Apparatus and method for manufacturing a can

Abstract

The present application provides a manufacturing device and a manufacturing method of a can. The manufacturing device of the can includes: a bobbin that supplies a fiber to be wound around a rotating inner container, the inner container having a cylindrical portion and a dome portion having a substantially semispherical shape provided at both ends of the cylindrical portion; a fiber supply device that moves to and fro along a rotation axis direction of the inner container to supply the fiber to the inner container; a first accumulator roller configured to be movable in a rotation axis direction; a speed control portion that controls a supply speed as a speed at which the fiber is supplied from the bobbin; a calculation portion that calculates an estimated supply speed as the supply speed estimated based on a winding position of the fiber in the dome portion calculated based on a position of the fiber supply device in the rotation axis direction of the inner container and a radius of the dome portion; and a first acquisition portion that acquires first tension information related to a tension of the fiber in the first accumulator roller, the speed control portion controlling the supply speed based on the estimated supply speed and the first tension information.

Description

Technical Field

[0001] This disclosure relates to an apparatus and method for manufacturing tanks. Background Technology

[0002] One method for manufacturing a can is to wind fibers around the outer edge of the can. For example, Patent Document 1 describes a technique that winds fibers around a can while adjusting the fiber tension by moving the rotation axis of a yarn reservoir roller positioned between the spool supplying the fiber and the can. This suppresses fiber tension variations and reduces winding deviations of the fiber relative to the can.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-196817 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] The speed at which fibers are fed from the spool is controlled via feedback control, based on the measured tension at the actual speed. Therefore, if the difference between the desired and actual speed varies significantly over a short period, the control of the fiber feed speed from the spool may be delayed. Consequently, it is difficult to increase the feed rate and accelerate can manufacturing.

[0008] Means for solving technical problems

[0009] This disclosure was made to solve the above-mentioned problems and can be implemented in the following ways.

[0010] (1) According to one aspect of the present disclosure, a can manufacturing apparatus is provided. This manufacturing apparatus comprises: a spool for supplying fibers wound onto a rotating inner liner, the inner liner having a cylindrical portion and generally hemispherical domes at both ends of the cylindrical portion; a fiber feeder located in a fiber supply path between the spool and the inner liner, which reciprocates along the rotation axis of the inner liner to supply the fibers to the inner liner; a first thread reservoir roller located in the fiber supply path between the spool and the fiber feeder, configured such that its rotation axis is movable; a second thread reservoir roller located in the fiber supply path between the first thread reservoir roller and the fiber feeder, configured such that its rotation axis is movable; and a first adjustment unit for rotating the rotation axis of the first thread reservoir roller. The system includes: a second adjustment unit that adjusts the tension of the fiber by rotating the rotation axis of the second yarn feeder roller; a speed control unit that rotates the spool to control the supply speed, which is the speed at which the fiber is supplied from the spool; a calculation unit that calculates the estimated supply speed based on the winding position of the fiber in the dome, calculated using the position of the fiber feeder in the rotation axis direction of the inner liner and the radius of the dome; a first acquisition unit that acquires first tension information related to the tension of the fiber in the first yarn feeder roller; and a second acquisition unit that acquires second tension information related to the tension of the fiber in the second yarn feeder roller. The speed control unit controls the supply speed based on the estimated supply speed, the first tension information, and the second tension information.

[0011] According to the manufacturing apparatus of this method, the calculation unit pre-calculates the estimated supply speed based on the position of the fiber feeder in the rotational axis direction of the inner liner and the radius of the dome, thus calculating the winding position of the fiber in the dome. Therefore, compared with the case where control is based on tension information without pre-calculating the estimated supply speed, the response delay of the supply speed can be reduced. As a result, the supply speed can be increased, thereby enabling high-speed manufacturing of the can.

[0012] (2) In the manufacturing apparatus described above, the calculation unit may calculate the winding position of the fiber in the dome using the following mathematical formula (1) and calculate the estimated supply speed using the following mathematical formula (2).

[0013]

Mathematical Formula (1)

[0014]

[0015] r is the winding position of the fiber in the dome.

[0016] r0 is the radius of the top of the circle.

[0017] x is the position of the fiber feeder in the direction of the rotation axis of the inner liner.

[0018] a is the length from the center of the cylindrical portion in the direction of the rotation axis of the inner liner.

[0019]

Mathematical Expression (2)

[0020]

[0021] N is the number of revolutions per unit time of the inner liner.

[0022] l is the length of the fiber path from the spool to the inner liner.

[0023] L is the length of the path of the fiber from the spool to the fiber feeder.

[0024] y is the distance from the fiber feeder to the inner liner in the fiber delivery direction.

[0025] According to this scheme, the estimated supply rate can be calculated with high precision because the winding position of the fibers in the dome can be calculated with high precision.

[0026] (3) In the manufacturing apparatus described above, the calculation unit may correct the estimated supply speed based on the moving speed of the first wire storage roller.

[0027] According to this scheme, the estimated supply rate can be calculated with higher accuracy.

[0028] (4) In the manufacturing apparatus described above, the control unit may read the first action data from a storage medium that records the first action data, and use the first action data to control the rotation of the inner liner and the reciprocating movement of the fiber supply. The first action data is the timing action data of the rotation of the inner liner and the reciprocating movement of the fiber supply.

[0029] This approach allows for faster operation of the inner liner and fiber feeder compared to real-time motion data processing. Furthermore, it enables the manufacture of multiple cans using the same initial motion data, making it easier to trace the root cause in case of quality defects.

[0030] (5) In the manufacturing apparatus described above, the manufacturing apparatus may further include an active yarn storage device, which is located in the fiber supply path between the first yarn storage roller and the fiber feeder. The length of the fiber supply path is changed. The control unit reads the second action data from a storage medium that records the second action data and uses the second action data to control the active yarn storage device. The second action data is the timing action data of the active yarn storage device determined based on the estimated supply speed.

[0031] The second set of action data is determined based on the estimated supply rate. Therefore, according to this scheme, the process of determining the action data of the active storage device timing at the same time as the actual manufacturing of the tank can be omitted.

[0032] (6) In the manufacturing apparatus described above, the manufacturing apparatus may include: a second yarn feeder roller, a fiber supply path located between the first yarn feeder roller and the fiber feeder, configured such that a rotating shaft is movable; a second adjustment unit, which adjusts the tension of the fiber by rotating the rotating shaft of the second yarn feeder roller; a tension zoning unit, which divides the tension range of the fiber into a first tension range where the first yarn feeder roller is located and a second tension range where the second yarn feeder roller is located; and a second acquisition unit, which acquires second tension information related to the tension of the fiber in the second yarn feeder roller, and the speed control unit controls the supply speed based on the estimated supply speed, the first tension information and the second tension information.

[0033] The speed control unit uses tension information in each tension range to control the supply speed, thus enabling high-precision control of the supply speed.

[0034] It should be noted that this disclosure can be implemented in a variety of ways, such as by a can manufacturing system, a method for controlling the speed of fiber supply from a spool, etc. Attached Figure Description

[0035] Figure 1 This is an explanatory diagram showing an example of a can manufacturing apparatus.

[0036] Figure 2 This is a diagram showing the state of the fiber bundle being wound into the inner liner via the fiber feeder.

[0037] Figure 3 This is a flowchart illustrating an example of supply speed control processing.

[0038] Figure 4 This is a flowchart illustrating an example of the first data generation process.

[0039] Figure 5This is a flowchart illustrating an example of fiber feeder / tank control processing.

[0040] Figure 6 This is a flowchart illustrating an example of the second data generation process.

[0041] Figure 7 This is a flowchart illustrating an example of active wire feeder control processing. Detailed Implementation

[0042] A. First implementation method:

[0043] Figure 1 This is an explanatory diagram showing an example of a can manufacturing apparatus 100 according to this embodiment. The manufacturing apparatus 100 includes a fiber winding section 20, a tension zone section 30, a fiber guiding section 40, and a control section 50. The fiber winding section 20 is a first tension zone, and the fiber guiding section 40 is a second tension zone. The manufacturing apparatus 100 applies tension to a bundle of resin-impregnated carbon fibers (hereinafter referred to as "fiber bundle T") and winds it into an inner liner 200 by combining circumferential winding and helical winding. As a result, a reinforcing layer of carbon fibers is formed on the outer periphery of the inner liner 200, thus manufacturing a can. The manufacturing apparatus 100 can also be referred to as a winding device.

[0044] The inner liner 200 is formed of a resin, such as polyethylene, nylon, polypropylene, or polyester, which has gas barrier properties against hydrogen. It should be noted that in this embodiment, the inner liner 200 is made of resin, but it could also be made of metal.

[0045] Fiber bundle T is a so-called prepreg in which carbon fiber bundles are impregnated with a thermosetting epoxy resin. It should be noted that, for example, such a prepreg can be a flat sheet with a thickness of about 200 μm and a width of about 4 mm to 5 mm, formed by twisting and concentrating about 24,000 filaments made from polyacrylonitrile filaments fired at about 3000°C, and lightly bonding them together with an adhesive resin.

[0046] The fiber winding section 20 is a mechanism for winding out the fiber bundle T, including a spool 21, multiple conveying rollers 22, 24-26, 28, a first yarn storage roller 23, a moving roller 27, an active yarn storage device 29, and a measuring section C1. The spool 21 is a cylindrical component with the fiber bundle T wound around it, and it is a component that supplies the fiber bundle T by rotating it using an electric motor. The section from the spool 21 to the inner tube 200 is also referred to as the fiber supply path.

[0047] The conveyor roller 22 conveys the fiber bundle T wound from the spool 21 to the first storage roller 23. The first storage roller 23 is a fiber supply path located between the spool 21 and the fiber feeder 44 (described later), and consists of two rollers that can rotate about the rotation axis of the motor M1. The motor M1 is a servo motor that adjusts the tension of the fiber bundle T by rotating the first storage roller 23. The tension-adjusted fiber bundle T is then conveyed to the tension division section 30 via the conveyor rollers 25, 26, 28, and the moving roller 27.

[0048] To compensate for slack or deficiencies in the fiber bundle T, the active yarn feeder 29 changes the length of the fiber supply path by moving the moving roller 27. Thus, the active yarn feeder 29 absorbs accelerations and decelerations in the speed of the conveyed fiber bundle T. The conveying rollers 26 and 28, the moving roller 27, and the active yarn feeder 29 are collectively referred to as the speed absorption section.

[0049] The measuring unit C1 measures the tension of the fiber bundle T fed through the first yarn storage roller 23. The measuring unit C1 includes a conveying roller 25 that presses against the fiber bundle T to impart tension and rotates as the fiber bundle T is conveyed. The measuring unit C1 measures the tension of the fiber bundle T based on the reaction force received by the conveying roller 25 from the fiber bundle T. The measuring unit C1 outputs the measured tension as first tension information to the control unit 50.

[0050] The tension zoning section 30 includes multiple conveyor rollers 31-35. The tension zoning section 30 divides the tension range into a first tension range on the side of the spool 21 and a second tension range on the side of the inner liner 200. More specifically, the conveyor rollers 31-35 hold the fiber bundle T, and the conveyor rollers 32-34 are rotated by a motor to convey the fiber bundle T, thereby preventing the tension of the fiber bundle T on the side of the tension zoning section 30 closer to the spool 21 from affecting the tension of the fiber bundle T on the side of the tension zoning section 30 closer to the inner liner 200. The multiple conveyor rollers 31-35 convey the fiber bundle T without applying pressure to it in order to avoid damaging it. The fiber bundle T is conveyed to the fiber guide section 40 via the conveyor rollers 31-35.

[0051] The fiber guiding section 40 includes multiple conveying rollers 42 and 43, a second yarn storage roller 41, a measuring section C2, and a fiber feeder 44. The second yarn storage roller 41 is located in the fiber supply path between the first yarn storage roller 23 and the fiber feeder 44. The second yarn storage roller 41 consists of two rollers capable of rotating about the rotation axis of a motor M2. The motor M2 is a servo motor that adjusts the tension of the fiber bundle T by rotating the second yarn storage roller 41. The tension-adjusted fiber bundle T is then conveyed to the fiber feeder 44 via the conveying rollers 43.

[0052] The measuring unit C2 measures the tension of the fiber bundle T fed through the second yarn storage roller 41. The measuring unit C2 is equipped with a conveying roller 43 that is pressed in a manner that applies tension to the fiber bundle T and rotates according to the conveying of the fiber bundle T. The measuring unit C2 measures the tension of the fiber bundle T based on the reaction force received by the conveying roller 43 from the fiber bundle T. The measuring unit C2 outputs the measured tension as second tension information to the control unit 50.

[0053] The fiber feeder 44 is located in the fiber supply path between the spool 21 and the inner liner 200. The fiber feeder 44 includes a first fiber supply roller 45, a second fiber supply roller 46, and a third fiber supply roller 47. The fiber feeder 44 uses the three fiber supply rollers 45-47, which are rotating rollers, to supply fiber bundles T to the inner liner 200. In this embodiment, the fiber bundle T enters from the side of the first fiber supply roller 45, contacts the lower outer periphery of the first fiber supply roller 45, the upper outer periphery of the second fiber supply roller 46, and the lower outer periphery of the third fiber supply roller 47, respectively, and is supplied to the inner liner 200. The fiber bundle T is hung perpendicularly to the rotation axis on the fiber supply rollers 45-47. It should be noted that... Figure 1 The image shows a portion of the rollers included in the fiber feeder 44.

[0054] The control unit 50 is configured as a computer equipped with a CPU and memory. The CPU executes the control program stored in the memory to implement the functions of the first adjustment unit 51, the second adjustment unit 52, the speed control unit 53, the calculation unit 54, the first acquisition unit 55, and the second acquisition unit 56. However, some or all of the functions of these units may also be implemented using hardware circuits. Furthermore, the control unit 50 controls the rotation of the inner tube 200, the reciprocating movement of the fiber feeder 44, and the active yarn storage unit 29 by executing the control program generated by the external computer 300 equipped with the external CPU and memory of the manufacturing apparatus 100.

[0055] The first adjustment unit 51 adjusts the fiber tension by rotating the rotating shaft of the first yarn feeder roller 23 under torque control of the motor M1. The second adjustment unit 52 adjusts the fiber tension by rotating the rotating shaft of the second yarn feeder roller 41 under torque control of the motor M2.

[0056] The speed control unit 53 rotates the spool 21 to control the supply speed, which is the speed at which fibers are supplied from the spool 21.

[0057] The calculation unit 54 calculates an estimated supply speed, which is the estimated supply speed, based on the winding position of the fibers in the inner liner 200, as described later. The calculation unit 54 calculates the winding position of the fibers in the inner liner 200 using the position of the fiber feeder 44 in the direction of the rotation axis of the inner liner 200 and the radius of the dome 204. Details of the calculation method for the estimated supply speed will be described later.

[0058] The first acquisition unit 55 acquires first tension information related to the tension of the fibers in the first yarn feeder roller 23 from the measurement unit C1. The second acquisition unit 56 acquires second tension information related to the tension of the fibers in the second yarn feeder roller 41 from the measurement unit C2. The first tension information and the second tension information are, for example, information including the tension of the fiber bundle T and the amount of change in the tension of the fiber bundle T per unit time. Hereinafter, the first tension information and the second tension information will also be referred to together as "tension information".

[0059] Figure 2 This diagram shows the state in which the fiber bundle T is wound onto the inner liner 200 via the fiber feeder 44. The inner liner 200 has a cylindrical portion 202 and two approximately hemispherical domes 204 located at both ends of the cylindrical portion 202. In this embodiment, the domes 204 are hemispherical in shape with a radius r0. Furthermore, the distance a from the center of the cylindrical portion 202 in the direction of the rotation axis of the inner liner 200 is a distance a.

[0060] The fiber feeder 44 is movable along the front-to-back axis (x-axis) and the transverse axis (y-axis). Furthermore, the front end of the fiber feeder 44, which includes fiber feed rollers 45 to 47, is capable of rotating about the swing axis (x-axis). For example, during operation using the swing axis, the fiber bundle T twists by more than 90°.

[0061] Figure 3 This is a flowchart illustrating an example of a supply speed control process. The supply speed control process is the process by which the control unit 50 controls the supply speed. This process is performed during the manufacture of the can.

[0062] In step S100, the calculation unit 54 calculates the estimated supply speed. This process is also referred to as the "calculation process". The calculation unit 54 first calculates the winding position of the fibers in the inner liner 200 using the following mathematical formula (1).

[0063]

Mathematical Formula (1)

[0064]

[0065] Here, r is the winding position of the fibers in the rotational direction within the inner liner 200, and is the radial length from the rotational axis of the inner liner 200 to the fiber bundle T. x is the position of the fiber supplier 44 in the rotational axis direction of the inner liner 200. More specifically, x is the distance of the fiber supplier 44 from the center of the inner liner 200 in the rotational axis direction along the rotational axis direction. For example, when the fiber supplier 44 is located at... Figure 2 In the case shown by the dashed line, the fiber bundle T in the dome 204 has a length r in the radial direction from the axis of rotation of the inner liner 200.

[0066] Next, the calculation unit 54 uses the winding position of the fibers in the inner liner 200 calculated by mathematical formula (1) to calculate the estimated supply speed by the following mathematical formula (2).

[0067]

Mathematical Expression (2)

[0068]

[0069] Here, V1 is the winding speed of the fibers in the inner liner 200, and V2 is the fiber movement speed generated by the movement of the fiber feeder 44. N is the number of revolutions per unit time of the inner liner 200, l is the length of the fiber path from the spool 21 to the inner liner 200, L is the length of the fiber path from the spool 21 to the fiber feeder 44, and y is the distance from the fiber feeder 44 to the can in the fiber delivery direction. It should be noted that r and x are the same as the variables r and x in the above mathematical formula (1).

[0070] Control unit 50 in step S110 (refer to) Figure 3 The first acquiring unit 53 acquires the first tension information, and the first acquiring unit 55 acquires the second tension information. This process is also referred to as the "acquisition process". It should be noted that steps S100 and S110 are not limited to this order and can be performed in any order or simultaneously.

[0071] In step S120, the speed control unit 53 controls the supply speed based on the estimated supply speed calculated in step S100 and the tension information obtained in step S110, thus ending the supply speed control process. More specifically, the speed control unit 53 controls the supply speed such that the tension of the fibers in the first yarn feeder roller 23 is within a predetermined first range and the tension of the fibers in the second yarn feeder roller 41 is within a predetermined second range. When the tension of the fiber bundle T increases, the supply speed is increased; when the tension of the fiber bundle T decreases, the supply speed is decreased. This process is also referred to as the "speed control process".

[0072] Figure 4 This is a flowchart illustrating an example of the first data generation process. The first data generation process involves an external computer 300 generating motion data related to the rotation of the inner liner 200 and the reciprocating movement of the fiber feeder 44 during the manufacture of the can. This process is performed before the manufacture of the can based on the manufacturing apparatus 100.

[0073] In step S200, the external computer 300 generates CADWIND data. CADWIND data refers to data showing how the rotation of the inner tube 200 and the reciprocating movement of the fiber feeder 44 are linked. CADWIND data, for example, is discontinuous timing data showing where the fiber feeder 44 is located axially within the inner tube 200 at a given moment.

[0074] In step S210, the external computer 300 generates first action data based on the CADWIND data generated in step S200. The first action data refers to the timing data of the CADWIND data.

[0075] In step S220, the external computer 300 records the first action data generated in step S210, thus ending the first data generation process. In this embodiment, the external computer 300 records the first action data in its internal storage area. It should be noted that the external computer 300 may also record the first data in the storage area of ​​the control unit 50 or on an external storage medium.

[0076] Figure 5 This is a flowchart illustrating an example of the fiber feeder / can control process. The fiber feeder / can control process involves the control unit 50 controlling the rotation of the inner liner 200 and the reciprocating movement of the fiber feeder 44 during can manufacturing. The control unit 50 performs this process repeatedly during can manufacturing.

[0077] In step S300, the control unit 50 reads the data generated by the first data generation process (see reference). Figure 4 The first motion data generated. In this embodiment, the control unit 50 reads the first motion data of the two layers of fiber bundle T in the inner liner 200.

[0078] In step S310, the control unit 50 uses the first motion data read in step S300 to control the rotation of the inner liner 200 and the reciprocating movement of the fiber feeder 44.

[0079] Figure 6 This is a flowchart illustrating an example of the second data generation process. The second data generation process is the process by which an external computer 300 generates operational data for the active reservoir 29. This process is performed before the manufacture of the tank based on the manufacturing apparatus 100.

[0080] External computer 300 generates CADWIND data in step S200. This process is related to the first data generation process (see reference). Figure 4 The same process as step S200 in )

[0081] In step S215, the external computer 300 generates second motion data based on the CADWIND data generated in step S200. The second motion data refers to data showing how to control the active yarn reservoir 29 in conjunction with the rotation of the inner tube 200 and the reciprocating motion of the fiber feeder 44. In this embodiment, the external computer 300 generates the second data based on the CADWIND data and the estimated supply speed calculated by the calculation unit 54. It should be noted that the external computer 300 may also generate the second data based on the first data generated according to the CADWIND data and the estimated supply speed.

[0082] In step S225, the external computer 300 records the second action data generated in step S215, thus ending the second data generation process. In this embodiment, the external computer 300 records the first action data in its internal storage area. It should be noted that the external computer 300 may also record the first data in the storage area of ​​the control unit 50 or on an external storage medium.

[0083] Figure 7 This is a flowchart illustrating an example of the active reservoir control process. The active reservoir control process is the process by which the control unit 50 controls the active reservoir 29 during the manufacture of the tank. The control unit 50 performs this process repeatedly during the manufacture of the tank.

[0084] In step S400, the control unit 50 reads the data generated by the second data generation process (see reference). Figure 6 The second motion data generated. In this embodiment, the control unit 50 reads the second motion data of the two layers of fiber bundle T in the inner liner 200.

[0085] In step S410, the control unit 50 uses the second action data read in step S400 to control the active yarn feeder 29. For example, when the estimated supply speed increases, the control unit 50 controls the active yarn feeder 29 to move the moving roller 27 in a way that shortens the fiber supply path, thus preventing insufficient fiber bundle T. Furthermore, when the estimated supply speed decreases, the control unit 50 controls the active yarn feeder 29 to move the moving roller 27 in a way that lengthens the fiber supply path, thus preventing the fiber bundle T from becoming loose.

[0086] According to the can manufacturing apparatus 100 of this embodiment described above, the calculation unit 54 pre-calculates the estimated supply speed based on the winding position of the fibers in the inner liner 200 calculated using the position of the fiber feeder 44 in the direction of rotation axis of the inner liner 200 and the radius r0 of the dome 204. Therefore, for example, when the fiber feeder 44 folds back at the end of the dome 204 opposite to the cylindrical portion 202 and the tension of the fiber bundle T fluctuates significantly, the response delay of the supply speed can be reduced compared to the case where control is performed based on tension information without pre-calculating the estimated supply speed. Therefore, the supply speed can be increased, thus enabling faster can manufacturing.

[0087] Furthermore, the calculation unit 54 uses mathematical formula (1) to calculate the winding position of the fibers in the inner liner 200, thus enabling it to calculate the winding position of the fibers in the dome 204 with high accuracy, and thus enabling it to calculate the estimated supply speed with high accuracy.

[0088] Furthermore, the control unit 50 reads pre-generated motion data and controls the rotation of the inner liner 200 and the reciprocating movement of the fiber feeder 44. Therefore, compared to the case of real-time calculation of motion data, the movement of the inner liner 200 and the fiber feeder 44 can be accelerated. Moreover, multiple cans can be manufactured using the same first motion data, making it easier to trace the main cause in the event of quality defects.

[0089] Furthermore, the second action data is determined based on the estimated supply rate. Therefore, the process of determining the timing action data of the active storage device 29 while manufacturing the tank can be omitted.

[0090] Furthermore, the manufacturing apparatus 100 includes a tension zoning unit 30, which divides the tension range into a first tension range where the first thread feeder roller 23 is located and a second tension range where the second thread feeder roller 41 is located. Therefore, the tension of the fiber bundle T in the spool 21 located in the first tension range is prevented from becoming excessive, while the tension of the fiber bundle T in the inner liner 200 located in the second tension range is increased. Moreover, the speed control unit 53 uses tension information from each tension range to control the supply speed, thus enabling high-precision control of the supply speed.

[0091] B. Second implementation method:

[0092] In the second embodiment, unlike the first embodiment, the calculation unit 54 corrects the estimated supply speed based on the moving speeds of the first wire feeder roller 23 and the second wire feeder roller 41 and the speed of the active wire feeder 29. The structure of the manufacturing apparatus 100 in the second embodiment is the same as that in the first embodiment, therefore, a description of the structure of the manufacturing apparatus 100 is omitted.

[0093] The calculation unit 54 calculates the estimated supply rate using the following mathematical formula (3).

[0094]

Mathematical Expression (3)

[0095] Vn=Vn+α-Va+β···(3)

[0096] Here, α is a value corrected based on the first feeder roller 23, and β is a value corrected based on the second feeder roller 41. Va is the speed of the active feeder 29.

[0097] According to the manufacturing apparatus 100 of the second embodiment described above, the calculation unit 54 corrects the estimated supply speed based on the moving speed of the first wire storage roller 23 and the second wire storage roller 41 and the speed of the active wire storage device 29, so that the estimated supply speed can be calculated with higher accuracy.

[0098] C. Other implementation methods:

[0099] (C1) In the above embodiments, the position and number of rollers are arbitrary and not limited to the above embodiments. Furthermore, for example, at least some or all of the active yarn feeder 29, tension zone section 30, and second yarn feeder roller 41 can be omitted.

[0100] (C2) In the above embodiment, the calculation unit 54 uses mathematical formula (1) to calculate the winding position of the fibers in the inner liner 200. Alternatively, the following mathematical formula (4) can also be used to calculate the winding position of the fibers in the inner liner 200.

[0101]

Mathematical Expression (4)

[0102]

[0103] In this case, the winding position of the fibers in the dome 204 can be easily calculated.

[0104] (C3) In the above embodiment, the calculation unit 54 can also calculate the winding position of the fibers in the inner liner 200 by taking into account the thickness of the layer of fiber bundles T formed in the inner liner 200. Therefore, the winding position of the fibers in the inner liner 200 can be calculated with higher accuracy. Consequently, the estimated supply speed can be calculated with higher accuracy.

[0105] (C4) In the above embodiment, the speed control unit 53 performs the speed control process (refer to...) Figure 3In step S120), the supply speed is controlled based on the estimated supply speed calculated in step S100 and the tension information obtained in step S110. However, the speed control unit 53 may also control the supply speed in the speed control process based on the estimated supply speed calculated in step S100, the tension information obtained in step S110, and information related to the tension of the fiber bundle T in the fiber feeder 44.

[0106] (C5) In the above embodiment, the first data and the second data are generated by an external computer 300. Alternatively, the first data and the second data may be generated by the control unit 50.

[0107] (C6) In the above embodiment, the control unit 50 reads the first data and the second data generated in advance by the external computer 300 to perform various controls during the manufacturing of the can. However, the control unit 50 is not limited to this; it may also read the first data and the second data generated simultaneously with the manufacturing of the can to perform various controls during the manufacturing process. For example, the control unit 50 may also read CADWIND data from the external computer 300 to generate the first data and the second data, and then perform various controls.

[0108] (C7) In the second embodiment described above, the calculation unit 54 corrects the estimated supply speed based on the moving speeds of the first wire feeder roller 23 and the second wire feeder roller 41 and the speed of the active wire feeder 29. However, it is not limited to this; the speed control unit 53 may also correct the estimated supply speed based solely on the moving speeds of the first wire feeder roller 23 and the second wire feeder roller 41. That is, the calculation unit 54 may also correct the estimated supply speed without basing it on the speed of the active wire feeder 29. In this case, Va in the above mathematical formula (3) is 0.

[0109] This disclosure is not limited to the embodiments described above, and can be implemented with various structures without departing from its spirit. For example, the technical features in the embodiments corresponding to the technical features described in the Summary of the Invention section can be appropriately replaced or combined to solve the above-mentioned problems or to achieve some or all of the above-mentioned effects. Furthermore, if a technical feature is not required to be described in this specification, it can be appropriately deleted.

[0110] Explanation of reference numerals in the attached figures

[0111] 20… Fiber winding section, 21… spool, 22, 24, 25, 26, 28, 31, 32, 33, 34, 35, 42, 43… conveying rollers, 23… first yarn feeder roller, 27… moving roller, 29… active yarn feeder, 30… tension zoning section, 40… fiber guiding section, 41… second yarn feeder roller, 44… fiber feeder, 45… first fiber supply roller, 46… second fiber supply roller, 47… third fiber supply roller, 50… control section, 51… first adjustment section, 52… second adjustment section, 53… speed control section, 54… calculation section, 55… first acquisition section, 56… second acquisition section, 100… manufacturing device, 200… inner liner, 202… cylindrical section, 204… dome, 300… external computer, C1, C2… measuring section, M1, M2… electric motor, T… fiber bundle.

Claims

1. A can manufacturing apparatus, comprising: A spool is provided to supply fibers wound onto a rotating inner liner, the inner liner having a cylindrical portion and hemispherical domes at both ends of the cylindrical portion. A fiber feeder, located in the fiber supply path between the spool and the inner liner, moves back and forth along the rotation axis of the inner liner to supply the fiber to the inner liner; The first yarn storage roller, located in the fiber supply path between the spool and the fiber feeder, is configured such that the rotating shaft can move. The first adjustment section rotates the first yarn feeder roller to adjust the tension of the fiber. The control unit rotates the spool to control the supply speed, which is the speed at which the fibers are supplied from the spool. The calculation unit calculates an estimated supply speed, which is the estimated supply speed, based on the position of the fiber feeder in the rotational axis direction of the inner liner and the radius of the dome, and the winding position of the fiber in the dome. The first acquisition unit acquires first tension information related to the tension of the fiber in the first yarn storage roller. The control unit controls the supply speed based on the estimated supply speed and the first tension information. The calculation unit calculates the winding position of the fiber in the dome using the following mathematical formula (1), and calculates the estimated supply rate using the following mathematical formula (2). 【Mathematical expression (1)】 r is the winding position of the fiber in the dome. r0 is the radius of the top of the circle. x is the position of the fiber supply device in the direction of the rotation axis of the inner liner. 'a' is the length from the center of the cylindrical portion in the direction of the rotation axis of the inner liner. 【Mathematical Expression (2)】 r is the winding position of the fiber in the dome. x is the position of the fiber supply device in the direction of the rotation axis of the inner liner. N is the number of revolutions per unit time of the inner liner. l is the length of the fiber path from the spool to the inner liner. L is the length of the fiber path from the spool to the fiber feeder. y is the distance from the fiber feeder to the inner liner in the fiber delivery direction.

2. The can manufacturing apparatus according to claim 1, wherein, The calculation unit corrects the calculated estimated supply speed based on the moving speed of the first wire feeder roller.

3. The can manufacturing apparatus according to claim 1 or 2, wherein, The control unit reads the first action data from the storage medium that records the first action data, and uses the first action data to control the rotation of the inner liner and the reciprocating movement of the fiber supply. The first action data is the timing action data of the rotation of the inner liner and the reciprocating movement of the fiber supply.

4. The can manufacturing apparatus according to claim 1 or 2, wherein, The manufacturing apparatus also includes an active yarn feeder located in the fiber supply path between the first yarn feeder roller and the fiber feeder, which modifies the length of the fiber supply path. The control unit reads the second action data from the storage medium that records the second action data, and uses the second action data to control the active line feeder. The second action data is the timing action data of the active line feeder determined based on the estimated supply speed.

5. The apparatus for manufacturing a tank according to claim 1 or 2, wherein, The manufacturing apparatus also includes: The second yarn storage roller, located in the fiber supply path between the first yarn storage roller and the fiber feeder, is configured such that a rotating shaft can move. The second adjustment section rotates the rotating shaft of the second yarn feeder roller to adjust the tension of the fiber; The tension zoning section divides the tension range of the fiber into a first tension range where the first yarn feeder roller is located and a second tension range where the second yarn feeder roller is located. as well as The second acquisition unit acquires second tension information related to the tension of the fibers in the second yarn storage roller. The control unit controls the supply speed based on the estimated supply speed, the first tension information, and the second tension information.

6. A method for manufacturing a can, comprising a calculation step, a receiving step, and a speed control step in the manufacturing apparatus. The manufacturing apparatus includes: A spool is provided to supply fibers wound into an inner liner, the inner liner having a cylindrical portion and hemispherical domes at both ends of the cylindrical portion. A fiber feeder, located in the fiber supply path between the spool and the inner liner, moves back and forth along the rotation axis of the inner liner to supply the fiber to the inner liner; The first yarn storage roller is located in the fiber supply path between the spool and the fiber feeder; A second yarn feeder roller is located in the fiber supply path between the first yarn feeder roller and the fiber feeder; and The control unit rotates the first yarn feeder roller to adjust the fiber tension, rotates the second yarn feeder roller to adjust the fiber tension, and rotates the spool to control the supply speed, which is the speed at which the fiber is supplied from the spool. In the calculation process, the control unit calculates an estimated supply speed, which is the estimated supply speed, based on the position of the fiber feeder in the rotation axis direction of the inner liner and the radius of the dome, and the winding position of the fiber in the dome. In the acquisition process, the control unit acquires tension information, which includes information related to the tension of the fibers in the first yarn feeder roller and information related to the tension of the fibers in the second yarn feeder roller. In the speed control step, the control unit controls the supply speed based on the estimated supply speed calculated in the calculation step and the tension information obtained in the acquisition step. In the calculation process, the winding position of the fiber in the dome is calculated using the following mathematical formula (1), and the estimated supply speed is calculated using the following mathematical formula (2). 【Mathematical expression (1)】 r is the winding position of the fiber in the dome. r0 is the radius of the top of the circle. x is the position of the fiber supply device in the direction of the rotation axis of the inner liner. 'a' is the length from the center of the cylindrical portion in the direction of the rotation axis of the inner liner. 【Mathematical Expression (2)】 r is the winding position of the fiber in the dome. x is the position of the fiber supply device in the direction of the rotation axis of the inner liner. N is the number of revolutions per unit time of the inner liner. l is the length of the fiber path from the spool to the inner liner. L is the length of the fiber path from the spool to the fiber feeder. y is the distance from the fiber feeder to the inner liner in the fiber delivery direction.

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