Creasing machine

Abstract

To provide a wrinkle processing machine capable of stably forming wrinkles on a sheet material.SOLUTION: A creasing machine according to the present embodiment is a creasing machine that performs creasing on a long sheet material, and includes a processing roll having a roll surface that is coated by thermal spraying and has fine irregularities, a heating mechanism that heats a temperature of the roll surface of the processing roll to a temperature at which the sheet material is softened, and a pressing blade that presses a sheet surface of the sheet material against the roll surface of the processing roll. The pressing blade presses the sheet material in a dry state against the processing roll, and the processing roll feeds the sheet material pressed by the pressing blade while heating the sheet material.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a creasing machine. [Background technology]

[0002] For example, Patent Document 1 discloses an apparatus including: (4) means for pressing the web against a driven gripping surface in a drive region, thereby driving the web forward in the longitudinal direction; and deceleration means for decelerating the web in a deceleration region, impeding the advance of the driven untreated material by the previously compressed material, and compressing the untreated material in the longitudinal direction against it; wherein the deceleration means comprises a sheet member constituting a deceleration member having a working surface arranged to contact the surface of the web, and the working surface is formed by a number of spaced apart sheets arranged across the web portion to be decelerated. An ultra-fine wrinkle forming device is disclosed, which has deceleration protrusions, the protrusions being arranged at an acute angle to the longitudinal surface direction and having tip portions (EL) configured to apply a resistance force (FR) to a corresponding portion of the web that has arrived at the position of the protrusions, the resistance force of the protrusions being composed of a deceleration component force that slows down the approaching corresponding portion of the web so as to oppose the forward motion of the web, and a deflection component force that temporarily deflects the movement path of the corresponding portion of the web, and the multiple deceleration protrusions as a whole are configured to apply a significant deceleration effect to the web that they contact. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 03-075662 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a creasing machine that can stably form creasing in sheet material. [Means for solving the problem]

[0005] The wrinkle processing system of the present invention comprises a wrinkle processing machine that applies wrinkles to long sheet material, a winding machine that winds up the sheet material that has been wrinkled by the wrinkle processing machine, and a support means between the wrinkle processing machine and the winding machine that supports the sheet material sent out from the wrinkle processing machine from below while cooling it.

[0006] Preferably, the support means is a support machine having a top surface made of a material with a higher thermal conductivity than the sheet material, and the winding machine winds up the sheet material at a speed corresponding to the feed speed of the crimping machine.

[0007] Preferably, the winding speed of the winder is set to a value that allows the sheet material to sag due to gravity between the crimping machine and the winder.

[0008] Preferably, the crimping machine performs crimping while heating the sheet material with an electric heater or a steam heater, and the support machine has a rotating roll that rotates in response to the sheet material, and supports the sheet material with the outer surface of this rotating roll.

[0009] Preferably, the crimping machine is configured to be able to set the feed speed of the crimped sheet material, and the winding machine is set to a winding speed slower than the feed speed depending on the feed speed set in the crimping machine.

[0010] In addition, the wrinkle processing method of the present invention includes a step of wrinkle processing a long sheet material, a step of cooling the wrinkled sheet material while supporting it from below, and a step of winding up the cooled sheet material.

[0011] In addition, the crimping machine of the present invention is a crimping machine that applies crimping to long sheet material, and includes a processing roll having a roll surface with fine irregularities coated by thermal spraying, a heating mechanism that heats the roll surface of the processing roll to a temperature at which the sheet material softens, and a pressure blade that presses the sheet surface of the sheet material against the roll surface of the processing roll, wherein the pressure blade presses the dry sheet material against the processing roll, and the processing roll feeds out the sheet material pressed by the pressure blade while heating it.

[0012] Preferably, the heating mechanism is an oil heater, an electric heater, or a steam heater.

[0013] Preferably, the pressure blade presses the sheet material against the roll surface of the processing roll, forming a gap between the pressure blade and the processing roll that is large enough to cause the sheet material to converge in the longitudinal direction. [Effects of the Invention]

[0014] According to the present invention, wrinkles can be stably formed in the sheet material. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a diagram illustrating a wrinkle processing system 1 according to an embodiment of the present invention. [Figure 2] 2 is a diagram illustrating the configuration of the wrinkle processing system 1 in more detail. FIG. [Figure 3] 10 is a flowchart illustrating a wrinkle processing method (S10). DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the scope of the present invention is not limited to the illustrated examples. First, the configuration of a crimping system 1 according to the embodiment will be described. FIG. 1 is a diagram illustrating a wrinkle processing system 1 according to the present embodiment. FIG. 2 is a diagram illustrating the configuration of the crimping system 1 in more detail. As illustrated in Figures 1 and 2, the creasing system 1 is a system that dry-wrinkles a long sheet material 5. Examples of the sheet material 5 include fiber sheets such as paper, web-like sheets, nonwoven fabrics, resin films, and films with a metal film or metal foil formed on the surface of a substrate by vapor deposition. The sheet material 5 in this example is a high-density polyethylene fiber nonwoven fabric with a layered structure including a nonwoven fabric layer and a porous resin film layer, and is a so-called moisture-permeable waterproof sheet. The moisture-permeable waterproof sheet in this example is a stretchable waterproof sheet for residential use. The crimping system 1 includes a payout machine 10, a crimping machine 20, a winding machine 30, a support machine 40, and a guide roll 50. The payout machine 10, guide roll 50A, crimping machine 20, support machine 40, guide roll 50B, and winding machine 30 are arranged in this order from the upstream side in the conveying direction of the sheet material 5.

[0017] The unwinding machine 10 is a device that feeds the sheet material 5, which is unwound from a roll (supply roll 6) around which the long sheet material 5 is wound, to the crimping machine 20. The unwinding machine 10 includes a unwinding roll 100. The unwinding roll 100 is a roll that is driven by transmitted power. The unwinding roll 100 rotates with the supply roll 6 disposed thereon, and feeds the sheet material 5, which is unwound from the supply roll 6, to the crimping machine 20. The rotation speed of the unwinding roll 100 can be set as appropriate.

[0018] The crimping machine 20 is a device that crimps the long sheet material 5. The crimping machine 20 includes a processing roll 200, a pressure blade 202, and a doctor blade 210. The processing roll 200 is a roll driven by power transmitted from a predetermined power source. The processing roll 200 of this example uses a chain drive transmission system, making it less susceptible to damage even when exposed to high temperatures. The roll surface of the processing roll 200 is coated with a high-friction coating by thermal spraying, creating a finely textured surface. The finely textured roll surface of the processing roll 200 prevents slippage of the sheet material 5 fed from the unwinder 10. The processing roll 200 also includes a heating mechanism (not shown) that can heat the roll surface to a temperature at which the sheet material 5 softens. The heating mechanism can use a heating method such as an oil heater, an electric heater, or a steam heater. The processing roll 200 of this example uses an oil heater. When selecting a heating method, considering the crimping process, a steam heater can be selected. Because steam is routinely used in paper mills, reusing the steam can reduce production costs. Furthermore, when an electric heater is selected, it is possible to heat at a higher temperature than with an oil heater. Furthermore, if the processing roll 200 is an oil heater, the temperature of the roll surface can be raised to about 300°C, but considering the softening temperature of the breathable waterproof sheet material (about 120°C), it is preferable that the temperature of the roll surface be between 80°C and 110°C. The crimping machine 20 can also set the feed speed of the crimped sheet material 5. In other words, the crimping machine 20 can set the rotation speed of the processing roll 200. The rotation speed of the processing roll 200 is set to a rotation speed higher than the rotation speed of the winding drive roll 300, depending on the set rotation speed of the winding drive roll 300. The processing roll 200 also starts and stops rotating at the same timing as the winding drive roll 300.

[0019] The pressing blade 202 is a blade that presses the sheet surface of the sheet material 5 fed from the unwinder 10 against the roll surface of the processing roll 200. The pressing blade 202 includes a base 203 connected to an air cylinder and a leaf spring 204 supported by the base 203. The pressing blade 202 presses the sheet surface of the sheet material 5 against the roll surface of the processing roll 200, thereby working together with the processing roll 200 to form a gap large enough to cause the sheet material 5 to converge in the longitudinal direction. The gap large enough to cause the sheet material 5 to converge is a gap large enough that the sheet material 5 cannot pass through without plastically deforming, in other words, a gap large enough that the sheet material 5 can only pass through while undergoing plastic deformation. The doctor blade 210 is a support member that supports the lower side of the sheet material 5 that passes through the gap formed by the pressing blade 202 and the processing roll 200. It is located downstream of the pressing blade 202 and is disposed near the surface of the processing roll 200.

[0020] The winding machine 30 is a device that winds up the sheet material 5 that has been wrinkled by the crimping machine 20. The winding machine 30 evenly winds up the sheet material 5 while applying tension to the sheet material 5 that does not crush the wrinkles that have been applied and does not allow the wrinkles to return to their original shape. The winding machine 30 includes a winding drive roll 300 and a winding roll 302. The winding drive roll 300 is a roll driven by power transmitted from a predetermined power source. The roll surface of the winding drive roll 300 is thermally sprayed to prevent slippage of the sheet material 5 sent from the crimping machine 20. The winding drive roll 300 may also be provided with a cooling mechanism for cooling the roll surface. The cooling method for the roll surface of the winding drive roll 300 may, for example, be to provide a water reservoir inside the winding drive roll 300 to store water, or to provide a flow path and circulate water through the flow path. Alternatively, a cooling method may be used in which air is circulated through the flow path. Alternatively, the sheet material 5 may be directly cooled using cooling air. In this way, when winding the sheet material 5 after crimping, the sheet material 5, which is in a high-temperature state, can be cooled to shrink its thermally expanded state and stabilize the wrinkles before winding. Furthermore, the winding machine 30 is set to a winding speed slower than the feed speed set in the crimping machine 20. In other words, the rotation speed of the winding drive roll 300 is slower than the rotation speed of the processing roll 200, and the winding drive roll 300 causes the winding roll 302 to wind the sheet material 5. The winding speed of the winding machine 30, i.e., the rotation speed of the winding drive roll 300, is set to a value that allows the sheet material 5 to sag due to gravity between the crimping machine 20 and the winding machine 30. The winding drive roll 300 can rotate in the normal or reverse direction, and the rotation direction can be changed as needed. The winding drive roll 300 uses either the normal or reverse rotation to wind the sheet material 5 onto the winding roll 302, depending on whether the sheet material 5 after crimping is wound with the front side pressed by the pressing blade 202 facing inward, or the back side of the sheet material 5 that comes into contact with the roll surface of the processing roll 200 facing inward.

[0021] The winding roll 302 is located downstream of the winding drive roll 300 in the conveying direction of the sheet material 5, and is a rotating roll that rotates as the sheet material 5 is conveyed. The winding roll 302 is pressed against the winding drive roll 300 while being pulled toward the winding drive roll 300 by an air cylinder 304. At this time, the winding roll 302 is pressed against the winding drive roll 300 with a pressure that does not crush wrinkles in the sheet material 5. Note that if winding is performed with the pressure of the winding roll 302 against the winding drive roll 300 minimized, the gripping force of the winding drive roll 300 will decrease; however, the roll surface of the winding drive roll 300 is thermally sprayed to prevent a decrease in gripping force.

[0022] Support machine 40 is an example of the supporting means according to the present invention, and is a device that supports sheet material 5 delivered from crimping machine 10 from below while cooling it, between crimping machine 10 and winding machine 30. Support machine 40 includes support material 400 and support roll 402. Note that the supporting means is not limited to support material 400 of support machine 40, which will be described later, as long as it supports sheet material 5 from below while cooling it. For example, sheet material 5 may be supported while being cooled by blowing air from below, or may be supported while being cooled by a roll. The support material 400 supports the sheet material 5 from below while it is being transported between the crimping machine 20 and the winding machine 30, as it sags due to gravity. The support material 400 has a top surface (top surface 400A) made of a material with higher thermal conductivity than the sheet material 5. In this example, the support material 400 is formed of a material with higher thermal conductivity than the sheet material 5. The support material 400 is, for example, a stainless steel, aluminum steel, or copper steel plate, and the top surface 400A, which is the plate surface, is also made of a material with higher thermal conductivity than the sheet material 5 and has a smooth surface shape. While the support material 400 in this example is a single plate, this is not limiting and the support material 400 may have a double structure with cooling water passing through it. In addition, the support material 400 is smoothly bent at the end located in the transport direction of the sheet material 5. This prevents damage to the sheet material 5 during transport. The support material 400 is also positioned so that the lower surface (back surface) of the sheet surface of the conveyed sheet material 5 faces the top surface 400A of the support material 400 and the lower surface of the sheet material 5 and the top surface 400A are in contact with each other. Furthermore, the support material 400 is arranged to be rotatable about a predetermined rotation axis. For example, the support material 400 rotates about a rotation axis located near the downstream end in the conveyance direction. The support material 400 rotates within a range from a position (position indicated by a solid line) where the top surface 400A supports the back surface of the sheet material 5 from below to a position (position indicated by a dashed line) where the top surface 400A is separated from the back surface of the sheet material 5 and faces the top surface 400A in the conveyance direction of the sheet material 5. When cooling of the sheet material 5 is required during crimping, the support material 400 is arranged at the position indicated by the solid line. When the sheet material 5 is not being crimped, and an operator is performing a predetermined task, such as preparation for processing, or maintenance within the apparatus, or when cooling of the sheet material 5 is not required during crimping, the support material 400 is arranged at the position indicated by the dashed line. In this example, since the sheet material 5 needs to be cooled during the crimping process, the support material 400 is placed at the position indicated by the solid line.

[0023] The support roll 402 is a rotating roll that rotates in response to the sheet material 5. The support roll 402 is adjacent to the support material 400, located downstream of the support material 400 in the conveying direction of the sheet material 5, and rotates as the sheet material 5 is conveyed. The support roll 402 supports the sheet material 5 with its outer circumferential surface, i.e., its roll surface. The roll surface of the support roll 402 is highly friction coated by thermal spraying, creating a finely uneven surface. The finely uneven roll surface of the support roll 402 prevents the fed sheet material 5 from slipping. The roll surface of the support roll 402 has the same surface roughness as the roll surface of the winding drive roll 300, and maintains the tension of the sheet material 5 in the section from the support roll 402 to the winding drive roll 300. The supporting roll 402 may also employ a cooling mechanism for cooling the roll surface, for example, a water reservoir may be provided inside the roll to store water, or a flow path may be provided to circulate water within the flow path. Alternatively, cooling air may be used to flow through the flow path for cooling.

[0024] The guide rolls 50 are rotating rolls that rotate due to the conveyance of the sheet material 5. The guide rolls 50 include a guide roll 50A and a guide roll 50B. Note that the guide rolls 50A and 50B have substantially the same configuration, and are simply referred to as the guide rolls 50 unless there is a particular need to distinguish between them. The guide roll 50A is located between the unwinding machine 10 and the crimping machine 20, and guides the sheet material 5 being conveyed from the supply roll of the unwinding machine 10 towards the processing roll 200 of the crimping machine 20. The guide roll 50B is located between the support machine 40 and the winding machine 30, and guides the sheet material 5 being conveyed from the support roll 402 of the support machine 40 towards the winding drive roll 300 of the winding machine 30. The guide rolls 50 are set to have a surface roughness and a surface roughness and are arranged at a position that will prevent the sheet material 5 from being wrinkled or sagged during transport. In this way, the wrinkle processing system 1 of this example can obtain a sheet material 5 that has been well wrinkled by the cooperation of the unwinding machine 10, the wrinkle processing machine 20, the winding machine 30, the support machine 40, and the guide roll 50.

[0025] Next, a creasing method according to the embodiment will be described. FIG. 3 is a flowchart illustrating the crimping method (S10). The crimping system simultaneously and in parallel performs the feeding of the sheet material 5 by the unwinding machine 10, the crimping of the sheet material 5 by the crimping machine 20, and the winding of the sheet material 5 by the winding machine 30. Therefore, for the sake of convenience in explaining this method, the explanation will be given from the upstream side to the downstream side in the conveying direction. As illustrated in FIG. 3, in step 100 (S100), the unwinding machine 10 rotates the unwinding roll 100 to pull out the sheet material 5 from the supply roll 6, and passes the sheet material 5 through the guide roll 50A to the crimping machine 20.

[0026] In step 102 (S102), the crimping machine 20 crimps the sheet material 5 delivered from the delivery machine 10. Specifically, the pressing blade 202 presses the front surface of the conveyed sheet material 5 against the roll surface of the processing roll 200 using the leaf spring 204. The back surface of the pressed sheet material 5 is pressed against the roll surface of the processing roll 200. The back surface of the sheet material 5 has a higher friction resistance than the front surface, preventing slippage between the processing roll 200 and the sheet material 5 during crimping. The temperature of the roll surface of the processing roll 200 is the softening temperature of the sheet material 5 (110°C in the case of a moisture-permeable waterproof sheet), and the pressed sheet material 5 is delivered while being heated. At this time, the sheet material 5 is forcibly delivered through the gap between the pressing blade 202 and the roll surface of the processing roll 200, causing it to plastically deform and contract, forming wrinkles. For example, the sheet material 5 is wrinkled so that a length of 100 mm in the longitudinal direction becomes 38 mm or more and 45 mm or less. The size of the wrinkles formed on the sheet material 5 can be changed as needed. Therefore, the crimping machine 20 forms wrinkles on the sheet material 5 that is softened while being fed out, and feeds the wrinkled sheet material 5 to the supporting machine 40.

[0027] In step 104 (S104), the support machine 40 cools the wrinkled sheet material 5 while supporting it from below. Specifically, the support plate 400 supports the lower surface of the sheet surface of the wrinkled sheet material 5 by contacting it with the top surface 400A of the support plate 400, thereby supporting the sheet material 5 so that the wrinkles applied thereto do not stretch due to the weight of the sheet 5. Furthermore, the support plate 400 comes into contact with the sheet material 5 and cools the heat applied by the processing roll 200, thereby contracting the thermally expanded state and stabilizing the wrinkles applied to the sheet material 5.

[0028] In step 106 (S106), the winding machine 30 winds up the cooled sheet material 5. Specifically, the winding drive roll 300 rotates at a rotational speed slower than the rotational speed of the processing roll 200, causing the winding roll 302 to wind up the sheet material 5. The winding roll 302 winds up the sheet material 5 while being pressed against the winding drive roll 300 with a pressing force that does not crush the wrinkles in the sheet material 5. By being pressed against the winding drive roll 300 with the pressing force kept to an absolute minimum, the winding roll 302 can efficiently wind up elastic sheet material such as a moisture-permeable waterproof sheet.

[0029] As described above, according to the crimping system 1 of this embodiment, the sheet material 5 that has been wrinkled in a heated state is supported from below by the support plate 400 while being cooled, and the cooling stabilizes the wrinkles in the sheet material 5, allowing the sheet material 5 to be wound up without crushing the wrinkles. Furthermore, by supporting the sheet material 5 from below, the sheet material 5 can be transported without the wrinkles being stretched out by its own weight. Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and additions can be made without departing from the spirit of the invention.

[0030] Next, a modified example of the above embodiment will be described. In the modified example, elements having substantially the same functions and configurations as those in the above embodiment will be assigned the same reference numerals and will not be described again. [Variations] In the above embodiment, the support roll 402 had an outer diameter of 15 cm, and the guide roll 50B had an outer diameter of 10 cm, which were standard sizes. However, this is not limited to this. For example, if a flow path for circulating cooling water is provided inside the roll, the support roll 402 and the guide roll 50B may have an outer diameter of 30 cm to 60 cm, specifically, 50 cm. This increases the contact area of ​​the roll surfaces, and by flowing cooling water through the provided flow path, the sheet material 5 can be cooled more efficiently. In this way, the heat of the sheet material 5 immediately after creasing can be efficiently cooled, and the creasing can be stabilized before winding. [Explanation of symbols]

[0031] 1. Wrinkle processing system 5 Sheet material 10. Unwinder 20 Wrinkle processing machine 200 Processing roll 202 Pressing Blade 210 Doctor Blade 30 Winding machine 300 Winding drive roll 302 Winding roll 40 Support machine 400 Support material 402 Support roll 50 Guide Roll

Claims

1. A creasing machine that creasing a long sheet material, a processing roll having a roll surface with fine irregularities that is coated by thermal spraying; a heating mechanism that heats the roll surface of the processing roll to a temperature at which the sheet material softens; a pressing blade that presses the sheet surface of the sheet material against the roll surface of the processing roll; and the pressing blade presses the dry sheet material against the processing roll; The processing roll heats and feeds the sheet material pressed by the pressing blade. Wrinkle processing machine.

2. The heating mechanism is an oil heater, an electric heater, or a steam heater. The crimping machine according to claim 1.

3. The pressure blade presses the sheet material against the roll surface of the processing roll, thereby forming a gap between the pressure blade and the processing roll that is large enough to cause the sheet material to converge in the longitudinal direction. The crimping machine according to claim 1.

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