A digital unwinding and rewinding control method for a multi-layer compounding machine

Abstract

A digital unwind and rewind control method for a multi-layer laminator, comprising the following steps: (S1) Classify and define the strip materials on each section of the multi-layer laminator; Define the first base material roll and the path strip material, the second base material roll and the path strip material, the third base material roll and the path strip material, and the rewinding roll and the path strip material respectively, with the pressing point of the composite steel roll as the first endpoint and the starting point on the paper core of the roll as the second endpoint for the strip materials on the film path of the laminator and the rolls; (S2) Determine the length detection and calculation methods for each section of the strip material to obtain the lengths of the strip materials on each path between the rolls and the composite unit on the laminator at the detection moment; (S3) Set calculation or comparison conditions for digital control of the unwind and rewind actions. By detecting and calculating, the diameter data of each roll and the length data of each section of the path strip material at any time are obtained, providing necessary information for digital unwind and rewind control.

Description

Technical Field

[0001] The present invention relates to a solventless laminator, and in particular to a digital unwind and rewind control method for a multi-layer laminator. Background Art

[0002] A solventless laminator is a machine that laminates two or more substrates together using a solventless adhesive. Its main components include: a first unwind unit, a coating unit, a second unwind unit, a lamination unit, and a rewind unit. The lamination of two substrates is completed through unwind - coating - lamination - rewind. For example, a three-in-one solventless laminator with the Chinese patent publication number CN207657339U is provided with a first wall panel, a second wall panel, and a third wall panel in sequence from left to right at the lower end of the machine top. A first unwind device, a first coating device, and a first unwind tension device are provided on the first wall panel. A second unwind device, a second coating device, and a second unwind tension device are provided on the second wall panel. A rewind device, a lamination device, a third unwind device, and a third unwind tension device are provided on the third wall panel. A plurality of film guiding rollers are provided on the first wall panel, the second wall panel, the third wall panel, and the machine top. This three-in-one solventless laminator can complete the solventless lamination process of three layers of materials at one time. Traditional laminators cannot measure and calculate the roll diameter and material length of the unwind and rewind in real time, nor the length of the material tape in the path, so various digital controls of the unwind and rewind devices cannot be carried out, such as automatically and accurately removing the waste during film threading operation, estimating a reasonable rewind diameter, etc.; nor can it achieve the optimal control of the shortest remaining material of valuable material tapes and the digital recording of the joints in the rewind material rolls. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a digital unwind and rewind control method for a multi-layer laminator, which obtains the diameter data of each material roll and the length data of the material tape in each section of the path at any time through detection and calculation, providing necessary information for digital unwind and rewind control.

[0004] To solve the above technical problem, the technical solution of the present invention is: a digital unwind and rewind control method for a multi-layer laminator, the multi-layer laminator includes a plurality of unwind devices, a rewind device, a lamination device, a coating device, and a floating roller device installed in the unwind path, and includes the following steps:

[0005] (S1) Classify and define the material tapes in each section of the path on the multi-layer laminator; the material tapes on the film path of the laminator and on the material rolls are respectively defined as the first base material roll and the path material tape, the second base material roll and the path material tape, the third base material roll and the path material tape, and the rewind material roll and the path material tape, with the pressure point of the composite steel roller as the first end point and the starting point on the paper core of the material roll as the second end point.

[0006] (S2) Determine the detection and calculation methods for the lengths of each section of the strip material, and obtain the lengths of the strip materials on each section of the path from the loading reel to the compounding unit on the compounding machine at the detection moment, the length L1 of the first base material reel and the path strip material, the length L2 of the second base material reel and the path strip material, the length L3 of the third base material reel and the path strip material, and the length LM of the winding reel and the path strip material;

[0007] (S3) Set the calculation or comparison conditions for digitally controlling the unwinding and winding actions.

[0008] As an improvement, the detection and calculation methods for the lengths of each section of the strip material are as follows:

[0009] L1 = L R1 + L XR1 + L K11 + L T11 + L K12 + L T12 + L K13 (1)

[0010] L2 = L R2 + L XR2 + L K21 + L T21 + L K22 + L T22 + L K23 (2)

[0011] L3 = L R3 + L XR3 + L K31 + L T31 + L K32 (3)

[0012] L M = L RM + L XRM + L KM (4)

[0013] Among them: L R1 、L R2 、L R3 、L RM are respectively the lengths of the strip materials contained in the reels of the first base material unwinding, the second base material unwinding, the third base material unwinding, and the compound film winding at the detection moment;

[0014] L XR1 、L XR2 、L XR3 、L XRM are respectively the guiding path strip material lengths of the first base material unwinding, the second base material unwinding, the third base material unwinding, and the compound film winding at the detection moment;

[0015] L T11 、L T21 、LT31 They are respectively the lengths of the strip materials in the first tension floating roller section paths in the unwinding paths of the first base material, the second base material, and the third base material;

[0016] L T12 and L T22 They are respectively the lengths of the strip materials in the second tension floating roller section paths in the unwinding paths of the first base material and the second base material;

[0017] L K11 is the length of the fixed path strip material between the first unwinding fixed guide roller and the first floating roller device in the path of the first base material, and L K12 is the length of the fixed path strip material between the first floating roller device of the first base material and the first coating unit, and L K13 is the length of the fixed path strip material between the second floating roller device of the first base material and the composite unit. The lengths of these three sections of strip materials are constant and are measured by the graphical method;

[0018] L K21 is the length of the fixed path strip material between the second unwinding fixed guide roller of the second base material and the first floating roller device in the path of the second base material, and L K22 is the length of the fixed path strip material between the first floating roller device of the second base material and the second coating unit, and L K23 is the length of the fixed path strip material between the second floating roller device of the second base material and the composite unit. The lengths of these three sections of strip materials are constant and are measured by the graphical method;

[0019] L K31 is the length of the fixed path strip material between the third unwinding fixed guide roller of the third base material and the first floating roller device in the path of the third base material, and L K32 is the length of the fixed path strip material between the first floating roller device of the third base material and the composite unit. The lengths of these two sections of strip materials are constant and are measured by the graphical method.

[0020] L KM is the length of the path strip material from the composite unit to the winding fixed guide roller of the composite film. The length of this section of strip material is constant and is measured by the graphical method.

[0021] As an improvement, the calculation method for the lengths of the strip materials contained in the material rolls during the detection moment for the unwinding of the first base material, the second base material, the third base material, and the winding of the composite film:

[0022] L R1 = π(D R1 2 - d A 2 ) / 4δ F1 (5)

[0023] L R2 = π(D R2 2 - d B 2) / 4δ F2 (6)

[0024] L R3 =π(D R3 2 -d C 2 ) / 4δ F3 (7)

[0025] ……

[0026] L RM =π(D RM 2 -d M 2 ) / 4(Σδ F +Σδ G ) (8)

[0027] Among them, D R1 , D R2 , D R3 , D RM are the diameters of the first base material unwinding coil, the second base material unwinding coil, the third base material unwinding coil, and the winding coil at the start moment of detection, respectively.

[0028] As an improvement, the calculation method for the diameters of the first base material unwinding coil, the second base material unwinding coil, the third base material unwinding coil, and the winding coil at the start moment of detection:

[0029] D R1 =(120 - 2n 12 *△te1)*δ F1 / [120 - (n 11 +n 12 )*△te1] (9)

[0030] D R2 =(120 - 2n 22 *△te2)*δ F2 / [120 - (n 21 +n 22 )*△te2] (10)

[0031] D R3 =(120 - 2n 32 *△te3)*δ F3 / [120 - (n 31 +n 32 )*△te3] (11)

[0032] ……

[0033] D RM =(120 - 2n M2*△tem)*(Σδ F +Σδ G ) / [120-(n M1 +n M2 )*△tem] (12)

[0034] Among them, △te1, △te2, △te3, and △tem are the times for one revolution of the encoders installed on the first unwind motor shaft, the second unwind motor shaft, the third unwind motor shaft, and the winding motor shaft respectively;

[0035] n 11 、n 12 are the motor speed values of the first unwind motor at the beginning and end moments of the △te1 detection time period extracted by the system;

[0036] n 21 、n 22 are the motor speed values of the second unwind motor at the beginning and end moments of the △te2 detection time period extracted by the system;

[0037] n 31 、n 32 are the motor speed values of the third unwind motor at the beginning and end moments of the △te3 detection time period extracted by the system;

[0038] n M1 、n M2 are the motor speed values of the winding motor at the beginning and end moments of the △teM detection time period extracted by the system;

[0039] δ F1 、δ F2 、δ F3 ……Σδ F are the thicknesses of the first substrate, the second substrate, the third substrate, and the multi-layer composite film respectively;

[0040] δ 胶1 、δ 胶2 ……Σδ G are the total thicknesses of the first layer of glue, the second layer of glue, and all the glue layers respectively.

[0041] As an improvement, the calculation method of the guiding path tape length for the first substrate unwind, the second substrate unwind, the third substrate unwind, and the composite film winding:

[0042] L XR1 =[a1 2 -0.25(D R1 -d G ) 2 0.5 +π*d G *{90-θ1-arcsin[(D R1 -d​G ) / 2 * a1]} / 360 (13)

[0043] L XR2 =[a2 2 -0.25(D R2 -d G ) 2 0.5 +π * d G *{90 - θ2 - arcsin[(D R2 -d G ) / 2 * a2]} / 360 (14)

[0044] L XR3 =[a3 2 -0.25(D R3 -d G ) 2 0.5 +π * d G *{90 - θ3 - arcsin[(D R3 -d G ) / 2 * a3]} / 360 (15)

[0045] ……

[0046] L XRM =[a M 2 -0.25(D RM -d G ) 2 0.5 +π * d G *{90 - θ M -arcsin[(D R1 -d G ) / 2 * a M} / 360 (16)

[0047] Wherein, d G is the diameter of the fixed guide roller for unwinding and winding; a1, a2, a3, a M are the center distances between the material roll and the guide roller; θ1, θ2, θ3, θ M are the angles between the connecting line of the centers of the fixed guide roller and the material roll and the horizontal line.

[0048] As an improvement, the calculation method of the length of the material tape in the tension floating roller section path for the first substrate unwinding, the second substrate unwinding, and the third substrate unwinding paths:

[0049] L T11 =L T110 +△ LT11 (17)

[0050] L​​​T21 = L T210 + Δ LT21 (18)

[0051] L T31 = L T310 + Δ LT31 (19)

[0052] L T12 = L T120 + Δ LT12 (20)

[0053] L T22 = L T220 + Δ LT22 (21)

[0054] Wherein, L T110 , L T210 , L T310 are respectively the lengths of the strip materials in the tension floating roller sections when the swing arms of the first floating roller on the first unwinding path, the first floating roller on the second unwinding path, and the first floating roller on the third unwinding path are in the middle position;

[0055] L T120 , L T220 are respectively the lengths of the strip materials in the tension floating roller sections when the swing arms of the second floating roller on the first unwinding path and the second floating roller on the second unwinding path are in the middle position;

[0056] Δ LT11 , Δ LT21 , Δ LT31 are respectively the deviation of the length deviation of the tension floating roller section paths of the first floating roller on the first unwinding path, the first floating roller on the second unwinding path, and the third unwinding path;

[0057] Δ LT12 , Δ LT22 are respectively the deviation of the length deviation of the strip material paths in the tension floating roller sections of the second floating roller on the first unwinding path and the second floating roller on the second unwinding path.

[0058] As an improvement, given the required fixed-length winding film material length L E , the steps of the control method for digital fixed-length winding are as follows:

[0059] 1) Calculate the winding roll diameter at the detection moment according to D RM = (120 - 2n M2 * Δtem) * (Σδ F + Σδ G ) / [120 - (n M1 + n M2 ) * Δtem];

[0060] 2) According to L RM = π(DRM 2 -d M 2 ) / 4(Σδ F +Σδ G )

[0061] Calculate the length of the film material on the rewinding material roll at the detection moment;

[0062] 3) According to △L RM = L E -L RM

[0063] Calculate the length of material that needs to be rewound;

[0064] 4) According to △ TE = 0.001△L RM / V E

[0065] Calculate the time required to reach the rewinding length, where V E is the set running speed of the main machine of the laminator;

[0066] 5) When △ TE < 0.5 minutes, the main machine starts to decelerate, and calculate △N D = △L RM / (πD RM )

[0067] 6) When △N D < 2, the main machine decelerates to 10 m / min, and controls the rewinding length with the absolute value of the encoder. The formula is as follows:

[0068] △N R = △L RM *N E / (πD RM )

[0069] In the above formula, △N R is the number of encoder pulses still required to complete the fixed-length rewinding, N E is the rated number of encoder pulses, and the machine stops when the number of pulses is reached.

[0070] As an improvement, when starting the machine for the first time every day or during daily material change and startup, the control method for automatically and accurately stopping and removing the threading waste is as follows:

[0071] 1) Thread each material roll through its respective coating unit, through the laminating unit, and fix it to the core of the laminated material roll;

[0072] 2) Manually control to lubricate the rollers;

[0073] 3) Automatically start the machine according to the waste rejection length, draw the correctly coated film to the winding reel, and automatically stop the machine after the composite steel roller rotates through the waste rejection length;

[0074] Steps for calculating the waste rejection length:

[0075] 3.1) Select the maximum value among the tape lengths of the paths from the coating steel rollers of each base material to the winding core;

[0076] MAX{L W1 ,L W2 ,……}

[0077] L W1 =L T120 +L K13 +L XRM +L KM

[0078] L W2 =L T220 +L K23 +L XRM +L KM

[0079] ……

[0080] 3.2) The waste rejection length L Wi =100 + MAX{L W1 ,L W2 ,……}。

[0081] 4) Cut off the waste tape on the winding paper core;

[0082] As an improvement, the method steps for recording the information of the tape joint are as follows:

[0083] 1) Set joint position detection instruments at the positions in front of the composite steel rollers on the paths of each base material. The tape path lengths of each joint position from the composite steel roller are: L C1 、L C2 、L C3 ……;

[0084] 2) When receiving the tape joint information, the tape length of the joint from the winding core is: (L RM +L XRM +L KM +L Ci );

[0085] 3) If the winding tape length is L Σ , then taking the tape head on the surface of the reel as the zero position, the position L N of the Nth tape joint is expressed as: L N =L Σ -(L RM +L XRM +LKM +L Ci )。

[0086] The beneficial effects brought by the present invention compared with the prior art are as follows:

[0087] 1. According to the path and the length of the strip in the coil obtained by automatic detection and calculation, various length values for automatically and accurately stopping and removing the waste film during film threading, automatically determining the shortest waste cutting position during coil replacement, and the take-up diameter when the unwind coil is used up during startup are further calculated, providing a basis for the automatic control to achieve the above functions;

[0088] 2. It can also detect the position of the strip joint in the path from the coil by a photoelectric detection instrument, calculate the positions of the intermediate joint and the coil change joint of the unwind coil in the wound strip, and record them in the information of the wound coil, providing necessary information for the next digital device. Brief Description of the Drawings

[0089] Figure 1 It is a schematic diagram of the film running of a three-layer laminator.

[0090] Figure 2 It is a schematic diagram of the floating roller device. Detailed Embodiment

[0091] The present invention will be further described below with reference to the accompanying drawings of the specification.

[0092] A digital unwind and rewind control method for a multi-layer laminator. In this embodiment, a three-layer laminator is taken as an example for illustration. As Figure 1 shown, the laminator includes a first unwind device, a second unwind device, a third unwind device, a rewind device, a coating device, and a lamination device. The first unwind device unwinds the first base material coil 1, and the first unwind device includes a first unwind shaft, a first unwind drive motor, and a first rotary encoder provided at the shaft end of the first unwind drive motor. The second unwind device unwinds the second base material coil 2, and the second unwind device includes a second unwind shaft, a second unwind drive motor, and a second rotary encoder provided at the shaft end of the second unwind drive motor. The third unwind device unwinds the third base material coil 3, and the third unwind device includes a third unwind shaft, a third unwind drive motor, and a third rotary encoder provided at the shaft end of the third unwind drive motor. The rewind device corresponds to the composite film coil 4 of the composite film, and the rewind device includes a rewind shaft, a rewind drive motor, and a rewind rotary encoder provided at the shaft end of the rewind drive motor. The coating device includes a first coating unit 9 for coating the first base material strip and a second coating unit 10 for coating the second base material strip. The lamination device includes a lamination unit 11 for laminating the first base material strip, the second base material strip, and the third base material strip. The lamination unit 11 includes a lamination steel roll and a lamination rubber roll.

[0093] The first unwinding path successively includes a first base material roll 1, a first unwinding fixed roller 5, a first floating roller device 12 of the first unwinding path, a first coating unit 9, a second floating roller device 13 of the first unwinding path, and a composite unit 11 from front to back. The first unwinding path also includes a leading roller 20 and a trailing roller 21 of the first floating roller device 12 of the first unwinding path, and a trailing roller 22 of the second floating roller device 13 of the first unwinding path; The second unwinding path successively includes a second base material roll 2, a second unwinding fixed roller 6, a first floating roller device 14 of the second unwinding path, a second coating unit 10, a second floating roller device 15 of the second unwinding path, and a composite unit 11 from front to back. The second unwinding path also includes a leading roller 24 and a trailing roller 23 of the first floating roller device 14 of the second unwinding path, and a trailing roller 25 of the second floating roller device 15 of the second unwinding path; The third unwinding path successively includes a third base material roll 3, a third unwinding fixed roller 7, a first floating roller device 16 of the third unwinding path, and a composite unit 11 from front to back. The third unwinding path also includes a leading roller 26 and a trailing roller 27 of the first floating roller device 16 of the third unwinding path; The winding path successively includes a composite unit 11, a winding fixed roller 8, and a composite film roll 4 from front to back. The structures of each floating roller device are the same, and each includes a floating roller swing arm 29, a swing roller 28 installed at the lower end of the floating roller swing arm 29, a tension floating roller shaft 30 provided at the upper end of the floating roller swing arm 29, and a digital angular displacement sensor 31 for detecting the angular position of the floating roller shaft. The first unwinding path is provided with a first base material path tape joint detection instrument 17, the second unwinding path is provided with a second base material path tape joint detection instrument 18, and the third unwinding path is provided with a third base material path tape joint detection instrument 19.

[0094] The digital unwinding and winding control method for a multi-layer composite machine includes the following steps:

[0095] (S1) Classify and define the path tapes of each section on the multi-layer composite machine; The path tapes on the film running path and the material rolls of the composite machine are respectively defined as the first base material roll and the path tape, the second base material roll and the path tape, the third base material roll and the path tape, and the winding material roll and the path tape, with the composite steel roller pressing point as the first endpoint and the starting point on the paper core of the material roll as the second endpoint.

[0096] (S2) Determine the detection and calculation methods for the lengths of each section of the tape, and obtain the lengths of each section of the path tape between the material rolls and the composite unit on the composite machine at the detection moment, the length L1 of the first base material roll and the path tape, the length L2 of the second base material roll and the path tape, the length L3 of the third base material roll and the path tape, and the length LM of the winding material roll and the path tape.

[0097] (S3) Set calculation or comparison conditions for digital control of the unwinding and winding actions.

[0098] The detection and calculation methods for the lengths of each section of the tape:

[0099] L1 = LR1 +L XR1 +L K11 +L T11 +L K12 +L T12 +L K13 (1)

[0100] L2 = L R2 +L XR2 +L K21 +L T21 +L K22 +L T22 +L K23 (2)

[0101] L3 = L R3 +L XR3 +L K31 +L T31 +L K32 (3)

[0102] L M = L RM +L XRM +L KM (4)

[0103] Where: L R1 , L R2 , L R3 , L RM are respectively the lengths of the material tapes contained in the material rolls of the first base material unwinding, the second base material unwinding, the third base material unwinding, and the composite film winding at the detection moment;

[0104] L XR1 , L XR2 , L XR3 , L XRM are respectively the lengths of the material tapes of the guiding paths of the first base material unwinding, the second base material unwinding, the third base material unwinding, and the composite film winding at the detection moment. L XR1 is the length of the material tape between the first base material roll 1 and the first unwinding fixed roller 5, L XR2 is the length of the material tape between the second base material roll 2 and the second unwinding fixed roller 6, L XR3 is the length of the material tape between the second base material roll 3 and the third unwinding fixed roller 7, L XRM is the length of the material tape between the composite film roll 4 and the winding fixed roller 8;

[0105] L T11 , L T21 , L T31 are respectively the lengths of the material tapes of the first tension floating roller section paths in the first base material unwinding, the second base material unwinding, and the third base material unwinding paths, L T11For the length of the material tape, L, between the leading roller 20 and the trailing roller 21 of the first floating roller device 12 on the first unwinding path T21 For the length of the material tape, L, between the leading roller 24 and the trailing roller 23 of the first floating roller device 14 on the second unwinding path T31 For the length of the material tape between the leading roller 26 and the trailing roller 27 of the first floating roller device 16 on the third unwinding path;

[0106] L T12 、L T22 Are respectively the lengths of the material tapes in the second tension floating roller section paths in the paths of the first base material unwinding and the second base material unwinding, L T12 For the length of the material tape, L, between the first coating unit 9 and the trailing roller 22 of the second floating roller device 13 on the first unwinding path T22 For the length of the material tape between the second coating unit 10 and the trailing roller 25 of the second floating roller device 15 on the second unwinding path;

[0107] L K11 For the length of the material tape in the fixed path between the first fixed unwinding roller 5 and the leading roller 20 of the first floating roller device 12 on the first base material path, L K12 For the length of the material tape in the fixed path between the trailing roller 21 of the first floating roller device of the first base material and the first coating unit 9, L K13 For the length of the material tape in the fixed path between the trailing roller 22 of the second floating roller device 13 of the first base material and the compounding unit 11. The lengths of these three sections of material tapes are constant and are measured by the graphical method;

[0108] L K21 For the length of the material tape in the fixed path between the second fixed unwinding roller 6 of the second base material and the leading roller 24 of the first floating roller device 14 on the second base material path, L K22 For the length of the material tape in the fixed path between the trailing roller 23 of the first floating roller device 14 of the second base material and the second coating unit 10, L K23 For the length of the material tape in the fixed path between the trailing roller 25 of the second floating roller device 15 of the second base material and the compounding unit 11. The lengths of these three sections of material tapes are constant and are measured by the graphical method;

[0109] L K31 For the length of the material tape in the fixed path between the third fixed unwinding roller 7 of the third base material and the leading roller 26 of the first floating roller device 16 on the third base material path, L K32 For the length of the material tape in the fixed path between the trailing roller 27 of the first floating roller device 16 of the third base material and the compounding unit 11. The lengths of these two sections of material tapes are constant and are measured by the graphical method.

[0110] L KM For the length of the material tape in the path between the compound film from the compounding unit 11 to the winding fixed roller 8. The length of this section of material tape is constant and is measured by the graphical method.

[0111] Calculation method for the length of the material tape contained in the material rolls during the inspection moment for the unrolling of the first base material, the unrolling of the second base material, the unrolling of the third base material, and the winding of the composite film:

[0112] L R1 = π(D R1 2 - d A 2 ) / 4δ F1 (5)

[0113] L R2 = π(D R2 2 - d B 2 ) / 4δ F2 (6)

[0114] L R3 = π(D R3 2 - d C 2 ) / 4δ F3 (7)

[0115] L RM = π(D RM 2 - d M 2 ) / 4(Σδ F + Σδ G ) (8)

[0116] Among them, D R1 , D R2 , D R3 , D RM are respectively the diameters of the unrolling material roll of the first base material, the unrolling material roll of the second base material, the unrolling material roll of the third base material, and the winding material roll at the start of the inspection.

[0117] Calculation method for the diameters of the unrolling material roll of the first base material, the unrolling material roll of the second base material, the unrolling material roll of the third base material, and the winding material roll at the start of the inspection:

[0118] D R1 = (120 - 2n 12 * △te1) * δ F1 / [120 - (n 11 + n 12 ) * △te1] (9)

[0119] D R2 = (120 - 2n 22 * △te2) * δ F2 / [120 - (n 21 + n 22)*△te2] (10)

[0120] D R3 =(120 - 2n 32 *△te3)*δ F3 / [120 - (n 31 + n 32 )*△te3] (11)

[0121] ……

[0122] D RM =(120 - 2n M2 *△tem)*(Σδ F + Σδ G ) / [120 - (n M1 + n M2 )*△tem] (12)

[0123] where △te1, △te2, △te3 and △tem are the times for one revolution of the encoders installed on the first unwind motor shaft, the second unwind motor shaft, the third unwind motor shaft and the rewinding motor shaft respectively;

[0124] n 11 , n 12 are the motor speed values of the first unwind motor at the beginning and end of the △te1 detection time period extracted by the system;

[0125] n 21 , n 22 are the motor speed values of the second unwind motor at the beginning and end of the △te2 detection time period extracted by the system;

[0126] n 31 , n 32 are the motor speed values of the third unwind motor at the beginning and end of the △te3 detection time period extracted by the system;

[0127] n M1 , n M2 are the motor speed values of the rewinding motor at the beginning and end of the △teM detection time period extracted by the system;

[0128] δ F1 , δ F2 , δ F3 ……Σδ F are the thicknesses of the first substrate, the second substrate, the third substrate and the multi-layer composite film respectively;

[0129] δ 胶1 , δ 胶2 ……Σδ G are the thicknesses of the first layer of glue, the second layer of glue and the total thickness of all glue layers respectively.

[0130] Calculation method for the length of the guiding path strip of the first base material unwind, the second base material unwind, the third base material unwind and the composite film rewind:

[0131] L XR1 =[a1 2 -0.25(D R1 -d G ) 2 0.5 +π*d G *{90 - θ1 - arcsin[(D R1 -d G ) / 2 * a1]} / 360 (13)

[0132] L XR2 =[a2 2 -0.25(D R2 -d G ) 2 0.5 +π*d G *{90 - θ2 - arcsin[(D R2 -d G ) / 2 * a2]} / 360 (14)

[0133] L XR3 =[a3 2 -0.25(D R3 -d G ) 2 0.5 +π*d G *{90 - θ3 - arcsin[(D R3 -d G ) / 2 * a3]} / 360 (15)

[0134] ……

[0135] L XRM =[a M 2 -0.25(D RM -d G ) 2 0.5 +π*d G *{90 - θ M -arcsin[(D R1 -d G ) / 2 * a M} / 360 (16)

[0136] Among them, d G is the diameter of the fixed guide roller for unwinding and rewinding; a1, a2, a3, a M ​​​​is the center distance between the material roll and the guide roller; θ1, θ2, θ3, θ M are the angles between the connecting line of the centers of the fixed guide roller and the material roll and the horizontal line.

[0137] Calculation methods for the path tape lengths of each tension floating roller section in the first substrate unwinding, second substrate unwinding, and third substrate unwinding paths:

[0138] L T11 = L T110 + △ LT11 (17)

[0139] L T21 = L T210 + △ LT21 (18)

[0140] L T31 = L T310 + △ LT31 (19)

[0141] L T12 = L T120 + △ LT12 (20)

[0142] L T22 = L T220 + △ LT22 (21)

[0143] Among them, L T110 , L T210 , L T310 are the path tape lengths of each tension floating roller section when the swing arms of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the first floating roller in the third unwinding path are in the middle position;

[0144] L T120 , L T220 are the path tape lengths of each tension floating roller section when the swing arms of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path are in the middle position;

[0145] △ LT11 , △ LT21 , △ LT31 are the deflection deviations of the path lengths of the tension floating roller sections of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the third floating roller in the third unwinding path respectively;

[0146] △ LT12 , △ LT22 are the deflection deviations of the tape path lengths of the tension floating roller sections of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path respectively.

[0147] According to the above detection and calculation methods for the tape lengths of each section, given the required fixed-length winding film material length LE , the control method for digital fixed-length winding is as follows:

[0148] 1) Calculate the winding diameter at the detection moment according to D RM =(120 - 2n M2 *△tem)*(Σδ F +Σδ G ) / [120 - (n M1 +n M2 )*△tem];

[0149] 2) Calculate the length of the film material on the winding reel at the detection moment according to L RM =π(D RM 2 -d M 2 ) / 4(Σδ F +Σδ G );

[0150] Calculate the length of the material that needs to be wound continuously;

[0151] 3) Calculate the length of the material that needs to be wound continuously according to △L RM =L E -L RM

[0152] ;

[0153] 4) Calculate the time required to reach the winding length according to △ TE =0.001△L RM / V E

[0154] , where V E is the running speed of the main machine set by the laminator;

[0155] 5) When △ TE <0.5 minutes, the main machine starts to decelerate, and calculate △N D =△L RM / (πD RM );

[0156] 6) When △N D <2, the main machine decelerates to 10 m / min, and controls the winding length with the absolute value of the encoder. The formula is as follows: △N R =△L RM *N E / (πD RM );

[0157] In the above formula, △N R is the number of encoder pulses required to complete the fixed-length winding, N E is the rated number of encoder pulses, and the machine stops when the number of pulses is reached.

[0158] According to the above-mentioned methods for detecting and calculating the length of each section of the strip material, when starting the machine for the first time every day or during daily material change and startup, the control method for automatically and accurately stopping the machine to remove the waste film during film threading is as follows:

[0159] 1) Thread each material roll through its respective coating unit, lead it through the compounding unit, and fix it to the compound material roll paper core;

[0160] 2) Manually control to lubricate the rollers;

[0161] 3) Automatically start the machine according to the waste removal length, pull the correctly coated strip material onto the winding material roll, and control the compound steel roller to automatically stop after rotating through the waste removal length;

[0162] 4) Cut off the waste strip material on the winding paper core;

[0163] Steps for calculating the waste removal length:

[0164] 3.1) Select the maximum value among the strip material lengths of the paths from the coating steel rollers of each base material to the winding core; MAX{L W1 ,L W2 ,……}

[0165] L W1 =L T120 +L K13 +L XRM +L KM

[0166] L W2 =L T220 +L K23 +L XRM +L KM

[0167] ……

[0168] 3.2) The waste removal length L Wi =100+MAX{L W1 ,L W2 ,……}。

[0169] According to the above-mentioned methods for detecting and calculating the length of each section of the strip material, the method steps for recording the information of the strip material joints are as follows:

[0170] 1) Set joint position detection instruments at the positions in front of the compound steel rollers on the paths of each base material. The strip material path lengths of each joint position from the compound steel roller are: L C1 、L C2 、L C3 ……;

[0171] 2) When receiving the strip material joint information, the strip material length from the joint to the winding core is: (L RM +L XRM +LKM +L Ci );

[0172] 3) If the winding material length is L Σ , then taking the leading end of the material on the surface of the coil as the zero position, the position L of the Nth tape joint N is expressed as: L N = L Σ -(L RM +L XRM +L KM +L Ci ).

Claims

1. A digital unwind and rewind control method for a multi-layer laminating machine, the multi-layer laminating machine comprising a plurality of unwind devices, rewind devices, laminating devices, coating devices, and floating roller devices installed on the unwind path, characterized in that: Including the following steps: (S1) Classify and define the path tapes of each section on the multi-layer laminator; define the first base material roll and path tape, the second base material roll and path tape, the third base material roll and path tape, and the winding roll and path tape respectively with the pressure point of the composite steel roll as the first endpoint and the starting point on the core of the material roll as the second endpoint for the film path of the laminator and the tapes on the material rolls; (S2) Determine the detection and calculation methods for the lengths of each section of tape; (S3) Set the calculation or comparison conditions for digitally controlling the unwind and rewind operations, specifically including the following steps: (S31) The length L of the film material to be wound up with a fixed length is known E , and the steps of the digital fixed-length winding control method are as follows: (S311) Calculate the coiling diameter at the detection moment according to D RM =(120 - 2n M2 *△tem)*(Σδ F +Σδ G ) / [120 - (n M1 +n M2 )*△tem] In the above formula: D RM is the diameter of the winding material roll at the detection moment; n M1 、n M2 are the motor speed values of the rewinding motor extracted by the system at the beginning and end moments of the △tem detection time period; △tem is the time for the encoder installed on the shaft of the winding motor to rotate one week at the detection moment; Σδ F is the thickness of the multilayer composite film; Σδ G is the total thickness of all adhesive layers; (S312) According to L RM = π(D RM 2 - d M 2 ) / 4 (Σδ F + Σδ G ) to calculate the film length on the rewinding coil at the detection moment; In the above formula: L RM is the length of the film material on the take-up reel at the detection moment; d M is the core diameter of the rewound material roll; (S313) Calculate the length that needs to continue receiving materials according to △L RM = L E - L RM ​ In the above formula: L E is the set fixed-length winding film material length; △L RM is the length of the film material that needs to be further wound to reach the set winding film material length at the detection time; (S314) Calculate the time required to reach the winding length according to △ TE = 0.001△L RM / V E In the above formula: △ TE The machine running time required to continue winding the film material to reach the set winding film material length at the detection time; V E The main machine running speed set for the duplicating machine; (S315) When △ TE < 0.5 minutes, the main engine starts to decelerate and △N is calculated D = △L RM / (πD RM ) In the above formula: △N D It is the ratio of the length of the film material that needs to continue to receive material to the circumference of the material roll; (S316) When △N D < 2, the host decelerates to reach 10 m / min, and the encoder absolute value is used to control the material receiving length. The formula is as follows: △N R = △L RM * N E / (πD RM ) In the above formula, △N R is the number of encoder pulses still required to complete the constant-length winding, and N E is the rated number of encoder pulses, and the machine stops when this number of pulses is reached; (S32) When starting up for the first time every day or when changing materials during normal operation, the control method for automatically and accurately stopping to remove the waste film during threading is as follows: (S321) Thread each material roll through its respective coating unit, lead it through the composite unit to the composite material roll core and fix it; (S322) Manually control the roller to be lubricated; (S323) Automatically start up according to the waste removal length, pull the correctly coated film onto the winding roll, and automatically stop after the composite steel roll has rotated through the waste removal length; Steps for calculating the waste removal length: (S3231) Select the maximum value of the path tape lengths from the coating steel roll of each base material to the winding roll core; MAX{L W1 ,L W2 ,……} L W1 = L T120 + L K13 + L XRM + L KM L W2 = L T220 + L K23 + L XRM + L KM …… In the above formula: L W1 、L W2 ... are the lengths of the substrate tape from the respective coating steel rollers to the winding cores of the first substrate unwind reel, the second substrate unwind reel... L T120 and L T220 are the path lengths of the material tapes of each tension floating roller section when the swing arms of the second floating roller of the first unwinding path and the second floating roller of the second unwinding path are in the middle position, respectively. L K13 is the length of the strip in the fixed path from the second floating roller device of the first base material to the composite unit, L K23 is the length of the strip in the fixed path from the second floating roller device of the second base material to the composite unit; L XRM is the length of the strip for the guiding path of the composite film winding; L KM is the path strip length of the composite film from the composite unit to the winding fixed guide roller; (S3232) Scrap length L Wi = 100 + MAX{L W1 , L W2 , ……}; In the above formula: L Wi is the length of the waste material to be removed; MAX{L W1 ,L W2 ,……} is the maximum value of the lengths of the calculated waste materials; (S324) Cut off the waste tape on the winding core; (S33) The method steps for recording the joint information of the material roll are as follows: (S331) A joint position detection instrument is set at the position in front of the composite steel roller on each base material path, and the length of the material belt path of each joint position from the composite steel roller is: L C1 、L C2 、L C3 ……; (S332) When the tape joint information is received, the length of the tape of the joint in each unwind film from the winding core is: (L RM + L XRM + L KM + L Ci ); (S333) If the winding material length is L Σ , then taking the material head on the surface of the material roll as the zero position, the position L N of the Nth material tape joint is expressed as: L N = L Σ - (L RM + L XRM + L KM + L Ci ).

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