Method for manufacturing corrugated plate

Abstract

A method for manufacturing a corrugated plate, comprising the following steps performed in sequence in a processing order: S1, forming, on a blank plate, transverse corrugations extending in the transverse direction of the blank plate; S2, forming a pattern feature on the transverse corrugations; and S3, forming longitudinal corrugations and an intersection part on the blank plate, wherein the intersection part is formed at the intersections of the longitudinal corrugations and the transverse corrugations, and the shape of the intersection part is specifically related to the shape of the pattern feature. According to the method, the pattern feature is pressed on the transverse corrugations of the blank plate in advance, so that the structural stability and the shape controllability of the intersection part formed in the subsequent steps can be improved.

Description

Method for manufacturing corrugated board Technical Field

[0001] The invention relates to the field of metal plate processing, and in particular to a method for manufacturing a corrugated plate. Background Art

[0002] In recent decades, with the rapid development of my country's economy, its dependence on energy has become increasingly high, especially the use of energy-saving and environmentally friendly energy has become more and more extensive, such as the gradual shift from traditional oil to cleaner natural gas energy, and the storage technology of these energy sources is also constantly updated and developed.

[0003] A liquid storage tank is a container for storing liquids and is a common method of energy storage, particularly in oil depots and natural gas storage facilities. In pipeline transportation, it serves as the oil source connection for oil pipelines. Based on their architectural characteristics, they can be categorized as aboveground, underground, and cave tanks. Aboveground tanks are generally used for transfer depots, distribution depots, and corporate oil depots, while strategically important reserve and military depots often utilize cave, underground, and semi-underground tanks. Based on their material, they can be categorized into two main types: non-metallic and metal. Metal tanks are widely used due to their low cost, low leakage resistance, ease of construction, and simple maintenance.

[0004] With the continuous growth of my country's gas industry, the consumption market for low-temperature refrigerated liquefied gases represented by liquefied natural gas, liquid nitrogen, liquid hydrogen and liquid helium has increased rapidly, while the storage requirements for liquid hydrogen and liquid helium are becoming increasingly higher, especially low-temperature storage. Technical issues

[0005] The corrugated sheeting, a core technology in cryogenic storage tanks, must maintain excellent sealing and stability under a variety of operating conditions. Therefore, the sheeting's configuration and quality are crucial, placing high demands on its manufacturing process. However, existing processes for corrugated sheeting, particularly at the intersection of horizontal and vertical corrugations, require improvement in material uniformity, smoothness, and strength.

[0006] Therefore, it is necessary to provide a method for manufacturing corrugated board to at least partially solve the above problems. Technical Solutions

[0007] The object of the present invention is to provide a method for manufacturing a corrugated plate, which includes three processing steps in sequence. In the present invention, the structural form of the intersection of the transverse corrugations and the longitudinal corrugations of the formed corrugated plate is mainly determined by the pattern features processed by the second processing device on the transverse corrugations of the blank plate, and by pre-pressing the pattern features on the transverse corrugations of the blank plate, the structural stability and shape controllability of the intersection formed in the subsequent steps can be improved. In addition, the processing of the special structural form of the intersection is independent of the processing of the transverse corrugations. Compared with the traditional solution of processing the characteristic structure at the center of the transverse corrugations while processing the transverse corrugations, the present invention processes the characteristic structure at the center of the already formed transverse corrugations, and the forming of the characteristic structure is independent of the forming of the transverse corrugations. Compared with using a flat blank plate as a processing base, the present invention uses the formed transverse corrugations as a processing base, which can make the forming of the characteristic structure more precise and more conducive to the configuration of the final intersection.

[0008] The method for manufacturing a corrugated board according to the present invention comprises the following steps which are performed in sequence:

[0009] S1 forming transverse corrugations extending in the transverse direction of the blank plate on the blank plate;

[0010] S2 forms pattern features on the transverse corrugations; and

[0011] S3 forms longitudinal corrugations and intersections on the blank plate, wherein the intersections are formed at intersections of the longitudinal corrugations and the transverse corrugations, and a shape of the intersection is specifically related to a shape of the pattern feature.

[0012] Preferably, steps S1, S2 and S3 are performed in the first processing device, the second processing device and the third processing device in sequence.

[0013] Preferably, the method further comprises:

[0014] In step S1, at least two transverse corrugations spaced apart in the longitudinal direction of the blank plate are formed on the blank plate;

[0015] Preferably, the first processing device includes a first upper pressing plate and a first lower pressing plate that are separable from each other, the first upper pressing plate includes at least two spaced-apart first shaping protrusions, the bottom end of the first shaping protrusion has a first predetermined forming contour with a longitudinal dimension gradually tapering toward the bottom side, and the first predetermined forming contour is smooth, the first lower pressing plate includes at least two spaced-apart first recessed portions, the shape of the first recessed portion matches the shape of the first shaping protrusion, and the first shaping protrusion and the first recessed portion cooperate with each other to form the transverse corrugations.

[0016] Preferably, the first upper blank pressing plate includes an intermediate upper blank pressing plate and end upper blank pressing plates positioned on both sides of the intermediate upper blank pressing plate, and the first shaping protrusions extend along the intersection of the intermediate upper blank pressing plate and the end upper blank pressing plates respectively.

[0017] The step S1 further includes: first driving the middle upper pressing plate to move toward the first lower pressing plate to press the corresponding middle part of the blank plate, and then driving the end upper pressing plate and at least two of the first shaping protrusions to move toward the first lower pressing plate to form the transverse corrugations on the blank plate.

[0018] Preferably, the second processing device includes a second upper pressing plate and a second lower pressing plate that are separable from each other, the second upper pressing plate including at least two spaced-apart second shaping protrusions, the bottom end of the second shaping protrusion having a longitudinal dimension that tapers toward the bottom side with a second predetermined forming contour, the transverse center position of the second shaping protrusion having a pattern feature structure, the pattern feature structure being configured to shape the pattern feature on the transverse corrugation of the blank plate, the second lower pressing plate including at least two spaced-apart second recesses, the shape of the second recesses matching the shape of the second shaping protrusions, and features corresponding to the pattern feature structures being formed on the second recesses,

[0019] The step S2 further includes: driving the second upper blank holder to move toward the second lower blank holder to form the pattern features on the transverse corrugations.

[0020] Preferably, the pattern characteristic structure includes:

[0021] a pair of recessed portions disposed laterally symmetrically about the center of the bottom surface of the pattern feature structure and located on the side surfaces of the second shaping protrusion;

[0022] A pair of cutouts are longitudinally symmetrically arranged about the center of the bottom surface of the pattern feature structure and located on the bottom surface of the second shaping protrusion,

[0023] The recessed depth of the pair of cutout portions is greater than the recessed depth of the pair of recessed portions, and the pair of recessed portions are located between the pair of cutout portions in the longitudinal direction.

[0024] Preferably, the pattern feature structure also includes a bulge formed at the center position of the bottom surface and four pits arranged around the bulge on the bottom surface, two of the four pits are symmetrical about the bulge in the longitudinal direction, and the other two pits are symmetrical about the bulge in the transverse direction, and the bulge and the four pits are located between the pair of cutout portions in the longitudinal direction.

[0025] Preferably, the method further comprises:

[0026] In step S3, before forming the longitudinal corrugations and the intersection portion, at least the concave portions on the blank plate corresponding to the pair of cutout portions are compressed.

[0027] Preferably, the third processing device comprises:

[0028] a pair of sliding plates capable of moving away from and toward each other in a lateral direction;

[0029] a pair of third pressing plates, the pair of third pressing plates being correspondingly located on top sides of the pair of sliding plates to press the blank plate tightly between the pair of sliding plates and the pair of third pressing plates;

[0030] a third shaping protrusion, the third shaping protrusion being located between the pair of sliding plates and extending in the longitudinal direction, the bottom end of the third shaping protrusion having a third predetermined shaping profile with a transverse dimension gradually decreasing toward the bottom side, and the third predetermined shaping profile being smooth;

[0031] A driving mechanism, comprising:

[0032] two rows of sliding plate driving parts, the two rows of sliding plate driving parts are respectively positioned laterally outside the pair of third pressing plates, and each row of the sliding plate driving parts has a plurality of parts; and

[0033] a third shaping protrusion driving portion connected to the third shaping protrusion,

[0034] The third shaping protrusion driving portion and the sliding plate driving portion are linked together, so that when the sliding plate driving portion drives the pair of sliding plates to approach each other, the third shaping protrusion driving portion drives the third shaping protrusion to move downward.

[0035] Preferably, the bottom of the third pressing plate is provided with two groups of protrusions corresponding to the transverse corrugations formed on the blank plate, and the two groups of protrusions are arranged in the longitudinal direction. The positions of the protrusions adjacent to the third shaping protrusions are provided with characteristic structures corresponding to the pattern features, wherein the characteristic structures include positioning protrusions, and the positioning protrusions are used to penetrate into the concave parts on the corresponding pattern features on the blank plate.

[0036] Preferably, the lower surface of the third pressing plate is closer to the sliding plate than the lowermost end of the third shaping protrusion.

[0037] Preferably, the method further comprises running the drive mechanism downwards in step S3, wherein:

[0038] In a first stage of downward movement of the driving mechanism, the third pressing plate is driven downward so that the blank plate is pressed between the third pressing plate and the sliding plate, wherein the concave portion on the blank plate is pressed;

[0039] In the second stage of the downward movement of the driving mechanism, the pair of sliding plates are approached to each other at a first predetermined speed, while the third shaping protrusion is moved downward at a second predetermined speed, and the pair of third pressing plates are approached to each other at a third predetermined speed to form the longitudinal corrugations and the intersection portion.

[0040] Preferably, the first predetermined speed, the second predetermined speed and the third predetermined speed are specifically related to a predetermined profile of the intersection portion.

[0041] Preferably, the driving mechanism comprises a main horizontal plate and a vertical plate connected as one body, wherein the vertical plate extends downward from the center of the main horizontal plate in the transverse direction, wherein:

[0042] The sliding plate driving part is a driving block, the top of the driving block is fixed to the main horizontal plate, and a force-bearing part corresponding to the driving block is installed on the lateral outer side of the sliding plate, and the driving block and the force-bearing part are in contact with each other through an inclined surface; the third shaping protrusion is fixed to the bottom end of the vertical plate,

[0043] The method further includes: in a second stage of the downward movement of the driving mechanism, moving the main horizontal plate downward to drive the vertical plate downward and causing the driving block to contact the force-bearing portions on the outer sides of the pair of sliding plates.

[0044] Preferably, the pair of third pressing plates are driven by the pair of sliding plates.

[0045] Preferably, the manufacturing method further includes: in the first stage of the downward movement of the driving mechanism, controlling the pressure source nitrogen spring arranged between the main horizontal plate of the driving mechanism and a pair of third pressing plates used to press above the blank plate so that the pair of third pressing plates move vertically with the main horizontal plate. Beneficial effects

[0046] In the present invention, the method for manufacturing a corrugated plate includes three processing steps performed in sequence. The structural morphology of the intersection of the transverse corrugations and the longitudinal corrugations of the formed corrugated plate is mainly determined by the pattern features processed by the second processing device on the transverse corrugations of the blank plate. By pre-pressing pattern features with weak points and strengthening points on the transverse corrugations of the blank plate, the structural stability and shape controllability of the intersection formed in the subsequent steps can be improved. In addition, the processing of the special structural morphology of the intersection is independent of the processing of the transverse corrugations. Compared with the traditional solution of processing a characteristic structure at the center of the transverse corrugations while processing the transverse corrugations, the present invention processes the characteristic structure at the center of the already formed transverse corrugations, and the forming of the characteristic structure is independent of the forming of the transverse corrugations. Compared with using a flat blank plate as a processing base, the present invention uses formed transverse corrugations as a processing base, which can make the forming of the characteristic structure more precise and more conducive to the configuration of the final intersection. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] To better understand the above and other objects, features, advantages, and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to illustrate preferred embodiments of the present invention by way of illustration and are not intended to limit the scope of the present invention. The components in the drawings are not drawn to scale.

[0048] FIG1 is a schematic diagram of a first processing device of a processing system according to some preferred embodiments of the present invention;

[0049] FIG2 is a schematic diagram of an upper mold of the first processing device in FIG1 ;

[0050] FIG3 is a schematic diagram of the lower mold of the first processing device in FIG1 ;

[0051] FIG4 is a schematic diagram of a second processing device of a processing system according to some preferred embodiments of the present invention;

[0052] FIG5 is a schematic diagram of an upper mold of the second processing device in FIG4 ;

[0053] FIG6 is a schematic diagram of the lower mold of the second processing device in FIG4 ;

[0054] 7A-7C are partial schematic diagrams of the pattern feature structure of the upper mold in FIG5 , and FIG7A-7C are from different perspectives;

[0055] FIG8 is a schematic diagram of a third processing device of the processing system according to some preferred embodiments of the present invention;

[0056] FIG9 is a side view of the third processing device in FIG8;

[0057] FIG10 is a schematic diagram of the upper mold of the third processing device in FIG8;

[0058] FIG11 is a schematic diagram of the lower mold of the third processing device in FIG8 ;

[0059] FIG12 is a schematic diagram of the third processing device in FIG8 with the main horizontal plate removed;

[0060] FIG13 is a schematic diagram of the view in FIG12 with the intermediate horizontal plate further removed;

[0061] FIG14 is a separate schematic diagram of the sliding plate driving portion and the force-bearing portion of the third processing device in FIG8; and

[0062] FIG. 15 is a schematic flow diagram of a method for manufacturing a corrugated board according to some preferred embodiments of the present invention.

[0063] Reference numerals:

[0064] First processing device 100

[0065] First upper mold 110

[0066] First lower mold 120

[0067] First upper pressing plate 130

[0068] Middle upper pressing plate 131

[0069] End upper pressing plate 132

[0070] First lower pressing plate 140

[0071] First shaping protrusion 150

[0072] First recessed portion 160

[0073] Second processing device 200

[0074] Second upper mold 210

[0075] Second lower mold 220

[0076] Second upper pressing plate 230

[0077] Second lower pressing plate 240

[0078] Second shaping protrusion 250

[0079] Pattern characteristic structure 260

[0080] Bottom surface center of the pattern feature structure 261

[0081] Cutout 262

[0082] Recess 263

[0083] pit 264

[0084] Second recessed portion 270

[0085] Corresponding pattern feature structure 281

[0086] Third processing device 500

[0087] Sliding plate 50

[0088] The third lower die 53

[0089] Limiting member 54

[0090] First slider 55

[0091] The third lateral recessed portion 56

[0092] The third longitudinal recessed portion 57

[0093] Guide rail groove 58 of sliding plate

[0094] The third pressing plate 60

[0095] Second contact portion 61

[0096] First contact portion 62

[0097] Guide rail bracket 63

[0098] Guide Rail 631

[0099] Main horizontal slab 71

[0100] Vertical plate 72

[0101] Intermediate horizontal plate 73

[0102] Pressure source nitrogen spring 74

[0103] protrusion 76

[0104] Drive block 77

[0105] Incline 771

[0106] Second slider 78

[0107] Laterally extending spring member 79

[0108] The third shaping protrusion 81 . DETAILED DESCRIPTION

[0109] Now referring to the accompanying drawings, the specific embodiments of the present invention will be described in detail. What is described here is only the preferred embodiment of the present invention. Those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and the other ways also fall within the scope of the present invention.

[0110] The present invention provides a processing apparatus and method for processing corrugated sheeting for use in liquefied gas storage tanks for transportation equipment, particularly ships and other marine equipment. Figures 1-14 illustrate schematic diagrams of a processing apparatus according to a preferred embodiment of the present invention, and Figure 15 illustrates a schematic flow diagram of a processing method according to a preferred embodiment of the present invention.

[0111] First, it should be noted that the directional and positional terms mentioned in this disclosure are intended to be illustrative rather than restrictive. Descriptions of component positions should be understood as relative positions, not absolute positions, and descriptions of component extension directions should be understood as relative directions, not absolute directions. Directional and positional terms related to processing devices can be understood with reference to the positions and orientations of the components shown in Figures 1-14. For example, terms such as "top side," "upward," "bottom side," and "downward" of components of various processing devices can be interpreted with reference to the placement orientation of the processing devices shown in the accompanying drawings. "Upward" and "downward" refer to the vertical direction, as indicated by D3; "transverse direction" and "longitudinal direction" refer to two horizontal directions perpendicular to each other, with the transverse direction indicated by D2 and the longitudinal direction indicated by D1. The vertical direction D3, transverse direction D2, and longitudinal direction D1 are orthogonal in space. "Longitudinal corrugations" of a corrugated sheet refer to corrugations extending in the longitudinal direction, while "transverse corrugations" refer to corrugations extending in the transverse direction.

[0112] The processing system of the present invention comprises a first processing apparatus 100, a second processing apparatus 200, and a third processing apparatus 500, arranged in a sequential processing sequence. A blank sheet undergoes these processes in sequence to achieve final forming. The first processing apparatus 100, the second processing apparatus 200, and the third processing apparatus are independently arranged relative to one another, but are sequenced and positioned relative to one another in a process or assembly line. Figures 1-3 illustrate the first processing apparatus 100, Figures 4-7C illustrate the second processing apparatus 200, and Figures 8-14 illustrate the third processing apparatus 500.

[0113] First, referring to Figures 1 to 3, the first processing device 100 includes a first upper mold 110 and a first lower mold 120. The bottom of the first upper mold 110 has a first upper pressing plate 130 extending along a horizontal plane (defined by the transverse direction D2 and the longitudinal direction D1), and the top of the first lower mold 120 has a first lower pressing plate 140 extending along the horizontal plane. During processing, the blank plate will be clamped between the first upper pressing plate 130 and the first lower pressing plate 140.

[0114] A first shaping protrusion 150 extending in a transverse direction is provided on the bottom surface of the first upper pressing plate 130. The bottom end of the first shaping protrusion 150 has a first predetermined shaping profile with a longitudinal dimension that tapers toward the bottom side. The first predetermined shaping profile is smooth and has no wrinkles, depressions, or protruding structures (especially in the central area), nor does it have a unique central area morphology. The first predetermined shaping profile has the same cross-sectional shape within any cross-section defined by the height direction and the longitudinal direction. The first processing device 100 is configured to form transverse corrugations on the blank. Correspondingly, a first recessed portion 160 is formed on the top surface of the first lower mold 120. The shape and size of the first recessed portion 160 correspond to those of the first shaping protrusion 150, so as to allow the blank to deform under the action of the first shaping protrusion 150. Preferably, the first shaping protrusion 150 is detachably mounted on the first upper mold 110.

[0115] Preferably, the first upper blank plate 130 is provided with two first shaping protrusions 150, and the first upper blank plate 130 includes an intermediate upper blank plate 131 and an end upper blank plate 132 positioned on both sides of the intermediate upper blank plate 131, and the two first shaping protrusions 150 extend along the intersection position of the intermediate upper blank plate 131 and the end upper blank plate 132 respectively. The first upper blank plate 130 is configured so that during the shaping process, the intermediate upper blank plate 131 first actuates toward the first lower blank plate 140, and the end upper blank plate 132 and the two first shaping protrusions 150 then actuate toward the first lower blank plate 140. That is to say, when the first processing device 100 is used to process the blank plate, the intermediate upper blank plate 131 in the first upper blank plate 130 first presses the blank plate downwards, thereby positioning the blank plate. After this, the end upper blank plate 132 and the first shaping protrusion 150 fall together again and are formed on the blank plate. This arrangement can, on the one hand, prevent the blank from shifting relative to the first processing device 100, thereby improving processing accuracy; on the other hand, it can ensure the overall thickness and uniformity of the blank, thereby preventing it from being stretched and thinned during processing. A spring can be provided on the top of the intermediate upper blank pressing plate 131 and / or the end upper blank pressing plate 132 to drive the intermediate upper blank pressing plate 131 and / or the end upper blank pressing plate 132 to move downward.

[0116] Referring to Figures 4-7C below, the second processing device 200 includes a second upper mold 210 and a second lower mold 220. The bottom of the second upper mold 210 has a second upper pressing plate 230 extending along a horizontal plane (defined by the transverse direction D2 and the longitudinal direction D1), and the top of the second lower mold 220 has a second lower pressing plate 240 extending along the horizontal plane. During processing, the blank plate will be clamped between the second upper pressing plate 230 and the second lower pressing plate 240.

[0117] A second shaping protrusion 250 extending in the transverse direction is provided on the bottom surface of the second upper blank holder 230. The bottom end of the second shaping protrusion 250 has a second predetermined shaping profile with the longitudinal dimension gradually decreasing toward the bottom side. A pattern feature structure 260 is provided at the transverse center of the second shaping protrusion 250. The pattern feature structure 260 is configured to shape a pattern feature on the transverse corrugation of the blank plate. The shape and size of the second shaping protrusion 250, other than the pattern feature structure 260, are consistent with those of the first shaping protrusion 150.

[0118] Figures 7A-7C illustrate the pattern feature structure 260 in detail. Figures 7A-7C show different perspectives of the pattern feature structure 260. Figure 7C is inverted compared to Figures 4-7A to more clearly illustrate the pattern feature structure 260. Specifically, a bulge is formed at the center 261 of the bottom surface of the pattern feature structure 260, which can serve as a reinforcement point for the reinforcement structure. In addition, four pits 264 are provided on the bottom surface of the pattern feature structure 260, surrounding the bulge, as weak points. Two of the four pits 264 are symmetrical about the bulge in the longitudinal direction, and the other two are symmetrical about the bulge in the transverse direction. Preferably, the projected area of ​​the two longitudinally symmetrical pits 264 is larger than the projected area of ​​the two transversely symmetrical pits 264.

[0119] Preferably, the tread feature structure 260 further includes a pair of recessed portions 263 serving as weak points. The pair of recessed portions 263 are symmetrically arranged in the transverse direction about the center 261 of the bottom surface of the tread feature structure 260 and are respectively located on the side surfaces of the second shaping protrusion 250. The tread feature structure 260 further includes a pair of cutout portions 262 symmetrically arranged in the longitudinal direction about the center 261 of the bottom surface of the tread feature structure 260 and located on the bottom surface of the second shaping protrusion 250. It will be understood that the pair of cutout portions 262 and the pair of recessed portions 263 are arranged around the four dimples 264, that is, the four dimples 264 are closer to the center 261 of the bottom surface of the tread feature structure 260. In particular, the recessed depth of the pair of cutout portions 262 is greater than the recessed depth of the pair of recessed portions 263. For example, referring to Figure 7C, the inward recessed dimension of the pair of cutout portions 262 relative to the bottom surface of the second shaping protrusion 250 is greater than the inward recessed dimension of the pair of recessed portions 263 relative to the side surface of the second shaping protrusion 250 along the longitudinal direction.

[0120] In the present invention, the structural form of the intersection of the transverse corrugations and the longitudinal corrugations of the formed corrugated plate is mainly determined by the pattern features processed by the second processing device 200 on the transverse corrugations of the blank plate, and by pre-pressing the pattern features on the transverse corrugations of the blank plate, the structural stability and shape controllability of the intersection formed in the subsequent steps can be improved. In addition, the processing of the special structural form of the intersection is independent of the processing of the transverse corrugations. Compared with the traditional solution of processing the characteristic structure at the center of the transverse corrugations while processing the transverse corrugations, the present invention processes the characteristic structure at the center of the already formed transverse corrugations, and the forming of the characteristic structure is independent of the forming of the transverse corrugations. Compared with using a flat blank plate as a processing base, the present invention uses the formed transverse corrugations as a processing base, which can make the forming of the characteristic structure more precise and more conducive to the final configuration of the intersection.

[0121] It should be noted that the pattern features at the center of the transverse corrugations obtained after processing by the second processing device 200 are not completely identical to the processed features of the intersection region of the final corrugated sheet. The processed features or shape of the intersection region of the final corrugated sheet are specifically related to the shape of the pattern features. In other words, the pattern features obtained after processing by the second processing device 200 can be considered as the precursor profile of the pattern features of the final intersection region. When the third processing device processes the blank sheet, the deformation direction at the intersection of the transverse and longitudinal corrugations is guided by the precursor profile. For example, the intersection of the final corrugated sheet will also have a sharp concave portion corresponding to the cutout portion 262. The size of this sharp concave portion is approximately the same as that of the cutout portion 262, meaning that the formation of this sharp concave portion has already been completed in the second processing step. The intersection of the final corrugated sheet will also have a ridge portion, which corresponds to the bottom center region surrounded by four dimples 264 in Figures 7A-7C. The width of this ridge portion (i.e., its longitudinal dimension) is approximately equal to the width of the bottom center region. The structural morphology of the dimples 263 facilitates the formation of the interface between the longitudinal corrugations and the characteristic portion of the corrugated sheet corresponding to the dimples 263 during the formation of the longitudinal corrugations. The small dimples formed by the second processing device 200 are transformed into ridges after passing through the third processing device 500. The small protrusions formed by the second processing device 200 are transformed into sharp protrusions after passing through the third processing device 500. Figures 7A-7C illustrate that the pattern feature structure is particularly beneficial to the forming stability and controllability of the final corrugated sheet. Providing the second processing device 200 to form the pattern features independently of the first processing device 100 and the third processing device 500 is particularly advantageous for forming a sheet with dual transverse corrugations. If the second processing device 200 is integrated into the first processing device 100 or the third processing device 500, asymmetric deformation will occur at the intersection of the corrugated sheet with dual transverse corrugations.

[0122] The second lower mold 220 has a second recessed portion 270 corresponding to the second shaping protrusion 250 for receiving the second shaping protrusion 250 . A feature 280 corresponding to the pattern feature structure 260 is formed on the second recessed portion 270 .

[0123] Referring to Figures 8-14 , the third processing device 500 of the present invention also has several advantages over conventional processing devices. First, referring to Figures 8 and 9 , the third processing device 500 comprises a third upper mold and a third lower mold 53. The third lower mold 53 comprises a pair of sliding plates 50 arranged side by side in a transverse direction. The third upper mold comprises a pair of third holddown plates 60 arranged side by side in a transverse direction, a third shaping protrusion 81, and a driving mechanism. The pair of sliding plates 50 can move away from and toward each other in a transverse direction. The pair of third holddown plates 60 are positioned on top of the pair of sliding plates 50, respectively, thereby compressing the corrugated sheet material between the pair of sliding plates 50 and the pair of third holddown plates 60. The third shaping protrusion 81 is positioned between the pair of third holddown plates 60. The bottom end of the third shaping protrusion 81 has a third predetermined shaping profile with its transverse dimension tapering toward the bottom. The driving mechanism comprises a sliding plate driving portion that contacts the pair of sliding plates 50 and a third shaping protrusion driving portion connected to the third shaping protrusion 81.

[0124] The drive mechanism may include a main horizontal plate 71 and a vertical plate 72 connected as one body. The vertical plate 72 extends downward from the center of the main horizontal plate 71 in the transverse direction. The sliding plate driving portion is, for example, a drive block 77, the top of which is fixed to the main horizontal plate 71. A third shaping protrusion 81 is integrally formed at the bottom end of the vertical plate 72. There are multiple drive blocks 77, which are arranged in two rows. The two rows of drive blocks 77 are positioned laterally outward from the pair of third press plates 60. Force-bearing portions 51 corresponding to the drive blocks 77 are mounted on the laterally outward sides of the pair of sliding plates 50. The surface of the drive block 77 that applies force to the force-bearing portion 51 is an inclined surface 771, and the surface of the force-bearing portion 51 facing the inclined surface is also an inclined surface. The inclined surface contact enables the motion of the drive block 77 to be converted into lateral movement of the sliding plate 50 when it moves vertically downward.

[0125] Specifically, when the driving mechanism drives the third shaping protrusion 81 to move downward at a uniform speed, the inclined surface of the driving block 77 contacts the force-bearing portion 51 of the sliding plate 50, causing the sliding plate 50 as a whole to move at a uniform speed. Alternatively, the inclined surface can be an irregular inclined surface, in which case the uniform downward movement of the driving block 77 may be converted into a lateral variable speed movement of the sliding plate 50. The third lower mold 53 also includes a limiter 54 positioned on the lateral outer side of the two rows of driving blocks 77. When the driving mechanism moves downward, the limiter 54 contacts the corresponding lateral outer surface of the driving block 77. The limiters 54 are two rows of limiters corresponding to the two rows of driving blocks 77, and a first slider 55 or roller is installed on the surface of each limiter 54 that contacts the driving block 77. The driving action of the two rows of driving blocks 77 can reduce the thinning rate of the blank plate.

[0126] The pair of third pressing plates 60 are connected to the bottom of the main horizontal plate 71, and the pair of third pressing plates 60 can approach each other in the horizontal direction under the action of the driving mechanism. Referring to Figures 12 and 13, the longitudinal ends of the pair of third pressing plates 60 are provided with guide rail grooves extending in the horizontal direction, and the main horizontal plate 71 is provided with guide rails 631 accommodated in the guide rail grooves. The guide rails 631 are provided on the guide rail brackets 63, and the pair of third pressing plates 60 are suspended below the main horizontal plate 71 through the cooperation of the guide rails 631 and the guide rail grooves. Similarly, in order to enable the pair of sliding plates 50 to move laterally, the longitudinal ends of the pair of sliding plates 50 are also provided with guide rail grooves 58.

[0127] The drive mechanism also includes a pair of intermediate horizontal plates 73 positioned between the pair of third blank pressing plates 60 and the main horizontal plate 71. The pair of third blank pressing plates 60 are connected to the main horizontal plate 71 via the pair of intermediate horizontal plates 73. The pair of intermediate horizontal plates 73 are fixed horizontally relative to the pair of third blank pressing plates 60 and vertically relative to the main horizontal plate 71. The intermediate horizontal plates 73 abut against the lower surface of the main horizontal plate 71. In other words, in the vertical direction, the intermediate horizontal plates 73 continuously abut against the lower surface of the main horizontal plate 71 and are fixed relative to the main horizontal plate 71, but are movable relative to the third blank pressing plates 60. In a horizontal plane (defined by the transverse and longitudinal directions), the intermediate horizontal plates 73 are fixed relative to the third blank pressing plates 60 but movable relative to the main horizontal plate 71, and can move laterally relative to the main horizontal plate 71 along with the third blank pressing plates 60. In order to facilitate the intermediate horizontal plate 73 to slide relative to the main horizontal plate 71 while being in close contact with the bottom surface of the main horizontal plate 71 , a second sliding block 78 is provided between the intermediate horizontal plate 73 and the main horizontal plate 71 .

[0128] With reference to Figures 12 and 13, a laterally extending spring member 79 is further provided between the third press plate 60 and the main horizontal plate 71. One function of the spring member 79 is to act as a reset spring, for resetting the pair of third press plates 60 relative to each other after machining is completed. Optionally, the spring member 79 can also serve as a driving member for driving the intermediate horizontal plate 73, thereby driving the third press plate 60. In this case, one end of the spring member 79 abuts against the first abutment 62, and the other end of the spring member 79 abuts against the second abutment 61. The first abutment 62 is fixed relative to the intermediate horizontal plate 73, and the second abutment 61 is fixed relative to the main horizontal plate 71 (for example, the second abutment 61 is fixed to the vertical plate 72). An opening is formed on the intermediate horizontal plate 73 to receive the second abutment 61 and allow it to slide therein. The spring member 79 may be a time-delay spring. After the third pressing plate 60 drops to a position where it engages with the sliding plate 50, the spring member 79 begins to apply force to the first abutting portion 62, thereby squeezing the pair of third pressing plates 60 toward the middle. Alternatively, the first abutting portion 62 and the second abutting portion 61 may be installed in reverse. The spring member 79 is not used as a member for actuating the pair of third pressing plates 60 toward each other, but is used as a member for biasing the pair of third pressing plates 60 away from each other after processing is completed.

[0129] It will be understood that the third shaping protrusion driving unit and the sliding plate driving unit are fixed relative to each other, the third shaping protrusion driving unit and the third shaping protrusion 81 are fixedly connected, and the sliding plate driving unit drives the sliding plate 50 by frictional contact. This arrangement results in that, although the movement speed and direction of the third shaping protrusion driving unit and the sliding plate driving unit are consistent, the movement speed and direction of the third shaping protrusion 81 and the sliding plate 50 are different. The speed at which the pair of sliding plates 50 move laterally toward each other under the action of the drive mechanism is referred to as the first predetermined speed, and the speed at which the drive mechanism (e.g., the main horizontal plate) moves downward is referred to as the second predetermined speed. The pair of third press plates 60 can also move laterally toward each other under the drive mechanism, and this speed is referred to as the third predetermined speed. The first predetermined speed, the second predetermined speed, and the third predetermined speed are specifically related to the predetermined forming profile of the intersection of the transverse corrugations and the longitudinal corrugations.

[0130] In addition to the aforementioned laterally extending spring member 79, the driving mechanism can have a variety of other options for the driving mode of a pair of the third blank pressing plates 60. For example, in other embodiments, the pair of the third blank pressing plates are driven by the pair of sliding plates, that is, the driving mechanism indirectly drives the third blank pressing plate by driving a pair of sliding plates. In this case, there can be a coupling feature between the third blank pressing plate and the sliding plate, and the coupling feature allows the third blank pressing plate and the sliding plate to separate in the vertical direction, but limits the lateral separation of the two under the fitted state. Alternatively, the driving mechanism includes a blank pressing plate driving portion that is different from the spring member 79 and applies force to the pair of the third blank pressing plates, and the blank pressing plate driving portion is independent of the sliding plate driving portion or is formed into one with the sliding plate driving portion. When the blank pressing plate driving portion and the sliding plate driving portion are formed into one, an inclined surface can also be provided on the inner side of the driving block, and when the inclined surface at its bottom applies force to the sliding block, the inclined surface on its inner side applies force to the third blank pressing plate.

[0131] Preferably, the third upper mold is also constructed to allow a pair of third pressing plates 60 to move vertically along with the main horizontal plate 71; and to allow the main horizontal plate 71 and the intermediate horizontal plate 73 to move vertically relative to the pair of third pressing plates 60 when the pair of third pressing plates 60 abut against the top side of a pair of sliding plates 50.

[0132] The third upper die may include a pressure-source nitrogen gas spring 74 disposed between the intermediate horizontal plate 73 and the pair of third blank holders 60. The pressure-source nitrogen gas spring 74 is configured to be locked when at its maximum stretched length to allow the pair of third blank holders 60 to vertically move along with the main horizontal plate 71 and the intermediate horizontal plate 73. The top end of the pressure-source nitrogen gas spring 74 is fixed to the intermediate horizontal plate 73, and the bottom end of the pressure-source nitrogen gas spring 74 is fixed to the pair of third blank holders 60.

[0133] When it is necessary to lift the third pressing plate 60, the drive mechanism can be actuated to move it upward. In the first stage of the process of the driving mechanism moving upward, the main horizontal plate 71 and the intermediate horizontal plate 73 move upward relative to the third pressing plate 60, and the pressure source nitrogen spring 74 returns to its original length between the intermediate horizontal plate 73 and the third pressing plate 60. When the pressure source nitrogen spring 74 is stretched to its maximum length, the upward movement process of the driving mechanism (which can be understood as the upward movement process of the main horizontal plate 71) enters the second stage. In the second stage of the driving mechanism moving upward, the third pressing plate 60 moves upward together with the main horizontal plate 71 and the intermediate horizontal plate 73, and the third pressing plate 60 moves upward away from the sliding plate 50, allowing the operator to place the blank plate between the third pressing plate 60 and the sliding plate 50.

[0134] After the blank sheet is placed between the third blank holder 60 and the sliding plate 50, the drive mechanism can be activated to move it downward. During the first phase of the drive mechanism's downward movement, the pressure source nitrogen gas spring 74 is at its maximum extended length, and the third blank holder 60 is actuated by the drive mechanism to move downward with the drive mechanism. When the third blank holder 60 abuts the top surface of the sliding plate 50, the drive mechanism's downward movement (which can be understood as the downward movement of the main horizontal plate 71) enters the second phase. During this second phase, the third blank holder 60 no longer moves vertically. The drive mechanism, along with the intermediate horizontal plate 73 and the main horizontal plate 71, moves downward relative to the third blank holder 60, compressing the pressure source nitrogen gas spring 74. The second phase ends when the pressure source nitrogen gas spring 74 reaches its minimum length (i.e., when it is maximally compressed). It should be noted that the pressure source nitrogen gas spring 74 is mounted in an inverted configuration. When installed, its top faces downward and its bottom faces upward.

[0135] During the second phase of the downward movement of the drive mechanism, the third shaping protrusion 81, the sliding plate 50, and the third blank holding plate 60 move under the action of the drive mechanism and shape the blank. In other words, the first phase of the downward movement of the drive mechanism drives the third blank holding plate 60 downward; the second phase of the downward movement of the drive mechanism drives the third shaping protrusion 81 downward, drives the pair of sliding plates 50 and the pair of third blank holding plates 60 together, and causes them to move laterally toward the center.

[0136] The bottom surface of the third blank holder 60 is provided with protrusions 76 corresponding to the transverse corrugations on the blank. The protrusions 76 are arranged in two groups, arranged longitudinally. A characteristic structure corresponding to the pattern feature is provided on the protrusions 76 adjacent to the third shaping protrusions 81. The characteristic structure includes a positioning protrusion that is configured to penetrate into a corresponding recessed portion of the pattern feature on the blank, such as the recessed portion formed corresponding to the notch in Figures 7A-7C. The coordination of the positioning protrusion and the recessed portion facilitates the positioning and securing of the blank, preventing the blank from shifting during processing. Furthermore, in the first stage of the processing, the corresponding recessed portion on the blank can be positioned using the positioning protrusions. Then, in the second stage, the third shaping protrusions 81 are driven downward, driving the pair of sliding plates 50 and the pair of third blank holders 60 to move them laterally toward the center. This solution can reduce the thinning rate of the blank.

[0137] Correspondingly, the third lower die 53 has a third transverse recess 56 and a third longitudinal recess 57. In the present invention, the longitudinal corrugation forming base does not have an upwardly movable shaping base. Instead, it is provided with a third longitudinal recess 57 fixed in the height direction. This enhances a certain degree of forming freedom. When the blank sheet, which has undergone the first two steps, is pressed by the third shaping protrusion 81 and fits into the third longitudinal recess 57, a corrugated sheet with a desired predetermined shape and profile can be formed. This arrangement reduces the external forces acting on the blank sheet (it is no longer subject to the upward force of the shaping base), further reducing the thinning rate.

[0138] The above setting associates the lateral movement speed (first predetermined speed) of a pair of sliding plates 50, the downward movement speed (second predetermined speed) of the third shaping protrusion 81 and the lateral movement speed (third predetermined speed) of a pair of third pressing plates 60, and this association is specific to the predetermined forming profile of the intersection of the lateral corrugation and the longitudinal corrugation.

[0139] In addition to the above embodiments, the drive mechanism may also have other configurations to achieve a specific correlation between the first predetermined speed, the second predetermined speed, and the third predetermined speed with respect to the predetermined forming profile of the intersection portion. For example, the drive mechanism may be fixedly connected to the sliding plate and / or the third pressing plate, and / or connected to the third shaping protrusion in a rolling or sliding friction manner; the drive mechanism itself may include a non-fixed linkage mechanism, for example, the drive mechanism may include a first drive part, a second drive part, and a third drive part, the movement directions and / or speeds of the first drive part, the second drive part, and the third drive part are different, the first drive part may be connected to the sliding plate, the second drive part may be connected to the third shaping protrusion, and the third drive part may be connected to the third pressing plate; the drive mechanism may include a control module, and the control module may be programmed to drive the sliding plate to move closer to each other at a first predetermined speed while driving the third shaping protrusion to move downward at a second predetermined speed and driving the third pressing plate to move closer to each other at a third predetermined speed.

[0140] In the third processing device 500 of the present invention, it is ensured that the third pressing plate 60 can move vertically relative to the main horizontal plate 71, and a pair of third pressing plates 60 can be squeezed laterally toward the third shaping protrusion 81. This arrangement enables the third pressing plate 60 to simultaneously achieve two functions: positioning the blank plate and shaping the blank plate.

[0141] The operation process of the third processing device 500 will be described below with reference to FIG. 8 to FIG. 13 .

[0142] When the third processing device 500 is needed after the second processing device 200, the drive mechanism can be first actuated to move the drive mechanism upward to lift the third press plate 60. Specifically, in the first stage of the drive mechanism's upward movement, the pressure source nitrogen spring 74 returns to its original length, the third press plate 60 remains stationary, and the main horizontal plate 71 and the intermediate horizontal plate 73 move upward relative to the third press plate 60; in the second stage of the drive mechanism's upward movement (which can be understood as the main horizontal plate 71 moving upward), the pressure source nitrogen spring 74 is at its longest stretched length, the drive mechanism drives the third press plate 60 upward, and the third press plate 60 moves upward away from the sliding plate 50. In addition, at this time, it is also necessary to move the pair of sliding plates 50 laterally away from each other, and the pair of third press plates 60 laterally away from each other.

[0143] Subsequently, the operator places the blank plate into the gap between the sliding plate 50 and the third pressing plate 60, and ensures that the transverse corrugations of the blank plate are located exactly within the recessed portion and pressed against by the corresponding shape of the protrusion 76. The drive mechanism is then actuated to move the drive mechanism downward. In the first stage of the downward movement of the drive mechanism, the pressure source nitrogen spring 74 is at its maximum extension length, and the third pressing plate 60 moves downward together with the main horizontal plate 71 and the intermediate horizontal plate 73 until the third pressing plate 60 abuts against the top side of the sliding plate 50. At this time, the flat portion of the blank plate and the pair of recessed portions on the transverse corrugations are pressed tightly by the third pressing plate 60 and the sliding plate 50.

[0144] The drive mechanism then continues to move downward, marking the second stage of the drive mechanism's downward movement. During this second stage, the pressure source nitrogen spring 74 is compressed, and the drive mechanism can no longer actuate the third blank holder 60 downward. The second stage of the drive mechanism's actuation (i.e., the second stage of the main horizontal plate 71's downward movement) primarily actuates the third shaping protrusion 81 downward and laterally actuates the sliding plate 50 and the third blank holder 60.

[0145] In the second stage of the actuation of the drive mechanism, the third shaping protrusion 81 fixedly mounted at the bottom end of the vertical plate 72 of the drive mechanism moves downward with the drive mechanism at a second predetermined speed. At the same time, the contact of the driving block 77 of the drive mechanism pushes the force-bearing portion 51 of the sliding plate 50. When the drive mechanism moves downward at the second predetermined speed, the pair of sliding plates 50 approach each other at a first predetermined speed. At the same time, the delayed spring member 79 begins to act, so that the pair of third press plates 60 also approach each other. Alternatively, the third press plates 60 approach each other under the drive of the pair of sliding plates 50 or under the direct drive of the drive mechanism. Wherein, the first to third predetermined speeds are specifically related, and "specifically related" means that the correlation between the second predetermined speed, the first predetermined speed and the third predetermined speed is specially set for the predetermined forming profile of the intersection. This special setting is, for example, to consider the concave-convex morphology of the intersection, and a larger speed is set in the corresponding period when a sharp deformation is required, and a smaller speed is set in the corresponding period when a gentle deformation is required.

[0146] During the second stage of drive mechanism activation, the pair of third press plates 60, the third shaping protrusions 81, and the pair of slide plates 50 work together to compress the blank sheet into the predetermined longitudinal corrugations and intersections. The speeds of the various components moving in different directions to extrude the blank sheet are specifically correlated, making the forming process particularly suitable for corrugated sheet with the predetermined corrugated shape. Furthermore, the pattern features formed by the second processing device create predetermined weak points in the transverse corrugations of the blank sheet, enabling the intersection of the longitudinal and transverse corrugations to deform and form toward the predetermined shape during processing by the third processing device.

[0147] At the end of the second stage of the actuation of the drive mechanism, the pair of sliding plates 50 are at their closest relative positions, the pair of third pressing plates 60 are also at their closest relative positions, and the third shaping protrusions 81 are pressed between the pair of sliding plates 50. At this time, the pressure source nitrogen spring 74 is at its shortest position.

[0148] The first to third predetermined speeds can be uniform or non-uniform. For example, during the first stage of the downward movement of the driving mechanism, the main horizontal plate 71 as a whole can have a uniform downward speed. During the second stage of the downward movement of the main horizontal plate 71, due to the reaction force of the pressure source nitrogen gas spring 74, the downward movement speed, i.e., the speed of the driven third shaping protrusion 81 (the second predetermined speed), can also be variable, such as a gradually decelerating speed. Alternatively, in other embodiments, the control system for controlling the downward movement of the driving mechanism can be pre-programmed and execute such operating logic: during the second stage, the force acting on the driving mechanism is gradually increased, and this increased force can be balanced with the reaction force of the pressure source nitrogen gas spring 74, so that the driving mechanism still maintains a uniform downward speed during the second stage. In other words, the speed of the driven third shaping protrusion 81 (the second predetermined speed) can still be substantially uniform. Regardless of whether the downward movement speed of the third shaping protrusion 81 in the second stage is uniform, the movement speed of the sliding plate 50 can be linearly related to the second predetermined speed. For example, when the second predetermined speed is non-uniform, the first predetermined speed and the third predetermined speed are also non-uniform; when the second predetermined speed is uniform, the first predetermined speed and the third predetermined speed are also uniform. Alternatively, the force-applying inclined surface of the driving block 77 can be set as an irregular inclined surface, so that the first predetermined speed and the third predetermined speed can be non-linearly related to the second predetermined speed. For example, when the second predetermined speed is uniform, the first predetermined speed and the third predetermined speed can be non-uniform.

[0149] It should be noted that the "speed" mentioned in the present invention should be understood as the size of the rate value of the speed. For example, the "first predetermined speed is not equal to the second predetermined speed" mentioned in the present invention means that at any time node, the rate value of the transient first predetermined speed is not equal to the rate value of the transient second predetermined speed.

[0150] As can be seen from the above embodiments, the drive mechanism of the third processing device of the present invention is uniquely configured for the desired corrugated shape. Specifically, the speeds of the various components moving in different directions to extrude the blank sheet are specifically correlated, making the forming process particularly suitable for corrugated sheet with the desired corrugated shape. Corrugated sheet produced using this process exhibits excellent material uniformity, smoothness, and strength at the formed corrugations, particularly at the intersection of the transverse and longitudinal corrugations.

[0151] It should be noted that the first processing device and the second processing device of the present invention both have two shaping protrusions parallel to each other, and the third processing device has two protrusions correspondingly. The corrugated plate processed by such a processing system has two transverse corrugations, thereby having two intersecting parts. Such corrugated plates have more uses than traditional corrugated plates. For example, the corrugated plates can be bent appropriately so that they can be used at the corners of storage containers to avoid liquid leakage at the corners. It can be understood that the two-row sliding block drive unit of the third processing device of the present invention is particularly suitable for processing such corrugated plates with a long longitudinal length. The two-row sliding block drive unit can apply force evenly, so that the sliding block and the pressure plate can move at a relatively uniform speed. In addition, it can also be understood that in other embodiments not shown, the first processing device, the second processing device and the third processing device can also be provided with other numbers (for example, three or four, etc.) of shaping protrusions or protrusions so that the corrugated plate has other corresponding numbers of transverse corrugations.

[0152] The following mainly describes a method for manufacturing a corrugated board according to a preferred embodiment of the present invention with reference to FIG. 15 .

[0153] The method for manufacturing a corrugated board according to the present invention comprises the following steps which are performed in sequence:

[0154] First, step S1 is performed, that is, using the first processing device 100 to form two transverse corrugations spaced apart along the longitudinal direction of the blank plate on the blank plate.

[0155] Preferably, in step S1, the middle upper pressing plate 131 is first driven to move toward the first lower pressing plate 140 to press the corresponding middle portion of the blank, and then the end upper pressing plate 132 and at least two first shaping protrusions 150 are driven to move toward the first lower pressing plate 140 to form transverse corrugations on the blank. This arrangement can, on the one hand, prevent the blank from shifting relative to the first processing device 100, thereby improving processing accuracy; on the other hand, it can ensure the overall thickness and uniformity of the blank, thereby preventing it from being stretched and thinned during processing.

[0156] After step S1 , step S2 may be performed, that is, the blank plate formed in step S1 is moved to the second processing device 200 , and pattern features are formed on the two transverse corrugations of the blank plate respectively by using the second processing device 200 .

[0157] Specifically, in step S2, the second upper blank holder 230 can be driven to move toward the second lower blank holder 240 to form a pattern feature on the transverse corrugation. The specific structure of the pattern feature has been described in detail above and will not be repeated here for the sake of brevity.

[0158] After step S2, step S3 can be performed, that is, the blank plate with pattern features formed in step S2 is moved to the third processing device 500, and the third processing device 500 is used to form longitudinal corrugations and two intersection parts on the blank plate, and the two intersection parts are respectively formed at the intersection of the longitudinal corrugations and the two transverse corrugations.

[0159] Preferably, in step S3, before forming the longitudinal corrugations and the two intersecting portions, the planar portion of the blank plate and the pair of concave portions corresponding to the pair of cutout portions on the transverse corrugations are first pressed to position the blank plate. This step can be accomplished by controlling the operation of the drive mechanism.

[0160] Specifically, in a preferred embodiment, in the first stage of the downward movement of the driving mechanism, the third pressing plate 60 is driven downward so that the blank plate is pressed between the third pressing plate 60 and the sliding plate 50, wherein the recessed portion on the blank plate is pressed to achieve relative fixation of its position; in the second stage of the downward movement of the driving mechanism, a pair of sliding plates 50 are moved closer to each other at a first predetermined speed, and at the same time, the third shaping protrusion 81 is moved downward at a second predetermined speed, and a pair of third pressing plates 60 are moved closer to each other at a third predetermined speed to extrude and form longitudinal corrugations, and form an intersection at the intersection of the longitudinal corrugations and the transverse corrugations.

[0161] The specific operation process of the third processing device has been described in detail above and will not be repeated here for the sake of brevity.

[0162] In the present invention, the method for manufacturing a corrugated plate includes three processing steps performed in sequence. The structural morphology of the intersection of the transverse corrugations and the longitudinal corrugations of the formed corrugated plate is mainly determined by the pattern features processed by the second processing device on the transverse corrugations of the blank plate. By pre-pressing pattern features with weak points and strengthening points on the transverse corrugations of the blank plate, the structural stability and shape controllability of the intersection formed in the subsequent steps can be improved. In addition, the processing of the special structural morphology of the intersection is independent of the processing of the transverse corrugations. Compared with the traditional solution of processing a characteristic structure at the center of the transverse corrugations while processing the transverse corrugations, the present invention processes the characteristic structure at the center of the already formed transverse corrugations, and the forming of the characteristic structure is independent of the forming of the transverse corrugations. Compared with using a flat blank plate as a processing base, the present invention uses formed transverse corrugations as a processing base, which can make the forming of the characteristic structure more precise and more conducive to the configuration of the final intersection.

[0163] The above description of various embodiments of the present invention is provided for the purpose of description to one of ordinary skill in the relevant art. It is not intended to exclude or limit the present invention to a single disclosed embodiment. As above, a person of ordinary skill in the field of the above teachings will understand the various substitutions and variations of the present invention. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all substitutions, modifications and variations of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention described above.

Claims

1. A method for manufacturing a corrugated board, characterized in that: The method comprises the following steps which are carried out in sequence: S1 forming transverse corrugations extending in the transverse direction of the blank plate on the blank plate; S2 forms pattern features on the transverse corrugations; as well as S3 forms longitudinal corrugations and intersections on the blank plate, wherein the intersections are formed at intersections of the longitudinal corrugations and the transverse corrugations, and a shape of the intersection is specifically related to a shape of the pattern feature.

2. The method according to claim 1, characterized in that Steps S1, S2 and S3 are sequentially performed in the first processing device, the second processing device and the third processing device.

3. The method according to claim 2, characterized in that The method further comprises: In step S1 , at least two transverse corrugations spaced apart in the longitudinal direction of the blank are formed on the blank.

4. The method according to claim 3, characterized in that The first processing device includes a first upper pressing plate (130) and a first lower pressing plate (140) that are separable from each other, the first upper pressing plate includes at least two spaced-apart first shaping protrusions, the bottom end of the first shaping protrusion has a first predetermined forming contour with a longitudinal dimension tapering toward the bottom side, and the first predetermined forming contour is smooth, the first lower pressing plate includes at least two spaced-apart first recessed portions, the shape of the first recessed portion matches the shape of the first shaping protrusion, and the first shaping protrusion and the first recessed portion cooperate with each other to form the transverse corrugations.

5. The method according to claim 4, characterized in that The first upper pressing plate comprises an intermediate upper pressing plate (131) and end upper pressing plates (132) positioned on both sides of the intermediate upper pressing plate, and the first shaping protrusions (150) extend along the intersection positions of the intermediate upper pressing plate (131) and the end upper pressing plates (132). The step S1 further includes: first driving the middle upper pressing plate (131) to move toward the first lower pressing plate to press the corresponding middle part on the blank plate, and then driving the end upper pressing plate (132) and at least two of the first shaping protrusions (150) to move toward the first lower pressing plate to form the transverse corrugations on the blank plate.

6. The method according to claim 2, characterized in that The second processing device includes a second upper pressing plate (230) and a second lower pressing plate (240) that are separable from each other, the second upper pressing plate includes at least two spaced-apart second shaping protrusions (250), the bottom end of the second shaping protrusion has a second predetermined forming profile with a longitudinal dimension gradually decreasing toward the bottom side, and the second shaping protrusion has a pattern feature structure (260) at the transverse center position, and the pattern feature structure is constructed to shape the pattern feature on the transverse corrugation of the blank plate, the second lower pressing plate includes at least two spaced-apart second recessed portions (270), the shape of the second recessed portions matches the shape of the second shaping protrusion (250), and a feature (281) corresponding to the pattern feature structure (260) is formed on the second recessed portion. The step S2 further includes: driving the second upper blank holder to move toward the second lower blank holder to form the pattern features on the transverse corrugations.

7. The method according to claim 6, characterized in that The pattern characteristic structure (260) includes: a pair of recessed portions (263) symmetrically arranged in the transverse direction about the center (261) of the bottom surface of the pattern feature structure and located on the side surface of the second shaping protrusion; A pair of cutouts (262) are longitudinally symmetrically arranged about the center of the bottom surface of the pattern feature structure and located on the bottom surface of the second shaping protrusion. The recessed depth of the pair of cutout portions (262) is greater than the recessed depth of the pair of recessed portions (263), and the pair of recessed portions are located between the pair of cutout portions in the longitudinal direction.

8. The method according to claim 7, characterized in that The pattern feature structure (260) also includes a bulge formed at the center of the bottom surface and four pits (264) arranged around the bulge on the bottom surface, two of the four pits are symmetrical about the bulge in the longitudinal direction, and the other two pits are symmetrical about the bulge in the transverse direction, and the bulge and the four pits are located between the pair of cutouts in the longitudinal direction.

9. The method according to claim 8, characterized in that The method further comprises: In step S3, before forming the longitudinal corrugations and the intersection portion, at least the concave portions on the blank plate corresponding to the pair of cutout portions are compressed.

10. The method according to claim 9, characterized in that The third processing device (500) comprises: a pair of sliding plates (50), the pair of sliding plates being capable of moving away from and approaching each other in a transverse direction (D2); a pair of third pressing plates (60), the pair of third pressing plates being correspondingly located on the top sides of the pair of sliding plates (50) to press the blank plate tightly between the pair of sliding plates (50) and the pair of third pressing plates (60); a third shaping protrusion (81), the third shaping protrusion being located between the pair of sliding plates (50) and extending longitudinally, the bottom end of the third shaping protrusion having a third predetermined shaping profile with a transverse dimension gradually decreasing toward the bottom side, the third predetermined shaping profile being smooth; A driving mechanism, comprising: Two rows of sliding plate driving parts, the two rows of sliding plate driving parts are respectively positioned on the lateral outsides of the pair of third pressing plates (60), and each row of the sliding plate driving parts has a plurality of parts; and a third shaping protrusion driving portion connected to the third shaping protrusion, The third shaping protrusion driving unit and the sliding plate driving unit are linked, so that when the sliding plate driving unit drives the pair of sliding plates (50) to move closer to each other, the third shaping protrusion driving unit drives the third shaping protrusion (81) to move downward.

11. The method according to claim 10, characterized in that The bottom of the third pressing plate (60) is provided with two groups of protrusions (76) corresponding to the transverse corrugations formed on the blank plate, and the two groups of protrusions are arranged in the longitudinal direction. The positions of the protrusions adjacent to the third shaping protrusions (81) are provided with characteristic structures (761) corresponding to the pattern features, wherein the characteristic structures include positioning protrusions, and the positioning protrusions are used to penetrate into the concave portion on the corresponding pattern feature on the blank plate.

12. The method according to claim 10, characterized in that The lower surface of the third pressing plate is closer to the sliding plate than the lowermost end of the third shaping protrusion.

13. The method according to claim 11, characterized in that The method further comprises running the drive mechanism downwards in step S3, wherein: In a first stage of downward movement of the driving mechanism, the third pressing plate is driven downward so that the blank plate is pressed between the third pressing plate and the sliding plate, wherein the concave portion on the blank plate is pressed; In the second stage of the downward movement of the driving mechanism, the pair of sliding plates are approached to each other at a first predetermined speed, while the third shaping protrusion is moved downward at a second predetermined speed, and the pair of third pressing plates are approached to each other at a third predetermined speed to form the longitudinal corrugations and the intersection portion.

14. The method according to claim 13, characterized in that The first predetermined speed, the second predetermined speed, and the third predetermined speed are specifically related to a predetermined profile of the intersection portion.

15. The method according to claim 13, characterized in that The driving mechanism comprises a main horizontal plate (71) and a vertical plate (72) connected as one body, wherein the vertical plate (72) extends downward from the center of the main horizontal plate in the transverse direction (D2), wherein: The sliding plate driving portion is a driving block (77), the top of the driving block is fixed on the main horizontal plate (71), and a force-bearing portion (51) corresponding to the driving block is installed on the lateral outer side of the sliding plate (50), and the driving block and the force-bearing portion are in contact with each other through an inclined surface (771); the third shaping protrusion (81) is fixed to the bottom end of the vertical plate (72), The method further includes: in a second stage of the downward movement of the driving mechanism, moving the main horizontal plate downward to drive the vertical plate downward and causing the driving block to contact the force-bearing portions on the outer sides of the pair of sliding plates.

16. The method according to claim 15, characterized in that The pair of third press plates are driven by the pair of slide plates.

17. The method according to claim 15, characterized in that Further including: In the first stage of the downward movement of the driving mechanism, a pressure source nitrogen spring (74) arranged between the main horizontal plate (71) of the driving mechanism and a pair of third pressing plates for pressing above the blank plate is controlled to make the pair of third pressing plates move vertically with the main horizontal plate.

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