Winding drum material intermittent conversion structure and control method

Abstract

The invention discloses a winding drum material intermittent conversion structure and a control method, and the winding drum material intermittent conversion structure comprises an unwinding 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 device, the two first traction units are controlled to be stopped and started, so that the winding drum material located 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 invention relates to the technical field of printing equipment, and in particular to a roll material pause conversion structure and a control method. Background Art

[0002] With the rapid development of the printing and packaging industry, there are many types of printing, more and more printing manufacturers, and the competition among printers is becoming more and more fierce; and improving precision, improving production efficiency, and reducing production costs are the main magic weapons for businesses to win the competition. At present, the flat-pressing hot stamping or creasing equipment with roll paper as the feeding method has a flat-pressing characteristic (its characteristics are: the upper and lower stamping platforms are periodically opened and closed, and when the two stamping platforms are closed, the roll material must be in a stopped state, otherwise the roll material will be broken) that determines that the roll material must be fed periodically and intermittently in the flat-pressing die-stamping unit. Therefore, in the prior art, a larger floating storage rack is usually configured at the feeding and rewinding of the printing equipment to realize the storage of paper stop conversion. Usually, this storage device passively controls the paper tension, and the tension control is unstable.

[0003] Therefore the prior art still needs to be improved and enhanced. Summary of the invention

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

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A roll material stop conversion structure, comprising:

[0007] Unwinding unit for continuously providing roll material;

[0008] A flat pressing work unit, the flat pressing work unit comprising a fixed platform and a punching platform arranged opposite to the fixed platform, the punching platform being movable relative to the fixed platform to be used for punching the roll material;

[0009] Two first traction units are respectively located on both sides of the flattening working unit;

[0010] Two adjusting units, one of which is located on a web conveying path between the unwinding unit and the first traction unit close to one side of the unwinding unit, and the other of which is located downstream of the first traction unit away from the unwinding unit;

[0011] Two second traction units, one of the second traction units is located on the web conveying path between the unwinding unit and the adjusting unit close to one side of the unwinding unit, and the other second traction unit is located downstream of the other adjusting unit.

[0012] 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.

[0013] The first traction unit includes a first traction roller and a first pressing roller arranged opposite to the first traction roller, the wheel surface of the first pressing roller can be pressed together 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 and the stamping platform is in a stationary state or a moving state.

[0014] The adjusting unit comprises 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.

[0015] The adjusting unit further comprises a floating roller, and the floating roller is located on a web conveying path between the adjusting member and the second traction unit.

[0016] The second traction unit comprises 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.

[0017] 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.

[0018] The second traction roller, the first traction roller and the adjusting member satisfy 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.

[0019] The adjusting unit comprises a driving member and a transmission member connected to the adjusting member, wherein an output end of the driving member is connected to the transmission member so that the transmission member drives the adjusting member to move;

[0020] The driving member is a motor, 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;

[0021] The adjusting unit further comprises a guide member, and the guide member is used for guiding the movement of the adjusting member.

[0022] A control method using the web stop conversion structure as described above comprises:

[0023] The unwinding unit releases the roll material without stopping the machine;

[0024] The second traction unit tractions the web released by the unwinding unit;

[0025] The two first traction units stop working, and the web between the fixed platform and the punching platform is in a stationary state; the punching platform moves close to the fixed platform and punches the web, one of the adjustment units moves away from the first traction unit on the side where it is located, and the other adjustment unit synchronously moves close to the first traction unit on the side where it is located; or, the punching platform moves away from the fixed platform; the two first traction units start, and the web between the fixed platform and the punching platform is in a moving state; one of the adjustment units moves close to the first traction unit on the side where it is located, and the other adjustment unit synchronously moves away from the first traction unit on the side where it is located;

[0026] The second traction unit tractions the web after punching.

[0027] Compared with the prior art, the present invention provides a roll material stop conversion structure and control method, wherein the roll material stop conversion structure includes: an unwinding unit for continuously providing roll material; a flattening working unit, wherein the flattening working unit includes a fixed platform and a stamping platform arranged opposite to the fixed platform, and 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 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. 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; 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 of stamping during the conveying process of the roll material, and ensuring the continuity of the roll material conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a schematic structural diagram of the prior art web stop conversion structure.

[0029] Figure 2 This is a structural schematic diagram of the web stop conversion structure provided by the present invention.

[0030] Figure 3 A schematic diagram of the connection of the transmission member, the adjustment member and the guide member of the web stop conversion structure provided by the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail 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 used to limit the present invention.

[0032] 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 a central component at the same time. 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 a central component at the same time.

[0033] 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.

[0034] With the rapid development of the printing and packaging industry, there are many types of printing, more and more printing manufacturers, and the competition among printers is becoming more and more fierce; and improving precision, improving production efficiency, and reducing production costs are the main magic weapons for businesses to win the competition. At present, the flat-pressing hot stamping or creasing equipment with roll paper as the feeding method has a flat-pressing characteristic (its characteristics are: the upper and lower stamping platforms are periodically opened and closed, and when the two stamping platforms are closed, the roll material must be in a stopped state, otherwise the roll material will be broken) that determines that the roll material must be fed in a periodic intermittent feeding in the flat-pressing die-stamping unit. Therefore, in the prior art, a larger floating storage rack is usually configured at the feeding or winding place of the printing equipment to realize the storage of paper stop conversion. Usually, this storage device passively controls the paper tension, and the tension control is unstable; in addition, the storage mechanism is usually heavy and difficult to achieve high-speed operation.

[0035] In order to solve the above problems, the present invention provides a roll material stop conversion structure, please refer to Figure 2-Figure 3 ,include:

[0036] An unwinding unit 1 is used to continuously provide a roll of material; a flattening working unit 2, wherein the flattening working unit 2 includes a fixed platform 21 and a punching platform 22 arranged opposite to the fixed platform 21, and the punching platform 22 is movable relative to the fixed platform 21 for punching the roll of material; two first traction units are 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 web 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 web and the stamping demand of the flattening working unit 2 for the web; at the same time, the present application uses the synchronous movement of the two adjustment units to store or release the web before and after stamping, thereby adapting to the stop and conversion of stamping during the conveying process of the web, and ensuring the continuity of the web conveying.

[0037] 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.

[0038] In the present application, the color mark electric eye 7 is arranged close to the first traction unit on one 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, and the color mark electric eye 7 is controlled and coordinated with the two first traction units 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 belongs to the 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 do not belong to the content to be protected by this application. The invention point of this application lies in the content of the overall structure and control method steps.

[0039] 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.

[0040] 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 prior art. 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 accurate positioning during the web conveying process, that is, to achieve 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 the adjustment unit 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, which avoids the shaking caused by the dynamic adjustment of the adjustment unit during the horizontal movement, 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 meet different web conveying requirements.

[0041] Furthermore, the adjustment unit includes an adjustment member, and the two adjustment members move synchronously so that the second traction unit continuously pulls the web released by the unwinding unit. The adjustment unit also includes a floating roller, and the floating roller is located on the web conveying path between the adjustment member and the second traction unit. A displacement sensor (not shown in the figure) is provided on the floating roller to feedback the position of the floating roller; when the displacement sensor detects that the position of the floating roller is offset, the floating roller is placed in a suitable position by controlling the speed of the second traction unit conveying the web, thereby controlling the tension of the web to remain stable during conveying.

[0042] In the present application, the two adjustment units include a first adjustment unit 41 (i.e., the aforementioned one 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 adjustment member 411, a first floating roller 412 located between a second traction unit and the first adjustment member 411 and along the web conveying path, and the second adjustment unit 42 includes a second adjustment member 421, a second floating roller 422 located between the second adjustment member 421 and another second traction unit and along the web conveying path.

[0043] 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. The first adjusting member 411 located upstream of the first feeding traction unit 31 between the stamping platform 22 and the fixed platform 21 moves leftward in the horizontal direction, and the horizontal distance between the first adjusting member 411 and the first feeding traction unit 31 increases, and the horizontal distance between the first adjusting member 411 and the first floating roller 412 increases, so that the length of the roll material between the first adjusting member 411 and the first feeding traction unit 31 increases, and the length of the roll material between the first adjusting member 411 and the first floating roller 412 increases, thereby achieving the roll material. 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 the web between the other second traction unit and the second adjusting member 421, the second adjusting member 421 located downstream of the first material discharging traction unit 32 moves leftward in the horizontal direction, and the distance between the second adjusting member 421 and the first material feeding 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; so far, the first adjusting member 411 and the second adjusting member 421 move leftward synchronously and at the same speed. During the process, the web 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 color code electric eye 7 detects the printed positioning mark on the web in real time, repeatedly controls the start and stop of the first feeding traction unit 31 and the first discharging traction unit 32, and at the same time, accompanies the movement steps of the first adjusting member 411 and the second adjusting member 421, thereby realizing the conversion of the stop movement of the web.

[0044] It should be noted that, in the best 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 realize the storage and release of the web; of course, alternatively, the first feed traction unit 31 and the first floating roller 412 and 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 on the right side of the first feed traction roller 31, and the second floating roller 422 is located on the left side of the first discharge traction roller 32. At this time, the first adjusting member 411 and the second adjusting member 421 can move in the vertical direction to realize the adjustment during the web conveying process, and the adaptive modification of the structure is foreseeable and still belongs to the protection scope of the present application; of course, the relative position relationship between the various components can also be adaptively adjusted as long as the technical effect can be achieved, and the specific position between the various components is not limited here.

[0045] The existing web 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. The distance between the floating adjustment roller and the fixed roller in the vertical direction is dynamically adjusted to adapt to the flattening working unit 2 to punch the web, thereby realizing the stop and conversion of the web. The disadvantage of the prior art 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 easy to generate shaking in the process, thereby causing the web to vibrate during the conveying process, affecting the tension control of the web; in the present application, the first adjusting member 411 is located below the first feeding 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 discharging 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 stop and change during the roll material conveying process, which is beneficial to improve the stability of the roll material conveying and reduce the influence 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 stop and change 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 limitation 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 the difficulty is relatively large.In the present application, the first adjusting member 411 and the second adjusting member 421 move 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 web tension 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 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 change 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 in the conveying process to be more stable. The specific principle and the assembly structure of the two belong to the prior art. The position of the first floating roller 412 and the second floating roller 422 of the present application on the web conveying path 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 the present application.

[0046] 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.

[0047] 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 roll material and conveys the roll material through the second feeding traction roller 611, traction the roll material at a constant speed, reduces the tension fluctuation generated after the unwinding unit 1 releases the roll material, and is conducive to ensuring that the roll material enters the subsequent process smoothly after being released from the unwinding unit 1; after the roll material is stamped, it enters the winding or other process under the guidance of the second discharging traction roller 621, which is conducive to the roll material leaving the roll material stop conversion structure in a stable state, ensuring the flatness of the roll material 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 roll material maintains a continuous, stable and controllable state during the conveying process. In addition, the second pressure roller applies pressure to the roll material, and can also adjust the tightness of the roll material, which is conducive to maintaining the flatness and stability of the roll material during the conveying process. 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 together or opened by cylinder drive. The second pressure roller can dynamically control the position relationship with the second traction roller, 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.

[0048] Furthermore, the adjusting unit comprises 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.

[0049] There are two groups of adjustment units in the present application. The two adjustment units can be connected to their respective transmission members through two driving members respectively. The two driving members simultaneously control the transmission members connected to the output ends of the two driving members to work, so that the two transmission members synchronously drive the adjustment members connected to the two transmission members to move, so as to achieve the purpose of the web material stopping and switching. Of course, the two adjustment units in the present application can also use one driving member as the total power to drive the two adjustment members to move. The specific connection structure belongs to the prior art 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 two adjustment members to move can be set according to the actual situation, and will not be described in detail in the present application.

[0050] Furthermore, the driving member is a motor, and the transmission member includes a motor wheel 51, a driven pulley 52, and 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 the present 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 periodic movement of the adjusting member on the synchronous belt; 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, which avoids the vibration of other transmission methods during the transmission process, which affects the tension of the roll material between the fixed platform 21 and the stamping platform 22, thereby causing the problem of poor stamping effect. It should be noted that the present application can also drive the transmission part to move through a screw motor, drive the transmission part to move through a motor and a sprocket, etc. The specific driving part and the transmission part can be matched as long as they can drive the adjusting part to move linearly, and the present application does not limit this.

[0051] Furthermore, the adjusting unit further comprises a guide member 54, and the guide member 54 is used for guiding the movement of the adjusting member.

[0052] The setting direction of the guide member 54 described in the embodiment of the present application is parallel to the web conveying direction 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 table. 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 conversion of the web, the setting direction of the guide member 54 is perpendicular to the web conveying direction between the two first traction units.

[0053] 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. Preferably, 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 have the same length. The web in this application can be a product such as paper or film. For ease of understanding, the right side of the flattening working unit 2 is taken as an example to illustrate the speed relationship during the web conveying process, 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 traction roller 611 and the second discharge traction roller 621; V1: the linear speed of the first feed traction roller 311 and the first discharge traction 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 the opposite direction; T: the time of one movement cycle;

[0054] 1. When the web between the punching platform 22 and the fixed platform 21 is in a stationary state, the punching platform 22 punches the web: V0 is the predetermined linear velocity of the second feeding traction roller 611, V1=0, V2=-1 / 2V0 (the negative sign indicates the direction is to the left, 1 / 2 is because when the first adjusting member 411 moves, the web wraps at an angle of 180°, and the web storage length is twice the movement distance of the first adjusting member 411);

[0055] 2. When the first traction unit normally conveys the 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, V2=(V0-V1) / 2; It should be noted that t2 is the time for the first feed traction roller 311 to convey the web, which accounts for about 2 / 3 of the entire motion cycle, t2=2 / 3T; V0=2V2+V1 The superposition of the conveying speeds of the first feed traction roller 311 and the first adjusting member 411 is equal to the linear velocity of the second traction roller. Therefore, V0=2V2+V1 is satisfied between the second traction roller, the first traction roller and the adjusting member, 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.

[0056] The present application also provides a control method for a web-stop web-stop conversion structure, including:

[0057] The unwinding unit 1 releases the roll material without stopping the machine;

[0058] The second traction unit tractions the web released by the unwinding unit 1;

[0059] The two first traction units stop working, and the web between the fixed platform 21 and the punching platform 22 is in a stationary state; the punching platform 22 moves close to the fixed platform 21 and punches the web, one of the adjustment units moves away from the first traction unit on the side where it is located, and the other adjustment unit synchronously moves close to the first traction unit on the side where it is located; or, the punching platform 22 moves away from the fixed platform 21; the two first traction units are started, and the web between the fixed platform 21 and the punching platform 22 is in a moving state; one of the adjustment units moves close to the first traction unit on the side where it is located, and the other adjustment unit synchronously moves away from the first traction unit on the side where it is located;

[0060] The second traction unit tractions the web after punching.

[0061] Compared with the prior art, 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 conveying and ensuring the accuracy of the stamping position of the stamping platform 22; the two adjustment units move synchronously to coordinate with the start and stop of the two first traction units to adapt to the continuous unwinding of the unwinding unit 1 and the continuous traction and conveying of the roll material by the two second traction units, thereby realizing the stop and conversion of the roll material, ensuring the stability of the tension during the roll material conveying process, and at the same time solving the problem of the large counterweight of the floating storage rack affecting the roll material conveying speed.

[0062] In summary, the present invention provides a roll material stop conversion structure and control method, wherein the roll material stop conversion structure includes: an unwinding unit for continuously providing roll material; a flattening working unit, the flattening working unit includes 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 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 adjustment 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 flat pressing 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 stop and conversion of stamping during the conveying process of the roll material, and ensuring the continuity of the roll material conveying.

[0063] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A web stop conversion structure, characterized in that: include: Unwinding unit for continuously providing roll material; A flat pressing work unit, the flat pressing work unit comprising a fixed platform and a punching platform arranged opposite to the fixed platform, the punching platform being movable relative to the fixed platform to be used for punching the roll material; Two first traction units are respectively located on both sides of the flattening working unit; Two adjusting units, one of which is located on a web conveying path between the unwinding unit and the first traction unit close to one side of the unwinding unit, and the other of which 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 web conveying path between the unwinding unit and the adjusting unit close to one side of the unwinding unit, and the other second traction unit 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, and 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 pressing roller arranged opposite to the first traction roller, the wheel surface of the first pressing roller can be pressed together 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 and the stamping platform is in a stationary state or a moving state.

4. The web stop conversion structure according to claim 3, characterized in that: The adjusting unit comprises 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 comprises a floating roller, and the floating roller is located on a web conveying path between the adjusting member and the second traction unit.

6. The web stop conversion structure according to claim 5, characterized in that: The second traction unit comprises 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 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 conversion structure according to claim 7, characterized in that: The second traction roller, the first traction roller and the adjusting member satisfy 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 conversion structure according to claim 1, characterized in that: The adjusting unit comprises a driving member and a transmission member connected to the adjusting member, wherein an 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, 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 further comprises a guide member, and the guide member is used for guiding the movement of the adjusting member.

10. A control method using the web stop conversion structure according to any one of claims 1 to 9, characterized in that: include: The unwinding unit releases the roll material without stopping the machine; The second traction unit tractions the web released by the unwinding unit; The two first traction units stop working, and the web between the fixed platform and the punching platform is in a stationary state; the punching platform moves close to the fixed platform and punches the web, one of the adjustment units moves away from the first traction unit on the side where it is located, and the other adjustment unit synchronously moves close to the first traction unit on the side where it is located; or, the punching platform moves away from the fixed platform; the two first traction units start, and the web between the fixed platform and the punching platform is in a moving state; one of the adjustment units moves close to the first traction unit on the side where it is located, and the other adjustment unit synchronously moves away from the first traction unit on the side where it is located; The second traction unit tractions the web after punching.

Images