Coating machine winding device

Abstract

The present invention relates to a winding device for a coating machine, and belongs to the technical field of winding devices. The present invention includes a winding assembly and a cutting knife assembly. The winding assembly includes a turning frame extending forward and backward of a rotating axis, two rollers symmetrically distributed left and right mounted on the turning frame, and two groups of traction roller groups symmetrically distributed up and down. The cutting knife assembly includes a knife frame and a cutting knife mounted on the knife frame, and the knife frame is movably mounted on the frame; the traction roller group includes two inner traction rollers distributed left and right, a rubber belt sleeved on the inner traction roller, and a belt driving mechanism for driving the inner traction roller to rotate, and a plurality of adsorption grooves arranged in an array are provided on the outer surface of the rubber belt, and the cutting knife assembly also includes a clamping roller extending forward and backward mounted on the knife frame; the clamping roller is located on the upper side of the cutting knife and is opposite to the roller surface of the inner traction roller on the left side of the working traction roller group. When changing rolls, the present invention can reduce the wrinkles generated at the head and tail of the material, and the quality of the finished product made by winding is better.

Description

Technical Field

[0001] The invention relates to the technical field of winding devices, and in particular to a winding device for a coating machine. Background Art

[0002] A coater is a mechanical device used to evenly apply paint, glue or other liquid materials on the surface of a substrate. Coating machines are widely used in the surface treatment of various materials such as paper, plastic film, metal foil, textiles, etc. During the operation of the coater, the raw material is first unwound from the unwinding unit, and then the coating is evenly applied to the surface of the substrate through the coating unit. After that, the drying of the coating is accelerated by the heating device, and then the coated finished material is wound into a roll. In the process of winding the coated finished material into a roll, when the finished roll reaches a certain length or weight, the finished roll needs to be taken down for subsequent packaging or storage, and replaced with a new roll to wind the material. This step is called roll change.

[0003] During the production process, an automated roll changing device is generally used to complete the roll changing process, such as an automatic roll changing device for a lithium battery coating machine disclosed in the patent with the authorization announcement number CN207998341U, which includes a rotatable rotating bracket assembly and a cutter assembly, the rotating bracket assembly includes a rotating plate symmetrically arranged in the vertical direction, the rotating plate is cross-shaped as a whole, and the first roller and the second roller are respectively provided at both ends of the horizontal plate surface of the rotating plate, and the first roller and the second roller are respectively provided at both ends of the vertical plate surface of the rotating plate; the cutter assembly includes a third roller arranged parallel to the first roller and a cutter arranged at the lower end of the third roller, the two ends of the cutter are respectively connected to the two ends of the third roller through the second connecting bracket, the third roller is driven to rotate by the second cylinder, and the third roller is driven to translate by the power device.

[0004] When changing rolls, the device first rotates the rotating plate to make the double-sided adhesive on the surface of the second roller contact the material, and then cuts the material between the first roller and the second roller with a cutter, forming the tail of the material wound on the first roller and the head of the material to be wound on the second roller. The tail of the material continues to be wound with the first roller, and the head of the material is wound on the second roller. However, after the material is cut, the tension at the cutting position disappears, and it is easy to rebound and wrinkle. The wrinkles at the tail of the material will cause the end of the finished roll wound on the first roller to be uneven, affecting the quality of the wound product. Summary of the invention

[0005] The invention provides a winding device for a coating machine, so as to solve the technical problem in the prior art that wrinkles are easily generated at the tail of the coating machine when changing the roll, thus affecting the quality of the wound finished product.

[0006] In order to solve the above problems, the present invention provides a coating machine winding device adopts the following technical solutions:

[0007] A winding device for a coating machine includes a winding assembly and a cutting knife assembly. The winding assembly includes a turning frame with a rotating axis extending forward and backward and two rollers symmetrically distributed on the turning frame, and two groups of traction rollers symmetrically distributed up and down. The positions of the two rollers can be swapped with the rotation of the turning frame to form: a standby roller and a working roller distributed on the left and right. The two traction roller groups can be swapped with the rotation of the turning frame to form: a working traction roller group and a standby traction roller group distributed up and down. The working roller is used to wind up the film, the working traction roller group is used to guide the film to the working roller, and the standby roller is used to wind up the material head formed when the film is cut; the cutting knife assembly includes a knife frame and a cutting knife installed on the knife frame. The knife frame is movably installed on the frame. The cutting knife is used to move rightward with the knife frame to cut off the film between the working traction roller group and the standby roller.

[0008] The traction roller group includes two inner traction rollers distributed on the left and right, a rubber belt sleeved on the inner traction rollers, and a belt driving mechanism for driving the inner traction rollers to rotate. The outer surface of the rubber belt is provided with a plurality of adsorption grooves arranged in an array, and the adsorption grooves are used to form negative pressure when squeezed to absorb the film tightly.

[0009] The cutting knife assembly also includes a pressure roller installed on the knife frame and extending forward and backward; the pressure roller is located on the upper side of the cutting knife and is opposite to the roller surface of the inner traction roller on the left side of the working traction roller group, so that when the pressure roller moves to the right with the knife frame, it can squeeze the rubber belt with the inner traction roller, thereby deforming the adsorption groove on the rubber belt to suck the tail of the film that is in contact with the inner traction roller.

[0010] With the above technical solution, when the cutter assembly moves to the right, the cutter cuts the film, the pressure roller presses the tail of the film onto the rubber belt and squeezes the rubber belt with the inner traction roller on the left, so that the adsorption groove deforms to generate negative pressure to adsorb the tail of the film onto the rubber belt, avoiding the tail of the film from rebounding and generating wrinkles due to loss of tension during the continuous winding process, and the quality of the finished product obtained by winding is better. The tail of the film is fixed to the rubber belt by the negative pressure adsorption effect of the adsorption groove. Compared with setting a pressure roller above the rubber belt to press the film to fix the film, the tail of the film can be always fixed to the rubber belt during the winding process, and the tail of the film always has tension before it is completely wound onto the working roller, resulting in less deformation and wrinkles.

[0011] Furthermore, the cutting knife assembly also includes a smoothing brush installed on the knife holder, and the right end of the smoothing brush lags behind the blade of the cutting knife in the left-right direction, and the smoothing brush is located on the lower side of the cutting knife; the knife holder is movably installed on the frame along the left-right direction and the up-down direction at the same time, and the smoothing brush moves downward with the knife holder before moving to the right with the knife holder so that the lower end of the smoothing brush is lower than the upper end of the outer circumferential surface of the standby roller, and the smoothing brush is used to press the material head that falls on the standby roller when it moves to the right with the knife holder.

[0012] With the above technical solution, when the cutter assembly moves to the right, the smoothing brush pushes the material head formed by cutting, generates friction with the material head, smoothes the material head and makes it adhere to the standby roller evenly under the action of electrostatic adsorption, avoiding the material head from rebounding and deforming to produce wrinkles, making the film winding smoother. In addition, the cutter assembly moves upwards during the resetting process, so that the bottom end of the smoothing brush is higher than the upper end of the outer peripheral surface of the standby roller, and then moves to the left to retreat, preventing the smoothing brush from dragging the material head attached to the standby roller off during the retreat process.

[0013] Furthermore, the traction roller group also includes two outer traction rollers arranged at intervals on the left and right, the spacing between the two outer traction rollers is smaller than the spacing between the two inner traction rollers, the two outer traction rollers are located on the side of the two inner traction rollers that is away from the roller cylinder and are correspondingly arranged between the two inner traction rollers in the up and down directions, and the rubber belt is sleeved on the outside of the two outer traction rollers and the two inner traction rollers.

[0014] By adopting the above technical solution, an outer traction roller is set up, so that the film passes through the inner traction roller and the outer traction roller and then is wound onto the working roller. Compared with only setting two inner traction rollers, the movement path of the film is longer and can be more fully in contact with the outside world for heat dissipation. The outer traction roller is higher than the inner traction roller, which is more conducive to guiding and supporting the tensioned film, and can reduce the probability of wrinkles in the film.

[0015] Furthermore, a push roller having the same height as the standby roller is provided below the cutter assembly, and the push roller is movably mounted on the frame along the left and right directions, and is used to press the film to be cut against the standby roller when moving to the right.

[0016] By adopting the above technical solution, the film is pressed against the working roller by the push roller before cutting, so that the material head can be fixed on the working roller for winding after the film is cut, preventing the material head from slipping.

[0017] Furthermore, the tool holder is provided with two shaft sections arranged at an interval front and back, and each of the two shaft sections is rotatably mounted with a connecting rod, and the pressure roller is rotatably connected between the ends of the two connecting rods facing away from the shaft ends; a torsion spring is connected between the connecting rod and the corresponding shaft section, and the torsion spring is used to elastically press the pressure roller onto the inner traction roller located on the left side of the working traction roller group.

[0018] With the above technical solution, since the cutting knife needs to have a higher cutting speed, the knife holder moves to the right with the cutting knife, smoothing brush and pressure roller at a faster speed. The pressure roller can rotate on the knife holder and is connected to the knife holder with a torsion spring, which can prevent the pressure roller from directly colliding with the tail of the material, the rubber belt and the standby roller and causing mechanical damage.

[0019] Furthermore, a limit pin parallel to the shaft segment is provided on the tool holder, and an end of the connecting rod for being mounted on the shaft segment is provided with an arc-shaped limit groove coaxial with the shaft segment, and the arc-shaped limit groove is located on the upper side of the shaft segment. After the connecting rod rotates to the left to cause the torsion spring to produce a set torsion amount, the limit pin can be inserted into the left side of the arc-shaped limit groove to pre-tighten the connecting rod and the clamping roller.

[0020] By adopting the above technical solution, a limit pin is provided on the tool holder and an arc-shaped limit groove is provided on the connecting rod. The position of the arc-shaped limit groove is set to a state in which the limit pin can be inserted only after the torsion spring is twisted to a certain extent. In this way, the clamping roller has a certain preload force in the initial state. When the clamping roller presses on the rubber belt, it can generate a greater clamping force on the rubber belt, which is conducive to deforming the rubber belt.

[0021] Furthermore, the turning frame includes a turning shaft extending forward and backward, two transverse support plates, two first vertical support plates and two second vertical support plates; the two transverse support plates are connected to the turning shaft and are arranged with a front-to-back interval, and the two rollers are installed between the two transverse support plates and are respectively arranged on the left and right sides of the turning shaft; the two first vertical support plates are connected to the upper half of the turning shaft and are arranged with a front-to-back interval, and the two first vertical support plates are located between the two transverse support plates; the two second vertical support plates are symmetrically connected to the two first vertical support plates on the lower half of the turning shaft, and a group of traction roller groups are respectively installed between the two first vertical support plates and between the two second vertical support plates.

[0022] By adopting the above technical solution, the two rollers and the two groups of traction rollers are respectively installed on different support plates, and the transverse support plate used to install the rollers and the first vertical support plate and the second vertical support plate used to install the traction roller group are located at different positions in the axial direction of the flip shaft, which is beneficial to balancing the axial force of the flip shaft, avoiding excessive concentration of force on the flip shaft, and helping to extend the service life of the flip shaft.

[0023] Furthermore, a power mechanism is provided on the left side of the cutting knife assembly, and the power mechanism includes a lifting drive member and a transverse driving member. The lifting output end of the lifting drive member is connected to a bracket, and the transverse driving member is installed on the bracket. The transverse driving member has a driving output end that can reciprocate left and right. The driving output end of the transverse driving member is connected to a movable plate, and a cutting drive member is installed on the movable plate. The cutting drive member has a driving output end that can reciprocate left and right, and the knife holder is connected to the driving output end of the cutting drive member.

[0024] By adopting the above technical solution, the lifting drive and the lateral drive are used to significantly adjust the position of the knife holder so that the cutting knife moves to a suitable cutting position, and the cutting drive is used to drive the cutting knife to move left and right to cut the film, thereby improving the cutting efficiency.

[0025] The beneficial effect of a coating machine winding device provided by the present invention is that by respectively arranging a pressure roller and a smoothing brush on the upper and lower sides of the cutting knife, when cutting, the pressure roller cooperates with the inner traction roller located on the left side of the working traction roller group to squeeze the rubber belt, causing the rubber belt to deform, squeezing out the air in the adsorption groove on the rubber belt, so that negative pressure is formed in the adsorption groove, so that the material tail formed by cutting can be adsorbed on the rubber belt, so that the material tail has tension, and the material tail is prevented from deforming and wrinkling during the continuous winding process. By coordinating the movement of the smoothing brush with the rotation of the standby roller, the formed material head is flatly attached to the standby roller, avoiding deformation and wrinkling at the material head, and the film is wound more smoothly, and the quality of the wound finished product is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0027] Figure 1 A schematic diagram of the structure of a coating machine winding device provided by the present invention Figure 1 ;

[0028] Figure 2 A schematic diagram of the structure of a coating machine winding device provided by the present invention Figure 2 ;

[0029] Figure 3 A schematic diagram of the structure of a coating machine winding device provided by the present invention Figure 3 ;

[0030] Figure 4 A schematic diagram of the structure of a coating machine winding device provided by the present invention Figure 4 ;

[0031] Figure 5 A schematic diagram of the structure of a coating machine winding device provided by the present invention Figure 5 ;

[0032] Figure 6 A schematic diagram of the structure of a knife holder in a winding device of a coating machine provided by the present invention;

[0033] Figure 7 A schematic diagram of the structure of a pressure roller in a winding device of a coating machine provided by the present invention;

[0034] Figure 8 A schematic diagram of the state of a winding device of a coating machine before cutting provided by the present invention;

[0035] Fig. 9A schematic diagram of the state of a winding device of a coating machine provided by the present invention during cutting;

[0036] Fig.10 This is a simplified diagram of the state of a winding device of a coating machine after cutting provided by the present invention.

[0037] Description of reference numerals:

[0038] 1. Frame; 101. First frame body; 102. Second frame body; 2. Standby roller; 3. Working roller; 4. Turning shaft; 5. Horizontal support plate; 6. First vertical support plate; 7. Outer traction roller; 8. Inner traction roller; 9. Rubber belt; 901. Adsorption groove; 10. Push roller; 11. Pressing roller; 12. Cutting knife; 13. Smoothing brush; 14. Second vertical support plate; 15. Knife holder; 151. Support frame; 152. Slide plate; 16 , connecting rod; 161, arc-shaped limit groove; 17, shaft section; 18, torsion spring; 19, limit pin; 20, lifting drive member; 21, bracket; 22, cutting drive member; 23, sliding block; 24, pushing drive member; 25, film; 251, material head; 252, material tail; 26, transverse drive member; 27, moving plate; 28, first drive member; 29, second drive member; 30, synchronous belt transmission assembly; 31, first push rod; 32, second push rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] The following is an embodiment of a winding device for a coating machine provided by the present invention:

[0041] like Figure 1-Figure 10 As shown, a winding device for a coating machine includes a frame 1, a winding assembly, a cutting knife assembly, a power mechanism, a push roller 10 and a push driving member 24. The winding device for the coating machine is used to change the roll during the process of winding the film 25.

[0042] like Figure 1 As shown, the rack 1 is arranged on a horizontal ground, and the rack 1 includes a first frame body 101 and a second frame body 102 arranged at intervals from left to right. The first frame body 101 and the second frame body 102 are connected into one by a connecting body, which is not shown in the figure.

[0043] like Figure 1-Figure 5 As shown, the winding assembly includes a turning frame, a roller and a traction roller group.

[0044] like Figure 2 , Figure 3 As shown, the turning frame is rotatably mounted on the second frame body 102 , and the turning frame includes a turning shaft 4 , a transverse support plate 5 , a first vertical support plate 6 and a second vertical support plate 14 .

[0045] The turning shaft 4 extends along the front-rear direction, and the turning shaft 4 is rotatably mounted on the second frame portion 102 .

[0046] There are two transverse support plates 5 , which are spaced apart in the front-rear direction. Both transverse support plates 5 are perpendicular to the axis of the flip shaft 4 and are fixedly connected to the flip shaft 4 .

[0047] There are two first vertical support plates 6, which are arranged at intervals in the front-to-back direction and located between the two transverse support plates 5. The two first vertical support plates 6 are both perpendicular to the axis of the flip shaft 4 and fixedly connected to the upper half of the flip shaft 4.

[0048] There are two second vertical support plates 14 , and the two second vertical support plates 14 are respectively connected to the two first vertical support plates 6 symmetrically on the lower half of the flip shaft 4 .

[0049] like Figure 2 As shown, two rollers are provided, both of which extend in the front-to-back direction and are installed between two transverse support plates 5. The two rollers are respectively arranged on the left and right sides of the turning axis 4. The roller located on the left side after the turning frame is turned is the standby roller 2, and the roller located on the right side after the turning frame is turned is the working roller 3. The transverse support plate 5 located on the rear side is provided with a first driving member 28 and a second driving member 29 for driving the standby roller 2 and the working roller 3 to rotate, respectively. The first driving member 28 and the second driving member 29 are specifically driving motors.

[0050] like Figure 2 and Figure 4 As shown, a first push rod 31 is rotatably installed on the left side of each of the two transverse support plates 5, and one of the first push rods 31 can move in the front-rear direction so that the standby roller 2 can be clamped between the two first push rods 31, or can be separated from the two first push rods 31. The first driving member 28 is connected to one of the first push rods 31 through a belt transmission structure, and the standby roller 2 is driven to rotate by driving the first push rod 31 to rotate.

[0051] like Figure 2As shown, a second push rod 32 is rotatably installed on the right side of each of the two transverse support plates 5, and one of the second push rods 32 can move in the front-rear direction so that the working roll 3 can be clamped between the two second push rods 32, or can be separated from the two second push rods 32. The second driving member 29 is connected to one of the second push rods 32 through a belt transmission structure, and the working roll 3 is driven to rotate by driving the second push rod 32 to rotate.

[0052] like Figure 3 , Figure 4 , Figure 5 As shown, there are two traction roller groups, which are respectively installed between the two first vertical support plates 6 and between the two second vertical support plates 14, and the two traction roller groups are symmetrically arranged up and down. The traction roller group located on the upper side after the turning frame is turned over is the working traction roller group, and the traction roller group located on the lower side after the turning frame is turned over is the standby traction roller group.

[0053] The traction roller set comprises two inner traction rollers 8, two outer traction rollers 7, a rubber belt 9 and a belt driving mechanism.

[0054] The inner traction roller 8 and the outer traction roller 7 both extend in the front-to-back direction, the two inner traction rollers 8 are arranged at intervals in the left-right direction and are rotatably installed between the two first vertical support plates 6 or between the two second vertical support plates 14, and the two outer traction rollers 7 are arranged at intervals in the left-right direction and are rotatably installed between the two first vertical support plates 6 or between the two second vertical support plates 14. The spacing dimension between the two inner traction rollers 8 is greater than the spacing dimension between the two outer traction rollers 7, the inner traction roller 8 is located on the side close to the turning axis 4, the outer traction roller 7 is located on the side away from the turning axis 4, and the two outer traction rollers 7 are correspondingly located between the two inner traction rollers 8 in the up-down direction.

[0055] like Figure 2 , Figure 4 As shown, the rubber belt 9 is sleeved on the outer sides of the two inner traction rollers 8 and the two outer traction rollers 7. A plurality of adsorption grooves 901 are arranged on the outer surface of the rubber belt 9, and the adsorption grooves 901 are arranged in a plurality of rows arranged at equal intervals along the conveying direction of the conveyor belt, and each row includes a plurality of adsorption grooves 901 arranged at equal intervals in the front-to-back direction.

[0056] like Figure 3 As shown, the belt drive mechanism is used to drive the rubber belt 9 to rotate. The belt drive mechanism includes a drive motor and a synchronous belt transmission assembly 30. The drive motor is installed on one of the first vertical support plates 6 or the second vertical support plate 14. The drive motor drives the inner traction roller 8 on the right side of the corresponding traction roller group to rotate through the synchronous belt transmission assembly 30, thereby driving the rubber belt 9 to rotate.

[0057] In the working state, the film 25 is guided from the workstation of the previous process to the side of the standby roller 2 by the guide roller, and is wound on the working roller 3 by the traction of the working traction roller group.

[0058] like Figure 6 As shown, the cutting knife assembly includes a knife holder 15, a cutting knife 12, a smoothing brush 13 and a pressure roller 11.

[0059] like Figure 6 As shown, the tool holder 15 is U-shaped and includes a support frame 151 extending in the front-to-back direction and two slide plates 152 vertically connected to the front and rear ends of the support frame 151, and two shaft sections 17 arranged at intervals in the front and rear directions are provided on the support frame 151. Figure 4 , Figure 5 As shown, the two slide plates 152 are assembled on the first frame body 101 in a guided sliding manner along the left-right direction.

[0060] The cutter 12 is connected to the bottom of the support frame 151, and the cutting edge of the cutter 12 is arranged rightward and protrudes rightward from the support frame 151. The cutter 12 includes a plurality of blades arranged in parallel in front and back order, and the blades are connected to the support frame 151 by bolts.

[0061] The smoothing brush 13 extends in the front-to-back direction. The smoothing brush 13 is connected to the support frame 151 and is located below the cutting knife 12. The smoothing brush 13 lags behind the blade of the cutting knife 12 from left to right, that is, the blade of the cutting knife 12 protrudes rightward from the smoothing brush 13. The smoothing brush 13 is specifically a brush.

[0062] like Figure 6 , Figure 7 As shown, the clamping roller 11 extends in the front-to-back direction, and a connecting rod 16 is hinged at each of the front and rear ends of the clamping roller 11. The ends of the two connecting rods 16 facing away from the clamping roller 11 are respectively rotatably mounted on the two shaft sections 17, and a torsion spring 18 is connected between the connecting rod 16 and the corresponding shaft section 17. An arc-shaped limiting groove 161 is provided on the portion of the connecting rod 16 that is used to be mounted on the outside of the shaft section 17, and the arc-shaped limiting groove 161 is coaxial with the shaft section 17. The front and rear ends of the support frame 151 are respectively penetrated with limiting pins 19 in the front-to-back direction, and the limiting pins 19 are inserted into the arc-shaped limiting groove 161 on the connecting rod 16 on the corresponding side. The above-mentioned connecting rod 16 rotates relative to the shaft section 17 to twist the torsion spring 18, and then the limit pin 19 can be inserted into the arc-shaped limit groove 161, so that the clamping roller 11 is subjected to the pressure of the torsion spring 18 in the initial state, and the clamping roller 11 is pre-tightened, so that the clamping roller 11 can generate a greater clamping force when it is subsequently pressed on the rubber belt 9.

[0063] like Figure 2-Figure 5As shown, there are two groups of power mechanisms, which are arranged on the first frame body 101 at intervals in front and back. The power mechanism includes a lifting drive 20, a bracket 21, a lateral drive 26, a moving plate 27 and a cutting drive 22.

[0064] like Figure 3 As shown, the lifting drive member 20 is installed on the first frame body 101. The lifting drive member 20 adopts a lifting cylinder. The bracket 21 is guided and slidably assembled on the first frame body 101 along the up and down directions. The lifting output end of the lifting drive member 20 is connected to the bracket 21 to drive the bracket 21 to move up and down.

[0065] like Figure 4 As shown, the transverse driving member 26 is installed on the bracket 21. The transverse driving member 26 adopts a linear cylinder that can be extended along the left and right directions. The moving plate 27 is guided and slidably assembled on the bracket 21 along the left and right directions. The driving output end of the transverse driving member 26 is connected to the moving plate 27 to drive the moving plate 27 to reciprocate left and right.

[0066] The cutting drive member 22 is installed on the movable plate 27. The cutting drive member 22 adopts a high-speed linear cylinder that can be extended in the left and right directions. The above-mentioned slide plate 152 is guided and slidably assembled on the movable plate 27 along the left and right directions. The driving output end of the cutting drive member 22 is connected to the tool holder 15 so that the cutting drive member 22 can drive the tool holder 15 to reciprocate in the left and right directions, thereby driving the cutting knife 12 to cut the film 25.

[0067] like Figure 2 As shown, the push roller 10 is installed on the first frame body 101 , and the push roller 10 extends in the front-to-back direction and is at the same height as the standby roller 2 .

[0068] There are two groups of push driving members 24, which are arranged on the first frame body 101 at intervals in front and back. The push driving members 24 are linear drive cylinders that can be telescopically moved in the left and right directions. Figure 5 As shown, the driving output ends of the two sets of pushing drive members 24 are connected to sliding blocks 23, and the sliding blocks 23 are guided and slidably assembled on the first frame body 101 along the left and right directions. The above-mentioned pushing roller 10 extends along the front and back directions and is rotatably connected between the two sliding blocks 23.

[0069] During the use of the present invention, the working roller 3 is initially in a winding state. When the film 25 on the working roller 3 is wound to a certain thickness, it is necessary to change the roll. At this time, the lifting drive member 20 and the lateral drive member 26 in the power mechanism drive the cutter assembly to move to a position close to the film 25. At this time, the state of the device is as follows: Figure 8Then, the push drive 24 drives the push roller 10 to move rightward, and the push roller 10 presses the film 25 against the standby roller 2. The cutting drive 22 drives the knife holder 15 to move rightward, driving the cutter 12 to move toward the film 25 between the standby roller 2 and the working traction roller group, and cuts the film 25. At this time, the state of the device is as shown in FIG. Fig. 9 After the cutting is completed, a material head 251 and a material tail 252 are formed at the cutting position of the film 25. At this time, the state of the device is as follows: Fig.10 As shown, the smoothing brush 13 moves to the right with the knife holder 15 to smooth the material head 251 formed by cutting and attach it to the standby roller 2. The material head 251 is tightly attached to the standby roller 2 under the action of electrostatic adsorption, and is wound on the standby roller 2 as the standby roller 2 rotates, thereby realizing roll change.

[0070] The tail 252 of the material is pressed by the pressure roller 11 on the rubber belt 9 on the inner traction roller 8 on the left side of the working traction roller group. The pressure roller 11 and the inner traction roller 8 squeeze the rubber belt 9, causing the rubber belt 9 to deform. When the adsorption groove 901 on the rotating rubber belt 9 passes through the pressure roller 11, the air inside is squeezed out, so that the inner cavity of the adsorption groove 901 forms a negative pressure, adsorbing the tail 252 on the rubber belt 9, and the working roller 3 continues to reel. The tail 252 of the material is adsorbed by the rubber belt 9 and moves toward the working roller 3, and finally reeled on the working roller 3. After that, the lifting drive 20 first drives the knife frame 15 to move upward, so that the smoothing brush 13 leaves the standby roller 2, and the transverse drive 26 and the cutting drive 22 then drive the knife frame 15 to move leftward, so that the cutting knife 12, the smoothing brush 13 and the pressure roller 11 are retracted and reset.

[0071] After the working roller 3 is wound, the working roller 3 together with the film 25 wound thereon is removed and replaced with a new working roller 3 without the film 25 wound thereon. Then the flip shaft 4 rotates 180 degrees clockwise, so that the standby roller 2 that is being wound is flipped from left to right to the position of the original working roller 3, and the empty working roller 3 is flipped to the position of the original standby roller 2. At the same time, the two traction roller groups are also flipped up and down by flipping. The standby traction roller group originally at the bottom rotates to the top and becomes the working traction roller group, and continues to receive and guide the film 25 wound on the working roller 3 at the upstream position, and continues to carry out the next round of winding.

[0072] The present invention is provided with a smoothing brush 13, a pressure roller 11 and a rubber belt 9 with an adsorption groove 901. The smoothing brush 13 brushes the material head 251 formed after cutting onto the standby roller 2 smoothly to prevent the material head 251 from generating wrinkles during winding. The pressure roller 11 squeezes the rubber belt 9 to cause the adsorption groove 901 to generate negative pressure to adsorb the material tail 252, so that the material tail 252 is fixed on the rubber belt 9, to prevent the material tail 252 from rebounding and deforming during the continued winding process to generate a large number of wrinkles, thereby effectively improving the quality of the wound product.

[0073] In this embodiment, the traction roller group includes two inner traction rollers 8 and two outer traction rollers 7, and the rubber belt 9 is sleeved on the outside of the two inner traction rollers 8 and the two outer traction rollers 7 to form a trapezoidal structure. In other embodiments, the traction roller group only includes two inner traction rollers 8. In this case, the rubber belt 9 is only sleeved on the outside of the two inner traction rollers 8.

[0074] In this embodiment, the pressure roller 11 is connected to the tool holder 15 through a connecting rod 16, and the connecting rod 16 is rotatably mounted on the shaft segment 17 on the tool holder 15, so that the connecting rod 16 can rotate and the pressure roller 11 can also rotate around the shaft segment 17. In other embodiments, the connecting rod 16 is fixed to the tool holder 15. At this time, the position of the pressure roller 11 on the tool holder 15 is fixed and cannot rotate around the shaft segment 17. At this time, when cutting the film 25, the axial height of the pressure roller 11 needs to be no lower than the axial height of the standby roller 2 to avoid interference between the pressure roller 11 and the standby roller 2 during the process of the lifting drive 20 driving the tool holder 15 to move upward and reset.

[0075] In this embodiment, an arc-shaped limit groove 161 is provided on the connecting rod 16, and a limit pin 19 is provided on the tool holder 15. In other embodiments, the arc-shaped limit groove 161 is not provided on the connecting rod 16, and the limit pin 19 is not provided on the tool holder 15. At this time, a torsion spring 18 with a large torsional stiffness can be used to enable the clamping roller 11 to generate a sufficiently large clamping force when pressing on the rubber belt 9.

Claims

1. A winding device for a coating machine, comprising a winding assembly and a cutting knife assembly, the winding assembly comprising a turning frame extending forward and backward of a rotating axis and two rollers symmetrically arranged on the turning frame, and two groups of traction roller groups symmetrically arranged up and down, the positions of the two rollers can be swapped with the rotation of the turning frame to form: a standby roller and a working roller arranged on the left and right, the two traction roller groups can be swapped with the rotation of the turning frame to form: a working traction roller group and a standby traction roller group arranged up and down, the working roller is used for winding the film, the working traction roller group is used for guiding the film to the working roller, and the standby roller is used for the material head formed when the wound film is cut; the cutting knife assembly comprises a knife frame and a cutting knife installed on the knife frame, the knife frame is movably installed on the frame, and the cutting knife is used for moving rightward with the knife frame to cut the film between the working traction roller group and the standby roller; It is characterized in that The traction roller group includes two inner traction rollers distributed on the left and right, a rubber belt sleeved on the inner traction rollers, and a belt driving mechanism for driving the inner traction rollers to rotate. The outer surface of the rubber belt is provided with a plurality of adsorption grooves arranged in an array, and the adsorption grooves are used to form negative pressure when squeezed to absorb the film tightly. The cutter assembly also includes a pressure roller installed on the cutter frame and extending forward and backward; the pressure roller is located on the upper side of the cutter and is opposite to the roller surface of the inner traction roller of the working traction roller group on the left side, so that when the pressure roller moves to the right with the cutter frame, it can squeeze the rubber belt with the inner traction roller, thereby deforming the adsorption groove on the rubber belt to absorb the tail of the film in contact with the inner traction roller; The cutting knife assembly also includes a smoothing brush installed on the knife holder, the right end of the smoothing brush lags behind the blade of the cutting knife in the left-right direction, and the smoothing brush is located at the lower side of the cutting knife; the knife holder is movably installed on the frame in the left-right direction and the up-down direction at the same time, and the smoothing brush moves downward with the knife holder before moving rightward with the knife holder so that the lower end of the smoothing brush is lower than the upper end of the outer peripheral surface of the standby roller, and the smoothing brush is used to press the material head dropped on the standby roller when moving rightward with the knife holder; The tool holder is provided with two shaft sections arranged at intervals in front and back, each of the two shaft sections is rotatably sleeved with a connecting rod, and the clamping roller is rotatably connected between one end of the two connecting rods facing away from the shaft end; a torsion spring is connected between the connecting rod and the corresponding shaft section, and the torsion spring is used to elastically press the clamping roller on the inner traction roller located on the left side of the working traction roller group; A limit pin parallel to the shaft segment is provided on the tool holder, and an arc-shaped limit groove coaxial with the shaft segment is provided at one end of the connecting rod for being mounted on the shaft segment. The arc-shaped limit groove is located on the upper side of the shaft segment. After the connecting rod rotates to the left to cause the torsion spring to produce a set torsion amount, the limit pin can be inserted into the left side of the arc-shaped limit groove to pre-tighten the connecting rod and the clamping roller.

2. A winding device for a coating machine according to claim 1, characterized in that: The traction roller group also includes two outer traction rollers arranged at intervals on the left and right, the spacing between the two outer traction rollers is smaller than the spacing between the two inner traction rollers, the two outer traction rollers are located on the side of the two inner traction rollers facing away from the roller cylinder and are correspondingly arranged between the two inner traction rollers in the up and down directions, and the rubber belt is sleeved on the outside of the two outer traction rollers and the two inner traction rollers.

3. A winding device for a coating machine according to claim 1 or 2, characterized in that: A push roller having the same height as the standby roller is provided below the cutter assembly. The push roller is movably mounted on the frame along the left and right directions. The push roller is used to press the film to be cut against the standby roller when moving to the right.

4. A winding device for a coating machine according to claim 1 or 2, characterized in that: The turning frame includes a turning shaft extending forward and backward, two transverse support plates, two first vertical support plates and two second vertical support plates; the two transverse support plates are connected to the turning shaft and are arranged with intervals in front and back, and the two rollers are installed between the two transverse support plates and are respectively arranged on the left and right sides of the turning shaft; the two first vertical support plates are connected to the upper half of the turning shaft and are arranged with intervals in front and back, and the two first vertical support plates are located between the two transverse support plates; the two second vertical support plates are symmetrically connected to the two first vertical support plates on the lower half of the turning shaft, and a group of traction roller groups are respectively installed between the two first vertical support plates and between the two second vertical support plates.

5. A winding device for a coating machine according to claim 1 or 2, characterized in that: A power mechanism is provided on the left side of the cutting knife assembly, and the power mechanism includes a lifting drive member and a transverse driving member. The lifting output end of the lifting drive member is connected to a bracket, and the transverse driving member is installed on the bracket. The transverse driving member has a driving output end that can reciprocate left and right. The driving output end of the transverse driving member is connected to a movable plate, and a cutting drive member is installed on the movable plate. The cutting drive member has a driving output end that can reciprocate left and right, and the knife holder is connected to the driving output end of the cutting drive member.

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