Mold and paper pulp molding preparation method

Abstract

The invention relates to the technical field of material forming, in particular to a mold and a paper pulp molding preparation method. The mold comprises a first mold body and a second mold body, a first mold body cavity is formed in the first mold body, a second mold body cavity is formed in the second mold body, and one of the first mold body and the second mold body is configured to be close to the other one in an operable mode. The first mold body cavity and the second mold body cavity are matched with each other to jointly form a mold cavity for accommodating paper pulp and forming a product shape, and a gap is formed between the edge of the first mold body cavity and the edge of the second mold body cavity under the condition that the first mold body and the second mold body are closed; a movable sliding block is arranged between the first die body and the second die body, and the sliding block is used for extruding paper pulp overflowing from the gap to form a curled edge under the condition that the first die body and the second die body are closed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of material forming, and particularly relates to a mold and a paper pulp molding preparation method. BACKGROUND

[0002] In the field of notebook computer packaging, paper-plastic cushioning is an important choice for replacing traditional foam cushioning materials due to its environmental protection, biodegradability and certain cushioning performance, and is widely used in the packaging structure of notebook computers to effectively protect the products during transportation, storage and handling.

[0003] However, the current paper-plastic cushioning still faces problems such as difficulty in balancing appearance quality and protection performance, and challenges in cost control during production and application. Specifically, in the forming link of paper-plastic cushioning, the edges of the formed paper-plastic cushioning will be folded, and the folding length cannot be uniform, showing a random state, which seriously affects the user experience of consumers. SUMMARY

[0004] The present disclosure provides a mold and a paper pulp molding preparation method to at least solve the above technical problems in the prior art.

[0005] The first aspect of the present disclosure provides a mold, comprising:

[0006] a first mold body and a second mold body, the first mold body is formed with a first mold cavity, the second mold body is formed with a second mold cavity, and the first mold body and the second mold body are butted, and the first mold cavity and the second mold cavity cooperate with each other to form a mold cavity for accommodating paper pulp and forming a product shape;

[0007] In the case that the first mold body and the second mold body are closed, the edge of the first mold cavity towards the second mold body and the edge of the second mold cavity towards the first mold body have a gap therebetween;

[0008] a sliding block is arranged between the first mold body and the second mold body, the sliding block is in sliding cooperation with one of the first mold body and the second mold body, the sliding block is arranged opposite to the gap, and is used for extruding the paper pulp overflowing from the gap to form a rolled edge in the case that the first mold body and the second mold body are closed.

[0009] Further, a driving member is arranged, a driving end of the driving member is connected with the sliding block, and the driving member is used for driving the sliding block to move towards the direction of approaching or moving away from the gap.

[0010] Further, a travel switch is arranged, the travel switch is triggered by the first mold body, the travel switch is switched to a first state, and the driving member drives the sliding block to move towards the direction of approaching the gap to extrude the overflowing paper pulp.

[0011] Further, the second mold body is formed with a mounting groove, and the sliding block is arranged in the mounting groove.

[0012] The surface of the sliding block facing the gap is provided with a protruding part, and the extending direction of the protruding part is consistent with the extending direction of the gap.

[0013] Further, the surface of the protruding part close to the gap is formed with a recessed part.

[0014] Further, when the first mold body and the second mold body are closed, a cavity is formed between the first mold body and the second mold body, the sliding block is arranged in the cavity, and the gap is in communication with the cavity.

[0015] Further, the number of the sliding blocks is two, and the two sliding blocks are arranged on the two sides of the mold cavity respectively.

[0016] Further, the number of the sliding blocks is multiple, and the multiple sliding blocks are arranged around the mold cavity respectively.

[0017] The second aspect of the present disclosure provides a paper pulp molding preparation method using the mold of the first aspect, comprising the steps of:

[0018] Placing the paper pulp wet embryo into the second mold cavity of the second mold body;

[0019] Closing the first mold body and the second mold body;

[0020] Continuously heating and pressurizing by the first mold body;

[0021] After heating and pressurizing for a first set period of time to make part of the water in the paper pulp flow out from the gap, the sliding block moves towards the gap direction, extrudes the paper pulp overflowing from the gap and pressurizes for a second set period of time;

[0022] Opening the mold after the second mold body is depressurized.

[0023] Further, the method further comprises the steps of:

[0024] After the first mold body and the second mold body are closed, the first mold body touches the travel switch, the travel switch is switched to a first state, the driving member drives the sliding block to move towards the direction close to the gap to extrude the overflowing paper pulp;

[0025] After the second mold body is depressurized, the travel switch is switched to a second state, and the driving member drives the sliding block to move away from the gap.

[0026] Compared with the prior art, the technical scheme provided by the embodiment of the present disclosure has the following advantages:

[0027] The mold provided by the embodiment of the present disclosure comprises a first mold body and a second mold body, the first mold body is formed with a first mold cavity, the second mold body is formed with a second mold cavity, one of the first mold body and the second mold body is configured to be operable to move close to the other, so that the first mold cavity and the second mold cavity are matched to jointly form a mold cavity for containing pulp and forming a product shape; in the case that the first mold body and the second mold body are closed, there is a gap between the edge of the first mold cavity and the edge of the second mold cavity; a movable slider is arranged between the first mold body and the second mold body, and the slider is used to extrude the pulp overflowing from the gap to form a curled edge in the case that the first mold body and the second mold body are closed.

[0028] The embodiment of the present disclosure can effectively process the excess part of the pulp generated in the molding process by arranging the movable slider to extrude the pulp overflowing from the gap when the mold is closed. The problem of uneven length of the paper pulp edge and the curled edge caused by the mold extrusion in the traditional process is solved, so that the edge of the finally molded paper plastic buffer packaging is more regular and smooth, and the curled edge and the paper pulp edge with random length no longer appear, which greatly improves the delicate appearance of the product. The slider extrudes the pulp overflowing from the gap to form a paper plastic buffer edge part when the mold is closed, and the paper plastic buffer edge part can maintain the original material strength and structural integrity after molding. In the links of product transportation, storage and handling, the edge part of the notebook computer can be better protected, the risk of damage to the product due to insufficient protection of the edge part is effectively reduced, and the overall protection performance is improved.

[0029] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which:

[0031] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0032] Figure 1 A structural schematic diagram of a mold provided by an embodiment of the present disclosure is shown;

[0033] Figure 2 A structural schematic diagram of a mold provided by an embodiment of the present disclosure is shown;

[0034] Figure 3 A structural schematic diagram of a mold provided by an embodiment of the present disclosure is shown;

[0035] Figure 4 for Figure 3 Enlarged view of point a in the middle;

[0036] Figure 5 A schematic diagram of the structure of the first and second phantoms before they are closed is shown;

[0037] Figure 6 A schematic diagram of the structure after the first and second phantoms are closed is shown;

[0038] Figure 7 A schematic diagram of the slider compression structure after the first and second molds are closed is shown;

[0039] Figure 8 A schematic diagram of the structure after the slider is extruded is shown;

[0040] Figure 9 A flowchart of a pulp molding preparation method provided in an embodiment of this disclosure is shown.

[0041] The following are the labels in the diagram: 1. First mold body; 2. Second mold body; 21. Mounting groove; 22. Gap; 3. Slider; 31. Protrusion; 311. Recess; 4. Drive component; 5. Limit switch; 6. Cavity; 7. Product; 71. Edge curl. Detailed Implementation

[0042] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure 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 this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0043] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the mold provided in this embodiment includes a first mold body 1 and a second mold body 2. The first mold body 1 has a first mold cavity, and the second mold body 2 has a second mold cavity. One of the first mold body 1 and the second mold body 2 is configured to move closer to the other so that the first mold cavity and the second mold cavity cooperate to form a mold cavity that contains pulp and forms the shape of product 7. That is, after the first mold body (1) and the second mold body (2) are connected, the first mold cavity and the second mold cavity cooperate to form a mold cavity that contains pulp and forms the shape of product (7).

[0044] In the case that the first mold body 1 and the second mold body 2 are closed, there is a gap 22 between the edge of the first mold body cavity close to the second mold body and the edge of the second mold body cavity close to the first mold body; a sliding block 3 is arranged between the first mold body 1 and the second mold body 2, which is in sliding fit with one of the first mold body 1 and the second mold body 2, and is used to extrude the overflowed paper pulp from the gap 22 to form a hem 71 in the case that the first mold body 1 and the second mold body 2 are closed.

[0045] The embodiment of the present disclosure can effectively process the excess part of the paper pulp generated in the forming process by arranging the movable sliding block 3 to extrude the overflowed paper pulp from the gap 22 when the mold is closed. The problem of uneven length of the paper pulp burr and the hem caused by the extrusion of the mold in the traditional process is solved, so that the edge of the finally formed paper plastic buffer packaging is more regular and smooth, and the hem and burr of random length no longer appear, which greatly improves the delicate appearance of the product 7. The sliding block 3 extrudes the overflowed paper pulp from the gap 22 to form a paper plastic buffer edge part when the mold is closed, and the paper plastic buffer edge part can maintain the original strength and structural integrity of the material after forming. In the transportation, storage and handling links of the product 7, the edge part of the notebook computer can be better protected, the risk of damage to the product 7 due to insufficient protection of the edge part is effectively reduced, and the overall protection performance is improved.

[0046] The embodiment adds a transversely extruding sliding block 3 to the original hot-pressing mold, and the operation process is synchronously performed on the original steps without increasing an additional process. The paper plastic bulk production will not increase the cost of paper plastic, and the required hem 71 thickness can be obtained by setting the fixed height of the sliding block 3.

[0047] In some specific embodiments, the mold further comprises a driving member 4, which can be arranged on the second mold body 2, and the driving end of the driving member 4 is connected with the sliding block 3 for driving the sliding block 3 to move towards or away from the gap 22. This design enables the lateral extrusion action to be integrated into the original hot-pressing process without additional processes, avoiding the cost increase caused by an additional process like the edge cutting process, which is conducive to controlling the cost in bulk production.

[0048] In addition, the sliding block 3 extrudes the overflowed paper pulp to form a hem 71 under the action of the driving member 4, so that the paper plastic buffer edge forms a double-layer structure. Unlike the edge cutting process which cuts off the burr to cause the edge to be weak, this double-layer hem 71 structure enhances the strength and hardness of the edge, improves the protection performance of the edge of the product 7, and avoids the problem of decreased protection performance.

[0049] In addition, the driving member 4 drives the sliding block 3 in a flexible and controllable manner. By adjusting parameters such as driving force and moving speed of the driving member 4, the driving member 4 can adapt to the needs of the edge 71 of different paper-plastic buffer products 7, has good process adaptability, and can meet diversified production requirements.

[0050] Optionally, the driving member 4 can be a pneumatic cylinder or an oil cylinder. The cylinder body of the pneumatic cylinder or the oil cylinder is connected with the second mold body 2, and the telescopic end of the pneumatic cylinder or the oil cylinder is connected with the sliding block 3.

[0051] In some specific embodiments, a travel switch 5 is further included, which can be installed on the second mold body 2. In response to the first mold body 1 touching the travel switch 5, the travel switch 5 is switched to a first state, and the driving member 4 drives the sliding block 3 to move towards the gap 22 to extrude the overflowed paper pulp. After the first mold body 1 touches the travel switch 5, the travel switch 5 is switched and triggers the driving member 4 to act, so that the time when the sliding block 3 starts to extrude can be strictly controlled.

[0052] Optionally, after the sliding block 3 is pressurized for 5s, about 60% to 70% of the water in the blank is discharged. At this time, the water content of the blank is most suitable for folding and flanging, which can ensure that the sliding block 3 extrudes when the paper-plastic buffer blank is in the best state, avoid affecting the adhesion effect of the two layers of paper-plastic due to the over-drying of the blank, or affecting the drainage efficiency or even causing the paper-plastic to break due to over-wetting, and ensure the quality of the edge 71.

[0053] In some specific embodiments, the second mold body 2 is formed with a mounting groove 21, and the sliding block 3 is arranged in the mounting groove 21. The mounting groove 21 provides a stable mounting space and movement guide for the sliding block 3. When the driving member 4 drives the sliding block 3 to move towards or away from the gap 22, the mounting groove 21 can effectively limit the movement track of the sliding block 3, avoid the sliding block 3 from deviating or shaking during the extrusion process, and ensure that the sliding block 3 always moves accurately along the preset direction, thereby providing a reliable guarantee for stable extrusion of the overflowed paper pulp.

[0054] The surface of the sliding block 3 towards the gap 22 is provided with a protruding portion 31. The extension direction of the protruding portion 31 is consistent with the extension direction of the gap 22. When the sliding block 3 moves towards the gap 22 under the action of the driving member 4, the protruding portion 31 can concentrate the force on the paper pulp overflowing from the gap 22, and can better roll the raw edge into the inside, thereby further improving the delicacy of the appearance of the paper-plastic buffer.

[0055] By designing the height and shape of the protruding portion 31, the moving distance and extrusion degree of the sliding block 3 can be controlled in the embodiment, so that the thickness of the edge 71 formed by the extrusion of the paper pulp overflowing from the gap 22 is uniform, and the specifications are unified, thereby solving the problem of random flange length in the existing flanging process, and ensuring the delicacy of the appearance of the paper-plastic buffer.

[0056] If the specified thickness of the curling edge 71 needs to be specified, the height of the slide convex part 31 can be directly adjusted.

[0057] In some specific embodiments, the convex part 31 is formed with a recess 311 near the surface of the gap 22. The recess 311 can provide a specific accommodation space for the pulp during the extrusion of the pulp overflow. The space formed by the recess 311 can have a wrapping extrusion effect on the burr, so that the burr that may otherwise be exposed is completely accommodated in the curling edge 71 structure, allowing the double-layer paper plastic of the curling edge 71 to better fit. The shape and size of the recess 311 can guide the overflowed pulp to fold and curl in a predetermined shape, further improving the consistency of the thickness and the stability of the structure of the curling edge 71, and avoiding irregularities in the shape of the curling edge 71.

[0058] In some specific embodiments, when the first mold body 1 and the second mold body 2 are closed, a cavity 6 is formed between the first mold body 1 and the second mold body 2, and the slide block 3 is arranged in the cavity 6, and the gap 22 is in communication with the cavity 6. Since the slide block 3 is located in the cavity 6, its movement path is closer to the position where the pulp overflows, and it can quickly and accurately act on the overflowed pulp. The extrusion of the slide block 3 on the overflowed pulp in the cavity 6 forms a double-layer curling edge 71, which enhances the strength and hardness of the paper plastic buffer edge, and solves the problem of weak edge caused by the cutting edge process and the decline in protection performance.

[0059] In some specific embodiments, the number of slide blocks 3 is two, and the two slide blocks 3 are arranged on both sides of the mold cavity. The synchronous extrusion of the two slide blocks 3 on both sides can ensure that the curling edges 71 on both sides of the paper plastic buffer are uniformly stressed and have consistent shapes during the forming process, avoiding problems such as uneven thickness and asymmetric shape of the curling edge 71 that may be caused by unilateral extrusion.

[0060] In some specific embodiments, the number of slide blocks 3 is multiple, and the multiple slide blocks 3 are arranged around the mold cavity. The four slide blocks 3 can ensure that the curling edges 71 around the paper plastic buffer have uniform thickness and consistent shape, and the burrs that may otherwise exist are completely rolled inside, solving the problem of random edge turn length and obvious burrs in the traditional forming process.

[0061] Figure 5 A structure schematic diagram of the first mold body 1 and the second mold body 2 before being closed is shown; Figure 6 A structure schematic diagram of the first mold body 1 and the second mold body 2 after being closed is shown; Figure 7 An extrusion process schematic diagram of the slide block 3 moving towards the gap 22 after the first mold body 1 and the second mold body 2 are closed is shown; Figure 8 A structure schematic diagram of the product 7 forming the curling edge 71 after the slide block 3 is extruded is shown; Figure 9 A flowchart of the pulp molding preparation method provided by the embodiments of the present disclosure is shown.

[0062] In combination Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown in the paper pulp molding preparation method provided by the embodiments of the present disclosure, the mold provided by the embodiments of the present disclosure comprises the following steps: placing the paper pulp wet embryo into the second mold cavity of the second mold body 2; closing the mold by combining the first mold body 1 with the second mold body 2; continuously heating and pressurizing by the first mold body 1; after the partial water of the paper pulp is discharged from the gap 22 for a first set period of time, moving the sliding block 3 towards the gap 22 direction, extruding the paper pulp overflowing from the gap 22 and pressurizing for a second set period of time; and opening the mold after the second mold body 2 is depressurized.

[0063] In the embodiments, moving the sliding block 3 towards the gap 22 direction, extruding the paper pulp overflowing from the gap 22 and pressurizing for a second set period of time can ensure that the edge folding 71 operation is performed when the paper pulp wet embryo is in the best state, guarantee the adhesion effect and forming quality of the edge folding 71, and further improve the overall performance of the paper plastic buffer.

[0064] The paper pulp molding preparation method provided by the embodiments of the present disclosure can realize the thickness control of the edge folding 71, unify the edge thickness of the entire paper plastic buffer, and be very beautiful and delicate. All the burrs can be directly rolled into the inside, and the burrs cannot be seen on the appearance of the paper plastic buffer, thereby improving the user's unpacking experience.

[0065] In addition, the paper pulp molding preparation method provided by the embodiments of the present disclosure can directly roll the excess burrs on both sides of the paper plastic buffer into the inside during the forming, and can roll the edge into double-layer paper plastic. While guaranteeing the aesthetics, the protection performance of the edge on both sides of the paper plastic buffer can be greatly improved.

[0066] In some specific embodiments, the method further comprises the following steps:

[0067] After the first mold body 1 and the second mold body 2 are closed, the first mold body 1 triggers the travel switch 5, the travel switch 5 is switched to the first state, and the driving piece 4 drives the sliding block 3 to move towards the gap 22 direction to extrude the overflowing paper pulp. The triggering time of the travel switch 5 is linked with the closing action of the first mold body 1 and the second mold body 2, so as to ensure that the sliding block 3 is moved after the mold is closed and the paper pulp is in a suitable state, such as being pressurized for about 5 seconds and the water content of the embryo is discharged by 60% to 70%. At this time, the water content of the embryo is most suitable for folding and edge turning, which can avoid affecting the adhesion of the two layers of paper plastic due to the too dry embryo, and prevent the embryo from being too wet to cause low drainage efficiency or paper plastic fragmentation, thereby guaranteeing the forming quality and stability of the edge folding 71, unifying the thickness of the edge folding 71, and solving the problem of random edge turning length in the existing edge turning process, thereby improving the appearance delicacy of the paper plastic buffer.

[0068] After the pressure of the second mold body 2 is released, the travel switch 5 is switched to the second state, and the driving member 4 drives the sliding block 3 to move away from the gap 22. This action ensures the smoothness of the mold opening process. After the sliding block 3 is reset, it will not hinder the separation of the first mold body 1 and the second mold body 2, and it is convenient to take out the paper-plastic cushion product 7 after molding, avoiding the interference of the improper position of the sliding block 3 on the taking, and ensuring the smooth progress of the production process.

[0069] In this embodiment, the linkage control of the travel switch 5 and the driving member 4 realizes the automation of the sliding block 3 action, reduces the human operation intervention, reduces the error caused by human factors, and improves the stability and consistency of production.

[0070] In some specific embodiments, referring to Figure 9 The paper pulp molding preparation method provided by the embodiment of the disclosure includes the actions of pressurizing the first mold body 1, maintaining pressure, moving the sliding block 3, and releasing pressure. The closing action of the lateral sliding block 3 is performed after about 5s of pressure maintaining. According to the practice of mass production of paper-plastic products, after the pressurization is completed, the blank is pressed to the designed thickness, at this time, the hot-pressing first mold body 1 moves downward to the position of the travel switch 5, and the travel switch 5 has a 5s delay, so the lateral sliding block 3 starts the closing action after 5s of pressure maintaining.

[0071] The reason for the 5s delay of the travel switch 5 is that after 5s of pressure maintaining, the moisture in the blank is discharged by about 60% to 70%, at this time, the moisture content of the blank is most suitable for folding and flanging, and the blank is too dry, which will affect the adhesion effect between the two layers of paper-plastic after folding, and the blank is too wet, which will affect the drainage efficiency, and even the paper-plastic will be broken due to the water vapor being blocked.

[0072] It should be understood that the above-mentioned various forms of flowcharts can be reordered, added or deleted steps. For example, the steps described in the disclosure can be executed in parallel or in sequence or in different order, as long as the desired results of the technical solutions of the disclosure can be achieved, which is not limited herein.

[0073] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0074] The above merely provides the specific implementation of the present disclosure, but the protection scope of the present patent disclosure is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A mold, characterized in that, include: The first mold (1) and the second mold (2) are connected. The first mold (1) has a first mold cavity and the second mold (2) has a second mold cavity. After the first mold (1) and the second mold (2) are connected, the first mold cavity and the second mold cavity cooperate with each other to form a mold cavity that can contain pulp and form the shape of the product (7). When the first mold (1) and the second mold (2) are closed, there is a gap (22) between the edge of the first mold cavity facing the second mold and the edge of the second mold cavity facing the first mold; A slider (3) is provided between the first mold (1) and the second mold (2). The slider (3) is slidably engaged with one of the first mold (1) and the second mold (2). The slider (3) is disposed opposite to the gap (22) and is used to squeeze the pulp overflowing from the gap (22) to form a curled edge (71) when the first mold (1) and the second mold (2) are closed.

2. The mold according to claim 1, characterized in that, It also includes a drive unit (4), the drive end of which is connected to the slider (3) for driving the slider (3) to move toward or away from the gap (22).

3. The mold according to claim 2, characterized in that, It also includes a limit switch (5), which, in response to the first mold (1) triggering the limit switch (5), switches to a first state, and the drive member (4) drives the slider (3) to move toward the gap (22) to squeeze the overflowing pulp.

4. The mold according to claim 1, characterized in that, The second mold body (2) has a mounting groove (21), and the slider (3) is disposed in the mounting groove (21); The slider (3) has a protrusion (31) on its surface facing the gap (22), and the extension direction of the protrusion (31) is consistent with the extension direction of the gap (22).

5. The mold according to claim 4, characterized in that, The protrusion (31) has a recess (311) formed on the surface near the gap (22).

6. The mold according to claim 1, characterized in that, When the first mold (1) and the second mold (2) are closed, a cavity (6) is formed between the first mold (1) and the second mold (2), the slider (3) is disposed in the cavity (6), and the gap (22) communicates with the cavity (6).

7. The mold according to claim 1, characterized in that, The number of sliders (3) is two, and the two sliders (3) are respectively disposed on both sides of the mold cavity.

8. The mold according to claim 1, characterized in that, The number of sliders (3) is multiple, and the multiple sliders (3) are respectively arranged around the mold cavity.

9. A method for preparing pulp by molding, using the mold according to any one of claims 1 to 8, characterized in that, Including the following steps: The wet pulp blank is placed into the second mold cavity of the second mold (2); The first mold (1) and the second mold (2) are joined together; The first mold (1) is continuously heated and pressurized; After heating and pressurizing for a first set time period to allow some of the moisture in the pulp to be discharged from the gap (22), the slider (3) moves toward the gap (22) to squeeze the pulp overflowing from the gap (22) and pressurize and maintain for a second set time period. The second mold (2) is opened after the pressure is released.

10. The pulp molding preparation method according to claim 9, characterized in that, Including the following steps: After the first mold (1) and the second mold (2) are closed, the first mold (1) triggers the limit switch (5), the limit switch (5) switches to the first state, and the driving component (4) drives the slider (3) to move toward the gap (22) to squeeze out the overflowing pulp. After the pressure in the second mold (2) is released, the limit switch (5) switches to the second state, and the drive component (4) drives the slider (3) to move away from the gap (22).

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