Cold stamping equipment capable of realizing repeated utilization of gold stamping film and control method of cold stamping equipment

Abstract

The invention discloses cold stamping equipment capable of achieving repeated utilization of a gold stamping film and a control method thereof.The cold stamping equipment comprises a mounting frame, and the mounting frame is provided with an unwinding device, a winding device, a first conveying part, a hot stamping assembly, a second conveying assembly, a backing material conveying assembly, a glue spraying device and an electric control device; the second conveying assembly comprises a hot stamping film conveying roller and a backing material conveying roller, the hot stamping assembly comprises a hot stamping roller and a supporting roller which rotate synchronously, and the hot stamping machine is characterized by further comprising a tension sensor, a first color code electric eye and a second color code electric eye, and the first color code electric eye is fixed to the mounting frame and corresponds to a backing material; the tension sensor is arranged between the first conveying piece and the hot stamping roller, and the second color code electric eye is fixed to the mounting frame and corresponds to the hot stamping film; according to the cold stamping equipment, the tension applied to the gold stamping film before hot stamping can be adjusted, so that the gold stamping film corresponds to the position of a pattern to be printed on the backing material.

Description

Technical Field

[0001] The present invention relates to the technical field of cold stamping printing equipment, and particularly relates to a cold stamping device capable of realizing multiple uses of a hot stamping film and a control method thereof. Background Art

[0002] As a unique printing process, hot stamping has received increasing attention. Hot stamping is divided into hot stamping and cold stamping. Among them, the hot stamping foil used in the hot stamping process is coated with hot melt adhesive on the back. During hot stamping, the hot melt adhesive is melted by the temperature and pressure of the hot stamping plate to achieve the transfer of the hot stamping foil. Cold stamping is a technology that uses a UV curable adhesive to transfer the hot stamping foil on the hot stamping film to the printing material by means of a printing plate. Compared with the traditional hot stamping technology, the whole process does not require heating or a special metal hot stamping plate, so a large amount of energy can be saved, and it is a new technology that meets the requirements of green environmental protection.

[0003] A key factor restricting printing enterprises from investing in cold stamping equipment is that the post-stamping speed after connection should be consistent with the printing speed. Unlike hot stamping equipment, it is impossible to use skip steps to save the hot stamping foil. When printing one by one, there will be blank areas between the objects to be printed. Therefore, after the hot stamping film is used once, there will be unused hot stamping foil areas on the hot stamping film, resulting in waste of the hot stamping film.

[0004] To alleviate the above problems, the hot stamping film on the hot stamping film winding roller is re-placed on the hot stamping film unwinding roller for secondary use. However, the secondary use of the previous hot stamping film was easily failed. The reason is that during the first use of the hot stamping film, it is tightened under the action of the natural tension between each transmission roller, so that the hot stamping film will be slightly stretched (this slight stretch cannot be restored after reducing or canceling the tension), resulting in an increase in the distance between the adjacent used hot stamping foil plate patterns on the hot stamping film (that is: the unused hot stamping foil area), and the distance between it and each plate pattern on the object to be printed is different and there is a position corresponding error; moreover, this error will accumulate with the conveying, resulting in an increasingly large subsequent error and affecting the subsequent multiple uses of the hot stamping film. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the above-mentioned prior art, and to provide a cold stamping device capable of realizing multiple uses of a hot stamping film, which can adjust the tension of the hot stamping film before hot stamping and make the position of the hot stamping film correspond to the pattern to be printed on the base material.

[0006] The purpose of the present invention is to provide a control method for the cold stamping device capable of realizing multiple uses of a hot stamping film according to the above.

[0007] The purpose of the present invention is achieved as follows: A cold stamping device capable of realizing the multiple reuse of hot stamping film, including an installation frame, on which are provided: an unwinding device, a winding device, a first conveying member, a hot stamping assembly, a second conveying assembly, a base material conveying assembly, a glue spraying device and an electric control device. It is characterized in that it further includes a tension sensor, a first color mark electric eye and a second color mark electric eye; The second conveying assembly includes a hot stamping film conveying roller and a base material conveying roller; The unwinding device, the winding device, the hot stamping assembly, the first conveying member and the hot stamping film conveying roller cooperate to convey the hot stamping film. One end of the hot stamping film placed on the unwinding device passes through the first conveying member, the hot stamping assembly, the hot stamping film conveying roller in sequence and then is recycled to the winding device; The base material conveying assembly is used to convey the base material through the hot stamping assembly. The base material passing through the hot stamping assembly is continuously conveyed to the corresponding position by the base material conveying roller, and the glue spraying device sprays glue onto the position of the pattern to be printed on the base material; The hot stamping assembly includes a hot stamping roller and a supporting roller that rotate synchronously. Both the base material and the hot stamping film pass through between the mutually attached hot stamping roller and the supporting roller, so that the hot stamping foil on the hot stamping film is transferred to the pattern to be printed on the base material; The first color mark electric eye is fixed on the installation frame and corresponds to the base material; The tension sensor is arranged between the first conveying member and the hot stamping roller. The second color mark electric eye is fixed on the installation frame and corresponds to the hot stamping film; The winding device, the first conveying member, the supporting roller, the base material conveying assembly, the glue spraying device, the tension sensor, the first color mark electric eye and the second color mark electric eye are respectively electrically connected to the electric control device.

[0008] This cold stamping device capable of realizing the multiple reuse of hot stamping film, by adding a tension sensor, a first color mark electric eye and a second color mark electric eye, the first color mark electric eye can detect the corresponding position on the base material and feedback the position signal to the electric control device, the second color mark electric eye can detect the corresponding position on the hot stamping film and feedback the position signal to the electric control device, and the tension sensor detects the tension value of the hot stamping film before hot stamping. Furthermore, the electric control device can adjust the speed of the first conveying member according to the above position signal and tension value, that is: realize the adjustment of the tension of the hot stamping film before hot stamping, so that the hot stamping film can correspond to the pattern to be printed on the base material during subsequent secondary hot stamping and even multiple hot stampings, and ensure the normal use of secondary hot stamping and even multiple hot stampings.

[0009] The object of the present invention can also be solved by adopting the following technical measures: Specifically, further, it further includes a fixed seat. The fixed seat includes an upper supporting section and a lower connecting section which are connected to each other. The lower connecting section is connected to the mounting frame. The upper supporting section is located on one side of the tension sensor. The second color mark electric eye is fixedly connected to the upper supporting section. The upper supporting section of the fixed seat provides an installation carrier for the second color mark electric eye, and realizes the stable installation of the second color mark electric eye on the mounting frame through the lower connecting section of the fixed seat. Its installation is relatively simple and the installation effect is good. At the same time, the upper supporting section is located on one side of the tension sensor, which is also convenient for the second color mark electric eye to detect the corresponding position of the hot stamping film passing through the tension sensor.

[0010] Specifically, further, it further includes a UV curing lamp. A fixed frame is arranged on the mounting frame and the fixed frame is located on one side of the supporting roller. A through hole is opened in the fixed frame. The UV curing lamp is fixed in the through hole and the UV curing lamp is close to one side of the supporting roller, so that the UV curing lamp irradiates the base material and the hot stamping film after hot stamping and compounding. This enables the hot stamping foil stamped on the base material to be firmly connected to the pattern to be printed on the base material. Moreover, the through hole of the fixed frame provides an installation space for the UV curing lamp and also limits the irradiation range of the UV curing lamp, so that the UV curing lamp stably irradiates the specified position on the supporting roller.

[0011] Specifically, further, the base material conveying assembly includes a driving conveying roller and a plurality of driven conveying rollers. The first color mark electric eye is located on one side of one of the driven conveying rollers. A driving motor is connected to one side of the driving conveying roller and the driving motor is electrically connected to the electric control device. The base material conveying assembly only needs to set a driving conveying roller and a plurality of driven conveying rollers to realize the position transmission of the base material on the mounting frame. Its structure is simple and the transmission effect is good. Moreover, the first color mark electric eye is located on one side of one of the driven conveying rollers, which is also convenient for the first color mark electric eye to detect the corresponding position of the base material passing through the driven conveying roller.

[0012] Specifically, further, a digital nozzle is further arranged on the mounting frame and the digital nozzle is close to a plurality of driven conveying rollers. Along the advancing direction of the base material, the first color mark electric eye, the digital nozzle and the hot stamping assembly are arranged in sequence. The digital nozzle constitutes the glue spraying device. The digital nozzle can spray glue to the corresponding position of the base material on a plurality of driven conveying rollers according to the signal transmitted by the first color mark electric eye.

[0013] Specifically, further, the unwinding device is an unwinding roller, the winding device is a winding roller, the first conveying member is a first conveying roller, driving motors are connected to the winding roller, the first conveying roller and the supporting roller, and the driving motors are electrically connected to the electric control device. Its setting is simple and the implementation effect is good.

[0014] Specifically further, a third conveying roller is also provided between the hot stamping assembly and the base material conveying roller. The base material conveying roller is located on one side of the third conveying roller, and the hot stamping film conveying roller is located above the third conveying roller. So that the hot stamping film after hot stamping is recovered to the winding device via the hot stamping film conveying roller after passing through the third conveying roller, and the base material is conveyed to the corresponding position via the base material conveying roller after passing through the third conveying roller, realizing the separation of the base material and the hot stamping film after hot stamping.

[0015] Another object of the present invention is achieved as follows: A control method for a cold stamping device capable of realizing the multiple utilization of a hot stamping film according to the above, characterized in that it includes the following steps: S1, preparation before startup. Pull out one end of the hot stamping film from the unwinding device, pass through the first conveying member, the tension sensor, between the mutually attached hot stamping roller and the support roller, and the hot stamping film conveying roller in sequence, and then fix it on the winding device for winding. The tension sensor detects the tension received by the hot stamping film in real time and feeds the initial tension value back to the control system of the electric control device. One end of the base material located outside the first mounting frame passes through between the mutually attached hot stamping roller and the support roller via the base material conveying assembly, and then continues to be conveyed to the other side of the mounting frame via the base material conveying roller; S2, the first hot stamping. The electric control device controls the corresponding components to start working. The base material is conveyed by the base material conveying assembly and passes through the first color mark electric eye and the glue spraying device in sequence and then enters the hot stamping assembly to cooperate with the hot stamping film. During this process, the first color mark electric eye detects the position of the pattern to be printed on the base material and sends the corresponding signal to the control system, so that the control system controls the glue spraying device to spray glue on the pattern to be printed on the base material; Input a relatively large tension value into the control system. The control system calculates the tension difference according to this tension value and the initial tension value, and then controls the speed of the first conveying member according to the tension difference, so that the speed difference between the first conveying member and the hot stamping roller becomes larger, that is: the tension received by the hot stamping film before entering the hot stamping assembly becomes larger, and then the hot stamping film is stretched by a large amplitude; When the hot stamping film enters the hot stamping assembly, the hot stamping tin part on the hot stamping film that contacts the glue will be transferred to the pattern to be printed on the base material. The hot stamping film after passing through the hot stamping assembly is fixed on the winding device via the hot stamping film conveying roller. During this process, due to the small torque of the winding device, the tension received by the hot stamping film after passing through the hot stamping assembly becomes smaller, and the hot stamping film will contract due to the previous large amplitude stretching, and then the distance between two adjacent used hot stamping foil pattern widths on the hot stamping film will be reduced, which will be smaller than the distance size of the pattern to be printed on the base material; S3. Second hot stamping. The hot stamping film on the winding device is re-placed on the unwinding device for secondary hot stamping. During the secondary hot stamping process, the control system of the electric control device real-time detects the distance between two adjacent used stamping foils' pattern areas on the hot stamping film according to the second color mark electric eye, and the distance of the pattern to be printed on the base material detected by the first color mark electric eye. Then the control system calculates the error amount between the two. Meanwhile, using the initial tension value detected by the tension sensor, the electric control device obtains the tension amount to be compensated according to the above error amount and the initial tension value, and controls the speed difference between the first conveyor and the hot stamping roller according to the tension amount to be compensated, and then controls the speed of the first conveyor, so that the distance between two adjacent used stamping foils' pattern areas on the hot stamping film is equal to the distance of the pattern to be printed on the base material, ensuring the position correspondence when the two enter the hot stamping assembly for hot stamping and lamination, and ensuring the stable use of the secondary hot stamping.

[0016] The control method of this cold stamping device. During the first hot stamping process, before the hot stamping film enters the hot stamping assembly, the hot stamping film is greatly stretched with a large tension. And after passing through the hot stamping assembly, the hot stamping film will shrink due to the reduced tension, and the distance between two adjacent used stamping foils' pattern areas on the hot stamping film will be reduced, thus providing an adjustment space for the hot stamping film during the second hot stamping process, which is convenient for the control system of the electric control device to regulate the speed of the first conveyor according to the position signals detected by the first color mark electric eye and the second color mark electric eye and the initial tension value detected by the tension sensor, and then achieve the regulation of the tension on the hot stamping film, ensuring the position correspondence between the hot stamping film and the pattern to be printed on the base material, and ensuring the normal use of the secondary hot stamping and even multiple hot stampings.

[0017] The beneficial effects of the present invention are as follows: (1) This cold stamping device that can realize the multiple utilization of the hot stamping film. By adding a tension sensor, a first color mark electric eye and a second color mark electric eye, the first color mark electric eye can detect the corresponding position on the base material and feedback the position signal to the electric control device, the second color mark electric eye can detect the corresponding position on the hot stamping film and feedback the position signal to the electric control device, and the tension sensor detects the tension value of the hot stamping film before hot stamping. Then the electric control device can regulate the speed of the first conveyor according to the above position signals and tension value, that is: realize the adjustment of the tension on the hot stamping film before hot stamping, so that during the subsequent secondary hot stamping and even multiple hot stampings, the hot stamping film can correspond to the pattern to be printed on the base material, ensuring the normal use of the secondary hot stamping and even multiple hot stampings.

[0018] (2) The upper placement section of the fixed seat provides an installation carrier for the second color mark electric eye, and the second color mark electric eye is stably installed on the installation frame through the lower connection section of the fixed seat. Its installation is relatively simple and the installation effect is good. At the same time, the upper placement section is located on one side of the tension sensor, which is also convenient for the second color mark electric eye to detect the corresponding position of the hot stamping film passing through the tension sensor.

[0019] (3) The hot stamping foil hot stamped on the base material can be firmly connected to the pattern to be printed on the base material. Moreover, the through hole of the fixing frame provides an installation space for the UV curing lamp and also limits the irradiation range of the UV curing lamp, so that the UV curing lamp stably irradiates the specified position on the support roller. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the cold stamping device that can realize the multiple utilization of the hot stamping film of the present invention.

[0021] Figure 2 It is a perspective view of the cold stamping device that can realize the multiple utilization of the hot stamping film of the present invention.

[0022] Figure 3 It is Figure 2 The enlarged view of part A of

[0023] Figure 4 It is Figure 2 The schematic diagram from another angle of Detailed Embodiment

[0024] The present invention will be further described below in conjunction with the drawings and embodiments: Embodiment, as shown in Figures 1 to 4 A cold stamping device that can realize the multiple utilization of the hot stamping film, including an installation frame 1. A unwind device 2, a rewind device 3, a first conveying member 4, a hot stamping assembly 5, a second conveying assembly 6, a base material conveying assembly 7, a glue spraying device 8 and an electric control device are arranged on the installation frame 1. It is characterized in that it further includes a tension sensor 9, a first color mark electric eye 10 and a second color mark electric eye 20; The second conveying assembly 6 includes a hot stamping film conveying roller 61 and a base material conveying roller 62. The unwind device 2, the rewind device 3, the hot stamping assembly 5, the first conveying member 4 and the hot stamping film conveying roller 61 cooperate to convey the hot stamping film. One end of the hot stamping film placed on the unwind device 2 passes through the first conveying member 4, the hot stamping assembly 5, the hot stamping film conveying roller 61 in sequence and is recycled to the rewind device 3; The base material conveying assembly 7 is used to convey the base material through the hot stamping assembly 5. The base material passing through the hot stamping assembly 5 is continuously conveyed to the corresponding position by the base material conveying roller 62, and the glue spraying device 8 sprays the glue onto the position of the pattern to be printed on the base material; The hot stamping assembly 5 includes a synchronously rotating hot stamping roller 51 and a supporting roller 52. Both the base material and the hot stamping film pass through between the mutually attached hot stamping roller 51 and the supporting roller 52, so that the hot stamping foil on the hot stamping film is transferred to the pattern to be printed on the base material; The first color mark electric eye 10 is fixed on the mounting frame 1 and the first color mark electric eye 10 is arranged corresponding to the base material; The tension sensor 9 is arranged between the first conveying member 4 and the hot stamping roller 51. The second color mark electric eye 20 is fixed on the mounting frame 1 and the second color mark electric eye 20 is arranged corresponding to the hot stamping film; The winding device 3, the first conveying member 4, the supporting roller 52, the base material conveying assembly 7, the glue spraying device 8, the tension sensor 9, the first color mark electric eye 10 and the second color mark electric eye 20 are respectively electrically connected to the electric control device; The electric control device can be a common microcomputer, which is built-in with a control system and is not shown.

[0025] As a specific solution, it further includes a fixing seat 30. The fixing seat 30 includes a connected upper placing section 301 and a lower connecting section 302. The lower connecting section 302 is connected to the mounting frame 1. The upper placing section 301 is located on one side of the tension sensor 9. The second color mark electric eye 20 is fixedly connected to the upper placing section 301.

[0026] As a more specific solution, it further includes a UV curing lamp 53. A fixing frame 11 is arranged on the mounting frame 1 and the fixing frame 11 is located on one side of the supporting roller 52. A through hole 12 is opened on the fixing frame 11. The UV curing lamp 53 is fixed in the through hole 12 and the UV curing lamp 53 is close to one side of the supporting roller 52, so that the UV curing lamp 53 irradiates the base material and the hot stamping film after hot stamping and compounding.

[0027] As a more specific solution, the base material conveying assembly 7 includes a driving conveying roller 71 and a plurality of driven conveying rollers 72. The first color mark electric eye 10 is located on one side of one of the driven conveying rollers 72. A driving motor 100 is connected to one side of the driving conveying roller 71 and the driving motor 100 is electrically connected to the electric control device.

[0028] In this embodiment, a digital nozzle is further arranged on the mounting frame 1 and the digital nozzle is close to several driven conveying rollers 72. Along the advancing direction of the base material, the first color mark electric eye 10, the digital nozzle and the hot stamping assembly 5 are arranged in sequence. The digital nozzle constitutes the glue spraying device 8.

[0029] As a more specific solution, the unwinding device 2 is an unwinding roller, the winding device 3 is a winding roller, the first conveying member 4 is a first conveying roller. Driving motors 100 are connected to the winding roller, the first conveying roller and the supporting roller 52, and the driving motors 100 are electrically connected to the electric control device.

[0030] As a better implementation, a third conveying roller 63 is further provided between the hot stamping assembly 5 and the base material conveying roller 62. The base material conveying roller 62 is located on one side of the third conveying roller 63, and the hot stamping film conveying roller 61 is located above the third conveying roller 63.

[0031] The base material of the hot stamping film is a PET polyester film, which will be greatly stretched when receiving a large tension (such as 180 N), and will shrink when being wound up with a small tension (such as 100 N) after stretching.

[0032] The tension sensor 9 can be an SA cantilever type tension sensor produced by Huizhou Aibo Intelligent Control Equipment Co., Ltd., website: www.aiboauto.com, model: SA-020-000106.

[0033] A control method for a cold stamping device capable of realizing the multiple utilization of a hot stamping film according to the above, characterized by comprising the following steps: S1. Preparation before startup: Pull out one end of the hot stamping film from the unwinding device 2, pass it through the first conveying member 4, the tension sensor 9, between the mutually attached hot stamping roller 51 and the supporting roller 52, and the hot stamping film conveying roller 61 in sequence, and then fix it on the winding device 3 for winding. The tension sensor 9 detects the tension received by the hot stamping film in real time and feeds the initial tension value back to the control system of the electric control device; one end of the base material located on one outer side of the installation frame 1 passes through between the mutually attached hot stamping roller 51 and the supporting roller 52 via the base material conveying assembly 7, and then continues to be conveyed to the other outer side of the installation frame 1 via the base material conveying roller 62; S2. First hot stamping: The electric control device controls the corresponding components to start working. The base material is conveyed by the base material conveying assembly 7 and passes through the first color mark electric eye 10 and the glue spraying device 8 in sequence and then enters the hot stamping assembly 5 to cooperate with the hot stamping film. During this process, the first color mark electric eye 10 detects the position of the pattern to be printed on the base material and gives the corresponding signal to the control system, so that the control system controls the glue spraying device 8 to spray glue on the pattern to be printed on the base material; Input a relatively large tension value into the control system. The control system calculates the tension difference based on this tension value and the initial tension value, and then controls the speed of the first conveying member 4 according to the tension difference, so that the speed difference between the first conveying member 4 and the hot stamping roller 51 becomes larger, that is: the tension received by the hot stamping film before entering the hot stamping assembly 5 becomes larger, and further the hot stamping film is stretched by a large amplitude; When the hot stamping film enters the hot stamping assembly 5, the hot stamping tin part on the hot stamping film that contacts the glue will be transferred to the pattern to be printed on the base material. The hot stamping film after passing through the hot stamping assembly 5 is fixed on the winding device 3 via the hot stamping film conveying roller 61. During this process, due to the small torque of the winding device 3, the tension on the hot stamping film after passing through the hot stamping assembly 5 becomes smaller. The hot stamping film will shrink due to the previous large-scale stretching, and then the distance between the pattern areas of two adjacent used hot stamping foils on the hot stamping film will be reduced, which will be smaller than the distance of the pattern to be printed on the base material; the winding device 3 is a winding roller, so the torque of the winding device 3 is controlled by the driving motor 100. The torque value of the winding device 3 is actually the torque value of the driving motor 100.

[0034] S3, Second hot stamping. Place the hot stamping film on the unwinding device 2 again for secondary hot stamping. During the secondary hot stamping process, the control system of the electronic control device detects the distance between the pattern areas of two adjacent used hot stamping foils on the hot stamping film in real time according to the second color mark photoelectric eye 20 and the distance of the pattern to be printed on the base material detected by the first color mark photoelectric eye 10. Then the control system calculates the error amount between the two. At the same time, using the initial tension value detected by the tension sensor 9, the electronic control device obtains the amount of tension to be compensated according to the above error amount and the initial tension value. According to the amount of tension to be compensated, it controls the speed difference between the first conveying member 4 and the hot stamping roller 51, and then controls the speed of the first conveying member 4, so that the distance between the pattern areas of two adjacent used hot stamping foils on the hot stamping film is equal to the distance of the pattern to be printed on the base material, ensuring the position correspondence when the two enter the hot stamping assembly 5 for hot stamping and lamination, and ensuring the stable use of the secondary hot stamping; the principle is the same for the third or even multiple uses of the hot stamping film.

[0035] As a more specific solution, in the above steps S2 and S3, the speed of the support roller 52 is kept constant, so that the speed of the hot stamping roller 51 rotating synchronously with it is kept constant, which is beneficial to keeping the hot stamping speed between the hot stamping roller 51 and the support roller 52 constant and ensuring the hot stamping effect. On the other hand, since the speed of the hot stamping roller 51 is constant, only by adjusting the speed of the first conveying member 4 can the tension on the hot stamping film between the first conveying member 4 and the hot stamping roller 51 be adjusted.

[0036] More specifically, during the first hot stamping, the hot stamping film is conveyed with a large tension (such as: 180N) before entering the hot stamping assembly, and the hot stamping film after passing through the hot stamping assembly is wound with a small tension (such as: 100N); because the hot stamping film is covered with hot stamping tin, making a large-scale stretching adjustment to the hot stamping film will not affect the position correspondence between the hot stamping film and the pattern to be printed on the base material.

[0037] During the second hot stamping, first convey the hot stamping film at a general tension (e.g., 150 N). The control system of the electric control device detects in real time, according to the second color mark photocell 20, the distance between two adjacent used stamping foil pattern areas on the hot stamping film (i.e., the pattern area of the unused stamping foil) and, according to the first color mark photocell 10, the distance of the pattern to be printed on the base material; if the pattern area of the unused stamping foil on the hot stamping film moves towards the winding direction, the control system adjusts the tension to a small tension (e.g., 100 N, and it is necessary to increase the speed of the first conveyor 4), so that the pattern area of the unused stamping foil on the hot stamping film moves towards the unwinding direction and corresponds to the pattern to be printed on the base material; on the contrary, if the pattern area of the unused stamping foil on the hot stamping film moves towards the unwinding direction, the control system adjusts the tension to a large tension (e.g., 180 N, and it is necessary to decrease the speed of the first conveyor 4), so that the pattern area of the unused stamping foil on the hot stamping film moves towards the winding direction and corresponds to the pattern to be printed on the base material; if the positions correspond, continue to convey the hot stamping film at a general tension (e.g., 150 N) and perform corresponding operations before entering the hot stamping assembly.

[0038] As another control method of this cold stamping device, it is similar to the control method of the above-mentioned first embodiment. The difference is that in step S2, during the first hot stamping process, the hot stamping film is under the same tension during the conveying process before hot stamping and the conveying and winding process after hot stamping, and this tension is the general tension, and the first hot stamping is completed; before the second hot stamping, place the hot stamping film back on the unwinding device 2, so that one end of the hot stamping film passes through the first conveyor 4, the hot stamping assembly 5, and the hot stamping film conveying roller 61 in sequence and then is recycled to the winding device 3. During this process, the base material does not participate in the conveying. Before the hot stamping film enters the hot stamping assembly 5, convey the hot stamping film at a large tension, and the hot stamping film after passing through the hot stamping assembly 5 is recycled to the winding device 3 at a small tension. This method can also well achieve the contraction effect of the hot stamping film before the second hot stamping and provide an adjustment space for the second hot stamping.

Claims

1. A cold stamping device capable of realizing multiple uses of a hot stamping film, comprising an installation frame (1), wherein a film unwinding device (2), a film rewinding device (3), a first conveying member (4), a hot stamping assembly (5), a second conveying assembly (6), a base material conveying assembly (7), a glue spraying device (8) and an electric control device are arranged on the installation frame (1), and it is characterized in that, It further includes a tension sensor (9), a first color mark electric eye (10) and a second color mark electric eye (20); The second conveying component (6) includes a hot stamping film conveying roller (61) and a base material conveying roller (62), The unwind device (2), the rewind device (3), the hot stamping assembly (5), the first conveying member (4) and the hot stamping film conveying roller (61) cooperate to convey the hot stamping film. One end of the hot stamping film placed on the unwind device (2) passes through the first conveying member (4), the hot stamping assembly (5), and the hot stamping film conveying roller (61) in sequence and is then recycled to the rewind device (3); The base material conveying component (7) is used to convey the base material through the hot stamping assembly (5). The base material passing through the hot stamping assembly (5) is continuously conveyed to the corresponding position by the base material conveying roller (62), and the glue spraying device (8) sprays glue onto the position of the pattern to be printed on the base material; The hot stamping assembly (5) includes a hot stamping roller (51) and a support roller (52) that rotate synchronously. Both the base material and the hot stamping film pass through between the mutually attached hot stamping roller (51) and support roller (52), so that the hot stamping foil on the hot stamping film is transferred to the pattern to be printed on the base material; The hot stamping assembly (5) further includes a UV curing lamp (53). A fixing frame (11) is provided on the mounting frame (1), and the fixing frame (11) is located on one side of the support roller (52). A through hole (12) is opened in the fixing frame (11), and the UV curing lamp (53) is fixed in the through hole (12) and on the side of the UV curing lamp (53) close to the support roller (52), so that the UV curing lamp (53) irradiates the base material and the hot stamping film after hot stamping and lamination; The first color mark electric eye (10) is fixed on the mounting frame (1) and the first color mark electric eye (10) corresponds to the base material; The tension sensor (9) is arranged between the first conveying member (4) and the hot stamping roller (51). The second color mark electric eye (20) is fixed on the mounting frame (1) and the second color mark electric eye (20) corresponds to the hot stamping film; The rewind device (3), the first conveying member (4), the support roller (52), the base material conveying component (7), the glue spraying device (8), the tension sensor (9), the first color mark electric eye (10) and the second color mark electric eye (20) are respectively electrically connected to the electric control device.

2. The cold stamping device capable of realizing multiple uses of the hot stamping film according to claim 1, characterized in that, It further includes a fixing seat (30). The fixing seat (30) includes a connected upper placing section (301) and a lower connecting section (302). The lower connecting section (302) is connected to the mounting frame (1). The upper placing section (301) is located on one side of the tension sensor (9), and the second color mark electric eye (20) is fixedly connected to the upper placing section (301).

3. The cold stamping device capable of realizing multiple uses of the hot stamping film according to claim 1, characterized in that, The base material conveying component (7) includes a driving conveying roller (71) and a plurality of driven conveying rollers (72). The first color mark electric eye (10) is located on one side of one of the driven conveying rollers (72). A driving motor (100) is connected to one side of the driving conveying roller (71), and the driving motor (100) is electrically connected to the electric control device.

4. The cold stamping device capable of realizing multiple uses of the hot stamping film according to claim 3, characterized in that, A digital nozzle is also provided on the installation frame (1), and the digital nozzle is close to a number of driven conveying rollers (72). Along the advancing direction of the base material, the first color mark electric eye (10), the digital nozzle, and the hot stamping assembly (5) are arranged in sequence. The digital nozzle constitutes the glue spraying device (8).

5. The cold stamping device capable of realizing multiple uses of the hot stamping film according to claim 1, characterized in that, The unwinding device (2) is an unwinding roller, the winding device (3) is a winding roller, the first conveying member (4) is a first conveying roller, and a driving motor (100) is connected to each of the winding roller, the first conveying roller, and the supporting roller (52). The driving motor (100) is electrically connected to the electric control device.

6. The cold stamping device capable of realizing multiple uses of the hot stamping film according to claim 1, characterized in that, A third conveying roller (63) is further arranged between the hot stamping assembly (5) and the base material conveying roller (62). The base material conveying roller (62) is located on one side of the third conveying roller (63), and the hot stamping film conveying roller (61) is located above the third conveying roller (63).

7. A control method for a cold stamping device capable of realizing multiple uses of a hot stamping film according to any one of claims 1-6, characterized in that, Including the following steps: S1. Preparation before startup: Pull out one end of the hot stamping film from the unwinding device (2), and pass it through the first conveying member (4), the tension sensor (9), between the mutually attached hot stamping roller (51) and the supporting roller (52), and the hot stamping film conveying roller (61) in sequence, and then fix it on the winding device (3) for winding. The tension sensor (9) detects the tension received by the hot stamping film in real time and feeds the initial tension value back to the control system of the electric control device; One end of the base material on the outer side of the installation frame (1) passes through between the mutually attached hot stamping roller (51) and the supporting roller (52) via the base material conveying assembly (7), and then continues to be conveyed to the other outer side of the installation frame (1) via the base material conveying roller (62); S2. First hot stamping: The electric control device controls the corresponding components to start working. The base material is conveyed by the base material conveying assembly (7) and passes through the first color mark electric eye (10) and the glue spraying device (8) in sequence and then enters the hot stamping assembly (5) to cooperate with the hot stamping film. During this process, the first color mark electric eye (10) detects the position of the pattern to be printed on the base material and gives the corresponding signal to the control system, so that the control system controls the glue spraying device (8) to spray glue on the pattern to be printed on the base material; Input a relatively large tension value into the control system. The control system calculates the tension difference based on this tension value and the initial tension value, and then controls the speed of the first conveying member (4) according to the tension difference, so that the speed difference between the first conveying member (4) and the hot stamping roller (51) becomes larger, that is: the tension received by the hot stamping film before entering the hot stamping assembly (5) becomes larger, and then the hot stamping film is stretched by a large margin; When the hot stamping film enters the hot stamping assembly (5), the hot stamping tin part on the hot stamping film that contacts the glue will be transferred to the pattern to be printed on the base material. The hot stamping film after passing through the hot stamping assembly (5) is fixed on the winding device (3) via the hot stamping film conveying roller (61). During this process, due to the small torque of the winding device (3), the tension received by the hot stamping film after passing through the hot stamping assembly (5) becomes smaller, and the hot stamping film will contract due to the large stretching before, and then the distance between two adjacent used hot stamping foil pattern widths on the hot stamping film becomes smaller, which will be smaller than the distance size of the pattern to be printed on the base material; S3. Second hot stamping. The hot stamping film on the rewinding device (3) is re-placed on the unwinding device (2) for secondary hot stamping. During the secondary hot stamping process, the control system of the electric control device detects the distance between adjacent used stamping foils' pattern widths on the hot stamping film in real time according to the second color mark electric eye (20) and the distance of the pattern to be printed on the base material detected by the first color mark electric eye (10). Then the control system calculates the error amount between the two. At the same time, using the initial tension value detected by the tension sensor (9), the electric control device obtains the amount of tension to be compensated according to the above error amount and the initial tension value, and controls the speed difference between the first conveying member (4) and the hot stamping roller (51) according to the amount of tension to be compensated, and then controls the speed of the first conveying member (4), so that the distance between adjacent used stamping foils' pattern widths on the hot stamping film is equal to the distance of the pattern to be printed on the base material, ensuring the position correspondence when the two enter the hot stamping assembly (5) for hot stamping and lamination, and ensuring the stable use of the secondary hot stamping.

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