Paper roll glue spraying and tail sealing device and method

Abstract

The invention provides a paper roll glue spraying and tail sealing device and method. The device and the method are jointly characterized in that a glue spraying mechanism and an unfolding mechanism are adopted, a tail searching mechanism used for determining the position of the tail of the paper roll and a paper roll rolling mechanism used for driving the paper roll to roll from the tail searching mechanism to the unfolding mechanism are further arranged, and the path of the paper roll rolling from the tail searching mechanism to the unfolding mechanism is set to be a specific length. Due to the specific path length, when the paper roll rolls to the unfolding mechanism and stops rolling, the paper tail of the paper roll is located at the position where the paper roll can be unfolded by airflow blown out by a first air blowing nozzle of the unfolding mechanism. The paper roll glue spraying and tail sealing device has the advantages that the paper tail of the paper roll can be immediately unfolded as long as the paper roll rolls to the unfolding mechanism, the working efficiency of the unfolding mechanism is improved, the time for adjusting the position of the paper tail before glue spraying is shortened equivalently, and the working efficiency of the paper roll glue spraying and tail sealing device is improved on the whole.

Description

Technical Field

[0001] The invention relates to paper roll processing equipment, in particular to a paper roll glue spraying tail sealing device which uses glue to stick the paper tail of a paper roll onto the paper roll in the paper roll processing equipment. Background Art

[0002] The paper roll glue tail sealing device is provided with a glue spraying mechanism and an unfolding mechanism for unfolding the paper tail for the glue spraying mechanism. The unfolding mechanism unfolds the paper tail of the paper roll by the air flow blown out by the air blowing nozzle. The glue spraying mechanism sprays glue toward the unfolded paper tail. Since the position of the end of the paper tail of each roll of paper sent to the unfolding mechanism in the circumferential direction of the paper roll is random, it cannot be guaranteed that the air blowing nozzle can unfold the paper tail (for example, the end of the paper tail may just be pressed on the bottom of the paper roll). Therefore, when the paper roll is sent to the unfolding mechanism, the air blowing nozzle cannot unfold the paper tail immediately. The paper roll must be rotated first to adjust the paper tail to a position where it can be blown up by the air blowing nozzle. This increases the time that the glue spraying mechanism waits for the paper tail to be unfolded. Therefore, the existing paper roll glue tail sealing device has the problem of low working efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a paper roll glue spraying and sealing device to improve the working efficiency of the device. The present invention also provides a paper roll glue spraying and sealing method.

[0004] The device of the present invention is implemented as follows: the paper roll glue spraying tail sealing device includes a glue spraying mechanism and an unfolding mechanism, the unfolding mechanism is provided with a first air blowing nozzle, the airflow blown by the first air blowing nozzle unfolds the paper tail of the paper roll, and the glue spraying mechanism sprays glue toward the paper tail unfolded by the first air blowing nozzle. In particular, the paper roll glue spraying tail sealing device also includes a tail-finding mechanism for determining the position of the paper tail of the paper roll, a paper roll rolling mechanism for driving the paper roll to roll from the tail-finding mechanism to the unfolding mechanism, and the path of the paper roll from the tail-finding mechanism to the unfolding mechanism is set to a specific length. The specific path length is such that when the paper roll rolls to the unfolding mechanism and stops rolling, the paper tail of the paper roll is already in a position that can be unfolded by the airflow blown by the first air blowing nozzle of the unfolding mechanism.

[0005] As the best implementation, the tail-finding mechanism includes a driving unit, a second air blowing nozzle, and a sensor for sensing the position of the paper tail. The driving unit drives the paper roll to rotate in situ around its own axis, and the second air blowing nozzle blows air toward the rotating paper roll in situ to unfold the paper tail of the paper roll. The sensor senses whether the paper tail of the rotating paper roll in situ has been unfolded.

[0006] As a best embodiment, the driving part includes a rotating roller and a circulating transmission belt, and the transmission belt and the rotating roller clamp the paper roll together and drive the paper roll to rotate in situ around its own axis.

[0007] As a best embodiment, the paper roll rolling mechanism includes a supporting platform arranged between the tail-finding mechanism and the unfolding mechanism, and a transmission belt pressed on the top of the paper roll to drive the paper roll to roll along the supporting platform.

[0008] As a best embodiment, the unfolding mechanism is provided with a groove for supporting the paper roll, and the paper roll rolled to the unfolding mechanism stops in the groove.

[0009] As a best embodiment, the groove can be turned upwards until the paper roll rolls out of the groove.

[0010] The paper roll glue spraying tail sealing method of the present invention is implemented as follows: a glue spraying mechanism and an unfolding mechanism are adopted, the unfolding mechanism is provided with a first air blowing nozzle, the paper tail of the paper roll is unfolded by the airflow blown by the first air blowing nozzle, and the glue spraying mechanism is used to spray glue toward the paper tail unfolded by the first air blowing nozzle. In particular, a tail-finding mechanism and a paper roll rolling mechanism are used, the tail-finding mechanism is first used to determine the position of the paper tail of the paper roll, and then the paper roll rolling mechanism is used to drive the paper roll to roll from the tail-finding mechanism to the unfolding mechanism, and the path of the paper roll from the tail-finding mechanism to the unfolding mechanism is set to a specific length. The specific path length is such that when the paper roll rolls to the unfolding mechanism and stops rolling, the paper tail of the paper roll is already in a position that can be unfolded by the airflow blown by the first air blowing nozzle of the unfolding mechanism.

[0011] As the best implementation, the method for the tail-finding mechanism to determine the position of the tail of the paper roll is to set a driving unit, a second air blowing nozzle and a sensor for sensing the position of the tail of the paper roll in the tail-finding mechanism, drive the paper roll to rotate in situ around its own axis by the driving unit, blow air toward the rotating paper roll in situ by the second air blowing nozzle so that the tail of the paper roll is unfolded, and sense whether the tail of the rotating paper roll in situ has been unfolded by the sensor.

[0012] As the best implementation mode, when the sensor senses the unfolded paper tail, the driving unit continues to drive the paper roll to rotate in situ around its own axis to rewind the unfolded paper tail. When the sensor senses that the end of the rewinding paper tail just passes through the sensor, the driving unit continues to drive the paper roll to rotate in situ around its own axis to rewind the unfolded paper tail. Until the unfolded paper tail is completely rewound and the end of the paper tail just rotates to a predetermined position in the circumferential direction of the paper roll, the action of using the paper roll rolling mechanism to drive the paper roll to roll from the tail-seeking mechanism to the unfolding mechanism is executed.

[0013] As the best implementation mode, when the sensor senses that the paper tail has been unfolded, the driving unit continues to drive the paper roll to rotate in place around its own axis to rewind the unfolded paper tail. When the sensor senses that the end of the rewinding paper tail just passes through the sensor, the paper roll rolling mechanism is used to drive the paper roll to roll from the tail-seeking mechanism to the unfolding mechanism.

[0014] The advantages of the present invention are as follows: on the one hand, the tail-finding mechanism determines the position of the tail of the paper roll and the process of the paper roll rolling from the tail-finding mechanism to the unfolding mechanism, which plays a role in adjusting and unifying the position of the tail of the paper roll, ensuring that the tail of each paper roll rolling to the unfolding mechanism must be in a position where it can be unfolded by the air flow blown out by the first air blowing nozzle of the unfolding mechanism. As long as the paper roll rolls to the unfolding mechanism, the tail of the paper roll can be immediately unfolded by the first air blowing nozzle, thereby improving the working efficiency of the unfolding mechanism; on the other hand, from the perspective of the continuous production process, the action of the glue spraying mechanism spraying glue toward the tail of the previous paper roll can be carried out simultaneously with the action of the tail-finding mechanism determining the position of the tail of the next paper roll, which is equivalent to shortening the time for adjusting the position of the tail, thereby improving the working efficiency of the paper roll glue spraying tail sealing device as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the driving part of the tail-finding mechanism driving the paper roll to rotate in situ around its own axis; Figure 3 It is a schematic diagram of the tail-finding mechanism unfolding the tail of the paper roll to a predetermined length; Figure 4 It is a schematic diagram of the paper roll rolling mechanism driving the paper roll to roll from the tail-seeking mechanism to the unwinding mechanism; Figure 5 It is a schematic diagram of the paper roll rolling to the unwinding mechanism; Figure 6 is a schematic diagram of the groove of the unwinding mechanism being turned upward until the paper roll rolls out of the groove; Figure 7 This is a schematic diagram showing that the end of the paper tail in the rewind just passes the sensor; Figure 8 It is a comparative schematic diagram of the tail-finding mechanism changing the predetermined position of the end of the paper tail in the circumferential direction of the paper roll for two paper rolls with different diameters; Fig. 9 is a structural diagram of Embodiment 2 of the present invention; Fig.10 yes Fig. 9 The embodiment shown is a schematic diagram of the paper roll when the transmission belt drives it to roll to the unwinding mechanism; Fig.11 is a schematic diagram of the structure of Embodiment 3 of the present invention; Fig.12 It is a schematic diagram of a pushing member pushing a paper roll to a supporting platform. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention is described more fully below by way of examples. The examples provide embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in the examples.

[0017] It should be noted that the “first” and “second” mentioned in the present invention are only used to distinguish the names and do not represent specific quantities and orders. Embodiment 1

[0018] See also Figure 1 The paper roll glue spraying and sealing device is provided with a rotating roller 1, a circulating transmission belt 2, a second blowing nozzle 4 and a sensor 5. Figure 2 As shown, the transmission belt 2 and the rotating roller 1 sandwich the paper roll 3 and drive the paper roll 3 to rotate in situ around its own axis. The transmission belt 2 and the rotating roller 1 constitute the driving part of this embodiment for driving the paper roll to rotate in situ around its own axis. Figure 3 As shown, the second air blowing nozzle 4 blows air toward the paper roll 3 rotating in place so that the paper tail 3a of the paper roll 3 is unfolded. The sensor 5 senses whether the paper tail of the paper roll rotating in place has been unfolded. The driving part, the second air blowing nozzle 4, and the sensor 5 constitute a tail-finding mechanism for determining the position of the paper tail of the paper roll in this embodiment.

[0019] See also Figure 1 The paper roll glue spraying and sealing device is provided with a groove 6 and a first blowing nozzle 7. The groove 6 and the first blowing nozzle 7 constitute the unfolding mechanism of this embodiment. Figure 5 As shown, the paper roll 3 is supported by the groove 6, and the paper roll 3 rolled to the unwinding mechanism stops in the groove 6. Figure 5 As shown, the first blowing nozzle 7 blows air toward the paper roll 3 in the groove 6 to unfold the paper tail 3a of the paper roll 3.

[0020] See also Figure 1 The paper roll glue spraying and sealing device is provided with a glue spraying mechanism 8 for spraying glue toward the paper tail unfolded by the unfolding mechanism. After the glue spraying mechanism 8 sprays glue toward the paper tail, Figure 6 As shown, the groove 6 is turned upward until the paper roll 3 rolls out of the groove 6. The groove 6 can be driven by a cylinder drive, a motor drive, etc.

[0021] See also Figure 1 A support platform 9 is provided between the tail-finding mechanism and the unfolding mechanism. Figure 4 As shown in FIG. 1 , the transmission belt 2 is pressed on the top of the paper roll 3, thereby driving the paper roll 3 to roll along the support platform 9. The support platform 9 and the transmission belt 2 constitute the paper roll rolling mechanism of this embodiment for driving the paper roll to roll from the tail-finding mechanism to the unwinding mechanism. In fact, the tail-finding mechanism and the paper roll rolling mechanism of this embodiment share the same transmission belt 2. The path of the paper roll 3 rolling from the tail-finding mechanism to the unwinding mechanism is set to a specific length, and the path length is such that when the paper roll 3 is Figure 5 When the paper roll 3 rolls to the unfolding mechanism and stops, the tail of the paper roll 3 is already in a position where it can be unfolded by the airflow blown by the first air blowing nozzle 7 of the unfolding mechanism.

[0022] One embodiment of the paper roll glue sealing method of the present invention is to use Figure 1 The paper roll glue spraying and sealing device shown in the figure. Figure 2 As shown, the paper rolls 3 to be sealed are sent one by one to the tail-finding mechanism by the paper roll dispenser 10 (or upstream equipment). When the paper roll 3 rolls to the position sandwiched between the transmission belt 2 and the rotating roller 1, the transmission belt 2 and the rotating roller 1 drive the paper roll 3 to rotate in situ around its own axis. While the paper roll 3 rotates in situ, the second air blowing nozzle 4 blows air toward the paper roll 3. Regardless of whether the tail of the paper roll is in a position where it can be unfolded by the airflow blown by the second air blowing nozzle 4 when the paper roll just enters the airflow range of the second air blowing nozzle 4, as the paper roll rotates, the paper tail will eventually rotate to a position where it can be unfolded by the airflow blown by the second air blowing nozzle 4. When the sensor 5 detects the unfolded paper tail 3a, it is equivalent to the tail-finding mechanism determining the position of the paper tail. As shown Figure 3 As shown, when the sensor 5 detects the unfolded paper tail 3a, the speed of the transmission belt 2 is made greater than the outer circle speed of the rotating roller 1 (the speed of the rotating roller 1 can become zero), so as Figures 4 to 5 As shown in FIG. 1 , the transmission belt 2 drives the paper roll 3 to roll along the support platform 9, so that the paper roll 3 falls into the groove 6 of the unfolding mechanism and stops rolling. Figure 3 Scroll to Figure 5 The path passed by the position shown is set to a specific length, and the path length is such that when the paper roll 3 rolls to the unrolling mechanism and stops rolling, the tail of the paper roll 3 is already in a position where it can be unrolled by the airflow blown by the first air blowing nozzle 7. Therefore, the tail-finding mechanism determines the position of the tail of the paper roll and the process of the paper roll rolling from the tail-finding mechanism to the unrolling mechanism, which plays a role in adjusting and unifying the position of the tail of the paper roll, ensuring that the tail of each roll rolling to the unrolling mechanism must be in a position where it can be unrolled by the airflow blown by the first air blowing nozzle 7 of the unrolling mechanism. As long as the paper roll 3 is Figure 5 As shown in the figure, the paper tail 3a of the paper roll can be immediately unfolded by the first blowing nozzle 7 when the paper roll is rolled to the unfolding mechanism, and the unfolding mechanism no longer needs to rotate the paper roll, thereby improving the working efficiency of the unfolding mechanism. Figure 5 As shown in the figure, after the tail of the paper roll 3 is unrolled, the glue spraying mechanism 8 immediately sprays glue toward the unrolled tail 3a. The glue spraying gun of the glue spraying mechanism 8 moves in a direction parallel to the axis of the paper roll while spraying glue, so that the unrolled tail 3a is glued over the entire width of the paper. Figure 6As shown, the groove 6 of the unfolding mechanism turns upward, so that the paper roll 3 rolls out of the groove 6. The paper roll 3 rolled out of the groove 6 rolls over the paper tail that has been glued with glue, and the paper tail is glued to the paper roll 3, so that the paper roll tail sealing work is completed.

[0023] The above-mentioned action process is only for one roll of paper. From the perspective of the continuous production process, every time the previous roll of paper leaves the tail-finding mechanism, the paper roll distributor (or upstream equipment) can send the next roll of paper to be sealed to the tail-finding mechanism, and the action of the tail-finding mechanism to determine the position of the paper tail of the next roll of paper can be carried out simultaneously with the action of the glue spraying mechanism spraying glue toward the paper tail of the previous roll of paper, which is equivalent to shortening the time for adjusting the position of the paper tail of the next roll of paper, thereby improving the working efficiency of the paper roll glue spraying tail sealing device as a whole.

[0024] As a further improvement of the method of the present invention, when the sensor 5 is Figure 3 As shown in the figure, after sensing the unrolled paper tail 3a, the paper roll is not immediately rolled out of the tail-finding mechanism, but the driving unit of the tail-finding mechanism continues to drive the paper roll 3 to rotate in situ around its own axis, so that the unrolled paper tail 3a is rolled back. It is best for the second blowing nozzle to stop blowing when the paper tail 3a is rolled back. Figure 7 As shown in the figure, when the end 3b of the rewound paper tail just passes the sensor 5, the driving unit continues to drive the paper roll 3 to rotate in situ around its own axis, so that the unrolled paper tail continues to rewind until the unrolled paper tail is completely rewound and the end of the paper tail just rotates to the predetermined position in the circumferential direction of the paper roll. Figures 4 to 5 The action of driving the paper roll from the tail-finding mechanism to the unfolding mechanism is shown. After such improvement, the present invention can flexibly adapt to paper rolls of different diameters. When producing different batches of paper rolls of different diameters, it is only necessary to adjust the predetermined position of the end of the paper tail in the circumferential direction of the paper roll in the tail-finding mechanism to always ensure that when the paper rolls of different diameters roll to the unfolding mechanism, the paper tail of the paper roll must be in a position that can be unfolded by the air flow blown by the first air nozzle of the unfolding mechanism, without changing the path length from the tail-finding mechanism to the unfolding mechanism due to the change in the diameter of the paper roll. This effect can be achieved by Figure 8 Assume that Figure 8 For a paper roll 3 of the diameter shown in (a), the tail-finding mechanism needs to rotate the end of the paper tail to a predetermined position M1 in the circumferential direction of the paper roll so that the paper tail of the paper roll rolled to the unfolding mechanism is just at the position N where it can be unfolded by the airflow blown by the first blowing nozzle. Figure 8 For paper rolls 3 with different diameters as shown in (b), the predetermined position of the end of the paper tail in the circumferential direction of the paper roll can be changed by the tail-finding mechanism, for example, the end of the paper tail is rotated to Figure 8 (b) The position M2 shown in Figure 2 can make Figure 8 (b) The tail of the paper roll rolled to the unwinding mechanism is still just located at the same Figure 8(a) The same position N, so there is no need to change the path length of the paper roll from the tail-finding mechanism to the unwinding mechanism due to the change in the paper roll diameter. The electronic control system of the paper roll glue spraying and sealing device uses a servo motor to control the rotation angle of various rotating parts including the rotating roller, which is a conventional setting. The position of the sensor in the present invention can be determined, so it is very convenient to change the predetermined position of the end of the paper tail in the tail-finding mechanism in the circumferential direction of the paper roll at any time through the human-machine exchange interface of the electronic control system.

[0025] The above-mentioned improved method has another advantage: the length of the paper tail unfolded by the paper roll rolled to the unfolding mechanism can be changed by simply changing the predetermined position of the end of the paper tail in the circumferential direction of the paper roll in the tail-finding mechanism, while the distance between the glue spraying mechanism and the unfolding mechanism remains unchanged, so that the distance between the glue sprayed on the paper tail by the glue spraying mechanism and the end of the paper tail can be easily adjusted.

[0026] As a simplified solution of the above improved method, the sensor 5 can also be used as Figure 7 When the end 3b of the paper tail in the rewinding is detected to have just passed the sensor 5, the sensor 5 is immediately executed. Figures 4 to 5 The action shown drives the paper roll to roll from the tail-seeking mechanism to the unwinding mechanism. Embodiment 2

[0027] See also Fig. 9 One of the differences between this embodiment and the first embodiment is that the transmission belt 2 of the tail-finding mechanism and the transmission belt 11 of the paper roll rolling mechanism are two independently operated transmission belts. The two transmission belts 2 and 11 are driven by driving pulleys 12 and 13 to circulate. The driven pulleys 14 and 15 of the two transmission belts 2 and 11 are installed on the same rotating shaft and can rotate freely. Fig. 9 Another difference between this embodiment and the first embodiment is that the deployment mechanism omits Figure 1 Groove 6 shown. See Fig.10 When the transmission belt 11 drives the paper roll 3 to roll to the unwinding mechanism, the transmission belt 11 stops running but still presses the top of the paper roll 3. After the glue spraying mechanism 8 sprays glue toward the unwinding paper tail 3a, the transmission belt 11 resumes running, driving the paper roll 3 to roll over the glued paper tail 3a, so that the paper tail 3a is glued to the paper roll 3. For details not described in this embodiment, please refer to the first embodiment. Embodiment 3

[0028] See also Fig.11The difference between this embodiment and the first embodiment is that neither the tail-finding mechanism nor the paper roll rolling mechanism uses a transmission belt. The driving part of the tail-finding mechanism is composed of two parallel rotating rollers 16 and 17. The two rotating rollers 16 and 17 support the paper roll 3 together and drive the paper roll 3 to rotate in situ around its own axis. The paper roll rolling mechanism of this embodiment is provided with a pushing member 18 for pushing the paper roll 3 from the tail-finding mechanism to the supporting platform 9. When the two rotating rollers 16 and 17 unfold the paper tail 3a of the paper roll 3 to a predetermined length, the pushing member 18 immediately moves as shown in FIG. Fig.12 As shown, the paper roll 3 is turned upward and pushed to roll onto the supporting platform 9. The paper roll 3 that has rolled onto the supporting platform 9 continues to roll by inertia until it falls into the groove 6 of the unfolding mechanism and stops rolling. It should be noted that the action of the push member 18 is not limited to turning upward, and can be, for example, horizontal translation. The push member 18 can be driven by a cylinder drive, a motor drive, or the like. For matters not described in detail in this embodiment, please refer to the first embodiment.

[0029] It should be noted that the sensor of the present invention may be but not limited to a photoelectric sensor; the rotating roller, the transmission belt, the first air blowing nozzle, the second air blowing nozzle and the groove of the present invention may be arranged in a plurality in the length direction of the paper roll; the supporting platform of the present invention may not be a complete flat plate, for example, it may be composed of a plurality of slats arranged at a certain interval; the rotating roller of the present invention is not limited to a single cylindrical shape, for example, it may be composed of a plurality of coaxially mounted discs. The transmission belt of the present invention may be but not limited to a belt.

[0030] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A paper roll glue-spraying tail sealing device, comprising a glue-spraying mechanism and an unfolding mechanism, wherein the unfolding mechanism is provided with a first air blowing nozzle, and the airflow blown out by the first air blowing nozzle unfolds the paper tail of the paper roll, and the glue-spraying mechanism sprays glue toward the paper tail unfolded by the first air blowing nozzle, wherein the glue-spraying mechanism is characterized in that: The paper roll also includes a tail-finding mechanism for determining the position of the tail of the paper roll, and a paper roll rolling mechanism for driving the paper roll to roll from the tail-finding mechanism to the unfolding mechanism. The path of the paper roll from the tail-finding mechanism to the unfolding mechanism is set to a specific length. The specific path length is such that when the paper roll rolls to the unfolding mechanism and stops rolling, the tail of the paper roll is already in a position where it can be unfolded by the airflow blown out by the first blowing nozzle of the unfolding mechanism.

2. The paper roll glue spraying and sealing device according to claim 1, characterized in that: The tail-finding mechanism includes a driving unit, a second air blowing nozzle, and a sensor for sensing the position of the paper tail. The driving unit drives the paper roll to rotate in situ around its own axis. The second air blowing nozzle blows air toward the rotating paper roll in situ to unfold the paper tail of the paper roll. The sensor senses whether the paper tail of the rotating paper roll in situ has been unfolded.

3. The paper roll glue spraying and sealing device according to claim 2, characterized in that: The driving part comprises a rotating roller and a circulating transmission belt, and the transmission belt and the rotating roller clamp the paper roll together and drive the paper roll to rotate in situ around its own axis.

4. The paper roll glue spraying and sealing device according to claim 1, characterized in that: The paper roll rolling mechanism comprises a supporting platform arranged between the tail-finding mechanism and the unfolding mechanism, and a transmission belt pressed on the top of the paper roll to drive the paper roll to roll along the supporting platform.

5. The paper roll glue spraying and sealing device according to claim 1, characterized in that: The unfolding mechanism is provided with a groove for supporting the paper roll, and the paper roll rolled to the unfolding mechanism stops in the groove.

6. The paper roll glue spraying and sealing device according to claim 5, characterized in that: The groove can be turned upward until the paper roll rolls out of the groove.

7. A method for sealing the tail of a paper roll by spraying glue, which adopts a spraying mechanism and an unfolding mechanism, wherein the unfolding mechanism is provided with a first air blowing nozzle, and the tail of the paper roll is unfolded by the airflow blown by the first air blowing nozzle, and the spraying mechanism is used to spray glue toward the tail of the paper unfolded by the first air blowing nozzle, wherein the method is characterized in that: A tail-finding mechanism and a paper roll rolling mechanism are used. The tail-finding mechanism is first used to determine the position of the tail of the paper roll, and then the paper roll rolling mechanism is used to drive the paper roll to roll from the tail-finding mechanism to the unfolding mechanism. The path of the paper roll from the tail-finding mechanism to the unfolding mechanism is set to a specific length. The specific path length is such that when the paper roll rolls to the unfolding mechanism and stops rolling, the tail of the paper roll is already in a position where it can be unfolded by the airflow blown out by the first blowing nozzle of the unfolding mechanism.

8. The paper roll tail sealing method according to claim 7, characterized in that: The method for the tail-finding mechanism to determine the position of the paper tail of the paper roll is to set a driving part, a second air blowing nozzle and a sensor for sensing the position of the paper tail in the tail-finding mechanism, drive the paper roll to rotate in situ around its own axis by the driving part, blow air toward the paper roll rotating in situ by the second air blowing nozzle so that the paper tail of the paper roll is unfolded, and sense whether the paper tail of the paper roll rotating in situ has been unfolded by the sensor.

9. The paper roll tail sealing method according to claim 8, characterized in that: When the sensor senses the unfolded paper tail, the driving unit continues to drive the paper roll to rotate in situ around its own axis to rewind the unfolded paper tail. When the sensor senses that the end of the rewinding paper tail just passes the sensor, the driving unit continues to drive the paper roll to rotate in situ around its own axis to rewind the unfolded paper tail. Until the unfolded paper tail is completely rewound and the end of the paper tail just rotates to a predetermined position in the circumferential direction of the paper roll, the action of using the paper roll rolling mechanism to drive the paper roll to roll from the tail-seeking mechanism to the unfolding mechanism is executed.

10. The paper roll glue-spraying and sealing method according to claim 8, characterized in that: When the sensor senses that the paper tail has been unrolled, the driving unit continues to drive the paper roll to rotate in situ around its own axis to rewind the unrolled paper tail. When the sensor senses that the end of the rewinding paper tail just passes through the sensor, the paper roll rolling mechanism is used to drive the paper roll to roll from the tail-seeking mechanism to the unwinding mechanism.

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