Multifunctional rewinding device with two optional cores

Abstract

The utility model relates to the technical field of rewinding machines, in particular to a multifunctional rewinding device with selectable double cores, which comprises a base, a left support and a right support are fixedly arranged on the base, a rewinding fixed roller is rotatably arranged on the left support, a core tube frame is arranged below the rewinding fixed roller, the top of the core tube frame is an arc-shaped surface, and the top of the core tube frame is provided with an arc-shaped groove. A group of switching arms are rotationally arranged on the right support, a rewinding movable roller is rotationally arranged between the switching arms, a rewinding roller gap is formed between the rewinding movable roller and the rewinding fixed roller, and a switching assembly is arranged between the switching arms and the right support and used for adjusting the position relation between the rewinding movable roller and the rewinding fixed roller. The method has the effects of simplifying the working mode switching process of the rewinding machine and shortening the working mode switching time of the rewinding machine.

Description

TECHNICAL FIELD

[0001] The utility model relates to rewinding machine technical field especially is related to a double -core optional multifunctional rewinding device. BACKGROUND

[0002] The rewinding machine is a kind of equipment for winding paper, film or other strip into a specific size reel, and the rewinding machine is currently divided into two working modes, one is the core mode that strip is wound on core pipe to form reel, and the other is the coreless mode that strip is wound into coreless pipe reel.

[0003] The rewinding machine for switching core and coreless working mode conveniently provided in the related art with the authorization announcement No.CN216129085U of Chinese patent, it includes rewinding upper roller and rewinding lower roller, and the conveying mechanism is arranged between rewinding upper roller and rewinding lower roller, and the mobile mechanism is installed on conveying mechanism, and mobile mechanism is used to drive conveying mechanism to approach or be far from the nip between rewinding upper roller and rewinding lower roller.When the working mode of rewinding machine is core mode, mobile mechanism drives conveying mechanism to approach the nip between rewinding upper roller and rewinding lower roller, so that conveying mechanism sends core pipe into the nip;When the working mode of rewinding machine is coreless mode, mobile mechanism drives conveying mechanism to be far from the nip between rewinding upper roller and rewinding lower roller, and then rewinding upper roller and rewinding lower roller approach.

[0004] In the implementation of the present application, the inventors found that at least the following problems exist in the prior art: when the coreless mode is switched to the core mode, the nip between the rewinding upper roller and the rewinding lower roller needs to be adjusted first, and then the mobile mechanism is used to adjust the conveying mechanism to be close to the nip between the rewinding upper roller and the rewinding lower roller, and when the core mode is switched to the coreless mode, the mobile mechanism is used to adjust the conveying mechanism to be far from the nip between the rewinding upper roller and the rewinding lower roller first, and then the nip between the rewinding upper roller and the rewinding lower roller is adjusted to be small, resulting in long switching time of the core mode and the coreless mode of the rewinding machine, and the mode switching steps of the rewinding machine are complicated. UTILITY MODEL CONTENTS

[0005] In order to simplify the switching process of the working mode of the rewinding machine and shorten the switching time of the working mode of the rewinding machine, the present application provides a double-core selectable multifunctional rewinding device.

[0006] The double-core selectable multifunctional rewinding device provided by the present application adopts the following technical scheme:

[0007] The utility model provides a double -core optional multifunctional rewinding device, including frame, left support and right support are fixedly arranged on the frame, rewinding fixed roller is rotatably arranged on the left support, the core pipe frame is arranged below the rewinding fixed roller, the top of core pipe frame is arc surface, a group of switching arms are rotatably arranged on the right support, rewinding movable roller is rotatably arranged between the switching arms, and the rewinding movable roller and rewinding fixed roller form rewinding roller gap, and switching assembly is arranged between the switching arm and right support, and the switching assembly is used for adjusting the positional relationship of rewinding movable roller and rewinding fixed roller.

[0008] When the working mode of the rewinder is the core mode, the switching assembly drives the switching arm to rotate, and the rewinding movable roller moves to the oblique lower side of the rewinding fixed roller, at this time, the rewinding fixed roller is the upper rewinding roller, the rewinding movable roller is the lower rewinding roller, and the core pipe is placed in the rewinding roller gap between the rewinding fixed roller and the rewinding movable roller through the core pipe frame.

[0009] Preferably, a transmission motor is fixedly arranged on the frame, a transmission roller is fixedly arranged on the output shaft of the transmission motor, a plurality of supporting rollers are rotatably arranged on the frame, the transmission roller and the supporting roller are parallel to each other, and a conveying belt is arranged on the side, away from the right support, of the core pipe frame.

[0010] When the transmission motor is started, the transmission motor drives the transmission roller to rotate, the transmission roller drives the conveying belt to move, and the conveying belt moves the core pipe to the core pipe frame.

[0011] Preferably, a core support is fixedly arranged on the left support, a core pressing groove is formed in the core support, a core pressing block is slidably arranged in the core pressing groove, a core spring is arranged between the core pressing groove and the core pressing block, a core pressing roller is rotatably arranged on the core pressing block, the core pressing roller is located on the side, away from the conveying belt, of the rewinding fixed roller, and the core pressing roller, the rewinding fixed roller and the rewinding movable roller are parallel to each other.

[0012] When the working mode of the rewinder is the core mode, the rewinding movable roller is located on the oblique lower side of the rewinding fixed roller, the rewinding roller gap formed between the rewinding movable roller and the rewinding fixed roller is located on the side of the core pressing roller, and the core pressing roller is pressed on the core reel under the action of the core spring in the process of forming the core reel in the rewinding roller gap, so that the core reel is limited between the rewinding movable roller, the rewinding fixed roller and the core pressing roller.

[0013] Preferably, a coreless support is fixedly arranged between the switching arms, a coreless pressing groove is formed in the coreless support, a coreless pressing block is slidably arranged in the coreless pressing groove, a coreless spring is arranged between the coreless pressing groove and the coreless pressing block, a coreless pressing roller is rotatably arranged on the coreless pressing block, the coreless pressing roller is located on the side of the rewinding fixed roller away from the conveying belt, and the coreless pressing roller, the rewinding fixed roller and the rewinding movable roller are arranged in parallel.

[0014] When the rewinding machine is in the coreless mode, the rewinding movable roller is located obliquely above the rewinding fixed roller, a rewinding roller gap formed between the rewinding movable roller and the rewinding fixed roller is located on the side of the coreless pressing roller, and the coreless pressing roller is pressed against the coreless winding drum under the action of the coreless spring during the formation of the coreless winding drum in the rewinding roller gap.

[0015] Preferably, the rewinding fixed roller comprises a rewinding fixed cylinder and a rewinding fixed shell, the rewinding fixed cylinder is fixedly arranged on the left support, the rewinding fixed shell is sleeved on the rewinding fixed cylinder, the inner wall of the rewinding fixed shell is attached to the outer wall of the rewinding fixed cylinder, the rewinding fixed shell and the rewinding fixed cylinder are rotatably connected, a core air cavity is arranged in the rewinding fixed cylinder, a core air channel is formed in the inner wall of the core air cavity, the core air channel penetrates through the outer wall of the rewinding fixed cylinder, and a plurality of core air holes are formed in the rewinding fixed shell and used for being in communication with the core air channel.

[0016] When the rewinding machine is in the core mode, the rewinding movable roller is located obliquely below the rewinding fixed roller, the core air channel faces the rewinding roller gap formed between the rewinding movable roller and the rewinding fixed roller, the rewinding fixed shell rotates and the rewinding fixed cylinder is static during the formation of the core winding drum in the rewinding roller gap, the core air cavity is connected to the vacuumizing device during the winding of the core winding drum, the right core air hole covered by the core air cavity generates an adsorption effect on the strip, thereby disconnecting the tail of the strip wound in the previous winding, the end of the strip is curled in the rewinding roller gap, and the curled end of the strip forms a new winding drum along with the continuous rotation of the rewinding fixed shell and the rewinding movable roller.

[0017] Preferably, the rewinding movable roller comprises a rewinding movable cylinder and a rewinding movable shell, the rewinding movable cylinder is fixedly arranged between the switching arms, the rewinding movable shell is sleeved on the rewinding movable cylinder, the inner wall of the rewinding movable shell is attached to the outer wall of the rewinding movable cylinder, the rewinding movable shell and the rewinding movable cylinder are rotatably connected, a coreless air cavity is arranged in the rewinding movable cylinder, a coreless air channel is formed in the inner wall of the coreless air cavity, the coreless air channel penetrates through the outer wall of the rewinding movable cylinder, and a plurality of coreless air holes are formed in the rewinding movable shell and used for being in communication with the coreless air channel.

[0018] By adopting the above technical scheme, when the working mode of the rewinding machine is the coreless mode, the rewinding movable roller is located obliquely above the rewinding fixed roller, the coreless air duct faces the rewinding roller gap formed between the rewinding movable roller and the rewinding fixed roller, the rewinding movable shell rotates and the rewinding movable cylinder is static in the process of forming the coreless reel in the rewinding roller gap, the coreless air cavity is communicated with the vacuumizing equipment in the process of realizing the winding of the coreless reel, the coreless air cavity covers the coreless air hole to produce the adsorption effect on the strip, the tail of the strip wound in the previous winding is disconnected, the strip end is curled in the rewinding roller gap, and the curled strip end forms a new reel with the continuous rotation of the rewinding fixed roller and the rewinding movable shell.

[0019] Preferably, the switching assembly comprises a switching shaft, a switching gear and a switching rack, the switching shaft penetrates through the switching arm, the switching shaft is fixedly connected with the switching arm, the switching shaft is rotatably connected with the right support, the switching gear is sleeved on the switching shaft, the switching gear is fixedly connected with the switching shaft, and the switching rack is slidably arranged on the right support and is in mesh with the switching gear.

[0020] By adopting the above technical scheme, the movement of the switching rack drives the rotation of the switching gear, the rotation of the switching gear drives the rotation of the switching shaft, and the rotation of the switching shaft drives the rotation of the switching arm, so that the movement of the rewinding movable roller is realized by the switching arm, and the position change effect of the rewinding movable roller and the rewinding fixed roller is realized.

[0021] Preferably, the switching assembly further comprises a switching motor, a switching block and a switching screw, the right support is provided with a switching groove, the switching motor is fixedly arranged in the switching groove, an output shaft of the switching motor is fixedly connected with one end of the switching screw, the other end of the switching screw is rotatably connected with the inner wall of the switching groove, the switching block is slidably arranged in the switching groove, the switching block is threadedly connected with the switching screw, and the switching block is fixedly connected with the switching rack.

[0022] By adopting the above technical scheme, the start of the switching motor drives the rotation of the switching screw, the rotation of the switching screw drives the movement of the switching block along the switching groove, and the movement of the switching block drives the movement of the switching rack.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. By arranging the machine base, the left support, the right support, the rewinding fixed roller, the core pipe support, the arc surface, the switching arm, the rewinding movable roller, the rewinding roller gap and the switching assembly, the switching time of the working mode of the rewinding machine is shortened, and the switching process of the working mode of the rewinding machine is simplified.

[0025] 2. By arranging the core support, the core pressing groove, the core pressing block, the core spring, the core pressing roller, the coreless support, the coreless pressing groove, the coreless pressing block, the coreless spring and the coreless pressing roller, the reel is limited in the rewinding roller gap for rewinding.

[0026] 3. By setting the rewinding fixed cylinder, the rewinding fixed shell, the core air cavity, the core air duct, the core air hole, the rewinding movable cylinder, the rewinding movable shell, the non-core air cavity, the non-core air duct and the non-core air hole, the effect of the strip coiling is realized. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of a multifunctional rewinding device structure with double-core selection in the core-free mode in the embodiment of the application.

[0028] Figure 2 is an enlarged view of part A in Figure 1

[0029] Figure 3 is a sectional view of the position relationship between the rewinding fixed roller and the rewinding movable roller in the core mode in the embodiment of the application.

[0030] Figure 4 is a schematic diagram of a multifunctional rewinding device structure with double-core selection in the core mode in the embodiment of the application.

[0031] Figure 5 is an enlarged view of part B in Figure 4

[0032] Figure 6 is a sectional view of the position relationship between the rewinding fixed roller and the rewinding movable roller in the core mode in the embodiment of the application.

[0033] Figure 7 is a schematic diagram of the position relationship between the conveyor belt and the core pipe frame in the embodiment of the application.

[0034] Figure 8 is a sectional view of the connection relationship between the right support and the switching assembly in the embodiment of the application.

[0035] BRIEF DESCRIPTION OF DRAWINGS 1, machine base; 11, left support; 12, right support; 2, rewinding fixed roller; 21, rewinding fixed cylinder; 211, core air cavity; 213, core air duct; 22, rewinding fixed shell; 221, core air hole; 3, rewinding movable roller; 31, rewinding movable cylinder; 311, non-core air cavity; 313, non-core air duct; 32, rewinding movable shell; 321, non-core air hole; 4, rewinding roller gap; 5, core pipe frame; 51, arc surface; 6, switching assembly; 61, switching shaft; 62, switching gear; 63, switching rack; 64, switching motor; 65, switching block; 66, switching screw; 67, switching groove; 68, switching arm; 7, conveyor belt; 71, conveying motor; 72, transmission roller; 73, supporting roller; 8, core pressure roller; 81, core pressure block; 82, core spring; 83, core pressure groove; 84, core support; 9, non-core pressure roller; 91, non-core pressure block; 92, non-core spring; 93, non-core pressure groove; 94, non-core support. ​​DETAILED DESCRIPTION

[0036] The application will be further described below in conjunction with the accompanying drawings. Figures 1-8 The application will be further described below in conjunction with the accompanying drawings.

[0037] The application discloses a double-core selectable multifunctional rewinding device. Referring to Figures 1-8 , a left support 11 and a right support 12 are installed on a machine base 1. A rewinding fixed roller 2 is rotatably arranged on the left support 11, and a core pipe rack 5 is installed below the rewinding fixed roller 2, and the top of the core pipe rack 5 is an arc surface 51. A group of switching arms 68 are rotatably arranged on the right support 12, and a rewinding movable roller 3 is rotatably arranged between the switching arms 68. The rewinding movable roller 3 and the rewinding fixed roller 2 form a rewinding roller gap 4. A switching assembly 6 is jointly installed between the switching arms 68 and the right support 12, and the switching assembly 6 is used to adjust the positional relationship between the rewinding movable roller 3 and the rewinding fixed roller 2. When the working mode of the rewinding machine is a core mode, the switching assembly 6 drives the switching arms 68 to rotate, so that the rewinding movable roller 3 moves to the obliquely lower side of the rewinding fixed roller 2. At this time, the rewinding fixed roller 2 is the upper rewinding roller, the rewinding movable roller 3 is the lower rewinding roller, and the core pipe is placed in the rewinding roller gap 4 between the rewinding fixed roller 2 and the rewinding movable roller 3 through the core pipe rack 5. When the working mode of the rewinding machine is a coreless mode, the switching assembly 6 drives the switching arms 68 to rotate, so that the rewinding movable roller 3 moves to the obliquely upper side of the rewinding fixed roller 2. At this time, the rewinding movable roller 3 is the upper rewinding roller, the rewinding fixed roller 2 is the lower rewinding roller, and the core pipe cannot be placed in the rewinding roller gap 4 between the rewinding fixed roller 2 and the rewinding movable roller 3 through the core pipe rack 5. Therefore, when the coreless mode and the core mode of the rewinding machine are switched, only the switching assembly 6 drives the switching arms 68 to rotate, so that the switching time of the working mode of the rewinding machine is shortened, and the switching process of the working mode of the rewinding machine is simplified.

[0038] Referring to Figure 1 and Figure 7 , a conveying motor 71 is installed on the machine base 1, and a transmission roller 72 is installed on the output shaft of the conveying motor 71. A plurality of support rollers 73 are rotatably arranged on the machine base 1, and the transmission roller 72 and the support rollers 73 are parallel to each other. The transmission roller 72 and the support rollers 73 jointly sleeve a conveying belt 7, and the conveying belt 7 is located on the side of the core pipe rack 5 away from the right support 12. When the conveying motor 71 is started, the conveying motor 71 drives the transmission roller 72 to rotate, the transmission roller 72 drives the conveying belt 7 to move, and the conveying belt 7 moves the core pipe to the core pipe rack 5.

[0039] In order to limit the winding drum in the rewinding roller gap 4 for rewinding, referring to Figures 1-6The core support 84 is installed on the left support 11, and the coreless support 94 is installed between the switching arms 68. The core support 84 is provided with a core pressing groove 83, and the coreless support 94 is provided with a coreless pressing groove 93. The core pressing block 81 is slidably arranged in the core pressing groove 83, and the coreless pressing block 91 is slidably arranged in the coreless pressing groove 93. The core spring 82 is installed between the core pressing groove 83 and the core pressing block 81, and the coreless spring 92 is installed between the coreless pressing groove 93 and the coreless pressing block 91. The core pressing roller 8 is rotatably arranged on the core pressing block 81, and the coreless pressing roller 9 is rotatably arranged on the coreless pressing block 91. The core pressing roller 8 and the coreless pressing roller 9 are located on the side, away from the conveying belt 7, of the rewinding fixed roller 2, and the core pressing roller 8, the coreless pressing roller 9, the rewinding fixed roller 2 and the rewinding movable roller 3 are arranged in parallel. When the working mode of the rewinding machine is the core mode, the rewinding movable roller 3 is located obliquely below the rewinding fixed roller 2, and the rewinding roller gap 4 formed between the rewinding movable roller 3 and the rewinding fixed roller 2 is located on the side of the core pressing roller 8. In the process of forming the core reel in the rewinding roller gap 4, the core pressing roller 8 is pressed against the core reel under the action of the core spring 82, so that the core reel is limited between the rewinding movable roller 3, the rewinding fixed roller 2 and the core pressing roller 8.

[0040] In order to realize the effect of the core reel starting to be wound in the rewinding roller gap 4, with reference to Figures 1-6 The rewinding fixed roller 2 comprises a rewinding fixed cylinder 21 and a rewinding fixed shell 22. The rewinding fixed cylinder 21 is welded on the left support 11, and the rewinding fixed shell 22 is sleeved on the rewinding fixed cylinder 21. The inner wall of the rewinding fixed shell 22 and the outer wall of the rewinding fixed cylinder 21 are mutually attached, and the rewinding fixed shell 22 is rotationally connected with the rewinding fixed cylinder 21. The rewinding fixed cylinder 21 is provided with a core air cavity 211, and the inner wall of the core air cavity 211 is provided with a core air channel 213. The core air channel 213 penetrates through the outer wall of the rewinding fixed cylinder 21. A plurality of core air holes 221 are formed on the rewinding fixed shell 22, and the core air holes 221 are used for being in communication with the core air channel 213. When the working mode of the rewinding machine is the core mode, the rewinding movable roller 3 is located obliquely below the rewinding fixed roller 2, and the core air channel 213 faces the rewinding roller gap 4 formed between the rewinding movable roller 3 and the rewinding fixed roller 2. In the process of forming the core reel in the rewinding roller gap 4, the rewinding fixed shell 22 rotates, and the rewinding fixed cylinder 21 is static. In the process of realizing the starting of the core reel, the core air cavity 211 is connected with a vacuumizing device, so that the right core air hole covered by the core air cavity 211 produces an adsorption effect on the strip, thereby disconnecting the tail of the strip after the previous rewinding, forming a curl of the strip end in the rewinding nip, and forming a new reel with the curled strip end with the continuous rotation of the rewinding fixed shell 22 and the rewinding movable roller 3.

[0041] In order to realize the effect of the coreless winding drum winding on the rewinding roll gap 4, referring to Figures 1-6 , the rewinding movable roller 3 comprises a rewinding movable cylinder 31 and a rewinding movable shell 32, the rewinding movable cylinder 31 is welded between the switching arms 68, the rewinding movable shell 32 is sleeved on the rewinding movable cylinder 31, the inner wall of the rewinding movable shell 32 and the outer wall of the rewinding movable cylinder 31 are matched with each other, and the rewinding movable shell 32 is rotationally connected with the rewinding movable cylinder 31. A coreless air cavity 311 is arranged in the rewinding movable cylinder 31, a coreless air duct 313 is formed in the inner wall of the coreless air cavity 311, and the coreless air duct 313 penetrates through the outer wall of the rewinding movable cylinder 31. A plurality of coreless air holes 321 are formed on the rewinding movable shell 32, and the coreless air holes 321 are used to communicate with the coreless air duct 313. When the working mode of the rewinder is the coreless mode, the rewinding movable roller 3 is located obliquely above the rewinding fixed roller 2, the coreless air duct 313 faces the rewinding roll gap 4 formed between the rewinding movable roller 3 and the rewinding fixed roller 2, and the rewinding movable shell 32 rotates and the rewinding movable cylinder 31 is stationary during the formation of the coreless winding drum in the rewinding roll gap 4. In the process of realizing the winding of the coreless winding drum, the coreless air cavity 311 is communicated with the vacuum pumping equipment, so that the coreless air holes 321 covered by the coreless air cavity 311 have an adsorption effect on the strip, the tail of the strip after the completion of the previous rewinding is disconnected, the strip end is curled in the rewinding roll gap, and the curled strip end forms a new winding drum as the rewinding fixed roller 2 and the rewinding movable shell 32 continue to rotate.

[0042] In order to realize the effect of the position change of the rewinding movable roller 3 and the rewinding fixed roller 2, referring to Figures 1-6 Figures 1-8 , the switching assembly 6 comprises a switching shaft 61, a switching gear 62, a switching rack 63, a switching motor 64, a switching block 65 and a switching screw 66. The switching groove 67 is formed on the right support 12, the switching motor 64 is installed in the switching groove 67, one end of the output shaft of the switching motor 64 is welded with the switching screw 66, and the other end of the switching screw 66 is rotationally connected with the inner wall of the switching groove 67. The switching block 65 is slidably arranged in the switching groove 67, the switching block 65 is threadedly connected with the switching screw 66, and the switching rack 63 is welded on the switching block 65. The switching shaft 61 is fixedly connected with the switching arm 68, and the switching shaft 61 is rotationally connected with the right support 12. The switching gear 62 is sleeved on the switching shaft 61, the switching gear 62 is welded with the switching shaft 61, and the switching rack 63 is engaged with the switching gear 62. The switching motor 64 drives the switching screw 66 to rotate, the switching screw 66 drives the switching block 65 to move along the switching groove 67, and the switching block 65 drives the switching rack 63 to move. The switching rack 63 drives the switching gear 62 to rotate, the switching gear 62 drives the switching shaft 61 to rotate, and the switching shaft 61 drives the switching arm 68 to rotate, so that the switching arm 68 drives the rewinding movable roller 3 to move, thereby realizing the effect of the position change of the rewinding movable roller 3 and the rewinding fixed roller 2.

[0043] The implementation principle of the embodiment of the double-core selectable multifunctional rewinding device is as follows: when the working mode of the rewinding machine is the core mode, the switching motor 64 is started to drive the switching arm 68 to rotate, and the rewinding movable roller 3 is moved to the obliquely lower side of the rewinding fixed roller 2. At this time, the rewinding fixed roller 2 is the upper rewinding roller, the rewinding movable roller 3 is the lower rewinding roller, and the core pipe is placed in the rewinding roller gap 4 between the rewinding fixed roller 2 and the rewinding movable roller 3 through the core pipe holder 5. When the working mode of the rewinding machine is the coreless mode, the switching motor 64 is started to drive the switching arm 68 to rotate, and the rewinding movable roller 3 is moved to the obliquely upper side of the rewinding fixed roller 2. At this time, the rewinding movable roller 3 is the upper rewinding roller, the rewinding movable roller 3 is the lower rewinding roller, and the core pipe cannot be placed in the rewinding roller gap 4 between the rewinding fixed roller 2 and the rewinding movable roller 3 through the core pipe holder 5. Therefore, when the rewinding machine is switched between the coreless mode and the core mode, only the switching assembly 6 needs to drive the switching arm 68 to rotate, the switching time of the working mode of the rewinding machine is shortened, and the switching process of the working mode of the rewinding machine is simplified.

[0044] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multifunctional rewinding device with double cores optional, comprising a machine base (1), a left bracket (11) and a right bracket (12) fixedly arranged on the machine base (1), a rewinding fixed roller (2) rotatably arranged on the left bracket (11), a core tube rack (5) arranged below the rewinding fixed roller (2), the top of the core tube rack (5) being an arc-shaped surface (51), characterized in that: A set of switching arms (68) are rotationally arranged on the right support (12), a rewinding movable roller (3) is rotationally arranged between the switching arms (68), a rewinding roller gap (4) is formed between the rewinding movable roller (3) and a rewinding fixed roller (2), a switching assembly (6) is jointly arranged between the switching arms (68) and the right support (12), and the switching assembly (6) is used for adjusting the positional relationship between the rewinding movable roller (3) and the rewinding fixed roller (2).

2. A dual core selectable multi-functional rewinding apparatus as claimed in claim 1, wherein: A conveying motor (71) is fixedly arranged on the machine base (1), a transmission roller (72) is fixedly arranged on the output shaft of the conveying motor (71), a plurality of supporting rollers (73) are rotationally arranged on the machine base (1), the transmission roller (72) and the supporting rollers (73) are parallel to each other, and a conveying belt (7) is arranged on the side, away from the right support (12), of the core pipe support (5), and the conveying belt (7) is jointly sleeved on the transmission roller (72) and the supporting rollers (73).

3. A dual core selectable multi-functional rewinding apparatus as claimed in claim 2, wherein: A core support (84) is fixedly arranged on the left support (11), a core pressing groove (83) is formed in the core support (84), a core pressing block (81) is slidably arranged in the core pressing groove (83), a core spring (82) is arranged between the core pressing groove (83) and the core pressing block (81), and a core pressing roller (8) is rotationally arranged on the core pressing block (81) and located on the side, away from the conveying belt (7), of the rewinding fixed roller (2), wherein the core pressing roller (8), the rewinding fixed roller (2) and the rewinding movable roller (3) are arranged in parallel.

4. A dual core selectable multi-functional rewinding apparatus as claimed in claim 2, wherein: A coreless support (94) is fixedly arranged between the switching arms (68), a coreless pressing groove (93) is formed in the coreless support (94), a coreless pressing block (91) is slidably arranged in the coreless pressing groove (93), a coreless spring (92) is arranged between the coreless pressing groove (93) and the coreless pressing block (91), and a coreless pressing roller (9) is rotationally arranged on the coreless pressing block (91) and located on the side, away from the conveying belt (7), of the rewinding fixed roller (2), wherein the coreless pressing roller (9), the rewinding fixed roller (2) and the rewinding movable roller (3) are arranged in parallel.

5. A dual core selectable multi-functional rewinding apparatus as claimed in claim 1, wherein: The rewinding fixed roller (2) comprises a rewinding fixed cylinder (21) and a rewinding fixed shell (22), the rewinding fixed cylinder (21) is fixedly arranged on the left support (11), the rewinding fixed shell (22) is sleeved on the rewinding fixed cylinder (21), the inner wall of the rewinding fixed shell (22) is attached to the outer wall of the rewinding fixed cylinder (21), the rewinding fixed shell (22) is rotationally connected with the rewinding fixed cylinder (21), a core air cavity (211) is arranged in the rewinding fixed cylinder (21), a core air channel (213) is formed in the inner wall of the core air cavity (211), the core air channel (213) penetrates through the outer wall of the rewinding fixed cylinder (21), a plurality of core air holes (221) are formed in the rewinding fixed shell (22), and the core air holes (221) are used for being in communication with the core air channel (213).

6. A dual core selectable multi-functional rewinding apparatus as claimed in claim 1, wherein: The rewinding roller (3) comprises a rewinding movable cylinder (31) and a rewinding movable shell (32), the rewinding movable cylinder (31) is fixedly arranged between the switching arms (68), the rewinding movable shell (32) is sleeved on the rewinding movable cylinder (31), the inner wall of the rewinding movable shell (32) and the outer wall of the rewinding movable cylinder (31) are matched with each other, the rewinding movable shell (32) is rotationally connected with the rewinding movable cylinder (31), the coreless air cavity (311) is arranged in the rewinding movable cylinder (31), the coreless air duct (313) is arranged on the inner wall of the coreless air cavity (311), the coreless air duct (313) penetrates through the outer wall of the rewinding movable cylinder (31), a plurality of coreless air holes (321) are arranged on the rewinding movable shell (32), and the coreless air holes (321) are used for communicating with the coreless air duct (313).

7. A dual core selectable multi-functional rewinding apparatus as claimed in claim 1, wherein: The switching assembly (6) comprises a switching shaft (61), a switching gear (62) and a switching rack (63), the switching shaft (61) penetrates through the switching arm (68), the switching shaft (61) is fixedly connected with the switching arm (68), the switching shaft (61) is rotationally connected with the right support (12), the switching gear (62) is sleeved on the switching shaft (61), the switching gear (62) is fixedly connected with the switching shaft (61), and the switching rack (63) is slidingly arranged on the right support (12). The switching rack (63) is engaged with the switching gear (62).

8. A dual core selectable multi-functional rewinding apparatus as claimed in claim 7, wherein: The switching assembly (6) further comprises a switching motor (64), a switching block (65) and a switching screw rod (66), the right support (12) is provided with a switching groove (67), the switching motor (64) is fixedly arranged in the switching groove (67), one end of the output shaft of the switching motor (64) is fixedly connected with the switching screw rod (66), the other end of the switching screw rod (66) is rotationally connected with the inner wall of the switching groove (67), the switching block (65) is slidingly arranged in the switching groove (67), the switching block (65) is threadedly connected with the switching screw rod (66), and the switching block (65) is fixedly connected with the switching rack (63).

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