Pulp molded product production line

Abstract

The application discloses a paper pulp molded product production line. The paper pulp molded product production line comprises a forming device, a drying device and a cutting device. The drying device comprises a second upper mold, a second lower mold, a second lifting driving assembly, a heating assembly and a second vacuum pumping assembly. The second vacuum pumping assembly sucks air into the second cavity through the second channel structure, so that water vapor flows away from the second channel structure, thereby reducing the possibility of fiber debris carried by water vapor diffused in the air adhering to the dry embryo, improving product quality, and reducing the possibility of carbon deposition caused by the fiber debris adhered to the second upper mold and the second lower mold. At the same time, by setting the sealing structure, the sealing property of the second cavity is improved, the pressure of the water vapor passing through the second channel structure is improved, the fiber adhered in the second channel structure is carried away, the cleanliness of the second channel structure is maintained, and the possibility of carbon deposition in the second channel structure is reduced.

Description

Technical Field

[0001] This application relates to the technical field of pulp molding product production equipment, and in particular to a pulp molding product production line. Background Technology

[0002] In the production process of pulp molding, the wet blank needs to be dried by a drying device to form a wet blank. In related technologies, the drying device includes an upper mold and a lower mold. A heating component is installed in the upper mold or lower mold. When the upper mold and lower mold are closed, the wet blank between the upper mold and the lower mold can be heated and dried to form a dry blank. During the drying process, a large amount of water vapor will overflow. The water vapor will carry fiber debris. After the upper mold and lower mold form a dry blank and the mold is opened, the fiber debris may adhere to the dry blank, affecting the product quality. Furthermore, the fiber debris will adhere to the upper mold or lower mold. After the upper mold and lower mold are closed and heated repeatedly, the fibers attached to the upper mold and lower mold will carbonize and form carbon deposits. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a pulp molding product production line that can reduce water vapor overflow, improve product quality, and reduce carbon deposit formation.

[0004] A pulp molding production line according to an embodiment of this application includes: a molding device, a drying device, and a cutting device.

[0005] The forming device includes a slurry pool, a first upper mold, a first lower mold, and a first lifting drive assembly. The first lower mold is disposed in the slurry pool and is used to absorb the slurry in the slurry pool to form a wet blank. The first upper mold is located above the first lower mold. The first lifting drive assembly is driven to connect to the first upper mold and is used to drive the first upper mold to lift and lower. The first upper mold is capable of picking up and placing the wet blank.

[0006] The drying device includes a second upper mold, a second lower mold, a second lifting drive assembly, a heating assembly, and a second vacuum assembly. The heating assembly is disposed within the second upper mold and / or the second lower mold. The second lifting drive assembly is connected to the second upper mold and is used to drive the second upper mold to rise and fall. The second upper mold and the second lower mold can close to dry the wet blank and form a dry blank. The second upper mold and the second lower mold close to form a second cavity for accommodating the wet blank. The second upper mold and / or the second lower mold are provided with a sealing structure surrounding the second cavity. The second upper mold or the second lower mold is provided with a second channel structure, one end of which is connected to the second cavity and the other end of which is connected to the second vacuum assembly.

[0007] The cutting device includes a third upper die, a third lower die, and a third lifting drive assembly. The third lifting drive assembly is driven and connected to the third upper die. The third lower die is used to place the dry blank. The third lifting drive assembly is driven and connected to the third upper die to drive the third upper die to rise and fall. The third upper die can cooperate with the third lower die to cut the dry blank.

[0008] The pulp molding production line according to the embodiments of this application has at least the following beneficial effects: the first upper mold and the first lower mold can cooperate to form a wet blank. Subsequently, the wet blank is transferred to the second lower mold, and the second lifting drive assembly drives the second upper mold to descend. The second upper mold and the second lower mold close together, so that the wet blank is located in the second cavity formed between the second upper mold and the second lower mold. A heating assembly is provided in the second upper mold or the second lower mold. After the second upper mold and the second lower mold close together, the heating assembly can heat and dry the wet blank in the second cavity to form a dry blank. During the drying process of the wet blank, a large amount of water vapor is generated. The second vacuum assembly draws air into the second cavity through the second channel structure so that the water vapor flows away from the second channel structure, reducing the possibility of water vapor overflow. This reduces the possibility of fiber debris carried by water vapor in the air adhering to the dry blank, improving product quality, and reducing the possibility of fiber debris carried by water vapor adhering to the second upper mold and the second lower mold, and reducing the possibility of carbon deposits forming on the outside of the second upper mold and the second lower mold. Furthermore, because the sealing structure surrounds the second cavity, it improves the sealing performance of the second cavity, further reducing the possibility of water vapor leakage. At the same time, it increases the pressure of water vapor passing through the second channel structure, carrying away the fibers adhering to the second channel structure and maintaining its cleanliness, thereby reducing the possibility of carbon buildup within the second channel structure. The third upper mold and the third lower mold are then joined to cut the dry blank.

[0009] According to some embodiments of this application, the drying apparatus further includes a second translation drive assembly, which is driven to connect to the second lower mold and is used to drive the second lower mold to move below the second upper mold or the first upper mold.

[0010] According to some embodiments of this application, a plurality of second cavities are formed between the second upper mold and the second lower mold, each second cavity corresponding to at least one second channel structure, and the sealing structure surrounds at least two second cavities.

[0011] According to some embodiments of this application, the first upper mold can be closed with the first lower mold, and a first cavity for receiving a wet blank is formed between the first upper mold and the first lower mold, wherein the first upper mold and the first lower mold can compress the wet blank in the first cavity.

[0012] According to some embodiments of this application, the molding apparatus further includes a first vacuuming component, wherein the first lower mold has a first channel structure, one end of the first channel structure is connected to the first cavity, and the other end is connected to the first vacuuming component.

[0013] According to some embodiments of this application, the first upper mold is provided with a first punch, the first upper mold forms a boss surrounding the first punch, and the first upper mold forms a groove between the first punch and the boss; the first lower mold is provided with a first cavity, the first lower mold forms a protrusion surrounding the first cavity; wherein, the first cavity includes a first part and a second part, when the first upper mold and the first lower mold are closed, the first punch is inserted into the first cavity and forms the first part between the first punch and the first cavity, the protrusion is inserted into the groove and forms the second part between the protrusion and the groove, the first part and the second part are connected, and the boss abuts against the end face of the first lower mold near the first upper mold.

[0014] According to some embodiments of this application, the first portion forms a wave segment at one end near the second portion.

[0015] According to some embodiments of this application, the third upper mold includes a third punch; the third lower mold includes a third cavity, a top plate, and an elastic member. The third cavity has a third cavity opposite to the third punch. The top plate is movably disposed in the third cavity and is used to support the blank. The elastic member is disposed in the third cavity and abuts against the top plate. The elastic member applies an elastic force toward the third punch to the top plate. The third cavity has a limiting portion that abuts against the top plate to restrict the top plate from leaving the third cavity.

[0016] According to some embodiments of this application, both the third punch and the third die are provided with a cutting edge structure. A plane perpendicular to the opening and closing direction is defined as a projection plane. The projection of the cutting edge structure on the projection plane surrounds the projection of the third cavity on the projection plane. The cutting edge structure is used to cut the blank along the path surrounding the third cavity.

[0017] According to some embodiments of this application, the third cavity includes a lower template and a limiting plate. The lower template has the third cavity, and the limiting plate is located on the top side of the lower template and extends at least partially to the top side of the third cavity to form the limiting portion.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the pulp molding product production line according to an embodiment of this application;

[0021] Figure 2 for Figure 1 Cross-sectional views of the first and second upper dies of the forming device;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 for Figure 1 Another sectional view of the first and second upper dies of the forming device;

[0024] Figure 5 for Figure 2 Schematic diagram of the structure of the first lower die;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 for Figure 2 Schematic diagram of the structure of the first upper mold;

[0027] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0028] Figure 9 for Figure 1 A cross-sectional view of the second upper mold and the second lower mold of the drying device;

[0029] Figure 10 for Figure 9 Exploded view of the second upper mold and the second lower mold;

[0030] Figure 11 for Figure 1 Cross-sectional view of the third upper die and the third lower die of the cutting device;

[0031] Figure 12 for Figure 11 Enlarged view at point D;

[0032] Figure 13 for Figure 11 Exploded view of the third lower mold;

[0033] Figure 14 for Figure 11 Exploded view of the third upper mold and the dry blank.

[0034] Figure label:

[0035] Molding device 100;

[0036] First upper mold 110, first punch 111, boss 112, groove 113; first adsorption channel 114;

[0037] First lower mold 120, first concave mold 121, protrusion 122, first channel structure 123;

[0038] First cavity 130, first part 131, wave segment 1311, second part 132;

[0039] 140 slurry tank, 150 slurry supply tank, 160 first lifting drive assembly;

[0040] Drying device 200;

[0041] Second upper mold 210, second adsorption channel 211;

[0042] Second lower mold 220, second channel structure 221;

[0043] Second cavity 230;

[0044] Second lifting drive assembly 240

[0045] Second translation drive assembly 250, sealing structure 260;

[0046] Cutting device 300;

[0047] Third upper mold 310; upper template 311; third punch 312; third adsorption channel 3121;

[0048] Third lower mold 320; Third cavity 321; Third cavity 322; Top plate 3221; Elastic element 3222; Mounting hole 3223; Limiting part 3224; Lower template 323; Limiting plate 324; Bottom plate 325; Intermediate plate 326; Buffer element 327; Trimming structure 331; Blank 341; Contact surface 342.

[0049] Third lifting drive component 330;

[0050] 400 material handling robot. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0052] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0054] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0055] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Reference Figure 1 The pulp molding product production line according to an embodiment of this application includes: a molding device 100, a drying device 200, and a cutting device 300.

[0057] Reference Figure 1 The molding device 100 includes a slurry pool 140, a first upper mold 110, a first lower mold 120, and a first lifting drive assembly 160. The first lower mold 120 is disposed in the slurry pool 140 and is used to absorb the slurry in the slurry pool 140 to form a wet blank. The first upper mold 110 is located above the first lower mold 120. The first lifting drive assembly 160 is driven to connect to the first upper mold 110 and is used to drive the first upper mold 110 to lift and lower. The first upper mold 110 can pick up and put in the wet blank.

[0058] Reference Figure 1 , Figure 9 and Figure 10The drying device 200 includes a second upper mold 210, a second lower mold 220, a second lifting drive assembly 240, a heating assembly (not shown in the figure), and a second vacuum assembly (not shown in the figure). The heating assembly is disposed in the second upper mold 210 and / or the second lower mold 220. The second lifting drive assembly 240 is driven to connect to the second upper mold 210 and is used to drive the second upper mold 210 to lift. The second upper mold 210 and the second lower mold 220 can close to dry the wet blank to form a dry blank 341. The second upper mold 210 and the second lower mold 220 close to form a second cavity 230 for accommodating the wet blank. The second upper mold 210 and / or the second lower mold 220 are provided with a sealing structure 260, which surrounds the second cavity 230. The second upper mold 210 or the second lower mold 220 is provided with a second channel structure 221, one end of which is connected to the second cavity 230 and the other end is connected to the second vacuum assembly.

[0059] Reference Figure 1 The cutting device 300 includes a third upper mold 310, a third lower mold 320, and a third lifting drive assembly 330. The third lifting drive assembly 330 is driven to connect to the third upper mold 310. The third lower mold 320 is used to place the blank 341. The third lifting drive assembly 330 is driven to connect to the third upper mold 310 and is used to drive the third upper mold 310 to lift. The third upper mold 310 can cooperate with the third lower mold 320 to cut the blank 341.

[0060] Understandably, the first lower mold 120 is located in the slurry pool 140, which can absorb the slurry in the slurry pool 140 and form a wet blank. The first lifting drive assembly 160 drives the first upper mold 110 to descend, and the first upper mold 110 takes away the wet blank at the first lower mold 120.

[0061] Subsequently, the wet blank is transferred to the second lower mold 220, and the second lifting drive assembly 240 drives the second upper mold 210 to descend. The second upper mold 210 and the second lower mold 220 close together, so that the wet blank is located in the second cavity 230 formed between the second upper mold 210 and the second lower mold 220. A heating assembly is provided in the second upper mold 210 and / or the second lower mold 220. After the second upper mold 210 and the second lower mold 220 close together, the heating assembly can heat and dry the wet blank in the second cavity 230 to form a dry blank 341. During the drying process, a large amount of water vapor is generated. The second vacuum assembly draws air into the second cavity 230 through the second channel structure 221, allowing the water vapor to flow away from the second channel structure 221, reducing the possibility of water vapor overflow. This reduces the possibility of fiber debris carried by the water vapor adhering to the dried blank 341, improving product quality. It also reduces the possibility of fiber debris carried by water vapor adhering to the second upper mold 210 and the second lower mold 220, reducing the possibility of carbon buildup on the outer sides of the second upper mold 210 and the second lower mold 220. Furthermore, since the sealing structure 260 surrounds the second cavity 230, it can improve the sealing performance of the second cavity 230, further reducing the possibility of water vapor overflow. At the same time, it can increase the pressure of water vapor passing through the second channel structure 221 to carry away the fibers adhering to the second channel structure 221, maintaining the cleanliness of the second channel structure 221 and reducing the possibility of carbon buildup within the second channel structure 221.

[0062] After the blank 341 is formed, the blank 341 is transferred to the cutting device 300. The third lifting drive assembly 330 drives the third upper mold 310 and the third lower mold 320 to close the mold to cut the blank 341 and remove the waste material at the edge of the blank 341.

[0063] Specifically, the heating element is a heating tube, which is inserted into the first upper mold 110 and / or the first lower mold 120.

[0064] Specifically, the sealing structure 260 is located on the first lower mold 120, and the sealing structure 260 is a sealing ring.

[0065] Regarding the method of transferring the wet blank from the first upper mold 110 to the first lower mold 120:

[0066] In this embodiment, refer to Figure 1 The drying device 200 also includes a second translation drive assembly 250, which is connected to the second lower mold 220 and is used to drive the second lower mold 220 to move below the second upper mold 210 or the first upper mold 110.

[0067] Understandably, the first lifting drive assembly 160 drives the first upper mold 110 to approach the first lower mold 120, the first upper mold 110 grasps the wet blank on the first lower mold 120, the first lifting drive assembly 160 drives the first upper mold 110 to rise, the second translation drive assembly 250 drives the second lower mold 220 to move between the first upper mold 110 and the second lower mold 220, the first lifting drive assembly 160 drives the first upper mold 110 to descend, and the first upper mold 110 places the wet blank on the second lower mold 220. Subsequently, the second translation drive assembly 250 drives the second lower mold 220 to move below the second upper mold 210, and the second lifting drive assembly 240 can drive the second upper mold 210 to approach the second lower mold 220 so that the second upper mold 210 and the second lower mold 220 close together.

[0068] In other embodiments, the wet blank of the first upper mold 110 can be picked up manually or by a robotic arm and transferred to the second lower mold 220.

[0069] Reference Figure 9 and Figure 10 According to some embodiments of this application, a plurality of second cavities 230 are formed between the second upper mold 210 and the second lower mold 220, each second cavity 230 corresponding to at least one second channel structure 221, and a sealing structure 260 surrounds at least two second cavities 230.

[0070] It is understandable that by setting multiple second cavities 230, each second cavity 230 can correspond to a wet blank, so that the second upper mold 210 and the second lower mold 220 can dry multiple wet blanks simultaneously. Furthermore, the sealing structure 260 surrounds at least two second cavities 230, which can reduce the use of the sealing structure 260 and allow the second cavities 230 to be connected. When the second channel structure 221 corresponding to a certain second cavity 230 is blocked, the water vapor generated in the second cavity 230 can also flow away through the second channel structure 221 corresponding to another second cavity 230, reducing the possibility of steam overflowing from the second cavity 230.

[0071] Specifically, refer to Figure 9 The second upper mold 210 has a second adsorption channel 211 that connects to the second suction assembly (not shown in the figure). After the second upper mold 210 and the second lower mold 220 are opened, the second upper mold 210 can hold the dry blank 341. The second lower mold 220 has a second channel structure 221 for drainage. Thus, the dry blank 341 is left in the second upper mold 210, which helps to keep the dry blank 341 dry.

[0072] Reference Figure 2According to some embodiments of this application, the first upper mold 110 can be closed with the first lower mold 120, and a first cavity 130 for receiving the wet blank is formed between the first upper mold 110 and the first lower mold 120. The first upper mold 110 and the first lower mold 120 can compress the wet blank in the first cavity 130.

[0073] Understandably, after the first lower mold 120 forms a wet blank, the first lifting drive assembly 160 drives the first upper mold 110 to descend, the first upper mold 110 and the first lower mold 120 close together, and the first lifting drive assembly 160 applies a downward pressure to the first upper mold 110. The first upper mold 110 and the first lower mold 120 cooperate to squeeze the wet blank in the first cavity 130 to squeeze out the water in the wet blank, reduce the moisture content of the wet blank, and thus reduce the heat energy required by the drying device 200 to dry the wet blank.

[0074] Reference Figure 4 According to some embodiments of this application, the molding apparatus 100 further includes a first vacuum assembly (not shown in the figure), and the first lower mold 120 has a first channel structure 123, one end of the first channel structure 123 is connected to the first cavity 130, and the other end is connected to the first vacuum assembly.

[0075] Understandably, the first vacuum assembly generates suction in the first channel structure 123. When the first lower mold 120 is in the slurry, the water in the slurry can flow away through the first channel structure 123, while the fibers in the slurry adhere to the first lower mold 120 to form a wet blank. When the first upper mold 110 and the first lower mold 120 close and extrude the wet blank, the water in the wet blank can flow away through the first channel structure 123. Furthermore, in conjunction with the first vacuum assembly, the dehydration efficiency of the wet blank can be improved, further reducing the moisture content of the wet blank.

[0076] It should be noted that, in order to prevent the first channel structure 123 from carrying away the fibers in the slurry, a filter screen can be laid on the first lower mold 120. The filter screen can cover the opening of the first channel structure 123 formed in the first lower mold 120 to block the fibers from entering the first channel structure 123. Alternatively, the filter screen can be laid only at the opening of the first channel structure 123 formed in the first lower mold 120. Alternatively, the opening of the first channel structure 123 formed in the first lower mold 120 can be set to be smaller to prevent the fibers from entering the first channel structure 123.

[0077] Reference Figures 2 to 8According to some embodiments of this application, the first upper mold 110 is provided with a first punch 111, and the first upper mold 110 forms a boss 112 surrounding the first punch 111, and the first upper mold 110 forms a groove 113 between the first punch 111 and the boss 112; the first lower mold 120 is provided with a first cavity 121, and the first lower mold 120 forms a protrusion 122 surrounding the first cavity 121; wherein, the first cavity 130 includes a first part 131 and a second part. In section 132, when the first upper mold 110 and the first lower mold 120 are closed, the first punch 111 is inserted into the first concave mold 121, and a first part 131 is formed between the first punch 111 and the first concave mold 121. The protrusion 122 is inserted into the groove 113, and a second part 132 is formed between the protrusion 122 and the groove 113. The first part 131 and the second part 132 are connected. The boss 112 abuts against the end face of the first lower mold 120 near the first upper mold 110.

[0078] It is understandable that the main body of the wet blank corresponds to the first part 131, and the edge part of the wet blank corresponds to the second part 132. The boss 112 abuts against the end face of the first lower mold 120 near the first upper mold 110, which improves the sealing of the first cavity 130 and allows most of the water squeezed out by the wet blank to be absorbed by the first channel structure 123 at the first lower mold 120, thereby improving the water absorption effect of the first vacuum assembly and further reducing the moisture content of the wet blank.

[0079] Furthermore, by providing a groove 113 between the first punch 111 and the boss 112, the second part 132 formed by the groove 113 and the protrusion 122 can form a bent structure at the edge of the wet blank, so that the water in the wet blank can be absorbed by the first channel structure 123.

[0080] In some cases, the compression between the first upper die 110 and the first lower die 120 may cause the fibers at the edge of the wet blank to be squeezed out or carried away by water due to pressure or overflowing water. By having the boss 112 abut against the end face of the first lower die 120 near the first upper die 110, the risk of the fibers at the edge of the wet blank being squeezed out to form a second part 132 due to the compression between the first upper die 110 and the first lower die 120 can be reduced. Furthermore, the risk of water squeezing out from the edges of the first upper die 110 and the first lower die 120 and carrying away the fibers at the edge of the wet blank can also be reduced, thereby maintaining the structural integrity of the wet blank. Moreover, the cooperation of the groove 113 and the protrusion 122 can further reduce the risk of the edge of the wet blank being squeezed out to form a second part 132.

[0081] Reference Figure 3 According to some embodiments of this application, a wave segment 1311 is formed at one end of the first portion 131 near the second portion 132.

[0082] Understandably, by forming a wavy section 1311 at one end of the first portion 131 near the second portion 132, water in the wet preform can be easily absorbed by the first channel structure 123. Furthermore, in some cases, it can prevent the fibers of the main body of the wet preform from being squeezed to the second portion 132, thereby further reducing the possibility of fibers being squeezed out from the edge portion of the wet preform.

[0083] Regarding the method by which the first upper mold 110 grips the wet blank, refer to... Figure 2 The first upper mold 110 is provided with multiple first adsorption channels 114. One end of the first adsorption channel 114 is connected to the first cavity 130, and the other end is connected to the first air extraction component (not shown in the figure).

[0084] Understandably, the first adsorption channel 114 is connected to the first cavity 130. The first suction component draws air to generate suction in the first adsorption channel 114. After the first upper mold 110 and the first lower mold 120 separate, the extruded wet blank is adsorbed on the first upper mold 110. After the second lower mold 220 moves below the first upper mold 110, the first lifting drive component 160 drives the first upper mold 110 to approach the second lower mold 220. The first suction component cancels the suction, and the wet blank at the first upper mold 110 falls onto the second lower mold 220, completing the transfer of the wet blank.

[0085] Specifically, each first cavity 130 corresponds to multiple first adsorption channels 114. Some of the first adsorption channels 114 are connected to the second part 132. That is, the openings of the first adsorption channels 114 are formed at the positions of the first upper mold 110 corresponding to the first part 131 and the second part 132. The adsorption effect on the wet blank is improved by multiple first adsorption channels 114. It should be noted that the multiple first adsorption channels 114 are connected to the same first suction component. The suction force of the multiple first adsorption channels 114 on the wet blank is roughly the same. The structural strength of the edge part of the wet blank is low. In order to reduce the suction force of the first adsorption channels 114 on the edge part of the wet blank and ensure the structural integrity of the wet blank, the projection of the boss 112 on the horizontal plane and the projection of the opening of the first adsorption channel 114 corresponding to the second part 132 overlap at least partially. By blocking part of the opening of the first adsorption channel 114 corresponding to the second part 132 by the boss 112, the suction force of the first adsorption channel 114 on the edge part of the wet blank is reduced, and the risk of structural damage to the edge part of the wet blank due to excessive suction is reduced.

[0086] Regarding the method by which the slurry pool 140 and the first lower mold 120 are combined to form a wet blank:

[0087] In this embodiment, refer to Figure 1The molding apparatus 100 also includes a slurry supply tank 150 and a slurry pool 140 with an openable and closable slurry inlet and outlet. The slurry supply tank 150 is connected to the slurry pool 140, and the slurry inlet of the slurry pool 140 is connected to the slurry supply tank 150. During the formation of the wet blank, the slurry supply tank 150 supplies slurry into the slurry pool 140. The first lower mold 120 absorbs the slurry in the slurry pool 140 to form the wet blank. After the wet blank is formed, the slurry in the slurry pool 140 is discharged through the slurry outlet of the slurry pool 140. Subsequently, the first upper mold 110 descends to enter the slurry pool 140 and cooperates with the first lower mold 120 to extrude the wet blank. When the first upper mold 110 removes the wet blank and the next wet blank forming process begins, the slurry outlet of the slurry pool 140 is closed, and the slurry supply tank 150 injects slurry again.

[0088] It is understandable that by supplying slurry to the slurry pool 140 in the above manner, the first lower mold 120 can be fixed inside the slurry pool 140 without having to raise the first lower mold 120 away from the slurry pool 140, thereby reducing the production cost of the molding device 100.

[0089] In other embodiments, the first lower mold 120 may be configured to be liftable, allowing it to rise away from the slurry pool 140 and close with the first upper mold 110. It should be understood that if the first lower mold 120 needs to be lifted, a lifting module needs to be installed below it, which would increase the height of the molding device 100's frame. Consequently, the second lower mold 220, which needs to be moved between the first upper mold 110 and the first lower mold 120, also needs to be set higher, affecting equipment stability and increasing production costs.

[0090] To ensure the closing pressure between the first upper mold 110 and the first lower mold 120, refer to Figure 1 The first lifting drive assembly 160 includes a hydraulic cylinder, a pneumatic cylinder, a screw jack, or a rack and pinion jack. The first lifting drive assembly 160 is relatively large, and in order to ensure the mold closing accuracy between the first upper mold 110 and the first lower mold 120, the first upper mold 110 can only be lifted and lowered, and will not be translated relative to the first lower mold 120.

[0091] Reference Figures 11 to 14 According to some embodiments of this application, the third upper mold 310 includes a third punch 312; the third lower mold 320 includes a third cavity 321, a top plate 3221, and an elastic member 3222. The third cavity 321 has a third cavity 322 opposite to the third punch 312. The top plate 3221 is movably disposed in the third cavity 322 and is used to support the blank 341. The elastic member 3222 is disposed in the third cavity 322 and abuts against the top plate 3221. The elastic member 3222 applies an elastic force toward the third punch 312 to the top plate 3221. The third cavity 321 has a limiting part 3224, which abuts against the top plate 3221 to restrict the top plate 3221 from leaving the third cavity 322.

[0092] Specifically, the elastic element 3222 is a spring, which can extend and retract along the mold opening and closing direction. The spring is located on the bottom side of the top plate 3221, with one end connected to the bottom wall of the third cavity 322 and the other end connected to the bottom surface of the top plate 3221. Four springs are arranged in the third cavity 322, spaced apart. The limiting part 3224 is located on the side of the top plate 3221 away from the bottom wall of the third cavity 322, and the limiting part 3224 forms a contact surface 342 perpendicular to the mold opening and closing direction. During the mold closing process, the third punch 312 drives the blank 341 into the third cavity 322 and pushes the top plate 3221 to move along the mold closing direction, so that the top plate 3221 approaches the bottom wall of the third cavity 322. During this process, the spring is compressed and gradually shortens. During the mold opening process, the third punch 312 leaves the third cavity 322, the spring pushes the top plate 3221 to move along the mold opening direction, and the top plate 3221 stops moving after abutting against the contact surface 342.

[0093] Understandably, setting four springs helps reduce the risk of deflection during the movement of the top plate 3221. The contact surface 342 of the limiting part 3224, which is perpendicular to the mold opening and closing direction, can abut against the top plate 3221 and generate a force on the top plate 3221 in the mold closing direction, thereby limiting the movement distance of the top plate 3221 and thus limiting the top plate 3221 from leaving the third cavity 322.

[0094] According to some embodiments of this application, the third die 321 is provided with a limiting part 3224. When the elastic member 3222 drives the top plate 3221 to move towards the third punch 312 in the third cavity 322, the limiting part 3224 can restrict the top plate 3221 from leaving the third cavity 322 by abutting against the top plate 3221, thereby reducing the risk of the top plate 3221 leaving the third cavity 322 when resetting.

[0095] Specifically, regarding how to transfer the dry blank 341 to the cutting device 300, refer to... Figure 1 The blank 341 at the second upper die 210 is transferred to the third upper die 310 by the material handling robot 400. It can be understood that the third upper die 310 includes a third punch 312. The blank 341 is transferred to the third punch 312, and the third punch 312 can position the blank 341 to ensure the accuracy of the cutting position.

[0096] Reference Figures 11 to 14 According to some embodiments of this application, both the third punch 312 and the third die 321 are provided with a cutting edge structure 331. A plane perpendicular to the opening and closing direction is defined as a projection plane. The projection of the cutting edge structure 331 on the projection plane surrounds the projection of the third cavity 322 on the projection plane. The cutting edge structure 331 is used to cut the blank 341 along the path surrounding the third cavity 322.

[0097] It is understandable that the shape and size of the cutting structure 331 on the third die 321 and the cutting structure 331 on the third punch 312 are compatible. During the mold closing process, the cutting structure 331 on the third die 321 and the cutting structure 331 on the third punch 312 approach each other and work together to generate shearing force on the part of the blank 341 located between the cutting structure 331 on the third die 321 and the cutting structure 331 on the third punch 312, thereby removing the waste material at the edge of the blank 341.

[0098] Reference Figures 11 to 14 According to some embodiments of this application, the third die 321 includes a lower die 323 and a limiting plate 324. The lower die 323 has a third cavity 322. The limiting plate 324 is disposed on the top side of the lower die 323 and extends at least partially to the top side of the third cavity 322 to form a limiting portion 3224.

[0099] Specifically, the limiting plate 324 extends to the top side of the third cavity 322 and covers part of the opening of the third cavity 322 (not shown in the figure) from the top side of the third cavity 322, and forms a contact surface 342 perpendicular to the mold opening and closing direction.

[0100] It is understandable that the contact surface 342 perpendicular to the mold opening and closing direction can abut against the top plate 3221. When the contact surface 342 perpendicular to the mold opening and closing direction abuts against the top plate 3221, it can provide a force on the top plate 3221 along the mold closing direction, which helps to restrict the top plate 3221 from leaving the third cavity 322 through the opening of the third cavity 322, thereby reducing the risk of the top plate 3221 leaving the third cavity 322 when it is reset.

[0101] Reference Figures 11 to 14 According to some embodiments of this application, the limiting portion 3224 is annular, corresponding to the opening of the third cavity 322.

[0102] Specifically, the limiting plate 324 is an annular shape that matches the shape of the opening (not shown in the figure) of the third cavity 322, and the size of the annular hollow part of the limiting plate 324 is smaller than the size of the opening of the third cavity 322.

[0103] Understandably, the size of the annular hollow portion of the limiting plate 324 is smaller than the size of the opening of the third cavity 322, so that the limiting plate 324 partially covers the opening of the third cavity 322 and forms an annular limiting portion 3224. The contact surface 342 on the limiting portion 3224 is annular, and the annular contact surface 342 can abut against the top plate 3221, which helps to reduce the risk of the top plate 3221 tilting when the limiting portion 3224 abuts against the top plate 3221.

[0104] Reference Figure 12 and Figure 13According to some embodiments of this application, the lower template 323 includes a base plate 325 and an intermediate plate 326. One side of the intermediate plate 326 is connected to the limiting plate 324, and the other side of the intermediate plate 326 is connected to the base plate 325 through a buffer member 327.

[0105] Specifically, the buffer 327 is a rubber ring, and the base plate 325 has a rubber ring mounting groove (not shown in the figure), in which the rubber ring is installed.

[0106] The rubber ring abuts against the wall of the rubber ring mounting groove (not shown in the figure), and part of the rubber ring extends out of the rubber ring mounting groove from the opening of the rubber ring mounting groove (not shown in the figure) and abuts against the intermediate plate 326. A pin (not shown) is also provided between the intermediate plate 326 and the base plate 325.

[0107] Understandably, when the die is closed, the intermediate plate 326 is pushed by the third punch 312 and moves towards the base plate 325 along the die-closing direction, compressing the buffer member 327. The buffer member 327 provides cushioning for the die-closing process, which helps to improve the service life of the die. The pin between the intermediate plate 326 and the base plate 325 restricts the movement of the intermediate plate 326 in directions other than the die-opening and closing direction.

[0108] Reference Figure 11 and Figure 12 According to some embodiments of this application, the third upper mold 310 includes an upper template 311, and the third punch 312 is detachably mounted on the upper template 311.

[0109] Specifically, both the upper template 311 and the third punch 312 are provided with pin holes (not shown in the figure), and the upper template 311 and the third punch 312 are connected by pins (not shown). It can be understood that the pin connection between the upper template 311 and the third punch 312 allows the third punch 312 to be disassembled from the upper template 311. The third punch 312 may wear during use; making it detachable allows for replacement, which helps reduce the maintenance cost of the die.

[0110] Specifically, refer to Figure 12 The third upper mold 310 has a third adsorption channel 3121 that connects to the third suction component. After the third upper mold 310 and the third lower mold 320 are opened, the third upper mold 310 can hold the dry blank 341 so that the cut waste material remains in the third lower mold 320, thereby achieving waste separation.

[0111] Reference Figure 12 and Figure 13 According to some embodiments of this application, a mounting hole 3223 is provided in the third cavity 322, and the elastic member 3222 is installed in the mounting hole 3223.

[0112] Specifically, the mounting hole 3223 is located on the bottom wall of the third cavity 322 (not shown in the figure). The axial direction of the mounting hole 3223 is parallel to the mold opening and closing direction. The elastic element 3222 is a spring, and the radius of the mounting hole 3223 is adapted to the spring.

[0113] Understandably, the mounting hole 3223 facilitates the installation of the elastic element 3222 and also helps reduce the risk of the elastic element 3222 becoming misaligned.

[0114] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A line for the production of moulded pulp products, characterised in that include: A molding apparatus includes a slurry pool, a first upper mold, a first lower mold, and a first lifting drive assembly. The first lower mold is disposed in the slurry pool and is used to absorb the slurry in the slurry pool to form a wet blank. The first upper mold is located above the first lower mold. The first lifting drive assembly is driven and connected to the first upper mold and is used to drive the first upper mold to lift and lower. The first upper mold is capable of picking up and placing the wet blank. A drying device includes a second upper mold, a second lower mold, a second lifting drive assembly, a heating assembly, and a second vacuum assembly. The heating assembly is disposed within the second upper mold and / or the second lower mold. The second lifting drive assembly is connected to the second upper mold and is used to drive the second upper mold to rise and fall. The second upper mold and the second lower mold can close to dry the wet blank and form a dry blank. The second upper mold and the second lower mold close to form a second cavity for accommodating the wet blank. The second upper mold and / or the second lower mold are provided with a sealing structure surrounding the second cavity. The second upper mold or the second lower mold is provided with a second channel structure, one end of which is connected to the second cavity and the other end of which is connected to the second vacuum assembly. The cutting device includes a third upper mold, a third lower mold, and a third lifting drive assembly. The third lifting drive assembly is driven to connect to the third upper mold. The third lower mold is used to place the dry blank. The third lifting drive assembly is driven to connect to the third upper mold and is used to drive the third upper mold to lift. The third upper mold can cooperate with the third lower mold to cut the dry blank. The first upper mold can be closed with the first lower mold, and a first cavity for accommodating the wet blank is formed between the first upper mold and the first lower mold. The first upper mold and the first lower mold can compress the wet blank in the first cavity. The molding device further includes a first vacuuming component, and the first lower mold has a first channel structure, one end of the first channel structure is connected to the first cavity, and the other end is connected to the first vacuuming component. The first upper mold is provided with a first punch, and the first upper mold forms a boss surrounding the first punch. The first upper mold forms a groove between the first punch and the boss. The first lower mold is provided with a first cavity, and the first lower mold forms a protrusion surrounding the first cavity. The first cavity includes a first part and a second part. When the first upper mold and the first lower mold are closed, the first punch is inserted into the first cavity and forms the first part between the first punch and the first cavity. The protrusion is inserted into the groove and forms the second part between the protrusion and the groove. The first part and the second part are connected. The boss abuts against the end face of the first lower mold near the first upper mold.

2. The pulp molding product production line according to claim 1, characterized in that, The drying device further includes a second translation drive assembly, which is connected to the second lower mold and is used to drive the second lower mold to move below the second upper mold or the first upper mold.

3. The molded pulp product line of claim 1, wherein, A plurality of second cavities are formed between the second upper mold and the second lower mold, each second cavity corresponding to at least one second channel structure, and the sealing structure surrounds at least two second cavities.

4. The pulp molded product production line according to claim 1, characterized by, The first part forms a wave segment near the end of the second part.

5. The pulp molded product line according to claim 1, characterized by The third upper mold includes a third punch; the third lower mold includes a third lower mold, a top plate, and an elastic element. The third lower mold has a third cavity opposite to the third punch. The top plate is movably disposed in the third cavity and is used to support the blank. The elastic element is disposed in the third cavity and abuts against the top plate. The elastic element applies an elastic force toward the third punch to the top plate. The third lower mold has a limiting part that abuts against the top plate to restrict the top plate from leaving the third cavity.

6. A line for the production of moulded pulp products according to claim 5, characterised in that, Both the third punch and the third die are provided with a cutting edge structure. A plane perpendicular to the opening and closing direction is defined as a projection plane. The projection of the cutting edge structure on the projection plane surrounds the projection of the third cavity on the projection plane. The cutting edge structure is used to cut the blank along the path surrounding the third cavity.

7. The molded pulp product line of claim 5, wherein, The third cavity includes a lower template and a limiting plate. The lower template has the third cavity, and the limiting plate is located on the top side of the lower template and extends at least partially to the top side of the third cavity to form the limiting portion.

8. The pulp molded product line according to claim 1, characterized by The first upper mold is provided with multiple first adsorption channels, one end of which is connected to the first cavity and the other end is connected to the first air extraction component.

9. The pulp molding product production line according to claim 8, characterized in that, Each of the first cavities corresponds to a plurality of the first adsorption channels, and some of the first adsorption channels are connected to the second part.

10. A pulp molded product production line according to claim 9, characterized in that, The projection of the boss on the horizontal plane and the projection of the opening of the first adsorption channel corresponding to the second part overlap at least partially, and the boss partially blocks the opening of the first adsorption channel corresponding to the second part.

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