Glassine paper single-side coating device

Abstract

The utility model discloses a glassine paper single-face coating device which comprises an unwinding roller, a preheating mechanism, a single-face coating mechanism and an oil scraping mechanism which are sequentially arranged, and the single-face coating mechanism comprises a supporting soft roller, a coating roller, a transferring roller and a material box which are sequentially arranged from bottom to top; the oil scraping mechanism comprises a scraper, and a supporting roller is arranged below the scraper. According to the glassine paper single-face coating device, the situation that a coated coating is concentrated on the two sides of glassine paper can be effectively avoided, and secondary cutting and edge cutting are not needed. The thickness and the state of the coating are easier to control, and the coating process can be conveniently adjusted according to the coating type, the width and the thickness of glassine paper and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating, and particularly relates to a single-sided coating device for glassine paper. Background Art

[0002] Glassine paper is a kind of industrial paper, and the original paper is made into glassine paper after coating processing. The base paper of glassine paper has a dense and uniform texture, good internal strength and light transmittance, and is a commonly used material for making barcode labels, self-adhesive labels, tapes or sticky industrial products, especially suitable for rotary and flat die cutting. In the existing glassine paper manufacturing process, coatings such as silicone oil need to be coated on the glassine base paper. During the process of transferring the coating to the glassine base paper using a coating roller, since the coating has a certain thickness, the coating roller is likely to squeeze the coating to both sides of the glassine base paper, resulting in the coating being applied to both sides and even the back of the glassine base paper. It is necessary to cut off the parts on both sides during the subsequent processing to ensure the normal use of the glassine paper. Therefore, it is necessary to improve the existing coating process of glassine paper. Summary of the Utility Model

[0003] To solve the above technical problems, the technical solution adopted by the utility model is: a single-sided coating device for glassine paper, which includes a unwind roller, a preheating mechanism, a single-sided coating mechanism, and an oil scraping mechanism arranged in sequence.

[0004] The preheating mechanism includes a number of hot gas nozzles, and the hot gas nozzles are connected to high-temperature gas through a pipeline with a valve.

[0005] The single-sided coating mechanism includes a support soft roller, a coating roller, a transfer roller, and a material box arranged from bottom to top in sequence. The support soft roller includes a support shaft and an elastic layer covering the circumferential surface of the support shaft and fixedly connected to the support shaft. The coating roller is driven to rotate by a driving mechanism, and the diameter of the coating roller gradually decreases from the middle to both sides. A layer of elastic transfer layer is covered on the circumferential surface of the transfer roller, and the elastic transfer layer is attached to the middle of the coating roller, and gaps are formed between both ends of the elastic transfer layer and both ends of the coating roller. The inside of the material box is filled with liquid coating material, and a number of liquid dropping heads are arranged at the lower end of the material box opposite to the transfer roller.

[0006] The oil scraping mechanism includes a scraper, and the scraper is driven to lift by a lifting driving mechanism. A support roller is arranged below the scraper.

[0007] As a preference of the above technical solution, a number of pairs of stabilizing roller groups are respectively arranged before and after the preheating mechanism. Each pair of stabilizing roller groups includes two stabilizing rollers. The hot gas nozzles are divided into a number of upper hot gas nozzles and a number of lower hot gas nozzles. The upper hot gas nozzles are arranged downward, and the lower hot gas nozzles are arranged upward. The glassine paper passes between the upper hot gas nozzles and the lower hot gas nozzles.

[0008] Preferably, as the above technical solution, the elastic layer is made of sponge, and the elastic transfer layer is made of sponge.

[0009] Preferably, as the above technical solution, the elastic layer is detachably mounted on the support shaft, and the elastic transfer layer is detachably mounted on the transfer roller.

[0010] Preferably, as the above technical solution, the coating roller includes a central shaft and a rubber sleeve sleeved on the central shaft. One end of the central shaft is fixedly sleeved with a fixed tube, and the other end is movably sleeved with a movable tube. A plurality of elastic strips are connected between the fixed tube and the movable tube. The elastic strips are located inside the rubber sleeve and support the rubber sleeve. A threaded portion is provided on the central shaft, and a locking nut is threadedly connected to the threaded portion. The locking nut abuts against the movable tube.

[0011] Preferably, as the above technical solution, two side transfer rollers are provided between the single-sided coating mechanism and the oil scraping mechanism. The two side transfer rollers are arranged oppositely. One end of the side transfer roller is inclined downward to contact the upper surface of the glassine paper, and the other end is driven to rotate by a rotation driving mechanism. The included angle between the side transfer roller and the conveying direction of the glassine paper is an acute angle.

[0012] Preferably, as the above technical solution, a plurality of flattening roller groups are provided between the side transfer roller and the oil scraping mechanism. Each flattening roller group includes two flattening rollers, and a rubber layer is sleeved on the surface of the flattening rollers.

[0013] Preferably, as the above technical solution, a plurality of guide rollers are provided between the unwinding roller and the preheating mechanism, and a plurality of guide rollers are provided behind the oil scraping mechanism.

[0014] The beneficial effects of the present invention are as follows: The glassine paper single-sided coating device of the present invention can effectively prevent the coated coating from concentrating on both sides of the glassine paper, and there is no need for secondary cutting and trimming. The thickness and state of the coating are easier to control, and it is convenient to adjust the coating process according to the type of coating, the width and thickness of the glassine paper, etc. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic cross-sectional structural diagram of the coating roller;

[0017] Figure 3 is a schematic structural diagram of the side transfer roller;

[0018] Figure 4 is a schematic structural diagram of the side transfer roller from another angle. Detailed Embodiments

[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] As Figure 1 shown, the glassine paper single-sided coating device includes a unwind roller 1, a preheating mechanism, a single-sided coating mechanism, and an oil scraping mechanism arranged in sequence.

[0023] The preheating mechanism includes a plurality of hot gas nozzles 2, and the hot gas nozzles 2 are connected to high-temperature gas through a pipeline with a valve. The high-temperature gas ejected by the hot gas nozzles 2 raises the temperature of the glassine paper to be higher than or close to the temperature of the liquid coating material, so that the liquid coating material will not solidify immediately, which is convenient for subsequent control of the coating state of the liquid coating material on the glassine paper.

[0024] The single-sided coating mechanism includes a support soft roller 3, a coating roller 4, a transfer roller 5, and a material box 6 arranged in sequence from bottom to top. The support soft roller 3 includes a support shaft 7 and an elastic layer 8 covering the circumferential surface of the support shaft 7 and fixedly connected to the support shaft 7. The coating roller 4 is driven to rotate by a driving mechanism. The diameter of the coating roller 4 gradually decreases from the middle to both sides. A layer of elastic transfer layer 9 is covered on the circumferential surface of the transfer roller 5. The elastic transfer layer 9 is attached to the middle of the coating roller 4, and gaps are formed between the two ends of the elastic transfer layer 9 and the two ends of the coating roller 4. The material box 6 contains liquid coating material, and several liquid dripping heads 10 facing the transfer roller 5 are provided at the lower end of the material box 6. After passing through the coating roller 4, the glassine paper forms a state of being sunken in the middle, and the liquid coating material will not be squeezed to run to both sides of the glassine paper or even flow to the lower surface of the glassine paper. The driving mechanism can be driven by a common motor.

[0025] The oil scraping mechanism includes a scraper 11. The scraper 11 is driven to lift and lower by a lifting driving mechanism. A support roller 12 is provided below the scraper 11. The support roller 12 supports the glassine paper, so that the descending scraper 11 can scrape the liquid coating material on the glassine paper flat. The lifting driving mechanism uses a cylinder or an electric push rod.

[0026] Further, several pairs of stabilizing roller groups are respectively provided in front of and behind the preheating mechanism. Each pair of stabilizing roller groups includes two stabilizing rollers 13. The hot gas nozzles 2 are divided into several upper hot gas nozzles and several lower hot gas nozzles. The upper hot gas nozzles are arranged downward, and the lower hot gas nozzles are arranged upward. The glassine paper passes between the upper hot gas nozzles and the lower hot gas nozzles. The high-temperature gas ejected from the upper hot gas nozzles and the lower hot gas nozzles quickly heats up the passing glassine paper. The stabilizing roller groups keep the glassine paper in a stable state during preheating, uniformly heated, and not affected by the single-sided coating mechanism.

[0027] Further, the elastic layer 8 is made of sponge, and the elastic transfer layer 9 is made of sponge. The elastic layer 8 and the elastic transfer layer 9 made of sponge have good deformation performance and will not cause damage to the glassine paper.

[0028] Further, the elastic layer 8 is detachably installed on the support shaft 7, and the elastic transfer layer 9 is detachably installed on the transfer roller 5. The elastic layer 8 and the elastic transfer layer 9 are regularly replaced and maintained.

[0029] Further, as Figure 2As shown, the coating roller 4 includes a central shaft 14 and a rubber sleeve 15 sleeved on the central shaft 14. One end of the central shaft 14 is fixedly sleeved with a fixed tube 16, and the other end is movably sleeved with a movable tube 17. A number of elastic strips 18 are connected between the fixed tube 16 and the movable tube 17. The elastic strips 18 are located inside the rubber sleeve 15 and support the rubber sleeve 15. A threaded portion 19 is provided on the central shaft 14, and a locking nut 20 is threadedly connected to the threaded portion 19. The locking nut 20 abuts against the movable tube 17. By adjusting the locking nut 20, the position of the movable tube 17 is adjusted, the bending degree of the elastic strips 18 is adjusted, and the diameter of the middle part of the coating roller 4 is changed. In this way, the appropriate diameter of the middle part of the coating roller 4 can be selected according to the width of the base paper of the glassine paper.

[0030] Further, as Figure 3 and 4 shown, two side transfer rollers 21 are provided between the single-sided coating mechanism and the oil scraping mechanism. The two side transfer rollers 21 are arranged oppositely. One end of the side transfer roller 21 is inclined downward to contact the upper surface of the glassine paper, and the other end is driven to rotate by a rotation driving mechanism. The included angle between the side transfer roller 21 and the conveying direction of the glassine paper is an acute angle. The two side transfer rollers 21 transfer the liquid coating material in the middle of the glassine paper to both sides of the glassine paper by rotation. Since one end of the inner surface of the side transfer roller 21 is low and the outer side is high, the gradually cooling liquid coating material will not be taken out of the glassine paper, resulting in the lower surface of the liquid coating material also sticking to the liquid coating material. The liquid coating material can be fully unfolded and laid flat on the surface of the base paper of the glassine paper during the process of gradually cooling to form a coating. The rotation driving mechanism uses a motor.

[0031] Further, a number of flattening roller groups 22 are provided between the side transfer roller 21 and the oil scraping mechanism. The flattening roller group 22 includes two flattening rollers 22, and a rubber layer 23 is sleeved on the surface of the flattening roller 22. The rubber layer 23 on the flattening roller 22 has elasticity, which restores the glassine paper with a middle depression caused by the extrusion of the coating roller 4 to a flat shape, and can also play a role in leveling the coating to a certain extent, facilitating the subsequent use of a scraper to further scrape and level the coating evenly.

[0032] Further, a number of guide rollers 24 are provided between the unwinding roller 1 and the preheating mechanism, and a number of guide rollers 24 are provided behind the oil scraping mechanism. The guide rollers 24 play a guiding role in the conveying of the glassine paper.

[0033] After the base paper 25 is unwound by the unwinding roller 1, it is preheated by the hot air ejected from the hot air nozzle 2, so that the temperature of the base paper 25 is higher than or close to the temperature of the liquid coating material in the material box 6; the preheated base paper 25 enters between the supporting soft roller 3 and the coating roller 4, and the middle part of the base paper 25 is recessed downward at a certain angle. After the liquid coating material in the material box 6 is evenly dropped on the transfer roller 5 through the drip head 10, it is then transferred to the coating roller 4 and finally coated on the surface of the base paper 25, forming a coating with a thick middle and thin sides on the upper surface of the base paper 25; the base paper 25 with the coating passes between the scraper 11 and the supporting roller 12, and the scraper 11 levels the coating on the base paper 25, thereby forming a uniform coating on the base paper 25. After being preheated, the base paper 25 will not cause the liquid coating material to rapidly cool and solidify when contacting the liquid coating material, so that the liquid coating material can maintain a certain fluidity on the surface of the base paper 25. The coating roller 4 coats the liquid coating material on the base paper 25, forming a coating with a thick middle and thin sides. After the coating is leveled by the scraper 11, it can be evenly distributed on the surface of the base paper 25 and will not be overly concentrated on both sides of the base paper 25 or even flow to the back of the base paper 25. The obtained glassine paper can be used without being cut and trimmed.

[0034] It is worth mentioning that the technical features such as motors and cylinders involved in the patent application of the present utility model should be regarded as the prior art. The specific structures, working principles, and possible control methods and spatial arrangement methods of these technical features can be selected conventionally in the art and should not be regarded as the inventive points of the patent of the present utility model. The patent of the present utility model will not be further specifically elaborated.

[0035] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present application based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A single-sided coating device for glassine paper, characterized in that, It includes an unwinding roller, a preheating mechanism, a single-sided coating mechanism, and an oil scraping mechanism arranged in sequence. The preheating mechanism includes a number of hot gas nozzles, and the hot gas nozzles are connected to high-temperature gas through a pipeline with a valve. The single-sided coating mechanism includes a support soft roller, a coating roller, a transfer roller, and a material box arranged from bottom to top in sequence. The support soft roller includes a support shaft and an elastic layer covering the circumferential surface of the support shaft and fixedly connected to the support shaft. The coating roller is driven to rotate by a driving mechanism. The diameter of the coating roller gradually decreases from the middle to both sides. A layer of elastic transfer layer is covered on the circumferential surface of the transfer roller. The elastic transfer layer is attached to the middle of the coating roller, and gaps are formed between the two ends of the elastic transfer layer and the two ends of the coating roller. The material box contains liquid coating material, and a number of liquid dripping heads facing the transfer roller are provided at the lower end of the material box. The oil scraping mechanism includes a scraper, and the scraper is driven to lift and lower by a lifting driving mechanism. A support roller is provided below the scraper.

2. The single-sided coating device for glassine paper according to claim 1, characterized in that, A number of pairs of stabilizing roller groups are respectively provided in front of and behind the preheating mechanism. Each pair of stabilizing roller groups includes two stabilizing rollers. The hot gas nozzles are divided into a number of upper hot gas nozzles and a number of lower hot gas nozzles. The upper hot gas nozzles are arranged downward, and the lower hot gas nozzles are arranged upward.

3. The single-sided coating device for glassine paper according to claim 1, characterized in that The elastic layer is made of sponge, and the elastic transfer layer is made of sponge.

4. The device for single-sided coating of glassine paper according to claim 3, characterized in that, The elastic layer is detachably installed on the support shaft, and the elastic transfer layer is detachably installed on the transfer roller.

5. The single-sided coating device for glassine paper according to claim 1, wherein, The coating roller includes a central shaft and a rubber sleeve sleeved on the central shaft. A fixed tube is fixedly sleeved at one end of the central shaft, and a movable tube is movably sleeved at the other end. A number of elastic strips are connected between the fixed tube and the movable tube. The elastic strips are located inside the rubber sleeve and support the rubber sleeve. A threaded portion is provided on the central shaft, and a locking nut is threadedly connected to the threaded portion. The locking nut abuts against the movable tube.

6. The device for single-sided coating of glassine paper according to claim 5, characterized in that, Two side transfer rollers are provided between the single-sided coating mechanism and the oil scraping mechanism. The two side transfer rollers are arranged oppositely. One end of the side transfer roller is inclined downward to contact the upper surface of the glassine paper, and the other end is driven to rotate by a rotary driving mechanism. The included angle between the side transfer roller and the conveying direction of the glassine paper is an acute angle.

7. The device for single-sided coating of glassine paper according to claim 6, wherein A number of flattening roller groups are provided between the side transfer roller and the oil scraping mechanism. Each flattening roller group includes two flattening rollers, and a rubber layer is sleeved on the surface of the flattening roller.

8. The device for single-sided coating of glassine paper according to claim 1, wherein A number of guiding rollers are provided between the unwinding roller and the preheating mechanism, and a number of guiding rollers are provided behind the oil scraping mechanism.

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