Packaging bag fixed point coating machine

Abstract

The invention relates to a fixed-point coating machine for packaging bags, comprising a feeding system, a mesh roller system, a rubber roller and a mesh roller scraping system. The feeding system supplies anti-fog coating liquid to the mesh roller system. The mesh roller system has a plurality of coating modules with adjustable depths arranged along the axial direction of the mesh roller system, so that the coating module depth at the coating position is the largest, and the depths of the remaining coating modules are zero, so that a depth for accommodating the anti-fog coating liquid is formed on the coating module at the coating position. The mesh roller system comprises a fixing frame, an anilox roller, a plurality of depth control sheets and a depth control device. The anti-fog coating liquid on the coating module at the coating position is not scraped off, while the anti-fog coating liquid at the remaining positions on the mesh roller system is scraped off, so as to control the coating position. The packaging bag completes fixed-point coating between the mesh roller system and the rubber roller, and the coating position in the axial direction of the anilox roller can be changed, thereby having flexible production capacity.

Description

[0001] This application is a divisional application of a patent application for invention titled "Production Process for Easy-to-Release Packaging Bags with Fixed-Point Anti-fog Function". The application date of the original application is 2022-2-16, and the application number is 2022101427598. Technical Field

[0002] The invention relates to the technical field of packaging bag production, in particular to a packaging bag fixed-point coating machine. Background Art

[0003] Many foods need to be stored in refrigerators. Due to the temperature difference in the packaging bag, the packaging bag is prone to fogging, making it impossible to observe the quality of the food in the bag, which affects consumers' choices. Anti-fog coatings have already appeared. Existing coating devices generally include anilox rollers and rubber rollers that are relatively set. The material of the anilox roller is generally a hard material such as metal, and the rubber roller is generally made of a soft material such as rubber. When coating, the anti-fog coating liquid is distributed on the surface of the anilox roller to complete the coating. However, the position of the anilox roller on the existing anilox roller is fixed. If the coating position in the axial direction of the anilox roller is to be changed, the anilox roller can only be purchased again, which greatly increases the cost. The coating process is not flexible and cannot meet the needs of flexible production.

[0004] The prior art has already provided solutions for changing the coating position or coating amount, such as by realizing differential transmission between the coating roller, the anilox roller and the glue roller, so that the coating amount can be slightly adjusted; or by adjusting the rotation angle of the glue coating roller and / or the traction roller to keep the glue coating point consistent with the printed pattern. The above-mentioned processing can be performed at any time during the normal operation of the coater to keep the glue coating point consistent with the printed pattern to ensure that there is no deviation in the position of the glue coating on the substrate; or by adjusting the rotation speed of the coating steel roller in real time according to the instructions of the PLC programming controller to change the phase angle of the coating anilox surface area during coating, so that the image and text of the coating steel roller coincide with the pre-printed image and text of the substrate, thereby achieving precise positioning and registration coating.

[0005] However, there is no solution for adjusting the coating position along the axial direction of the anilox roller, and the coating position in the axial direction of the anilox roller cannot be changed only by adjusting the phase angle of the anilox roller. Summary of the invention

[0006] In order to overcome the technical defects of the prior art, the present invention provides a fixed-point coating machine for packaging bags, which can change the coating position in the axial direction of the anilox roller and has flexible production capabilities.

[0007] The technical solution adopted by the present invention is:

[0008] The fixed-point coating machine for packaging bags comprises a feeding system, an anilox roller system, a photoelectric eye sensing system, a PLC programming controller, a rubber roller and an anilox roller scraping system. The feeding system supplies anti-fog coating liquid to the anilox roller system. The anilox roller system has a plurality of coating modules with adjustable depths arranged along the axial direction of the anilox roller system. The photoelectric eye sensing system irradiates a preset cursor position of the packaging bag and outputs relevant position information to the PLC programming controller. The depth of each coating module is adjusted according to the position of the cursor sensed by the photoelectric sensing system, so that the coating module at the coating position has the maximum depth and the depth of the remaining coating modules is zero. The anilox roller system comprises a fixing frame, an anilox roller, a plurality of depth control sheets and a depth control device. The anilox roller is a hollow structure and The anilox roller is provided with an anilox hole area composed of a plurality of mesh holes, the anilox roller is rotatably mounted on a fixed frame, each of the depth control sheets is provided with an adjustment column extending into each mesh hole, a deformation layer is provided on the side of the depth control sheet close to the anilox hole area, an elastic fixing layer for fixing the depth control sheet is provided on the innermost side of the anilox roller, the depth control device is installed in the anilox roller, each of the depth control devices is fixed on a fixed frame and has a plurality of extrusion ends for extruding the elastic fixing layer, each of the extrusion ends is arranged corresponding to each depth control sheet, the anilox roller scraping system is installed on the upper side of the extrusion end; the anilox roller scraping system scrapes off excess anti-fog coating liquid on the anilox roller system; the packaging bag is point-coated through the anilox roller system and the rubber roller.

[0009] Preferably, the feeding system includes a wetting roller and a liquid storage tank, the liquid storage tank stores anti-fog coating liquid, the wetting roller is rotatably installed in the liquid storage tank, the wetting roller is partially immersed in the anti-fog coating liquid in the liquid storage tank and is rotationally contacted with the mesh roller system, so that the anti-fog coating liquid in the liquid storage tank is continuously added to the surface of the mesh roller system.

[0010] Preferably, the depth control plate comprises a rigid supporting plate, each adjustment column adapted to the corresponding mesh is integrally arranged on the rigid supporting plate, and the deformation layer is fixedly mounted on a side of the rigid supporting plate close to the mesh.

[0011] Preferably, the depth control device includes a depth control bracket, a plurality of depth control cylinders and a depth control sliding plate, the depth control cylinder is installed on the depth control bracket, the depth control sliding plate is installed at the output end of the depth control cylinder, the depth control sliding plate slides along the elastic fixed layer, each depth control sliding plate is arranged corresponding to each depth control plate, each depth control sliding plate forms an extrusion end, each depth control cylinder is connected to a solenoid valve, and each solenoid valve is electrically connected to a PLC programming controller.

[0012] Preferably, the anilox roller scraping system is a flexible scraper, which is in contact with the surface of the anilox roller and is used to wipe and clean the surface of the anilox roller when the anilox roller rotates.

[0013] Preferably, the deformation amount of the deformable layer under extrusion in each extrusion section is 35-40 um.

[0014] Preferably, the mesh angle of the mesh hole area is 45 degrees.

[0015] The beneficial effects of the present invention are:

[0016] The fixed-point coating machine for packaging bags comprises a feeding system, a mesh roller system, a rubber roller and a mesh roller scraping system. The feeding system supplies anti-fog coating liquid to the mesh roller system. The mesh roller system has a plurality of coating modules with adjustable depths arranged along the axial direction of the mesh roller system. The depth of each coating module is adjusted according to the position of the cursor sensed by the photoelectric sensing system, so that the coating module depth at the coating position is the largest and the depths of the other coating modules are zero, so that a depth for accommodating the anti-fog coating liquid is formed on the coating module at the coating position. The mesh roller system comprises a fixed frame, an anilox roller, a plurality of depth control sheets and a depth control device. The anilox roller is a hollow structure and is provided with an anilox hole area composed of a plurality of mesh holes. The anilox roller is in rolling contact with the impregnation roller, and then the anti-fog coating liquid on the impregnation roller is added to the anilox roller. The mesh angle of the anilox hole area is 45 degrees. The anilox roller is rotatably mounted on the fixed frame. Each depth control sheet is provided with an adjustment column extending into each mesh hole. The depth control A deformation layer is provided on one side of the film close to the anilox hole area, an elastic fixing layer for fixing the depth control sheet is provided on the innermost side of the anilox roller, and each adjustment column of the depth control sheet extends into each mesh hole. The elastic fixing layer material is thermoplastic polyurethane, and the elastic fixing layer is die-cast on the inner side of the anilox roller to fix each depth control sheet on the inner side of the anilox roller. A depth control device is installed in the anilox roller, and each depth control device is fixed on a fixed frame and has a plurality of extrusion ends for extruding the elastic fixing layer, and each extrusion end is arranged corresponding to each depth control sheet. A mesh roller scraping system is installed on the upper side of the extrusion end, and the mesh roller scraping system scrapes away excess anti-fog coating liquid on the mesh roller system, and the anti-fog coating liquid on the coating module at the coating position is not scraped off, and the anti-fog coating liquid on the remaining positions of the mesh roller system is scraped off, so as to control the coating position, and the packaging bag completes the fixed-point coating between the mesh roller system and the rubber roller, and the coating position in the axial direction of the anilox roller can be changed, and it has flexible production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the fixed-point coating machine.

[0018] Figure 2 This is a schematic diagram of the installation position of the screen roller system.

[0019] Figure 3 It is a schematic diagram of the structure of the screen roller system.

[0020] Figure 4 It is a cross-sectional diagram of the screen roller system.

[0021] Figure 5This is a schematic diagram of the installation position of the depth control cylinder.

[0022] Figure 6 This is a schematic diagram of the depth control component structure.

[0023] Figure 7 This is a schematic diagram of the depth control piece structure.

[0024] Figure 8 This is the production process flow chart of this packaging bag.

[0025] Description of reference numerals:

[0026] 1. Feeding system; 11. Wetting roller; 12. Liquid storage tank;

[0027] 2. Anilox roller system; 21. Anilox roller; 211. Anilox hole area; 212. Elastic fixing layer; 22. Depth control plate; 221. Adjustment column; 222. Deformation layer; 223. Rigid supporting plate; 23. Depth control device; 231. Depth control sliding plate; 232. Depth control bracket; 233. Depth control cylinder;

[0028] 3. Rubber roller;

[0029] 4. Screen roller scraping system. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] like Figure 1-8 As shown, this embodiment provides a packaging bag fixed-point coating machine, which is used to realize a production process of an easy-to-open packaging bag with a fixed-point anti-fog function, and the process includes the following steps:

[0032] S1: Printing packaging bag patterns and compounding easy-to-peel film, the packaging bag is easy to open after being compounded with the easy-to-peel film;

[0033] S2: Use a fixed-point coating machine to apply the anti-fog coating on a fixed-point basis. The fixed-point coating machine includes a feeding system 1, a screen roller system 2, a photoelectric eye sensing system, a PLC programming controller, a rubber roller 3, and a screen roller scraping system 4. S2 includes the following steps S21-S24:

[0034] S21: Use the feeding system 1 to supply the anti-fog coating liquid to the screen roller system 2;

[0035] S22: The screen roller system 2 has a plurality of coating modules with adjustable depths arranged along the axial direction of the screen roller system 2. The photoelectric eye sensing system illuminates the preset cursor position of the packaging bag and outputs relevant position information to the PLC programming controller. The depth of each coating module is adjusted according to the cursor position sensed by the photoelectric sensing system, so that the coating module at the coating position has the largest depth and the depths of the other coating modules are zero, so that a depth that can accommodate the anti-fog coating liquid is formed on the coating module at the coating position;

[0036] S23: The screen roller scraping system 4 scrapes off the excess anti-fog coating liquid on the screen roller system 2, the anti-fog coating liquid on the coating module at the coating position is not scraped off, and the anti-fog coating liquid on the remaining positions on the screen roller system 2 is scraped off, so as to control the coating position;

[0037] S24: The packaging bag passes through the screen roller system 2 and the rubber roller 3 to complete the fixed-point coating;

[0038] S3: Cutting and bag making.

[0039] The coating position of the anilox roller 21 in the axial direction can be changed, and the production capability is flexible.

[0040] The feeding system 1 includes a wetting roller 11 and a liquid storage tank 12. The liquid storage tank 12 stores anti-fog coating liquid. The wetting roller 11 is rotatably installed in the liquid storage tank 12. The wetting roller 11 is partially immersed in the anti-fog coating liquid in the liquid storage tank 12 and is rotationally contacted with the screen roller system 2, so that the anti-fog coating liquid in the liquid storage tank 12 is continuously added to the surface of the screen roller system 2.

[0041] The anilox roller system 2 includes a fixed frame, an anilox roller 21, a plurality of depth control sheets 22 and a depth control device 23. The anilox roller 21 is a hollow structure and is provided with an anilox hole area 211 composed of a plurality of meshes. The anilox roller 21 is in rolling contact with the impregnation roller 11, and then the anti-fog coating liquid on the impregnation roller 11 is added to the anilox roller 21. The mesh angle of the anilox hole area 211 is 45 degrees. The anilox roller 21 is rotatably mounted on the fixed frame. Each depth control sheet 22 is provided with an adjustment column 221 extending into each mesh. A deformation layer 222 is provided on one side of the depth control sheet 22 close to the anilox hole area 211. An elastic fixing layer 212 for fixing the depth control sheet 22 is provided at the innermost side of the anilox roller 21. Each adjustment column 221 of the depth control sheet 22 extends into each mesh hole. The elastic fixing layer 212 is made of thermoplastic polyurethane. The elastic fixing layer 212 is die-cast on the inner side of the anilox roller 21 to fix each depth control sheet 22 on the inner side of the anilox roller 21. A depth control device 23 is installed in the anilox roller 21. Each depth control device 23 is fixed on a fixed frame and has a plurality of extrusion ends for extruding the elastic fixing layer 212. Each extrusion end is arranged corresponding to each depth control sheet 22. The anilox roller scraping system 4 is installed on the upper side of the extrusion end.

[0042] For the extended extrusion end, the extrusion end squeezes the elastic fixed layer 212 and slides along the elastic fixed layer 212. Since the extrusion end has pressure on the elastic fixed layer 212, when the extrusion end passes the position of the deformation layer 222, the deformation layer 222 is deformed and causes the adjustment column 221 to extend outward from the mesh, pushing out the anti-fog coating liquid in the mesh, and immediately being scraped away by the mesh roller scraping system 4; for the non-extended extrusion end, the extrusion end has no pressure on the elastic fixed layer 212. When the extrusion end passes the position of the deformation layer 222, the adjustment column 221 and the mesh jointly store the anti-fog coating liquid for coating on the packaging bag.

[0043] The depth control sheet 22 includes a rigid support plate 223, and each adjustment column 221 adapted to the corresponding mesh is integrally arranged on the rigid support plate 223. The deformation layer 222 is fixed to the side of the rigid support plate 223 close to the mesh by injection molding. The material of the deformation layer 222 is thermoplastic polyurethane. The deformation amount of the deformation layer 222 under extrusion in each extrusion section is 35 or 40um, that is, the maximum depth of the anti-fog coating liquid stored in the mesh is 35 or 40um. The depth control sheet 22 and each mesh hole area 211 form a coating module.

[0044] The depth control device 23 includes a depth control bracket 232, a plurality of depth control cylinders 233 and a depth control sliding sheet 231. The depth control cylinder 233 is installed on the depth control bracket 232. The depth control sliding sheet 231 is installed at the output end of the depth control cylinder 233. The depth control sliding sheet 231 slides along the elastic fixed layer 212. Each depth control sliding sheet 231 is correspondingly arranged with each depth control sheet 22. Each depth control sliding sheet 231 forms an extrusion end. The photoelectric eye sensing system illuminates the preset cursor position of the packaging bag and outputs relevant position information to the PLC programming controller. Each depth control cylinder 233 is connected to a solenoid valve. Each solenoid valve is electrically connected to the PLC programming controller. The PLC programmable controller controls the corresponding position at the required coating position. The depth control cylinder 233 retracts, so that the depth control sliding piece 231 is out of contact with the elastic fixed layer 212, and the adjustment column 221 forms a space with a depth of 35 or 40 um in the corresponding mesh to accommodate the anti-fog coating liquid, and the anti-fog coating liquid is applied to the packaging bag when the packaging bag passes between the anilox roller 21 and the rubber roller 3; the depth control device 23 extends the depth control cylinder 233 corresponding to the position where coating is not required, so that the depth control sliding piece 231 squeezes the elastic fixed layer 212, and the deformation layer 222 is deformed under the squeezing of the depth control sliding piece 231, and the top of the adjustment column 221 is flush with the top of the mesh, and then the anilox roller scraping system 4 scrapes the anti-fog coating liquid on the mesh, which can change the coating position in the axial direction of the anilox roller 21, and has flexible production capabilities.

[0045] The anilox roller scraping system 4 is a flexible scraper, which contacts the surface of the anilox roller 21 and is used to wipe and clean the surface of the anilox roller 21 when the anilox roller 21 rotates.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fixed-point coating machine for packaging bags, characterized in that: The invention comprises a feeding system, an anilox roller system, a photoelectric eye sensing system, a PLC programming controller, a rubber roller and an anilox roller scraping system. The feeding system supplies anti-fog coating liquid to the anilox roller system. The anilox roller system has a plurality of coating modules with adjustable depths arranged along the axial direction of the anilox roller system. The photoelectric eye sensing system irradiates a preset cursor position of the packaging bag and outputs relevant position information to the PLC programming controller. The depth of each coating module is adjusted according to the position of the cursor sensed by the photoelectric eye sensing system, so that the coating module at the coating position has the maximum depth and the depth of the remaining coating modules is zero. The anilox roller system comprises a fixing frame, an anilox roller, a plurality of depth control sheets and a depth control device. The anilox roller is a hollow structure and has a plurality of depth control sheets on the anilox roller. A mesh hole area composed of a plurality of mesh holes is provided, the anilox roller is rotatably mounted on a fixed frame, each of the depth control sheets is provided with an adjustment column extending into each mesh hole, a deformation layer is provided on the side of the depth control sheet close to the anilox hole area, an elastic fixing layer for fixing the depth control sheet is provided on the innermost side of the anilox roller, the depth control device is installed in the anilox roller, each of the depth control devices is fixed on a fixed frame and has a plurality of extrusion ends for extruding the elastic fixing layer, each of the extrusion ends is arranged corresponding to each depth control sheet, the mesh roller scraping system is installed on the upper side of the extrusion end; the mesh roller scraping system scrapes off excess anti-fog coating liquid on the mesh roller system; the packaging bag completes point coating through the mesh roller system and the rubber roller.

2. The packaging bag fixed-point coating machine according to claim 1, characterized in that: The feeding system includes a wetting roller and a liquid storage tank, wherein the liquid storage tank stores anti-fog coating liquid, and the wetting roller is rotatably installed in the liquid storage tank. The wetting roller is partially immersed in the anti-fog coating liquid in the liquid storage tank and is rotationally contacted with the mesh roller system, so that the anti-fog coating liquid in the liquid storage tank is continuously added to the surface of the mesh roller system.

3. The packaging bag fixed-point coating machine according to claim 1, characterized in that: The depth control plate comprises a rigid supporting plate, and each of the adjustment columns adapted to the corresponding mesh is integrally arranged on the rigid supporting plate, and the deformation layer is fixedly mounted on a side of the rigid supporting plate close to the mesh.

4. The packaging bag fixed-point coating machine according to claim 1, characterized in that: The depth control device includes a depth control bracket, a plurality of depth control cylinders and a depth control sliding sheet. The depth control cylinder is installed on the depth control bracket. The depth control sliding sheet is installed at the output end of the depth control cylinder. The depth control sliding sheet slides along the elastic fixed layer. Each depth control sliding sheet is arranged corresponding to each depth control sheet. Each depth control sliding sheet forms an extrusion end. Each depth control cylinder is connected to a solenoid valve, and each solenoid valve is electrically connected to a PLC programming controller.

5. The packaging bag fixed-point coating machine according to claim 1, characterized in that: The anilox roller scraping system is a flexible scraper, which contacts the surface of the anilox roller and is used to wipe and clean the surface of the anilox roller when the anilox roller rotates.

6. The packaging bag fixed-point coating machine according to claim 1, characterized in that: The deformation amount of the deformation layer under the extrusion of each extrusion end is 35-40um.

7. The packaging bag fixed-point coating machine according to claim 1, characterized in that: The mesh angle of the mesh hole area is 45 degrees.

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