suction assembly 122 to suck liquid through the first gas-liquid hole 1212, wherein at the moment, a large amount of water is remained on the wet blank 5 because the wet blank 5 just exposes outside the liquid level, so that the water on the wet blank 5 can be greatly reduced, and the water content is reduced;

s3, controlling the upper die assembly 22 to be aligned with the pulp suction lower die 121, and covering the outer wall of the die cavity 1211 by a die cavity 2211, namely covering the upper side of the wet blank 5 by the die cavity 2211 for die assembly;

s4, controlling the second suction assembly 223 to inflate the air bag 222, and expanding the air bag 222 to squeeze and shape the wet blank 5, so that the shaping effect of the wet blank 5 is further improved, meanwhile, the air bag 222 is made of soft materials, so that the wet blank 5 is not damaged, water among fibers of the wet blank 5 can be further squeezed out in the squeezing and shaping process, the water content of the wet blank 5 is further reduced, meanwhile, the first suction assembly 122 continuously pumps liquid through the first gas-liquid holes 1212, the water content of the wet blank 5 is reduced while the wet blank 5 is shaped, and the squeezed water is directly sucked away through the first gas-liquid holes 1212;

s5, controlling the third suction component 224 to suck air, and absorbing the wet blank 5 through the third gas-liquid hole 22111 and the second gas-liquid hole 2221 under negative pressure;

simultaneously controlling the first suction assembly 122 to blow air, and blowing air to the inner wall of the wet blank 5 through the first air-liquid hole 1212 to separate the wet blank 5 from the mold cavity 1211;

at this time, the wet blank 5 is mainly sucked by the die groove 2211.

S6, the moving assembly 21 drives the upper die assembly 22 with the wet blank 5 to move to the next station, for example, the hot press shaping station 4 for hot press shaping.

In the method, the shaping effect of the wet blank 5 can be greatly improved and the water content of the wet blank 5 can be reduced by additionally arranging the air bag 222, so that various problems caused by overhigh water content of the wet blank 5 at present can be solved, and meanwhile, the air bag 222 is provided with the second gas-liquid holes 2221 communicated with the third gas-liquid holes 22111, so that the die cavity 2211 can adsorb the wet blank 5 for transferring, and the problem that the wet blank 5 cannot be transferred after the air bag 222 is additionally arranged can be solved.

In one embodiment, before step S3, the method further includes:

the upper die assembly 22 and the pulp suction lower die 121 are controlled to be closed to Ji Bingkao, the lower wall of the air bag 222 and the upper wall of the wet blank 5 are separated, the third suction assembly 224 is controlled to blow air, the air is blown to the surface of the wet blank 5 through the third air-liquid hole 22111 and the second air-liquid hole 2221, and tiny burrs on the surface of the wet blank 5 are attached to the body of the wet blank 5, at the moment, the air bag 222 is preferably not inflated, the air bag 222 is in a contracted state, the second air-liquid hole 2221 can be effectively ventilated, in the step, burrs of the wet blank 5 (fibers vertical to the body of the wet blank 5 in the forming process can be reduced, if the fibers are directly extruded through the air bag 222, the quality is affected), the tiny fibers of the wet blank 5 and the uneven edges of the wet blank 5 are eliminated, and the periphery of the wet blank 5 is tidier. And finally, the flying scraps and the edge frying are reduced.

Namely, according to the paper-plastic forming machine provided by the invention, the shaping effect of the wet blank 5 is improved, the water content of the wet blank 5 is reduced, burrs of the wet blank 5 are reduced, the quality of the wet blank is improved, the wet blank 5 can be transferred to be directly processed in the next process, and compared with the conventional paper-plastic forming machine, only one air bag 222 and a second suction assembly 223 are additionally arranged on structural parts, so that the paper-plastic forming machine has extremely high utilization rate and cost performance.

In one embodiment, the second gas-liquid holes 2221 and the first gas-liquid holes 1212 are staggered, so as to act on different portions of the wet blank 5 when the first pumping assembly 122 and the third pumping assembly 224 pump and blow the wet blank 5, thereby reducing the quality of the same position of the wet blank 5.

In one embodiment, one side of the balloon 222 is adhesively connected to the inner wall of the cavity 2211, so as to ensure the positional stability of the entire balloon 222, such that the expansion and contraction of the balloon 222 progresses toward a set direction.

In one embodiment, when the second pumping unit 223 inflates the air bag 222, at least part of the second air-liquid holes 2221 have a reduced diameter, and at least part or even all of the second air-liquid holes 2221 may be plugged after being directly inflated, so as to improve the shaping effect of the air bag 222 on the wet blank 5.

In one embodiment, 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 supporting structure, the cylindrical supporting structure may be a round tube adapted to the second gas-liquid hole 2221, when the air bag 222 is inflated by the second suction component 223, the diameter of the second gas-liquid hole 2221 located at the central axis of the air bag 222 is unchanged, and the diameters of the remaining second gas-liquid holes 2221 are reduced to be blocked, at this time, before step 3, when the third suction component 224 blows air to the surface of the wet blank 5 through the third gas-liquid hole 22111 and the second gas-liquid hole 2221, the air is blown from the middle of the upper part of the wet blank 5, and the air is spread outwards along the central axis of the wet blank 5, and flows through the gap between the inner wall of the air bag 222 and the outer wall of the wet blank 5, so that the burrs are dispersed to be dumped, and the burr eliminating effect can be improved. In this embodiment, the second pumping assembly 223 is also required to be controlled to deflate the balloon 222 before proceeding to step S5.

In one embodiment, the suction filtration molding device 1 further includes a lifting assembly 13, and the lifting assembly 13 drives the suction filtration molding die 12 to lift along the height direction of the slurry tank 11, so that the lower slurry suction die 121 is immersed in the slurry or exposed to the slurry.

In one embodiment, 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 filtration forming die 12, so that the lifting assembly 13 can drive the suction lower die 121 to lift up to be aligned with the upper die assembly 22 and to perform film combination, and after the wet blank 5 is transferred from the suction lower die 121 to the upper die assembly 22, the moving assembly 21 drives the upper die assembly 22 to perform the next working procedure to the next working station, instead of the conventional manual transfer.

In one embodiment, the paper-plastic forming machine further comprises a hot press forming station 4, and the upper die assembly 22 is located on the hot press forming station 4 in at least one stroke of the moving assembly 21 to perform hot press forming on the wet blank 5.

In one embodiment, the suction filtration molding device 1, the shaping transfer device 2 and the 4-hot press shaping station are all fixed together through the bracket 6, so that the paper molding machine forms a whole.

What is not described in detail in this specification is prior art known to those skilled in the art.

Claims (10)

1. The paper-plastic forming machine is characterized by comprising a suction filtration forming device (1) and a shaping and transferring device (2);

the suction filtration forming device (1) comprises a pulp tank (11) and a suction filtration forming die (12) which is arranged in the pulp tank (11) in a lifting manner, the suction filtration forming die (12) comprises a pulp suction lower die (121) and a first suction assembly (122), a plurality of upwardly protruding die cavities (1211) are arranged on the upper surface of the pulp suction lower die (121), a plurality of first gas-liquid holes (1212) are formed in the outer surface of the die cavities (1211), and the first suction assembly (122) is connected with the plurality of first gas-liquid holes (1212);

the shaping transfer device (2) comprises a moving assembly (21) and an upper die assembly (22) arranged at 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), a plurality of die grooves (2211) corresponding to the die cavities (1211) are formed in the lower surface of the upper die (221), an air bag (222) is arranged on the inner wall of the lower end of the die grooves (2211), a plurality of second air-liquid holes (2221) are formed in the air bag (222), third air-liquid holes (22111) are formed in the inner wall of the die grooves (2211), the third air-liquid holes (22111) are in one-to-one correspondence with the second air-liquid holes (2221), the second suction assembly (223) is communicated with the air bag (222), and the third suction assembly (224) is communicated with the plurality of third air-liquid holes (22111);

a molding cavity (3) for accommodating a wet blank (5) is formed between the inner wall of the air bag (222) and the mold cavity (1211).

2. The paper-plastic forming machine of claim 1, wherein the second gas-liquid holes (2221) and the first gas-liquid holes (1212) are staggered.

3. The machine of claim 1, wherein one side of the bladder (222) is adhesively attached to the inner wall of the cavity (2211).

4. The machine of claim 1, wherein at least a portion of the second gas-liquid holes (2221) are reduced in diameter when the second suction assembly (223) inflates the bladder (222).

5. The machine according to claim 4, wherein 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, and the diameter of the second gas-liquid hole (2221) located at the central axis of the air bag (222) is unchanged when the air bag (222) is inflated by the second suction assembly (223).

6. A paper-plastic forming machine as claimed in any one of claims 1-5, characterized in that the suction filtration forming device (1) further comprises a lifting assembly (13), the lifting assembly (13) driving the suction filtration forming die (12) to lift in the height direction of the pulp tank (11).

7. A machine as claimed in any one of claims 1 to 5, wherein said moving assembly (21) is a horizontally reciprocating linear moving mechanism and said upper die assembly (22) is longitudinally aligned with said suction filtration forming die (12) during at least one stroke.

8. The machine of claim 7, further comprising a thermo-compression molding station (4), wherein the upper die assembly (22) is located on the thermo-compression molding station (4) during at least one stroke of the moving assembly (21).

9. A paper-plastic forming method, characterized in that the paper-plastic forming machine according to any one of claims 1-8 is used, comprising the steps of;

s1, controlling a suction filtration forming die (12) to descend and sink into a slurry pool (11), starting a first suction assembly (122) and sucking slurry through a first gas-liquid hole (1212), so that the upper surface of a slurry suction lower die (121) and the surface of a die cavity (1211) of the slurry suction lower die form a wet blank (5) in the shape of the die cavity (1211);

s2, controlling the suction filtration forming die (12) to rise to be exposed out of the liquid level of the slurry tank (11), and continuously starting the first suction assembly (122) to suck liquid through the first gas-liquid hole (1212);

s3, controlling the upper die assembly (22) to be aligned with the pulp suction lower die (121), and covering the outer wall of the die cavity (1211) by a die groove (2211);

s4, controlling the second suction assembly (223) to inflate the air bag (222), enabling the air bag (222) to expand to squeeze and shape the wet blank (5), enabling the first suction assembly (122) to continuously suck liquid through the first gas-liquid hole (1212), shaping the wet blank (5), and reducing the water content of the wet blank (5);

s5, controlling the third suction component (224) to suck air, and absorbing the wet blank (5) through the third gas-liquid hole (22111) and the second gas-liquid hole (2221) under negative pressure;

simultaneously controlling the first suction assembly (122) to blow air, and blowing air to the inner wall of the wet blank (5) through the first air-liquid hole (1212) to separate the wet blank (5) from the die cavity (1211);

s6, the moving assembly (21) drives the upper die assembly (22) with the wet blank (5) absorbed to move to the next station.

10. The paper-plastic forming method as claimed in claim 9, further comprising, before step S3:

the upper die assembly (22) is controlled to be aligned with the pulp suction lower die (121) and close, the lower wall of the air bag (222) is separated from the upper wall of the wet blank (5), the third suction assembly (224) is controlled to blow air, and the air is blown to the surface of the wet blank (5) through the third air-liquid hole (22111) and the second air-liquid hole (2221), so that tiny burrs on the surface of the wet blank (5) are attached to the body of the wet blank (5).