Non-woven fabric blade coating device

Abstract

The utility model discloses a non-woven fabric blade coating device which comprises a rack, a plurality of unit modules, a gas path system and a liquid path system, each unit module comprises a barometer, an electromagnetic valve and a blade coating mechanism, the barometer and the electromagnetic valve are connected through a first connecting gas pipe, the input end of the barometer is connected into the gas path system, and the output end of the barometer is connected into the liquid path system. The output end of the electromagnetic valve is connected into the blade coating mechanism through a second connecting air pipe. According to the blade coating device for the non-woven fabric, the blade coating mechanism is arranged, under the cooperation of the piston module and the liquid distribution pipe, the piston module can be accurately controlled through compressed air by means of a barometer and an electromagnetic valve, and therefore the surface of the non-woven fabric is evenly and stably coated with a hydrophilic agent through the blade coating assembly in a trace blade coating mode; compared with a traditional roller coating and spraying mode, waste of the hydrophilic agent is reduced, the production cost is reduced, and the coating efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating, especially the scraping coating device of non - woven fabric. BACKGROUND

[0002] Non - woven fabric is an important material widely used in hygiene products, medical dressings, wet wipes and other fields. However, non - woven fabric itself usually has hydrophobicity, which means its absorption and transmission capacity of liquid is poor, limiting its application in the scene requiring fast liquid absorption and liquid guiding. In order to improve this performance, coating hydrophilic agent becomes a kind of key technology. By coating hydrophilic agent on the surface of non - woven fabric, a special film or coating can be formed on its surface, changing its surface tension, thereby improving the wettability and absorption speed of liquid on the surface of non - woven fabric. This technology makes non - woven fabric better meet the needs of hygiene products (such as sanitary napkins, paper diapers), medical dressings and wet wipes and other products for efficient liquid management.

[0003] At present, the industry mainly adopts two kinds of hydrophilic agent coating methods of roller coating and spraying, the roller coating technology is to uniformly coat the hydrophilic agent on the surface of non - woven fabric through the rotating coating roller, this method is suitable for the demand of large area, uniform coating, and the spraying technology is to spray the hydrophilic agent in the form of mist on the non - woven fabric through the nozzle, which is suitable for the occasion requiring fast and efficient coating, these two kinds of technology meet the basic needs of non - woven fabric coating hydrophilic agent to a certain extent.

[0004] In the process of realizing the present application, the inventor found that there are at least the following problems in the prior art:

[0005] Firstly, there is a great difficulty in controlling the coating amount for the roller coating and spraying technology, the roller coating technology is affected by many factors such as coating roller speed, pressure and hydrophilic agent viscosity, so it is difficult to accurately control the coating amount, and the spraying technology makes the coating amount more difficult to grasp because of the diffusivity of mist hydrophilic agent, which easily leads to uneven or excessive coating in the production link, causing waste of hydrophilic agent and increasing production cost, secondly, due to the instability of coating amount, the subsequent drying through oven is often needed to ensure the uniformity and performance of the coating, which not only increases the energy consumption, but also prolongs the production cycle, in addition, the drying process may have adverse effects on the physical properties of non - woven fabric, such as reducing softness or changing fiber structure.

[0006] Therefore, the above technical problems need to be solved. SUMMARY

[0007] In order to overcome the shortcomings of the prior art, the scraping coating device of non - woven fabric is proposed, which solves the problems proposed in the background technology.

[0008] In order to solve the above technical problems, the basic technical scheme of the utility model is as follows:

[0009] The scraping device for non-woven fabric comprises a frame, a plurality of unit modules assembled on the frame, and a gas path system and a liquid path system for delivering compressed air and hydrophilic agent respectively,

[0010] The unit module comprises a pressure gauge and a solenoid valve arranged side by side, and a scraping mechanism horizontally arranged in front of the two, the pressure gauge and the solenoid valve are connected through a first connecting air pipe, the input end of the pressure gauge is connected to the gas path system, and the output end of the solenoid valve is connected to the scraping mechanism through a second connecting air pipe,

[0011] The scraping mechanism comprises a scraping assembly and a plurality of piston modules fixed and inserted into the rear part of the scraping assembly at equal distances, and a liquid distribution pipe horizontally installed on the top of the scraping assembly and connected with the plurality of piston modules respectively, a first branch air pipe and a second branch air pipe are connected above the plurality of piston modules, a port for connecting the liquid path system is arranged on one side of the top of the liquid distribution pipe, and the first branch air pipe is connected with the second connecting air pipe,

[0012] The scraping assembly comprises a shell seat, an inclined support block for guiding the hydrophilic agent, and two sealing plates, the front part of the shell seat is provided with an opening for the inclined support block to pass through, the two sealing plates are fixedly installed on the two sides of the shell seat and form a space for accommodating the front part of the plurality of piston modules and installing the inclined support block, and a gap for outputting the hydrophilic agent is formed between the inclined surface of the inclined support block and the shell seat,

[0013] The piston module comprises a cylinder body and a plunger coaxially and slidingly assembled in the cylinder body, and a piston sleeve assembled at the rear part of the plunger, the top and the end of the front end of the cylinder body are respectively provided with a liquid inlet and a liquid outlet, and the top of the rear end of the cylinder body is provided with a first air hole and a second air hole connected with the first branch air pipe and the second branch air pipe respectively.

[0014] Preferably, the frame comprises a cross beam and a profile frame fixedly installed on the top of the cross beam, two parallel linear guides are arranged on the top of the profile frame, a plurality of support platforms for assembling the pressure gauge or the solenoid valve are slidingly installed on the two linear guides, a vertical plate is vertically installed on the front side of the bottom surface of each support platform, and two locking bolts for positioning the vertical plate are installed through the vertical plate. The linear guides and the support platforms on the frame are designed to allow the position of the components such as the pressure gauge and the solenoid valve to be adjusted flexibly to meet the installation requirements in specific environments.

[0015] Preferably, the top of each of the plurality of support platforms is provided with a support for connecting a doctoring mechanism, the support comprising an L-shaped fixing base and a screw vertically assembled between the L-shaped fixing base and the housing base, and a strip-shaped hole is formed in the vertical surface of the L-shaped fixing base and penetrable by the screw.

[0016] Preferably, the device further comprises a limiting rod coaxially arranged with the ejector pin and threadedly assembled with the rear end of the cylinder body. The limiting rod is mainly used for adjusting the movement range of the ejector pin in the cylinder body, so as to ensure that the ejector pin moves within a specified stroke and avoids uneven coating caused by excessive movement, and the limiting rod also provides stable support for the ejector pin, preventing damage of the ejector pin caused by excessive movement or uneven force during the operation of the piston module, thereby prolonging the service life of the piston module.

[0017] The device has the following beneficial effects:

[0018] The device has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic diagram of the device;

[0020] Figure 2 FIG. 2 is a structural schematic diagram of a unit module of the device;

[0021] Figure 3 FIG. 3 is a structural schematic diagram of a doctoring mechanism of the device;

[0022] Figure 4 FIG. 4 is a structural schematic diagram of a rack of the device;

[0023] Figure 5 FIG. 5 is a sectional structural schematic diagram of a piston module of the device;

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 100, rack;

[0026] 110, beam; 120, profile frame; 130, linear guide rail; 140, support table; 150, vertical plate; 160, locking bolt;

[0027] 200, unit module;

[0028] 210, air pressure gauge; 220, electromagnetic valve; 230, blade coating mechanism; 240, first connecting air pipe; 250, second connecting air pipe; 260, support;

[0029] 2310, blade coating assembly; 2320, piston module; 2330, liquid distribution pipe; 2340, first branch air pipe; 2350, second branch air pipe;

[0030] 2311, shell seat; 2312, inclined support block; 2313, sealing plate;

[0031] 2321, cylinder body; 2322, thimble; 2323, piston sleeve; 2324, liquid inlet; 2325, liquid outlet; 2326, first air hole; 2327, second air hole; 2328, limiting rod;

[0032] 2331, port;

[0033] 2610, L-shaped fixing seat; 2620, screw rod; 2630, strip-shaped hole;

[0034] 300, air path system;

[0035] 400, liquid path system. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] Please refer to Figures 1-5The utility model provides technical scheme: non - woven fabric's scraping device, including frame 100 and a plurality of unit module 200 of assembling on frame 100 and respectively for compressed air and hydrophilic agent delivery gas path system 300 and liquid path system 400, unit module 200 includes side -by -side arrangement's air pressure table 210 and solenoid valve 220 and the scraping mechanism 230 of transverse erection in both front, air pressure table 210 and solenoid valve 220 are connected through first connecting air pipe 240, the input end of air pressure table 210 accesses gas path system 300, and the output end of solenoid valve 220 accesses scraping mechanism 230 through second connecting air pipe 250, and scraping mechanism 230 includes scraping assembly 2310 and a plurality of the piston module 2320 of even distribution fixed plug -in in the rear of scraping assembly 2310 and the liquid distribution pipe 2330 of transverse installation in the top of scraping assembly 2310 and respectively with a plurality of piston module 2320 is connected, a plurality of piston module 2320 is connected with the first branch air pipe 2340 and second branch air pipe 2350 of front, rear distribution above, and the port 2331 of liquid distribution pipe 2330 top one side is equipped with the access of liquid path system 400, and first branch air pipe 2340 is connected with second connecting air pipe 250, and scraping assembly 2310 includes shell seat 2311, the inclined support block 2312 of the hydrophilic agent flow guide and two sealing plates 2313, and the front of shell seat 2311 has reserved the opening of the penetration of inclined support block 2312, and two sealing plates 2313 are fixedly installed in the both sides of shell seat 2311 and form the space of the front of a plurality of piston module 2320 and the installation of inclined support block 2312 can be accommodated, and the inclined surface between inclined support block 2312 and shell seat 2311 forms the gap of the output of hydrophilic agent, and piston module 2320 includes cylinder body 2321 and the top needle 2322 of coaxial sliding assembly in cylinder body 2321 and the piston sleeve 2323 of assembly in the rear of top needle 2322, and the top of cylinder body 2321 front end and end portion are equipped with liquid inlet 2324 and drain 2325 respectively, and the top of cylinder body 2321 rear end is equipped with first air hole 2326 and second air hole 2327 respectively with first branch air pipe 2340 and second branch air pipe 2350 are connected.

[0038] Based on the structure of the above setting, the non-woven fabric scraping device is composed of a rack 100, an air path system 300, a liquid path system 400 and a plurality of unit modules 200, wherein the rack 100 is the support structure of the whole device, the air path system 300 provides a stable compressed air source for the device, the liquid path system 400 is responsible for stably delivering the hydrophilic agent to the liquid distribution pipe 2330, providing continuous paint supply for the scraping process, and the unit module 200 is a modular scraping unit. In the unit module 200, the air pressure gauge 210 is used to monitor and control the air pressure, and the electromagnetic valve 220 is used to control the flow direction of the compressed air to control the state switching of the piston module 2320. Specifically, during the working process, the hydrophilic agent enters the liquid distribution pipe 2330 through the liquid path system 400, the liquid distribution pipe 2330 uniformly distributes the hydrophilic agent to the liquid inlet 2324 of each piston module 2320, the compressed air is connected to the unit module 200 from the air path system 300, when the electromagnetic valve 220 is in the input state, the compressed air passes through the air pressure gauge 210, the first connecting air pipe 240, the electromagnetic valve 220 and the second connecting air pipe 250 in turn, and enters the first branch air pipe 2340. When the compressed air enters the first air hole 2326 of the piston module 2320, it will push the piston sleeve 2323 and the needle 2322 to move backward, and the liquid outlet 2325 is opened. At this time, the hydrophilic agent slowly enters the cylinder body 2321 from the liquid inlet 2324 and finally flows out from the liquid outlet 2325 and falls on the inclined surface of the inclined support block 2312 in the shell seat 2311. At the same time, the hydrophilic agent is guided by the inclined surface of the inclined support block 2312 and finally output from the gap between the shell seat 2311 and the inclined support block 2312. The non-woven fabric surface conveyed by the roller group will rub the outside of the inclined support block 2312, thereby achieving scraping coating of the hydrophilic agent on the non-woven fabric surface. It should be noted that when the electromagnetic valve 220 is in the input state, the piston sleeve 2323 and the needle 2322 move backward, at this time, the gas behind the piston sleeve 2323 in the cylinder body 2321 will be squeezed and delivered to the second branch air pipe 2350 through the second air hole 2327. When the electromagnetic valve 220 is in the output state, it is a reverse air extraction. At this time, the front of the piston sleeve 2323 in the cylinder body 2321 is in a negative pressure state, and the gas in the second branch air pipe 2350 will be delivered back to the cylinder body 2321 through the second air hole 2327, and will push the piston sleeve 2323 and the needle 2322 to move forward until the needle 2322 blocks the liquid outlet 2325, and the liquid outlet 2325 is closed. By adjusting the air pressure and the working frequency of the electromagnetic valve 220, the coating amount of the hydrophilic agent can be accurately controlled to ensure the uniformity and stability of the coating. The non-woven fabric scraping device is provided with a scraping mechanism 230, which cooperates with the piston module 2320 and the liquid distribution pipe 2330, and the air pressure gauge 210 and the electromagnetic valve 220 can accurately control the piston module 2320 through compressed air, so that the hydrophilic agent is uniformly and stably coated on the non-woven fabric surface in a micro scraping manner through the scraping assembly 2310. Compared with the traditional roller coating and spraying method,Not only reduce the waste of hydrophilic agent, reduce the production cost, also improve the coating efficiency and quality, in addition, due to trace amount of blade coating method hydrophilic agent coating more uniform, stable, subsequent need not again through oven drying, can direct natural drying, not only save energy, also shorten the production cycle, improve the production efficiency, at the same time, avoid the adverse effects of drying process on the physical properties of non-woven fabric may have.

[0039] Further, the rack 100 comprises a crossbeam 110 and a profile rack 120 fixedly installed on the top of the crossbeam 110, two parallel linear guides 130 are arranged on the top of the profile rack 120 in a transverse direction, and a plurality of support table surfaces 140 for assembling the air pressure gauges 210 or the electromagnetic valves 220 are slidingly installed on the two linear guides 130, a vertical plate 150 is vertically installed on the front side of the bottom surface of each of the plurality of support table surfaces 140, and two locking bolts 160 for positioning the vertical plate 150 are installed through the vertical plate 150.

[0040] Further, a support 260 for connecting the blade coating mechanism 230 is installed on the top of each of the plurality of support table surfaces 140, the support 260 comprises an L-shaped fixing seat 2610 and a screw rod 2620 vertically assembled between the L-shaped fixing seat 2610 and a shell seat 2311, and a strip-shaped hole 2630 for the screw rod 2620 to penetrate through is formed on the vertical surface of the L-shaped fixing seat 2610 in a vertical direction.

[0041] Further, a limiting rod 2328 coaxially distributed with the thimble 2322 and screw assembled at the rear end of the cylinder body 2321 is further included.

[0042] According to the disclosure and teaching of the above description, the skilled in the art of the present application can also change and modify the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should also fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the present specification, these terms are only for convenience of explanation and do not constitute any limitation on the present application.

Claims

1. A nonwoven fabric coating device, characterized in that: It includes a frame (100) and several unit modules (200) mounted on the frame (100), as well as an air system (300) and a liquid system (400) for supplying compressed air and hydrophilic agent respectively. The unit module (200) includes a pressure gauge (210) and a solenoid valve (220) arranged side by side, and a scraping mechanism (230) horizontally mounted in front of them. The pressure gauge (210) and the solenoid valve (220) are connected through a first connecting air pipe (240). The input end of the pressure gauge (210) is connected to the air circuit system (300), and the output end of the solenoid valve (220) is connected to the scraping mechanism (230) through a second connecting air pipe (250). The coating mechanism (230) includes a coating assembly (2310) and several piston modules (2320) that are evenly distributed and fixedly inserted at the rear of the coating assembly (2310), and a liquid distribution pipe (2330) that is horizontally installed on the top of the coating assembly (2310) and connected to the several piston modules (2320). The several piston modules (2320) are connected to a first branch air pipe (2340) and a second branch air pipe (2350) that are distributed in front and back. The top side of the liquid distribution pipe (2330) is provided with a port (2331) for the liquid circuit system (400) to access. The first branch air pipe (2340) is connected to the second connecting air pipe (250). The coating assembly (2310) includes a housing (2311), a diagonal support block (2312) for guiding the hydrophilic agent, and two sealing plates (2313). The front of the housing (2311) is reserved with an opening through which the diagonal support block (2312) can pass. The two sealing plates (2313) are respectively fixedly installed on both sides of the housing (2311) and form a space for accommodating the front of several piston modules (2320) and installing the diagonal support block (2312). A gap is formed between the inclined surface of the diagonal support block (2312) and the housing (2311) for the hydrophilic agent to be output. The piston module (2320) includes a cylinder (2321) and a pin (2322) coaxially slidably mounted in the cylinder (2321), and a piston sleeve (2323) mounted on the rear of the pin (2322). The top and end of the front end of the cylinder (2321) are respectively provided with a liquid inlet (2324) and a liquid outlet (2325). The top of the rear end of the cylinder (2321) is provided with a first air hole (2326) and a second air hole (2327) respectively connected to the first branch air pipe (2340) and the second branch air pipe (2350).

2. The nonwoven fabric coating device according to claim 1, characterized in that: The frame (100) includes a crossbeam (110) and a profile frame (120) fixedly installed on its top. The top of the profile frame (120) has two parallel linear guide rails (130) arranged horizontally. Several support platforms (140) for mounting pressure gauges (210) or solenoid valves (220) are slidably installed on the two linear guide rails (130). Vertical plates (150) are vertically installed on the front side of the bottom surface of the several support platforms (140), and two locking bolts (160) for positioning are installed through the vertical plates (150).

3. The nonwoven fabric coating device according to claim 2, characterized in that: The top of each of the support platforms (140) is equipped with a bracket (260) for connection to the coating mechanism (230). The bracket (260) includes an L-shaped fixing seat (2610) and a screw (2620) vertically assembled between the L-shaped fixing seat (2610) and the housing (2311). The L-shaped fixing seat (2610) has strip holes (2630) distributed vertically and through which the screw (2620) can pass.

4. The nonwoven fabric coating device according to claim 1, characterized in that: It also includes a limiting rod (2328) that is coaxially distributed with the ejector pin (2322) and threadedly fitted to the rear end of the cylinder body (2321).

Images