A coating machine and coating method for eliminating bubbles in the preparation of composite paper

Abstract

The invention relates to the field of coating technology, and in particular to a coating machine and a coating method for eliminating bubbles for preparing composite paper. A bubble eliminating mechanism is arranged in a glue liquid pool, and the machine 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 rotating. 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 coating of the coating roller with a standard thickness and the plastic film tube is worn.

Description

Technical Field

[0001] The present invention relates to the field of coating technology, and specifically to a coating machine and a coating method for eliminating bubbles in the preparation of composite paper. Background Art

[0002] When coating and laminating, it is necessary to coat a liquid coating (adhesive) on a substrate according to process requirements to obtain a flat, smooth and bubble-free coating.

[0003] In the prior art, a coating roll is generally used for coating operations. The principle is that the coating roll rotates in the adhesive liquid in the adhesive tank. A part of the adhesive liquid adheres to the surface of the roll and rotates with the roll. Then, a doctor blade is used to scrape off the excess adhesive liquid on the roll, and then a predetermined thickness or amount of adhesive liquid on the roll is coated on the substrate. When the equipment is running, the coating roll rotates at a high speed in the adhesive liquid (for example, when using an anilox roll for coating, the linear speed of the anilox roll can reach more than 70 m / min). A part of the adhesive liquid is thrown out of the adhesive tank and then flows back into the adhesive tank, and the excess adhesive liquid scraped off from the coating roll by the doctor blade also flows back into the adhesive tank. These two parts of the adhesive liquid come into contact with air during high-speed movement, and a large amount of air will be involved and brought into the coating in the adhesive tank to form tiny bubbles. The bubbles in the coating will reach the coated substrate along with the coating adhered to the coating roll (such as an anilox roll or a plain roll), forming a coated layer with bubbles or an uneven and smooth surface, seriously affecting the product quality. Moreover, the above defects will become more serious with the increase of the rotation speed of the coating roll, and it is also difficult to increase the production speed.

[0004] Chinese Patent Publication No. CN210792402U discloses a coating defoaming device during the coating production process. The defoaming device eliminates the bubbles on the anilox roll by setting an internally inflated plastic film cylinder close to the water outlet side of the anilox roll. When the anilox roll carrying the coating discharges water, the bubbles on it are eliminated through the extrusion of the plastic film cylinder. However, the intervention of the extrusion action of the plastic film cylinder makes it difficult for the coating originally evenly coated on the surface of the anilox roll to maintain the preset standard thickness, and this deviation will interfere with the accurate control of the coating quality in subsequent process steps.

[0005] The rotation mechanism of the plastic film cylinder depends on the frictional drive mode with the anilox roll, which causes the surface material of the plastic film cylinder to be worn more severely, affects the size of the plastic film cylinder, and the inconsistent inflation degree will also affect the diameter of the plastic film cylinder, resulting in a change in the contact pressure between the plastic film cylinder and the anilox roll, having 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, and 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, and 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 end; the deflection frame is arranged on the movable end of the deflection adjuster, and the driving shaft is rotationally 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 rotationally 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:

[0017] Step 1: Install the bubble elimination mechanism on the glue pool, and let the composite paper pass through the back roller and the coating roller.

[0018] Step 2: When the coating roller and the back roller rotate, the bubble-attaching roller rotates and adheres to the bubbles generated in the glue.

[0019] Step 3: The bubbles are broken and disappear under the extrusion of the bubble-attaching roller and the outer tube.

[0020] The beneficial effect of this application compared with the prior art is that: through the bubble elimination mechanism arranged on the liquid outlet side of the coating roller, the bubble elimination mechanism includes a support frame group, a bubble-attaching roller, an inner tube, an outer tube and a reverse transmission component.

[0021] In the process of the coating roller discharging and feeding liquid, if pigments are mixed into the bubbles, these bubbles will, along with the coating process, adhere to the surface of the bubble-attaching roller located on the liquid outlet side of the coating roller. At this time, the continuously rotating bubble-attaching roller will gradually come into contact with the outer tube, and the outer tube will apply a stable and uniform extrusion force to the bubbles on the surface of the bubble-attaching roller, causing the bubbles to be deformed under pressure until they burst and dissipate, thus achieving the purpose of efficiently eliminating bubbles.

[0022] Circular grooves arranged along the length direction are formed on the surface of the bubble-attaching roller, and annular teeth capable of being engaged with the circular grooves are arranged on the circumferential surface of the outer tube. Without changing the length of the bubble-attaching roller, the surface area of the bubble-attaching roller is effectively increased, providing more adhesion areas for the bubbles and further improving the defoaming efficiency. Description of the Drawings

[0023] Figure 1 is the perspective view of a coating machine for eliminating bubbles in the preparation of a composite paper according to the present invention;

[0024] Figure 2 is the schematic diagram of a coating machine for eliminating bubbles in the preparation of a composite paper according to the present invention;

[0025] Figure 3 is the perspective view of the bubble elimination mechanism in a coating machine for eliminating bubbles in the preparation of a composite paper according to the present invention from the first perspective;

[0026] Figure 4 is Figure 3 the partial enlarged view of A;

[0027] Figure 5 is the perspective view of the bubble elimination mechanism in a coating machine for eliminating bubbles in the preparation of a composite paper according to the present invention from the second perspective;

[0028] Figure 6 is Figure 5 the partial enlarged view of B;

[0029] Figure 7It is a three-dimensional exploded view of the support frame group in a composite paper preparation bubble-eliminating coater of the present invention from the first perspective;

[0030] Figure 8 It is a three-dimensional exploded view of the support frame group in a composite paper preparation bubble-eliminating coater of the present invention from the second perspective;

[0031] Figure 9 It is a three-dimensional view of the bubble-attaching roller and the flexible bubble-pressing roller group in a composite paper preparation bubble-eliminating coater of the present invention;

[0032] Figure 10 It is a three-dimensional exploded view of the deflection regulator in a composite paper preparation bubble-eliminating coater of the present invention;

[0033] The reference numerals in the figure are: 1, glue liquid pool; 2, coating roller; 3, back roller; 41, support frame group; 411, fixed frame; 4111, square tube; 4112, positioning seat; 4113, abutting bolt; 4114, lower connecting block; 412, deflection frame; 4121, abutting 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, bubble-attaching roller; 421, annular groove; 431, inner tube; 4311, fixed end shaft; 4312, nut; 432, outer tube; 4321, annular tooth; 44, reverse transmission assembly; 441, driving 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, scraping blade. Detailed implementation manners

[0034] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0035] As Figure 1 , Figure 2 , Figure 3 and Figure 5As shown in the figure, the present application provides a coating machine for eliminating bubbles in the preparation of composite paper, including a glue liquid pool 1, a coating roller 2 disposed in the glue liquid pool 1, and a back roller 3 disposed on top of the coating roller 2. The composite paper passes through the space between the back roller 3 and the coating roller 2. A bubble elimination mechanism is further provided on the glue liquid pool 1 on the side where the coating roller 2 rotates out of the glue liquid pool 1. The bubble elimination mechanism includes a support frame group 41, an air bubble attaching roller 42, a flexible bubble pressing roller group, and a reverse transmission assembly 44. The support frame group 41 is disposed on the glue liquid pool 1. The air bubble attaching roller 42 is rotatably disposed on the support frame group 41 and is located in the glue liquid pool 1. The flexible bubble pressing roller group includes an inner tube 431 fixedly disposed 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 air bubble attaching roller 42, the inner tube 431, and the outer tube 432 are all parallel to the coating roller 2. The outer tube 432 abuts against the outer circumferential surface of the air bubble attaching roller 42. A coating end shaft coaxial with the coating roller 2 is disposed at the end of the coating roller 2. An air bubble attaching end shaft coaxial with the air bubble attaching roller 42 is disposed at the end of the air bubble attaching roller 42. The reverse transmission assembly 44 is disposed on the support frame group 41. The reverse transmission assembly 44 is in transmission connection with the coating end shaft and the air bubble attaching end shaft, and the coating roller 2 and the air bubble attaching roller 42 rotate in opposite directions.

[0036] The glue liquid pool 1 is a container for holding glue liquid, providing a material basis for subsequent coating processes. Inside the glue liquid pool 1, a coating roller 2 is installed, which directly participates in the glue liquid coating operation. At the same time, on top of the coating roller 2, a back roller 3 is equipped. The two are arranged vertically opposite to each other, enabling the composite paper to pass through the gap between them, thereby ensuring the smooth conveyance and uniform stress of the paper during the coating process.

[0037] The glue liquid pool 1 is also additionally integrated with a set of bubble elimination mechanism, which is arranged on the side where the coating roller 2 rotates out of the glue liquid pool 1. When the coating roller 2 rotates and takes the glue liquid out of the glue liquid pool 1 during operation, bubbles are very likely to be generated. Therefore, this bubble elimination mechanism can eliminate bubbles to prevent the adverse effects of bubble residues on the quality of the composite paper coating.

[0038] The support frame group 41 is erected on the glue liquid pool 1, serving as a stable support framework for the entire mechanism, bearing various mechanical loads generated during the operation of subsequent components, and ensuring the stability and reliability of the overall structure.

[0039] The air bubble attaching roller 42 is assembled on the support frame group 41 in a rotatable manner, and its position is immersed inside the glue liquid pool 1, becoming the component that first contacts the bubbles in the glue liquid.

[0040] 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.

[0041] 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.

[0042] 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 connected to the bubble attaching end shaft, and reverse transmission occurs between the driving shaft 441 and the driven shaft; 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 is rotatably arranged on the extension frame 414 and is coaxially fixedly connected to the bubble attaching end shaft.

[0043] 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 is connected to the bubble attaching end shaft in a transmission manner, so as to drive the bubble attaching roller 42 to operate.

[0044] 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.

[0045] The driven shaft is rotatably installed in the extension frame 414 and is coaxially and fixedly connected to the bubble-attached end shaft, enabling the bubble-attached roller 42 to rotate stably following the driven shaft and cooperate with the driving shaft 441 to complete the reverse transmission action, thereby providing a reliable power transmission structure for the coordinated operation among the components of the bubble elimination mechanism.

[0046] As Figure 4 、 Figure 6 、 Figure 7 and Figure 8 As shown in, a V-shaped groove with a horizontal opening is provided on the deflection frame 412. An abutting wheel 4121 and a driving wheel 4122 rotatably connected to the deflection frame 412 are respectively provided at the top and bottom of the V-shaped groove. The abutting wheel 4121 and the driving wheel 4122 abut against the circumferential surface of the coating end shaft. The driving shaft 441 is coaxially and fixedly connected to the driving wheel 4122. The reverse transmission assembly 44 further includes a reverse shaft 443 provided on the deflection frame 412. A driving gear 444 is provided on the driving shaft 441, and a reverse gear 445 is provided on the reverse shaft 443. The driving gear 444 meshes with the reverse gear 445, and the reverse shaft 443 is in transmission connection with the driven shaft.

[0047] Both the abutting wheel 4121 and the driving wheel 4122 tightly abut against the circumferential surface of the coating end shaft. By means 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 driven by the power from the coating end shaft, the driving gear 444 rotates accordingly, and drives the reverse shaft 443 to rotate in the reverse direction by virtue of the meshing action between the gears.

[0048] As Figure 4 、 Figure 7 and Figure 8 As shown in, the deflection regulator 413 includes an upper connecting rod 4131, a lower connecting rod 4132, an adjusting rod 4136 and a spring 4135. One ends of both 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 departing from the deflection frame 412 extends along its length direction to form an adjusting arm; both ends of the adjusting rod 4136 are rotatably connected to the adjusting arms of the two upper connecting rods 4131, and the adjusting rod 4136 is arranged in parallel with 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; both ends of the spring 4135 are fixedly connected to the upper connecting block 4137 and the lower connecting block 4114 respectively.

[0049] With the elastic deformation characteristics of the spring 4135, when the operating conditions of the equipment fluctuate or when some components need to be finely adjusted, the spring 4135 can timely produce tensile or compressive deformation. Through the linkage with the upper connecting block 4137 and the lower connecting block 4114, controllable tensile or compressive forces are applied to the upper connecting rod 4131 and the lower connecting rod 4132, driving the deflection frame 412 to produce an appropriate deflection action, thereby dynamically adjusting the contact states of components such as the driving wheel 4122 and the abutting wheel 4121 with the coating end shaft, and maintaining the stable operation of the reverse transmission assembly 44.

[0050] As Figure 4 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. Positioning seats 4112 are provided at both ends of the square tube 4111. An abutting bolt 4113 vertically penetrating and threadedly connected to the positioning seat 4112 is provided on the positioning seat 4112, and the abutting bolt 4113 abuts against the side surface of the glue pool 1.

[0051] When installing and debugging the equipment, the operator can rotate the abutting bolt 4113 to make its end gradually abut against the corresponding side surface of the glue pool 1, thereby fixing the fixing frame 411 to the glue pool 1.

[0052] As Figure 8 and Figure 10 shown, the reverse transmission assembly 44 further 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. A tension spring 4461 is provided 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 provided on the tensioning shaft 447. A reverse wheel 4431 is provided on the reverse shaft 443, and a driven wheel 4421 is provided on the driven shaft. The transmission belt 448 is sleeved on the reverse wheel 4431, the driven wheel 4421, and the tensioning wheel 4471.

[0053] When the reverse transmission assembly 44 starts to operate, power is transmitted from the driving shaft 441 to the reverse shaft 443 through gear meshing. The reverse shaft 443 drives the reverse wheel 4431 to rotate, and drives the driven shaft to rotate by means of the transmission belt 448. During this process, if there are working condition changes such as the slackening of the transmission belt 448, the sliding block 446 under the action of the tension spring 4461 will timely slide along the lower connecting rod 4132, driving the tensioning shaft 447 and the tensioning wheel 4471 to adjust their positions, and optimizing the tension degree of the transmission belt 448 in real time to maintain the stable and efficient power transmission of the entire reverse transmission link.

[0054] As Figure 8As shown, the reverse transmission assembly 44 further includes a support plate 449 disposed on the deflection frame 412 and the slider 446. Two scraping blades 4491 are disposed on the support plate 449. The two scraping blades 4491 are provided with scraping openings having opposite opening directions and extending along the width direction of the transmission belt 448. The transmission belt 448 passes through the scraping openings of the two scraping blades 4491.

[0055] Two scraping blades 4491 are assembled on the support plate 449, which can efficiently remove the paint contaminated on the transmission belt 448 during the power transmission process, maintain the good friction performance and power transmission stability of the transmission belt 448, and prevent adverse phenomena such as transmission slippage and power loss caused by paint accumulation.

[0056] As Figure 8 shown, a locking block 4133 that slides along the length direction is disposed on the lower connecting rod 4132. A sliding groove extending in the direction perpendicular to the lower connecting rod 4132 is disposed on the locking block 4133. The extension frame 414 is slidably disposed on the sliding groove. An upper connecting port extending along the length direction is disposed on the extension frame 414. A locking pin 4134 threadedly connected thereto is disposed on the locking block 4133. One end of the locking pin 4134 is provided with a pin cap that abuts against the outside of the upper connecting port, and the other end of the locking pin 4134 abuts against the lower connecting rod 4132; a lower connecting port parallel to the lower connecting rod 4132 is disposed on the extension frame 414. A fixed end shaft 4311 coaxial with and passing through the lower connecting port is disposed at the end of the inner tube 431. A nut 4312 that is threadedly connected thereto and abuts against the outside of the lower connecting port is disposed on the fixed end shaft 4311.

[0057] On the fixed end shaft 4311, a nut 4312 is assembled. The nut 4312 is threadedly connected to the fixed end shaft 4311. By rotating the nut 4312 to abut against the outside of the lower connecting port, relying on the fastening 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, and at the same time, the position of the fixed end shaft 4311 on the extension frame 414 can be adjusted.

[0058] As Figure 8 shown, annular grooves 421 are equidistantly disposed on the circumferential surface of the bubble-attaching roller 42. Annular teeth 4321 that can be engaged with the annular grooves 421 are disposed on the outer circumferential surface of the outer tube 432.

[0059] A row of annular grooves 421 are regularly distributed at equal intervals on the circumferential surface of the bubble-attaching roller 42, increasing the surface area so that the bubbles can easily fit into the grooves, realizing large-area attachment.

[0060] The bubble-attached roller 42 and the outer tube 432 rotate relative to each other continuously. The periodic meshing between the annular teeth 4321 and the annular groove 421 between the two will apply an accurate and stable extrusion force to the attached bubbles, efficiently destroy the bubble structure, cause them to burst and dissipate, and achieve the purpose of quickly eliminating a large number of bubbles.

[0061] A coating method for eliminating bubbles in the preparation of composite paper, using a coating machine for eliminating bubbles in the preparation of composite paper, comprising the following steps:

[0062] Step 1, install the bubble elimination mechanism on the glue pool 1, and pass the composite paper through the back roller 3 and the coating roller 2;

[0063] Step 2, when the coating roller 2 and the back roller 3 rotate, the bubble-attached roller 42 rotates and adheres to the bubbles generated in the glue;

[0064] Step 3, the bubbles are broken and disappear under the extrusion of the bubble-attached roller 42 and the outer tube 432.

[0065] The above embodiments only represent one or several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A coating machine for eliminating bubbles in the preparation of composite paper, comprising a glue pool (1), a coating roller (2) arranged in the glue pool (1), and a back roller (3) arranged on top of the coating roller (2), and the composite paper passes through between the back roller (3) and the coating roller (2); characterized in that, There is also a bubble elimination mechanism provided on the glue solution pool (1) on the side where the coating roller (2) rotates out of the glue solution pool (1); the bubble elimination mechanism includes an attached bubble roller (42) and a flexible bubble pressing roller group; the attached bubble roller (42) is rotatably arranged in the glue solution pool (1); the flexible bubble pressing roller group includes 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 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 bubble elimination mechanism also includes a support frame group (41) and a reverse transmission assembly (44); an end of the coating roller (2) is provided with a coating end shaft coaxial with it, an end of the attached bubble roller (42) is provided with an attached bubble end shaft coaxial with it, the reverse transmission assembly (44) is arranged on the support frame group (41), the reverse transmission assembly (44) is in transmission connection with the coating end shaft and the attached bubble end shaft, and the coating roller (2) and the attached bubble roller (42) rotate in opposite directions; the reverse transmission assembly (44) includes a driving shaft (441) in transmission connection with the coating end shaft and a driven shaft in transmission connection with the attached bubble end shaft, and reverse transmission occurs between the driving shaft (441) and the driven shaft; the support frame group (41) includes a fixed frame (411), a deflection frame (412), a deflection adjuster (413) and an extension frame (414); the fixed frame (411) is arranged on the glue solution pool (1); the deflection adjuster (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 adjuster (413) can deflect relative to its fixed end; the deflection frame (412) is arranged on the movable end of the deflection adjuster (413), and the driving shaft (441) is rotatably arranged on the deflection frame (412); the extension frame (414) is arranged on the deflection adjuster (413) and close to the glue solution pool (1), and the driven shaft is rotatably arranged on the extension frame (414) and is coaxially fixedly connected to the attached bubble end shaft; annular grooves (421) are equidistantly arranged on the circumferential surface of the attached bubble roller (42), and annular teeth (4321) capable of being engaged with the annular grooves (421) are arranged on the outer circumferential surface of the outer tube (432).

2. The coating machine for eliminating bubbles in the preparation of composite paper according to claim 1, characterized in that, A V-shaped groove with a horizontal opening is arranged on the deflection frame (412), a contact wheel (4121) and a driving wheel (4122) rotatably connected to the deflection frame (412) are respectively arranged at the top end and the bottom end of the V-shaped groove, the contact wheel (4121) and the driving wheel (4122) abut against the circumferential surface of the coating end shaft, the driving shaft (441) is coaxially fixedly connected to the driving wheel (4122), 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 engaged with the reverse gear (445), and the reverse shaft (443) is in transmission connection with the driven shaft.

3. A coating machine for eliminating bubbles in the preparation of composite paper according to claim 2, 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.

4. A coating machine for eliminating bubbles in the preparation of composite paper according to any one of claims 2-3, 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).

5. A coating machine for eliminating bubbles in the preparation of composite paper according to claim 3, 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; and the transmission belt (448) is sleeved on the reverse wheel (4431), the driven wheel (4421), and the tensioning wheel (4471).

6. The coating machine for eliminating bubbles in the preparation of composite paper according to claim 5, 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).

7. A coating machine for eliminating bubbles in the preparation of composite paper according to claim 5 or 6, characterized in that, A locking block (4133) that slides along the length direction is provided on the lower connecting rod (4132). A chute extending in the direction perpendicular to the lower connecting rod (4132) is provided on the locking block (4133). An extension frame (414) is slidably provided on the chute. An upper connection port extending along the length direction of the extension frame (414) is provided on the extension frame (414). A locking pin (4134) threadedly connected to the locking block (4133) is provided on the locking block (4133). A pin cap that abuts against the outside of the upper connection port is provided at one end of the locking pin (4134). The other end of the locking pin (4134) abuts against the lower connecting rod (4132). A lower connection port parallel to the lower connecting rod (4132) is provided on the extension frame (414). A fixed end shaft (4311) that is coaxial with and penetrates the lower connection port is provided at the end of the inner tube (431). A nut (4312) that is threadedly connected to the fixed end shaft (4311) and abuts against the outside of the lower connection port is provided on the fixed end shaft (4311).

8. A coating method for eliminating bubbles in the preparation of composite paper, characterized in that, Using a coating machine for eliminating bubbles in the preparation of a composite paper as described in any one of claims 1-7, comprising the following steps: Step 1, installing the bubble elimination mechanism on the glue pool (1) and passing the composite paper through the back roller (3) and the coating roller (2); Step 2, when the coating roller (2) and the back roller (3) rotate, the bubble-attaching roller (42) rotates and adheres to the bubbles generated in the glue; Step 3, the bubbles are broken and disappear under the extrusion of the bubble-attaching roller (42) and the outer tube (432).

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