PET (Polyethylene Terephthalate) film material coating and compounding process

Abstract

The invention relates to the technical field of coating, in particular to a PET (Polyethylene Terephthalate) film material coating and compounding process which comprises the following steps: A, unwinding a base film and pulling the base film to move; b, carrying out dust removal and static electricity removal treatment on the base film; c, coating the base film through a plurality of small rollers; d, the coated base film is subjected to UV treatment, so that the coating is cured on the surface of the base film; e, unwinding two layers of protective films, and respectively adhering the two layers of protective films to two surfaces of the base film to form a composite film; and F, rolling the composite film. Through the arrangement of the multiple small rollers, the multiple small rollers continuously coat the base film for multiple times so as to ensure stable coating adhesion, and the multiple small rollers can also reduce the pressure on the base film, so that the phenomenon of deformation of the composite film is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coating, in particular to a PET film material coating composite process. Background Art

[0002] PET film coating is a process of coating a PET base film with high softness. Usually after coating, the base film needs to be cured and a protective film needs to be attached to ensure that the base film and the coating do not deform.

[0003] In the prior art, since the composite film is relatively soft, the coating attached to the surface of the base film is easy to fall off during the traditional two-roller clamp coating method of the composite film, which not only affects the coating effect and quality, but also easily causes the base film to deform due to high pressure.

[0004] Invention Technology

[0005] In order to solve the above technical problems, the present invention provides a PET film coating composite process, which can improve the stability of coating adhesion and reduce the deformation of the base film.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a PET film coating and compounding process, comprising the following steps:

[0008] A. Unwind the base film and pull the base film to move;

[0009] B. Remove dust and static electricity from the base film;

[0010] C. coating the base film through multiple small rollers;

[0011] D. UV treatment of the coated base film to cure the coating on the surface of the base film;

[0012] E. Unwinding the two layers of protective film, and then laminating the two layers of protective film to the two surfaces of the base film respectively to form a composite film;

[0013] F. Roll up the composite film.

[0014] Furthermore, a unwinding machine is provided, which has a static electricity removal mechanism. The static electricity removal module includes a flipping piece, a first static electricity removal roller, a second static electricity removal roller, a flipping control piece, a limit piece and a limit control piece. The limit piece has a limit slope. One end of the flipping piece is rotatably arranged on the unwinding machine. The first static electricity removal roller is installed on the flipping piece. The other end of the flipping piece contacts the limit slope. The flipping control piece drives the other end of the flipping piece. The limit control piece is used to drive the limit piece to move to change the position where the limit slope contacts the flipping piece. There is a static electricity removal gap between the first static electricity removal roller and the second static electricity removal roller.

[0015] Furthermore, the static electricity removal mechanism further includes a static electricity sensor; the static electricity removal action in step B specifically includes:

[0016] B1. Conduct electrostatic detection on the base film after dust removal through an electrostatic sensor;

[0017] B2. According to the electrostatic detection results, determine whether the electrostatic content of the base film meets the requirements. If so, execute step B3, otherwise execute step B4;

[0018] B3. The flip control member controls the flip member to lift up, so as to drive the first anti-static roller away from the second anti-static roller;

[0019] B4. The flip control member controls the flip member to descend until the flip member contacts the limit inclined surface, and the first anti-static roller and the second anti-static roller contact the two sides of the base film respectively to eliminate static electricity.

[0020] Further, a coating mechanism for performing step C is provided, the coating mechanism comprising a guide roller, a feeding module, a pressure roller and a plurality of small rollers, the plurality of small rollers are rotatably arranged on the feeding module, the guide roller is located on one side of the pressure roller, and the pressure roller is located directly above the plurality of small rollers; step C specifically comprises:

[0021] C1. The base film is guided to move between the pressure roller and the small roller by the guide roller;

[0022] C2. The pressure roller presses the base film to the direction of the small roller and drives the base film to move;

[0023] C3. The coating is picked up in the feeding module through a small roller and applied to the base film.

[0024] Furthermore, the coating mechanism also includes a feeding lifting module, which is used to drive the feeding module to rise and fall relative to the pressure roller; the feeding module has an arc groove, the shape of the arc groove is adapted to the shape of the pressure roller, and multiple small rollers are arranged in sequence along the path of the arc groove.

[0025] Specifically, step C1 specifically includes:

[0026] C11. Obtain the thickness of the base film;

[0027] C12. Adjust the distance between the guide roller and the pressure roller according to the thickness of the base film;

[0028] C13. Sense the real-time tension of the basement membrane;

[0029] C14. According to the real-time tension of the base film, the guide roller is controlled to translate so that the guide roller is close to or away from the pressure roller;

[0030] Among them, the guide roller is located on one side of the pressure roller.

[0031] Further, step D specifically includes:

[0032] D1. Curing the coated base film once with a low-pressure UV lamp;

[0033] D2. Curing the base film after the first curing twice with a medium-pressure UV lamp;

[0034] Among them, step D1 and step D2 are executed in the same space by the same curing machine; when executing step D1 and D2, sense the real-time temperature in the curing machine, and adjust the working rates of the air blowing module and the exhaust module according to the real-time temperature.

[0035] Even further, before step D1, it further includes:

[0036] Obtain the surface image of the coated base film and the current brightness around the base film;

[0037] Perform brightness processing on the surface image according to the current brightness around the base film;

[0038] Analyze the surface head image after brightness processing to obtain the curing state of the coating;

[0039] According to the curing state of the coating, control the lifting of the low-pressure UV lamp and the medium-pressure UV lamp to adjust the distances between the low-pressure UV lamp, the medium-pressure UV lamp and the base film respectively.

[0040] Further, a film feeding mechanism for executing step E is provided, and the number of film feeding mechanisms is two; the film feeding mechanism includes a film feeding module, a clamping module, a film feeding driving part, a film feeding tension detector, a film feeding part and a film feeding tension roller. The film feeding module is used for assembling the material roll of the protective film, the clamping module is used for positioning the material roll to the film feeding module, the film feeding tension detector is used for detecting the tension of the protective film of the base film, one end of the film feeding part is rotatably installed on the film feeding mechanism, the film feeding tension roller is installed at the other end of the film feeding part, and the film feeding driving part is used for driving the film feeding part to rotate;

[0041] The action steps of the film feeding mechanism specifically include:

[0042] Y1. Release the protective film through the film feeding module;

[0043] Y2. During the process of releasing the protective film, detect the current tension F of the protective film through the film feeding tension detector;

[0044] Y3. Provide a preset tension F0, and calculate the tension difference F' according to F' = F - F0;

[0045] Y4. Take the absolute value of the tension difference F', and judge whether |F'| is within the preset range. If so, execute step Y5, otherwise execute step Y6;

[0046] Y5. According to S = k * F ', the length S of the rotation path of the film release member is calculated, and the film release member is driven to rotate according to S by the film release drive member;

[0047] Y6. The film placing drive does not drive the film placing part to rotate;

[0048] Among them, when S>0, the film placing part rotates counterclockwise; when S<0, the film placing part rotates smoothly.

[0049] Furthermore, a laminating mechanism for executing step E is provided, the laminating mechanism comprising a laminating body, a laminating guide roller, a laminating lifting module, a first laminating roller, a second laminating roller, a laminating flipping member, a laminating control block and a laminating translation module, the laminating lifting module is used to drive the laminating guide roller to rise and fall, a laminating gap is provided between the first laminating roller and the second laminating roller for laminating the protective film and the base film, the first laminating roller is mounted on the laminating flipping member, one end of the laminating flipping member is rotatably mounted on the laminating body, the other end of the laminating flipping member is provided with a contact wheel, a laminating inclined surface is provided on the top of the laminating control block, the contact wheel contacts the laminating inclined surface, and the laminating translation module is used to drive the laminating control block to move back and forth in a horizontal direction.

[0050] Beneficial effects of the present invention: The present invention uses multiple small rollers to continuously coat the base film multiple times to ensure stable adhesion of the coating. The multiple small rollers can also reduce the pressure on the base film, thereby reducing the deformation of the composite film. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a process flow chart of the present invention.

[0052] Figure 2 The figure is a schematic diagram of a system to which the present invention is applied.

[0053] Figure 3 It is a schematic diagram of the unwinding machine of the present invention.

[0054] Figure 4 It is a schematic diagram of the coating mechanism of the present invention.

[0055] Figure 5 It is a schematic diagram of a curing machine of the present invention.

[0056] Figure 6 It is a schematic diagram of the film placing mechanism of the present invention.

[0057] Figure 7 It is a schematic diagram of the laminating mechanism of the present invention.

[0058] Figure 8 for Figure 7 Enlarged view of point A.

[0059] Figure numerals: 1-unwinding machine, 2-coating mechanism, 3-curing machine, 4-film unwinding mechanism, 5-laminating mechanism, 6-winding machine, 7-base film, 8-protective film, 10-dust removal mechanism, 11-static removal module, 12-turning member, 13-first static removal roller, 14-second static removal roller, 15-turning control member, 16-limiting member, 17-limiting control member, 18-static sensor, 19-correction module, 21-guide roller, 22-feeding module, 23-pressure roller, 24-small roller, 25-feeding lifting module, 26-arc groove, 28-guide translation module, 29-tension detection device, 30-curing body, 31-low-pressure UV lamp, 32-medium-pressure UV Lamp, 33—temperature detector, 34—blowing module, 35—exhaust module, 36—brightness detector, 37—curing lifting module, 41—film placing module, 42—holding module, 43—film placing driving member, 44—film placing tension detector, 45—film placing member, 46—film placing tension roller, 51—bonding body, 52—bonding guide roller, 53—bonding lifting module, 54—first bonding roller, 55—second bonding roller, 56—bonding flipping member, 57—bonding control block, 58—bonding translation module, 141—flipping contact wheel, 421—holding swing member, 422—holding cylinder, 423—locking block, 424—card slot, 561—contact wheel, 571—bonding inclined surface. DETAILED DESCRIPTION

[0060] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0061] like Figures 1 to 8 As shown, the present invention provides a PET film coating and compounding process, comprising the following steps:

[0062] A. unwinding the base film 7 and pulling the base film 7 to move;

[0063] B. performing dust removal and static removal treatment on the base film 7;

[0064] C. coating the base film 7 by a plurality of small rollers 24;

[0065] D. UV treatment is performed on the coated base film 7 to cure the coating on the surface of the base film 7;

[0066] E. Unwinding the two layers of protective film 8, and then laminating the two layers of protective film 8 to the two surfaces of the base film 7 respectively to form a composite film;

[0067] F. Winding up the composite film, specifically by means of a winder 6 .

[0068] Compared with the prior art, the present invention adopts multiple small rollers 24 as coating rollers, and utilizes multiple small rollers 24 to sequentially coat the base film 7 with coating, thereby reducing the force applied by the small rollers 24 to the base film 7 during a single coating to prevent deformation of the base film 7, and ensuring the adhesion of the coating through multiple continuous coatings, thereby ensuring the coating effect.

[0069] In actual use, this embodiment provides a system for executing the present invention, which includes an unwinding machine 1, a coating mechanism 2, a curing machine 3, a film unwinding mechanism 4, a laminating mechanism 5 and a winding machine 6 which are arranged in sequence.

[0070] The unwinding machine 1 has a tension control module, a dust removal mechanism 10, a static electricity removal mechanism 11 and a deviation correction module 19, that is, after the unwinding machine 1 releases the base film 7, the tension control module senses and adjusts the tension of the base film 7; the dust removal mechanism 10 first removes dust from the surface of the base film 7 to ensure the cleanliness of the base film 7, and then the deviation correction mechanism detects and corrects the position of the base film 7 to prevent the base film 7 from shifting and affecting the coating effect; and the static electricity removal mechanism 11 contacts the surface of the base film 7 to neutralize the static electricity on the surface of the base film 7. After the above pretreatment of the base film 7, the surface of the base film 7 can be guaranteed to be clean and the static electricity will not be too much, which ensures the reliable adhesion of the coating and the safety of the coating.

[0071] Specifically, the anti-static module 11 includes a flip member 12, a first anti-static roller 13, a second anti-static roller 14, a flip control member 15, a limit member 16 and a limit control member 17. The limit member 16 has a limit slope. One end of the flip member 12 is rotatably set on the unwinding machine 1. The first anti-static roller 13 is installed on the flip member 12. The other end of the flip member 12 contacts the limit slope. The flip control member 15 drives the other end of the flip member 12. The limit control member 17 is used to drive the limit member 16 to move to change the position where the limit slope contacts the flip member 12. There is a anti-static gap between the first anti-static roller 13 and the second anti-static roller 14.

[0072] Specifically, the materials of the first anti-static roller 13 and the second anti-static roller 14 are both conventional materials that can neutralize static electricity, and the two are used to respectively contact the upper and lower surfaces of the base film 7 to achieve the anti-static effect on the base film 7. Before the anti-static module 11 works, it needs to be debugged first, that is, first obtain the specific thickness of the base film 7, and then according to the specific thickness of the base film 7, control the limit member 16 to move back and forth through the limit control member 17 to adjust the contact position between the limit slope and the flip member 12, and then use the flip control member 15 to control the other end of the flip member 12 to drop to the lowest position, that is, the other end of the flip member 12 contacts the limit slope, so that the depth of the anti-static gap between the first anti-static roller 13 and the second anti-static roller 14 is the thickness of the base film 7, ensuring that the base film 7 can contact the first anti-static roller 13 and the second anti-static roller 14 when passing through the anti-static gap, so as to achieve the anti-static effect.

[0073] In addition to removing static electricity, the first and second anti-static rollers 13 and 14 are also used to press the base film 7. That is, when there is a thicker part of the base film 7, this part of the base film 7 will be squeezed and reduced when passing through the anti-static gap, thereby ensuring that the thickness of the base film 7 meets the requirements.

[0074] In actual application, the flip control member 15 is preferably a cylinder, and a flip resistance wheel 141 is provided at the bottom of the other end of the flip member 12. The flip resistance wheel 141 is used to resist the limiting slope to reduce the rigid collision between the two; the limiting control member 17 is preferably composed of a screw and a limiting member 16 screwed together, and the screw can be connected to a handle or a motor.

[0075] When the screw is connected to the motor, the effect of real-time control of static electricity removal can be achieved, that is, the static electricity removal mechanism 11 also includes a static electricity sensor 18; the static electricity removal action in step B specifically includes:

[0076] B1. Electrostatic detection of the base film 7 after dust removal by an electrostatic sensor 18;

[0077] B2. According to the electrostatic detection results, determine whether the electrostatic content of the base film 7 meets the requirements, if so, execute step B3, otherwise execute step B4;

[0078] B3. The flip control member 15 controls the flip member 12 to lift up, so as to drive the first anti-static roller 13 away from the second anti-static roller 14;

[0079] B4. The flip control member 15 controls the flip member 12 to descend until the flip member 12 contacts the limit inclined surface, and the first anti-static roller 13 and the second anti-static roller 14 contact the two sides of the base film 7 respectively to eliminate static electricity.

[0080] That is, in this state, after the base film 7 is dusted by the dust removal mechanism 10, which is preferably an ultrasonic dust collector, the static electricity on the surface of the base film 7 will mostly not exceed the threshold value, and only in a few cases will there be too much static electricity. In this state, it is necessary to introduce an electrostatic sensor 18 to constantly sense the static electricity content of the base film 7 passing through. If the static electricity content of the base film 7 is within the preset value, the flip control member 15 will control the flip member 12 to rise, so that the first static electricity removal roller 13 and the second static electricity removal roller 14 are separated from each other to deepen the static electricity removal gap, so that the base film 7 is not contacted by at least one static electricity removal roller, and can pass without static electricity removal; and when the static electricity of the base film 7 is high, or the thickness of the base film 7 is too large, the flip control member 15 controls the flip member 12 to descend to contact with the limit member 16, so that the base film 7 passing through must contact the first static electricity removal roller 13 and the second static electricity removal roller 14 to achieve the static electricity removal / shaping effect.

[0081] The above method ensures that the base film 7 will not be constantly squeezed out by the first anti-static roller 13 and the second anti-static roller 14, thereby reducing the occurrence of the base film 7 being pressed and broken, and ensuring that the present invention can be smoothly implemented.

[0082] The coating mechanism 2 is used to perform step C. The coating mechanism 2 specifically includes a guide roller 21, a feeding module 22, a pressure roller 23 and a plurality of small rollers 24. The plurality of small rollers 24 are rotatably arranged on the feeding module 22. The guide roller 21 is located on one side of the pressure roller 23, and the pressure roller 23 is located directly above the plurality of small rollers 24. Step C specifically includes:

[0083] C1. The base film 7 is guided by the guide roller 21 to move between the pressure roller 23 and the small roller 24;

[0084] C2. The base film 7 is pressed by the pressure roller 23 to the direction of the small roller 24 and drives the base film 7 to move;

[0085] C3. The small roller 24 is used to pick up the coating in the feeding module 22 and apply the coating to the base film 7.

[0086] Compared with the prior art in which the pressure roller 23 and the coating roller are arranged one-to-one, the present invention adopts a plurality of small rollers 24 as coating rollers, and each small roller 24 is stained with the coating of the feeding module 22 and then rotates, so as to stain the coating on the base film 7 passing between the pressure roller 23 and the lower roller, that is, the base film 7 needs to be coated by a plurality of small rollers 24. Since the base film 7 will contact the pressure roller 23 and the small roller 24 each time coating, the pressure applied by the small roller 24 to the base film 7 is not large, ensuring that the soft base film 7 will not be deformed due to the large force; and multiple coatings can also ensure that the coating is more reliably attached to the base film 7, ensuring that the coating thickness on the surface of the base film 7 meets the requirements.

[0087] Specifically, the coating mechanism 2 also includes a feeding lifting module 25, which is used to drive the feeding module 22 to rise and fall relative to the pressure roller 23; the feeding module 22 has an arc groove 26, the shape of the arc groove 26 is adapted to the shape of the pressure roller 23, and a plurality of small rollers 24 are arranged in sequence along the path of the arc groove 26.

[0088] That is, a plurality of small rollers 24 are arranged along an arc track, and the arc track is adapted to the shape of the pressure roller 23, so as to ensure that the base film 7 moves along the arc track under the pressure and limit of the pressure roller 23, thereby ensuring the coating effect. The arrangement of the feeding lifting module 25 realizes the effect of the distance between the pressure roller 23 and the feeding module 22, and the depth of the coating gap can be quickly adjusted according to the thickness of the base film 7, so as to improve the flexibility of the present invention.

[0089] Specifically, step C1 specifically includes:

[0090] C11. Obtaining the thickness of the base film 7;

[0091] C12. According to the thickness of the base film 7, adjust the distance between the guide roller 21 and the pressure roller 23;

[0092] C13. Sensing the real-time tension of the basement membrane 7;

[0093] C14. According to the real-time tension of the base film 7, the guide roller 21 is controlled to translate so that the guide roller 21 is close to or away from the pressure roller 23;

[0094] The guide roller 21 is located at one side of the pressure roller 23 .

[0095] In actual use, the movement of the guide roller 21 is controlled by the guide translation module 28. The specific structure of the guide translation module 28 is basically the same as the coordination and separation of the flip member 12, the flip control member 15, the limit member 16, and the limit control member 17 in the anti-static mechanism 11, and will not be repeated here. That is, the maximum stroke of the guide translation module 28 is set according to the thickness of the base film 7, so as to ensure that when the guide roller 21 moves to the maximum stroke position, the base film 7 can just pass through the gap between the pressure roller 23 and the guide roller 21. At the same time, the present invention detects the real-time tension through the tension detection device 29. When the tension is too large, it is only necessary to let the guide translation module 28 control the guide roller 21 away from the pressure roller 23, and the angle of the contact position between the base film 7 and the pressure roller 23 can be adjusted by changing the position of the guide roller 21, so as to achieve the effect of reducing the tension of the base film 7 at the coating mechanism 2.

[0096] The curing machine 3 is used to perform step D, and the curing machine 3 includes a curing machine body 30, a low-pressure UV lamp 31, a medium-pressure UV lamp 32, a temperature detector 33, a blowing module 34, and an exhaust module 35, all of which are arranged in the curing machine body 30, and the curing machine body 30 has a curing chamber, and the low-pressure UV lamp 31 and the medium-pressure UV lamp 32 are arranged in the curing chamber in sequence. That is, step D specifically includes:

[0097] D1. The coated base film 7 is cured once by a low-pressure UV lamp 31;

[0098] D2. The base film 7 is cured after the primary curing by a medium pressure UV lamp 32;

[0099] Wherein, step D1 and step D2 are performed in the same space via the same curing machine 3; when executing steps D1 and D2, the real-time temperature in the curing machine 3 is sensed, and the working speeds of the blowing module 34 and the exhaust module 35 are adjusted according to the real-time temperature.

[0100] That is, the base film 7 is successively subjected to low-pressure UV curing and medium-pressure UV curing in the curing chamber, and the coating is gradually cured by means of secondary curing, so as to achieve the required performance. During curing, the temperature in the curing chamber needs to be kept appropriate, so the temperature in the curing chamber is detected by the temperature detector 33. When the temperature in the curing chamber exceeds the threshold, the power of the blowing module 34 and the exhaust module 35 is increased to increase the gas velocity in the curing chamber, thereby reducing the temperature of the curing chamber; if the temperature of the curing chamber is too low, the blowing module 34 and the exhaust module 35 are decelerated or closed to reduce the heat exchange rate between the curing chamber and the outside world, so as to achieve the heat preservation of the curing chamber.

[0101] In the above process, it can be effectively ensured that the temperature in the curing chamber is always within the required temperature range, thereby ensuring the curing efficiency.

[0102] Specifically, a curing lifting module 37 is provided in the curing chamber, that is, before step D1, it also includes:

[0103] Acquire the coated surface image of the base film 7 and the current brightness around the base film 7 through the brightness detector 36;

[0104] According to the current brightness around the base film 7, the surface image is subjected to brightness processing;

[0105] Analyze the surface image after brightness treatment to obtain the curing state of the coating;

[0106] According to the curing state of the coating, the low-pressure UV lamp 31 and the medium-pressure UV lamp 32 are controlled to rise and fall, so as to adjust the distance between the low-pressure UV lamp 31 , the medium-pressure UV lamp 32 and the base film 7 , respectively.

[0107] Due to various factors, the humidity (curing state) of the coating applied to the base film 7 will vary. Therefore, the present invention needs to adjust the distance between the low-pressure UV lamp 31, the medium-pressure UV lamp 32 and the base film 7 according to the humidity of the coating, so as to adjust the curing rate. Preferably, in order to ensure accurate judgment of the humidity of the coating, the present invention will adjust the brightness of the captured image in combination with the brightness of the surrounding environment when the image is captured, so as to ensure that the image used to judge the humidity is finally achieved at the reference brightness. After the coating humidity is judged, the low-pressure UV lamp 31 and the medium-pressure UV lamp 32 can be controlled to rise and fall through the curing lifting module 37 to adjust the distance from the base film 7, thereby achieving the effect of adjusting the curing rate.

[0108] There are two modes of the curing lifting module 37. One is that one curing lifting module 37 drives the low-pressure UV lamp 31 and the medium-pressure UV lamp 32 to rise and fall at the same time. The other is to equip the low-pressure UV lamp 31 and the medium-pressure UV lamp 32 with a curing lifting module 37 respectively, so that the low-pressure UV lamp 31 and the medium-pressure UV lamp 32 do not interfere with each other in rising and falling.

[0109] In addition, the low-voltage UV lamp 31 is connected to a low-voltage power supply, and the medium-voltage UV lamp 32 is connected to a medium-voltage power supply. In addition to the curing lifting module 37 controlling the low-voltage UV lamp 31 and the medium-voltage UV lamp 32 to lift and lower to control the curing effect, the present invention can also control the output power through the low-voltage power supply and the medium-voltage power supply, thereby adjusting the effect of the low-voltage UV lamp 31 and the medium-voltage UV lamp 32 respectively curing the base film 7. Combined with the image analysis of the humidity of the base film 7, the adjustable range of the curing rate is larger and more flexible.

[0110] The low voltage power supply and the medium voltage power supply are respectively provided with power controllers to achieve the effect of controlling the output power.

[0111] In this embodiment, the film placing mechanism 4 is used to perform step E, and the number of the film placing mechanisms 4 is two; the film placing mechanism 4 includes a film placing module 41, a clamping module 42, a film placing driving member 43, a film placing tension detector 44, a film placing member 45, and a film placing tension roller 46. The film placing module 41 is used to assemble the material roll of the protective film 8, the clamping module 42 is used to position the material roll to the film placing module 41, the film placing tension detector 44 is used to detect the tension of the protective film 8 of the base film 7, one end of the film placing member 45 is rotatably mounted on the film placing mechanism 4, the film placing tension roller 46 is mounted on the other end of the film placing member 45, and the film placing driving member 43 is used to drive the film placing member 45 to rotate;

[0112] In actual use, the steps of the film placing mechanism 4 specifically include:

[0113] Y1. Release the protective film 8 through the film release module 41;

[0114] Y2. In the process of releasing the protective film 8, the current tension F of the protective film 8 is detected by the film tension detector 44;

[0115] Y3. Provide a preset tension F0, and calculate the tension difference F' according to F' = F - F0;

[0116] Y4. Take the absolute value of the tension difference F', and determine whether |F'| is within the preset range. If so, execute step Y5; otherwise, execute step Y6;

[0117] Y5. Calculate the rotation path length S of the film releasing member 45 according to S = k * F', and drive the film releasing member 45 to rotate by the film releasing driving member 43 according to S;

[0118] Y6. The film releasing driving member 43 does not drive the film releasing member 45 to rotate;

[0119] Wherein, when S > 0, the film releasing member 45 rotates counterclockwise; when S < 0, the film releasing member 45 rotates smoothly.

[0120] That is, in the film releasing mechanism 4, the material roll is limited to the film releasing module 41 by the clamping module 42, and the film releasing module 41 drives the material roll to rotate to release the protective film 8. When releasing the protective film 8, the protective film 8 will contact the film releasing tension detector 44, and the film releasing tension detector 44 detects the tension of the protective film 8: when the tension of the protective film 8 exceeds or is lower than the preset range, tension adjustment is required, that is, by controlling the swing of the film releasing tension roller 46, to control the lifting and then lowering of the film releasing tension roller 46, so as to achieve the effect of changing the contact force received by the protective film 8. By swinging the film releasing tension roller 46, the height change of the film releasing tension roller 46 is more delicate, so that the tension control of the protective film 8 is more accurate.

[0121] In this embodiment, the laminating mechanism 5 is used to execute step E. The laminating mechanism 5 includes a laminating body 51, a laminating guide roller 52, a laminating lifting module 53, a first laminating roller 54, a second laminating roller 55, a laminating flipping member 56, a laminating control block 57, and a laminating translation module 58. The laminating lifting module 53 is used to drive the laminating guide roller 52 to lift and lower. There is a laminating gap between the first laminating roller 54 and the second laminating roller 55 for laminating the protective film 8 and the base film 7. The first laminating roller 54 is installed on the laminating flipping member 56. One end of the laminating flipping member 56 is rotatably installed on the laminating body 51, and a contact wheel 561 is provided at the other end of the laminating flipping member 56. A laminating inclined surface 571 is provided at the top of the laminating control block 57, and the contact wheel 561 abuts against the laminating inclined surface 571. The laminating translation module 58 is used to drive the laminating control block 57 to move back and forth in the horizontal direction.

[0122] That is, the present invention achieves the effect of laminating the base film 7 and the two protective films 8 passing between the first laminating roller 54 and the second laminating roller 55 by cooperating with each other. In order to adjust the depth of the laminating gap with high precision, the present invention adopts the laminating slope 571 and the abutment wheel 561 to achieve the height change of the first laminating roller 54 relative to the second laminating roller 55.

[0123] During operation, the rotation drive of the laminating flipping member 56 is specifically as follows: the laminating translation module 58 drives the laminating control block 57 to move back and forth, thereby changing the way in which the laminating inclined surface 571 and the abutment wheel 561 abut against each other, thereby forcing the laminating flipping member 56 to rotate.

[0124] It should be noted that the clamping module 42 of the present invention includes a clamping swing member 421, a clamping cylinder 422 and a locking block 423. The end of the clamping swing member 421 has a clamping groove 424, and the clamping groove 424 is used to accommodate the material roll; and the clamping cylinder 422 is used to control the locking block 423 to move back and forth, thereby controlling the locking block 423 and the clamping groove 424 to cooperate to form an arc structure, so as to achieve a limiting effect on the material roll, and to make more space for replacing the material roll when unlocking.

[0125] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A PET film coating composite process, characterized in that: The following steps are involved: A. Unwind the base film and pull the base film to move; B. Remove dust and static electricity from the base film; C. coating the base film through multiple small rollers; D. UV treatment of the coated base film to cure the coating on the surface of the base film; E. Unwinding the two layers of protective films, and then laminating the two layers of protective films to the two surfaces of the base film respectively to form a composite film; F. Roll up the composite film.

2. The PET film coating composite process according to claim 1, characterized in that: A reel is provided, the reel has a static electricity removal mechanism, the static electricity removal module comprises a flip part, a first static electricity removal roller, a second static electricity removal roller, a flip control part, a limit part and a limit control part, the limit part has a limit slope, one end of the flip part is rotatably set on the unwinder, the first static electricity removal roller is installed on the flip part, the other end of the flip part abuts against the limit slope, the flip control part drives the other end of the flip part, the limit control part is used to drive the limit part to move to change the position where the limit slope abuts against the flip part, and there is a static electricity removal gap between the first static electricity removal roller and the second static electricity removal roller.

3. The PET film coating composite process according to claim 2, characterized in that: The static electricity removal mechanism also includes a static electricity sensor; the static electricity removal action in step B specifically includes: B1. Conduct electrostatic detection on the base film after dust removal through an electrostatic sensor; B2. According to the electrostatic detection results, determine whether the electrostatic content of the base film meets the requirements. If so, execute step B3, otherwise execute step B4; B3. The flip control member controls the flip member to lift up, so as to drive the first anti-static roller away from the second anti-static roller; B4. The flip control member controls the flip member to descend until the flip member contacts the limit inclined surface, and the first anti-static roller and the second anti-static roller contact the two sides of the base film respectively to eliminate static electricity.

4. The PET film coating composite process according to claim 1, characterized in that: A coating mechanism for performing step C is provided, the coating mechanism comprising a guide roller, a feeding module, a pressure roller and a plurality of small rollers, the plurality of small rollers are rotatably arranged on the feeding module, the guide roller is located on one side of the pressure roller, and the pressure roller is located directly above the plurality of small rollers; step C specifically comprises: C1. The base film is guided to move between the pressure roller and the small roller by the guide roller; C2. The pressure roller presses the base film to the direction of the small roller and drives the base film to move; C3. The coating is picked up in the feeding module through a small roller and applied to the base film.

5. The PET film coating and laminating process according to claim 4, characterized in that: The coating mechanism also includes a feeding lifting module, which is used to drive the feeding module to rise and fall relative to the pressure roller; the feeding module has an arc groove, the shape of the arc groove is adapted to the shape of the pressure roller, and multiple small rollers are arranged in sequence along the path of the arc groove.

6. The PET film coating and laminating process according to claim 4, characterized in that: Step C1 specifically includes: C11. Obtain the thickness of the base film; C12. Adjust the distance between the guide roller and the pressure roller according to the thickness of the base film; C13. Sense the real-time tension of the basement membrane; C14. According to the real-time tension of the base film, the guide roller is controlled to translate so that the guide roller is close to or away from the pressure roller; Among them, the guide roller is located on one side of the pressure roller.

7. The PET film coating and laminating process according to claim 1, characterized in that: Step D specifically includes: D1. The coated base film is cured once by a low-pressure UV lamp; D2. Perform secondary curing of the primary cured base film by a medium pressure UV lamp; Wherein, step D1 and step D2 are performed in the same space via the same curing machine; when executing steps D1 and D2, the real-time temperature in the curing machine is sensed, and the working speeds of the blowing module and the exhaust module are adjusted according to the real-time temperature.

8. The PET film coating and laminating process according to claim 7, characterized in that: Before step D1, it further includes: Obtaining the surface image of the coated base film and the current brightness around the base film; Performing brightness processing on the surface image according to the current brightness around the base film; Analyzing the surface image after brightness processing to obtain the curing state of the coating; Controlling the lifting of the low-pressure UV lamp and the medium-pressure UV lamp according to the curing state of the coating to adjust the distances between the low-pressure UV lamp and the medium-pressure UV lamp and the base film respectively.

9. The PET film coating and laminating process according to claim 1, characterized in that: Providing a film feeding mechanism for performing step E, and the number of film feeding mechanisms is two; the film feeding mechanism includes a film feeding module, a clamping module, a film feeding driving part, a film feeding tension detector, a film feeding part, and a film feeding tension roller. The film feeding module is used for assembling the material roll of the protective film, the clamping module is used for positioning the material roll to the film feeding module, the film feeding tension detector is used for detecting the tension of the protective film of the base film, one end of the film feeding part is rotatably installed on the film feeding mechanism, the film feeding tension roller is installed at the other end of the film feeding part, and the film feeding driving part is used for driving the film feeding part to rotate; The operation steps of the film feeding mechanism specifically include: Y1. Releasing the protective film through the film feeding module; Y2. During the process of releasing the protective film, detecting the current tension F of the protective film through the film feeding tension detector; Y3. Providing a preset tension F0, and calculating the tension difference F' according to F' = F - F0; Y4. Taking the absolute value of the tension difference F', and judging whether |F'| is within the preset range. If so, execute step Y5, otherwise execute step Y6; Y5. Calculating the rotation path length S of the film feeding part according to S = k * F', and driving the film feeding part to rotate by the film feeding driving part according to S; Y6. The film feeding driving part does not drive the film feeding part to rotate; Wherein, when S > 0, the film feeding part rotates counterclockwise; when S < 0, the film feeding part rotates smoothly.

10. The PET film coating and laminating process according to claim 9, characterized in that: Providing a laminating mechanism for performing step E, the laminating mechanism includes a laminating body, laminating guide rollers, a laminating lifting module, a first laminating roller, a second laminating roller, a laminating flipping part, a laminating control block, and a laminating translation module. The laminating lifting module is used for driving the laminating guide rollers to lift. There is a laminating gap between the first laminating roller and the second laminating roller for laminating the protective film and the base film. The first laminating roller is installed on the laminating flipping part. One end of the laminating flipping part is rotatably installed on the laminating body, and a抵触轮 (it seems there is a wrong word here, assuming it should be something like "contact wheel") is provided at the other end of the laminating flipping part. The top of the laminating control block is provided with a laminating inclined surface, and the contact wheel抵触 the laminating inclined surface. The laminating translation module is used for driving the laminating control block to move back and forth in the horizontal direction.

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