Flat-press flat hot stamping and vertical paper feeding hot stamping method and equipment for reducing consumption of electroplated aluminum

Abstract

The present invention discloses a flat-pressing, flat-stamping, vertical paper-feeding hot stamping method and equipment for reducing the consumption of anodized aluminum, which relates to the field of packaging and printing technology and is applicable to the hot stamping process of patterns with equal spacing on cigarette cartons. The main purpose is to reduce the consumption of anodized aluminum film during the flat-pressing, flat-stamping process of cigarette cartons. This application combines the requirements of hot stamping products with the structural characteristics of existing hot stamping equipment. After specifically limiting the parameters of the hot stamping pattern and the size of the hot stamping foil, and optimizing and adjusting the hot stamping foil skipping parameters, it adopts a hot stamping method for cigarette cartons with vertical paper feeding and double hot stamping. It fully utilizes the correspondence and distribution relationship between the hot stamping foil reel and the hot stamping pattern, and adjusts the spacing between two simultaneously hot stamped patterns in the prior art from only being able to re-insert a new hot stamping pattern to being able to insert multiple new hot stamping patterns. Comprehensively calculated, it can save about 20% of the hot stamping foil, resulting in higher economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging and printing, and in particular to a flat-pressing, flat-stamping, vertical paper-feeding hot stamping method and equipment for reducing consumption of electroplated aluminum. Background Art

[0002] Cigarette packaging has three functions: product protection, anti-counterfeiting, decorative aesthetics, and product promotion. Without good packaging, there's no good market. As a crucial intermediary layer, the cigarette carton serves as the bridge between the box and the case. It requires both structural strength to ensure transport and storage, and aesthetics to ensure product promotional effectiveness, as it comes into direct contact with consumers during sales.

[0003] In recent years, cigarette packaging in my country has made significant progress, with some packaging far surpassing that of renowned international brands. Hot stamping is a crucial finishing touch, utilizing the principle of heat transfer to transfer the aluminum layer from anodized aluminum to the substrate, creating a unique metallic effect. The anodized aluminum foil used is a hot stamping material made by applying a coating and vacuum evaporation to a thin film substrate. Its rich colors and diverse styles create a multi-layered visual effect for printed products.

[0004] But there are also some problems: first, some companies are too obsessed with luxurious packaging, and the level of packaging is getting higher and higher, resulting in packaging materials accounting for a very large proportion of product costs; second, the use of non-environmentally friendly materials such as non-degradable aluminum foil, gold and silver cardboard, mirror paper, etc. is increasing. These packaging materials are difficult to recycle and degrade after being discarded, causing environmental pollution and waste of resources; third, the use of these high-end materials reduces the speed and efficiency of packaging machines.

[0005] As cigarette label printing becomes more market-oriented, the tobacco industry is facing many new opportunities, challenges and topics in terms of how cigarette manufacturers can improve cigarette packaging to increase product competitiveness while complying with international trends and laws and regulations. Competition in the printing industry is becoming increasingly fierce. On the premise of ensuring product quality, only by saving energy and reducing consumption and lowering corporate production costs can companies gain a foothold in the fierce competition. This is a realistic and urgent issue that companies must face.

[0006] In actual production, the hot stamping production of soft cigarette strips has always adopted flat pressing and hot stamping. The patterns to be hot stamped on the paper of the strip are arranged vertically and horizontally, and there is a certain interval between adjacent patterns. If the size of these intervals is greater than or equal to the size of the patterns to be hot stamped, a hot stamping position can be rearranged between the two patterns hot stamped for the first time on the electrochemical aluminum foil to improve the utilization rate of the hot stamping foil. Otherwise, hot stamping cannot be repeated. According to the current hot stamping process, a single hot stamping method is adopted after several strips are spliced ​​together. At least one identical hot stamping pattern is set on the front and back of a single strip. The hot stamping patterns on the front and back of the same strip are arranged vertically, and the hot stamping patterns at the same position on different strips are arranged horizontally. The vertical spacing of the hot stamping patterns is slightly greater than The vertical dimension of the hot stamping pattern is such that one pattern can be inserted between two patterns. Although the horizontal spacing between the hot stamping patterns at the same position on different cartons that are hot stamped at the same time is much larger than the horizontal dimension of the hot stamping pattern, the width of a standard single roll of hot stamping foil is only slightly larger than the horizontal dimension of a single hot stamping pattern. A substantial increase in the width of the hot stamping foil will make it extremely difficult to control the flatness and tension of the hot stamping foil, as well as a series of other control problems. Normal reeling and unreeling of the hot stamping foil cannot be achieved, and therefore new hot stamping patterns cannot be inserted horizontally. According to this rule, the current utilization rate of electroplated aluminum in the hot stamping method has room for improvement, especially as the sales price of cigarette packs has dropped significantly, reducing the consumption of electroplated aluminum in cartons and reducing costs are imminent. Summary of the Invention

[0007] In order to solve the problems in the background technology, the present invention provides a flat-press flat hot stamping and vertical paper feeding hot stamping method and equipment that reduces the consumption of electroplated aluminum, so that the consumption of electroplated aluminum used for hot stamping of cigarette box packaging is reduced by a certain proportion.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a flat-press hot stamping method with vertical paper feeding that reduces the consumption of anodized aluminum, suitable for the hot stamping process of patterns with equal spacing on cigarette cartons, wherein the spacing between adjacent hot stamping patterns in the longitudinal direction of the hot stamping cartons is much smaller than the spacing between adjacent hot stamping patterns in the transverse direction, characterized in that it comprises the following steps:

[0009] 1. Determine the number of pieces, paper feed direction and foil size based on the size of the box to be stamped and the size and spacing of the pattern to be stamped.

[0010] ①. Determine the number of hot stamping. According to the external dimensions of the cigarette carton products and the upper limit of the hot stamping machine, make it clear that this plan can simultaneously perform hot stamping of two or more even-numbered carton products. It is preferred to perform hot stamping of two carton products at the same time, that is, "double hot stamping".

[0011] ②. Set the paper feed direction of the strip box to be stamped to the vertical direction. The vertical direction refers to the normal reading direction perpendicular to the printed image and text on the strip box. That is, the two strip boxes to be stamped are set on the stamping station according to the front and back position relationship. The stamping patterns on the front and back of the same strip box are on the same straight line perpendicular to the paper feed direction. The two strip boxes are set front and back, and all the stamping patterns on them are processed at the same time.

[0012] ③. Determine the relationship between the position and spacing of the patterns to be stamped on the front and back of the same box and the corresponding width of each hot stamping foil. Different patterns to be stamped on the front and back of the same box correspond to independent hot stamping foil reels. The width L of each hot stamping foil reel is greater than the maximum dimension D1 of a single pattern to be stamped in the direction perpendicular to the paper feed, but less than 2D1.

[0013] ④. Determine the relationship between the position and spacing of the same pattern to be ironed on different boxes and the width of the same roll of hot stamping foil; the patterns to be ironed at the same position on different boxes correspond to the same hot stamping foil reel, and the size of the pattern to be ironed parallel to the paper feed direction is D2. The distance between two patterns to be ironed at the same position on different boxes parallel to the paper feed direction is H, and 5D2<H<6D2.

[0014] 2. Determine the skipping parameters of the hot stamping foil and improve the skipping equipment.

[0015] ①. Improve the stability of the hot stamping foil conveying by the aluminum pressing wheel. The aluminum pressing wheel determines the precision of the hot stamping jump step and the accuracy of the hot stamping foil conveying amount to avoid the phenomenon of missing hot stamping of images and texts. Choose an aluminum pressing wheel with a surface hardness of 60-70HA and control the error of the hot stamping foil conveying amount to 0.1-0.2mm.

[0016] ② Control the lateral swing amplitude of the hot stamping foil between the hot stamping foil jumping mechanism and the hot stamping plate. Add clamping ring guide rings to the three aluminum shafts between the above-mentioned hot stamping foil jumping mechanism and the hot stamping plate, and the distance between each group of clamping ring guide rings is gradually reduced.

[0017] ③. Optimize the skip parameters of the hot stamping foil, and limit the skip to two parts: lateral offset and longitudinal skip. The lateral offset is performed when the hot stamping foil reel starts the next hot stamping after completing a complete hot stamping. The lateral offset refers to the repeated displacement of the hot stamping foil reel in the direction perpendicular to the paper feed, and the distance of each displacement is ≤1 / 2D1. The longitudinal skip is to control the longitudinal contraction of the hot stamping foil before entering the hot stamping plate to stagger the parts of the hot stamping foil that have been processed in the previous hot stamping. The distance of the longitudinal skip is greater than or equal to D2 and less than or equal to 2D2.

[0018] Preferably, in order to improve the smoothness of paper feeding before the strip box enters the hot stamping station and ensure the accurate overprinting of the graphics and texts of the final product, a large paper feeding wheel group and two small paper feeding wheel groups are arranged in sequence before the hot stamping station; the former drives the strip box to be hot stamped along the paper feeding direction through a single brush wheel with a large diameter, ensuring the fast and accurate movement of the strip box in the paper feeding direction; the latter sets two sets of parallel small paper feeding wheel groups with small diameter brush wheels within the range of a strip box to drive the strip box to feed paper, ensuring the consistency of the strip box movement perpendicular to the paper feeding direction, avoiding misalignment, and improving overprinting accuracy.

[0019] Preferably, according to the forward direction of the hot stamping foil, the spacing of the clamping ring guide rings on the first aluminum shaft between the hot stamping foil jumping mechanism and the hot stamping plate is set to ≤4mm, the spacing of the clamping ring guide rings on the second aluminum shaft is set to ≤3mm, and the spacing of the clamping ring guide rings on the last aluminum shaft in front of the hot stamping plate is set to ≤2mm.

[0020] The second object of the present invention is to provide a flat-press flat hot stamping and vertical paper feeding hot stamping device that reduces the consumption of anodized aluminum, comprising a reeling mechanism, a hot stamping mechanism, and a reeling mechanism, characterized in that it also comprises a hot stamping foil jumping mechanism, a hot stamping foil lateral stabilizing mechanism, and a paper feeding mechanism arranged between the reeling mechanism and the hot stamping mechanism;

[0021] The hot stamping foil jumping mechanism includes two groups of hot stamping foil longitudinal adjustment devices respectively arranged at the outlet end of the hot stamping foil unwinding shaft and the inlet end of the hot stamping plate, and a hot stamping foil tension adjustment device arranged between the two groups of hot stamping foil longitudinal adjustment devices; wherein, the two groups of hot stamping foil longitudinal adjustment devices include a bracket, a telescopic cylinder installed on the bracket, and an aluminum pressure wheel and a corresponding aluminum support wheel installed at the end of the cylinder telescopic shaft. The surface hardness of the aluminum pressure wheel is 60-70HA, and it has a good friction coefficient with the hot stamping foil, which is conducive to controlling the error of the hot stamping foil conveying amount during jumping; the front hot stamping foil longitudinal adjustment device arranged near one end of the unwinding shaft is the main jumping device, and the rear hot stamping foil longitudinal adjustment device near the hot stamping plate side is used to supplement the jumping distance completed by the front hot stamping foil longitudinal adjustment device in forward and reverse directions, thereby further improving the jumping accuracy; the tension adjustment device is a combination of a tunnel-type negative pressure suction structure and a movable guide roller.

[0022] The hot stamping foil lateral stabilization mechanism is arranged between the hot stamping foil longitudinal adjustment device and the hot stamping plate, and includes three aluminum shafts. A pair of coaxial clamping ring guide rings are provided on each aluminum shaft. The distance between the two clamping ring guide rings is greater than the width of the hot stamping foil, and starting from the front hot stamping foil longitudinal adjustment device, the distance between the clamping ring guide rings on each aluminum shaft gradually decreases.

[0023] The paper feeding mechanism is arranged on a paper feeding platform between the rear hot stamping foil longitudinal adjustment device and the hot stamping plate. A bracket with the same paper feeding direction is arranged above the paper feeding platform, and a large paper feeding hair wheel group and two small paper feeding hair wheel groups are arranged on the bracket in sequence. The two small paper feeding hair wheel groups are installed in parallel at a position close to the hot stamping plate. The large paper feeding hair wheel and the small paper feeding hair wheel are both provided with downward pressing springs to make them fit the strip box to be transported.

[0024] Beneficial effects:

[0025] Compared with the horizontal paper feeding hot stamping method adopted in the prior art, this application combines the requirements of hot stamping products and the structural characteristics of existing hot stamping equipment. After special limitations on the hot stamping pattern parameters and the size of the hot stamping foil, and optimization and adjustment of the hot stamping foil jump parameters, it adopts a vertical paper feeding, double-stitching hot stamping method for cigarette cartons. It fully utilizes the correspondence and distribution relationship between the hot stamping foil reel and the hot stamping pattern, and adjusts the spacing between two simultaneously hot stamped patterns in the prior art from only being able to reinsert a new hot stamping pattern to being able to insert multiple new hot stamping patterns. Comprehensive calculation shows that it can save about 20% of the hot stamping foil, resulting in higher economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the relationship between the strip box, pattern and electroplated aluminum during normal paper feeding in the prior art.

[0027] Figure 2 It is a schematic diagram of the relationship between the strip box, pattern and electroplated aluminum when paper is fed horizontally in a specific implementation method.

[0028] Figure 3 It is a structural diagram of hot stamping equipment.

[0029] Figure 4 It is a schematic structural diagram of a hot stamping foil longitudinal adjustment device.

[0030] Figure 5 It is a structural diagram of the lateral stabilization mechanism of the hot stamping foil.

[0031] Figure 6 It is a structural diagram of the large paper feeding wheel group.

[0032] Figure 7 It is a structural diagram of the small paper feeding wheel group.

[0033] In the figure: soft strip box 1', hot stamping pattern 2', anodized aluminum reel 3', hot stamping foil longitudinal adjustment device 1, hot stamping foil tension adjustment device 2, bracket 101, telescopic cylinder 102, aluminum pressing wheel 103, aluminum supporting wheel 104, movable guide roller 3, aluminum shaft 4, clamping ring guide ring 5, paper feeding platform 6, mounting frame 7, large paper feeding wheel group 8, small paper feeding wheel group 9, and downward pressure spring 10. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and examples.

[0035] It should be noted that the terms used in the following description refer to the directions in the accompanying drawings, and the accompanying drawings are in a very simplified form and use non-precise ratios, which are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0036] First reference Figure 1 This embodiment is directed to a "Yuxi" soft cigarette carton 1'. Its hot stamping pattern 2' is a diamond shape and is produced using the traditional horizontal paper feed hot stamping method, employing horizontal double hot stamping. The hot stamping pattern 2' on the soft cigarette carton 1' has a vertical dimension of 50 mm and a vertical spacing of 75 mm. Each vertical column has two hot stamping patterns 2'. Calculated based on the vertical spacing, 75 mm ÷ 50 mm = 1.5 patterns. A new pattern can be inserted between two vertical patterns.

[0037] In addition, the horizontal dimension of the hot stamping pattern 2' on the soft strip box 1' is 60 mm. The two horizontal hot stamping patterns 2' belong to two soft strip boxes 1' respectively, and two independent electroplated aluminum reels 3' are used respectively. The spacing between the two horizontal hot stamping patterns 2' is 250 mm, but the width of a single electroplated aluminum reel 3' is only 75 mm. There is no electroplated aluminum film corresponding to most of the area between the two horizontal patterns; (75-60)÷2=7.5 (mm) There is an excess of 7.5 mm on both sides of the hot stamping pattern on the electroplated aluminum foil, and the width of the electroplated aluminum cannot be reduced.

[0038] Combined with the above parameters, based on the standard length of 1800m per roll of anodized aluminum hot stamping foil, the consumption is as follows:

[0039] The total area of ​​electroplated aluminum is: 1800×0.075×2=270㎡. The total number of hot stamping patterns on the resulting strip box is 6557. The area of ​​electroplated aluminum consumed by a single hot stamping pattern is 270÷6557=0.04117㎡ / sheet.

[0040] Using the hot stamping method described in this application, first, based on the appearance size of the cigarette box product and the hot stamping upper limit of the flat-press hot stamping machine, it is clear that this solution is to perform hot stamping on two box products at the same time, that is, to perform "double hot stamping".

[0041] Secondly, the paper feed direction of the strip box to be hot stamped is set to the vertical direction, and the vertical direction refers to the normal reading direction perpendicular to the printed image and text on the strip box, that is, the two strip boxes to be hot stamped are set on the hot stamping station according to the front and back position relationship, and the hot stamping patterns on the front and back of the same strip box are on the same straight line perpendicular to the paper feed direction. The two strip boxes are set front and back, and all the hot stamping patterns thereon are processed at the same time; the relationship between the position and spacing of the patterns to be hot stamped on the front and back of the same strip box and the corresponding width of each hot stamping foil, the different patterns to be hot stamped on the front and back of the same strip box correspond to independent hot stamping foil reels, the width of each hot stamping foil reel is 90mm, the horizontal dimension of a single pattern to be hot stamped is 50mm, and the vertical dimension is 60mm. At this time, the horizontal spacing between the two patterns is 75mm, and the vertical spacing is 250mm. Combined with the characteristics of the diamond hot stamping pattern, its adjacent patterns can be staggered, so the available size of the vertical spacing is actually greater than 250mm, see for details. Figure 2 , that is to say, in the longitudinal direction, the blank electrochemical aluminum film between two adjacent patterns can accommodate at least 5 hot stamping patterns.

[0042] In addition, based on the above parameters, adaptive adjustments were made to the corresponding equipment. First, to improve the stability of the hot stamping foil conveying by the aluminum pressing wheel 103, which determines the precision of the hot stamping step and the accuracy of the hot stamping foil conveying amount to avoid the phenomenon of missing hot stamping images and texts, the aluminum pressing wheel 103 with a surface hardness of 60-70HA was selected, and the error of the hot stamping foil conveying amount was controlled within 0.1-0.2mm.

[0043] refer to Figure 3-Figure 7 In order to control the lateral swing amplitude of the hot stamping foil between the hot stamping foil jumping mechanism and the hot stamping plate, a clamping ring guide ring 5 is added to the three aluminum shafts 4 between the hot stamping foil jumping mechanism and the hot stamping plate, wherein the spacing between each group of clamping ring guide rings 5 ​​is gradually reduced; according to the forward direction of the hot stamping foil, the spacing of the clamping ring guide rings 5 ​​set on the first aluminum shaft 4 between the hot stamping foil jumping mechanism and the hot stamping plate is set to ≤4mm, the spacing of the clamping ring guide rings 5 ​​set on the second aluminum shaft 4 is set to ≤3mm, and the spacing of the clamping ring guide rings 5 ​​set on the last aluminum shaft 4 before the hot stamping plate is set to

[0044] ≤2mm;

[0045] Furthermore, the skipping step is defined as a lateral offset and a longitudinal skipping step. The lateral offset is performed when the foil reel completes a complete hot stamping process and begins the next hot stamping process. The lateral offset refers to the repeated displacement of the foil reel perpendicular to the paper feed direction, with each displacement distance of approximately 25mm. The longitudinal skipping step controls the longitudinal contraction of the foil before it enters the hot stamping plate to avoid the areas that have been processed by the previous hot stamping process. The longitudinal skipping step distance is 90mm.

[0046] Finally, in order to improve the smoothness of paper feeding before the strip box enters the hot stamping station and ensure the accurate overprinting of the graphics and texts of the final product, a large paper feeding wheel group 8 and two small paper feeding wheel groups 9 are arranged in sequence before the hot stamping station; the former drives the strip box to be hot stamped along the paper feed direction through a single brush wheel with a large diameter, ensuring the fast and accurate movement of the strip box in the paper feed direction; the latter sets two groups of parallel small paper feeding wheel groups 9 with small diameter brush wheels within the range of a strip box to drive the strip box to feed paper, ensuring the consistency of the strip box movement perpendicular to the paper feed direction, avoiding misalignment, and improving overprinting accuracy.

[0047] Under this scheme, the total area of ​​the anodized aluminum is calculated based on a standard 1800m long aluminum coil: 1800×0.09×2=324㎡. The total number of hot stamping patterns on the resulting strip box is 9890, and the area of ​​anodized aluminum consumed by a single hot stamping pattern is 327÷9890=0.03276㎡ / sheet.

[0048] Comparison of old and new hot stamping methods:

[0049] Original method: 1800×0.075×2=270㎡ 270÷6557=0.04117㎡ / sheet;

[0050] New method: 1800×0.09×2=324㎡ 324÷9890=0.03276㎡ / sheet;

[0051] The new hot stamping method can save 20.42% of electrochemical aluminum on the original basis.

[0052] In addition, in order to complete the above-mentioned hot stamping process, the results of the original hot stamping equipment were optimized accordingly. The new hot stamping equipment includes a rewinding mechanism, a hot stamping mechanism and a rewinding mechanism, and also includes a hot stamping foil jumping mechanism, a hot stamping foil lateral stabilization mechanism and a paper feeding mechanism arranged between the rewinding mechanism and the hot stamping mechanism; the hot stamping foil jumping mechanism includes two sets of hot stamping foil longitudinal adjustment devices 1 respectively arranged at the outlet end of the hot stamping foil unwinding shaft and the inlet end of the hot stamping plate, and a hot stamping foil tension adjustment device 2 arranged between the two sets of hot stamping foil longitudinal adjustment devices 1; wherein, the two sets of hot stamping foil longitudinal adjustment devices 1 include a bracket

[0053] 101. A telescopic cylinder 102 installed on the bracket 101, and an aluminum pressing wheel 103 and a corresponding aluminum supporting wheel 104 installed at the end of the cylinder's telescopic shaft. The surface hardness of the aluminum pressing wheel 103 is 60-70HA, and it has a good friction coefficient with the hot stamping foil, which is beneficial to controlling the error of the hot stamping foil conveying amount during skipping; the front hot stamping foil longitudinal adjustment device 1 arranged near one end of the unwinding shaft is the main skipping device, and the rear hot stamping foil longitudinal adjustment device 1 near the hot stamping plate side is used to supplement the skipping distance completed by the front hot stamping foil longitudinal adjustment device 1 in the forward and reverse directions, further improving the skipping accuracy; the tension adjustment device 2 is a combination of a tunnel-type negative pressure suction structure and a movable guide roller 3.

[0054] The hot stamping foil lateral stabilization mechanism is arranged between the hot stamping foil longitudinal adjustment device 1 and the hot stamping plate, and includes three aluminum shafts 4. Each aluminum shaft 4 is provided with a pair of coaxial clamping rings 5. The spacing between the two clamping ring guide rings 5 ​​is greater than the width of the hot stamping foil, and starting from the front hot stamping foil longitudinal adjustment device 1, the spacing between the clamping ring guide rings 5 ​​on each aluminum shaft 4 gradually decreases from 4mm in the first group to 2mm; the paper feeding mechanism is arranged on the paper feeding platform 6 between the rear hot stamping foil longitudinal adjustment device 1 and the hot stamping plate, and a mounting frame 7 with the same paper feeding direction is arranged above the paper feeding platform 6, and a large paper feeding wheel group 8 and two small paper feeding wheel groups 9 are arranged on the mounting frame 7 in sequence, among which the two small paper feeding wheel groups 9 are installed in parallel near the hot stamping plate, and the large paper feeding wheel group 8 and the small paper feeding wheel group 9 are both provided with a downward pressure spring 10 to make them fit the strip box to be conveyed.

Claims

1. A flat-press hot stamping method for vertical paper feeding that reduces the consumption of anodized aluminum, suitable for the hot stamping process of patterns with equal spacing on cigarette cartons, wherein the spacing between adjacent hot stamping patterns in the longitudinal direction of the hot stamping cartons is much smaller than the spacing between adjacent hot stamping patterns in the transverse direction, characterized in that: The following steps are involved:

1. According to the size of the box to be stamped and the size and spacing of the pattern to be stamped, combined with the stamping equipment, determine the number of stitching, paper feed direction and stamping foil size ① Determine the number of hot stamping operations. Based on the dimensions of the cigarette cartons and the upper limit of the hot stamping capacity of the flat-press hot stamping machine, make sure that this solution can simultaneously hot stamp two or more cartons in an even number. ② Set the paper feeding direction of the strips to be stamped to the vertical direction, which refers to the normal reading direction of the printed images on the strips. That is, place the two strips to be stamped on the stamping station in a front-to-back relationship. The stamping patterns on the front and back of the same strip are on the same straight line perpendicular to the paper feeding direction. The two strips are placed front and back, and all the stamping patterns on them are processed simultaneously; ③. Determine the relationship between the position and spacing of the patterns to be stamped on the front and back of the same box and the width of the corresponding hot stamping foil. Different patterns to be stamped on the front and back of the same box correspond to independent hot stamping foil reels. The width L of each hot stamping foil reel is greater than the maximum dimension D1 of a single pattern to be stamped in the direction perpendicular to the paper feed, but less than 2D1. ④. Determine the relationship between the position and spacing of the same pattern to be ironed on different boxes and the width of the same roll of hot stamping foil. The pattern to be ironed at the same position on different boxes corresponds to the same hot stamping foil reel. The dimension of the pattern to be ironed parallel to the paper feed direction is D2. The distance between two patterns to be ironed at the same position on different boxes parallel to the paper feed direction is H. 5D2<H<6D2; 2. Determine the skipping parameters of hot stamping foil and improve the skipping equipment ①. Improve the stability of the hot stamping foil conveying by the aluminum pressing wheel. The aluminum pressing wheel determines the accuracy of the hot stamping step and the amount of hot stamping foil conveyed, avoiding the phenomenon of missing hot stamping of images and texts. Choose an aluminum pressing wheel with a surface hardness of 60-70HA, and control the error of the hot stamping foil conveying amount within 0.1-0.2mm. ② To control the lateral swing amplitude of the hot stamping foil between the hot stamping foil jumping mechanism and the hot stamping plate, clamping ring guide rings are added to the three aluminum shafts between the hot stamping foil jumping mechanism and the hot stamping plate, and the spacing between each set of clamping ring guide rings is gradually reduced; ③. Optimize the skip parameters of the hot stamping foil, and limit the skip to two parts: lateral offset and longitudinal skip. The lateral offset is performed when the hot stamping foil reel starts the next hot stamping after completing a complete hot stamping. The lateral offset refers to the repeated displacement of the hot stamping foil reel in the direction perpendicular to the paper feed, and the distance of each displacement is ≤1 / 2D1. The longitudinal skip is to control the longitudinal contraction of the hot stamping foil before entering the hot stamping plate to stagger the parts of the hot stamping foil that have been processed in the previous hot stamping. The distance of the longitudinal skip is greater than or equal to D2 and less than or equal to 2D2.

2. A flat stamping and vertical paper feeding hot stamping method for reducing the consumption of anodized aluminum according to claim 1, characterized in that: The stability of paper feeding of the strip box is controlled before the hot stamping station. The specific method is to set up a large paper feeding wheel group and two small paper feeding wheel groups in sequence; the former drives the strip box to be hot stamped along the paper feeding direction through a single brush wheel with a large diameter, ensuring the fast and accurate feeding direction of the strip box; the latter sets two parallel small paper feeding wheel groups with small diameter brush wheels within the range of a strip box to drive the paper feeding of the strip box.

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