A coating head with multiple coating methods

Abstract

A coating head with multiple coating modes includes a frame, a coating mechanism and multiple guide mechanisms, each of which is mounted on the frame and arranged in sequence from front to back, and the guide mechanism is a liftable guide roller mechanism; the coating mechanism includes a glue coating component, a first scraper component, a second scraper component, a glue scraping modification component and a liftable pressure roller component, the glue coating component includes a glue storage tank, a glue coating roller and a glue coating motor, and the glue coating roller is located between two liftable guide roller mechanisms adjacent to each other; the first scraper component and the second scraper component are located at the front and rear sides of the glue coating roller respectively; the glue scraping modification component is arranged between the other two liftable guide roller mechanisms adjacent to each other and located behind the glue coating roller; the coating head switches four coating modes by selecting and controlling the glue coating roller and the glue scraping modification component. This coating head integrates multiple coating modes, can switch different coating modes, is easy to flexibly adjust the coating thickness, and meets different coating requirements.

Description

Technical Field

[0001] The invention relates to the field of coating machines, and in particular to a coating head with multiple coating modes. Background Art

[0002] Coating machines are mainly used for surface coating production of substrates such as films and paper. They can coat the rolled substrate with a layer of glue, paint or ink with specific functions, and then rewind it after drying.

[0003] At present, as users have higher and higher performance requirements and diversified demands for coating products, different coating products require different coating thicknesses and other requirements. However, traditional coating machines generally only have one coating method, and cannot switch coating methods or flexibly adjust coating thicknesses, which lacks flexibility and universality. When adapting to multiple coating methods, it is necessary to have various types of coating heads on standby. When using different coating methods, the coating head must be replaced, and the coating head is generally large in size, which not only occupies the production workshop area and increases equipment costs, but also some coating heads are only used occasionally, and are vacant for a long time and age, causing serious waste of equipment resources. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a coating head with multiple coating methods. This coating head integrates multiple coating methods into one, can switch between different coating methods, and is easy to flexibly adjust the coating thickness to meet the different coating requirements of different coating products on substrates. The adopted technical solution is as follows:

[0005] A coating head with multiple coating modes, comprising a frame, a coating mechanism and a plurality of guide mechanisms, each of which is mounted on the frame and arranged in sequence from front to back, characterized in that: the guide mechanism is a liftable guide roller mechanism; the coating mechanism comprises a glue coating assembly, a first scraper assembly, a second scraper assembly, a glue scraping modification assembly and a liftable pressure roller assembly, the glue coating assembly comprises a glue storage tank, a glue coating roller and a glue coating motor, the glue storage tank and the glue coating motor are both mounted on the frame, the glue coating roller is rotatably mounted in the inner cavity of the glue storage tank and is drivingly connected to the output shaft of the glue coating motor, and the glue coating roller is located therein The first scraper assembly, the second scraper assembly, the glue scraping modification assembly, and the elevating pressure roller assembly are all installed on the frame, and the first scraper assembly and the second scraper assembly are respectively located at the front and rear sides of the glue coating roller and cooperate with the roller surface of the glue coating roller; the pressure roller in the elevating pressure roller assembly is parallel to the glue coating roller and is located directly above the glue coating roller; the glue scraping modification assembly is arranged between the other two elevating guide roller mechanisms adjacent to each other and is located behind the glue coating roller; the coating head switches the following four coating modes by selecting and controlling the glue coating roller and the glue scraping modification assembly:

[0006] Coating method (1) Anilox roller forward coating: The coating roller adopts anilox roller, which rotates forward under the drive of the coating motor and coats the substrate with glue from the glue storage tank in a forward direction. The pressure roller descends to press the substrate onto the coating roller and rotates forward with the coating roller. The scraping and modifying component adopts a scraping rod, which rotates forward under the drive of the drive motor to smooth the coating on the substrate.

[0007] Coating method (2) Anilox roller reverse coating: The coating roller adopts anilox roller, the pressure roller rises and separates from the coating roller, the coating roller rotates in the opposite direction under the drive of the coating motor and reversely coats the substrate with glue from the glue storage tank, the two liftable guide roller mechanisms adjacent to the coating roller are lowered, so that the bottom position of the guide roller in the liftable guide roller mechanism is lower than the top of the coating roller, the glue scraping and modifying component adopts a sealed scraper, and the sealed scraper is used to scrape the coating on the substrate flat;

[0008] Coating method (3) Smooth roller reverse coating: The gluing roller adopts a smooth roller, the pressure roller rises and separates from the gluing roller, the gluing roller rotates in the opposite direction under the drive of the gluing motor and reversely coats the substrate with glue from the glue storage tank, the two liftable guide roller mechanisms adjacent to the gluing roller descend, so that the bottom position of the guide roller in the liftable guide roller mechanism is lower than the top of the gluing roller, the scraping and modifying component adopts a malt stick, the malt stick rotates in the opposite direction under the drive of the drive motor, and a modification pattern is formed on the coating on the substrate;

[0009] Coating method (4) Reverse coating with micro-gravure roller: The glue coating roller is disabled, the pressure roller rises and separates from the glue coating roller, the glue scraping and modification component uses a micro-gravure roller, a glue receiving groove is provided below the micro-gravure roller, and the two liftable guide roller mechanisms of the micro-gravure roller are lowered so that the bottom position of the liftable guide roller mechanism is lower than the top of the micro-gravure roller, so that the substrate forms a wrap angle with the micro-gravure roller at the front and rear sides of the micro-gravure roller. The micro-gravure roller rotates in the opposite direction under the drive of the driving motor and reversely coats the substrate with glue from the glue receiving groove, thereby coating a layer of glue on the substrate.

[0010] In this specification, the front and rear refer to: along the conveying direction of the substrate, the first one to arrive is the front and the slowest one to arrive is the rear; the above-mentioned rotation in the same direction as the substrate conveying direction is the forward rotation, and the rotation opposite to the substrate conveying direction is the reverse rotation.

[0011] As a preferred solution of the present invention, the elevating pressure roller assembly comprises the pressure roller, the pressure roller seat and the pressure roller seat adjusting device for adjusting the height position of the pressure roller seat, the pressure roller seat adjusting device is installed on the frame, the pressure roller is rotatably installed on the pressure roller seat and is parallel to the glue coating roller, the pressure roller is located directly above the glue coating roller and cooperates with the glue coating roller. During operation, the height position of the pressure roller seat and the pressure roller can be raised by the pressure roller seat adjusting device to separate the pressure roller from the glue coating roller; the height position of the pressure roller seat and the pressure roller can also be lowered by the pressure roller seat adjusting device to make the pressure roller and the glue coating roller in a mutually pressed state.

[0012] As a preferred solution of the present invention, each of the liftable guide roller mechanisms comprises the guide roller, the guide roller seat and the guide roller seat adjusting device for adjusting the height position of the guide roller seat, the guide roller seat is mounted on the frame through the guide roller seat adjusting device, and the guide roller is rotatably mounted on the guide roller seat. During operation, the guide roller seat and the guide roller can be raised or lowered by the guide roller seat adjusting device, so that the guide roller contacts the surface of the substrate, thereby achieving tensioning and guiding of the substrate.

[0013] The above-mentioned guide roller seat adjustment device and pressure roller seat adjustment device can both adopt conventional height adjustment mechanisms, such as: screw mechanism, worm gear lifting mechanism, electric push rod, etc., whose structure and principle belong to the existing technology and will not be described in detail here.

[0014] As a preferred embodiment of the present invention, when the coating head adopts the coating method (1) of the anilox roller for forward coating, the selected scraping glue modification component includes a base, a rod holder, the scraping glue rod and a driving motor, the base is mounted on the frame, the rod holder is mounted on the base, a material receiving groove is provided on the top surface of the rod holder, the scraping glue rod can be rotatably mounted on the frame and is drivingly connected to the output shaft of the driving motor, and the scraping glue rod is located inside the material receiving groove. When working, the scraping glue rod rotates continuously under the drive of the driving motor to scrape the glue coated on the lower surface of the substrate flat, and the scraped glue is received by the material receiving groove of the rod holder to prevent it from falling onto the work surface and causing pollution.

[0015] As a preferred embodiment of the present invention, when the coating head adopts the coating method (2) of reverse coating with anilox roller, the selected scraping and modifying assembly includes a scraper seat and the sealing scraper, the scraper seat is fixedly mounted on the frame, the blade of the sealing scraper is mounted on the scraper seat, and the blade of the sealing scraper is arranged upward. When working, when the adhesive layer coated on the lower surface of the substrate passes through the upper side of the sealing scraper, the thickness becomes more uniform under the scraping of the blade of the sealing scraper.

[0016] As a preferred embodiment of the present invention, when the coating head adopts the coating method (3) of smooth roller reverse coating, the selected scraping and modifying component includes the malt stick and the driving motor, the driving motor is mounted on the frame, and the malt stick is rotatably mounted on the frame and is drivingly connected to the output shaft of the driving motor. When working, the malt stick rotates in the opposite direction under the drive of the driving motor, and a modification pattern is formed on the coating on the lower surface of the substrate passing through.

[0017] As a preferred embodiment of the present invention, when the coating head adopts the coating method (4) of reverse coating with a micro-gravure roller, the selected glue scraping modification component includes a micro-gravure roller, a glue receiving groove and a driving motor, the driving motor and the glue receiving groove are both mounted on the frame, the micro-gravure roller is rotatably mounted on the frame and is drivingly connected to the output shaft of the driving motor, and the lower part of the micro-gravure roller is immersed in the glue in the glue receiving groove. When working, the micro-gravure roller rotates in the opposite direction (that is, the rotation direction of the micro-gravure roller is opposite to the transmission direction of the substrate) under the drive of the driving motor and glues from the glue receiving groove, and a layer of glue is coated on the lower surface of the substrate passing through.

[0018] As a preferred embodiment of the present invention, the first scraper assembly includes a first cylinder, a first swing shaft, a first swing arm, two first knife seats and two first scrapers. The first swing shaft can be rotatably mounted on the frame and is parallel to the glue coating roller. The first end of the first swing arm is fixedly mounted on the first swing shaft. One end of the first cylinder is hinged to the frame, and the other end of the first cylinder is hinged to the second end of the first swing arm. The two first knife seats are mounted on the first swing shaft and are arranged side by side on the left and right. The two first scrapers are respectively mounted on the corresponding first knife seats and cooperate with the roller surface of the glue coating roller. When the coating head is switched to the coating mode (1) anilox roller forward coating, the first swing arm can be driven by the piston rod of the first cylinder to swing around the first swing axis, and the two first knife seats and the two first scrapers can be driven to swing through the first swing axis, so that the blades of the two first scrapers are close to the roller surface of the glue coating roller, and the two first scrapers are used to scrape off the glue on both ends of the roller surface of the rotating glue coating roller, leaving only glue on the middle part of the roller surface of the glue coating roller; when the coating head is switched to the coating mode (2) anilox roller forward coating, the coating mode (3) smooth roller reverse coating, and the coating mode (4) micro-gravure roller reverse coating, the first swing arm can be driven by the piston rod of the first cylinder to swing in the opposite direction around the first swing axis, and the two first knife seats and the two first scrapers can be driven to swing in the opposite direction through the first swing axis, so that the blades of the two first scrapers are away from the roller surface of the glue coating roller.

[0019] As a further preferred embodiment of the present invention, the first scraper assembly further comprises a blade holder adjusting device capable of adjusting the positions of the two first blade holders in the axial direction of the first swing shaft. Thus, the relative positions of the two first scrapers and the surface of the glue coating roller can be adjusted by adjusting the positions of the two first blade holders in the axial direction of the first swing shaft through the blade holder adjusting device.

[0020] As a further preferred embodiment of the present invention, the two first tool seats are both mounted on the middle part of the first swing shaft and can slide along the axial direction of the first swing shaft; the tool seat adjustment device includes two tool seat adjustment components, the two tool seat adjustment components correspond to the two first tool seats one by one, the tool seat adjustment component includes a fixed seat, an adjustment screw and an adjustment hand wheel, the fixed seat is fixedly mounted on the first swing shaft, the middle part of the adjustment screw can be rotatably mounted on the fixed seat and its direction is consistent with the axial direction of the first swing shaft, the corresponding first tool seat is provided with a threaded hole, the first end of the adjustment screw is in the threaded hole and meshed with the threaded hole, and the adjustment hand wheel is fixedly mounted on the second end of the adjustment screw. With this structure, the adjustment screw can be rotated by rotating the adjustment hand wheels of the two tool seat adjustment components, and the meshing relationship between the first end of the adjustment screw and the threaded hole on the first tool seat can be used to drive the corresponding first tool seats to move along the axial direction of the first swing shaft, so as to adjust the positions of the two first tool seats and the first scrapers thereon in the axial direction of the first swing shaft.

[0021] As a preferred solution of the present invention, the second scraper assembly includes a lifting seat, a lifting seat lifting mechanism for driving the lifting seat to lift, a second swing shaft, a second cylinder, a second swing arm, a second knife seat and a second scraper. The lifting seat lifting mechanism is installed on the frame, both ends of the second swing shaft are rotatably installed on the lifting seat, the first end of the second swing arm is fixedly installed on the second swing shaft, one end of the second cylinder is hinged to the lifting seat, and the other end of the second cylinder is hinged to the second end of the second swing arm; the second knife seat is fixedly installed on the second swing shaft, and the second scraper is installed on the second knife seat and cooperates with the roller surface of the glue coating roller. When installing the second scraper assembly, the height positions of the lifting seat and the second swing shaft, the second knife seat and the second scraper thereon can be adjusted by the lifting mechanism of the lifting seat, so that the second scraper is located at the rear side of the glue coating roller, and then the second swing arm is driven to swing around the second swing shaft by the second cylinder, and the second knife seat and the second scraper are driven to swing by the second swing shaft, so that the blade of the second scraper is close to the roller surface of the glue coating roller, and the second scraper is used to scrape off the excess glue on the glue coating roller, so as to form a thin and uniform layer of glue on the roller surface of the glue coating roller.

[0022] The lifting mechanism of the lifting seat can adopt a conventional height adjustment mechanism, such as a worm gear lifting mechanism, an electric push rod, etc. Its structure and principle belong to the prior art and will not be described in detail here.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] This coating head integrates multiple coating methods into one, can realize switching between different coating methods, and is easy to flexibly adjust the coating thickness, which can meet the different coating requirements of different coating products on substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a coating head according to a preferred embodiment of the present invention.

[0026] Figure 2 It is a schematic structural diagram of a glue coating component in a preferred embodiment of the present invention.

[0027] Figure 3 yes Figure 1 The coating head shown is a schematic diagram of the state when the coating method (1) anilox roller is coating in the forward direction.

[0028] Figure 4 yes Figure 1 The coating head shown is a schematic diagram of the structure of the scraper modification component selected when the coating method (1) anilox roller is forward coated.

[0029] Figure 5 yes Figure 4 AA section view.

[0030] Figure 6 yes Figure 1 The coating head shown is a schematic diagram of the state when the coating method (2) anilox roller is reversely coated.

[0031] Figure 7 yes Figure 1 The coating head shown is a schematic diagram of the state when the coating method (3) is reverse coating with a smooth roller.

[0032] Figure 8 yes Figure 1 The coating head shown is a schematic diagram of the state when the coating method (4) micro-gravure roller is reversely coated.

[0033] Fig. 9 It is a schematic structural diagram of the first scraper assembly in a preferred embodiment of the present invention.

[0034] Fig.10 yes Fig.10 Top view of the .

[0035] Fig.11 It is a schematic structural diagram of the second scraper assembly in a preferred embodiment of the present invention.

[0036] Fig.12 yes Fig.11 Stereoscopic diagram. DETAILED DESCRIPTION

[0037] like Figure 1-Figure 12As shown, the coating head with multiple coating modes includes a frame 1, a coating mechanism 2 and a plurality of liftable guide roller mechanisms 3, each of which is mounted on the frame 1 and arranged in sequence from front to back; the coating mechanism 2 includes a glue coating component 21, a first scraper component 22, a second scraper component 23, a glue scraping modification component 24 and a liftable pressure roller component 25, the glue coating component 21 includes a glue storage tank 211, a glue coating roller 212 and a glue coating motor 213, the glue storage tank 211 and the glue coating motor 213 are all mounted on the frame 1, the glue coating roller 212 is rotatably mounted in the inner cavity of the glue storage tank 211 and is drivingly connected to the output shaft of the glue coating motor 213, and the glue coating roller 212 is located adjacent to each other in front and back. The first scraper assembly 22, the second scraper assembly 23, the glue scraping and modifying assembly 24 and the elevating pressure roller assembly 25 are all installed on the frame 1. The first scraper assembly 22 and the second scraper assembly 23 are respectively located at the front and rear sides of the glue coating roller 212 and cooperate with the roller surface of the glue coating roller 212. The pressure roller 251 in the elevating pressure roller assembly 25 is parallel to the glue coating roller 212 and is located directly above the glue coating roller 212. The glue scraping and modifying assembly 24 is arranged between the other two elevating guide roller mechanisms 3 adjacent to each other and is located behind the glue coating roller 212. The coating head switches the following four coating modes by selecting and controlling the glue coating roller 212 and the glue scraping and modifying assembly 24:

[0038] Coating method (1) Anilox roller forward coating: The glue coating roller 212 adopts anilox roller, which rotates forward under the drive of glue coating motor 213 and coats the substrate 200 with glue from glue storage tank 211 in a forward direction, the pressing roller 251 descends to press the substrate 200 onto the glue coating roller 212 and rotates forward with the glue coating roller 212, the glue scraping modification component 24 adopts glue scraping rod 2411, which rotates forward under the drive of driving motor to smooth the coating on the substrate 200;

[0039] Coating method (2) reverse coating with anilox roller: the glue coating roller 212 is an anilox roller, the pressure roller 251 rises and separates from the glue coating roller 212, the glue coating roller 212 rotates in the opposite direction under the drive of the glue coating motor 213 and reversely coats the substrate 200 with glue from the glue storage tank 211, the two liftable guide roller mechanisms 3 adjacent to the glue coating roller 212 are lowered, so that the bottom position of the guide roller 31 in the liftable guide roller mechanism 3 is lower than the top of the glue coating roller 212, the glue scraping and modifying component 24 uses a sealing scraper 2421, and the sealing scraper 2421 scrapes the coating on the substrate 200 flat;

[0040] Coating method (3) Smooth roller reverse coating: The glue coating roller 212 is a smooth roller, the pressure roller 251 rises and separates from the glue coating roller 212, the glue coating roller 212 rotates in the reverse direction under the drive of the glue coating motor 213 and reversely coats the substrate 200 with glue from the glue storage tank 211, the two liftable guide roller mechanisms 3 adjacent to the glue coating roller 212 are lowered, so that the bottom position of the guide roller 31 in the liftable guide roller mechanism 3 is lower than the top of the glue coating roller 212, the glue scraping modification component 24 uses a malt stick 2431, the malt stick 2431 rotates in the reverse direction under the drive of the drive motor, and a modification pattern is formed on the coating on the substrate 200;

[0041] Coating method (4) Reverse coating with micro-gravure roller 2441: The glue coating roller 212 is disabled, the pressure roller 251 rises and separates from the glue coating roller 212, the glue scraping modification component 24 adopts the micro-gravure roller 2441, a glue receiving groove 2442 is provided below the micro-gravure roller 2441, and the two liftable guide roller mechanisms 3 of the micro-gravure roller 2441 are lowered so that the bottom position of the liftable guide roller mechanism 3 is lower than the top of the micro-gravure roller 2441, so that the substrate 200 forms a wrap angle with the micro-gravure roller 2441 at the front and rear sides of the micro-gravure roller 2441, and the micro-gravure roller 2441 is driven by the driving motor to rotate in the reverse direction and the glue from the glue receiving groove 2442 is reversely coated on the substrate 200, thereby coating a layer of glue on the substrate 200.

[0042] In this embodiment, the elevating pressure roller assembly 25 comprises a pressure roller 251, a pressure roller seat 252 and a pressure roller seat adjusting device 253 for adjusting the height position of the pressure roller seat 252. The pressure roller seat adjusting device 253 is installed on the frame 1. The pressure roller 251 is rotatably installed on the pressure roller seat 252 and is parallel to the glue coating roller 212. The pressure roller 251 is located directly above the glue coating roller 212 and cooperates with the glue coating roller 212. During operation, the height positions of the pressure roller seat 252 and the pressure roller 251 can be raised by the pressure roller seat adjusting device 253 to separate the pressure roller 251 from the glue coating roller 212; the height positions of the pressure roller seat 252 and the pressure roller 251 can also be lowered by the pressure roller seat adjusting device 253 to make the pressure roller 251 and the glue coating roller 212 in a mutually pressed state.

[0043] In this embodiment, each elevating guide roller mechanism 3 includes a guide roller 31, a guide roller seat 32, and a guide roller seat adjusting device 33 for adjusting the height position of the guide roller seat 32. The guide roller seat 32 is mounted on the frame 1 through the guide roller seat adjusting device 33, and the guide roller 31 is rotatably mounted on the guide roller seat 32. During operation, the guide roller seat 32 and the guide roller 31 can be raised or lowered through the guide roller seat adjusting device 33, so that the guide roller 31 contacts the surface of the substrate 200, thereby achieving tensioning and guiding of the substrate 200.

[0044] refer to Figure 4-Figure 5In this embodiment, when the coating head adopts coating method (1) anilox roller forward coating, the selected glue scraping modification component 24 includes a driving motor 2410, a glue scraping rod 2411, a base 2412 and a rod holder 2413. The base 2412 is mounted on the frame 1, and the rod holder 2413 is mounted on the base 2412. A material receiving groove 24130 is provided on the top surface of the rod holder 2413. The glue scraping rod 2411 is rotatably mounted on the frame 1 and is drivingly connected to the output shaft of the driving motor 2410. The glue scraping rod 2411 is located inside the material receiving groove 24130. When working, the glue scraping rod 2411 rotates continuously under the drive of the driving motor 2410 to scrape the glue coated on the lower surface of the substrate 200 flat. The scraped glue is received by the material receiving groove 24130 of the rod holder 2413 to prevent it from falling onto the work surface and causing pollution.

[0045] refer to Figure 6 In this embodiment, when the coating head adopts coating method (2) anilox roller reverse coating, the selected scraping and modifying assembly 24 includes a sealing scraper 2421 and a scraper seat 2422. The scraper seat 2422 is fixedly mounted on the frame 1, and the sealing scraper 2421 is mounted on the scraper seat 2422. The blade of the sealing scraper 2421 is set upward. When working, the adhesive layer coated on the lower surface of the substrate 200 passes through the upper side of the sealing scraper 2421, and the thickness becomes more uniform under the scraping of the blade of the sealing scraper 2421.

[0046] refer to Figure 7 In this embodiment, when the coating head adopts coating method (3) smooth roller reverse coating, the selected scraping glue modification component 24 includes a driving motor (not shown) and a malt stick 2431, the driving motor is mounted on the frame 1, and the malt stick 2431 is rotatably mounted on the frame 1 and is connected to the output shaft of the driving motor. When working, the malt stick 2431 rotates in the opposite direction under the drive of the driving motor, and forms a modification pattern on the coating on the lower surface of the substrate 200 passing by.

[0047] refer to Figure 8 In this embodiment, when the coating head adopts coating method (4) and the micro gravure roller 2441 is reversely coated, the selected scraping glue modification component 24 includes a driving motor, a micro gravure roller 2441 and a glue receiving groove 2442. The driving motor and the glue receiving groove 2442 are both mounted on the frame 1. The micro gravure roller 2441 is rotatably mounted on the frame 1 and is connected to the output shaft of the driving motor by transmission. The lower part of the micro gravure roller 2441 is immersed in the glue in the glue receiving groove 2442. When working, the micro gravure roller 2441 rotates in the opposite direction under the drive of the driving motor (that is, the rotation direction of the micro gravure roller 2441 is opposite to the transmission direction of the substrate 200) and glues from the glue receiving groove 2442, and a layer of glue is coated on the lower surface of the substrate 200 passing through.

[0048] refer to Figure 9-10In this embodiment, the first scraper assembly 22 includes a first cylinder 221, a first swing shaft 222, a first swing arm 223, two first knife seats 224, two first scrapers 225 and two knife seat adjustment assemblies 226. The first swing shaft 222 can be rotatably mounted on the frame 1 and is parallel to the glue coating roller 212. The first end of the first swing arm 223 is fixedly mounted on the first swing shaft 222. One end of the first cylinder 221 is hinged to the frame 1, and the other end of the first cylinder 221 is hinged to the second end of the first swing arm 223. The two first knife seats 224 are mounted on the middle part of the first swing shaft 222 and can slide along the axial direction of the first swing shaft 222. The two first scrapers 225 are respectively mounted on the corresponding first The two tool holder adjustment assemblies 226 correspond one to one with the two first tool holders 224. The tool holder adjustment assemblies 226 include a fixed seat 2261, an adjusting screw 2262 and an adjusting hand wheel 2263. The fixed seat 2261 is fixedly mounted on the first swing shaft 222. The middle part of the adjusting screw 2262 is rotatably mounted on the fixed seat 2261 and its direction is consistent with the axial direction of the first swing shaft 222. The corresponding first tool holder 224 is provided with a threaded hole 2241. The first end of the adjusting screw 2262 is in the threaded hole 2241 and meshes with the threaded hole 2241. The adjusting hand wheel 2263 is fixedly mounted on the second end of the adjusting screw 2262. When the coating head is switched to coating mode (1) anilox roller forward coating, the first cylinder 221 can drive the first swing arm 223 to swing around the first swing shaft 222, and the first swing shaft 222 can drive the two first knife seats 224 and the two first scrapers 225 to swing, so that the blades of the two first scrapers 225 are close to the roller surface of the glue coating roller 212, and the two first scrapers 225 are used to scrape off the glue on both ends of the roller surface of the rotating glue coating roller 212, leaving only the glue on the middle part of the roller surface of the glue coating roller 212. Glue is applied; when the coating head is switched to coating mode (2) anilox roller forward coating, coating mode (3) smooth roller reverse coating, and coating mode (4) micro-gravure roller 2441 reverse coating, the first swing arm 223 can be driven by the piston rod of the first cylinder 221 to swing in the opposite direction around the first swing shaft 222, and the two first knife seats 224 and the two first scrapers 225 can be driven to swing in the opposite direction through the first swing shaft 222, so that the blades of the two first scrapers 225 are away from the roller surface of the glue coating roller 212. When it is necessary to adjust the distance between the two first scrapers, the adjusting handwheel 2263 of the two knife holder adjustment assemblies 226 can be rotated to rotate the adjusting screw 2262, and the meshing relationship between the first end of the adjusting screw 2262 and the threaded hole 2241 on the first knife holder 224 can be used to drive the corresponding first knife holder 224 to move axially along the first swing shaft 222, so as to adjust the axial positions of the two first knife holders 224 and the first scrapers 225 thereon on the first swing shaft 222, and to adjust the relative positions of the two first scrapers 225 and the roller surface of the glue coating roller 212.

[0049] refer to Figure 11-Figure 12 In this embodiment, the second scraper assembly 23 includes a lifting seat 231, a lifting seat lifting mechanism 232 for driving the lifting seat 231 to lift and lower, a second swing shaft 233, a second cylinder 234, a second swing arm 235, a second knife seat 236 and a second scraper 237. The lifting seat lifting mechanism 232 is installed on the frame 1, and both ends of the second swing shaft 233 can be rotatably installed on the lifting seat 231. The first end of the second swing arm 235 is fixedly installed on the second swing shaft 233. One end of the second cylinder 234 is hinged to the lifting seat 231, and the other end of the second cylinder 234 is hinged to the second end of the second swing arm 235; the second knife seat 236 is fixedly installed on the second swing shaft 233, and the second scraper 237 is installed on the second knife seat 236 and cooperates with the roller surface of the glue coating roller 212. When installing the second scraper assembly 23, the height positions of the lifting seat 231 and the second swing shaft 233, the second knife seat 236 and the second scraper 237 thereon can be adjusted by the lifting seat lifting mechanism 232, so that the second scraper 237 is located at the rear side of the glue coating roller 212, and then the second swing arm 235 is driven to swing around the second swing shaft 233 by the second cylinder 234, and the second knife seat 236 and the second scraper 237 are driven to swing by the second swing shaft 233, so that the blade of the second scraper 237 is close to the roller surface of the glue coating roller 212, and the second scraper 237 is used to scrape off the excess glue on the glue coating roller 212, so as to form a thin and uniform layer of glue on the roller surface of the glue coating roller 212.

[0050] The following is a brief description of the working principle of this coating head when using the following four coating methods:

[0051] Before the coating head starts working, the substrate 200 can be passed from the lower side of the guide roller 31 of each liftable guide roller mechanism 3, between the glue coating roller 212 and the pressure roller 251, and the upper side of the glue scraping modification component 24 in sequence from front to back.

[0052] When the coating head is required to adopt coating method (1) anilox roller forward coating, the glue coating roller 212 adopts an anilox roller, and the glue scraping modification component 24 adopts a glue scraping rod 2411. The glue scraping rod 2411 plays the role of a smoothing roller. The height position of the pressure roller seat 252 and the pressure roller 251 is lowered by the pressure roller seat adjustment device 253, so that the pressure roller 251 and the glue coating roller 212 are in a mutually pressed state. There is no special requirement for the liftable guide roller mechanism 3, as long as it can guide the substrate 200. At this time, the substrate 200 is in contact with the top of the glue coating roller 212, the top of the glue scraping rod 2411 and the bottom of the corresponding guide rollers 31; when working, the glue coating roller 212 is moved by the glue coating motor 21 3, the glue coating roller 212 rotates forward (that is, the rotation direction of the glue coating roller 212 is consistent with the transmission direction of the substrate 200), and drives the pressure roller 251 to rotate in the same direction, the glue coating roller 212 takes up the glue in the glue storage tank 211, and uses the first scraper assembly 22 to scrape off the glue on both ends of the roller surface of the glue coating roller 212, leaving only the glue on the middle of the roller surface of the glue coating roller 212, and then the glue coating roller 212 transfers the glue to the lower surface of the substrate 200 at the corresponding position on the pressure roller 251; finally, the glue coating rod 2411 (smoothing roller) smoothes the glue coated on the lower surface of the substrate 200. Of course, a receiving groove 24130 should be provided below the glue coating rod 2411 to receive the scraped glue.

[0053] When the coating head is required to adopt coating method (2) anilox roller reverse coating, the coating roller 212 is selected as an anilox roller, the glue scraping modification component 24 is selected as a sealing scraper 2421, and the height position of the pressure roller seat 252 and the pressure roller 251 is raised by the pressure roller seat adjustment device 253 to separate the pressure roller 251 from the coating roller 212, and the guide roller seat adjustment device 33 of the two liftable guide roller mechanisms 3 adjacent to the coating roller 212 is used to lower the corresponding guide roller seats 32 and guide rollers 31 so that the bottom positions of the two guide rollers 31 are lower than the top of the coating roller 212. At this time, the substrate 200 is in contact with the top of the coating roller 212, the bottom of the guide roller 31 in the two liftable guide roller mechanisms 3 adjacent to the coating roller 212, and the sealing scraper 2421, and the guide roller 31 in the two liftable guide roller mechanisms 3 adjacent to the coating roller 212 can move the substrate 200 is tensioned and wrapped around the top of the glue coating roller 212, that is, the substrate 200 forms a wrap angle with the glue coating roller 212 on the front and rear sides of the glue coating roller 212; when working, the glue coating roller 212 rotates in the opposite direction under the drive of the glue coating motor 213 (that is, the rotation direction of the glue coating roller 212 is opposite to the transmission direction of the substrate 200), the glue coating roller 212 takes up the glue in the glue storage tank 211, and uses the second scraper assembly 23 to scrape off the excess glue on the glue coating roller 212, forming a thin and uniform layer of glue on the roller surface of the glue coating roller 212. Since the rotation direction of the glue coating roller 212 is opposite to the transmission direction of the substrate 200, the glue coating roller 212 can apply a thicker glue layer on the lower surface of the substrate 200; finally, the glue layer coated on the lower surface of the substrate 200 becomes more uniform under the scraping of the sealing scraper 2421.

[0054] When the coating head is required to adopt coating method (3) smooth roller reverse coating, the gluing roller 212 is selected as a smooth roller, and the height positions of the pressure roller seat 252 and the pressure roller 251 are raised by the pressure roller seat adjustment device 253 to separate the pressure roller 251 from the gluing roller 212, and the guide roller seat adjustment device 33 of the two liftable guide roller mechanisms 3 adjacent to the gluing roller 212 and the scraping glue modification component 24 is used to lower the corresponding guide roller seats 32 and guide rollers 31, so that the bottom positions of these guide rollers 31 are lower than the top of the gluing roller 212 and the top of the scraping glue modification component 24, and the scraping glue modification component 24 is selected from the malt stick 2431, and the malt stick 2431 is connected to the power output shaft of the driving motor. At this time, the substrate 200 contacts and cooperates with the top of the smooth roller, the bottom of the guide roller 31 in the two liftable guide roller mechanisms 3 adjacent to it, and the malt stick 2431. At this time, the guide roller 31 in the two liftable guide roller mechanisms 3 adjacent to the gluing roller 212 can be The substrate 200 is stretched and wrapped around the top of the glue roller 212 and the malt stick 2431, that is, the substrate 200 forms a wrap angle with the glue roller 212 and the malt stick 2431 at the front and back sides; when working, the glue roller 212 rotates in the opposite direction under the drive of the glue motor 213 (that is, the rotation direction of the glue roller 212 is opposite to the transmission direction of the substrate 200), and the glue roller 212 takes up the glue in the glue storage tank 211 and uses the first The second scraper assembly 23 scrapes off the excess glue on the glue coating roller 212, forming a thin and uniform layer of glue on the roller surface of the glue coating roller 212. Since the rotation direction of the glue coating roller 212 is opposite to the transmission direction of the substrate 200, the glue coating roller 212 can apply a thicker glue layer on the lower surface of the substrate 200; finally, the malt stick 2431 rotates in the opposite direction driven by the driving motor, forming a modified pattern on the coating on the lower surface of the passing substrate 200.

[0055] When the coating head is required to adopt coating method (4) micro-gravure roller 2441 for reverse coating, the height position of the pressure roller seat 252 and the pressure roller 251 is raised by the pressure roller seat adjustment device 253, so that the pressure roller 251 is separated from the glue coating roller 212, and the glue coating roller 212 is disabled, that is, the substrate 200 passes between the glue coating roller 212 and the pressure roller 251 but does not contact the glue coating roller 212 and the pressure roller 251; the micro-gravure roller 2441 is selected as the scraper modification component 24, and the micro-gravure roller 2441 is connected to the power output shaft of a driving motor, and the guide roller seat adjustment device 33 of the two liftable guide roller mechanisms 3 adjacent to the micro-gravure roller 2441 lowers the corresponding guide roller seat 32 and guide roller 31, so that the top position of the micro-gravure roller 2441 is higher than the two guide rollers adjacent to it. 31, at this time, the substrate 200 contacts and cooperates with the top of the micro gravure roller 2441 and the bottom of the guide roller 31 in the two liftable guide roller mechanisms 3 adjacent to the front and rear of the micro gravure roller 2441, and the guide rollers 31 in the two liftable guide roller mechanisms 3 adjacent to the front and rear of the micro gravure roller 2441 can tension the substrate 200 and wrap it around the top of the micro gravure roller 2441, that is, the substrate 200 forms a wrap angle with the micro gravure roller 2441 at the front and rear sides of the micro gravure roller 2441, and the substrate 200 is separated from the glue coating roller 212 and the pressure roller 251; when working, the micro gravure roller 2441 rotates in the opposite direction (that is, the rotation direction of the micro gravure roller 2441 is opposite to the transmission direction of the substrate 200) driven by the driving motor, and glues from the glue bearing groove 2442, and a layer of glue is coated on the lower surface of the substrate 200 passing through.

[0056] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles of the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A coating head with multiple coating modes, comprising a frame, a coating mechanism and a plurality of guide mechanisms, wherein each guide mechanism is mounted on the frame and arranged in sequence from front to back, characterized in that: The guiding mechanism is a liftable guide roller mechanism; the coating mechanism includes a glue coating assembly, a first scraper assembly, a second scraper assembly, a glue scraping modification assembly and a liftable pressure roller assembly; the glue coating assembly includes a glue storage tank, a glue coating roller and a glue coating motor; the glue storage tank and the glue coating motor are both mounted on a frame; the glue coating roller is rotatably mounted in the inner cavity of the glue storage tank and is drivingly connected to the output shaft of the glue coating motor; the glue coating roller is located between two liftable guide roller mechanisms adjacent to each other in front and back; the first scraper assembly, the second scraper assembly, the glue scraping modification assembly and the liftable pressure roller assembly are all mounted on the frame; the first scraper assembly and the second scraper assembly are respectively located at the front and rear sides of the glue coating roller; the first scraper assembly includes a first cylinder, a first swing A movable shaft, a first swing arm, two first knife seats and two first scrapers, the first swing shaft can be rotatably mounted on the frame and is parallel to the glue coating roller, the first end of the first swing arm is fixedly mounted on the first swing shaft, one end of the first cylinder is hinged to the frame, and the other end of the first cylinder is hinged to the second end of the first swing arm; the two first knife seats are mounted on the first swing shaft and arranged side by side on the left and right, and the two first scrapers are respectively mounted on the corresponding first knife seats and cooperate with the roller surface of the glue coating roller; the first scraper assembly also includes a knife seat adjustment device capable of adjusting the position of the two first knife seats in the axial direction of the first swing shaft, the two first knife seats are both mounted on the middle part of the first swing shaft and can be adjusted along the axial direction of the first swing shaft The tool holder adjustment device includes two tool holder adjustment components, and the two tool holder adjustment components correspond to the two first tool holders one by one. The tool holder adjustment component includes a fixed seat, an adjusting screw and an adjusting hand wheel. The fixed seat is fixedly mounted on the first swing shaft. The middle part of the adjusting screw can be rotatably mounted on the fixed seat and its direction is consistent with the axial direction of the first swing shaft. The corresponding first tool holder is provided with a threaded hole. The first end of the adjusting screw is in the threaded hole and meshed with the threaded hole. The adjusting hand wheel is fixedly mounted on the second end of the adjusting screw. The second scraper assembly includes a lifting seat, a lifting seat lifting mechanism for driving the lifting seat to lift, a second swing shaft, a second cylinder, a second swing arm, a second tool holder and a second scraper. The lowering seat lifting mechanism is installed on the frame, the two ends of the second swing shaft are rotatably installed on the lifting seat, the first end of the second swing arm is fixedly installed on the second swing shaft, one end of the second cylinder is hinged to the lifting seat, and the other end of the second cylinder is hinged to the second end of the second swing arm; the second knife seat is fixedly installed on the second swing shaft, the second scraper is installed on the second knife seat and cooperates with the roller surface of the glue coating roller; the pressure roller in the liftable pressure roller assembly is parallel to the glue coating roller and is located directly above the glue coating roller; the scraping glue modification assembly is arranged between the other two liftable guide roller mechanisms adjacent to each other and is located behind the glue coating roller; the coating head switches the following four coating modes by selecting and controlling the glue coating roller and the scraping glue modification assembly: Coating method (1) Anilox roller forward coating: The coating roller adopts anilox roller, which rotates forward under the drive of the coating motor and coats the substrate with glue from the glue storage tank in a forward direction. The pressure roller descends to press the substrate onto the coating roller and rotates forward with the coating roller. The scraping and modifying component adopts a scraping rod, which rotates forward under the drive of the drive motor to smooth the coating on the substrate. Coating method (2) Anilox roller reverse coating: The coating roller adopts anilox roller, the pressure roller rises and separates from the coating roller, the coating roller rotates in the opposite direction under the drive of the coating motor and reversely coats the substrate with glue from the glue storage tank, the two liftable guide roller mechanisms adjacent to the coating roller are lowered, so that the bottom position of the guide roller in the liftable guide roller mechanism is lower than the top of the coating roller, the glue scraping and modifying component adopts a sealed scraper, and the sealed scraper is used to scrape the coating on the substrate flat; Coating method (3) Smooth roller reverse coating: The gluing roller adopts a smooth roller, the pressure roller rises and separates from the gluing roller, the gluing roller rotates in the opposite direction under the drive of the gluing motor and reversely coats the substrate with glue from the glue storage tank, the two liftable guide roller mechanisms adjacent to the gluing roller descend, so that the bottom position of the guide roller in the liftable guide roller mechanism is lower than the top of the gluing roller, the scraping and modifying component adopts a malt stick, the malt stick rotates in the opposite direction under the drive of the drive motor, and a modification pattern is formed on the coating on the substrate; Coating method (4) Reverse coating with micro-gravure roller: The glue coating roller is disabled, the pressure roller rises and separates from the glue coating roller, the glue scraping and modification component uses a micro-gravure roller, a glue receiving groove is provided below the micro-gravure roller, and the two liftable guide roller mechanisms of the micro-gravure roller are lowered so that the bottom position of the liftable guide roller mechanism is lower than the top of the micro-gravure roller, so that the substrate forms a wrap angle with the micro-gravure roller at the front and rear sides of the micro-gravure roller. The micro-gravure roller rotates in the opposite direction under the drive of the driving motor and reversely coats the substrate with glue from the glue receiving groove, thereby coating a layer of glue on the substrate.

2. A coating head with multiple coating modes according to claim 1, characterized in that: The liftable pressure roller assembly includes the pressure roller, a pressure roller seat and a pressure roller seat adjusting device for adjusting the height position of the pressure roller seat. The pressure roller seat adjusting device is installed on the frame. The pressure roller is rotatably installed on the pressure roller seat and is parallel to the glue coating roller. The pressure roller is located directly above the glue coating roller and cooperates with the glue coating roller.

3. A coating head with multiple coating modes according to claim 1, characterized in that: Each of the liftable guide roller mechanisms comprises the guide roller, the guide roller seat and a guide roller seat adjusting device for adjusting the height position of the guide roller seat. The guide roller seat is installed on the frame through the guide roller seat adjusting device, and the guide roller is rotatably installed on the guide roller seat.

4. A coating head with multiple coating modes according to claim 1, characterized in that: When the coating head adopts the coating method (1) of the anilox roller for forward coating, the selected scraper modification component includes a base, a rod seat, the scraper rod and a drive motor, the base is mounted on the frame, the rod seat is mounted on the base, a material receiving groove is provided on the top surface of the rod seat, the scraper rod can be rotatably mounted on the frame and is drivingly connected to the output shaft of the drive motor, and the scraper rod is located on the inner side of the material receiving groove.

5. The coating head with multiple coating modes according to claim 1, characterized in that: When the coating head adopts the coating method (2) of reverse coating with anilox roller, the selected scraping and modifying component includes a scraper seat and a sealing scraper, the scraper seat is fixedly mounted on the frame, the blade of the sealing scraper is mounted on the scraper seat, and the blade of the sealing scraper is arranged to face upward.

6. A coating head with multiple coating modes according to claim 1, characterized in that: When the coating head adopts the coating method (3) of smooth roller reverse coating, the selected scraping and modifying component includes the malt stick and the driving motor, the driving motor is installed on the frame, and the malt stick can be rotatably installed on the frame and is drivingly connected to the output shaft of the driving motor.

7. A coating head with multiple coating modes according to claim 1, characterized in that: When the coating head adopts the coating method (4) of reverse coating with a micro-gravure roller, the selected glue scraping modification component includes a micro-gravure roller, a glue receiving groove and a driving motor. The driving motor and the glue receiving groove are both installed on the frame. The micro-gravure roller can be rotatably installed on the frame and is connected to the output shaft of the driving motor. The lower part of the micro-gravure roller is immersed in the glue in the glue receiving groove.

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