Winding drum material intermittent conversion structure

Abstract

The utility model discloses a reel material intermittent conversion structure which comprises an unwinding unit and a winding unit. The flat-pressing and flat-working unit comprises a fixed platform and a stamping platform arranged opposite to the fixed platform, and the stamping platform can move relative to the fixed platform so as to be used for stamping the winding drum material; two first traction units; two adjusting units; and two second traction units. According to the utility model, the stop and start of the two first traction units are controlled, so that the winding drum material between the fixed platform and the stamping platform is in a static or moving state, and the conveying requirement of the winding drum material and the stamping requirement of the flattening working unit on the winding drum material are met; and meanwhile, the two adjusting units synchronously move to store or release the coiling block materials before and after stamping, so that stop conversion during stamping in the coiling block material conveying process is adapted, and the coiling block material conveying continuity is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a roll material pause conversion structure. Background Art

[0002] With the rapid development of the printing and packaging industry, the variety of printed products has increased, the number of printing manufacturers has increased, and competition among printers has become increasingly fierce. Improving precision, increasing production efficiency, and reducing production costs are the key factors for businesses to win the competition. Currently, flatbed hot stamping or creasing equipment that uses roll paper as a feed method has flatbed characteristics (characterized by the periodic opening and closing of the upper and lower stamping platforms. When the two stamping platforms are closed, the roll material must be stopped, otherwise the roll material will be broken). This dictates that the roll material must be fed in a periodic, intermittent manner in the flatbed die-stamping unit. Therefore, the existing technology often configures large floating storage racks at the feed and rewind areas of the printing equipment to store paper during pauses and transitions. Typically, such storage devices passively control the paper tension, resulting in unstable tension control.

[0003] Therefore existing technology still needs to be improved and improved. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a roll material stop and conversion structure, aiming to solve the problem that the roll material stop and conversion structure in the prior art adopts a floating storage device with poor performance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A roll material stop and conversion structure includes: an unwinding unit for continuously providing roll material; a flattening working unit, the flattening working unit including a fixed platform and a punching platform arranged opposite to the fixed platform, the punching platform being movable relative to the fixed platform for punching the roll material; two first traction units, respectively located on both sides of the flattening working unit; two adjusting units, one of the adjusting units is located on the roll material conveying path between the unwinding unit and the first traction unit close to the unwinding unit side, and the other adjusting unit is located downstream of the first traction unit away from the unwinding unit side; two second traction units, one of the second traction units is located on the roll material conveying path between the unwinding unit and the adjusting unit close to the unwinding unit side, and the other of the second traction units is located downstream of the other adjusting unit.

[0007] The web stop conversion structure also includes a color mark electric eye for detecting the printed positioning mark on the web. The color mark electric eye is arranged above the web conveying path of the two first traction units and is located on the feeding side of the flattening working unit.

[0008] The first traction unit includes a first traction roller and a first pressure roller arranged opposite to the first traction roller, the wheel surface of the first pressure roller can be pressed or opened with the wheel surface of the first traction roller; the first traction roller is a stepping traction roller, and the two first traction rollers stop or start synchronously to make the web between the fixed platform and the stamping platform in a stationary state or a moving state.

[0009] The adjusting unit includes an adjusting member, and the two adjusting members move synchronously so that the second traction unit continuously pulls the web released by the unwinding unit.

[0010] The adjusting unit further includes a floating roller located on a web conveying path between the adjusting member and the second traction unit.

[0011] The second traction unit includes a second traction roller and a second pressing roller arranged opposite to the second traction roller. The wheel surface of the second pressing roller can be pressed or opened with the wheel surface of the second traction roller. The second traction roller is a uniform speed traction roller.

[0012] The web between the first traction roller and the adjusting member, the web between the floating roller and the adjusting member, and the web between the second traction roller and the floating roller are arranged in parallel.

[0013] The relationship between the second traction roller, the first traction roller and the adjusting member satisfies V0=2V2+V1, where V0 is the linear velocity of the second traction roller, V1 is the linear velocity of the first traction roller, and V2 is the moving velocity of the adjusting member.

[0014] The adjusting unit includes a driving member and a transmission member connected to the adjusting member, and the output end of the driving member is connected to the transmission member so that the transmission member drives the adjusting member to move; the driving member is a motor, and the transmission member includes a motor wheel, a driven pulley, and a synchronous belt sleeved on the motor wheel and the driven pulley, the adjusting member is arranged on the synchronous belt, and the output end of the motor is connected to the motor wheel; the adjusting unit also includes a guide member, which is used to guide the movement of the adjusting member.

[0015] The floating roller is provided with a displacement sensor.

[0016] Compared with the prior art, the present invention provides a roll material pause conversion structure including: an unwinding unit for continuously providing roll material; a flattening working unit, the flattening working unit including a fixed platform and a stamping platform arranged opposite to the fixed platform, the stamping platform being movable relative to the fixed platform for stamping the roll material; two first traction units, respectively located on both sides of the flattening working unit; two adjusting units, one of the adjusting units being located on the roll material conveying path between the unwinding unit and the first traction unit close to the unwinding unit side, and the other adjusting unit being located downstream of the first traction unit away from the unwinding unit side; two second traction units, one of the second traction units being located on the roll material conveying path between the unwinding unit and the adjusting unit close to the unwinding unit side, and the other of the second traction units being located downstream of the other adjusting unit. In the present invention, by controlling the stopping and starting of the two first traction units, the roll material located between the fixed platform and the stamping platform is placed in a stationary or moving state, so as to realize the conveying demand of the roll material and the stamping demand of the flat pressing working unit for the roll material, thereby realizing the stop and conversion of the roll material during the stamping process; at the same time, the present application uses the synchronous movement of the two adjustment units to store or release the roll material before and after stamping, thereby adapting to the stop and conversion during stamping during the conveying process of the roll material, and ensuring the continuity of the roll material conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the prior art web stop and conversion structure provided by the utility model.

[0018] Figure 2 This is a structural schematic diagram of the roll material pause conversion structure provided by the utility model.

[0019] Figure 3 This is a schematic diagram of the connections among the transmission member, the adjustment member and the guide member of the roll material pause conversion structure provided by the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and effect of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that when a component is referred to as being “mounted on,” “fixed on,” or “disposed on” another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being “connected to” another component, it may be directly connected to the other component or there may be an intermediate component.

[0022] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of the present invention are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.

[0023] With the rapid development of the printing and packaging industry, the number of printed products has increased significantly, and the number of printing manufacturers has increased, leading to increasingly fierce competition among printers. Improving precision, increasing production efficiency, and reducing production costs are key factors influencing success. Currently, flatbed stamping or creasing equipment that uses roll paper as a feed method requires periodic intermittent feeding due to its flatbed characteristics (characterized by the periodic opening and closing of the upper and lower stamping platforms, which require the web to be stopped when the two stamping platforms are closed, otherwise the web will be broken). Therefore, existing technologies typically use large floating accumulators at the feed or rewind of the printing equipment to store paper during pauses and transitions. These accumulators typically passively control paper tension, resulting in unstable tension control. Furthermore, the accumulators are often heavy, making high-speed operation difficult.

[0024] In order to solve the above problems, the present invention provides a roll material stop conversion structure, please refer to Figure 2-Figure 3 , including: an unwinding unit 1 for continuously providing a roll of material; a flattening working unit 2, the flattening working unit 2 including a fixed platform 21 and a punching platform 22 arranged opposite to the fixed platform 21, the punching platform 22 can be moved relative to the fixed platform 21 for punching the roll of material; two first traction units, respectively located on both sides of the flattening working unit 2; two adjusting units, one of the adjusting units is located on the roll conveying path between the unwinding unit 1 and the first traction unit close to the unwinding unit 1, and the other adjusting unit is located downstream of the first traction unit away from the unwinding unit 1; two second traction units, one of the second traction units is located on the roll conveying path between the unwinding unit 1 and the adjusting unit close to the unwinding unit 1, and the other of the second traction units is located downstream of the other adjusting unit. In the present invention, by controlling the stopping and starting of the two first traction units, the roll material located between the fixed platform 21 and the stamping platform 22 is placed in a stationary or moving state, so as to realize the conveying demand of the roll material and the stamping demand of the flattening working unit 2 for the roll material; at the same time, the present application uses the synchronous movement of the two adjustment units to store or release the roll material before and after stamping, thereby adapting to the pause and conversion of stamping during the conveying process of the roll material, and ensuring the continuity of the roll material conveying.

[0025] Furthermore, the web stop conversion structure also includes a color mark electric eye 7 for detecting the printed positioning mark on the web. The color mark electric eye 7 is arranged above the web conveying path of the two first traction units and is located on the feeding side of the flattening working unit 2.

[0026] In the present application, the color mark electric eye 7 is arranged closer to the first traction unit on the side of the unwinding unit 1. When the color mark electric eye 7 detects the printed positioning mark on the web, the two first traction units stop after running for a certain phase. The color mark electric eye 7 and the two first traction units are controlled and coordinated to ensure the accuracy of the stamping. It should be noted that how to synchronously control the two first traction units to run for a certain phase when the color mark electric eye 7 detects the printed positioning mark on the web is a prior art, and the specific phase of operation needs to be set according to actual needs. The control principles such as software algorithms specifically involved in this application are not the content to be protected by this application. The utility model of this application lies in the content of the overall structure and control method steps.

[0027] Furthermore, the first traction unit includes a first traction roller and a first pressure roller arranged opposite to the first traction roller, the wheel surface of the first pressure roller can be pressed or opened with the wheel surface of the first traction roller; the first traction roller is a stepping traction roller, and the two first traction rollers stop or start synchronously so that the web between the fixed platform 21 and the stamping platform 22 is in a stationary state or a moving state.

[0028] In the present application, the two first traction units include a first feed traction unit 31 located upstream of the flattening work unit 2 and a first discharge traction unit 32 located downstream of the flattening work unit 2; the first feed traction unit 31 includes a first feed traction roller 311 and a first feed pressure roller 312 arranged opposite to the first feed traction roller 311; the first discharge traction unit 32 includes a first discharge traction roller 321 and a first discharge pressure roller 322 arranged opposite to the first discharge traction roller 321; the fixed platform 21 is located below the web to be stamped, and the stamping platform 22 is located above the web to be stamped. The first feed traction roller 311 and the first discharge traction roller 321 are both stepping traction rollers, which can perform stepping motion according to a predetermined step length and step frequency. Its specific control method and principle belong to the existing technology. The stepping traction roller controls its rotation through a stepping motor or a similar driving device. Due to the precise control of the stepping motor, the stepping traction roller can ensure the accurate positioning of the web during the conveying process, that is, to achieve the precise positioning of the web between the fixed platform 21 and the stamping platform 22, thereby improving the stamping accuracy and stamping efficiency. Compared with the prior art that directly uses adjustment units on both sides of the flat-pressing work unit 2 to control the stop and turn of the web, the first feed traction roller 311 and the first discharge traction roller 321 of the present application are used to control the conversion between the moving state and the static state of the web. This avoids the shaking caused by the dynamic adjustment during the horizontal movement of the adjustment unit, making the positioning accuracy higher and the positioning difficulty lower. The first feed traction roller 311 and the first discharge traction roller 321 cooperate to achieve precise control after the web is stamped, ensuring that the web after stamping can accurately enter the subsequent process or be wound up. In addition, the stepping traction roller can adjust the step length and step frequency as needed to adapt to different web conveying requirements.

[0029] Furthermore, the adjustment unit includes an adjustment member, and the two adjustment members move synchronously to ensure that the second traction unit continuously pulls the web released by the unwinding unit. The adjustment unit also includes a floating roller, located in the web conveying path between the adjustment member and the second traction unit. A displacement sensor (not shown) is provided on the floating roller to provide feedback on the floating roller's position. When the displacement sensor detects a deviation in the floating roller's position, the second traction unit's web conveying speed is controlled to maintain the floating roller in an appropriate position, thereby controlling the web's tension during conveyance.

[0030] In the present application, the two adjustment units include a first adjustment unit 41 (i.e., the aforementioned adjustment unit) located between the first feeding traction unit 31 and the unwinding unit 1 and along the web conveying path, and a second adjustment unit 42 (i.e., the aforementioned other adjustment unit) located downstream of the first discharging traction unit 32. The first adjustment unit 41 includes a first adjusting member 411, a first floating roller 412 located between a second traction unit and the first adjusting member 411 and along the web conveying path, and the second adjustment unit 42 includes a second adjusting member 421, a second floating roller 422 located between the second adjusting member 421 and another second traction unit and along the web conveying path.

[0031] When the color mark electric eye 7 detects the printing positioning mark on the web, the stepper motors of the first feeding traction unit 31 and the first discharging traction unit 32 stop after running for a certain phase. At this time, the web on the web conveying path between the first feeding traction unit 31 and the first discharging traction unit 32 is in a stationary state, and the punching platform 22 moves toward the side of the fixed platform 21 to punch the web. In this process, the web continuously provided by the unwinding unit 11 is conveyed to the second traction unit, the first adjustment unit 41 and the first feeding traction unit 31. Between the stamping platform 22 and the fixed platform 21, the first adjusting member 411 located upstream of the first feeding traction unit 31 moves leftward in the horizontal direction, and the horizontal distance between the first adjusting member 411 and the first feeding traction unit 31 becomes larger, and the horizontal distance between the first adjusting member 411 and the first floating roller 412 becomes larger, so that the length of the web between the first adjusting member 411 and the first feeding traction unit 31 increases, and the length of the web between the first adjusting member 411 and the first floating roller 412 increases, thereby achieving the web. Storage; at the same time, because the other second traction unit is still traction of the web, in order to make up for the shortage of web between the other second traction unit and the second adjusting member 421, the second adjusting member 421 located downstream of the first discharge traction unit 32 moves to the left in the horizontal direction, and the distance between the second adjusting member 421 and the first feed traction unit 12 in the horizontal direction becomes smaller, and the distance between the second adjusting member 421 and the second floating roller 422 in the horizontal direction becomes smaller; at this point, the first adjusting member 411 and the second adjusting member 421 move synchronously to the left and at the same speed. During the process, the web located between the stamping platform 22 and the fixed platform 21 is stationary, and the stamping platform 22 can stamp the web; after the stamping is completed, the first adjusting member 411 and the second adjusting member 421 move to the right synchronously and at the same speed to prepare for the subsequent secondary stamping; the printed positioning mark on the web is detected in real time by the color code electric eye 7, and the start and stop of the first feeding traction unit 31 and the first discharging traction unit 32 are repeatedly controlled, and at the same time, the movement steps of the first adjusting member 411 and the second adjusting member 421 are accompanied, so as to realize the conversion of the web's stop movement.

[0032] It should be noted that, in the preferred embodiment of the present application, the first feed traction unit 31 is located directly above the first floating roller 412, the first adjusting member 411 moves in the horizontal direction, and the first discharge traction unit 32 is located directly above the second floating roller 422, and the second adjusting member 421 moves in the horizontal direction to achieve the storage and release of the web; of course, alternatively, the first feed traction unit 31 and the first floating roller 412, as well as the first discharge traction unit 32 and the second floating roller 422 are all arranged at the same height in the horizontal direction, that is, the first floating roller 412 is located to the right of the first feed traction roller 31, and the second floating roller 422 is located to the left of the first discharge traction roller 32. In this case, the first adjusting member 411 and the second adjusting member 421 can move in the vertical direction to achieve adjustment during the web conveying process. The adaptive modification of its structure is foreseeable and still falls within the scope of protection of the present application; of course, the relative positional relationship between the various components can also be adaptively adjusted as long as the technical effect can be achieved. The specific position of the various components is not limited here.

[0033] The existing technology of the roll material stop conversion structure, such as Figure 1As shown, it usually includes an unwinding unit 1, a first floating storage rack 11, a first stepping traction unit 12, a flattening working unit 2, a second stepping traction unit 21 and a second floating storage rack 22 which are arranged in sequence along the web conveying direction. The first floating storage rack 21 and the second floating storage rack 22 are usually composed of a combination of multiple floating adjustment rollers and fixed rollers. The setting height of the fixed roller is higher than the setting height of the floating adjustment roller, that is, there is a height difference between adjacent rollers in the vertical direction. Usually, the setting heights of multiple fixed rollers are consistent, and the initial setting heights of the floating adjustment rollers are consistent, which is convenient for installation and adjustment. By dynamically adjusting the distance between the floating adjustment roller and the fixed roller in the vertical direction, it can adapt to the flattening working unit 2 to punch the web, thereby realizing the stop and conversion of the web. The disadvantage of the existing technical structure is that the fixed roller and the floating adjustment roller are arranged up and down, and the floating adjustment roller located at the bottom needs to move up and down during the adjustment process, which is prone to shaking, thereby causing the web to vibrate during the conveying process, affecting the tension control of the web; in this application, the first adjusting member 411 is located below the first feed traction roller 311, the first floating roller 412 is located below the first adjusting member 411, the second traction unit close to the unwinding unit 1 is located below the first floating roller 412, the second adjusting member 421 is located below the first discharge traction roller 321, the second floating roller 422 is located below the second adjusting member 421, and the second traction unit away from the unwinding unit 1 is located below the second floating roller 422. The above arrangement makes the web It is always in a horizontal state during the conveying process, and the first adjusting member 411 and the second adjusting member 421 move at the same speed and in the same direction in the horizontal direction to adapt to the pause and conversion during the roll material conveying process, which is beneficial to improve the stability of the roll material conveying and reduce the impact on the roll material tension during the conveying process; alternatively, by adjusting the relative position relationship of each component, the first adjusting member 411 and the second adjusting member 421 can move in the vertical direction to adapt to the pause and conversion during the roll material conveying process, which is a foreseeable adjustment method; in addition, in the prior art, the floating adjusting roller is usually driven by a cylinder. Due to the speed limit of the cylinder, multiple floating adjusting rollers and fixed rollers are required to realize the storage and release of the roll material. The overall structure is relatively complex, the precision matching is relatively strict, and it is relatively difficult.In the present application, the first adjusting member 411 and the second adjusting member 421 are moved horizontally to realize the storage and release of the web, and the movement process is relatively smooth. At the same time, a first floating roller 412 is provided upstream of the first adjusting member 411, and a second floating roller 422 is provided downstream of the second adjusting member 421. The setting of the two floating rollers can dynamically adjust the tension of the web during the entire process of web conveying, which is beneficial to improving the accuracy of web conveying and the stamping accuracy of the stamping platform 22; displacement sensors are also provided on the first floating roller 412 and the second floating roller 422. During the web conveying process, the first floating roller 412 and the second floating roller 422 are moved horizontally. The two floating rollers 422 can compensate for the floating caused by the change of the web tension. The displacement sensor can monitor the position change of the floating roller in real time and feed back the detected changes to the system. When the floating roller position is offset, the speed of the second traction unit conveying the web is adjusted to make the floating roller in a suitable position, so as to control the tension of the web during conveying more stably. The specific principles and the assembly structure of the two belong to the existing technology. The positions of the first floating roller 412 and the second floating roller 422 in the web conveying path of this application and the tension control achieved by the cooperation of the floating roller and the displacement sensor in the web stop conversion structure are also the design points of this application.

[0034] Furthermore, the second traction unit includes a second traction roller and a second pressure roller arranged opposite to the second traction roller, the wheel surface of the second pressure roller can be pressed or opened with the wheel surface of the second traction roller; the second traction roller is a uniform speed traction roller.

[0035] The two second traction units in the present application include a second feed traction unit 61 (i.e., the aforementioned second traction unit) located between the unwinding unit 1 and the first floating roller 412 and arranged along the roll film conveying path, and a second discharge traction unit 62 (i.e., the aforementioned other second traction unit) located downstream of the second floating roller 422; the second feed traction unit 61 includes a second feed traction roller 611 and a second feed pressure roller 612 arranged opposite to the second feed traction roller 611; the second discharge traction unit 62 includes a second discharge traction roller 621 and a second discharge pressure roller 622 arranged opposite to the second discharge traction roller 621; the second feed traction roller 611 and the second discharge traction roller 621 are both uniform speed traction rollers, and the unwinding Unit 1 continuously releases the web and conveys it through the second feed traction roller 611, pulling the web at a constant speed, reducing the tension fluctuations generated after the unwinding unit 1 releases the web, which helps ensure that the web smoothly enters the subsequent process after being released from the unwinding unit 1; after the web is stamped, it enters the winding or other process under the guidance of the second discharge traction roller 621, which helps the web leave the web stop and transfer structure in a stable state, ensuring the flatness of the web and the convenience of subsequent processing; the pressure roller and the uniform traction roller cooperate with each other, the pressure roller provides the necessary pressure and friction, and the uniform traction roller provides stable traction and speed control, ensuring that the web remains continuous, stable and controllable during transportation. In addition, the second pressure roller applies pressure to the web and can also adjust the tightness of the web, which helps maintain the flatness and stability of the web during transportation. In the present application, the wheel surface of the second pressure roller and the wheel surface of the second traction roller can be controlled to be pressed or opened by cylinder drive, and the position relationship of the second pressure roller and the second traction roller can be dynamically controlled, which is beneficial to ensure the stability of the traction and transportation of the web. At the same time, the cylinder controls the second pressure roller with high precision, and can quickly realize the control of the second pressure roller, ensuring the timeliness of the action of the second pressure roller and improving the efficiency of the web transportation. The first pressure roller is controlled in the same way and will not be repeated here.

[0036] Furthermore, the adjusting unit includes a driving member and a transmission member connected to the adjusting member, and an output end of the driving member is connected to the transmission member so that the transmission member drives the adjusting member to move.

[0037] In the present application, there are two groups of adjustment units. The two adjustment units can be connected to their respective transmission members through two driving members. The two driving members simultaneously control the operation of the transmission members connected to the output ends of the two driving members, so that the two transmission members synchronously drive the adjustment members connected to the two transmission members to achieve the purpose of stopping and switching the web. Of course, the two adjustment units in the present application can also use a single driving member as the total power to drive the movement of the two adjustment members. The specific connection structure of this is related to the existing technology and will not be described in detail here. The specific choice of using one driving member or two driving members as the power to drive the movement of the two adjustment members can be set according to actual conditions and will not be described in detail here.

[0038] Furthermore, the driving member is a motor, and the transmission member includes a motor wheel 51, a driven pulley 52, a synchronous belt 53 sleeved on the motor wheel 51 and the driven pulley 52, the adjusting member is arranged on the synchronous belt 53, and the output end of the motor is connected to the motor wheel 51. In this application, the output end of the driving member is connected to the motor wheel 51 to drive the motor wheel 51 to rotate. The motor wheel 51 drives the synchronous belt 53 to work with the cooperation of the driven pulley 52, and then can drive the adjusting member on the synchronous part to move periodically; the synchronous belt 53 is used to drive the adjusting member to move. On the one hand, compared with other transmission methods, the synchronous belt 53 has high transmission efficiency and can quickly adjust the position of the adjusting member. On the other hand, the synchronous belt 53 has high stability during the transmission process, avoiding the problem that other transmission methods generate vibration during the transmission process, affecting the tension of the roll material between the fixed platform 21 and the stamping platform 22, and thus causing poor stamping effect. It should be noted that the present application may also utilize a screw motor to drive the transmission member, a motor and sprocket to drive the transmission member, and so on. The present application does not limit the specific driving member and transmission member as long as they can achieve linear motion of the adjustment member. Furthermore, the adjustment unit also includes a guide member 54 for guiding the movement of the adjustment member.

[0039] The setting direction of the guide member 54 described in the embodiment of the present application is parallel to the direction of the web conveying between the two first traction units; the adjusting member is connected to the synchronous belt 53 and is also connected to the guide member 54. The setting of the guide member 54 plays a guiding role during the movement of the adjusting member, and at the same time ensures the stability of the adjusting member during the movement, which is conducive to ensuring the stability of its tension during the web conveying process, and ensuring the stamping effect of the stamping platform 22 on the web and the accuracy of the stamping position. The guide member 54 can be a slide rail, and the adjusting member can be installed on the slide rail through a slide. The specific installation structure can be set according to actual conditions. When the first adjusting member 411 and the second adjusting member 421 move in the vertical direction to realize the stop and conversion of the web, the setting direction of the guide member 54 is perpendicular to the direction of the web conveying between the two first traction units.

[0040] The web between the first pulling roller and the adjusting member, the web between the floating roller and the adjusting member, and the web between the second pulling roller and the floating roller are arranged in parallel. Preferably, the web between the first pulling roller and the adjusting member, the web between the floating roller and the adjusting member, and the web between the second pulling roller and the floating roller are of the same length. In the present application, the web can be a product such as paper or film. For ease of understanding, the speed relationship during the web conveying process is described by taking the right part of the flattening working unit 2 as an example, as follows: L: the distance between the two printing positioning marks on the web (the length of the web conveyed in each movement cycle); V0: the linear speed of the second feed pulling roller 611 and the second discharge pulling roller 621; V1: the linear speed of the first feed pulling roller 311 and the first discharge pulling roller 321; V2: the movement speed of the adjusting member, the movement speed of the first adjusting member 411 is the same as the movement speed of the second adjusting member 421, but in opposite directions; T: the time of one movement cycle;

[0041] 1. When the web between the punching platform 22 and the fixed platform 21 is stationary, the punching platform 22 punches the web: V0 is the predetermined linear velocity of the second feed traction roller 611, V1 = 0, V2 = -1 / 2V0 (the negative sign indicates a leftward direction, and 1 / 2 is because when the first adjusting member 411 moves, the web wraps at a 180° angle, and the web storage length is twice the distance moved by the first adjusting member 411);

[0042] Second, when the first traction unit is normally conveying a web, and the web between the stamping platform 22 and the fixed platform 21 is in motion: V0 is the predetermined linear velocity of the second feed traction roller 611, V1 = L / t2, and V2 = (V0-V1) / 2. It should be noted that t2 is the time the first feed traction roller 311 conveys the web, which accounts for approximately 2 / 3 of the entire motion cycle, t2 = 2 / 3T. V0 = 2V2 + V1. The sum of the conveying speeds of the first feed traction roller 311 and the first adjustment member 411 is equal to the linear velocity of the second traction roller. Therefore, the relationship between the second traction roller, the first traction roller, and the adjustment member satisfies V0 = 2V2 + V1, where V0 is the linear velocity of the second traction roller, V1 is the linear velocity of the first traction roller, and V2 is the moving velocity of the adjustment member.

[0043] The present application also provides a control method for a web stop conversion structure, comprising:

[0044] The unwinding unit 1 releases the roll material without stopping the machine;

[0045] The roll material released by the unwinding unit 1 is pulled by the second traction unit; the two first traction units stop working, and the roll material between the fixed platform 21 and the stamping platform 22 is in a stationary state; the stamping platform 22 moves close to the side of the fixed platform 21 and stamps the roll material, and the adjusting unit moves away from the first traction unit on its side, and the other adjusting unit synchronously moves towards the first traction unit on its side; or, the stamping platform 22 moves away from the side of the fixed platform 21; the two first traction units are started, and the roll material between the fixed platform 21 and the stamping platform 22 is in a moving state; one adjusting unit moves close to the first traction unit on its side, and the other adjusting unit synchronously moves away from the first traction unit on its side; the other second traction unit pulls the roll material after stamping.

[0046] Compared with the existing technology, the present application controls the start and stop of the two first traction units so that the roll material between the stamping platform 22 and the fixed platform 21 can be switched between a moving state and a stationary state, which is beneficial to improving the position accuracy of the roll material transportation and ensuring the accuracy of the stamping position of the stamping platform 22; through the synchronous movement of the two adjustment units and the start and stop of the two first traction units, the unwinding unit 1 is adapted to the continuous unwinding and the continuous traction and transportation of the roll material by the two second traction units, thereby realizing the pause conversion of the roll material, ensuring the stability of the tension during the roll material transportation process, and solving the problem of the roll material transportation speed being affected by the large counterweight of the floating storage rack.

[0047] To sum up, the utility model provides a roll material pause conversion structure, which includes: an unwinding unit for continuously providing roll material; a flat pressing working unit, the flat pressing working unit including a fixed platform and a stamping platform arranged opposite to the fixed platform, the stamping platform can move relative to the fixed platform for stamping the roll material; two first traction units, respectively located on both sides of the flat pressing working unit; two adjusting units, one of the adjusting units is located on the roll material conveying path between the unwinding unit and the first traction unit close to the unwinding unit side, and the other adjusting unit is located downstream of the first traction unit away from the unwinding unit side; two second traction units, one of the second traction units is located on the roll material conveying path between the unwinding unit and the adjusting unit close to the unwinding unit side, and the other of the second traction units is located downstream of the other adjusting unit. In the present invention, by controlling the stopping and starting of the two first traction units, the roll material located between the fixed platform and the stamping platform is placed in a stationary or moving state, so as to realize the conveying demand of the roll material and the stamping demand of the flattening working unit for the roll material; at the same time, the present application uses the synchronous movement of the two adjustment units to store or release the roll material before and after stamping, thereby adapting to the pause and conversion of stamping during the conveying process of the roll material, and ensuring the continuity of the roll material conveying.

[0048] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and utility model concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A roll material stop and conversion structure, characterized in that: include: An unwinding unit for continuously providing roll material; a flattening working unit, wherein the flattening working unit includes a fixed platform and a punching platform arranged opposite to the fixed platform, and the punching platform is movable relative to the fixed platform for punching the roll material; two first traction units, respectively located on both sides of the flattening working unit; two adjusting units, one of the adjusting units is located on the roll material conveying path between the unwinding unit and the first traction unit close to the unwinding unit, and the other adjusting unit is located downstream of the first traction unit away from the unwinding unit; two second traction units, one of the second traction units is located on the roll material conveying path between the unwinding unit and the adjusting unit close to the unwinding unit, and the other of the second traction units is located downstream of the other adjusting unit.

2. The web stop conversion structure according to claim 1, characterized in that: It also includes a color mark electric eye for detecting the printed positioning mark on the web. The color mark electric eye is arranged above the web conveying path of the two first traction units and is located on the feeding side of the flattening working unit.

3. The web stop conversion structure according to claim 1, characterized in that: The first traction unit includes a first traction roller and a first pressure roller arranged opposite to the first traction roller, the wheel surface of the first pressure roller can be pressed or opened with the wheel surface of the first traction roller; the first traction roller is a stepping traction roller, and the two first traction rollers stop or start synchronously to make the web between the fixed platform and the stamping platform in a stationary state or a moving state.

4. The web stop conversion structure according to claim 3, characterized in that: The adjusting unit includes an adjusting member, and the two adjusting members move synchronously so that the second traction unit continuously pulls the web released by the unwinding unit.

5. The web stop conversion structure according to claim 4, characterized in that: The adjusting unit further includes a floating roller located on a web conveying path between the adjusting member and the second traction unit.

6. The web stop and conversion structure according to claim 5, characterized in that: The second traction unit includes a second traction roller and a second pressing roller arranged opposite to the second traction roller. The wheel surface of the second pressing roller can be pressed or opened with the wheel surface of the second traction roller. The second traction roller is a uniform speed traction roller.

7. The web stop and conversion structure according to claim 6, characterized in that: The web between the first traction roller and the adjusting member, the web between the floating roller and the adjusting member, and the web between the second traction roller and the floating roller are arranged in parallel.

8. The web stop and conversion structure according to claim 7, characterized in that: The relationship between the second traction roller, the first traction roller and the adjusting member satisfies V0=2V2+V1, where V0 is the linear velocity of the second traction roller, V1 is the linear velocity of the first traction roller, and V2 is the moving velocity of the adjusting member.

9. The web stop and conversion structure according to claim 4, characterized in that: The adjusting unit includes a driving member and a transmission member connected to the adjusting member, and the output end of the driving member is connected to the transmission member so that the transmission member drives the adjusting member to move; the driving member is a motor, and the transmission member includes a motor wheel, a driven pulley, and a synchronous belt sleeved on the motor wheel and the driven pulley, the adjusting member is arranged on the synchronous belt, and the output end of the motor is connected to the motor wheel; the adjusting unit also includes a guide member, which is used to guide the movement of the adjusting member.

10. The web stop and conversion structure according to claim 5, characterized in that: The floating roller is provided with a displacement sensor.

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