Passive roll-up type liner paper on-line slitting apparatus

Abstract

The application provides a passive winding type online cutting equipment for laminated paper, which comprises a composite unit, wherein melted film material and raw paper are rolled to form laminated paper by compositing the film on the surface of the raw paper; and the passive winding type online cutting equipment for laminated paper further comprises a cutting unit, which is used for cutting the laminated paper produced by the composite unit into laminated paper with a predetermined width and winding the laminated paper by a second air expansion shaft, so that a plurality of cutting laminated paper rolls with flush ends are formed on the second air expansion shaft. The passive winding type online cutting equipment for laminated paper overcomes the left and right winding swing of the winding air expansion shaft, the left and right swing of the cutting laminated paper on the first winding light roller and the second winding light roller, and the combination of the cutting edges on both sides of the cutting seam under the electrostatic action, so that the ends of the cutting laminated paper rolls are flush. Thus, the cutting and winding of the composite laminated paper are completed online, the production efficiency is improved, and the production cost is saved.

Description

Technical Field

[0001] This application relates to a coated paper production equipment, and more particularly to a passive winding type online slitting equipment for coated paper. Background Technology

[0002] There are two types of winding methods in coated paper production equipment. One is active winding, where the air shaft used to wind the coated paper is connected to a motor and rotated by the motor. This winding method results in a neater rolled coated paper roll with clean edges on the air shaft. Active winding machines are more expensive. The other method is passive winding, where the air shaft is not driven by a motor but by two smooth rollers. Specifically, the air shaft and the two smooth rollers are arranged in a triangle, parallel to each other, with the air shaft located in the middle and above the two smooth rollers. The advantage of passive winding is lower equipment cost, but it also leads to unevenness at the winding end face of the coated paper roll on the air shaft. Therefore, coated paper rolls produced by passive winding need to be unloaded from the production line and taken to the next processing unit for trimming of the uneven ends. When producing narrow-width coated paper rolls, passive winding coated paper production equipment cannot perform online slitting on the same production line. Because the rolls are wound on the same air shaft, adjacent uneven ends will interlock. Typically, the entire roll is pulled to the slitting workshop, where it is slitted using a circular blade brake-guided slitting machine according to the required width. This method has relatively low production efficiency. Summary of the Invention

[0003] In view of the above problems, this application aims to propose a passive winding type online slitting device for coated paper, which can slit the coated paper before it is wound on the winding air shaft, and the end faces of each slit coated paper roll wound on the same winding air shaft are flush and will not bite together.

[0004] The passive winding online slitting equipment for coated paper of this application includes a composite unit in which molten film material and raw paper are rolled together to laminate the film onto the surface of the raw paper to form coated paper; the passive winding online slitting equipment for coated paper further includes a slitting unit, which is used to slit the coated paper produced by the composite unit into coated paper of a predetermined width and passively wind it up on a second air shaft to form multiple slit coated paper rolls with flush end faces.

[0005] Preferably, the slitting unit includes a first winding optical roller and a second winding optical roller; the first winding optical roller and the second winding optical roller are arranged parallel to each other between the mounting walls on their left and right sides, and there is a predetermined interval between them; the first winding optical roller and the second winding optical roller are driven by a motor to rotate synchronously; a second air shaft is arranged above the interval between the first winding optical roller and the second winding optical roller, and is parallel to the first winding optical roller and the second winding optical roller; the slit coated paper is transferred between the first winding optical roller, the second winding optical roller and the second air shaft, and wound onto the second air shaft, and the second air shaft rotates as the first winding optical roller and the second winding optical roller rotate, thereby realizing the winding operation of the slit coated paper on the second air shaft.

[0006] Preferably, bearings are provided at both ends of the second air shaft; the two ends of the second air shaft are pressed by cylinders, thereby pressing the second air shaft onto the first winding roller and the second winding roller.

[0007] Preferably, the cylinder is fixed on the corresponding mounting wall; corresponding to each end of the second air shaft, a slide is formed on the mounting wall, and a slider is installed in the slide. The slider is installed at the output end of the corresponding cylinder; an arc-shaped notch is formed on the lower side of each slider, and the arc-shaped notch is used to press against the bearings at both ends of the second air shaft, ensuring the pressing force at both ends of the second air shaft while preventing the second air shaft from swinging left and right.

[0008] Preferably, masking tape is wound around the first winding roller and the second winding roller respectively. The masking tape has raised points on its surface to increase the coefficient of friction. The masking tape on the first winding roller is wound in segments, with a 2-3mm gap between each segment of the masking tape without any masking tape being wound. The surface of the second winding roller is completely wrapped with masking tape without any gaps.

[0009] Preferably, the slitting unit includes: a mounting frame, an air valve gauge, an air valve switch, a cutter pad roller, and a pneumatic slitting blade; one air valve gauge, one air valve switch, and one pneumatic slitting blade constitute a slitting assembly; multiple slitting assemblies are mounted on the mounting frame; each slitting assembly is connected to an air tank via an independent air pipe, and the air tank independently provides a pressurized air source to the pneumatic slitting blade; the air valve gauge is used to monitor the air pressure of the pneumatic slitting blade; the air valve switch is used to control the on / off state of the air pipe; the pneumatic slitting blade of the slitting assembly abuts against the cutter pad roller to slit the coated paper that has passed through the cutter pad roller.

[0010] Preferably, the hardness of the cutter pad roller is HRC62; the pneumatic slitting knife is implemented in the form of a circular knife, and its hardness is HRC58.

[0011] Preferably, for each slitting component, a metal wire is also fixed on the mounting frame. After being bent, the metal wire is inserted into the slit formed on the coated paper by the pneumatic slitting blade of the corresponding slitting component to eliminate static electricity on the coated paper and widen the slit.

[0012] The passive winding online slitting equipment for coated paper of this application overcomes the left and right winding sway of the winding air shaft, the left and right sway of the slitting coated paper on the first winding light roller and the second winding light roller, and the electrostatic action of the cut edges on both sides of the slit after slitting, so as to achieve the end face of the slitting coated paper roll is flush. In this way, the composite coated paper is slitting and winding online, which improves production efficiency and saves production costs. Attached Figure Description

[0013] Figure 1 A schematic diagram of the complete coated paper production machine including the passive winding online slitting equipment of this application; Figure 2 This is a schematic diagram of the passive winding type online slitting equipment for coated paper according to this application; Figure 3 To and Figure 1 A schematic diagram of the flow process of the coated paper between the rollers.

[0014] In the diagram, 1: First rubber roller; 2: First steel roller; 3, 11: Flattening rollers; 4, 6, 9, 10: Guide rollers; 5: First air-expanding shaft roller; 7: Second rubber roller; 8: Second steel roller; 12: Mounting frame; 13: Air valve gauge; 14: Air valve switch; 15: Cutter pad roller; 16: Metal wire; 17: Pneumatic slitting knife; 18: First winding smooth roller; 19: Second winding smooth roller; 20: Third winding smooth roller; 21: Cylinder; 22: Air tank; 23: Air pipe; 24: Second air-expanding shaft; 25: Casting die head. Detailed Implementation

[0015] The present application will now be described in detail with reference to the accompanying drawings.

[0016] like Figure 1 The diagram shows the structure of the entire coated paper production equipment, which includes a coated paper laminating unit and a slitting unit. The structure of the slitting unit is as follows: Figure 2 As shown.

[0017] The structure of the coated paper composite unit is the same as that of existing coated paper production machines. Figure 1 and Figure 3 The production process of coated paper is explained.

[0018] The entire coated paper production equipment includes: a first adhesive roller 1; a first steel roller 2; multiple flattening rollers 3 and 11; multiple guide rollers 4, 6, 9, and 10; a first air-expanding shaft roller 5; a second adhesive roller 7; a second steel roller 8; a mounting frame 12; an air valve gauge 13; an air valve switch 14; a cutter pad roller 15; metal wire 16; a pneumatic slitting knife 17; a first winding smoothing roller 18; a second winding smoothing roller 19; a third winding smoothing roller 20; a cylinder 21; an air tank 22; an air pipe 23; a second air-expanding shaft 24; and a casting die head 25.

[0019] In the laminating unit, the main task is to press the raw paper and the film layer together. The laminating unit includes: a first rubber roller 1; a first steel roller 2; flattening rollers 3 and 11; guide rollers 4, 6, 9 and 10; a first air-expanding shaft roller 5; a second rubber roller 7; a second steel roller 8; and a casting die 25.

[0020] The raw paper roll is mounted on the first air-expanding roller 5. As the first air-expanding roller 5 rotates, the raw paper is continuously transferred from the top of the paper roll self-unwinding roller 3 to the first steel roller 2. The tension of the first air-expanding roller 5 is controlled by a magnetic powder motor to unwind the raw paper roll.

[0021] The first rubber roller 1 and the first steel roller 2 are arranged parallel to each other and roll against each other under a certain pressure. The first rubber roller 1 is used to contact the adhesive surface, and the first steel roller 2 is used to contact the paper surface (i.e., the raw material paper). The first rubber roller 1 is cooled by water circulation to prevent the film from sticking to the roller. The first steel roller 2 is driven by a motor to rotate. The first steel roller 2 is also cooled by water circulation.

[0022] The molten film raw material flows down from the casting die head 25 and falls between the first rubber roller 1 and the first steel roller 2. Through the rolling pressure of the first rubber roller 1 and the first steel roller 2, it is laminated (or bonded) with the raw material paper, thereby forming a two-layer coated paper, one layer being paper and the other being film.

[0023] Various patterns or designs can be formed on the surface of the first steel roller 2. The casting die 25 contains molten film raw material (or PE raw material), such as polyethylene at 280°C; the film material can also be other materials.

[0024] The coated paper, formed by the pressing and bonding of the first rubber roller 1 and the first steel roller 2, is conveyed under the guide rollers 4 and 6 and then placed between the second rubber roller 7 and the second steel roller 8. The second rubber roller 7 and the second steel roller 8 are arranged parallel to each other, with the second rubber roller 7 pressing against the second steel roller 8. A cylinder is installed at each end of the second rubber roller 7, which is used to raise, lower, and press the second rubber roller 7. The second rubber roller 7 and the second steel roller 8 roll the coated paper conveyed by the guide roller 6. The second steel roller 8 is driven by a motor to rotate, achieving a traction effect.

[0025] After being rolled by the second rubber roller 7 and the second steel roller 8, the coated paper is conveyed from the lower side of the guide roller 9 and then from the upper side of the guide roller 10. Finally, it is sent to the slitting unit from the lower side of the flattening roller 11.

[0026] In the slitting unit for coated paper, the original width of coated paper is slitted into the desired width, and then wound up to obtain a roll of coated paper of the desired width. The slitting unit includes: a mounting frame 12; a valve gauge 13; a valve switch 14; a cutter pad roller 15; a metal wire 16; a pneumatic slitting blade 17; a first winding smooth roller 18; a second winding smooth roller 19; a third winding smooth roller 20; a cylinder 21; an air tank 22; an air pipe 23; and a second air expansion shaft 24.

[0027] Mounting bracket 12 is used to mount slitting components; each slitting component includes an air valve gauge 13, an air valve switch 14, and a pneumatic slitting blade 17. Multiple slitting components can be set according to the desired width of the coated paper. For example, if it is necessary to divide the original width of coated paper into four equal parts, five slitting components are required, two of which are used for edge trimming. Each slitting component is connected to an air tank 22 via an independent air pipe 23, from which the air tank provides pressurized air to the pneumatic slitting blade 17. The air valve gauge 13 is used to monitor the air pressure of the pneumatic slitting blade 17. An air valve switch 14 is used to control the on / off state of the air pipe 23. By supplying air to each slitting component independently, the air pressure of each slitting component can be precisely adjusted, ensuring that each pneumatic slitting blade achieves perfect slitting without leaving burrs. The inventors previously experimented with a scheme where all slitting components were pressurized in parallel using a single pipeline; the actual result was that some areas achieved ideal slitting, while others did not. With independent air supply through the air pipe, the air pressure required for each air pressure slitter 17 can be adjusted independently during the commissioning phase, and the commissioning of all air pressure slitter 17 can be completed quickly.

[0028] The coated paper, fed from the flattening roller 11 of the composite unit, is conveyed via the upper side of the cutter pad roller 15. The pneumatic slitting blade 17 of the slitting assembly abuts against the cutter pad roller 15, slitting the coated paper that has passed through the cutter pad roller 15. The hardness of the cutter pad roller 15 is selected as HRC62, and the pneumatic slitting blade 17 is implemented in the form of a circular blade, model MC-76 / 17, with a hardness of HRC58. This hardness matching ensures that the circular blade will not cut the pad roller, nor will the circular blade be damaged by the pad roller, and the slit produced by the cut is flat and not prone to burrs. Corresponding to each slitting assembly, a metal wire 16 is also fixed on the mounting frame 12. This metal wire 16 is bent and inserted into the slit formed on the coated paper by the pneumatic slitting blade 17 of the corresponding slitting assembly. The metal wire 16 has two functions: first, it widens the slit width, increasing the distance between the coated paper on both sides of the slit; second, it eliminates static electricity. The coated paper produced by the roll forming process in the composite unit carries a large amount of static electricity. This static electricity causes the cut edges to adhere together when the air pressure slitting knife 17 cuts the coated paper, which is an important reason why the end faces of adjacent slit rolls interlock when the coated paper rolls are wound up in the subsequent process.

[0029] The first winding roller 18, the second winding roller 19, and the third winding roller 20 are arranged parallel to each other between the mounting walls 26 on their left and right sides, with a predetermined interval between them. The first winding roller 18, the second winding roller 19, and the third winding roller 20 rotate synchronously driven by a motor. For example, the motor drives the third winding roller 20, which in turn drives the second winding roller 19 via a transmission means (such as a chain). The second winding roller 19 then drives the first winding roller 18 via a transmission means (such as a chain), thereby achieving synchronous rotation of the first winding roller 18, the second winding roller 19, and the third winding roller 20. After the slit coated paper is transferred between the first winding roller 18, the second winding roller 19, and the second air shaft 24, the second air shaft 24 rotates as the first winding roller 18 and the second winding roller 19 rotate, and the slit coated paper is then wound onto the second air shaft 24.

[0030] The second air shaft 24 is positioned above the gap between the first take-up smooth roller 18 and the second take-up smooth roller 19, and is parallel to the first take-up smooth roller 18 and the second take-up smooth roller 19. The second air shaft 24 is a take-up tool, and bearings are provided at both ends of the second air shaft 24. The two ends of the second air shaft 24 are pressed by cylinders 21 at a pressure of 0.15-0.7 MPa, thereby pressing the second air shaft 24 onto the first take-up smooth roller 18 and the second take-up smooth roller 19. The cylinders 21 are fixedly mounted on corresponding mounting walls 26. Corresponding to each end of the second air shaft 24, a slide is formed on the mounting walls 26 on both sides, and a slider is installed in the slide. The slider is installed at the output end of the corresponding cylinder 21. Each slider has an arc-shaped notch on its lower side, which corresponds to the bearings at both ends of the second air shaft 24. This ensures the pressing pressure at both ends of the second air shaft 24 while preventing it from swaying left and right, thus preventing the end face of the coated paper roll from being uneven after being wound onto the second air shaft 24. Furthermore, the surfaces of the first winding roller 18 and the second winding roller 19 are treated to increase friction. Specifically, masking tape is wound around both the first and second winding rollers 18 and 19. The masking tape has raised points on its surface to increase the coefficient of friction. The masking tape on the first winding roller 18 is wound in segments, with a gap of about 2-3 mm between each segment; the entire surface of the second winding roller 19 is wrapped with masking tape without any gaps.

[0031] Regarding the wrapping of masking tape around the first winding roller 18 and the second winding roller 19, the inventors conducted various experiments. The first experiment involved keeping the first and second winding rollers 18 and 19 as smooth rollers without any adhesive layer on their surfaces. The result was uneven end faces of the slit coated paper rolls, and some adjacent rolls interlocking at the end faces. The second experiment involved attaching a full-width adhesive film to the surfaces of the first and second winding rollers 18 and 19, with similar results to the first experiment. The third experiment involved attaching a full-width masking tape to the surfaces of the first and second winding rollers 18 and 19, with similar results to the first experiment. The fourth experiment, as mentioned above, involved attaching masking tape to the first winding roller 18 in segments at predetermined intervals, and then attaching a full-width masking tape to the surface of the second winding roller 19. The result was that the end faces of each slit coated paper roll were flush, and there was no interlocking of adjacent rolls.

[0032] The slit coated paper is conveyed to the upper side of the first winding roller 18 and the second winding roller 19, and then wound up by the second air shaft 24. The second air shaft 24 is pre-installed with multiple paper tubes, each corresponding to one slit coated paper roll. A 5mm gap is maintained between adjacent paper tubes during installation. In this way, the slit coated paper is directly wound onto the corresponding paper tube.

[0033] The function of the third winding roller 20 is to ensure that the machine does not stop to switch the second air shaft 24 after the first roll of coated paper is cut. When the cut coated paper roll reaches the set length, the cylinder 21 pressing on the second air shaft 24 is raised first. Two workers simultaneously move the product onto the second winding roller 19 and the third winding roller 20. Then, another second air shaft 24 with the paper tube pre-loaded is placed in the middle position between the first winding roller 18 and the second winding roller 19. The cylinder 21 is pressed onto the newly replaced second air shaft 24. The operating platform is pushed under the third winding roller 20. The product is moved directly onto the platform. The cut coated paper is cut with a knife. The cut coated paper is wound onto the replaced second air shaft 24 to complete the winding and unwinding work.

Claims

1. A passive winding type online slitting device for coated paper, comprising a composite unit, wherein molten film material and raw paper are rolled together in the composite unit to laminate the film onto the surface of the raw paper, forming coated paper; characterized in that, The passive winding online slitting equipment for coated paper also includes a slitting unit, which is used to slit the coated paper produced by the composite unit into coated paper of a predetermined width and passively wind it up on the second air shaft to form multiple slit coated paper rolls with flush ends.

2. The passive winding type online slitting equipment for coated paper according to claim 1, characterized in that: The slitting unit includes a first take-up optical roller and a second take-up optical roller; the first take-up optical roller and the second take-up optical roller are arranged parallel to each other between the mounting walls on their left and right sides, and there is a predetermined interval between them; the first take-up optical roller and the second take-up optical roller rotate synchronously by a motor drive; The second air shaft is positioned above the gap between the first and second take-up rollers and is parallel to the first and second take-up rollers. The slit coated paper is conveyed between the first winding roller, the second winding roller, and the second air shaft, and wound onto the second air shaft. The second air shaft rotates as the first winding roller and the second winding roller rotate, thereby realizing the winding of the slit coated paper on the second air shaft.

3. The passive winding type online slitting equipment for coated paper according to claim 1, characterized in that: Bearings are provided at both ends of the second air shaft; the two ends of the second air shaft are pressed by cylinders, thereby pressing the second air shaft onto the first winding light roller and the second winding light roller.

4. The passive winding type online slitting equipment for coated paper according to claim 3, characterized in that: The cylinder is fixed on the corresponding mounting wall; corresponding to each end of the second air shaft, a slide is formed on the mounting wall, and a slider is installed in the slide. The slider is installed at the output end of the corresponding cylinder; an arc-shaped notch is formed on the lower side of each slider, which is pressed onto the bearings at both ends of the second air shaft through the arc-shaped notch, ensuring the pressing force at both ends of the second air shaft while preventing the second air shaft from swinging left and right.

5. The passive winding type online slitting equipment for coated paper according to claim 1, characterized in that: Masking tape is wound onto the first and second winding rollers respectively. The masking tape has raised dots on its surface to increase the coefficient of friction. The masking tape on the first winding roller is wound in segments, with a 2-3mm gap between each segment. The surface of the second winding roller is completely wrapped with masking tape without any gaps.

6. The passive winding type online slitting equipment for coated paper according to claim 1, characterized in that: The slitting unit includes: a mounting frame, an air valve gauge, an air valve switch, a cutter pad roller, and a pneumatic slitting blade; one air valve gauge, one air valve switch, and one pneumatic slitting blade constitute a slitting assembly; multiple slitting assemblies are mounted on the mounting frame; each slitting assembly is connected to an air tank via an independent air pipe, from which the air tank independently provides a pressurized air source to the pneumatic slitting blade; the air valve gauge is used to monitor the air pressure of the pneumatic slitting blade; the air valve switch is used to control the on / off state of the air pipe; the pneumatic slitting blade of the slitting assembly abuts against the cutter pad roller to slit the coated paper that has passed through the cutter pad roller.

7. The passive winding type online slitting device for coated paper according to claim 6, characterized in that: The hardness of the cutter pad roller is HRC62; the pneumatic slitting knife is implemented in the form of a circular knife, and its hardness is HRC58.

8. The passive winding type online slitting device for coated paper according to claim 6, characterized in that: For each slitting component, a metal wire is also fixed on the mounting bracket. After being bent, the metal wire is inserted into the slit formed on the coated paper by the pneumatic slitting blade of the corresponding slitting component to eliminate static electricity on the coated paper and widen the slit.

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