Die cutting device and method for performing indentation forming operation and slitting operation on sheet adopting offset printing

Abstract

The invention relates to a die cutting device which comprises a longitudinal indentation forming device, at least one longitudinal slitting device, an aligning device, a transverse indentation forming device and a transverse cutting device, and the longitudinal indentation forming device forms at least two sets of longitudinal indentations on a sheet conveyed to the longitudinal indentation forming device in the longitudinal direction. At least one longitudinal slitting device is used for longitudinally slitting the sheet with the longitudinal indentations so as to form separated single sub-sheets, each single sub-sheet is provided with a group of longitudinal indentations, and an aligning device is used for mutually aligning patterns on at least two single sub-sheets along the transverse direction; the transverse indentation forming device forms transverse indentations on the at least two aligned single sub-sheets, and the transverse cutting device transversely cuts the at least two single sub-sheets with the transverse indentations so as to form a plurality of separated products with the transverse indentations and the longitudinal indentations. According to the die cutting device, products of different specifications can be produced through one set of die, and the efficiency of the production process is improved.

Description

Technical Field

[0001] The present application relates to a die-cutting device and a method for performing embossing and slitting operations on a sheet material with misprinted printing, and in particular to a die-cutting device capable of gradient (misprinted) alignment and a method for performing embossing and slitting operations on a sheet material with misprinted printing. Background Art

[0002] In the process of flexographic printing, in order to improve printing efficiency, multiple repeated patterns of the product are usually printed on the sheet at one time, and the raised parts of the printing roller corresponding to these repeated printed patterns are regularly distributed on the circumferential surface of the printing roller in a certain arrangement. In order to keep the printing roller in full contact with the sheet at all times, the prior art mostly adopts gradient typesetting or staggered typesetting for relief printing. The use of gradient typesetting printing can make the multiple raised parts on the printing roller used to form multiple repeated printed patterns and located at different axial positions of the printing roller evenly arranged on the outer surface of the printing roller along the circumference of the printing roller, ensuring that during the rotation of the printing roller, the printing roller always has a raised part in contact with the sheet, so as not to cause resonance and overprinting. If the gradient typesetting method is not used for relief printing, that is, the raised parts of the printing roller used to form the relief printing pattern are arranged flush along the axial direction on the surface of the printing roller, then the printing roller will have resonance and jumping problems during the printing process, which is not conducive to the printing operation.

[0003] The die-cutting device is used to process the printed sheet to form a single packaged product, which can contain the liquid to be packaged, such as milk, juice, etc. Specifically, the die-cutting device can form an indentation on the printed sheet that is subsequently used as a fold, and is used to cut the sheet into separate single packaged products. Summary of the invention

[0004] According to a first aspect of the present application, a die-cutting device is provided for performing an indentation forming operation and a slitting operation on a sheet material with misprinted printing, and is characterized in that it comprises a longitudinal indentation forming device, at least one longitudinal slitting device, an alignment device, a transverse indentation forming device and a transverse cutting device, wherein the longitudinal indentation forming device is configured to form at least two groups of longitudinal indentations on the sheet material conveyed to the longitudinal indentation forming device in the longitudinal direction, wherein the at least two groups of longitudinal indentations are repeated in the transverse direction; the at least one longitudinal slitting device is configured to form at least two groups of longitudinal indentations on the sheet material conveyed to the longitudinal indentation forming device in the longitudinal direction, wherein the at least two groups of longitudinal indentations are repeated in the transverse direction; and the at least one longitudinal slitting device is configured to perform a longitudinal indentation forming operation on the sheet material conveyed to the longitudinal indentation forming device in the longitudinal direction. The sheet is longitudinally slit to form at least two separate single sub-sheets, wherein each single sub-sheet has one of the at least two groups of longitudinal indentations; the alignment device is configured to align the patterns on the at least two single sub-sheets with each other in the transverse direction; the transverse indentation forming device is configured to form transverse indentations on the at least two aligned single sub-sheets; the transverse cutting device is configured to transversely cut the at least two single sub-sheets with the transverse indentations to form a plurality of separate products with transverse and longitudinal indentations.

[0005] According to the first aspect of the present application, the alignment device includes at least two offset rollers, which are configured to be staggered along the longitudinal direction and respectively define different travel paths from the at least one longitudinal slitting device to the transverse indentation forming device for the at least two single sub-sheets, and the different travel paths have different travel distances.

[0006] According to the first aspect of the present application, the longitudinal indentation forming device is a rolling device, which includes a plurality of longitudinal indentation upper rollers and a plurality of longitudinal indentation lower rollers, wherein the plurality of longitudinal indentation upper rollers and the plurality of longitudinal indentation lower rollers are configured to be movably arranged parallel to each other in the transverse direction so that the axial spacing between the longitudinal indentation forming devices can be adjusted.

[0007] According to a first aspect of the present application, the at least one longitudinal slitting device comprises a plurality of longitudinal slitting devices, which are movably arranged parallel to each other in the transverse direction so that the spacing between the plurality of longitudinal slitting devices is adjustable.

[0008] According to the first aspect of the present application, each of the longitudinal indentation forming device, the at least one longitudinal slitting device, the transverse indentation forming device, the transverse cutting device and the clamping roller has a pair of upper rollers and lower rollers, wherein the spacing between the pairs of upper rollers and lower rollers of the longitudinal indentation forming device and the transverse indentation forming device is adjustable, which can be used to adjust the depth of the indentation.

[0009] According to a first aspect of the present application, a nip roller is configured to keep the at least two single sub-sheets output from the alignment device under tension and enter the transverse impression forming device in the same orientation.

[0010] According to the first aspect of the present application, the transverse cutting device has at least one pair of transverse cutting knives, and the at least one pair of transverse cutting knives can cover the at least two single sub-sheets in the transverse direction, so as to simultaneously perform transverse cutting on the at least two single sub-sheets.

[0011] According to the first aspect of the present application, a control device is provided, which can be used to adjust the spacing between the longitudinal indentation forming devices, the spacing between the multiple longitudinal slitting devices, the moving distance of the at least two offset rollers, and the spacing between the upper and lower rollers of each pair of the longitudinal indentation forming devices and the transverse indentation forming devices.

[0012] According to the first aspect of the present application, a frame, wherein the longitudinal indentation forming device, the at least one longitudinal slitting device, the clamping roller, the transverse indentation forming device and the transverse cutting device are rotatably arranged on the frame, and the alignment device is arranged on the frame.

[0013] According to a first aspect of the present application, the rotation axes of the longitudinal indentation forming device, the transverse indentation forming device, the transverse cutting device and the clamping roller are arranged parallel to the transverse direction.

[0014] According to the first aspect of the present application, each of the longitudinal indentation forming devices is rotatably adjustable relative to other longitudinal indentation forming devices around the rotation axis of the longitudinal indentation forming device to accommodate the sheets with different misprints.

[0015] According to the first aspect of the present application, it is characterized in that it also includes a spare longitudinal indentation forming device, which is configured to form a longitudinal indentation on the sheet material conveyed to the spare longitudinal indentation forming device along the longitudinal direction, wherein when the specification of the sheet material changes, the spare longitudinal indentation forming device is configured to be used alternately with the longitudinal indentation forming device in the process of forming the longitudinal indentation on the sheet material.

[0016] According to the first aspect of the present application, it is characterized in that it also includes at least one spare longitudinal slitting device, which is configured to longitudinally slit the sheet with longitudinal indentations to form at least two separate single sub-sheets, wherein when the specifications of the sheet change, the at least one spare longitudinal slitting device is configured to be used alternately with the at least one longitudinal slitting device in the process of longitudinal slitting the sheet.

[0017] According to a second aspect of the present application, a method for performing indentation forming and slitting operations on a sheet material using misprint printing is provided, which is characterized in that it comprises: S01, forming a longitudinal indentation on the sheet material being conveyed in the longitudinal direction; S02, longitudinally slitting the sheet material having the longitudinal indentation formed thereon to form at least two separate single sub-sheets; S03, aligning the patterns on the at least two single sub-sheets with each other in the transverse direction; S04, forming a transverse indentation on the at least two single sub-sheets after alignment; and S05, transversely cutting the at least two single sub-sheets having the transverse indentation formed thereon, and cutting a plurality of products having transverse and longitudinal indentations from the at least two single sub-sheets.

[0018] According to the second aspect of the present application, it is characterized in that it also includes, when it is necessary to produce products of different specifications, setting a spare longitudinal indentation forming device and a spare longitudinal slitting device before the production of the product of the previous specification is completed, and after the production of the product of the previous specification is completed, switching the longitudinal indentation forming device and the longitudinal slitting device to the spare longitudinal indentation forming device and the spare longitudinal slitting device respectively, and repeating the above steps S01-S05 to produce the products of the different specifications.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A This is a schematic diagram of a sheet after misprinting.

[0021] Figure 1B for Figure 1A A is a partial enlarged view of the middle sheet.

[0022] Figure 2A It is a simplified three-dimensional schematic diagram of a die-cutting device according to an embodiment of the present application.

[0023] Figure 2B for Figure 2A A side view of the die-cutting device shown.

[0024] Figure 3AIt is a transverse schematic diagram of a longitudinal indentation forming device according to an embodiment of the present application, which is used to perform a longitudinal indentation operation on a product of a first specification.

[0025] Figure 3B It is a transverse schematic diagram of a longitudinal indentation forming device according to an embodiment of the present application, which is used to perform longitudinal indentation operations on products of a second specification.

[0026] Figure 4A is an overall schematic diagram of the alignment device 212 .

[0027] Figure 4B for Figure 4A A perspective view of one of the adjustment devices 234 in the alignment device 212 is shown.

[0028] Figure 4C for Figure 4A A schematic diagram of a simplified structure of another embodiment of an alignment device 212 is shown.

[0029] Figure 5 A schematic diagram of the simplified structure of an embodiment of a lateral indentation forming device.

[0030] Figure 6 A schematic diagram of the simplified structure of an embodiment of a transverse cutting device.

[0031] Figure 7 This is a flow chart of the indentation forming operation and the slitting operation for the sheet material with misprint printing in this application.

[0032] Figure 8 For passing Figure 7 Schematic diagram of the sheet pattern formed after step 704 in FIG.

[0033] Fig. 9 For passing Figure 7 Schematic diagram of the sheet pattern formed after step 710 in FIG. DETAILED DESCRIPTION

[0034] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of the present application, but the present application is not limited thereby. It should be understood that although terms indicating directions, such as "upper", "lower", "left", "right", "front" and "rear", etc. are used in the present application to describe the orientation of various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments of the present application can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0035] In order to facilitate the understanding of the viewing angle of the view, this application Figure 1A-Figure 6A three-dimensional coordinate axis is introduced to represent the direction, wherein the same direction of the same arrow represents the same direction. The X-axis represents the direction perpendicular to the printing paper feeding direction (lateral direction), the Y-axis represents the paper feeding direction (longitudinal direction), and the Z-axis represents the height direction of the die-cutting device. Since the embodiments of the present application can be arranged in different directions, the X-axis, Y-axis, and Z-axis representing the directions are only for illustration and should not be regarded as limiting.

[0036] The term "include" and its derivatives are intended to include but not limit. Unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection, an electrical connection or a communication connection, or it can be the internal connection of two elements, it can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. Where possible, the same or similar reference numerals used in this application refer to the same components.

[0037] Figure 1A is a schematic diagram of a sheet 100 after gradient typesetting (misprinting), wherein in order to more clearly show the indentation, Figure 1A In FIG. 1 , a repeating product pattern (such as the pattern shown by circle 180) printed on the sheet 100 is shown by circles. Figure 1A The dotted lines in the figure represent the transverse and longitudinal indentations to be formed, and the solid lines represent the die cutting lines.

[0038] The sheet 100 that has been staggered printed has multiple repeated product patterns in both the transverse and longitudinal directions, wherein the repeated product patterns in the transverse direction (the direction perpendicular to the printing paper feed direction) are offset from each other by a certain distance D, such as 24 mm, in the longitudinal direction. If the number of sub-sheets contained in the sheet 100 is defined according to the number of repetitions of a single printed product pattern in the transverse direction of the printed sheet, then the value of the number of sub-sheets is the value obtained by dividing the transverse dimension W of the printed sheet by the transverse length L of the single sub-sheet, rounded down to the integer. For products of different specifications, the height of the product, that is, the transverse length L of a single sub-sheet, is also different. For example, when the transverse dimension W of the printed sheet is 600 mm and the transverse length L of the single sheet is 187 mm, the number of sub-sheets of the printed sheet is 3. Figure 1A As shown, the sheet 100 has three sub-sheets, namely, a first sub-sheet 101, a second sub-sheet 102 and a third sub-sheet 103. The three sub-sheets are connected side by side along the transverse direction of the sheet (i.e., the X direction in the figure), and each sub-sheet has several repeated patterns along the longitudinal direction, but only one repeated pattern in the transverse direction.

[0039] Figure 1B for Figure 1AA is a partial enlarged view of the sheet 100. Figure 1B As shown, the dotted lines extending in the X direction represent transverse creasing lines, such as transverse creasing line 110, and the remaining dotted lines (the dotted lines extending in the Y direction and the dotted lines extending obliquely) represent longitudinal creasing lines to be produced (hereinafter referred to as "longitudinal creasing lines"), such as longitudinal creasing line 142, and the solid lines represent die cutting lines, such as die cutting lines 122, 124, 132, 134. The sheet portion surrounded by two adjacent longitudinal die cutting lines 122, 124 and two adjacent transverse die cutting lines 132, 134 is a single product to be produced (hereinafter referred to as "single product"). Figure 1B It can be seen that the length P of a single product in the paper feeding direction is the circumference of a single product (after folding along the longitudinal indentation), and the length of a single product in the transverse direction is the height H of a single product, that is, Figure 1A The transverse length L of a single sub-sheet.

[0040] In general, in order to obtain a single packaged product from a sheet 100 that has been printed with gradient typesetting (misprinting), the die-cutting device in the prior art performs the following operations on the sheet 100: first, longitudinal and transverse indentation forming operations are performed on the sheet 100, and then a cutting operation is performed. In order to adapt to the distribution of misprinted printing patterns on the printed sheet, for products of different specifications, in the existing die-cutting device, a set of independent indentation die-cutting rollers is usually required to produce each of the products of different specifications, and each set of indentation die-cutting rollers includes a longitudinal indentation forming device, a transverse indentation forming device and a die-cutting roller, wherein the longitudinal indentation forming device and the transverse indentation forming device are used to form indentations that can be used for product folding along the longitudinal indentation and transverse indentation on the sheet, and the die-cutting roller is used to cut the sheet into individual products along the die-cutting line on the sheet, and each individual product can be folded from a flat state into a three-dimensional packaging box.

[0041] Therefore, when the die-cutting device in the prior art is used, for products of different specifications, a corresponding number of embossing die-cutting rollers are required. For example, for products of different specifications with a horizontal length L of 200 mm or 250 mm, two sets of embossing die-cutting rollers are required, namely, two longitudinal embossing forming devices, two horizontal embossing forming devices and two die-cutting rollers. When changing the production specifications of the product, the corresponding mold and die-cutting tool need to be replaced, but the replacement of the mold or tool will take up the time of the production process. If the product has more specifications, multiple sets of embossing die-cutting rollers are required, which undoubtedly increases the production cost. At the same time, more embossing die-cutting rollers need to be maintained, and more space is required to store multiple sets of embossing die-cutting rollers.

[0042] In addition, when the die-cutting device in the prior art is used for creasing operations, since the printed pattern on the sheet has a gradient layout and the multiple sub-sheets have not been cut apart from each other, it is difficult to form a complete horizontal creasing on the current sheet without affecting the adjacent sheet.

[0043] Specifically, if Figure 1B As shown, taking the transverse creasing line 110 on the third web 103 as an example, if the transverse creasing line 110 on the third web 103 extends too far to the left, it may interfere with the adjacent second web 102, that is, the left end 112 of the transverse creasing line 110 will inevitably cross the longitudinal boundary line (i.e., the longitudinal die-cutting line 122) between the adjacent third web 103 and the second web 102, thereby forming a transverse creasing on the second web 102. However, if it is to be avoided that an unnecessary transverse creasing is generated on the second web 102, the transverse creasing line 110 cannot be pressed to the position of the longitudinal boundary line (i.e., the longitudinal die-cutting line 122), that is, the left end 112 of the transverse creasing line 110 cannot reach the longitudinal boundary line (i.e., the longitudinal die-cutting line 122), thereby causing the problem of insufficient transverse creasing.

[0044] Figure 2A-2B A simplified three-dimensional schematic diagram and a side view of a die-cutting device 200 according to an embodiment of the present application are shown, respectively, so as to show the positional relationship of each component on the die-cutting device 200 and the matching relationship between each component and the web. It should be noted that each component in the die-cutting device 200 is only shown in a simplified manner, and the specific structure of each component is not shown.

[0045] like Figure 2A-2BAs shown, the die-cutting device 200 has a frame (not shown in the figure), and according to the paper feeding direction, the frame is sequentially provided with a first group of tension roller devices 201, 202, spare longitudinal indentation forming devices 203, 204, longitudinal indentation forming devices 205, 206, spare longitudinal slitting devices 207, 208, longitudinal slitting devices 209, 210, an alignment device 212, clamping rollers 221, 222, transverse indentation forming devices 223, 224, a second group of tension rollers 225, 226 and transverse cutting devices 227, 228. The first group of tension rollers 201, 202, spare longitudinal indentation forming devices 203, 204, longitudinal indentation forming devices 205, 206, spare longitudinal slitting devices 207, 208, longitudinal slitting devices 209, 210, clamping rollers 221, 222, transverse indentation forming devices 223, 224, the second group of tension rollers 225, 226 and transverse cutting devices 227, 228 are all rolling devices, which have pairs of upper rollers and lower rollers respectively arranged on the upper and lower sides of the sheet 100. The sheet 100 can move along the paper feeding direction under the action of the friction force of the paired upper rollers and lower rollers of the first group of tension rollers 201, 202 and the second group of tension rollers 225, 226. The above pairs of upper and lower rollers are arranged on the frame through their respective rotating axes perpendicular to the paper feeding direction, so that they can rotate relative to the frame. The die-cutting device 200 can Figure 1A The sheet 100 printed with gradient typesetting shown in FIG. 1 is subjected to an indentation forming operation and a slitting operation.

[0046] like Figure 2B As shown, in the embodiment of the present application, the paper feeding direction is horizontally to the left along the Y direction as a whole, so the upper rollers of the first group of tension rollers 201, 202, the spare longitudinal indentation forming devices 203, 204, the longitudinal indentation forming devices 205, 206, the spare longitudinal slitting devices 207, 208, the longitudinal slitting devices 209, 210, the clamping rollers 221, 222, the transverse indentation forming devices 223, 224, the second group of tension rollers 225, 226 and the transverse cutting devices 227, 228 rotate in the counterclockwise direction, and the lower rollers rotate in the clockwise direction, so that the sheet 100 is roughly indented and slit in the horizontal left direction. It should be understood by those skilled in the art that in some other embodiments, according to different paper feeding directions, the rotation directions of the upper rollers and the lower rollers can also be set accordingly. For example, when the paper feeding direction is to the right, the upper roller can also rotate in the clockwise direction, and the lower roller can also rotate in the counterclockwise direction.

[0047] Continue to refer to Figure 2A-2B, the paired upper rollers and lower rollers of the longitudinal indentation forming devices 205, 206 and the spare longitudinal indentation forming devices 203, 204 are matched in a convex-concave manner, that is, if the indentation surface of the upper roller has a convex indentation pattern, the corresponding indentation surface of the lower roller has a concave indentation pattern; or the indentation surface of the upper roller has a concave indentation pattern, the corresponding indentation surface of the lower roller has a convex indentation pattern. The longitudinal indentation forming devices 205, 206 and the spare longitudinal indentation forming devices 203, 204 can form longitudinal indentations on the sheet 100 along the paper feeding direction. The upper rollers and lower rollers in each of the longitudinal indentation forming devices 205, 206 and the spare longitudinal indentation forming devices 203, 204 are provided with a plurality of indentation rollers along the axial direction of the rotating shaft (see for details). Figure 3A-3B ), and the distance between the plurality of creasing rollers along the axial direction can be adjusted to meet the needs of creasing operations on products of different specifications. When performing the creasing operation, only one of the longitudinal creasing forming devices 205, 206 and the spare longitudinal creasing forming devices 203, 204 performs the longitudinal creasing operation on the sheet 100, and the other is in a standby or waiting for adjustment state. The detailed structure of the longitudinal creasing forming devices 205, 206 and the spare longitudinal creasing forming devices 203, 204 will be described in detail below. Figure 3A-3B Expand the description of .

[0048] Continue to refer to Figure 2A-2B , the longitudinal slitting devices 209, 210 or spare longitudinal slitting devices 207, 208 are arranged at the downstream position of the longitudinal indentation forming devices 205, 206 and the spare longitudinal indentation forming devices 203, 204 along the paper feeding direction, and their respective pairs of upper and lower rollers are provided with multiple slitting tools along the axial direction (transverse direction) of the rotating shaft, and the axial distance of the multiple slitting tools can be adjusted to meet the needs of longitudinal slitting operations on products of different specifications. Among them, the upper roller in the longitudinal slitting devices 209, 210 or spare longitudinal slitting devices 207, 208 is an upper circular knife, and the roller surface of the lower roller is provided with a groove corresponding to the position of the upper circular knife blade, so as to cooperate with the upper circular knife to cut the sheet 100. Specifically, according to the number of widths of the sheet 100, the multiple slitting tools can be adjusted laterally to align with the longitudinal die-cutting line of the product (for example Figure 1B The longitudinal die cutting lines 122, 124 shown in FIG. 1 are used to perform longitudinal slitting operations on the sheet 100 along the longitudinal die cutting lines, so that the sheet 100 is longitudinally cut into a plurality of separate single sub-sheets (eg Figure 2A When the longitudinal slitting operation is performed, only one of the longitudinal slitting devices 209, 210 and the standby longitudinal slitting devices 207, 208 performs the longitudinal slitting operation on the sheet 100, and the other is in a standby or waiting for adjustment state.

[0049] Those skilled in the art should understand that in some other embodiments, if the number of sheets 100 is two, only one slitting tool may be provided on the paired upper and lower rollers of the longitudinal slitting devices 209, 210 or the spare longitudinal slitting devices 207, 208.

[0050] In the embodiment of the present application, when the longitudinal indentation forming operation and the slitting operation are performed on the sheet 100, only one of the longitudinal indentation forming devices 205, 206 and the spare longitudinal indentation forming devices 203, 204 is in working state. Correspondingly, only one of the longitudinal slitting devices 209, 210 and the spare longitudinal slitting devices 207, 208 is also in working state. For example, when the sheet with three widths is indented and slid, the longitudinal indentation forming devices 205, 206 and the longitudinal slitting devices 209, 210 adjusted to correspond to the three widths of the sheet are used. If the sheet 100 that needs to be indented and slid is subsequently changed from the specification of three widths to the specification of five widths, then during the current die-cutting operation of the sheet with three widths, the spare longitudinal indentation forming devices 203, 204 and the spare longitudinal slitting devices 207, 208 are adjusted so that their corresponding indentation rollers and cutters are set to correspond to the sheet with five widths. After the die-cutting operation of the current sheet with three widths is completed, the longitudinal indentation forming device 205, 206 and the longitudinal slitting device 209, 210 are switched to the spare longitudinal indentation forming device 203, 204 and the spare longitudinal slitting device 207, 208 through a switching device (not shown in the figure), and the die-cutting operation of the sheet with five widths can be performed with only a small adjustment, thereby saving the time of setting the longitudinal indentation forming device and the longitudinal slitting device when replacing sheets with different numbers of widths, making the die-cutting operation more efficient and convenient. In an embodiment of the present application, the switching device can be to disassemble the existing mold and then install the mold to be replaced.

[0051] Continue to refer to Figure 2A-2B The alignment device 212 is arranged at the downstream position of the longitudinal slitting devices 209, 210 and the spare longitudinal slitting devices 207, 208 along the paper feeding direction. It is used to align the patterns, transverse indentation lines and transverse die-cutting lines on the multiple sub-sheets separated from each other by longitudinal slitting in the transverse direction.

[0052] exist Figure 2A-2BIn the illustrated embodiment, the alignment device 212 has five adjustment devices 231, 232, 233, 234, 235. Two adjacent adjustment devices are staggered in the paper feeding direction of the sheet 100 to define different travel paths from the longitudinal slitting device 209, 210 or the backup longitudinal slitting device 207, 208 to the transverse indentation forming device 223, 224, respectively, so that two adjacent single-width sub-sheets of the five separated single-width sub-sheets 261, 262, 263, 264, 265 have different travel distances in the paper feeding direction, thereby generating a travel displacement difference. Figure 2B In the figure, the adjusting device 231 is blocked by the adjusting device 234 , and the adjusting device 232 is blocked by the adjusting device 235 .

[0053] According to the distance of the pattern on the misprinted sheet 100 being offset in the transverse direction, the five adjusting devices 231, 232, 233, 234, 235 are set accordingly to have the distance of the pattern on the paper feeding direction being offset, so that the mutually misprinted patterns on two adjacent single-width sub-sheets of the five separated single-width sub-sheets 261, 262, 263, 264, 265 can be aligned with each other after the displacement adjustment of the adjusting devices 231, 232, 233, 234, 235, that is, the patterns, transverse indentation lines and transverse die-cutting lines on two adjacent single-width sub-sheets are aligned with each other in the transverse direction, so as to facilitate the subsequent transverse indentation and transverse cutting operations. The detailed structure of the alignment device 212 will be described below in conjunction with Figure 4A-4B Expand the description of .

[0054] Continue to refer to Figure 2A-2B , the transverse indentation forming devices 223, 224 are arranged at the downstream position of the alignment device 212 along the paper feeding direction. Similar to the longitudinal indentation forming devices, the upper roller and the lower roller of each pair of transverse indentation forming devices 223, 224 are also matched in a convex-concave manner, that is, if the indentation surface of the upper roller has a convex indentation pattern, the corresponding indentation surface of the lower roller has a concave indentation pattern; or the indentation surface of the upper roller has a concave indentation pattern, the corresponding indentation surface of the lower roller has a convex indentation pattern. The transverse indentation forming devices 223, 224 can be used to form transverse indentations on the separated single sub-sheets 261, 262, 263, 264, 265 after being aligned by the five web offset devices 231, 232, 233, 234, 235 of the alignment device 212. The detailed structure of the transverse indentation forming devices 223, 224 will be described below in conjunction with Figure 5 Expand the description of .

[0055] In order to adjust the depth of the longitudinal indentation and the transverse indentation formed on the sheet 100, the distance between the upper roller and the lower roller of the longitudinal indentation forming device 205, 206, the spare longitudinal indentation forming device 203, 204 and the transverse indentation forming device 223, 224 can be adjusted. Figure 1B The triangular folds near the longitudinal indentation lines 142, 143) are at the top of the package (e.g. Figure 1B The third sub-sheet 103 is shown on the left side) or the bottom (eg Figure 1B The position of the third sub-sheet 103 shown in FIG. 1 is relative to the transverse indentation (eg Figure 1B The middle transverse indentation line 110) needs to be pressed deeper, so the distance between the upper roller and the lower roller of the longitudinal indentation forming device 205, 206 or the spare longitudinal indentation forming device 203, 204 needs to be adjusted to be smaller than the distance between the upper roller and the lower roller of the transverse indentation forming device 223, 224.

[0056] Continue to refer to Figure 2A-2B The transverse cutting devices 227, 228 are arranged at the downstream position of the transverse impression forming devices 223, 224 along the paper feeding direction, and are used to transversely cut the single sub-sheets 261, 262, 263, 264, 265 formed with transverse impressions, separated from each other, and aligned with each other in the transverse direction, so as to form a plurality of separated products 282 with transverse impressions and longitudinal impressions. The detailed structure of the transverse cutting devices 227, 228 will be described below in conjunction with Figure 6 Expand the description of .

[0057] Continue to refer to Figure 2A-2BThe first group of tension rollers 201, 202 are arranged at the upstream position of the longitudinal indentation forming device 205, 206 and the spare longitudinal indentation forming device 203, 204 along the paper feeding direction, and the second group of tension rollers 225, 226 are arranged at the middle position of the transverse indentation forming device 223, 224 and the transverse cutting device 227, 228 along the paper feeding direction (can also be arranged at the downstream position of the transverse cutting device 227, 228 along the paper feeding direction), which are used to provide tension for the sheet 100 or the separated single sub-sheets 261, 262, 263, 264, 265 to travel in the paper feeding direction. Specifically, the upper and lower rollers of the first group of tension rollers 201, 202 and the second group of tension rollers 225, 226 jointly apply a certain pressure to the sheet 100 or the separated single sub-sheets 261, 262, 263, 264, 265, and the rotation speed of the second group of tension rollers 225, 226 is slightly higher than the rotation speed of the first group of tension rollers 201, 202. Since the second group of tension rollers 225, 226 are arranged at the downstream position of the first group of tension rollers 201, 202 in the paper feeding direction, the second group of tension rollers 225, 226 pull the sheet 100 or the separated single sub-sheets 261, 262, 263, 264, 265 along the paper feeding direction relative to the first group of tension rollers 201, 202, so as to ensure that the sheet 100 or the separated single sub-sheets 261, 262, 263, 264, 265 are always kept at a certain tension and tightened during the process of traveling without generating wrinkles.

[0058] Continue to refer to Figure 2A-2B The clamping rollers 221, 222 are arranged in the middle of the alignment device 212 and the transverse indentation forming devices 223, 224 along the paper feeding direction, and are used to maintain a stable tension for the separated single sub-sheets 261, 262, 263, 264, 265 output from the alignment device 212, and to make the single sub-sheets 261, 262, 263, 264, 265 separated by the adjusting devices 231, 232, 233, 234, 235 of the alignment device 212 return to the same traveling plane, and enter the transverse indentation forming devices 223, 224 in the same orientation (to the left), so as to facilitate the subsequent transverse indentation forming operation.

[0059] Figure 3A and Figure 3B The diagrams for two different specifications of products are shown respectively. Figure 2A A simplified schematic diagram of the upper roller of the longitudinal indentation forming device. It should be noted that Figure 3A and 3B Only an upper roller of an exemplary longitudinal impression forming device is shown, and only a simplified structure of the upper roller of the impression forming device is shown.

[0060] Since the spare longitudinal indentation forming device 203, 204 has a substantially identical structure to the longitudinal indentation forming device 205, 206, and the indentation patterns on the indentation surfaces of the upper and lower rollers of the spare longitudinal indentation forming device rollers 203, 204 and the longitudinal indentation forming device 205, 206 are distributed at the same positions, the only difference being the convexity or concavity of the indentation pattern. Figure 3A and Figure 3B The upper roller 205 of the longitudinal indentation forming device is used as a representative to introduce the structure and adjustment method of the spare longitudinal indentation forming devices 203, 204 and the longitudinal indentation forming devices 205, 206.

[0061] like Figure 3A-3B As shown, the upper roller 205 of the longitudinal indentation forming device has a rotating shaft 301 perpendicular to the paper feeding direction, and the upper roller 205 of the longitudinal indentation forming device has a plurality of indentation rollers along the axial direction of the rotating shaft 301, namely, the first indentation roller 302, the second indentation roller 304, the third indentation roller 306, the fourth indentation roller 308, the fifth indentation roller 310 and the sixth indentation roller 312. The first indentation roller 302, the second indentation roller 304, the third indentation roller 306, the fourth indentation roller 308, the fifth indentation roller 310 and the sixth indentation roller 312 can rotate around the rotating shaft 301 at the same time, and the axial spacing between the first indentation roller 302, the second indentation roller 304, the third indentation roller 306, the fourth indentation roller 308, the fifth indentation roller 310 and the sixth indentation roller 312 can be adjusted.

[0062] Continue to refer to Figure 3A-3BAn indentation pattern 322 for forming a longitudinal indentation on the left side of the first sub-sheet is evenly arranged in the circumferential direction of the first indentation roller 302 on the side close to the second indentation roller 304, an indentation pattern 324 for forming a longitudinal indentation on the right side of the first sub-sheet is evenly arranged in the circumferential direction of the second indentation roller 304 on the side close to the first indentation roller 302, an indentation pattern 326 for forming a longitudinal indentation on the left side of the second sub-sheet is evenly arranged in the circumferential direction of the second indentation roller 304 on the side close to the third indentation roller 306, an indentation pattern 328 for forming a longitudinal indentation on the right side of the second sub-sheet is evenly arranged in the circumferential direction of the third indentation roller 306 on the side close to the second indentation roller 304, and an indentation pattern 332 for forming a longitudinal indentation on the left side of the third sub-sheet is evenly arranged in the circumferential direction of the third indentation roller 306 on the side close to the fourth indentation roller 308 An indentation pattern 334 for forming a longitudinal indentation on the right side of the third sub-sheet is evenly arranged in the circumferential direction of the fourth indentation roller 308 close to the third indentation roller 306, an indentation pattern 336 for forming a longitudinal indentation on the left side of the fourth sub-sheet is evenly arranged in the circumferential direction of the fourth indentation roller 308 close to the fifth indentation roller 310, an indentation pattern 338 for forming a longitudinal indentation on the right side of the fourth sub-sheet is evenly arranged in the circumferential direction of the fifth indentation roller 310 close to the fourth indentation roller 308, an indentation pattern 342 for forming a longitudinal indentation on the left side of the fifth sub-sheet is evenly arranged in the circumferential direction of the fifth indentation roller 310 close to the sixth indentation roller 312, and an indentation pattern 344 for forming a longitudinal indentation on the right side of the fifth sub-sheet is evenly arranged in the circumferential direction of the sixth indentation roller 312 close to the fifth indentation roller 310. The indentation patterns of two adjacent sub-sheets (e.g., the indentation pattern 324 on the right side of the first sub-sheet and the indentation pattern 326 on the left side of the second sub-sheet) are staggered by a certain distance D in the circumferential direction, and the staggered distance D corresponds to the staggered distance D of the repeated pattern on the misprinted sheet 100 in the transverse direction, so that longitudinal indentations corresponding to each sub-sheet can be pressed on the misprinted sheet 100. In addition, the above-mentioned indentation pattern is formed by the protrusions or depressions on the roller.

[0063] A person skilled in the art should understand that in some other embodiments, the indentation patterns of two adjacent sub-sheets (e.g., the indentation pattern 324 corresponding to the right side of the first sub-sheet and the indentation pattern 326 corresponding to the left side of the second sub-sheet) may not be set on the same indentation roller (e.g., the second indentation roller 304). Alternatively, the indentation patterns of two adjacent sub-sheets may also be set on two adjacent indentation rollers, respectively. Therefore, the distance D of the indentation patterns of two adjacent sub-sheets staggered in the circumferential direction may also be adjusted by rotating the two adjacent indentation rollers, thereby changing the staggered angle of the two adjacent indentation rollers in the circumferential direction.

[0064] Those skilled in the art should understand that in some other embodiments, the number of creasing rollers is not limited to 6, and can be adaptively designed and adjusted according to the height H of products of different specifications (ie, the lateral length L of a single sheet).

[0065] like Figure 3A As shown, when a longitudinal creasing operation is performed on a product with a height of H1, for example, when the transverse dimension of the sheet is 600 mm and the height of a single product is H1 (i.e., the transverse length L of a single sheet) is 120 mm, the number of sheets that can be set on the sheet is 5. The axial distance between two adjacent creasing rollers is adjusted accordingly, so that the transverse distance covered by the left and right creasing patterns of the same sub-sheet corresponds to the height H1 of the product. For example, with the first creasing roller 302 as a reference, the distance between the second creasing roller 304 and the first creasing roller 302 is adjusted until the distance between the left end of the left creasing pattern 322 of the first sub-sheet on the first creasing roller 302 and the right end of the right creasing pattern 324 of the first sub-sheet on the second creasing roller 304 is equal to the height H1 of the product.

[0066] like Figure 3B As shown, when the longitudinal creasing operation is performed on a product with a height of H2, for example, when the transverse dimension of the sheet is 600 mm and the height of a single product is H2 (i.e., the transverse length L of a single sheet) is 187 mm, the number of sheets that can be set on the sheet is 3. The axial distance between the two adjacent creasing rollers is adjusted accordingly so that the transverse distance covered by the left and right creasing patterns of the same sub-sheet corresponds to the height H2 of the product. For example, with the first creasing roller 302 as a reference, the distance between the second creasing roller 304 and the first creasing roller 302 is adjusted until the distance between the left end of the left creasing pattern 322 of the first sub-sheet on the first creasing roller 302 and the right end of the right creasing pattern 324 of the first sub-sheet on the second creasing roller 304 is equal to the height H2 of the product. Since there are only three single sheets on the sheet, the fifth creasing roller 310 and the sixth creasing roller 312 are in a non-working state, and only the axial spacing between the first creasing roller 302, the second creasing roller 304, the third creasing roller 306 and the fourth creasing roller 308 needs to be adjusted.

[0067] Figures 4A-4C Shows Figure 2A-2B A simplified perspective view of an embodiment of the alignment device 212, wherein Figure 4A is an overall schematic diagram of the alignment device 212, Figure 4B for Figure 4A A perspective view of one of the adjustment devices 234 in the alignment device 212 is shown, Figure 4C for Figure 4A A schematic diagram of an alternative alignment device 212 is shown.

[0068] like Figure 4A-4B As shown, the alignment device 212 has five adjustment devices 231, 232, 233, 234, 235, wherein each of the five adjustment devices 231, 232, 233, 234, 235 has a deflection roller 411, 412, 413, 414, 415. Since the five adjustment devices 231, 232, 233, 234, 235 have the same structure and working principle, Figure 4B The structures and working principles of the adjustment devices 234 are introduced as a representative.

[0069] like Figure 4B As shown, the adjusting device 234 has a spiral transmission mechanism, including a nut 402 and a lead screw 404. The lead screw 404 is connected to the nut 402 by threaded cooperation, and the nut 402 is fixedly mounted on the frame, so that the rotational motion of the lead screw 404 in the nut 402 can be converted into a linear motion of the lead screw 404 relative to the frame in the height direction, that is, the lead screw 404 will move a fixed distance upward or downward every time it rotates one circle in the nut 402. The adjusting device 234 also has an offset roller 414 and an offset roller support seat 406. The offset roller 414 is rotatably fixed on the offset roller support seat 406 through a rotating shaft 408, and the direction of the rotating shaft 408 of the offset roller is perpendicular to the paper feeding direction, and is parallel to the rotating shaft of the longitudinal slitting device 209, 210 upstream thereof and the rotating shaft of the clamping roller 221, 222 downstream thereof, and the direction of the rotating shaft 408 of the offset roller is perpendicular to the extension direction of the lead screw 404. The upper end of the lead screw 404 is rotatably connected to the bottom of the offset roller support seat 406, so the linear movement of the lead screw 404 in the height direction can drive the offset roller support seat 406 and the offset roller 414 to move upward or downward at the same time. In some other embodiments, according to the same working principle of the screw transmission mechanism, it can also be configured to change the height of the offset roller 414 by rotating the nut 402 on the lead screw 404, which will not be described in detail here.

[0070] like Figure 4BAs shown, the single sub-sheet 264 formed after the sheet 100 is cut by the longitudinal slitting devices 209 and 210 passes under the offset roller 414 of the adjustment device 234, and enters the clamping rollers 221 and 222 after being turned by the offset roller 414. Since the single sub-sheet 264 always maintains tension under the pulling of the first group of tension rollers 201 and 202, a certain pressure is always maintained between it and the offset roller 414. The linear movement of the offset roller 414 in the height direction can cause the single sub-sheet 264 to deflect accordingly under the pressure, so that the moving path of the single sub-sheet 264 between the longitudinal slitting devices 209 and 210 and the clamping rollers 221 and 222 changes. In the embodiment of the present application, the greater the distance the offset roller 414 moves downward, the longer the moving path of the single sub-sheet 264 between the longitudinal slitting devices 209, 210 and the clamping rollers 221, 222; conversely, the smaller the distance the offset roller 414 moves downward, the shorter the moving path of the single sub-sheet 264 between the longitudinal slitting devices 209, 210 and the clamping rollers 221, 222. According to the offset distance between the single-width sub-sheet 264 and the printed pattern on the adjacent single-width sub-sheet in the transverse direction, the downward movement distance of the offset roller 414 is controlled and adjusted accordingly, so that the increased movement distance of the single-width sub-sheet 264 between the longitudinal slitting devices 209, 210 and the clamping rollers 221, 222 can compensate for the offset distance between it and the printed product pattern on the adjacent single-width sub-sheet, so that the printed product patterns originally offset from each other on the five separated single-width sub-sheets 261, 262, 263, 264, 265 are adjusted by the adjusting devices 231, 232, 233, 234, 235, and finally enter the clamping rollers 221, 222 in a manner in which the patterns are aligned with each other.

[0071] Based on Figure 4B The middle adjustment device 234 adjusts the displacement of the single sub-sheet 264 in the same manner, and the adjustment device may also have other implementations.

[0072] Figure 4C for Figure 4A The schematic diagram of the simplified structure of another embodiment of the alignment device 212 is shown, again using a single adjustment device 434 as a representative example.

[0073] like Figure 4CAs shown, the adjusting device 434 includes a fixed roller 422 and an adjusting roller 424, wherein the adjusting roller 424 is arranged at a downstream position of the fixed roller 422 along the paper feeding direction and is located above the fixed roller 422. The rotating axes of the fixed roller 422 and the adjusting roller 424 are perpendicular to the paper feeding direction, and the fixed roller 422 is rotatably fixed on the frame through its rotating axis, and the adjusting roller 424 is rotatably and movably connected to the frame through its rotating axis. The rotating axis of the adjusting roller 424 can be movably connected to the frame by a connection method commonly used in the mechanical field (such as a ball screw, hydraulic pressure, air pressure, or a linear motor, etc.). The single sub-sheet 264 formed after the sheet 100 is cut by the longitudinal slitting device 209, 210 bypasses from the bottom of the fixed roller 422 of the adjusting device 434, turns through the fixed roller 422, and then goes to the top of the adjusting roller 424, and enters the clamping rollers 221, 222 after the secondary turning of the adjusting roller 424.

[0074] Since the single-width sub-sheet 264 is always under tension under the pulling of the first set of tension rollers 201, 202, pressure is always maintained between it and the adjusting roller 424. The movement of the adjusting roller 424 in the direction indicated by the arrow in the figure can cause the single-width sub-sheet 264 to deviate in the corresponding direction, so that the movement path of the single-width sub-sheet 264 between the longitudinal slitting devices 209, 210 and the clamping rollers 221, 222 is changed.

[0075] It should be understood by those skilled in the art that the ways of changing the moving path of a single sub-sheet between the longitudinal slitting devices 209, 210 and the nip rollers 221, 222 include but are not limited to: Figures 4A-4C The embodiments shown in the figure belong to the technical solutions as long as the technical solutions can make the single sub-sheet after cutting have an adjustable moving path (displacement) in the paper feeding direction. Figures 4A-4C The equivalent technical solutions of the illustrated implementation methods should all be included in the protection scope of this application.

[0076] Figure 5 FIG. 2 is a schematic diagram of a simplified structure of an embodiment of a transverse indentation forming device. Since the indentation patterns on the indentation surfaces of the upper roller and the lower roller of the transverse indentation forming device 223 and 224 are distributed in the same position, the only difference is the convexity or concavity of the indentation pattern, Figure 5 The structures of the lateral indentation forming devices 223 and 224 are introduced by taking the upper roller 223 of the lateral indentation forming device as a representative.

[0077] like Figure 5 As described above, the upper roller 223 of the transverse indentation forming device can rotate around a rotation axis 502 perpendicular to the paper feeding direction. The upper roller 223 of the transverse indentation forming device is provided with a plurality of grooves on its circumferential surface corresponding to the transverse indentation lines (e.g. Figure 1BThe plurality of transverse indentation patterns 511-518 of the transverse indentation line 110 shown in the figure extend in the transverse direction and can cover all the single sub-sheets in the transverse direction, so that transverse indentations can be formed along the transverse indentation lines on the five separate single sub-sheets 261, 262, 263, 264, 265 after misalignment. In an embodiment of the present application, three groups of transverse indentation patterns are continuously and evenly arranged in the direction in which the upper roller 223 of the transverse indentation forming device rotates one circle, and the position of each group of transverse indentation patterns on the circumferential surface of the upper roller 223 of the transverse indentation forming device corresponds to a transverse indentation line on a product. For example Figure 5 The distance P in (refer to the above Figure 1B The transverse indentation lines 513-516 between the distance P (representing the circumference of a single product) correspond to the transverse indentation lines of a product on a single sub-sheet. With this arrangement, the upper roller 223 of the transverse indentation forming device can extrude transverse indentation lines of three products on a single sub-sheet per rotation.

[0078] Those skilled in the art should understand that, according to actual production needs, different numbers of transverse indentation patterns may be continuously arranged in the direction in which the transverse indentation forming device rotates one circle, or only one group of transverse indentation patterns may be arranged in the direction in which the transverse indentation forming device rotates one circle.

[0079] Figure 6 Schematic diagram of a simplified structure of an embodiment of a transverse cutting device. Since the transverse cutters on the upper roller and the lower roller of the transverse cutting device 227, 228 are installed at the same position, the upper and lower cutters are aligned with each other to perform transverse cutting of the sub-sheet in the form of scissors. Figure 6 The structures of the transverse cutting devices 227 and 228 are introduced by taking the upper roller 227 of the transverse cutting device as a representative.

[0080] like Figure 6 As described above, the upper roller 227 of the transverse cutting device can rotate around a rotation axis 602 perpendicular to the paper feeding direction. The upper roller 227 of the transverse cutting device is provided with a plurality of rollers on its circumferential surface that are aligned with the transverse die cutting line (e.g. Figure 1B The cutting directions of the plurality of transverse cutting knives 611, 612 are perpendicular to the paper feeding direction and can cover all the single sub-sheets in the transverse direction, so that five separated single sub-sheets 261, 262, 263, 264, 265 can be transversely cut along the transverse die-cutting lines at the same time, thereby forming a plurality of products (for example, Figure 2A For example, Figure 6 The distance P in (refer to the above Figure 1B, the distance P represents the circumference of a single product) between the transverse cutting knives 611, 612 corresponds to the transverse die-cutting lines of the two sides of a product on a single sub-sheet. In the embodiment of the present application, three transverse cutting knives are continuously and evenly installed in the direction of one rotation of the upper roller 227 of the transverse cutting device, so that three products can be cut from each single sub-sheet 261, 262, 263, 264, 265 every time the upper roller 227 of the transverse cutting device rotates one circle.

[0081] Those skilled in the art should understand that, according to actual production needs, different numbers of transverse cutting tools may be continuously arranged in the direction in which the transverse cutting device rotates one circle, or only one transverse cutting tool may be arranged in the direction in which the transverse cutting device rotates one circle.

[0082] It should be understood by those skilled in the art that the die-cutting device 200 of the present application may further include a control device (not shown in the figure), which is connected to the first group of tension rollers 201, 202, the spare longitudinal indentation forming device 203, 204, the longitudinal indentation forming device 205, 206, the spare longitudinal slitting device 207, 208, the longitudinal slitting device 209, 210, the alignment device 212, the clamping rollers 221, 222, the transverse indentation forming device 223, 224, the second group of tension rollers 225,226 and the transverse cutting device 227,228 are communicated and connected, and the first group of tension rollers 201,202, the spare longitudinal indentation forming device 203,204, the longitudinal indentation forming device 205,206, the spare longitudinal slitting device 207,208, the longitudinal slitting device 209,210, the clamping rollers 221,222, the transverse indentation forming device 223,224, the second group of tension rollers can be individually controlled by inputting corresponding instructions in the control panel of the control device. 225, 226 and the transverse cutting device 227, 228; or control the spacing between the paired upper rollers and lower rollers of the longitudinal indentation forming device 205, 206, the spare longitudinal indentation forming device 203, 204 and the transverse indentation forming device 223, 224; or control the axial spacing between multiple indentation rollers in the longitudinal indentation forming device 205, 206 or the spare longitudinal indentation forming device 203, 204, and the longitudinal slitting device 209 , 210 or the axial spacing of multiple slitting tools in the spare longitudinal slitting device 207, 208; or control the rotation of the screw 404 or the nut 402 in the alignment device 212 and the movement of the adjustment roller 424; or control the replacement use of the longitudinal indentation forming device 205, 206 and the spare longitudinal indentation forming device 203, 204 and the switching use of the longitudinal slitting device 209, 210 and the spare longitudinal slitting device 207, 208, so as to realize the automatic control of the die-cutting device.

[0083] Figure 7This is a flow chart of the indentation forming operation and the slitting operation for the sheet material with misprint printing in this application. Figure 8 For passing Figure 7 A schematic diagram of a sheet pattern formed after step 704 in FIG. Fig. 9 For passing Figure 7 Schematic diagram of the sheet pattern formed after step 710 in FIG.

[0084] like Figure 7 As shown, in step 702, for a product of a specific specification, the rotation speeds of the respective pairs of upper and lower rollers in the first group of tension rollers 201, 202, the longitudinal indentation forming devices 205, 206, the longitudinal slitting devices 209, 210, the clamping rollers 221, 222, the transverse indentation forming devices 223, 224, the second group of tension rollers 225, 226 and the transverse cutting devices 227, 228 are pre-set, and the rotation speeds of the respective pairs of upper and lower rollers in the longitudinal indentation forming devices 205, 206 and the transverse indentation forming devices 223, 224 are pre-set. The distance between the roller and the lower roller, the axial distance between the multiple impression rollers in the longitudinal impression forming device 205, 206, the axial distance between the multiple slitting knives in the longitudinal slitting device 209, 210, the offset distance of the five offset rollers 411, 412, 413, 414, 415 in the alignment device 212, and the axial distance between the multiple impression rollers in the spare longitudinal impression forming device 203, 204 corresponding to the production of the next specification product and the axial distance between the multiple slitting knives in the spare longitudinal slitting device 207, 208 are set in advance. After the operation of step 702 is completed, the process goes to step 704.

[0085] In step 704, the sheet 100 after misprinting proceeds to the longitudinal indentation forming devices 205, 206, and longitudinal indentations (such as longitudinal indentation lines 810) are formed on the sheet 100 by the longitudinal indentation forming devices 205, 206. The sheet pattern formed in step 704 is as shown in FIG. Figure 8 As shown, it can be seen that at this time, the indentation patterns (eg, patterns 801, 802, 803) on adjacent sub-sheets are staggered in the transverse direction. After the operation of step 704 is completed, the process proceeds to step 706.

[0086] In step 706 , the sheet 100 with the longitudinal indentations moves to the longitudinal slitting devices 209 , 210 , and is longitudinally slitting by the longitudinal slitting devices 209 , 210 to form five separate single sub-sheets 261 , 262 , 263 , 264 , 265 . After step 706 is completed, the process goes to step 708 .

[0087] In step 708, the five separated single sub-sheets 261, 262, 263, 264, 265 formed by the slitting operation travel to the alignment device 212, and the five offset rollers 411, 412, 413, 414, 415 on the alignment device 212 are set to have a travel displacement difference in the paper feeding direction of the five separated single sub-sheets 261, 262, 263, 264, 265, so that the misprinted product patterns on the five separated single sub-sheets 261, 262, 263, 264, 265 are mutually aligned in the transverse direction. After the operation of step 708 is completed, the process goes to step 710.

[0088] In step 710, the aligned five separated single sub-sheets 261, 262, 263, 264, 265 are adjusted by the clamping rollers 221, 222 and enter the transverse indentation forming devices 223, 224 in the same orientation. The transverse indentation forming devices 223, 224 simultaneously form at least one set of transverse indentations (e.g., transverse indentation lines 902) on the five separated single sub-sheets 261, 262, 263, 264, 265. The sheet pattern formed by step 710 is as follows: Fig. 9 As shown, it can be seen that at this time, the indentation patterns (eg, patterns 801, 802, 803) on adjacent sub-sheets are aligned in the transverse direction. After the operation of step 710 is completed, the process proceeds to step 712.

[0089] In step 712, the five separated single sub-sheets 261, 262, 263, 264, 265 formed with transverse indentations travel to the transverse cutting devices 227, 228, and multiple products 282 with transverse indentations and longitudinal indentations are cut from the five separated single sub-sheets 261, 262, 263, 264, 265 through transverse cutting by the transverse cutting devices 227, 228. After the operation of step 712 is completed, the process goes to step 714, and the indentation forming operation and the slitting operation of the sheet 100 are ended.

[0090] Those skilled in the art should understand that the axial spacing of the multiple indentation rollers in the spare longitudinal indentation forming devices 203, 204 and the axial spacing of the multiple slitting knives in the spare longitudinal slitting devices 207, 208 corresponding to the production of the next specification of the product can be set in the operation before step 714, as long as the setting of the spare longitudinal indentation forming devices 203, 204 and the spare longitudinal slitting devices 207, 208 can be completed before the production of the previous specification of the product is completed. After the production of the previous specification of the product is completed, the longitudinal indentation forming devices 205, 206 and the longitudinal slitting devices 209, 210 are respectively switched to the spare longitudinal indentation forming devices 203, 204 and the spare longitudinal slitting devices 207, 208 through the switching device, and the above operations from step 704 to step 712 are repeated to continue to produce the next specification of the product.

[0091] The purpose of this application is to at least partially solve the technical problems mentioned herein.

[0092] The die-cutting device of the present application has the following beneficial technical effects compared with the prior art:

[0093] First, the die-cutting device of the present application is provided with a longitudinal slitting device and an alignment device, so that the transversely offset patterns on the misprinted sheet are first separated longitudinally by the longitudinal slitting device, and then aligned transversely by the alignment device, thereby facilitating subsequent transverse indentation forming operations and transverse cutting operations. It not only avoids the replacement of the transverse indentation forming device and the transverse cutting device, but also avoids the transverse indentation line on the sheet being unable to press the longitudinal boundary line of the pattern (insufficient transverse indentation), or generating unnecessary transverse indentations on adjacent webs.

[0094] Second, based on the first point, the die-cutting device of the present application is equipped with a longitudinal indentation forming device with adjustable axial spacing and at least one longitudinal slitting device, so that products of different specifications can be produced through a set of molds, avoiding the use of multiple sets of molds or cutters to produce products of different specifications, thereby saving the production and maintenance costs of molds and cutters, and saving storage space for multiple sets of indentation die-cutting rollers.

[0095] Third, the present application can adapt to the production of products of different specifications by adjusting the axial spacing of the longitudinal indentation forming device or the longitudinal slitting device, which is not only easy to operate, but also saves time for replacing molds and die-cutting tools, thereby improving the efficiency of the production process. Since fewer parts need to be adjusted than replacing a whole set of molds or tools in the prior art, the scrap rate of the product will also be reduced.

[0096] Fourth, on the basis of the above three points, the die-cutting device of the present application is also provided with a spare longitudinal indentation forming device and a spare longitudinal slitting device. If the specifications of the product are to be changed, the axial spacing between the spare longitudinal indentation forming device and the spare longitudinal slitting device is adjusted in advance. After the production of the product of the previous specification is completed, the longitudinal indentation forming device and the longitudinal slitting device are respectively switched to the spare longitudinal indentation forming device and the spare longitudinal slitting device through the switching device, so that the die-cutting operation of sheets with different widths can be realized uninterruptedly, thereby saving the time of adjusting the longitudinal indentation forming device and the longitudinal slitting device during the change of product specifications, making the die-cutting operation more efficient and convenient, further improving the efficiency of the production process, and shortening the time required for the process by about 30%.

[0097] Although the present application has been described in conjunction with the examples of the embodiments summarized above, it is obvious to those of ordinary skill in the art that various alternatives, modifications, changes, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent. In addition, the technical effects and / or technical problems described in the present application are exemplary rather than restrictive; so the disclosure in the present application may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present application as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present application. Therefore, the present application is intended to include all known or earlier developed alternatives, modifications, changes, improvements and / or substantially equivalent solutions.

Claims

1. A die-cutting device (200) for performing an indentation forming operation and a slitting operation on a sheet (100) using misprint printing, characterized in that include: A longitudinal indentation forming device (205, 206), the longitudinal indentation forming device (205, 206) being configured to form at least two groups of longitudinal indentations on the sheet (100) conveyed to the longitudinal indentation forming device (205, 206) in the longitudinal direction, wherein the at least two groups of longitudinal indentations are repeated in the transverse direction; At least one longitudinal slitting device (209, 210), the at least one longitudinal slitting device (209, 210) being configured to longitudinally slit the sheet (100) formed with longitudinal indentations to form at least two separate single sub-sheets (261, 262, 263, 264, 265), wherein each single sub-sheet has one set of longitudinal indentations of the at least two sets; An alignment device (212), the alignment device (212) being configured to align the patterns on the at least two single sub-sheets (261, 262, 263, 264, 265) with each other in the transverse direction; A transverse indentation forming device (223, 224), wherein the transverse indentation forming device (223, 224) is configured to form transverse indentations on the at least two aligned single sub-sheets (261, 262, 263, 264, 265); as well as A transverse cutting device (227, 228) is configured to transversely cut the at least two single sub-sheets (261, 262, 263, 264, 265) formed with transverse indentations to form a plurality of separate products (282) having transverse indentations and longitudinal indentations.

2. The die-cutting device according to claim 1, characterized in that: The alignment device (212) comprises at least two offset rollers (411, 412, 413, 414, 415), and the at least two offset rollers (411, 412, 413, 414, 415) are configured to be staggered along the longitudinal direction and respectively define different travel paths from the at least one longitudinal slitting device (209, 210) to the transverse indentation forming device (223, 224) for the at least two single sub-sheets (261, 262, 263, 264, 265), and the different travel paths have different travel distances.

3. The die-cutting device according to claim 2, characterized in that: The longitudinal indentation forming device (205, 206) is a roller pressing device, which includes a plurality of longitudinal indentation upper rollers and a plurality of longitudinal indentation lower rollers, wherein the plurality of longitudinal indentation upper rollers and the plurality of longitudinal indentation lower rollers are configured to be movably arranged parallel to each other in the transverse direction so that the axial spacing between the longitudinal indentation forming devices (205, 206) is adjustable.

4. The die-cutting device according to claim 3, characterized in that: The at least one longitudinal slitting device (209, 210) comprises a plurality of longitudinal slitting devices, which are movably arranged parallel to each other in the transverse direction so that the spacing between the plurality of longitudinal slitting devices is adjustable.

5. The die-cutting device according to claim 4, characterized in that: Each of the longitudinal impression forming device (205, 206), the at least one longitudinal slitting device (209, 210), the transverse impression forming device (223, 224), the transverse cutting device (227, 228) and the nip rollers (221, 222) has a pair of upper and lower rollers, The distance between the upper roller and the lower roller of each pair of the longitudinal indentation forming device (205, 206) and the transverse indentation forming device (223, 224) is adjustable, which can be used to adjust the depth of the indentation.

6. The die-cutting device according to claim 1, characterized in that Also includes: The nip rollers (221, 222) are configured to keep the at least two single sub-sheets (261, 262, 263, 264, 265) output from the alignment device (212) under tension and enter the transverse impression forming device (223, 224) in the same orientation.

7. The die-cutting device according to claim 1, characterized in that: The transverse cutting device (227, 228) has at least one pair of transverse cutting knives, and the at least one pair of transverse cutting knives can cover the at least two single sub-sheets (261, 262, 263, 264, 265) in the transverse direction, so that the at least two single sub-sheets (261, 262, 263, 264, 265) can be transversely cut simultaneously.

8. The die-cutting device according to claim 5, characterized in that Also includes: A control device, which can be used to adjust the spacing between the longitudinal indentation forming devices (205, 206), the spacing between the multiple longitudinal slitting devices, the moving distance of the at least two offset rollers (411, 412, 413, 414, 415), and the spacing between the upper rollers and lower rollers of the longitudinal indentation forming devices (205, 206) and the transverse indentation forming devices (223, 224).

9. The die-cutting device according to claim 6, characterized in that Also includes: A frame, wherein the longitudinal indentation forming device (205, 206), the at least one longitudinal slitting device (209, 210), the clamping rollers (221, 222), the transverse indentation forming device (223, 224) and the transverse cutting device (227, 228) are rotatably arranged on the frame, and the alignment device (212) is arranged on the frame.

10. The die-cutting device according to claim 9, characterized in that: The rotation axes of the longitudinal indentation forming device (205, 206), the transverse indentation forming device (223, 224), the transverse cutting device (227, 228) and the clamping rollers (221, 222) are arranged parallel to the transverse direction.

11. The die-cutting device according to claim 1, characterized in that: Each of the longitudinal indentation forming devices (205, 206) is rotatably adjustable relative to the other longitudinal indentation forming devices (205, 206) around the rotation axis of the longitudinal indentation forming device (205, 206) to accommodate the sheets (100) with different misprints.

12. The die-cutting device according to claim 1, characterized in that Also includes: A standby longitudinal indentation forming device (203, 204), wherein the standby longitudinal indentation forming device (203, 204) is configured to form a longitudinal indentation on the sheet material conveyed to the standby longitudinal indentation forming device in the longitudinal direction, When the specification of the sheet material changes, the spare longitudinal indentation forming device (203, 204) is configured to be used alternately with the longitudinal indentation forming device (205, 206) in the process of forming the longitudinal indentation on the sheet material (100).

13. The die-cutting device according to claim 1, characterized in that Also includes: at least one standby longitudinal slitting device (207, 208), the at least one standby longitudinal slitting device (207, 208) being configured to longitudinally slit the sheet material formed with the longitudinal indentations to form at least two separate single sub-sheets, When the specification of the sheet material changes, the at least one spare longitudinal slitting device (207, 208) is configured to be used alternately with the at least one longitudinal slitting device (209, 210) during the process of longitudinal slitting the sheet material (100).

14. A method for performing an indentation forming operation and a slitting operation on a sheet (100) using misprint printing, characterized in that include: S01, forming a longitudinal indentation on the sheet (100) being transported in the longitudinal direction; S02, longitudinally slitting the sheet (100) formed with the longitudinal indentations to form at least two separate single sub-sheets (261, 262, 263, 264, 265); S03, aligning the patterns on the at least two single sub-sheets (261, 262, 263, 264, 265) with each other in the transverse direction; S04, forming transverse indentations on the at least two aligned single sub-sheets (261, 262, 263, 264, 265); and S05, cutting the at least two single sub-sheets (261, 262, 263, 264, 265) formed with transverse indentations transversely, and cutting a plurality of products (282) having transverse indentations and longitudinal indentations from the at least two single sub-sheets (261, 262, 263, 264, 265).

15. The method according to claim 14, characterized in that Also includes: When it is necessary to produce products of different specifications, a spare longitudinal indentation forming device and a spare longitudinal slitting device are set before the production of the product of the previous specification is completed, and after the production of the product of the previous specification is completed, the longitudinal indentation forming device and the longitudinal slitting device are respectively switched to the spare longitudinal indentation forming device and the spare longitudinal slitting device, and the above steps S01-S05 are repeated to produce the products of different specifications.

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