Comma scraper transfer coating head

Abstract

The utility model provides a comma scraper transfer coating head which comprises a machine frame, a transfer coating rubber roller is installed on the machine frame, a coating steel roller is installed on the left side of the transfer coating rubber roller and tightly attached to the transfer coating rubber roller, and a coating rubber roller pushing servo mechanism is installed on one side of the transfer coating rubber roller. The double-sided comma scraper is installed above the coating steel roller, the trough mechanism is installed below the coating steel roller, a scraper lifting air cylinder which is vertically and downwards arranged is installed above the double-sided comma scraper, a telescopic shaft of the scraper lifting air cylinder is connected with the double-sided comma scraper, and a scraper gap detection mechanism is installed between the double-sided comma scraper and the coating steel roller. And a scraper fine adjustment mechanism is mounted below the double-sided comma scraper. The comma scraper transfer coating head is ingenious in design, simple in structure and convenient to operate, and the coating weight and the coating precision are effectively controlled by adopting the double-sided comma scraper.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a comma scraper transfer coating head. Background Art

[0002] A coating machine is a device that coats a rolled substrate with a layer of glue, paint or ink with specific functions, dries it and then rewinds it. It is mainly used in the production of surface coating processes for films, paper, etc. A transfer coating machine adheres the coating to the substrate by connecting the coating roller and the backing roller. When the coating roller and the backing roller are separated, a blank area is generated on the substrate. In the lithium battery industry, transfer coating machines are still needed for coating battery poles in the R&D stage and small batch proofing stage.

[0003] In the prior art, transfer coating and blade coating are two different coating heads, and it is difficult to achieve functional conversion during the production process. For example, the Chinese patent with publication number CN202387634U discloses a transfer coating machine, wherein an upper and a lower bracket are provided on the frame, a scraper roller is rotatably mounted on the upper bracket, and a coating roller arranged in parallel with the scraper roller and used in conjunction with the scraper roller is rotatably mounted on the lower bracket, and a knife gap is left between the coating roller and the scraper roller, and the transfer coating machine includes a lower driving device for driving the coating roller toward the scraper roller by driving the lower bracket, and the lower driving device includes two sets of servo drive mechanisms that are arranged symmetrically about the coating roller and act synchronously, and each set of servo drive mechanisms includes a passive slider fixed on the corresponding part of the lower bracket located on one side of the coating roller and an active slider located below the passive slider and pushed with the passive slider, the active slider is driven by a servo motor to move in the left and right directions, and at least one of the two correspondingly matched push contact surfaces on the active slider and the passive slider is an inclined surface or a curved surface. The above transfer coating machine can only perform transfer coating, and cannot perform blade coating alone. Another example is a Chinese patent with publication number CN203316341U, which discloses a coating machine scraper device, including a scraper frame connected to a coating machine frame, a scraper with a blade corresponding to the coating machine coating roller pressed by a scraper pressing plate on the scraper frame, a scraper frame adjustment shaft parallel to the scraper frame is movably provided on the coating machine frame, the scraper frame is connected to the scraper frame adjustment shaft and rotates around the scraper adjustment shaft, the scraper frame adjustment shaft is fixedly connected to an adjustment worm gear, and an adjustment worm gear driven by the adjustment worm gear is supported on the coating machine frame, and the adjustment worm gear is connected to the hand wheel. The above-mentioned coating machine can only perform scraper coating, and cannot perform transfer coating. Moreover, it is difficult for existing scraper coaters and transfer coaters to effectively control the coating thickness and coating uniformity. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model proposes a comma scraper transfer coating head, which integrates comma scraper coating and transfer coating on the same mechanism, can meet more production requirements, and can achieve effective control of coating amount and coating accuracy.

[0005] To realize the above technical scheme, the utility model provides a comma scraper transfer coating head, including a frame, a transfer coating rubber roller is installed on the frame, a coating rubber roller pushing servo mechanism connected to the transfer coating rubber roller is installed on the right side of the transfer coating rubber roller, a coating steel roller is installed on the left side of the transfer coating rubber roller, one end of the coating steel roller and the transfer coating rubber roller are respectively installed with a coating steel roller transmission mechanism and a transfer coating rubber roller transmission mechanism, a double-sided comma scraper is installed obliquely above the coating steel roller, a material trough mechanism is installed below the coating steel roller, a scraper lifting cylinder arranged vertically downward is installed above the double-sided comma scraper, the telescopic shaft of the scraper lifting cylinder is connected to the double-sided comma scraper, a scraper gap detection mechanism is installed between the double-sided comma scraper and the coating steel roller, and a scraper fine-tuning mechanism is installed below the double-sided comma scraper.

[0006] In the above technical scheme, during actual operation, when blade coating is performed, the coating rubber roller is first pushed by the servo mechanism to pull the transfer coating rubber roller to the right, so that a distance is maintained between the transfer coating rubber roller and the coating steel roller. At this time, the substrate is guided into the transfer coating rubber roller by the guide roller (at this time, the transfer coating rubber roller is equivalent to a large guide roller), the transfer coating rubber roller runs in the reverse direction, and the coating steel roller runs in the forward direction. The substrate is coated on the coating steel roller and contacts with the coating in the material trough mechanism, so that the surface of the substrate is coated with coating, and then the excess coating on the surface of the substrate is scraped off by a double-sided comma scraper to achieve quantitative control of the coating, and finally transferred to the drying oven via the guide roller installed on the upper right side of the coating steel roller. When transfer coating is performed, the transfer coating rubber roller is first pushed to the left by the coating rubber roller pushing servo mechanism, so that the transfer coating rubber roller and the coating steel roller are in close contact, and the substrate is guided by the guide roller into the coating area composed of the coating steel roller and the transfer coating rubber roller. The coating steel roller absorbs the coating in the material trough mechanism and then scrapes off the excess coating on the surface of the coating steel roller through the double-sided comma scraper. Then it contacts the substrate and coats the quantitative coating on the surface of the substrate. Then, the coated substrate is transferred to the drying oven through the transfer coating rubber roller.

[0007] Preferably, a single-arm support unwinding mechanism is installed on the frame. An unwinding deviation rectifying follower roller is installed obliquely above the single-arm support unwinding mechanism. A unwinding tension swing roller is installed obliquely above the unwinding deviation rectifying follower roller. The unwinding tension swing roller is installed obliquely below the transfer coating roller. A plurality of guide rollers are installed between the transfer coating roller and the unwinding tension swing roller. During actual operation, the substrate to be coated is continuously unwound through the single-arm support unwinding mechanism, and then passes through the unwinding deviation rectifying follower roller and the unwinding tension swing roller for deviation rectification and tension adjustment, and then enters the coating area composed of the coating steel roller and the transfer coating roller through the guidance of the guide rollers. The unwinding mechanism adopts a single-arm support structure, which saves installation space, simplifies the tape running path, and makes it more convenient to replace the substrate during production. The two ends of the axis of the follower roller are supported by linear bearings and are connected to the deviation rectifying mechanism through a connecting plate, and follow the movement together with the unwinding deviation rectifying mechanism. The unwinding deviation rectifying photoelectric eye is fixed on the frame. The whole set of mechanism has a simple structure, reasonable design and convenient use.

[0008] Preferably, an angle a is provided between the central connection line of the double-sided comma doctor blade and the coating steel roller and the vertical direction. The angle at which the substrate climbs backward through the transfer coating roller after coating is b. The angle a between the central connection line of the double-sided comma doctor blade and the coating steel roller and the vertical direction and the climbing angle b satisfy b < a - 3°. In actual research, it is found that during the scraping process, the angle a between the central connection line of the double-sided comma doctor blade and the coating steel roller and the vertical direction and the climbing angle b satisfy b < a - 3°. Only when b < a - 3°, that is, the edge of the double-sided comma doctor blade is supported by the coating steel roller, and when the coating passes through the edge of the doctor blade after being extruded and scraped by the double-sided comma doctor blade and is supported by the coating steel roller, can the precise control of the coating thickness be ensured. Otherwise, the coating on the surface of the coating steel roller is prone to fluctuate horizontally, resulting in uneven horizontal thickness, and in severe cases, the substrate may even break.

[0009] Preferably, the angle a is 15 - 20°. In actual research, it is found that when the angle a is 15 - 20°, the coating thickness of the coating can be controlled more evenly, and there will be no scratches on the surface of the coating. When the angle a is less than 15°, scratches are likely to occur on the surface of the coating. When the angle a is greater than 20°, it is difficult to precisely control the coating thickness.

[0010] Preferably, the doctor blade gap detection mechanism is a detection block with an inclination. The inclination angle c of the detection block is the same as the angle a between the central connection line of the double-sided comma doctor blade and the coating steel roller and the vertical direction. In actual research, it is found that when the inclination angle c of the detection block is the same as the angle a, the change in the gap value between the double-sided comma doctor blade and the coating steel roller can be visually feedback, and the adjusted gap size can be directly feedback through a micrometer (grating scale), reducing the debugging preparation time and improving the production efficiency.

[0011] Preferably, an unwinding deviation correction electric eye is installed between the unwinding deviation correction follower roller and the unwinding tension swing roller to improve the unwinding quality.

[0012] Preferably, a stirring cylinder is installed above the trough mechanism, and a stirring rod is installed on the stirring cylinder. The bottom of the stirring rod can extend into the trough mechanism. During actual operation, the trough mechanism can be stirred by the stirring rod to improve the uniformity of the paint and defoam the paint.

[0013] Preferably, a human-machine interface, a gas control panel and a cabinet are installed on the rack to facilitate setting of working parameters.

[0014] The utility model provides a comma scraper transfer coating head with the beneficial effects of: the comma scraper transfer coating head is cleverly designed, simple in structure, easy to operate, and integrates comma scraper coating and transfer coating on the same mechanism to meet more production requirements. Comma scraper coating can achieve continuous coating production with good uniform coating thickness, and transfer coating can achieve two process requirements of continuous coating and intermittent coating. In actual work, when blade coating is performed, the coating rubber roller is first pushed by the servo mechanism to pull the transfer coating rubber roller to the right, so that a distance is maintained between the transfer coating rubber roller and the coating steel roller. At this time, the substrate is guided into the transfer coating rubber roller by the guide roller (at this time, the transfer coating rubber roller is equivalent to a large guide roller), the transfer coating rubber roller runs in the reverse direction, and the coating steel roller runs forward. The substrate is coated on the coating steel roller and contacts with the coating in the material trough mechanism, so that the surface of the substrate is coated with coating, and then the excess coating on the surface of the substrate is scraped off by a double-sided comma scraper to achieve quantitative control of the coating, and finally transferred to the drying oven via the guide roller installed on the upper right of the coating steel roller. When transfer coating is performed, the transfer coating rubber roller is first pushed to the left by the coating rubber roller pushing servo mechanism, so that the transfer coating rubber roller and the coating steel roller are in close contact, and the substrate is guided by the guide roller into the coating area composed of the coating steel roller and the transfer coating rubber roller. The coating steel roller absorbs the coating in the material trough mechanism and then scrapes off the excess coating on the surface of the coating steel roller through the double-sided comma scraper. Then it contacts the substrate and coats the quantitative coating on the surface of the substrate. Then, the coated substrate is transferred to the drying oven through the transfer coating rubber roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure assembly of the utility model.

[0016] Figure 2 It is a side sectional view of the utility model.

[0017] Figure 3 It is a side view of the utility model.

[0018] Figure 4 It is a front view of the utility model.

[0019] Figure 5 It is a top view of the utility model.

[0020] Figure 6 It is a schematic diagram of the installation of the local structure of the utility model.

[0021] In the figure: 1. Coating steel roller; 2. Transfer coating rubber roller; 3. Double-sided comma scraper; 4. Material trough mechanism; 5. Stirring cylinder; 6. Scraper lifting cylinder; 7. Unwinding tension swing roller; 8. Single-arm support unwinding mechanism; 9. Scraper gap detection mechanism; 10. Scraper fine-tuning mechanism; 11. Coating rubber roller pushing servo mechanism; 12. Coating steel roller transmission mechanism; 13. Transfer coating rubber roller transmission mechanism; 14. Human-machine interface; 15. Air control panel; 16. Cabinet; 17. Unwinding correction follow-up roller; 18. Unwinding correction electric eye; 19. Guide roller; 20. Frame; 21. Stirring rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. All other embodiments obtained by ordinary personnel in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment: A comma blade transfer coating head.

[0024] Reference Figures 1 to 6 As shown, a comma scraper transfer coating head with high-precision coating thickness control includes: a frame 20, a transfer coating rubber roller 2 is installed on the frame 20, a coating steel roller 1 is installed on the left side of the transfer coating rubber roller 2, and a coating steel roller transmission mechanism 12 and a transfer coating rubber roller transmission mechanism 13 are installed at one end of the coating steel roller 1 and the transfer coating rubber roller 2, respectively. The coating steel roller 1 and the transfer coating rubber roller 2 are installed in a direct drive manner, which improves the transmission accuracy. A coating rubber roller push servo mechanism 11 is installed on the right side of the transfer coating rubber roller 2, and the transfer coating rubber roller 2 is controlled to open and close by the rubber roller push servo mechanism 11 to form a gap coating system. In actual operation, when scraper coating is performed, the transfer coating rubber roller 2 is pulled to the right by the coating rubber roller push servo mechanism 11, so that a distance is maintained between the transfer coating rubber roller 2 and the coating steel roller 1. When transfer coating is performed, the transfer coating rubber roller 2 can be pushed to the left by the coating rubber roller pushing servo mechanism 11, so that the transfer coating rubber roller 2 and the coating steel roller 1 are in close contact to form a coating area, and then the blade coating and transfer coating can be integrated on the same mechanism.

[0025] The double-sided comma scraper 3 is installed obliquely above the coating steel roller 1, and the trough mechanism 4 is installed below the coating steel roller 1. In actual operation, the coating steel roller 1 absorbs the coating in the trough mechanism 4 and then scrapes off the excess coating on the surface of the coating steel roller 1 through the double-sided comma scraper 3, and then contacts the substrate to apply the quantitative coating on the surface of the substrate, and then transfers the coated substrate to the drying oven through the coating steel roller 2. A stirring cylinder 5 is installed above the trough mechanism 4, and a stirring rod 21 is installed on the stirring cylinder 5. The bottom of the stirring rod 21 can extend into the trough mechanism 4. In actual operation, the stirring rod 21 can be used to stir the trough mechanism 4 to improve the uniformity of the coating and defoam the coating.

[0026] A scraper lifting cylinder 6 arranged vertically downward is installed above the double-sided comma scraper 3, and the telescopic shaft of the scraper lifting cylinder 6 is connected to the double-sided comma scraper 3. In actual operation, the contact pressure between the double-sided comma scraper 3 and the coating steel roller 1 can be adjusted by the scraper lifting cylinder 6. A scraper gap detection mechanism 9 is installed between the double-sided comma scraper 3 and the coating steel roller 1, and the gap between the double-sided comma scraper 3 and the coating steel roller 1 can be monitored in real time through the scraper gap detection mechanism 9. The scraper gap detection mechanism 9 is a detection block with an inclination, and the inclination angle c of the detection block is the same as the angle a between the center line connecting the double-sided comma scraper 3 and the coating steel roller 1 and the vertical direction. Actual research has found that when the inclination angle c of the detection block is the same as the angle a, the gap value change between the double-sided comma scraper 3 and the coating steel roller 1 can be intuitively fed back, and the adjusted gap size can be directly fed back through the micrometer (grating ruler), which reduces the debugging preparation time and improves production efficiency. A scraper fine-tuning mechanism 10 is installed below the double-sided comma scraper 3. During actual operation, the scraper fine-tuning mechanism 10 can adjust the gap between the double-sided comma scraper 3 and the coating steel roller 1, thereby accurately adjusting the coating amount and improving the coating accuracy.

[0027] In this embodiment, an included angle α is provided between the central connection line of the double-sided comma doctor blade 3 and the coating steel roller 1 and the vertical direction. The included angle α is 15-20°, and the optimal preferred angle of the included angle α is 18.5°. It is actually found in research that when the included angle α is 15-20°, the coating thickness of the coating can be controlled more evenly, and there will be no scratches on the surface of the coating. Among them, the effect is the best when the included angle α is 18.5°. When the included angle α is less than 15°, scratches are likely to occur on the surface of the coating. When the included angle α is greater than 20°, it is difficult to accurately control the coating thickness. After coating, the angle at which the substrate is conveyed backward uphill by the coating steel roller 2 is β. The included angle α between the central connection line of the double-sided comma doctor blade 3 and the coating steel roller 1 and the vertical direction and the uphill conveying angle β satisfy β < α - 3°. It is found in actual research that only when β < α - 3°, that is, the edge of the double-sided comma doctor blade 3 is supported by the coating steel roller 1, and when the coating passes through the edge of the doctor blade after being extruded and scraped by the double-sided comma doctor blade 3, there is support from the coating steel roller 1, can the accurate control of the coating thickness be ensured. Otherwise, the coating on the surface of the coating steel roller 1 is extremely likely to fluctuate horizontally, resulting in uneven horizontal thickness.

[0028] A single-arm supported unwind mechanism 8 is installed on the frame 20. An unwind deviation-correcting follower roller 17 is installed obliquely above the single-arm supported unwind mechanism 8. An unwind tension swing roller 7 is installed obliquely above the unwind deviation-correcting follower roller 17. The unwind tension swing roller 7 is installed obliquely below the transfer coating roller 2. Two guide rollers 19 are installed between the transfer coating roller 2 and the unwind tension swing roller 7. During actual operation, the substrate to be coated is continuously unwound through the single-arm supported unwind mechanism 8, and then passes through the unwind deviation-correcting follower roller 17 and the unwind tension swing roller 7 for deviation correction and tension adjustment, and then enters the coating area composed of the coating steel roller 1 and the transfer coating roller 2 through the guidance of the guide rollers 19. The unwind mechanism adopts a single-arm supported structure, which saves installation space, simplifies the tape running path, and makes it more convenient to replace the substrate during production. The two ends of the axis of the follower roller are supported by linear bearings and are connected to the deviation-correcting mechanism through a connecting plate, and follow the unwind deviation-correcting mechanism. The unwind deviation-correcting photoelectric eye is fixed on the frame. The whole set of mechanism has a simple structure, reasonable design, and convenient use. An unwind deviation-correcting photoelectric eye 18 is installed between the unwind deviation-correcting follower roller 17 and the unwind tension swing roller 7 to improve the unwind quality. A human-machine interface 14, a pneumatic control panel 15, and a cabinet 16 are also installed on the frame 20 for setting working parameters.

[0029] The comma knife transfer coating head for high-precision coating thickness control is ingeniously designed and has a simple structure. It integrates comma knife coating and transfer coating on the same mechanism, meeting more production requirements. Comma knife coating can achieve continuous coating production with good consistency in coating thickness. Transfer coating can meet the requirements of two processes: continuous coating and intermittent coating. During actual operation, when performing knife coating, first, the coating rubber roller pushes the servo mechanism 11 to pull the transfer coating rubber roller 2 to move to the right, so that a distance of about 5 mm is maintained between the transfer coating rubber roller 2 and the coating steel roller 1. At this time, the substrate is guided by the guide roller into the transfer coating rubber roller 2 (at this time, the transfer coating rubber roller acts as a large guide roller). The transfer coating rubber roller 2 rotates reversely, and the coating steel roller 1 rotates forward. The substrate is wrapped around the coating steel roller 1 and contacts the coating in the trough mechanism 4, so that the surface of the substrate is coated with the coating. Then, the excess coating on the surface of the substrate is scraped off by the double-sided comma knife 3 to achieve quantitative control of the coating. Finally, it is transferred into the drying oven via the guide roller 19 installed above the right of the coating steel roller 1. And it is found in actual research that during the scraping process, the angle a between the center line connecting the double-sided comma knife 3 and the coating steel roller 1 and the vertical direction and the climbing conveying angle b satisfy b < a - 3°. Only when b < a - 3°, that is, the edge of the double-sided comma knife 3 is supported by the coating steel roller 1, and when the coating passes through the edge of the double-sided comma knife 3 after being extruded and scraped by the double-sided comma knife 3 and is supported by the coating steel roller 1, can the precise control of the coating thickness be ensured. Otherwise, the coating on the surface of the coating steel roller 1 is prone to fluctuate horizontally, resulting in uneven horizontal thickness, and in severe cases, the substrate may even break. When performing transfer coating, first, the coating rubber roller pushes the servo mechanism 11 to push the transfer coating rubber roller 2 to move to the left, so that the transfer coating rubber roller 2 is in close contact with the coating steel roller 1. The substrate is guided by the guide roller into the coating area composed of the coating steel roller 1 and the transfer coating rubber roller 2. The coating steel roller 1 adsorbs the coating in the trough mechanism 4 and then scrapes off the excess coating on the surface of the coating steel roller 1 via the double-sided comma knife 3. Then it contacts the substrate and coats the quantitative coating on the surface of the substrate. Then, the coated substrate is transferred into the drying oven via the transfer coating rubber roller 2.

[0030] By setting the coating rubber roller to push the servo mechanism 11, the present utility model can not only achieve transfer coating but also achieve knife coating. When performing knife coating, through the structural design of the installation angle of the knife and the backward climbing conveying angle, effective control of the coating thickness can be achieved and the coating uniformity can be improved.

[0031] The above is the preferred embodiment of the present utility model, but the present utility model should not be limited to the content disclosed in this embodiment and the drawings. Therefore, all equivalent or modified implementations completed without departing from the spirit disclosed by the present utility model fall within the protection scope of the present utility model.

Claims

1. A comma blade transfer coating head, comprising a frame, characterized in that: A transfer coating rubber roller is installed on the frame, a coating rubber roller pushing servo mechanism connected to the transfer coating rubber roller is installed on the right side of the transfer coating rubber roller, a coating steel roller is installed on the left side of the transfer coating rubber roller, a coating steel roller transmission mechanism and a transfer coating rubber roller transmission mechanism are respectively installed on one end of the coating steel roller and the transfer coating rubber roller, a double-sided comma scraper is installed obliquely above the coating steel roller, a material trough mechanism is installed below the coating steel roller, a scraper lifting cylinder arranged vertically downward is installed above the double-sided comma scraper, a telescopic shaft of the scraper lifting cylinder is connected to the double-sided comma scraper, a scraper gap detection mechanism is installed between the double-sided comma scraper and the coating steel roller, and a scraper fine-tuning mechanism is installed below the double-sided comma scraper.

2. The comma blade transfer coating head according to claim 1, characterized in that: A single-arm supported unwinding mechanism is installed on the frame, an unwinding correction follower roller is installed obliquely above the single-arm supported unwinding mechanism, an unwinding tension swing roller is installed obliquely above the unwinding correction follower roller, the unwinding tension swing roller is installed obliquely below the transfer coating rubber roller, and a plurality of guide rollers are installed between the transfer coating rubber roller and the unwinding tension swing roller.

3. The comma blade transfer coating head according to claim 1, characterized in that: The double-sided comma scraper and the coating steel roller center connecting line are set with the vertical direction at an angle a. After coating, the substrate is transported backward via the transfer coating rubber roller at an angle b. The angle a between the double-sided comma scraper and the coating steel roller center connecting line and the vertical direction and the angle b of the climbing transport satisfy b. <a-3°。 4. The comma blade transfer coating head as claimed in claim 3, characterized in that: The angle a is 15-20°.

5. The comma blade transfer coating head as claimed in claim 4, characterized in that: The scraper gap detection mechanism is a detection block with an inclination, and the inclination angle c of the detection block is the same as the angle a between the center line of the double-sided comma scraper and the coating steel roller and the vertical direction.

6. The comma blade transfer coating head according to claim 2, characterized in that: An unwinding deflection correction electric eye is installed between the unwinding deflection correction follower roller and the unwinding tension swing roller.

7. The comma blade transfer coating head according to claim 1, characterized in that: A stirring cylinder is installed above the material trough mechanism, and a stirring rod is installed on the stirring cylinder. The bottom of the stirring rod can extend into the material trough mechanism.

8. The comma blade transfer coating head according to claim 1, characterized in that: A human-machine interface, a gas control panel and a cabinet are installed on the frame.

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