Composite paper standby coating machine for eliminating bubbles and coating method

Abstract

The invention relates to the technical field of coating, in particular to a standby composite paper coating machine for eliminating bubbles and a coating method.A bubble eliminating mechanism is arranged in a glue solution pool and composed of a supporting frame set, a bubble attaching roller, an inner pipe, an outer pipe and a reverse transmission assembly; the bubble attaching roller is arranged in the glue solution pool and is in transmission connection with the coating roller through the reverse transmission assembly, so that the coating roller can drive the bubble attaching roller to rotate reversely when rotating, when bubbles exist in the pigment, the bubbles can be attached to the bubble attaching roller located on the liquid outlet side of the coating roller, and the bubble attaching roller rotates and abuts against the outer pipe. And therefore, the problems that an existing bubble eliminating mechanism cannot maintain the coating with the standard thickness of the coating roller and a plastic film cylinder is abraded are solved.

Description

Technical Field

[0001] The invention relates to the technical field of coating, and in particular to a coating machine and a coating method for eliminating bubbles for preparing composite paper. Background Art

[0002] During coating and lamination, the liquid coating (glue) needs to be applied to the substrate according to the process requirements to obtain a flat, smooth, bubble-free coating.

[0003] In the prior art, a coating roller is generally used for coating operations. The principle is that the coating roller is immersed in the glue in the glue tank and rotates. A part of the glue adheres to the surface of the roller and rotates with the roller. Then, the excess glue on the roller is scraped off with a scraper, and then the glue on the roller with a predetermined thickness or amount is coated on the substrate. When the equipment is running, the coating roller is immersed in the glue and rotates at high speed (for example, when the anilox roller is used for coating, the linear speed of the anilox roller can reach more than 70m / min). A part of the glue is thrown out of the glue tank and then flows back into the glue tank, and the excess glue scraped from the coating roller by the scraper also flows back to the glue tank. These two parts of the glue come into contact with the air under high-speed movement, which will draw a large amount of air into the coating in the glue tank to form tiny bubbles. The bubbles in the coating reach the coated substrate along with the coating adhered to the coating roller (such as anilox roller or roller), forming a bubbled or uneven coating, which seriously affects the product quality. Moreover, the above defects will be aggravated with the increase of the rotation speed of the coating roller, and the production speed will be difficult to increase.

[0004] Chinese patent publication number CN210792402U discloses a defoaming device for coating in the coating production process; the defoaming device is provided with an internally inflated plastic film tube, which is closely attached to the water outlet side of the anilox roller. When the anilox roller carrying the coating is discharged from the water, the bubbles thereon are eliminated by squeezing the plastic film tube. However, the squeezing action of the plastic film tube makes it difficult for the coating originally evenly coated on the surface of the anilox roller to maintain a preset standard thickness due to the intervention of the squeezing action of the plastic film tube. This deviation will interfere with the precise control of the coating quality in subsequent process links.

[0005] The rotation mechanism of the plastic film tube relies on the friction between it and the anilox roller. This friction drive mode causes the loss of the surface material of the plastic film tube to increase, affecting the size of the plastic film tube. In addition, the inconsistent degree of inflation will also affect the diameter of the plastic film tube, resulting in changes in the contact pressure between the plastic film tube and the anilox roller, which has a negative impact on the overall production efficiency. Summary of the invention

[0006] In view of the problems of the prior art, a coating machine and a coating method for eliminating bubbles for preparing composite paper are provided. A bubble eliminating mechanism is arranged in a glue liquid pool, and the mechanism is composed of a support frame group, an attached bubble roller, an inner tube, an outer tube and a reverse transmission component. The attached bubble roller is arranged in the glue liquid pool and is connected to the coating roller through the reverse transmission component, so that the coating roller can drive the attached bubble roller to rotate in the opposite direction when it rotates. When bubbles exist in the pigment, the bubbles will adhere to the attached bubble roller located on the liquid outlet side of the coating roller, and the attached bubble roller rotates and abuts against the outer tube, so that the outer tube squeezes the bubbles to eliminate the bubbles, thereby solving the problem that the existing bubble eliminating mechanism cannot maintain the standard thickness of the coating on the coating roller and the plastic film tube wears out.

[0007] In order to solve the problems of the prior art, the present invention provides a coating machine for eliminating bubbles for preparing composite paper, comprising a glue liquid pool, a coating roller arranged in the glue liquid pool, and a back roller arranged on the top of the coating roller, and the composite paper passes between the back roller and the coating roller; a bubble eliminating mechanism is also arranged on the glue liquid pool and is located on the side where the coating roller rotates out of the glue liquid pool; the bubble eliminating mechanism comprises an attached bubble roller and a flexible bubble pressing roller group; the attached bubble roller is rotatably arranged in the glue liquid pool; the flexible bubble pressing roller group comprises an inner tube fixedly arranged on a support frame group and an outer tube sleeved outside the inner tube, the inner diameter of the outer tube is larger than the outer diameter of the inner tube, the attached bubble roller, the inner tube and the outer tube are all parallel to the coating roller, and the outer tube abuts against the outer circumferential surface of the attached bubble roller.

[0008] Preferably, the bubble elimination mechanism also includes a support frame group and a reverse transmission assembly; the end of the coating roller is provided with a coating end shaft coaxial therewith, the end of the bubble attaching roller is provided with a bubble attaching end shaft coaxial therewith, and the reverse transmission assembly is arranged on the support frame group, the reverse transmission assembly transmission connects the coating end shaft and the bubble attaching end shaft, and the coating roller and the bubble attaching roller rotate in opposite directions; the reverse transmission assembly includes a driving shaft transmission connected to the coating end shaft and a driven shaft transmission connected to the bubble attaching end shaft, and the driving shaft and the driven shaft transmit reversely; the support frame group includes a fixed frame, a deflection frame, a deflection adjuster and an extension frame; the fixed frame is arranged on the glue liquid pool; the deflection adjuster includes a fixed end connected to the fixed frame and a movable end close to the coating end shaft, and the movable end of the deflection adjuster can deflect relative to its fixed deflection; the deflection frame is arranged on the movable end of the deflection adjuster, and the driving shaft is rotatably arranged on the deflection frame; the extension frame is arranged on the deflection adjuster and close to the glue liquid pool, and the driven shaft is rotatably arranged on the extension frame and is coaxially fixedly connected to the bubble attaching end shaft.

[0009] Preferably, the deflection frame is provided with an open transverse V-shaped groove, and the top and bottom ends of the V-shaped groove are respectively provided with an abutment wheel and a driving wheel rotatably connected to the deflection frame, the abutment wheel and the driving wheel abut on the circumferential surface of the coating end shaft, the driving shaft and the driving wheel are coaxially fixedly connected, and the reverse transmission assembly also includes a reverse shaft arranged on the deflection frame, the driving shaft is provided with a driving gear, the reverse shaft is provided with a reverse gear, the driving gear is meshed with the reverse gear, and the reverse shaft is transmission-connected to the driven shaft.

[0010] Preferably, the deflection adjuster includes an upper connecting rod, a lower connecting rod, an adjusting rod and a spring, both ends of the upper connecting rod and the lower connecting rod are rotatably connected to the deflection frame, the lower connecting rod and the upper connecting rod are arranged in parallel, and the end of the upper connecting rod away from the deflection frame extends along its length direction to form an adjusting arm; the two ends of the adjusting rod are respectively rotatably connected to the adjusting arms of the two upper connecting rods, and the adjusting rod is arranged parallel to the coating roller; upper connecting blocks are equidistantly arranged on the adjusting rod; lower connecting blocks corresponding to the upper connecting blocks are equidistantly arranged on the outside of the fixed frame deviating from the glue pool; the two ends of the spring are respectively fixedly connected to the upper connecting block and the lower connecting block.

[0011] Preferably, the fixing frame includes a square tube extending along the length direction of the glue pool, the square tube abuts against the top of the glue pool and is arranged parallel to the coating roller, positioning seats are arranged at both ends of the square tube, and the positioning seats are provided with abutment bolts that vertically penetrate the positioning seats and are threadedly connected to the positioning seats, and the abutment bolts abut against the side of the glue pool.

[0012] Preferably, the reverse transmission assembly also includes a sliding block, a tensioning shaft, and a transmission belt; the sliding block is slidably arranged on the lower connecting rod along the length direction of the lower connecting rod, and a tension spring is arranged between the sliding block and the end of the lower connecting rod; the tensioning shaft is vertically rotatably arranged on the sliding block, a tensioning wheel is arranged on the tensioning shaft, a reverse wheel is arranged on the reverse shaft, and a driven wheel is arranged on the driven shaft; the transmission belt is sleeved on the reverse wheel, the driven wheel and the tensioning wheel.

[0013] Preferably, the reverse transmission assembly further comprises a support plate arranged on the deflection frame and the sliding block, on which two scrapers are arranged, and the two scrapers are provided with scraping openings with opening directions opposite to each other and extending along the width direction of the transmission belt, and the transmission belt passes through the scraping openings of the two scrapers.

[0014] Preferably, the lower connecting rod is provided with a locking block sliding along the length direction thereof, the locking block is provided with a sliding groove extending in the vertical direction of the lower connecting rod, the extension frame is slidably provided on the sliding groove, the extension frame is provided with an upper connecting port extending along the length direction thereof, the locking block is provided with a locking pin threadedly connected thereto, one end of the locking pin is provided with a pin cap abutting against the outer side of the upper connecting port, and the other end of the locking pin abuts against the lower connecting rod; the extension frame is provided with a lower connecting port parallel to the lower connecting rod, the end of the inner tube is provided with a fixed end shaft coaxial therewith and passing through the lower connecting port, the fixed end shaft is provided with a nut threadedly connected thereto and abutting against the outer side of the lower connecting port.

[0015] Preferably, annular grooves are arranged at equal intervals on the circumferential surface of the foam roller, and annular teeth capable of engaging with the annular grooves are arranged on the outer circumferential surface of the outer tube.

[0016] A coating method for eliminating bubbles for preparing composite paper, using a coating machine for eliminating bubbles for preparing composite paper, comprising the following steps; Step 1: Install the bubble elimination mechanism on the glue pool, and let the composite paper pass through the backing roller and the coating roller; Step 2: When the coating roller and the backing roller rotate, the foam roller rotates and adheres to the bubbles generated in the glue solution; Step 3: The bubbles are broken and disappear under the squeezing action of the bubble roller and the outer tube.

[0017] Compared with the prior art, the present application has the following beneficial effects: the present application has a bubble elimination mechanism disposed on the liquid outlet side of the coating roller, and the bubble elimination mechanism includes a support frame group, an attached bubble roller, an inner tube, an outer tube and a reverse transmission component.

[0018] During the process of liquid discharge and liquid inflow of the coating roller, if bubbles are mixed into the pigment, these bubbles will adhere to the surface of the bubble roller located on the liquid discharge side of the coating roller during the coating process. At this time, the continuously rotating bubble roller will gradually come into contact with the outer tube, and the outer tube will apply a stable and uniform squeezing force to the bubbles on the surface of the bubble roller, causing the bubbles to deform under pressure until they burst and dissipate, thereby achieving the purpose of efficiently eliminating bubbles.

[0019] The surface of the foam roller is provided with annular grooves arranged along its length direction, and the circumferential surface of the outer tube is provided with annular teeth that can be engaged with the annular grooves. Without changing the length of the foam roller, the surface area of ​​the foam roller is effectively increased, providing more adhesion area for bubbles, and further improving the defoaming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of a coating machine for eliminating bubbles for preparing composite paper according to the present invention; Figure 2 It is a schematic diagram of a coating machine for eliminating bubbles for preparing composite paper of the present invention; Figure 3 It is a stereoscopic view of a bubble elimination mechanism in a bubble elimination coating machine for preparing composite paper according to the present invention at a first viewing angle; Figure 4 yes Figure 3 A local enlarged view of point A; Figure 5 It is a stereoscopic view of a bubble elimination mechanism in a bubble elimination coating machine for preparing composite paper according to the present invention at a second viewing angle; Figure 6 yes Figure 5 A partial enlarged view of point B; Figure 7 It is a three-dimensional exploded view of a support frame assembly in a coating machine for eliminating bubbles for preparing composite paper according to the present invention at a first viewing angle; Figure 8 It is a three-dimensional exploded view of a support frame assembly in a coating machine for eliminating bubbles for preparing composite paper according to the present invention at a second viewing angle; Fig. 9It is a stereoscopic diagram of a foam roller and a flexible foam pressing roller group in a coating machine for eliminating bubbles for preparing composite paper according to the present invention; Fig.10 The present invention is a three-dimensional exploded view of a deflection regulator in a coating machine for eliminating bubbles for preparing composite paper.

[0021] The numbers in the figure are: 1, glue tank; 2, coating roller; 3, back roller; 41, support frame group; 411, fixed frame; 4111, square tube; 4112, positioning seat; 4113, abutment bolt; 4114, lower connecting block; 412, deflection frame; 4121, abutment wheel; 4122, driving wheel; 413, deflection regulator; 4131, upper connecting rod; 4132, lower connecting rod; 4133, locking block; 4134, locking pin; 4135, spring; 4136, adjusting rod; 4137, upper connecting block; 414, extension frame ; 42. Foam roller; 421. Annular groove; 431. Inner tube; 4311. Fixed end shaft; 4312. Nut; 432. Outer tube; 4321. Annular teeth; 44. Reverse transmission assembly; 441. Driving shaft; 442. Driven shaft; 4421. Driven wheel; 443. Reverse shaft; 4431. Reverse wheel; 444. Driving gear; 445. Reverse gear; 446. Sliding block; 4461. Tension spring; 447. Tensioning shaft; 4471. Tensioning wheel; 448. Transmission belt; 449. Support plate; 4491. Scraper. DETAILED DESCRIPTION

[0022] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the present application provides a coating machine for eliminating bubbles for preparing composite paper, comprising a glue pool 1, a coating roller 2 arranged in the glue pool 1, and a backing roller 3 arranged on the top of the coating roller 2, and the composite paper passes between the backing roller 3 and the coating roller 2; the glue pool 1 is also provided with a bubble elimination mechanism located on the side where the coating roller 2 rotates out of the glue pool 1; the bubble elimination mechanism includes a support frame group 41, an attached bubble roller 42, a flexible bubble pressing roller group and a reverse transmission component 44; the support frame group 41 is arranged on the glue pool 1; the attached bubble roller 42 is rotatably arranged on the support frame group 41 and is located in the glue pool 1; the flexible bubble pressing roller group includes An inner tube 431 is fixedly arranged on the support frame group 41 and an outer tube 432 is sleeved outside the inner tube 431, the inner diameter of the outer tube 432 is larger than the outer diameter of the inner tube 431, the attached bubble roller 42, the inner tube 431 and the outer tube 432 are all parallel to the coating roller 2, and the outer tube 432 abuts against the outer circumferential surface of the attached bubble roller 42; the end of the coating roller 2 is provided with a coating end shaft coaxial therewith, and the end of the attached bubble roller 42 is provided with a bubble end shaft coaxial therewith, and a reverse transmission component 44 is arranged on the support frame group 41, and the reverse transmission component 44 transmits and connects the coating end shaft and the bubble end shaft, and the coating roller 2 and the attached bubble roller 42 rotate in opposite directions.

[0024] The glue pool 1 is a container for the glue, providing the material basis for the subsequent coating process. In the glue pool 1, a coating roller 2 is placed, which is directly involved in the coating operation of the glue; at the same time, a backing roller 3 is provided on the top of the coating roller 2, and the two are arranged in an upper and lower relative manner, so that the composite paper can pass through the gap between the two, thereby ensuring the smooth transportation and uniform force of the paper in the coating process.

[0025] The glue pool 1 is also integrated with an additional set of bubble elimination mechanisms, which are arranged on the side where the coating roller 2 rotates out of the glue pool 1. When the coating roller 2 takes the glue out of the glue pool 1 during operation, bubbles are easily generated, so the bubble elimination mechanism can eliminate bubbles to prevent the adverse effects of residual bubbles on the quality of the composite paper coating.

[0026] The support frame assembly 41 is erected on the glue pool 1 and serves as a stable support frame for the entire mechanism. It bears various mechanical loads generated by the subsequent operation of various components and ensures the stability and reliability of the overall structure.

[0027] The bubble-attaching roller 42 is rotatably mounted on the support frame assembly 41 and is immersed in the glue pool 1 to be the first component to contact with the bubbles in the glue.

[0028] The flexible bubble pressing roller group includes an inner tube 431 fixed to the support frame group 41, and an outer tube 432 sleeved on the outer side of the inner tube 431. The inner diameter of the outer tube 432 is set to be larger than the outer diameter of the inner tube 431, so as to reserve a specific space gap to meet the subsequent mechanical deformation and buffering requirements. The attached bubble roller 42, the inner tube 431 and the outer tube 432 are all parallel to the coating roller 2 in spatial layout. This parallel layout ensures the coordination and consistency during the operation. Among them, the outer tube 432 is closely abutted against the outer circumference of the attached bubble roller 42, providing a precise force application path for the subsequent bubble squeezing action.

[0029] The end of the coating roller 2 is equipped with a coating end shaft coaxial therewith, and the corresponding end of the bubble-attaching roller 42 is equipped with a bubble-attaching end shaft coaxial therewith. The reverse transmission component 44 is placed on the support frame group 41, firmly connecting the coating end shaft and the bubble-attaching end shaft, thereby achieving a reverse transmission effect, preventing the rotating bubble-attaching roller 42 from pressing bubbles into the glue solution, and causing the coating roller 2 and the bubble-attaching roller 42 to rotate in the opposite direction during operation, providing stable and efficient power support for dynamic squeezing, bubble stripping and other actions in the bubble elimination process, and comprehensively ensuring that the composite paper coating is free of bubble defects, thereby improving the overall quality of the product.

[0030] like Figure 3 and Figure 4 As shown, the reverse transmission component 44 includes a driving shaft 441 connected to the coating end shaft and a driven shaft 442 connected to the bubble attaching end shaft, and reverse transmission occurs between the driving shaft 441 and the driven shaft 442; the support frame group 41 includes a fixed frame 411, a deflection frame 412, a deflection regulator 413 and an extension frame 414; the fixed frame 411 is arranged on the glue pool 1; the deflection regulator 413 includes a fixed end connected to the fixed frame 411 and a movable end close to the coating end shaft, and the movable end of the deflection regulator 413 can deflect relative to its fixed end; the deflection frame 412 is arranged on the movable end of the deflection regulator 413, and the driving shaft 441 is rotatably arranged on the deflection frame 412; the extension frame 414 is arranged on the deflection regulator 413 and close to the glue pool 1, and the driven shaft 442 is rotatably arranged on the extension frame 414 and is coaxially fixedly connected to the bubble attaching end shaft.

[0031] The driving shaft 441 is connected to the coating end shaft in a transmission manner, and is responsible for receiving the power input from the coating roller 2; the driven shaft 442 is connected to the bubble attaching end shaft in a transmission manner, so as to drive the bubble attaching roller 42 to operate.

[0032] The deflection adjuster 413 has a fixed end and a movable end. The deflection frame 412 is assembled on the movable end of the deflection adjuster 413. The driving shaft 441 is rotatably installed inside the deflection frame 412. By utilizing the deflection of the deflection frame 412 along with the movable end, the driving shaft 441 can adjust its own spatial posture in time to adapt to the transmission requirements under different working conditions and maintain a stable power transmission link.

[0033] The driven shaft 442 is rotatably installed in the extension frame 414 and is coaxially fixedly connected with the bubble-attaching end shaft, so that the bubble-attaching roller 42 can follow the driven shaft 442 to operate stably and cooperate with the driving shaft 441 to complete the reverse transmission action, thereby providing a reliable power transmission structure for the coordinated operation of the various components of the bubble elimination mechanism.

[0034] like Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the deflection frame 412 is provided with an open transverse V-shaped groove, and the top and bottom ends of the V-shaped groove are respectively provided with an abutment wheel 4121 and a driving wheel 4122 which are rotatably connected to the deflection frame 412, the abutment wheel 4121 and the driving wheel 4122 abut on the circumferential surface of the coating end shaft, the driving shaft 441 is coaxially fixedly connected with the driving wheel 4122, and the reverse transmission assembly 44 also includes a reverse shaft 443 arranged on the deflection frame 412, a driving gear 444 is arranged on the driving shaft 441, a reverse gear 445 is arranged on the reverse shaft 443, the driving gear 444 is meshed with the reverse gear 445, and the reverse shaft 443 is transmission-connected with the driven shaft 442.

[0035] The abutment wheel 4121 and the driving wheel 4122 are both tightly abutted against the circumferential surface of the coating end shaft. With the help of this circumferential surface contact method, the rotational motion state of the coating end shaft can be efficiently captured. When the driving shaft 441 starts to rotate under the power drive from the coating end shaft, the driving gear 444 rotates accordingly, and drives the reverse shaft 443 to rotate in the opposite direction by virtue of the meshing action between the gears.

[0036] like Figure 4 , Figure 7 and Figure 8 As shown, the deflection regulator 413 includes an upper connecting rod 4131, a lower connecting rod 4132, an adjusting rod 4136 and a spring 4135. One end of the upper connecting rod 4131 and the lower connecting rod 4132 are both rotatably connected to the deflection frame 412, the lower connecting rod 4132 and the upper connecting rod 4131 are arranged in parallel, and the end of the upper connecting rod 4131 away from the deflection frame 412 extends along its length direction to form an adjusting arm; the two ends of the adjusting rod 4136 are respectively rotatably connected to the adjusting arms of the two upper connecting rods 4131, and the adjusting rod 4136 is arranged parallel to the coating roller 2; upper connecting blocks 4137 are equidistantly arranged on the adjusting rod 4136; lower connecting blocks 4114 corresponding to the upper connecting blocks 4137 are equidistantly arranged on the outer side of the fixed frame 411 deviating from the glue pool 1; the two ends of the spring 4135 are respectively fixedly connected to the upper connecting block 4137 and the lower connecting block 4114.

[0037] With the help of the elastic deformation characteristics of spring 4135, when the operating conditions of the equipment fluctuate or certain components need to be fine-tuned, spring 4135 can produce tensile or compressive deformation in a timely manner, and through the linkage with the upper connecting block 4137 and the lower connecting block 4114, a controllable pulling force or pressure is applied to the upper connecting rod 4131 and the lower connecting rod 4132, driving the deflection frame 412 to produce a moderate deflection movement, and then dynamically adjust the contact state of the active wheel 4122, the abutment wheel 4121 and other components with the coating end shaft to maintain the stable operation of the reverse transmission assembly 44.

[0038] like Figure 4 As shown, the fixing frame 411 includes a square tube 4111 extending along the length direction of the glue pool 1, the square tube 4111 abuts against the top of the glue pool 1 and is arranged parallel to the coating roller 2, and positioning seats 4112 are arranged at both ends of the square tube 4111. The positioning seat 4112 is provided with an abutment bolt 4113 that vertically penetrates the positioning seat 4112 and is threadedly connected thereto, and the abutment bolt 4113 abuts against the side of the glue pool 1.

[0039] When installing and debugging the equipment, the operator can rotate the abutment bolt 4113 to cause its end to gradually abut against the corresponding side of the glue pool 1 to fix the fixing frame 411 and the glue pool 1.

[0040] like Figure 8 and Fig.10 As shown, the reverse transmission assembly 44 also includes a sliding block 446, a tensioning shaft 447, and a transmission belt 448; the sliding block 446 is slidably arranged on the lower connecting rod 4132 along the length direction of the lower connecting rod 4132, and a tension spring 4461 is arranged between the sliding block 446 and the end of the lower connecting rod 4132; the tensioning shaft 447 is vertically rotatably arranged on the sliding block 446, a tensioning wheel 4471 is arranged on the tensioning shaft 447, a reverse wheel 4431 is arranged on the reverse shaft 443, and a driven wheel 4421 is arranged on the driven shaft 442; the transmission belt 448 is sleeved on the reverse wheel 4431, the driven wheel 4421 and the tensioning wheel 4471.

[0041] When the reverse transmission assembly 44 starts to operate, the power is transmitted from the driving shaft 441 to the reverse shaft 443 through the meshing of gears, and the reverse shaft 443 drives the reverse wheel 4431 to rotate, and drives the driven shaft 442 to rotate with the help of the transmission belt 448. In this process, if there are changes in the working conditions such as the transmission belt 448 slackening, the sliding block 446 under the action of the tension spring 4461 will slide along the lower connecting rod 4132 in time, driving the tensioning shaft 447 and the tensioning wheel 4471 to adjust their positions, optimizing the tension of the transmission belt 448 in real time, and maintaining stable and efficient power transmission of the entire reverse transmission chain.

[0042] like Figure 8As shown, the reverse transmission assembly 44 also includes a support plate 449 arranged on the deflection frame 412 and the sliding block 446, and two scrapers 4491 are arranged on the support plate 449. The two scrapers 4491 are provided with scraping openings with opening directions opposite to each other and extending along the width direction of the transmission belt 448, and the transmission belt 448 passes through the scraping openings of the two scrapers 4491.

[0043] Two scrapers 4491 are mounted on the support plate 449 to efficiently remove paint contaminated on the transmission belt 448 during power transmission, maintain good friction performance and power transmission stability of the transmission belt 448, and prevent transmission slippage, power loss and other undesirable phenomena caused by paint accumulation.

[0044] like Figure 8 As shown, the lower connecting rod 4132 is provided with a locking block 4133 which slides along its length direction, the locking block 4133 is provided with a sliding groove extending in the vertical direction of the lower connecting rod 4132, the extension frame 414 is slidably arranged on the sliding groove, the extension frame 414 is provided with an upper connecting port extending along its length direction, the locking block 4133 is provided with a locking pin 4134 threadedly connected thereto, one end of the locking pin 4134 is provided with a pin cap abutting against the outer side of the upper connecting port, and the other end of the locking pin 4134 abuts against the lower connecting rod 4132; the extension frame 414 is provided with a lower connecting port parallel to the lower connecting rod 4132, the end of the inner tube 431 is provided with a fixed end shaft 4311 which is coaxial therewith and passes through the lower connecting port, and the fixed end shaft 4311 is provided with a nut 4312 threadedly connected thereto and abutting against the outer side of the lower connecting port.

[0045] A nut 4312 is mounted on the fixed end shaft 4311. The nut 4312 is connected to the fixed end shaft 4311 through threads. By rotating the nut 4312, it is abutted against the outer side of the lower connecting port. Relying on the tightening effect of the nut 4312, the connection stability between the inner tube 431 and the extension frame 414 is strengthened, so that the two form a tight and stable integrated structure. At the same time, the position of the fixed end shaft 4311 on the extension frame 414 can be adjusted.

[0046] like Figure 8 As shown, annular grooves 421 are arranged at equal intervals on the circumferential surface of the foam roller 42 , and annular teeth 4321 that can be engaged with the annular grooves 421 are arranged on the outer circumferential surface of the outer tube 432 .

[0047] The circumferential surface of the bubble attaching roller 42 is regularly and evenly spaced with a row of annular grooves 421, which increases the surface area so that the bubbles can easily fit into the grooves, thereby achieving large-area attachment.

[0048] The bubble-attaching roller 42 and the outer tube 432 rotate continuously relative to each other, and the periodic meshing of the annular teeth 4321 and the annular groove 421 therebetween exerts precise and stable squeezing force on the attached bubbles, which can effectively destroy the bubble structure, causing it to rupture and dissipate, thereby achieving the purpose of quickly eliminating a large number of bubbles.

[0049] A coating method for eliminating bubbles for preparing composite paper, using a coating machine for eliminating bubbles for preparing composite paper, comprising the following steps; Step 1: Install the bubble elimination mechanism on the glue pool 1, and let the composite paper pass through the backing roller 3 and the coating roller 2; Step 2: When the coating roller 2 and the backing roller 3 rotate, the bubble roller 42 rotates and adheres to the bubbles generated in the glue solution; Step 3: The bubbles are broken and disappear under the squeezing action of the bubble roller 42 and the outer tube 432 .

[0050] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A coating machine for eliminating bubbles for preparing composite paper, comprising a glue pool (1), a coating roller (2) arranged in the glue pool (1), and a backing roller (3) arranged on top of the coating roller (2), wherein the composite paper passes between the backing roller (3) and the coating roller (2); characterized in that: The glue liquid pool (1) is also provided with a bubble elimination mechanism located on the side where the coating roller (2) rotates out of the glue liquid pool (1); the bubble elimination mechanism comprises a bubble roller (42) and a flexible bubble pressing roller group; the bubble roller (42) is rotatably arranged in the glue liquid pool (1); the flexible bubble pressing roller group comprises an inner tube (431) fixedly arranged on the support frame group (41) and an outer tube (432) sleeved outside the inner tube (431); the inner diameter of the outer tube (432) is larger than the outer diameter of the inner tube (431); the bubble roller (42), the inner tube (431) and the outer tube (432) are all parallel to the coating roller (2); and the outer tube (432) abuts against the outer circumferential surface of the bubble roller (42).

2. A bubble eliminating coating machine for composite paper preparation according to claim 1, characterized in that: The bubble elimination mechanism further comprises a support frame group (41) and a reverse transmission assembly (44); the end of the coating roller (2) is provided with a coating end shaft coaxial therewith, the end of the bubble attachment roller (42) is provided with a bubble attachment end shaft coaxial therewith, the reverse transmission assembly (44) is arranged on the support frame group (41), the reverse transmission assembly (44) is connected to the coating end shaft and the bubble attachment end shaft, and the coating roller (2) and the bubble attachment roller (42) rotate in opposite directions; the reverse transmission assembly (44) comprises a driving shaft (441) connected to the coating end shaft and a driven shaft (442) connected to the bubble attachment end shaft, and the driving shaft (441) and the driven shaft (442) are connected to each other in opposite directions; the support frame group (41) comprises a fixed frame (411), a biasing frame (412), a biasing frame (413), a biasing frame (414), a biasing frame (415), a biasing frame (416), a biasing frame (417), a biasing frame (418), a biasing frame (419), a biasing frame (421), a biasing frame (422), a biasing frame (424), a biasing frame (425), a biasing frame (426), a biasing frame (427), a biasing frame (428), a biasing frame (429), a biasing frame (430), a biasing frame (431), a biasing frame (432), a biasing frame (433), a biasing frame (434), a biasing frame (435), a biasing frame (436), a biasing frame (437), a biasing frame (438), a biasing frame (439), a biasing frame (431), a biasing frame (431), a biasing frame (432), a biasing frame (433), a biasing frame (434), a biasing frame (435), a biasing frame (436), A rotating frame (412), a deflection regulator (413) and an extension frame (414); the fixed frame (411) is arranged on the glue liquid pool (1); the deflection regulator (413) comprises a fixed end connected to the fixed frame (411) and a movable end close to the coating end shaft, and the movable end of the deflection regulator (413) can deflect relative to its fixed deflection; the deflection frame (412) is arranged on the movable end of the deflection regulator (413), and the driving shaft (441) is rotatably arranged on the deflection frame (412); the extension frame (414) is arranged on the deflection regulator (413) and close to the glue liquid pool (1), and the driven shaft (442) is rotatably arranged on the extension frame (414) and is coaxially fixedly connected to the bubble attachment end shaft.

3. A coating machine for eliminating bubbles for preparing composite paper according to claim 2, characterized in that: The deflection frame (412) is provided with an open transverse V-shaped groove, and the top and bottom ends of the V-shaped groove are respectively provided with an abutment wheel (4121) and a driving wheel (4122) which are rotatably connected to the deflection frame (412), the abutment wheel (4121) and the driving wheel (4122) abut against the circumferential surface of the coating end shaft, the driving shaft (441) and the driving wheel (4122) are coaxially fixedly connected, and the reverse transmission assembly (44) further comprises a reverse shaft (443) provided on the deflection frame (412), a driving gear (444) provided on the driving shaft (441), a reverse gear (445) provided on the reverse shaft (443), the driving gear (444) meshing with the reverse gear (445), and the reverse shaft (443) is transmission-connected to the driven shaft (442).

4. A coating machine for eliminating bubbles for preparing composite paper according to claim 3, characterized in that: The deflection adjuster (413) comprises an upper connecting rod (4131), a lower connecting rod (4132), an adjusting rod (4136) and a spring (4135); both ends of the upper connecting rod (4131) and the lower connecting rod (4132) are rotatably connected to the deflection frame (412); the lower connecting rod (4132) and the upper connecting rod (4131) are arranged in parallel; one end of the upper connecting rod (4131) away from the deflection frame (412) extends along its length direction to form an adjusting arm; both ends of the adjusting rod (4136) are connected to the upper connecting rod (4131) and the lower connecting rod (4132 ... and the upper connecting rod (4131) The adjusting arms are rotatably connected to the two upper connecting rods (4131), respectively; the adjusting rod (4136) is arranged parallel to the coating roller (2); upper connecting blocks (4137) are arranged at equal intervals on the adjusting rod (4136); lower connecting blocks (4114) corresponding to the upper connecting blocks (4137) are arranged at equal intervals on the outside of the fixed frame (411) deviating from the glue pool (1); and the two ends of the spring (4135) are fixedly connected to the upper connecting block (4137) and the lower connecting block (4114), respectively.

5. A bubble eliminating coating machine for composite paper preparation according to any one of claims 2 to 4, characterized in that: The fixing frame (411) comprises a square tube (4111) extending along the length direction of the glue liquid pool (1); the square tube (4111) abuts against the top end of the glue liquid pool (1) and is arranged parallel to the coating roller (2); positioning seats (4112) are arranged at both ends of the square tube (4111); abutment bolts (4113) are arranged on the positioning seats (4112) and vertically penetrate the positioning seats (4112) and are threadedly connected thereto; the abutment bolts (4113) abut against the side of the glue liquid pool (1).

6. The bubble-eliminating coating machine for composite paper preparation according to claim 4, characterized in that: The reverse transmission assembly (44) further comprises a sliding block (446), a tensioning shaft (447), and a transmission belt (448); the sliding block (446) is slidably arranged on the lower connecting rod (4132) along the length direction of the lower connecting rod (4132), and a tension spring (4461) is arranged between the sliding block (446) and the end of the lower connecting rod (4132); the tensioning shaft (447) is vertically rotatably arranged on the sliding block (446), a tensioning wheel (4471) is arranged on the tensioning shaft (447), a reverse wheel (4431) is arranged on the reverse shaft (443), and a driven wheel (4421) is arranged on the driven shaft (442); and the transmission belt (448) is sleeved on the reverse wheel (4431), the driven wheel (4421), and the tensioning wheel (4471).

7. A bubble-eliminating coating machine for composite paper preparation according to claim 6, characterized in that: The reverse transmission assembly (44) further comprises a support plate (449) disposed on the deflection frame (412) and the sliding block (446); two scrapers (4491) are disposed on the support plate (449); the two scrapers (4491) are provided with scraping openings with opening directions opposite to each other and extending along the width direction of the transmission belt (448); the transmission belt (448) passes through the scraping openings of the two scrapers (4491).

8. A bubble eliminating coating machine for composite paper preparation according to claim 6 or 7, characterized in that: The lower connecting rod (4132) is provided with a locking block (4133) which slides along the length direction thereof, and the locking block (4133) is provided with a sliding groove which extends in the vertical direction of the lower connecting rod (4132). The extension frame (414) is slidably provided on the sliding groove, and the extension frame (414) is provided with an upper connecting port which extends along the length direction thereof. The locking block (4133) is provided with a locking pin (4134) which is threadedly connected thereto, and one end of the locking pin (4134) is provided with a pin cap which abuts against the outer side of the upper connecting port, and the other end of the locking pin (4134) abuts against the lower connecting rod (4132); the extension frame (414) is provided with a lower connecting port which is parallel to the lower connecting rod (4132), and the end of the inner tube (431) is provided with a fixed end shaft (4311) which is coaxial with the inner tube (431) and passes through the lower connecting port, and the fixed end shaft (4311) is provided with a nut (4312) which is threadedly connected thereto and abuts against the outer side of the lower connecting port.

9. A coating machine for eliminating bubbles for preparing composite paper according to any one of claims 2-4, 6 and 7, characterized in that: Annular grooves (421) are arranged at equal intervals on the circumferential surface of the foam roller (42), and annular teeth (4321) capable of engaging with the annular grooves (421) are arranged on the outer circumferential surface of the outer tube (432).

10. A coating method for eliminating bubbles for preparing composite paper, characterized in that: A coating machine for eliminating bubbles for preparing composite paper as claimed in any one of claims 1 to 9 is used, comprising the following steps: Step 1: Install the bubble elimination mechanism on the glue pool (1) and allow the composite paper to pass through the backing roller (3) and the coating roller (2); Step 2: When the coating roller (2) and the backing roller (3) rotate, the foaming roller (42) rotates and adheres to the bubbles generated in the glue solution; Step three: the bubbles are broken and disappear under the squeezing action of the bubble roller (42) and the outer tube (432).

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