Cutting mechanism matched with unwinding

Abstract

The utility model discloses a cutting mechanism matched with unwinding. The cutting mechanism comprises a mounting frame, a first mounting part, a first guide roller, a second guide roller, a first driving part, a second mounting part, a pressing roller, a second driving part, a cutter and a third driving part. And when the paper roll on the unwinding shaft is unwound, the first mounting part is in a conveying state, and the pressing position is in a loosening state. And when the paper roll on the unwinding shaft is completely unwound, the unwinding shaft is suspended, the second driving part drives the pressing roller to press the paper between the first guide roller and the second guide roller, and the pressing position is switched into a pressing state. And the third driving part drives the cutter to move once to cut off the paper between the first guide roller and the second guide roller. Part of paper, left on the first guide roller, of the paper roll is drawn out, and a new unwinding shaft is replaced. The first mounting part is switched to be in a connecting state, the pressing position is switched to be in a loosening state, paper is led out from a new unwinding shaft, and the paper passes through the first guide roller and is connected with the paper left on the second guide roller in a bonding mode.

Description

Technical Field

[0001] This utility model relates to unwinding, and more particularly to a cutting mechanism that works in conjunction with unwinding. Background Technology

[0002] Composite paper is typically produced using a laminating machine. Two layers of paper to be laminated are unwound separately by an unwinding device and pulled along. One layer of composite paper is coated with adhesive by a roller, and the two layers are bonded together using this adhesive. The unwinding shaft of the unwinding device is used to install the roll of paper, unwinding the paper roll from the roll. When the paper roll is almost unwound, a new roll needs to be installed. This usually involves pausing the unwinding shaft, manually cutting the paper roll, installing the new roll, and drawing paper from the new roll to bond the cut end of the paper being pulled into the laminating machine. To improve efficiency, current unwinding devices are generally designed with two unwinding shafts. While one unwinding shaft is unwinding paper, the other unwinding shaft already has a new roll installed. When the paper roll is almost unwound, there's no need to install a new roll; simply swap the positions of the two unwinding shafts to complete the replacement with a new roll, drawing paper from the new roll to bond with the cut end of the paper roll. There are still some problems in the process of replacing paper rolls: paper rolls are generally wide, making it inconvenient to cut them, and the broken ends of the paper being drawn into the laminating machine are also prone to falling off the guide rollers. Utility Model Content

[0003] This application provides a cutting mechanism that works in conjunction with unwinding, which can solve the problems mentioned in the background art.

[0004] This application provides a cutting mechanism that works in conjunction with unwinding, comprising:

[0005] Mounting rack;

[0006] The first mounting part has its first end hinged to the mounting frame;

[0007] The first guide roller is rotatably connected to the second end of the first mounting part;

[0008] The second guide roller is rotatably connected to the first mounting part or the mounting frame;

[0009] The first drive unit is used to drive the first mounting unit to swing, so that the first guide roller switches between a connection state close to the drum and a conveying state far away from the drum.

[0010] The second mounting part is movably connected to the middle position of the first mounting part;

[0011] The pressure roller is rotatably connected to the second mounting part, and forms a pressing position between the first mounting part and the second guide roller;

[0012] The second drive unit is used to drive the second mounting unit to move, so that the clamping position can be switched between the clamping state and the loosening state.

[0013] The cutting tool is movably connected to the middle position of the first mounting part;

[0014] The third drive unit is used to drive the cutter to move, and the cutting position is between the first guide roller and the pressure roller.

[0015] In some embodiments, the movable connection between the second mounting portion and the first mounting portion is hinged, and the movable connection between the cutting tool and the first mounting portion is hinged.

[0016] In some embodiments, the third drive unit is a linkage assembly disposed between the tool holder of the cutting tool and the second drive unit.

[0017] In some embodiments, the third drive unit includes: an elastic member disposed between the tool holder and the first mounting part, and a slotted pin assembly disposed between the second mounting part and the tool holder; the elastic member is used to cause the tool to swing toward the cutting position; the slotted pin assembly is used to limit the swing of the tool so as to keep the tool away from the cutting position, and the restriction is released only when the clamping position is in the clamping state.

[0018] In some embodiments, the first drive unit is a first cylinder.

[0019] In some embodiments, the axis of the second guide roller coincides with the hinge point of the first mounting portion.

[0020] In summary, this application discloses a cutting mechanism for unwinding, comprising a mounting frame, a first mounting portion, a first guide roller, a second guide roller, a first drive portion, a second mounting portion, a pressure roller, a second drive portion, a cutter, and a third drive portion. When the paper roll on the unwinding shaft is unwound, the first mounting portion is in a conveying state, and the pressing position is in a released state. When the paper roll on the unwinding shaft is almost unwound, the unwinding shaft pauses, and the second drive portion drives the pressure roller to press the paper between the first and second guide rollers, switching the pressing position to a pressing state. The third drive portion drives the cutter to move once, cutting the paper between the first and second guide rollers. The portion of paper remaining on the first guide roller is removed, and a new unwinding shaft is replaced. The first mounting portion switches to a connected state, and the pressing position switches to a released state, drawing paper from the new unwinding shaft, passing through the first guide roller, and bonding it to the paper remaining on the second guide roller. The first mounting portion switches to a conveying state, rotating the unwinding shaft to wind up a portion of the paper, tautning the paper on the first and second guide rollers. The beneficial effects include: when used with the unwinding device, it makes changing to a new roll easier. Attached Figure Description

[0021] To better illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0022] Figure 1 This is a schematic diagram of the first installation section in the transport state of this application;

[0023] Figure 2 This is a front view of this application;

[0024] Figure 3 for Figure 2 Sectional view along the middle AA;

[0025] Figure 4 This is a schematic diagram of another type of third drive unit.

[0026] In the picture,

[0027] 1. Mounting bracket;

[0028] 2. First mounting part; 2a. Swing arm; 2b. Connecting strip;

[0029] 3. First guide roller;

[0030] 4. Second guide roller;

[0031] 5. First drive unit; 5a. First connecting arm;

[0032] 6. Second mounting part; 6a. Rotating shaft; 6b. Second connecting arm;

[0033] 7. Pressure rollers;

[0034] 8. Second drive unit; 8a. Third connecting arm;

[0035] 9. Cutting tools; 9a. Tool holder; 9b. Blade;

[0036] 10. Third drive unit; 10a. Elastic element; 10b. Pin-groove pair. Detailed Implementation

[0037] The following description is provided in conjunction with the accompanying drawings, which are for illustrative purposes only and not strictly to scale. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Unless otherwise specified, the embodiments in this application can be combined with each other.

[0038] Please see Figure 1 A cutting mechanism for unwinding includes a mounting frame 1, a first mounting part 2, a first guide roller 3, a second guide roller 4, a first drive part 5, a second mounting part 6, a pressure roller 7, a second drive part 8, a cutter 9, and a third drive part 10.

[0039] Mounting bracket 1 is used to install the cutting mechanism onto the laminator near the unwinding shaft. More specifically, two separate brackets can be used as mounting bracket 1, allowing paper to pass between the two brackets.

[0040] The first end of the first mounting part 2 is hinged to the mounting frame 1. More specifically, the first mounting part 2 may include two swing arms 2a and a connecting strip 2b fixedly connected between the two swing arms 2a, with the first ends of the two swing arms 2a hinged to the mounting frame 1.

[0041] The first guide roller 3 is rotatably connected to the second end of the first mounting part 2. More specifically, the two ends of the first guide roller 3 may be rotatably connected to the second ends of the two swing arms 2a, respectively.

[0042] The second guide roller 4 is rotatably connected to the first mounting part 2 or the mounting frame 1. That is, the paper unwound from the unwinding shaft enters the cutting mechanism, passes through the first guide roller 3 and the second guide roller 4 in sequence, and then leaves the cutting mechanism.

[0043] Please see Figure 1 and Figure 2 In some embodiments, the axis of the second guide roller 4 coincides with the hinge point of the first mounting portion 2. More specifically, a shaft can be fixedly connected to the outer side of the two swing arms 2a, the axis of which coincides with the axis of the second guide roller 4, and is used to hinge with the mounting frame 1.

[0044] During the swinging process of the first mounting part 2 relative to the mounting frame 1, the position of the first guide roller 3 relative to the mounting frame 1 and the position of the first guide roller 3 relative to the first mounting part 2 remain unchanged.

[0045] The first drive unit 5 is used to drive the first mounting unit 2 to swing, so that the first guide roller 3 switches between a connection state close to the drum and a conveying state far away from the drum.

[0046] In some embodiments, preferably, the first drive unit 5 is a first cylinder. Two stroke limits of the cylinder are used to correspond to the connection state and the conveying state of the first mounting unit 2. More specifically, the two shafts used to hinge with the mounting frame 1 can extend beyond the mounting frame 1, and a first connecting arm 5a is fixedly connected to the extended shaft. There are two first cylinders, with the cylinder body hinged to the mounting frame 1 and the piston rods respectively hinged to the two first connecting arms 5a.

[0047] Compared to using servo motors, rotary cylinders, etc. as the first drive unit 5, linear motion cylinders meet the positioning accuracy requirements of both connection and conveying states, while also being lower in cost and simpler to set up and debug.

[0048] The second mounting part 6 is movably connected to the middle position of the first mounting part 2. More specifically, the second mounting part 6 can swing relative to the first mounting part 2 or slide relative to the first mounting part 2.

[0049] Please see Figure 1 , Figure 2 and Figure 3 The pressure roller 7 is rotatably connected to the second mounting part 6, forming a pressing position between it and the first mounting part 2. This pressing position is located between the first guide roller 3 and the second guide roller 4. More specifically, there is a connecting strip 2b in the middle of the first mounting part 2, and the pressure roller 7 and the connecting strip 2b form the pressing position. That is, by moving the second mounting part 6 relative to the first mounting part 2, the distance between the pressure roller 7 and the connecting strip 2b is adjusted, so that the pressure roller 7 can press or release the paper between the first guide roller 3 and the second guide roller 4.

[0050] The second drive unit 8 is used to drive the second mounting unit 6 to move, so that the clamping position can switch between the clamping state and the loosening state.

[0051] In some embodiments, preferably, the movable connection between the second mounting portion 6 and the first mounting portion 2 is a hinge. More specifically, the second mounting portion 6 may include a rotating shaft 6a and two second connecting arms 6b; the rotating shaft 6a is rotatably connected to the first mounting portion 2, and the two second connecting arms 6b are connected to the first mounting portion 2.

[0052] Accordingly, referring to the configuration of the first mounting part 2 and the first driving part 5, the second mounting part 6 can be fixedly connected to the third connecting arm 8a at both hinge points, and the second driving part 8 can be two second cylinders, which are hinged between the third connecting arm 8a and the first mounting part 2.

[0053] The cutter 9 is movably connected to the middle position of the first mounting part 2. More specifically, the cutter 9 can swing relative to the first mounting part 2 or slide relative to the first mounting part 2. More specifically, the cutter 9 can include a cutter holder 9a and a blade 9b, the cutter holder 9a being movably connected to the first mounting part 2 and for fixing the blade 9b, the blade 9b being used to cut the paper between the first guide roller 3 and the second guide roller 4.

[0054] The third drive unit 10 is used to drive the movement of the cutting tool 9.

[0055] In some embodiments, preferably, the movable connection between the cutting tool 9 and the first mounting portion 2 is hinged. More specifically, the tool holder 9a may be H-shaped, with the two side portions used for hinged connection with the first mounting portion 2, and the middle portion used for fixed connection of the cutting tool 9b.

[0056] Correspondingly, the third drive unit 10 can employ two third cylinders, hinged between the tool holder 9a and the first mounting unit 2.

[0057] When the paper roll on the unwinding shaft is unwinding, the first mounting part 2 is in the conveying state, and the clamping position is in the loosened state. When the paper roll on the unwinding shaft is almost unwound, the unwinding shaft pauses, and the second drive part 8 drives the pressure roller 7 to clamp the paper between the first guide roller 3 and the second guide roller 4, switching the clamping position to the clamping state. The third drive part 10 drives the cutter 9 to move once, cutting the paper between the first guide roller 3 and the second guide roller 4. The portion of the paper roll remaining on the first guide roller 3 is pulled out, and a new unwinding shaft is replaced. The first mounting part 2 switches to the connecting state, and the clamping position switches to the loosened state. Paper is drawn from the new unwinding shaft, passes through the first guide roller 3, and adheres to the paper remaining on the second guide roller 4. The first mounting part 2 switches to the conveying state, rotates the unwinding shaft to wind up part of the paper, making the paper taut on the first guide roller 3 and the second guide roller 4.

[0058] Please see Figure 4 In some embodiments, combining the above-described "the movable connection between the second mounting part 6 and the first mounting part 2 is a hinge" and "the movable connection between the tool 9 and the first mounting part 2 is a hinge", the third drive part 10 may also be a linkage component disposed between the tool holder 9a and the second drive part 8.

[0059] Furthermore, the third drive unit 10 includes an elastic member 10a disposed between the tool holder 9a and the first mounting part 2, and a slotted pin pair 10b disposed between the second mounting part 6 and the tool holder 9a.

[0060] The elastic element 10a is used to cause the tool 9 to swing towards the cutting position. More specifically, the elastic element 10a may be a tension spring, with its two ends connected to the tool holder 9a and the first mounting part 2, respectively.

[0061] The slotted pin pair 10b is used to limit the swing of the tool 9, thereby keeping the tool 9 away from the cutting position. This restriction is released only when the clamping position is in the clamping state. More specifically, the tool holder 9a has a groove, and the second connecting arm 6b of the second mounting part 6 is fixedly connected to a cylinder that enters the groove to form the slotted pin pair 10b.

[0062] When the clamping position is in the loose state, the axis of the cylinder and the hinge point of the second mounting part 6 are misaligned, restricting the swing of the cutter 9 relative to the first mounting part 2 and keeping the cutter 9 away from the cutting position. When the clamping position is switched to the clamping state, the axis of the cylinder and the hinge point of the second mounting part 6 coincide. Under the action of the elastic member 10a, the cutter 9 swings relative to the first mounting part 2, and can swing until the cutter 9 holder abuts against the rotating shaft 6a of the second mounting part 6.

Claims

1. A cutting mechanism for use with unwinding, characterized in that, include: Mounting bracket (1); The first mounting part (2) is hinged at its first end to the mounting frame (1); The first guide roller (3) is rotatably connected to the second end of the first mounting part (2); The second guide roller (4) is rotatably connected to the first mounting part (2) or the mounting frame (1); The first drive unit (5) is used to drive the first mounting unit (2) to swing, so that the first guide roller (3) switches between a connection state close to the drum and a conveying state far away from the drum. The second mounting part (6) is movably connected to the middle position of the first mounting part (2); The pressure roller (7) is rotatably connected to the second mounting part (6) and forms a pressing position between the first guide roller (3) and the second guide roller (4) between the first mounting part (2); The second drive unit (8) is used to drive the second mounting unit (6) to move, so that the pressing position can be switched between the pressing state and the loosening state; The cutting tool (9) is movably connected to the middle position of the first mounting part (2); The third drive unit (10) is used to drive the cutter (9) to move, and the cutting position is between the first guide roller (3) and the pressure roller (7).

2. The cutting mechanism for cooperating with unwinding according to claim 1, characterized in that, The movable connection between the second mounting part (6) and the first mounting part (2) is a hinge, and the movable connection between the cutter (9) and the first mounting part (2) is a hinge.

3. The cutting mechanism for cooperating with unwinding according to claim 2, characterized in that, The third drive unit (10) is a linkage assembly disposed between the tool holder (9a) of the tool (9) and the second drive unit (8).

4. The cutting mechanism for cooperating with unwinding according to claim 3, characterized in that, The third drive unit (10) includes: an elastic member (10a) disposed between the tool holder (9a) and the first mounting part (2) and a slotted pin pair (10b) disposed between the second mounting part (6) and the tool holder (9a); the elastic member (10a) is used to cause the tool (9) to swing towards the cutting position; the slotted pin pair (10b) is used to limit the swing of the tool (9) so that the tool (9) is kept away from the cutting position, and the restriction is released only when the clamping position is the clamping state.

5. A cutting mechanism for cooperating with unwinding according to claim 1, characterized in that, The first drive unit (5) is the first cylinder.

6. A cutting mechanism for cooperating with unwinding according to claim 1, characterized in that, The axis of the second guide roller (4) coincides with the hinge point of the first mounting part (2).

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