Flexible dry dual-purpose composite machine

Abstract

This utility model discloses a flexible dry dual-purpose laminating machine, relating to the field of packaging machinery technology. The laminating machine includes a frame, with a drying tunnel at the top. Below one side of the drying tunnel, a first unwinding unit, a flexographic coating unit, and a dry coating unit are sequentially arranged; on the other side, a dual-substrate laminating unit and a second unwinding unit are arranged. The drying tunnel is equipped with a heat insulation layer and a hot air circulation system. The flexographic coating unit employs a unique adhesive quantity adjustment mechanism. A "tightening cylinder + first limiter" drives a slider to move along a guide rail, precisely controlling the gap between the adhesive delivery roller and the metering anilox roller. Simultaneously, an "airbag + second limiter" controls the contact pressure between the metering anilox roller and the coating roller. Combined with the axial locking structure of the coating roller and the double-film coupling transmission, high-precision stepless adjustment of the coating quantity and stable pressure control are achieved. This utility model integrates dry and flexible laminating functions, solving the problems of large footprint, uneven coating, and unstable pressure in existing equipment.

Description

Technical Field

[0001] This utility model relates to the field of laminating machine equipment technology, and in particular to a dual-purpose laminating machine that integrates flexible solvent-free lamination and dry solvent-based lamination. Background Technology

[0002] In the flexible packaging and composite materials manufacturing industry, companies typically need to configure two types of equipment: flexible solvent-free laminating machines and dry laminating machines, to meet different market demands. Flexible solvent-free laminating machines are suitable for general food packaging, offering advantages such as environmental friendliness and low energy consumption; dry laminating machines are suitable for pharmaceutical and high-end packaging with high requirements for barrier properties and high-temperature resistance, but they consume more energy and require waste gas treatment.

[0003] The existing technology has the following significant drawbacks:

[0004] High land occupation and investment costs: The two types of equipment are set up independently, occupying a large amount of factory space, and the equipment procurement and maintenance costs are high, resulting in low land utilization.

[0005] Insufficient adjustment precision: Whether it is flexible coating or dry coating, precise control of the adhesive amount has always been a challenge. Traditional equipment mostly uses manual adjustment of the roller gap, which is slow to respond and lacks effective axial positioning. This causes the rollers to easily move axially during high-speed operation, resulting in uneven coating, wrinkling, or film breakage.

[0006] High energy consumption in drying tunnels: Dry composite drying tunnels suffer from severe heat dissipation and lack effective heat circulation and insulation design, resulting in energy waste.

[0007] Therefore, there is an urgent need for an integrated composite equipment that can be compatible with two processes, saves space, and has high coating precision. Utility Model Content

[0008] To address the aforementioned problems, the purpose of this utility model is to provide a flexible dry dual-purpose laminating machine to solve the problems of large equipment footprint, low coating accuracy, and high energy consumption in the prior art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a flexible dry dual-purpose laminating machine, comprising a frame, characterized in that a drying tunnel is provided at the upper end of the frame, and a first unwinding unit, a flexographic coating unit, and a dry coating unit are sequentially arranged below one side of the drying tunnel, and a dual-base laminating unit and a second unwinding unit are arranged on the other side of the drying tunnel; the flexographic coating unit includes two side plates, and a glue tray, a glue delivery roller, a metering anilox roller, and a coating roller are sequentially installed between the two side plates, the glue delivery roller is partially immersed in the glue in the glue tray, a liftable coating pressure roller is provided above the coating roller, and swing arms are rotatably installed on the two side plates respectively, the glue delivery roller and the metering anilox roller are installed between the two swing arms, and the swing arms are oscillating and adjusting by a fine-tuning drive mechanism, so that the gap between the metering anilox roller and the coating roller is adjustable, and the gap between the glue delivery roller and the metering anilox roller is also adjustable.

[0010] The present invention is further configured such that: the drying tunnel includes an upper cover and a lower cover, a conveying channel is provided between the upper cover and the lower cover, the inner walls of the upper cover and the lower cover are both provided with heat insulation layers, the conveying channel is provided with conveying rollers evenly distributed in sequence, and hot air inlets and return air inlets are arranged in sequence at the upper and lower positions of the conveying channel, the hot air inlets are connected to hot air ducts, and the return air inlets are connected to return air ducts.

[0011] The present invention is further configured as follows: a guide rail is fixed on the swing arm, a slider is installed on the guide rail, a glue delivery roller is installed between the sliders, the two ends of the glue delivery roller are installed between the sliders, a clamping cylinder is provided on one side of the slider, a first limiter is provided on the other side, and the slider is clamped between the piston rod of the clamping cylinder and the telescopic rod of the first limiter.

[0012] The present invention is further configured such that: the first limiter includes a housing, a turbine, a worm gear, and a telescopic push rod; the housing has a guide groove and a limiting movable groove; the telescopic push rod is slidably mounted on the guide groove; the turbine is limited to rotate within the limiting movable groove; the inner end of the telescopic push rod is provided with a threaded rod, which is screwed into the central threaded hole of the turbine; the worm gear meshes with the turbine for transmission; and the outer end of the worm gear extends out of the housing and is connected to a first adjusting handwheel.

[0013] The present invention is further configured such that: the fine-tuning drive mechanism includes an airbag mounted on the side plate, the airbag being connected to an air pump via a solenoid valve, and the bottom of the swing arm abutting against the top of the airbag; a second limiter is also fixedly mounted on the side plate, the telescopic top rod of the second limiter pressing vertically downward against the top of the swing arm, the second limiter having the same structure as the first limiter, and the end of the worm gear of the second limiter extending out of the housing being connected to a second adjusting handwheel via a universal joint and a connecting rod.

[0014] The present invention is further configured such that: vertical guide rails and lifting cylinders are respectively provided at both ends of the coating roller; a slide is provided on the vertical guide rail; the end of the coating roller is rotatably mounted on the slide; and the piston rod of the lifting cylinder is connected to the slide; the coating roller is a steel roller, and the coating roller is a flexible roller wrapped with a rubber sleeve.

[0015] The present invention is further configured such that the glue delivery roller, the metering anilox roller, the coating roller, and the coating pressure roller are each driven by their respective motors.

[0016] The present invention is further configured such that: one end of the coating roller is mounted on the mounting hole of the side plate through the first bearing, and the other end is mounted on the mounting hole on the other side through the second bearing; the other end of the coating roller is provided with a threaded part, and a limiting ring is sleeved on the threaded part and then locked by a locking nut so that the limiting ring contacts the end face of the second bearing; the other end of the coating roller passes through the mounting hole and is connected to the corresponding motor drive through a double diaphragm coupling.

[0017] The beneficial effects of this utility model are:

[0018] 1. Functional integration and space saving: By integrating the flexographic coating unit, dry coating unit and drying tunnel on the same rack, one machine can realize both dry lamination and solvent-free / hot melt adhesive flexible lamination processes, which greatly reduces the number of equipment and floor space, and lowers the investment costs for enterprises.

[0019] 2. High coating precision: The position of the glue delivery roller is adjusted by a combination structure of "tightening cylinder + worm gear limiter". The rigid self-locking characteristics of the worm gear are used to achieve micron-level precise control and long-term locking of glue transfer amount, thus solving the problem of uneven coating.

[0020] 3. Stable pressure control: The contact pressure between the metering anilox roller and the coating roller is controlled by "airbag + second limiter". Combined with the vertical lifting guide rail structure of the coating pressure roller, the constant and linear transmission of pressure is ensured during the coating process, effectively avoiding material wrinkles and streaks.

[0021] 4. High operational reliability: The coating roller adopts a positioning and transmission method with a locking nut and a double diaphragm coupling, which completely eliminates axial movement under high-speed operation and improves the operational stability and service life of the equipment.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a general assembly drawing of a specific embodiment of the present utility model;

[0024] Figure 2 The structure of the flexographic coating unit in a specific embodiment of this utility model Figure 1 ;

[0025] Figure 3 The structure of the flexographic coating unit in a specific embodiment of this utility model Figure 2 ;

[0026] Figure 4 The structure of the flexographic coating unit in a specific embodiment of this utility model Figure 3 ;

[0027] Figure 5 This is a partial structural diagram of the flexographic coating unit in a specific embodiment of this utility model;

[0028] Figure 6 for Figure 4 Enlarged view of A in the middle;

[0029] Figure 7 This is a cross-sectional view of the drying tunnel in a specific embodiment of this utility model;

[0030] Figure 8 This is a top view of the drying tunnel in a specific embodiment of this utility model.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Drying tunnel; 3. First unwinding unit; 4. Flexographic coating unit; 5. Dry coating unit; 6. Dual-base composite unit; 7. Second unwinding unit; 101. Side plate; 102. Glue tray; 103. Glue delivery roller; 104. Metering anilox roller; 105. Coating roller; 106. Coating pressure roller; 107. Swing arm; 108. Fine-tuning drive mechanism; 109. Airbag; 1090. Guide rail; 1091. Slider; 1092. Tightening cylinder; 110. First limiter; 111. Telescopic top rod; 12. Vertical guide rail; 113. Lifting cylinder; 114. Slide; 115. Mounting hole; 116. Second limit switch; 117. First adjusting handwheel; 118. Second adjusting handwheel; 1181. Threaded part; 119. Limit ring; 120. Locking nut; 121. Double diaphragm coupling; 122. Motor; 201. Upper cover; 202. Lower cover; 203. Conveying channel; 204. Heat insulation layer; 205. Conveying roller; 206. Hot air inlet; 207. Return air inlet; 208. Hot air duct; 209. Return air duct. Detailed Implementation

[0032] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0033] like Figure 1As shown, this embodiment discloses a flexible dry dual-purpose laminating machine, the core of which is that an drying tunnel 2 is provided at the upper end of the frame 1. A first unwinding unit 3, a flexographic coating unit 4 and a dry coating unit 5 are arranged sequentially below one side of the drying tunnel 2, and a dual-base laminating unit 6 and a second unwinding unit 7 are arranged on the other side of the drying tunnel 2.

[0034] Specifically, such as Figure 7 , Figure 8 As shown, the drying tunnel 2 includes an upper cover 201 and a lower cover 202, with a conveying channel 203 between them. To reduce heat loss and energy consumption, heat insulation layers 204 are provided on the inner walls of both the upper cover 201 and the lower cover 202. Multiple conveying rollers 205 are arranged evenly in sequence within the conveying channel 203 to support and convey the substrate. Hot air inlets 206 and return air inlets 207 are arranged sequentially above and below the conveying channel 203, with the hot air inlets 206 connected to a hot air duct 208 and the return air inlets 207 connected to a return air duct 209, forming a highly efficient heat circulation system.

[0035] Specifically, such as Figure 2 — Figure 6 As shown, the flexographic coating unit 4 is the core for achieving high-precision coating, and it includes two side plates 101. Between the two side plates 101, a glue tray 102, a glue delivery roller 103, a metering anilox roller 104, and a coating roller 105 are installed sequentially. During operation, the lower part of the glue delivery roller 103 is immersed in the glue in the glue tray 102, carrying the glue up. Above the coating roller 105, a liftable coating pressure roller 106 is provided. Swing arms 107 are rotatably mounted on the two side plates 101, and the glue delivery roller 103 and the metering anilox roller 104 are installed between the two swing arms 107. The swing arms 107 are oscillating and adjusted by a fine-tuning drive mechanism 108, thereby realizing stepless adjustment of the gap between the metering anilox roller 104 and the coating roller 105.

[0036] The specific operation of the adhesive application amount adjustment and control mechanism is as follows: A coating roller 105, two swing arms 107, and an adhesive tray 102 are installed between the two side plates 101. An adhesive delivery roller 103 and a metering anilox roller 104 are installed between the swing arms 107 via bearings. To achieve fine adjustment of the position of the adhesive delivery roller 103, a guide rail 1090 is fixed on the swing arm 107, and a slider 1091 is installed on the guide rail 1090. The two ends of the adhesive delivery roller 103 are fixedly installed between the sliders 1091. A clamping cylinder 1092 is located on the left side of the slider 1091, and a first limiter 110 is located on the right side. The slider 1091 is securely clamped between the piston rod of the clamping cylinder 1092 and the telescopic push rod 111 of the first limiter 110. The clamping cylinder 1092 provides a constant preload to ensure smooth adjustment.

[0037] The first limiter 110 employs a high-precision worm gear structure. It includes a housing, a worm gear, a worm, and a telescopic push rod 111 serving as a telescopic push block. The housing has a guide groove and a limiting movable groove. The telescopic push rod 111 is slidably mounted on the guide groove, while the worm gear is limited to rotate within the limiting movable groove. The inner end of the telescopic push rod 111 has a threaded rod that screws into the central threaded hole of the worm gear. The worm gear meshes with the worm gear for transmission, and the outer end of the worm gear extends out of the housing and is connected to a first adjusting handwheel 117. When the operator rotates the first adjusting handwheel 117, the worm gear's deceleration and torque-increasing action drives the telescopic push rod 111 to move linearly, thereby overcoming the thrust of the clamping cylinder 1092 and pushing the slider 1091 to move slightly along the guide rail 1090. This ultimately precisely adjusts the minute gap between the glue-dispensing roller 103 and the metering anilox roller 104, thus precisely controlling the amount of glue picked up.

[0038] Meanwhile, to adjust the contact pressure between the metering anilox roller 104 and the coating roller 105, an air bladder 109 is installed on the side plate 101. The air bladder 109 is connected to an air pump via a solenoid valve. The bottom of the swing arm 107 abuts against the top of the air bladder 109. When the air bladder 109 inflates, it drives the swing arm 107 to swing upward around the fulcrum, making the metering anilox roller 104 tightly adhere to the coating roller 105. To prevent the air bladder 109 from being damaged due to excessive pressure or exceeding the pressure limit, a second limiter 116 is also fixedly installed on the side plate 101. The structure of the second limiter 116 is exactly the same as that of the first limiter 110, with its second telescopic push rod pressing vertically downward against the top of the swing arm 107. The end of the worm gear of the second limiter 116 extending out of the housing is connected to the second adjusting handwheel 118 via a universal joint and a connecting rod. By rotating the second adjusting handwheel 118, the final stop position of the swing arm 107 can be precisely controlled, thereby precisely limiting the linear pressure between the two rollers.

[0039] In addition, to ensure the uniformity of coating thickness, a scraper can be provided below the coating roller 105, with the blade edge close to the surface of the coating roller 105, to scrape off excess glue.

[0040] In the coating and pressing section, vertical guide rails 112 and lifting cylinders 113 are respectively installed at both ends of the coating roller 106. A slide block 114 is mounted on the vertical guide rail 112, and the end of the coating roller 106 is rotatably mounted on the slide block 114. The piston rod of the lifting cylinder 113 is connected to the slide block 114. The coating roller 106 is a steel roller, and the coating roller 105 is a flexible roller wrapped with a rubber sleeve; this combination of rigidity and flexibility ensures coating quality. The glue delivery roller 103, the metering anilox roller 104, the coating roller 105, and the coating roller 106 are each driven by their own independent motor 122, facilitating speed ratio adjustment.

[0041] To prevent axial displacement of the coating roller 105 under high-speed rotation, a specialized positioning mechanism is designed. This mechanism includes horizontal coaxial mounting holes 115 on both side plates 101. One end of the coating roller 105 is mounted in one mounting hole 115 via a first bearing, and the other end is mounted in the other mounting hole 115 via a second bearing. The other end of the coating roller 105 has a threaded portion 1181. A limiting ring is fitted onto the threaded portion 1181 and then locked by a locking nut 120, causing the limiting ring to contact the end face of the second bearing, thereby restricting the axial movement of the coating roller 105. The other end of the coating roller 105 passes through the mounting hole 115 and is connected to the corresponding motor 122 via a double diaphragm coupling 121. The double diaphragm coupling 121 can also compensate for installation errors.

[0042] Work process:

[0043] First, select the coating mode according to the process requirements. If dry lamination is to be performed, dry coating unit 5 is activated, and the substrate enters the drying tunnel 2 for drying after coating; if flexible lamination is to be performed, flexible coating unit 4 is activated.

[0044] When the flexographic coating unit 4 is in operation, the equipment is started, and the glue delivery roller 103 rotates, carrying glue to the metering anilox roller 104. The gap between the glue delivery roller 103 and the metering anilox roller 104 is adjusted by rotating the first adjusting handwheel 117 to determine the amount of glue. Then, the airbag 109 is inflated, lifting the swing arm 107 to bring the two rollers together, and the contact pressure is finely adjusted and locked by the second adjusting handwheel 118. The substrate passes between the coating roller 105 and the coating pressure roller 106, and after coating, it passes through a non-heated drying tunnel and finally enters the laminating unit.

[0045] In conclusion, the above structure is not an improvement on a single component, but a systemic optimization:

[0046] 1. From a macro perspective, the problem of equipment redundancy was solved through integrated design;

[0047] 2. At the micro level, the innovative introduction of the control concept of "pneumatic flexibility + worm gear rigid limit" has overcome the industry problem of precise and stable control of pressure and gap during the coating process;

[0048] 3. Structurally, the equipment's reliability is ensured through multiple anti-slip and guiding designs, ensuring its operation at high speeds.

[0049] Together, they form a composite device with high coating precision, high stability, and low energy consumption.

Claims

1. A flexible dry dual-complex machine comprising a frame (1), characterized in that, The upper end of the frame (1) is provided with a drying tunnel (2). A first unwinding unit (3), a flexographic coating unit (4), and a dry coating unit (5) are arranged sequentially below one side of the drying tunnel (2). A double-base composite unit (6) and a second unwinding unit (7) are arranged on the other side of the drying tunnel (2). The flexographic coating unit (4) includes two side plates (101). A glue tray (102), a glue delivery roller (103), a metering anilox roller (104), and a coating roller (105) are installed sequentially between the two side plates (101). The glue delivery roller (103) is partially immersed in the glue in the glue tray (102). A liftable coating pressure roller (106) is provided above the coating roller (105). A swing arm (107) is rotatably installed on each of the two side plates (101). The glue delivery roller (103) and the metering anilox roller (104) are installed together. Between the two swing arms (107), the swing arms (107) are oscillating and adjusted by the fine-tuning drive mechanism (108) so that the gap between the metering anilox roller (104) and the coating roller (105) is adjustable, and the gap between the glue delivery roller (103) and the metering anilox roller (104) is also adjustable. The fine-tuning drive mechanism (108) includes an airbag (109) installed on the side plate (101). The airbag (109) is connected to an air pump through a solenoid valve. The bottom of the swing arm (107) abuts against the top of the airbag (109). A second limiter (116) is also fixedly installed on the side plate (101). The telescopic top rod of the second limiter (116) presses vertically downward against the top of the swing arm (107). The end of the worm gear of the second limiter (116) extending out of the housing is connected to the second adjusting handwheel (118) through a universal joint and a connecting rod.

2. The flexible dry dual compound machine of claim 1, wherein, The drying tunnel (2) includes an upper cover (201) and a lower cover (202). A conveying channel (203) is provided between the upper cover (201) and the lower cover (202). The inner walls of the upper cover (201) and the lower cover (202) are both equipped with heat insulation layers (204). A conveying roller (205) is arranged in sequence in the conveying channel (203). A hot air inlet (206) and a return air inlet (207) are arranged in sequence at the upper and lower positions of the conveying channel (203). The hot air inlet (206) is connected to the hot air duct (208), and the return air inlet (207) is connected to the return air duct (209).

3. The flexible dry dual compound machine of claim 1, wherein, It also includes a guide rail (1090) fixed on the swing arm (107), a slider (1091) is installed on the guide rail (1090), a glue delivery roller (103) is installed between the sliders (1091), the two ends of the glue delivery roller (103) are installed between the sliders (1091), a clamping cylinder (1092) is provided on one side of the slider (1091), and a first limiter (110) is provided on the other side. The slider (1091) is clamped between the piston rod of the clamping cylinder (1092) and the telescopic push rod (111) of the first limiter (110).

4. The flexible dry dual compound machine of claim 3, wherein, The first limiter (110) includes a housing, a turbine, a worm gear, and a telescopic push rod (111). The housing has a guide groove and a limiting movable groove. The telescopic push rod (111) is slidably mounted on the guide groove. The turbine is limited to rotate within the limiting movable groove. The inner end of the telescopic push rod (111) is provided with a threaded rod, which is screwed into the central threaded hole of the turbine. The worm gear meshes with the turbine for transmission. The outer end of the worm gear extends out of the housing and is connected to a first adjusting handwheel (117).

5. The flexible dry dual compound machine of claim 1, wherein, The coating roller (106) is provided with a vertical guide rail (112) and a lifting cylinder (113) at both ends. A slide (114) is provided on the vertical guide rail (112). The end of the coating roller (106) is rotatably mounted on the slide (114). The piston rod of the lifting cylinder (113) is connected to the slide (114).

6. The flexible dry dual compound machine of claim 1, wherein, The glue delivery roller (103), metering anilox roller (104), coating roller (105), and coating pressure roller (106) are each driven by their respective motors (122).

7. The flexible dry dual compound machine of claim 1, wherein, One end of the coating roller (105) is mounted on the mounting hole (115) of the side plate (101) through the first bearing, and the other end is mounted on the mounting hole (115) on the other side through the second bearing. The other end of the coating roller (105) is provided with a threaded part (1181). A limiting ring (119) is sleeved on the threaded part (1181) and then locked by a locking nut (120) so that the limiting ring (119) contacts the end face of the second bearing. The other end of the coating roller (105) passes through the mounting hole (115) and is connected to the corresponding motor (122) through a double diaphragm coupling (121).

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