Roll changing method, roll changing device and makeup cotton production line

Abstract

The invention discloses a roll changing method, a roll changing device and a cotton pad production line. In the roll changing method, cotton pad is put on a first winding drum, then the movable end of the cotton pad is driven to move along the drum face of the first winding drum so that the movable end can be wound around the drum face of the first winding drum, and then the first winding drum is driven to rotate so that the cotton pad can be wound around the first winding drum. The to-be-wound part of the cotton pad roll is wound on the first winding drum, and the to-be-wound part of the cotton pad is pressed against the movable end. When the first winding drum rotates, the to-be-wound part of the cotton pad can tightly press the movable end, so that the cotton pad can be smoothly wound on the first winding drum in the rotating process of the first winding drum.

Description

Technical Field

[0001] The present invention relates to the technical field of cotton pad manufacturing, and particularly to a rewinding method, a rewinding device and a cotton pad production line. Background Art

[0002] In the manufacturing process of cotton pads, it is necessary to wind the cotton pads onto a reel. When the reel winds the cotton pads, the reel needs to rotate so that the cotton pads can be smoothly wound onto the reel.

[0003] After a reel is fully wound with cotton pads, it is necessary to replace it with another empty reel. After replacing the empty reel, since the movable end of the cotton pad will sag under the action of gravity, there will be a gap between the movable end of the cotton pad and the surface of the empty reel. When the empty reel rotates, it is difficult for the cotton pads to be smoothly wound onto the empty reel. Summary of the Invention

[0004] An object of the present invention is to solve at least one of the technical problems existing in the prior art. A rewinding method provided in the first aspect of the present invention enables the cotton pads to be smoothly wound onto an empty reel after replacing the empty reel using the rewinding method of this embodiment. The second aspect of the present invention provides a rewinding device. The third aspect of the present invention provides a cotton pad production line.

[0005] According to the rewinding method provided in the first aspect embodiment of the present invention, it includes the following steps:

[0006] Lay the cotton pads on the first reel;

[0007] Drive the movable end of the cotton pads to move along the surface of the first reel so that the movable end is wound around the surface of the first reel;

[0008] Drive the first reel to rotate so that the part of the cotton pads to be wound is wound onto the first reel and the part of the cotton pads to be wound presses against the movable end.

[0009] The rewinding device of the present invention has at least the following beneficial effects: In the rewinding method of this application, first, the cotton pads are laid on the first reel. Then, the movable end of the cotton pads is driven to move along the surface of the first reel so that the movable end is wound around the surface of the first reel. Then, the first reel is driven to rotate so that the part of the cotton pads to be wound is wound onto the first reel and the part of the cotton pads to be wound presses against the movable end. Since the part of the cotton pads to be wound can press against the movable end when the first reel rotates, the cotton pads can be smoothly wound onto the first reel during the rotation of the first reel.

[0010] According to the rewinding method described in the first aspect embodiment of the present invention, before driving the first reel to rotate, it further includes the following steps:

[0011] The portion of the cosmetic cotton to be wound is driven to fit into the surface of the first reel, so that the portion of the cosmetic cotton to be wound presses the movable end thereof tightly against the surface of the first reel.

[0012] According to the roll-changing method of the embodiment of the first aspect of the present invention, placing the cosmetic cotton on the first roll includes the following steps:

[0013] Driving the second reel wound with the cosmetic cotton in the winding area to leave the winding area;

[0014] Place the first reel in the winding area, with the portion of the cotton pad to be wound located on the upper side of the first reel;

[0015] The cosmetic cotton between the first reel and the second reel is cut so that the cosmetic cotton is placed on the first reel under the action of gravity.

[0016] The roll changing device provided in accordance with the embodiment of the second aspect of the present invention includes a frame, a driving module, a feeding module and a material organizing module; the frame has a winding area for accommodating a roll; the feeding module is arranged on the frame, and the feeding module is used to place the cosmetic cotton on the roll in the winding area; the material organizing module is arranged on the frame, and includes a first driving structure and a paddle connected thereto, the first driving structure is used to drive the paddle to move along the drum surface of the roll in the winding area, so that the paddle can drive the movable end of the cosmetic cotton to move along the drum surface, so that the movable end is wound on the drum surface of the roll; the driving module is used to drive the roll in the winding area to rotate, so that the part of the cosmetic cotton to be wound is wound on the roll, and the part of the cosmetic cotton to be wound is pressed against the movable end.

[0017] According to the roll-changing device described in the embodiment of the second aspect of the present invention, it also includes a pressing roll module, which includes a second drive structure and a pressing roll roller connected to each other. The second drive structure is used to drive the pressing roll roller to make the part of the cosmetic cotton to be wound fit the drum surface of the reel in the winding area, so that the part of the cosmetic cotton to be wound can press the movable end tightly against the drum surface of the reel.

[0018] According to the roll changing device described in the embodiment of the second aspect of the present invention, it also includes a feeding module, the unloading module includes a lower roll component and a cutting component, the lower roll component includes a third driving structure and a first clamping structure connected to each other. Under the drive of the third driving structure, the first clamping structure can clamp the roll with the cosmetic cotton wound in the winding area, the feeding module can place the empty roll in the winding area, and make the empty roll located at the lower side of the part of the cosmetic cotton to be wound, and the cutting component can cut the cosmetic cotton so that the cosmetic cotton is placed on the empty roll under the action of gravity.

[0019] According to the rewinding device described in the second aspect of the present invention, the loading module includes a second clamping structure, a fourth driving structure, and a conveying track. The conveying track is used to convey an empty reel, the second clamping structure is used to clamp the reel, and the fourth driving structure is connected to the second clamping structure and is used to drive the second clamping structure to move between the tail end of the conveying track and the winding area.

[0020] According to the rewinding device described in the second aspect of the present invention, the driving module includes a third clamping structure, a fifth driving structure, and a sixth driving structure. There are two third clamping structures arranged horizontally. The third clamping structure includes a mounting seat and a rotating shaft. The rotating shaft is rotatably arranged on the mounting seat, and the winding area is located between the two rotating shafts. The fifth driving structure is connected to at least one mounting seat and is used to drive the two mounting seats to approach or move away from each other, so that the two rotating shafts cooperate to clamp or loosen the reel in the winding area. The sixth driving structure is connected to at least one rotating shaft and is used to drive the rotating shaft to rotate.

[0021] According to the rewinding device described in the second aspect of the present invention, the first driving structure includes a first driver and a second driver connected to each other. The first driver is used to drive the dial to move horizontally, and the second driver is used to drive the dial to move along the conveying direction.

[0022] According to the cotton pad production line provided by the third aspect of the present invention, it includes the rewinding device provided by the second aspect of the present invention.

[0023] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the drawings and embodiments;

[0025] Figure 1 It is a flowchart of a rewinding method according to an embodiment of the present invention;

[0026] Figure 2 It is a flowchart of laying a cotton pad on a first reel according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the process of winding a cotton pad around a first reel according to an embodiment of the present invention;

[0028] Figure 4 It is a schematic structural diagram of a rewinding device according to an embodiment of the present invention;

[0029] Figure 5 is Figure 4 a schematic structural diagram of the driving module of the shown rewinding device;

[0030] Figure 6 is Figure 4 the structural schematic diagram of the coil pressing module of the coil changing device shown in Figure 6 ;

[0031] Figure 7 is Figure 4 the structural schematic diagram of the material arranging module and the feeding module of the coil changing device shown in Figure 4 .

[0032] Reference numerals:

[0033] the first reel 10; the second reel 20; the cotton pads 30;

[0034] the frame 100; the winding area 101;

[0035] the driving module 200; the third clamping structure 210; the mounting seat 211; the rotating shaft 212; the fifth driving structure 220; the sixth driving structure 230;

[0036] the blanking module 300; the uncoiling assembly 310; the third driving structure 311; the first clamping structure 312; the cutting assembly 320;

[0037] the material arranging module 400; the first driving structure 410; the first driver 411; the second driver 412; the paddle 420;

[0038] the coil pressing module 500; the second driving structure 510; the third driver 511; the mounting frame 512; the movable frame 513; the coil pressing roller 520;

[0039] the feeding module 600; the second clamping structure 610; the fourth driving structure 620; the fourth driver 621; the sliding seat 622; the fifth driver 623; the conveying track 630; the blocking structure 640. Detailed implementation manners

[0040] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention.

[0042] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, while understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0044] The following refers to Figures 1 to 3 to describe in detail the winding method of the first aspect of the present invention.

[0045] Refer to Figure 1 , according to the winding method of the embodiment of the first aspect of the present invention, it includes but is not limited to the following steps:

[0046] Step S100: Place the cotton pad 30 on the first reel 10;

[0047] Step S200: Drive the movable end of the cotton pad 30 to move along the cylindrical surface of the first reel 10 so that the movable end is wound around the cylindrical surface of the first reel 10;

[0048] Step S400: Drive the first reel 10 to rotate so that the part of the cotton pad 30 to be wound is wound on the first reel 10 and the part of the cotton pad 30 to be wound presses against the movable end.

[0049] Refer to Figure 3 , it can be understood that after the cotton pad 30 is placed on the first reel 10, the movable end of the cotton pad 30 will droop under the action of gravity. At this time, it is difficult for the movable end of the cotton pad 30 to completely fit the cylindrical surface of the first reel 10; when driving the movable end of the cotton pad 30 to move along the cylindrical surface of the first reel 10, the movable end of the cotton pad 30 can be wound around the cylindrical surface of the first reel 10. At this time, the movable end of the cotton pad 30 is still not completely fixed on the cylindrical surface of the first reel 10. Then, driving the first reel 10 to rotate can make the part of the cotton pad 30 to be wound be wound on the first reel 10 and make the part of the cotton pad 30 to be wound press against the movable end. At this time, the movable end of the cotton pad 30 can be fixed on the cylindrical surface of the first reel 10. During the subsequent rotation of the first reel 10, the cotton pad 30 can be smoothly wound on the first reel 10, and the probability of slipping between the cotton pad 30 and the first reel 10 can be reduced.

[0050] In some embodiments of the present invention, refer to Figure 1Before step S400, the following steps are also included but not limited to:

[0051] Step S300 , driving the portion of the cosmetic cotton 30 to be wound to fit the surface of the first reel 10 , so that the portion of the cosmetic cotton 30 to be wound presses the movable end thereof tightly against the surface of the first reel 10 .

[0052] refer to Figure 3 It can be understood that by driving the part of the cosmetic cotton 30 to be wound to fit the drum surface of the first reel 10, the part of the cosmetic cotton 30 to be wound can initially press the movable end against the drum surface of the first reel 10, so as to achieve the preliminary fixation of the movable end of the cosmetic cotton 30. In the subsequent rotation of the first reel 10, the part of the cosmetic cotton 30 to be wound can be gradually wound on the first reel 10, so as to completely press the movable end of the cosmetic cotton 30 against the drum surface of the first reel 10.

[0053] In some embodiments of the present invention, reference Figure 2 In step S100, the following steps are also included but not limited to:

[0054] Step S110, driving the second reel 20 wound with the cosmetic cotton 30 in the winding area 101 to leave the winding area 101;

[0055] Step S120: placing the first reel 10 in the winding area 101, with the portion of the cosmetic cotton 30 to be wound located on the upper side of the first reel 10;

[0056] Step S130 , cutting the cosmetic cotton 30 between the first reel 10 and the second reel 20 so that the cosmetic cotton 30 is placed on the first reel 10 under the action of gravity.

[0057] refer to Figure 3 It can be understood that by first driving the second reel 20 with the cosmetic cotton 30 wound in the winding area 101 to detach from the winding area 101, then placing the first reel 10 in the winding area 101, and making the part of the cosmetic cotton 30 to be wound be located on the upper side of the first reel 10, and then cutting off the cosmetic cotton 30 between the first reel 10 and the second reel 20, at this time, the cosmetic cotton 30 can automatically be placed on the first reel 10 under the action of gravity.

[0058] Reference below Figures 4 to 7 The roll changing device of the second embodiment of the present invention is described in detail.

[0059] refer to Figure 4 and Figure 7, The rewinding device according to the second aspect embodiment of the present invention includes a frame 100, a driving module 200, a blanking module 300, and a material arranging module 400; the frame 100 has a winding area 101 for accommodating a reel; the blanking module 300 is arranged on the frame 100, and the blanking module 300 is used to place the cotton pads 30 on the reel in the winding area 101; the material arranging module 400 is arranged on the frame 100 and includes a connected first driving structure 410 and a paddle 420, the first driving structure 410 is used to drive the paddle 420 to move along the surface of the reel in the winding area 101, so that the paddle 420 can drive the movable end of the cotton pad 30 to move along the surface of the reel, so that the movable end is wound around the surface of the reel; the driving module 200 is used to drive the reel in the winding area 101 to rotate, so that the part of the cotton pad 30 to be wound is wound on the reel, and the part of the cotton pad 30 to be wound presses the movable end.

[0060] It can be understood that when the rewinding device of the present invention is working, the reel is placed in the winding area 101, the blanking module 300 can first place the cotton pads 30 on the reel in the winding area 101, and then, the first driving structure 410 can drive the paddle 420 to move along the surface of the reel in the winding area 101, so that the paddle 420 can drive the movable end of the cotton pad 30 to move along the surface of the reel, so that the movable end of the cotton pad 30 is wound around the surface of the reel, and then, the driving module 200 can drive the reel in the winding area 101 to rotate, so that the part of the cotton pad 30 to be wound is wound on the reel, and the part of the cotton pad 30 to be wound presses the movable end.

[0061] In some embodiments of the present invention, the first driving structure 410 includes a connected first driver 411 and a second driver 412, the first driver 411 is used to drive the paddle 420 to move in the horizontal direction, and the second driver 412 is used to drive the paddle 420 to move in the conveying direction.

[0062] For example, as Figure 7 shown, the first driving structure 410 includes a first driver 411 and a second driver 412, the output end of the first driver 411 is connected to the second driver 412 and is used to drive the second driver 412 to move in the front-back direction, and the second driver 412 is connected to the paddle 420 and is used to drive the paddle 420 to move in the vertical direction.

[0063] It can be understood that referring to Figure 7, when the blanking module 400 is working, the first driver 411 can drive the paddle 420 to move backward so that the paddle 420 moves to the rear side of the movable end. Then, the first driver 411 drives the paddle 420 to move forward so that the paddle 420 drives the movable end to bend forward, thereby enabling the movable end to wrap the lower end of the reel. After that, the second driver 412 drives the paddle 420 to move upward so that the paddle 420 pushes up the movable end to enable the movable end to wrap the front end of the reel, thus completing the wrapping of the movable end around the reel.

[0064] In some embodiments of the present invention, referring to Figure 4 and Figure 6 , the rewinding device further includes a pressing module 500. The pressing module 500 includes a second driving structure 510 and a pressing roller 520 connected to each other. The second driving structure 510 is used to drive the pressing roller 520 to press the portion of the cotton pad 30 to be wound against the cylindrical surface of the reel in the winding area 101, so that the portion of the cotton pad 30 to be wound can press the movable end against the cylindrical surface of the reel.

[0065] It should be noted that after the paddle 420 of the blanking module 400 drives the movable end of the cotton pad 30 to wrap the reel, in this case, the portion of the cotton pad 30 to be wound does not press the movable end of the cotton pad 30 against the reel. If the reel rotates directly, the movable end of the cotton pad 30 may come off the reel.

[0066] It can be understood that by providing the pressing module 500, after the blanking module 400 drives the movable end of the cotton pad 30 to wrap the cylindrical surface of the reel, the pressing module 500 can drive the portion of the cotton pad 30 to be wound to completely press the movable end of the cotton pad 30 against the cylindrical surface of the reel, thereby reducing the possibility of the movable end of the cotton pad 30 coming off the reel.

[0067] In a further embodiment of the present invention, referring to Figure 6 , the second driving structure 510 includes a third driver 511, a mounting frame 512, and a movable frame 513. The pressing roller 520 is rotatably provided on the movable frame 513. The movable frame 513 is swingably provided on the mounting frame 512 about the left-right axis. The third driver 511 is provided on the mounting frame 512 and is connected to the movable frame 513.

[0068] Furthermore, under the drive of the third driver 511, the movable frame 513 can drive the pressing roller 520 to swing about the left-right axis, so that the pressing roller 520 swings backward to approach the reel in the winding area 101, or the pressing roller 520 swings forward to move away from the reel in the winding area 101.

[0069] In some embodiments of the present invention, the roll changing device further includes a loading module 600. The unloading module 300 includes a lower roll component 310 and a cutting component 320. The lower roll component 310 includes a third driving structure 311 and a first clamping structure 312 which are connected to each other. Driven by the third driving structure 311, the first clamping structure 312 can clamp the reel wound with cotton pads 30 in the winding area 101. The loading module 600 can place an empty reel into the winding area 101 and make the empty reel located below the part of the cotton pads 30 to be wound. The cutting component 320 can cut the cotton pads 30 so that the cotton pads 30 are placed on the empty reel under the action of gravity.

[0070] For example, as Figure 4 shown, the roll changing device further includes a loading module 600. The unloading module 300 includes a lower roll component 310 and a cutting component 320. The cutting component 320 is located at the rear side of the winding area 101. The lower roll component 310 includes a third driving structure 311 and a first clamping structure 312 which are connected to each other.

[0071] Furthermore, when the roll changing device is working, the third driving structure 311 drives the first clamping structure 312 to move forward into the winding area 101. The first clamping structure 312 clamps the reel wound with cotton pads 30 in the winding area 101. Then, the third driving structure 311 drives the first clamping structure 312 to drive the reel wound with cotton pads 30 to move backward until the first clamping structure 312 moves to the rear side of the cutting component 320. Then, the loading module 600 feeds an empty reel into the winding area 101. At this time, the empty reel is located below the part of the cotton pads 30 to be wound. The cutting component 320 cuts the cotton pads 30. Under the action of gravity, the cotton pads 30 to be wound are placed on the empty reel.

[0072] In some embodiments of the present invention, the loading module 600 includes a second clamping structure 610, a fourth driving structure 620 and a conveying track 630. The conveying track 630 is used for conveying an empty reel. The second clamping structure 610 is used for clamping the reel. The fourth driving structure 620 is connected to the second clamping structure 610 and is used for driving the second clamping structure 610 to move between the tail end of the conveying track 630 and the winding area 101.

[0073] For example, as Figure 7As shown, the fourth driving structure 620 includes a fourth driver 621, a sliding seat 622, and a fifth driver 623. The sliding seat 622 is slidably disposed on the frame 100 in the left-right direction. The fourth driver 621 is connected to the sliding seat 622 and is used to drive the sliding seat 622 to slide left and right relative to the frame 100. The fifth driver 623 is disposed on the sliding seat 622 and is connected to the second clamping structure 610. The fifth driver 623 is used to drive the second clamping structure 610 to perform a lifting motion. The conveying track 630 is disposed on the right side of the winding area 101.

[0074] When the loading module 600 is working, driven by the fourth driver 621, the sliding seat 622 drives the second clamping structure 610 to move to the right so that the second clamping structure 610 moves to directly below the end of the conveying track 630. Then, driven by the fifth driver 623, the second clamping structure 610 moves upward close to the end of the conveying track 630. The conveying track 630 conveys an empty reel to the second clamping structure 610 so that the second clamping structure 610 can successfully clamp the empty reel. Then, the fifth driver 623 drives the second clamping structure 610 to move downward, and the fourth driver 621 drives the sliding seat 622 to move to the left so that the second clamping structure 610 moves to directly below the winding area 101. Then, the fifth driver 623 drives the second clamping structure 610 to move upward so that the second clamping structure 610 sends the clamped reel into the winding area 101.

[0075] In a further embodiment of the present invention, referring to Figure 7 , the loading module 600 further includes a blocking structure 640. The blocking structure 640 includes a sixth driver and a blocking member. The sixth driver is connected to the blocking member and is used to drive the blocking member to extend into or out of the end of the conveying track 630 so that the blocking member closes or opens the end of the conveying track 630.

[0076] It can be understood that when the conveying track 630 needs to convey the reel into the second clamping structure 610, the sixth driver can drive the blocking member to extend out of the end of the conveying track 630. At this time, the reel in the conveying track 630 can be successfully conveyed into the second clamping structure 610. Then, the sixth driver can drive the blocking member to extend into the end of the conveying track 630 to prevent the conveying track 630 from continuing to output the reel.

[0077] In some embodiments of the present invention, referring to Figure 5, the driving module 200 includes a third clamping structure 210, a fifth driving structure 220 and a sixth driving structure 230. There are two third clamping structures 210 arranged horizontally. The third clamping structure 210 includes a mounting seat 211 and a rotating shaft 212. The rotating shaft 212 is rotatably arranged on the mounting seat 211. The winding area 101 is located between the two rotating shafts 212. The fifth driving structure 220 is connected to at least one mounting seat 211 and is used to drive the two mounting seats 211 to approach or separate from each other, so that the two rotating shafts 212 cooperate to clamp or loosen the reel in the winding area 101. The sixth driving structure 230 is connected to at least one rotating shaft 212 and is used to drive the rotating shaft 212 to rotate.

[0078] Furthermore, when replacing the reel in the winding area 101, the fifth driving structure 220 can drive the two mounting seats 211 to separate from each other, so that the two rotating shafts 212 separate from each other. At this time, the blanking module 300 can smoothly blank the reel wound with the cotton pads 30 in the winding area 101. Then, the loading module 600 can load the empty reel into the winding area 101. Next, the fifth driving structure 220 drives the two mounting seats 211 to approach each other, so that the two rotating shafts 212 approach each other to clamp the left and right ends of the empty reel. When the cotton pads 30 need to be wound on the reel, the sixth driving structure 230 drives the rotating shaft 212 to rotate, so that the rotating shaft 212 drives the reel in the winding area 101 to rotate, so that the winding of the cotton pads 30 can be carried out smoothly.

[0079] Specifically, the fifth driving structure 220 includes two air cylinders. The two air cylinders are respectively connected to the two mounting seats 211, and the two air cylinders can synchronously drive the two mounting seats 211 to approach or separate from each other.

[0080] According to the cotton pad 30 production line provided by the third aspect embodiment of the present invention, it includes the reel changing device provided by the second aspect embodiment of the present invention.

[0081] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A roll-changing method, characterized in that, The following steps are included: Place the cotton pad on the first roll; driving the movable end of the cosmetic cotton pad to move along the surface of the first drum so that the movable end is wound around the surface of the first drum; The first reel is driven to rotate so that the portion of the cosmetic cotton to be wound is wound on the first reel, and the portion of the cosmetic cotton to be wound is pressed against the movable end.

2. The rewinding method according to claim 1, wherein Before driving the first reel to rotate, the following steps are also included: The portion of the cosmetic cotton to be wound is driven to fit into the surface of the first reel, so that the portion of the cosmetic cotton to be wound presses the movable end tightly against the surface of the first reel.

3. The rewinding method according to claim 1, wherein The step of placing the cosmetic cotton pad on the first reel comprises the following steps: driving the second reel wound with the cosmetic cotton in the winding area to separate from the winding area; Placing the first roller in the winding area, with the portion of the cosmetic cotton to be wound located on the upper side of the first roller; The cosmetic cotton between the first reel and the second reel is cut so that the cosmetic cotton is placed on the first reel under the action of gravity.

4. A roll changing device, characterized in that, include: a frame having a winding area for receiving the roll; A blanking module is provided on the frame, and is used to place the cosmetic cotton on the reel in the winding area; a material-forming module, disposed on the frame, and comprising a first driving structure and a paddle connected thereto, wherein the first driving structure is used to drive the paddle to move along the surface of the reel in the winding area, so that the paddle can drive the movable end of the cosmetic cotton to move along the surface of the reel, so that the movable end is wound around the surface of the reel; The driving module is used to drive the reel in the winding area to rotate so that the part of the cosmetic cotton to be wound is wound on the reel and the part of the cosmetic cotton to be wound is pressed against the movable end.

5. The rewinding device according to claim 4, characterized in that, It also includes a rolling module. The pressing and rolling module includes a second driving structure and a pressing and rolling roller connected to each other, and the second driving structure is used to drive the pressing and rolling roller to make the part of the cosmetic cotton to be wound fit against the cylinder surface of the reel in the winding area, so that the part of the cosmetic cotton to be wound can press the movable end tightly against the cylinder surface of the reel.

6. The rewinding device according to claim 4, wherein It also includes a loading module, The unloading module includes a lower winding component and a cutting component. The lower winding component includes a third driving structure and a first clamping structure connected to each other. Under the drive of the third driving structure, the first clamping structure can clamp the roll with the cosmetic cotton wound in the winding area. The loading module can place the empty roll in the winding area and make the empty roll located at the lower side of the part of the cosmetic cotton to be wound. The cutting component can cut the cosmetic cotton so that the cosmetic cotton is placed on the empty roll under the action of gravity.

7. The rewinding device according to claim 6, wherein, The loading module includes a second clamping structure, a fourth drive structure and a conveying track. The conveying track is used to transport unloaded rolls. The second clamping structure is used to clamp the rolls. The fourth drive structure is connected to the second clamping structure and is used to drive the second clamping structure to move between the tail end of the conveying track and the winding area.

8. The rewinding device according to claim 4, characterized in that, The driving module includes a third clamping structure, a fifth driving structure and a sixth driving structure. There are two third clamping structures arranged horizontally. The third clamping structure includes a mounting seat and a rotating shaft. The rotating shaft is rotatably arranged on the mounting seat. The winding area is located between the two rotating shafts. The fifth driving structure is connected to at least one of the mounting seats and is used to drive the two mounting seats to approach or move away from each other, so that the two rotating shafts cooperate to clamp or loosen the reel in the winding area. The sixth driving structure is connected to at least one of the rotating shafts and is used to drive the rotating shaft to rotate.

9. The rewinding device according to claim 4, wherein, The first driving structure includes a first driver and a second driver connected to each other. The first driver is used to drive the paddle to move in the horizontal direction, and the second driver is used to drive the paddle to move in the conveying direction.

10. A cotton pad production line, characterized in that, It includes the rewinding device according to any one of claims 4 to 9.

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