JPWO2018096905A1 - Manufacturing method of pressure vessel - Google Patents

Abstract

A liner (9) having a cylindrical barrel portion and a dome-shaped mirror portion continuously provided at openings provided at both ends of the barrel portion is continuously impregnated with resin in a fiber bundle continuously fed out. The pressure vessel manufacturing method for winding the resin-impregnated fiber bundle (3), wherein the winding angle θ (°) of the resin-impregnated fiber bundle (3) in the trunk portion with respect to the major axis direction of the liner (9) is 10 °. In the helical winding range of ≦ θ ≦ 30 °, the width (BwHe: mm) of the wound resin-impregnated fiber bundle and the outer diameter (OD: mm) of the liner body portion are 0.02 ≦ BwHe / OD ≦ 0. Manufacturing method of pressure vessel controlled to satisfy 0.09. Even if the resin-impregnated fiber bundle (3) is wound helically around the mirror part of the liner (9), the pressure vessel can be molded without the resin-impregnated fiber bundle (3) slipping.

Description

The present invention relates to a fiber reinforced plastic (hereinafter referred to as FRP: Fiber Reinforced).
Sometimes called Plastic. This relates to a method for manufacturing a pressure vessel made of).

  Conventionally, pressure vessels have been used to hold gases such as nitrogen, oxygen, argon, liquefied petroleum gas and hydrogen over a long period of time. In recent years, pressure vessels for hydrogen gas vehicles, called CHG tanks (Compressed Hydrogen Gas Tanks), and air respirators used by hospitals and firefighters, are made of FRP. Etc. have been developed.

  These FRP pressure vessels and the like are generally manufactured by a filament winding molding (FW molding) method. The FW molding method is a dome in which a plurality of separately prepared fiber bundles and a liquid resin are integrated in a manufacturing process, and then connected to a cylindrical body and openings provided at both ends of the body. This is a molding method in which a fiber bundle is wound around a liner having a mirror-like part at a desired tension and angle. In this molding method, in order to give the pressure vessel the necessary strength, hoop winding for winding the fiber bundle in a direction substantially perpendicular to the major axis direction of the liner and helical winding for winding in a spiral shape are combined. This is not a problem in the case of hoop winding, in which the fiber bundle is wound around a liner body having a substantially constant outer diameter. Depending on the shape and the winding angle of the fiber bundle, the fiber bundle on the liner may slip and not wind.

  In general, in the FW molding method, the fiber bundle is basically wound along the geodesic line of the liner so that the fiber bundle does not slip (see Non-Patent Document 1). However, as the number of fiber bundles used increases as in this proposal, the width of the wound fiber bundle becomes wider, and the fiber bundle may slip even if the fiber bundle passes on the geodesic line of the liner. Also, from a design point of view, it may not be necessary to pass a geodesic line. Separately, Patent Document 1 states that “a filament that winds a fiber bundle supplied from a supply port of the fiber bundle guide around the outer peripheral surface of the liner by passing the helical head while rotating the liner. In the winding apparatus, there has been proposed a filament winding apparatus in which the fiber bundle guide is configured so that the width of the supply port can be changed. Here, the fiber bundle guide is wound by changing the width of the fiber bundle according to the portion of the liner. The effect of “can be done” is disclosed.

  However, in the proposed configuration, the width of the fiber bundle can be changed depending on the portion of the liner, but nothing is mentioned about a method for avoiding the fiber bundle slip at the mirror portion of the liner.

  In addition, Patent Document 2 states that “the width of a fiber formed by a plurality of parallel resin-impregnated fiber bundles transported from the transport unit and a plurality of parallel resin-impregnated fiber bundles transported from the transport unit is adjusted. And a delivery fiber width adjusting means for sending out, and a sensor for detecting the fiber width sent from the delivery fiber width adjusting means, and according to the fiber width of the resin-impregnated fiber bundle detected by the sensor, A filament winding system characterized by adjusting the width of a delivery fiber sent out from the fiber width adjusting means has been proposed. Here, the effect of “sending prepreg fibers having a stable fiber width continuously” is disclosed. ing.

  However, in the configuration of this proposal, as in the proposal of Patent Document 1, there is no mention of a method for avoiding fiber bundle slippage in the mirror part of the liner.

JP 2013-63592 A JP 2011-93276 A

“Filament Winding” Industrial Technology Library 26 (published by Nikkan Kogyo Shimbun) First edition published on May 30, 1970 (pages 103-105)

  Accordingly, an object of the present invention is to provide a method of manufacturing a pressure vessel in which a fiber bundle does not slip even if the fiber bundle is wound around a mirror portion of a liner by helical winding.

  Furthermore, another object of the present invention is to provide a method of manufacturing a pressure vessel that can improve the quality of the pressure vessel by changing the fiber bundle width between the helical winding and the hoop winding, and as a result, exhibits high strength. There is.

The present invention is intended to solve the above-described problem, and the method of manufacturing a pressure vessel according to the present invention is a dome shape that is connected to a cylindrical body and openings provided at both ends of the body. A pressure vessel manufacturing method for winding a resin-impregnated fiber bundle in which a resin bundle is continuously impregnated into a fiber bundle that is continuously fed to a liner having a mirror part of In the helical winding range in which the winding angle θ (°) of the resin-impregnated fiber bundle in the trunk portion is 10 ° ≦ θ ≦ 30 °, the width (BwHe: mm) of the wound resin-impregnated fiber bundle and the trunk portion of the liner The outer diameter (OD: mm) of the pressure vessel is controlled so as to satisfy the following formula (1).
0.02 ≦ BwHe / OD ≦ 0.09 (1)

  According to a preferred aspect of the pressure vessel manufacturing method of the present invention, the center position in the width direction of the resin-impregnated fiber bundle does not pass the geodesic line of the mirror portion in the helical winding wrap angle range.

  Moreover, according to the preferable aspect of the manufacturing method of the pressure vessel of this invention, when the unit of the molding pattern which completely covers the said trunk | drum is 1 layer, the helical winding layer which has a helical winding molding pattern is two or more layers. It is to repeat.

  Moreover, according to the preferable aspect of the manufacturing method of the pressure vessel of this invention, the fiber bundle winding tension | tensile_strength (T: N) at the time of the said helical winding, and the number (bundle) of fiber bundles satisfy | fill following Formula (2). That is. 20 ≦ T / book ≦ 60 (2)

Moreover, according to the preferable aspect of the manufacturing method of the pressure vessel of this invention, the hoop winding which further has the hoop winding whose winding angle (theta) (degree) of the said resin impregnation fiber bundle in the said trunk | drum is 85 degrees <= θ <90 degrees. It has a layer and the fiber bundle width (BwHo: mm) satisfies the following formula (3).
1 <BwHo / BwHe <1.4 (3)

  Furthermore, according to a preferred aspect of the pressure vessel manufacturing method of the present invention, the width of the resin-impregnated fiber bundle is controlled by a width regulating mechanism immediately before the resin-impregnated fiber bundle is wound around the liner.

  According to the present invention, even when the resin-impregnated fiber bundle is wound helically around the mirror part of the liner, the pressure vessel can be formed in a state where the resin-impregnated fiber bundle does not slip, and further, helical winding and hoop winding are possible. By changing the fiber bundle width, the quality of the pressure vessel can be improved, and a pressure vessel exhibiting high strength can be obtained.

It is a schematic block diagram explaining an example of the shaping | molding flow in the manufacturing method of the pressure vessel of this invention. It is a schematic perspective view which shows the winding angle in the method which concerns on this invention. It is a schematic perspective view explaining the width | variety (BwHe) of the helically wound fiber bundle wound around the liner in the method which concerns on this invention. It is a schematic perspective view explaining the fiber bundle which passes along the geodesic line of a liner. It is a schematic perspective view explaining the fiber bundle which does not pass through the geodesic line of the liner in the method which concerns on this invention. It is a schematic front view which shows the unit (1 layer) of the molding pattern which completely covers the trunk | drum of a liner in the method which concerns on this invention. It is a schematic block diagram explaining the fiber bundle winding tension in the method according to the present invention. It is a schematic perspective view explaining the width | variety (BwHo) of the fiber bundle of the hoop winding wound around the liner in the method which concerns on this invention. It is a schematic front view explaining the feed eye which provided the pin in order to control the width | variety of a fiber bundle in the method which concerns on this invention. It is a schematic front view explaining the feed eye which provided the roller groove | channel in order to control the width | variety of a fiber bundle in the method which concerns on this invention.

  Below, the manufacturing method of the pressure vessel of this invention is demonstrated in detail, referring drawings with embodiment.

  The present invention continuously impregnates a fiber bundle that is continuously fed into a liner having a cylindrical body and a dome-shaped mirror that is connected to openings provided at both ends of the body. A method for manufacturing a pressure vessel for winding a bundle of resin-impregnated fibers, wherein the winding angle θ (°) of the resin-impregnated fiber bundle in the trunk portion is 10 ° ≦ θ ≦ 30 ° with respect to the major axis direction of the liner. In the range of helical winding, the wound resin-impregnated fiber bundle width (BwHe: mm) and the outer diameter (OD: mm) of the liner body part are expressed by the formula (1): 0.02 ≦ BwHe / OD ≦ 0. 0.09 is a method of manufacturing a pressure vessel that is controlled so as to satisfy .09.

  An example of the molding flow in the pressure vessel manufacturing method of the present invention is shown in FIG. FIG. 1 is a schematic configuration diagram illustrating an overall configuration of an example of a molding flow in the method for manufacturing a pressure vessel of the present invention.

  In FIG. 1, reference numeral 1 denotes an overall configuration of the pressure vessel forming flow. Mainly, a creel roller 4 (4a, 4b in the illustrated example) responsible for the process of feeding the fiber bundle 3 from the bobbin 2 and a resin to the fiber bundle 3 are shown. Resin impregnation roller including resin impregnation step for impregnating resin, resin impregnation tank 7, and resin impregnation portion including guide roller 5 (5a to 5d in the illustrated example), and a winding step for winding fiber bundle 3 impregnated with resin It shows that the feed shaft 8, the liner 9, and the fixed shaft 10 that connects the molding apparatus and the liner 9 are arranged in this order.

  Although only one bobbin 2 is illustrated in FIG. 1, the present invention is not limited to this, and a plurality of bobbins 2 can be arranged.

In the present invention made to solve the above-described problem, as shown in FIGS. 2 and 3, the winding angle θ (°) of the resin-impregnated fiber bundle in the trunk portion of the liner 9 with respect to the major axis direction 11 of the liner 9. (Indicated by reference numeral 12 in FIG. 2), in the helical winding range of 10 ° ≦ θ ≦ 30 °, the wound resin-impregnated fiber bundle width (BwHe: mm) and the outer diameter (OD: mm) is controlled so as to satisfy the following expression (1).
・ 02 ≦ BwHe / OD ≦ 0.09 (1)
・

  With the above-described configuration of the present invention, sliding of the fiber bundle 3 at the liner mirror portion is suppressed. The slip of the fiber bundle 3 is a phenomenon in which the fiber bundle width is excessively widened at the liner mirror portion, the fiber bundle is cracked, and a part or all of the fiber bundles are detached from the liner mirror portion. Here, the present invention includes helical winding in which the winding angle θ (°) of the resin-impregnated fiber bundle 3 in the trunk portion is in the range of 10 ° ≦ θ ≦ 30 ° with respect to the major axis direction 11 of the liner. Is a configuration requirement.

  Next, the winding angle 12 of the fiber bundle of the present invention will be described. FIG. 2 is a schematic perspective view showing a winding angle according to the present invention. 2 shows a part of a form in which the fiber bundle 3 is wound at a winding angle 12 with respect to the liner major axis direction 11 of the liner 9. The winding angle 12 of the fiber bundle 3 is defined as the angle of the fiber bundle 3 with respect to the major axis direction 11 of the liner body. The winding angle 12 is not a measured value, but a calculated value at the center line 13 of the liner body that can be calculated from the FW winding pattern. In forming the pressure vessel, the entire liner can be reinforced with the fiber bundle 3 by the fiber bundle 3 including the winding angle 12.

  The helical winding angle 12 is preferably 11 to 29 °, more preferably 12 to 28 °, and further preferably 13 to 27 ° with respect to the major axis direction 11 of the liner. When the winding angle is less than 10 °, the fiber bundle may not be wound due to the restriction of the shape of the liner 9. Moreover, since the tension | tensile_strength which the fiber bundle 3 winds around the liner 9 will become large when a winding angle becomes larger than 30 degrees, the slip of the fiber bundle 3 is suppressed.

  In the present invention, in the helical winding range, the width (BwHe: mm) of the wound resin-impregnated fiber bundle and the outer diameter (OD: mm) of the liner body portion are 0.02 ≦ BwHe / OD ≦ 0. It is important that it is 09. As described above, the slip of the fiber bundle 3 is a phenomenon in which the fiber bundle width is excessively widened in the liner mirror portion, the fiber bundle is cracked, and a part or all of the fiber bundles are detached from the liner mirror portion. Therefore, in order to avoid yarn breakage, the ratio of BwHe to OD becomes important. That is, by appropriately concentrating BwHe with respect to OD, it is possible to suppress the spread of the fiber bundle at the liner mirror portion and to suppress the slip of the fiber bundle at the liner mirror portion.

  Next, the fiber bundle width (BwHe) and outer diameter (OD) of helical winding will be described. FIG. 3 is a schematic perspective view for explaining the width (BwHe) of the helically wound fiber bundle 3 wound around the liner 9.

  FIG. 3 shows a part of a form in which the fiber bundle 3 is wound on the liner 9 by helical winding. The fiber bundle width (BwHe) is the fiber bundle width measured at the center line 13 of the liner body. The outer diameter (OD) is an actual measurement value at the center line 13 of the liner body immediately before winding the fiber bundle 3 having a desired winding angle. By setting BwHe / OD to 0.02 to 0.09, the spread of the fiber bundle width at the liner mirror part is suppressed, and the fiber bundle 3 does not crack at the liner mirror part, and the slip of the fiber bundle 3 is suppressed. Is done.

  In order to make BwHe / OD less than 0.02, it is necessary to reduce BwHe. However, in order to reduce BwHe, a process of converging the widened fiber bundle 3 is required, and if the fiber bundle 3 is passed through the process, the fiber orientation of the fiber bundle 3 is disturbed and the strength of the pressure vessel is reduced. become. Moreover, when BwHe / OD becomes larger than 0.09, BwHe becomes large and the yarn becomes slippery at the mirror portion. BwHe / OD is preferably 0.022 ≦ BwHe / OD ≦ 0.088, more preferably 0.024 ≦ BwHe / OD ≦ 0.086, and further preferably 0.026 ≦ BwHe / OD ≦ 0. .084.

  Furthermore, according to the present invention, by controlling BwHe / OD to be 0.02 or more and 0.09 or less, the fiber bundle does not slip even if it does not pass the geodesic line. Here, the geodesic line will be described. A geodesic line is a trajectory that connects two points on a curved surface with the shortest distance. Since the trajectory is connected at the shortest distance, the fiber bundle on the geodesic line has no slack, and a constant tension is applied, so that the fiber bundle does not easily slide.

  FIG. 4 is a schematic perspective view for explaining a fiber bundle passing through the geodesic line of the liner, and FIG. 5 is a schematic perspective view for explaining a fiber bundle not passing through the geodesic line of the liner.

  FIG. 4 shows a part of the form in which the fiber bundle 3 is wound on the geodesic line 14, and FIG. 5 shows a part of the form in which the fiber bundle 3 is not wound on the geodesic line 14. As shown in FIG. 5, since the fiber bundle 3 does not pass on the geodesic line 14, the amount of the fiber bundle 3 wound around the liner 9 is reduced, so that the pressure vessel can be reduced in weight.

  Usually, when the fiber bundle 3 is removed from the geodesic line, the tension applied to the fiber bundle 3 decreases. At this time, if the fiber bundle width is large, the distance between the end of the fiber bundle 3 and the geodesic line 14 becomes long, and the tension applied to the fiber bundle 3 becomes low. Here, when the tension applied to the fiber bundle 3 becomes less than necessary, the fiber bundle 3 slips at the mirror portion. However, by controlling BwHe / OD to be not less than 0.02 and not more than 0.09, the width of the fiber bundle 3 is moderately regulated, so that the distance between the end of the fiber bundle 3 and the geodesic line 14 becomes close. As a result, a necessary tension is applied to the fiber bundle 3, and the fiber bundle 3 does not easily slide at the liner mirror portion.

  Furthermore, in the present invention, when the unit of the molding pattern that completely covers the liner body portion is one layer, the helical winding layer having the helical winding pattern is repeated two or more layers.

  FIG. 6 is a schematic front view showing a unit (one layer) of a molding pattern that completely covers the liner body, and shows an example of the one-layer molding pattern 15 that completely covers the liner body. In the FW molding method, when the fiber bundle 3 is wound around the liner 9, the resin in the fiber bundle oozes out to the surface, and the width of the fiber bundle to be wound later is widened by the bleed resin. The fiber bundle 3 may slip and break. In particular, when the same molding pattern is repeated, the fiber bundle 3 is likely to slip. Therefore, it is necessary to construct a plurality of molding patterns in order to avoid the same molding pattern, and a great deal of time is required for constructing the molding pattern. On the other hand, according to the present invention, by controlling the BwHe / OD to be 0.02 or more and 0.09 or less, it is possible to suppress the spread of the fiber bundle width at the liner mirror portion and to prevent the fiber bundle 3 from slipping. it can.

  Furthermore, according to the preferable aspect of the manufacturing method of the pressure vessel which concerns on this invention, the fiber bundle winding tension | tensile_strength (T: N) at the time of helical winding and the number of bundles (fiber) of a fiber bundle satisfy following Formula (2). It is. 20 ≦ T / book ≦ 60 (2)

  Here, the fiber bundle winding tension (T) during helical winding will be described. FIG. 7 is a schematic configuration diagram illustrating fiber bundle winding tension (T) 16 during helical winding in the pressure vessel manufacturing method. In FIG. 7, the tension (T) 16 is the fiber bundle pull-out tension from the feed eye 8. Although only one bobbin 2 is illustrated in FIG. 7, the present invention is not limited to this, and a plurality of bobbins 2 can be arranged.

  In the present invention, the range of T / line, which is the ratio of the fiber bundle winding tension (T: N) at the time of helical winding and the number of fiber bundles (line), is preferably 20 to 60 N, more preferably It is 25-55N, More preferably, it is 30-50N. In the case of less than 20N, the winding tension becomes low, so the fiber bundle 3 slips at the mirror part. On the other hand, if it exceeds 60 N, the fiber bundle 3 does not slip at the mirror part, but the fiber may be damaged and the strength may be lowered.

Furthermore, in the present invention, the resin body-impregnated fiber bundle in the liner body has a hoop winding layer having a hoop winding in which the winding angle θ (°) is 85 ° ≦ θ <90 °, and the fiber bundle width (BwHo: mm) However, it is preferable to satisfy | fill following Formula (3).
1 <BwHo / BwHe <1.4 (3)

  Here, the fiber bundle width (BwHo) of the hoop winding will be described. FIG. 8 is a schematic perspective view for explaining the width (BwHo) of a hoop-wrapped fiber bundle wound around a liner.

  FIG. 8 shows a part of the form in which the fiber bundle 3 is wound around the liner 9 by hoop winding. The fiber bundle width (BwHo) is the measured fiber bundle width at the center line 13 of the liner body. In the present invention, BwHe is converged so that the fiber bundle does not slip at the liner mirror. On the other hand, in hoop winding, it is preferable to widen the fiber bundle 3 in order to align the fiber orientation. Therefore, by making BwHo / BwHe larger than 1, the fiber orientation of the fiber bundle 3 of the hoop winding is uniform, and the strength of the pressure vessel is improved. When BwHo / BwHe is 1 or less, the fiber orientation of the hoop-wrapped fiber bundle 3 may be disturbed and the strength of the pressure vessel may be reduced. In addition, when BwHo / BwHe is 1.4 or more, the hoop winding angle θ becomes small, so that the strength of the pressure vessel may be lowered. BwHo / BwHe is preferably 1.02 ≦ BwHo / BwHe ≦ 1.38, more preferably 1.04 ≦ BwHe / OD ≦ 1.36, and further preferably 1.06 ≦ BwHe / OD ≦ 1. .36.

  In the present invention, it is preferable to control the width of the resin-impregnated fiber bundle in the width regulating mechanism immediately before winding the fiber bundle 3 around the liner 9. By performing the control of the fiber bundle width immediately before being wound around the liner 9, it is possible to wind the fiber bundle 3 having a stable width around the liner 9.

  FIG. 9 is a schematic front view for explaining a feed eye provided with a bar or a pin for controlling the width of the resin-impregnated fiber bundle, and FIG. 10 shows a roller having a groove for controlling the width of the fiber bundle. It is a schematic front view explaining the provided feed eye.

  FIG. 9 shows a part of the form in which the fiber bundle width regulating bar 17 is installed in the feed eye 8. A desired fiber bundle width can be obtained by changing the interval 18 of the fiber bundle width regulating bar 17. FIG. 10 shows a part of the form in which the groove roller 19 is installed on the feed eye 8. In FIG. 10, a desired fiber bundle width can be obtained by changing the groove width 20 of the groove roller 19. Further, the fiber bundle width regulating bar 17 and the groove roller 19 can be combined.

Next, the fiber bundle and resin used in the present invention will be described.
Examples of the fiber constituting the fiber bundle used in the present invention include glass fiber, carbon fiber, graphite fiber, aramid fiber, boron fiber, alumina fiber, and silicon carbide fiber. It is also possible to use a mixture of two or more of these reinforcing fibers. In order to obtain a molded product with higher strength, it is preferable to use carbon fibers in the fiber bundle.

  In the present invention, any type of carbon fiber can be used depending on the application. However, since a molded article having high strength can be obtained, tension in a strand tensile test by the method described in JIS R 7601 (1986). Carbon fibers having a strength of 3 to 8 GPa are preferably used.

  As the resin used in the present invention, a liquid resin is preferably used. Specifically, an epoxy resin composition containing an epoxy resin and a curing agent is preferable in order to obtain heat resistance and environmental resistance required for the pressure vessel. In order to shorten the curing time, a curing catalyst can be appropriately added.

  The pressure vessel produced in the present invention is not limited to hydrogen gas vehicles and natural gas vehicles, but ships and aircraft, and stationary types used by being fixed on the ground, air respirators used by hospitals and firefighters, etc. Is preferably used. Further, the substance stored in the pressure vessel may be a gas such as nitrogen, oxygen, argon, liquefied petroleum gas and hydrogen, or may be a liquefied product of these substances.

  Next, based on an Example, the manufacturing method of the pressure vessel of this invention is demonstrated concretely. The measuring method of winding angle, BwHe, OD, and T is as follows.

<Winding angle>
The winding angle was a calculated value at the center line of the liner body. The calculation was calculated from the FW program.

<BwHe, BwHo>
The fiber bundle width at the center line of the liner body was measured with a caliper ("Model No. 98764" manufactured by Shinwa Measurement Co., Ltd.) at the beginning, middle, and last of the number of windings of the fiber bundle. The fiber bundle width was an average value of three points.

<OD>
Before winding the fiber bundle, the liner OD at a position of 170 mm from the end of the trunk portion was measured with pie tape ("Model No. PM1SP" manufactured by Firtec). The measured value was an average of three times.

<T>
Before winding the helically wound fiber bundle, the tension (kg) was measured when the fiber bundle was tied to the tip of a spring ("ST-10" (Yamayo Measuring Machine Co., Ltd.)) and pulled. The average value was set as tension (T) = average value (kg) × 9.8 (N / kg).

(Example 1)
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, the outer diameter of the body portion was 160 mm, A liner with a barrel length of 340 mm and a mirror length of 57 mm is installed via a fixed shaft with an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Trekka” manufactured by Toray Industries, Inc. as a reinforcing fiber is registered on the liner. Trademarks) T700SC-24K yarn bundles are aligned and fed while impregnating the resin containing the resin composition. The fiber bundle defined by a width of 12.2 mm (BwHe / OD = 0.076) at a winding angle of ± 20 ° with respect to the axial direction of the liner was wound 47 times, and the fiber bundle was wound around the entire liner. Molding was completed without any problem of fiber bundle slip during molding, and the measured tension (T) was 117 N and T / piece was 39 N. The calculation of winding angle, BwHe, OD and T was as follows: The above method was followed and the results are shown in Table 1.

(Example 2)
(A) Mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether ("ARALDITE" (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine ("ARADUR" (registered trademark) ) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, the outer diameter of the body portion was 160 mm in a filament winding molding apparatus. A liner having a barrel length of 340 mm and a mirror length of 57 mm is installed through a fixed shaft having an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Torayca” manufactured by Toray Industries, Inc. is used as a reinforcing fiber. (Registered trademark) T700SC-24K three yarn bundles are aligned, and yarn is fed while impregnating the resin containing the resin composition. A fiber bundle defined as a width of 11.8 mm (BwHe / OD = 0.074) at a winding angle of ± 30 ° with respect to the axial direction of the liner was wound 47 times, and the fiber bundle was wound around the entire liner. Molding was completed without any problem of fiber bundle slip during molding, and the measured tension (T) was 63 N and T / piece was 21 N. The calculation of the winding angle, BwHe, OD and T was as follows: The above method was followed and the results are shown in Table 1.

Example 3
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, a filament winding molding apparatus was subjected to a barrel outer diameter of 400 mm, A liner with a body length of 500 mm and a mirror part length of 160 mm is installed via a fixed shaft with an outer diameter of 100 mm and a length of 300 mm. (Trademark) Three T700SC-24K yarn bundles are aligned and supplied while impregnating the resin containing the resin composition. The fiber bundle defined by a width of 25 mm (BwHe / OD = 0.063) was wound around the liner in a reciprocal manner at a winding angle of ± 20 ° with respect to the axial direction of the liner, and the fiber bundle was wound around the entire liner. There was no occurrence of fiber bundle slipping, and the molding was completed without any problem, and the measured tension (T) was 174 N and T / piece was 58 N. The calculation of the winding angle, BwHe, OD and T was as described above. The results are shown in Table 1.

(Comparative Example 1)
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, the outer diameter of the body portion was 160 mm, A liner with a barrel length of 340 mm and a mirror length of 57 mm is installed via a fixed shaft with an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Trekka” manufactured by Toray Industries, Inc. as a reinforcing fiber is registered on the liner. Trademarks) T700SC-24K yarn bundles are aligned and fed while impregnating the resin containing the resin composition. A fiber bundle having a width of 15.5 mm (BwHe / OD = 0.097) was wound around the liner in an axial direction of ± 20 ° with respect to the axial direction of the liner, and the fiber bundle was wound around the entire liner. The fiber bundle was scheduled to be wound, but the fiber bundle slipped at the 23rd reciprocation, and the fiber bundle was detached from the liner and the molding was stopped, and the winding angle, BwHe and OD were calculated according to the above method. Is shown in Table 1.

(Comparative Example 2)
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark) 2954 (Huntsman) (Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, a filament winding molding apparatus was provided with a trunk outer diameter of 160 mm and a trunk length. A liner having a diameter of 340 mm and a mirror part length of 57 mm is installed via a fixed shaft having an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Torayca” (registered trademark) T700SC manufactured by Toray Industries, Inc. is used as the reinforcing fiber. Three yarn bundles of −24K were aligned and supplied while impregnating the resin containing the resin composition in the axial direction of the liner. Then, a fiber bundle defined as a width of 20 mm (BwHe / OD = 0.125) was wound at a winding angle of ± 20 °, and the fiber bundle was wound around the entire liner. The fiber bundle slip occurred at the 17th reciprocation, and the fiber bundle was detached from the liner, and the molding was stopped, and the winding angle, BwHe and OD were calculated according to the above-described method, and the results are shown in Table 1.

(Comparative Example 3)
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, a filament winding molding apparatus was subjected to a barrel outer diameter of 400 mm, A liner with a body length of 500 mm and a mirror part length of 160 mm is installed via a fixed shaft with an outer diameter of 100 mm and a length of 300 mm. (Trademark) Three T700SC-24K yarn bundles are aligned and supplied while impregnating the resin containing the resin composition. A fiber bundle having a width of 40 mm (BwHe / OD = 0.100) was wound at a winding angle of ± 20 ° with respect to the axial direction of the liner, and the fiber bundle was wound around the entire liner. The bundle was scheduled to be wound, but the fiber bundle slipped at the 92nd round trip and the fiber bundle was detached from the liner, and the molding was stopped, and the winding angle, BwHe and OD were calculated according to the above method. Table 1 shows.

Example 4
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, the outer diameter of the body portion was 160 mm, A liner having a barrel length of 340 mm and a mirror length of 57 mm is installed via a fixed shaft having an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Torayca” (registered trademark) T700SC manufactured by Toray Industries, Inc. is used as a reinforcing fiber. Three -24K yarn bundles were aligned and fed while impregnating the resin containing the resin composition. A fiber bundle defined to have a width of 13.5 mm at a winding angle of ± 88.5 ° with respect to the axial direction was wound around the inner barrel so as to have a thickness of 1 mm. A fiber bundle defined to have a width of 11.8 mm at a winding angle of ± 20 ° with respect to the direction was wound to a thickness of 1.2 mm, and finally, ± 88. A fiber bundle having a width of 13.5 mm at a winding angle of 5 ° was wound to a thickness of 0.7 mm.

  BwHo / BwHe at this time was 1.14. Thereafter, the resin was cured at 100 ° C. for 4 hours to obtain a pressure vessel. The winding angle, BwHe and OD were calculated according to the method described above. Then, the burst test of the pressure vessel was done by the method described in KHKS0121 (2005). The bursting pressure was measured with a pressure transducer (Minbea Corp. model STD-200MP) installed in the liquid feeding pipe. The bursting pressure was 69 MPa. The results are shown in Table 2.

(Comparative Example 4)
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, the outer diameter of the body portion was 160 mm, A liner having a barrel length of 340 mm and a mirror length of 57 mm is installed via a fixed shaft having an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Torayca” (registered trademark) T700SC manufactured by Toray Industries, Inc. is used as a reinforcing fiber. Three -24K yarn bundles were aligned and fed while impregnating the resin containing the resin composition. A fiber bundle having a width of 8.8 mm was wound around the barrel of the liner to a thickness of 1 mm at a winding angle of ± 89.0 ° with respect to the axial direction. A fiber bundle having a width of 12.2 mm was wound at a winding angle of ± 20 ° with respect to the direction so as to have a thickness of 1.2 mm, and finally, ± 89. A fiber bundle having a width of 8.8 mm at a winding angle of 0 ° was wound to a thickness of 0.7 mm.

  BwHo / BwHe at this time was 0.72. Thereafter, the resin was cured at 100 ° C. for 4 hours to obtain a pressure vessel. The winding angle, BwHe and OD were calculated according to the method described above. Then, the burst test of the pressure vessel was done by the method described in KHKS0121 (2005). The bursting pressure was measured with a pressure transducer (Minbea Corp. model STD-200MP) installed in the liquid feeding pipe. As a result, the burst pressure was 63 MPa, which was a lower burst pressure than Example 4. The results are shown in Table 2.

(Comparative Example 5)
(A) A mixture of bisphenol A type epoxy resin and butanediol diglycidyl ether (“ARALDITE” (registered trademark) LY1564 SP CI (manufactured by Huntsman Japan)) and (b) cyclohexylamine (“ARADUR” (registered trademark)) 2954 (manufactured by Huntsman Japan Co., Ltd.) was mixed at a mass ratio of 100: 35 at a temperature of 20 ° C. Subsequently, the outer diameter of the body portion was 160 mm, A liner having a barrel length of 340 mm and a mirror length of 57 mm is installed via a fixed shaft having an outer diameter of 30 mm and a length of 300 mm, and carbon fiber “Torayca” (registered trademark) T700SC manufactured by Toray Industries, Inc. is used as a reinforcing fiber. Three -24K yarn bundles were aligned and fed while impregnating the resin containing the resin composition. A fiber bundle defined to have a width of 20.1 mm was wound around the barrel of the liner at a winding angle of ± 87.7 ° with respect to the axial direction so as to have a thickness of 1 mm. A fiber bundle having a width of 12.2 mm was wound at a winding angle of ± 20 ° with respect to the direction so as to have a thickness of 1.2 mm, and finally, ± 87. A fiber bundle having a width of 20.1 mm at a winding angle of 7 ° was wound to a thickness of 0.7 mm.

  BwHo / BwHe at this time was 1.65. Thereafter, the resin was cured at 100 ° C. for 4 hours to obtain a pressure vessel. The winding angle, BwHe and OD were calculated according to the method described above. Then, the burst test of the pressure vessel was done by the method described in KHKS0121 (2005). The bursting pressure was measured with a pressure transducer (Minbea Corp. model STD-200MP) installed in the liquid feeding pipe. As a result, the burst pressure was 65 MPa, which was a lower burst pressure than Example 4. The results are shown in Table 2.

1: Overall configuration of pressure vessel molding flow 2: Bobbin 3: Fiber bundle 4, 4a, 4b: Creel roller 5, 5a-5d: Guide roller 6: Resin impregnation roller 7: Resin impregnation tank 8: Feed eye 9: Liner 10 : Fixed axis 11: liner major axis direction 12: fiber bundle winding angle 13: liner trunk centerline 14: geodesic line 15: one layer molding pattern that completely covers the trunk 16: fiber bundle winding tension 17: fiber Bundle width regulating bar 18: Fiber bundle width regulating bar interval 19: Groove roller 20: Groove width of groove roller

Claims (6)

Resin impregnation by continuously impregnating resin into a fiber bundle that is continuously fed into a liner having a cylindrical body and a dome-shaped mirror that is connected to openings provided at both ends of the body. A method of manufacturing a pressure vessel for winding a fiber bundle, wherein the winding angle θ (°) of the resin-impregnated fiber bundle in the trunk portion is 10 ° ≦ θ ≦ 30 ° with respect to the longitudinal direction of the liner. In the range, the width (BwHe: mm) of the wound resin-impregnated fiber bundle and the outer diameter (OD: mm) of the body of the liner are controlled so as to satisfy the following formula (1): A method for manufacturing a pressure vessel.
0.02 ≦ BwHe / OD ≦ 0.09 (1)   2. The method of manufacturing a pressure vessel according to claim 1, wherein a center position in a width direction of the resin-impregnated fiber bundle does not pass through a geodesic line of the mirror part in a winding angle range of the helical winding.   3. The method of manufacturing a pressure vessel according to claim 1, wherein when the unit of the molding pattern that completely covers the body portion is one layer, two or more helical winding layers having a helical winding molding pattern are repeated. . The fiber bundle winding tension (T: N) at the time of the helical winding and the number of bundles (lines) of the fiber bundle are controlled so as to satisfy the following expression (2). A manufacturing method of a pressure vessel given in 2.
20 ≦ T / book ≦ 60 (2) Furthermore, it has a hoop winding layer having a hoop winding in which the winding angle θ (°) of the resin-impregnated fiber bundle in the trunk portion is 85 ° ≦ θ <90 °, and the width (BwHo: mm) of the fiber bundle is The method for manufacturing a pressure vessel according to any one of claims 1 to 4, wherein the following expression (3) is satisfied.
1 <BwHo / BwHe <1.4 (3)   The method of manufacturing a pressure vessel according to any one of claims 1 to 5, wherein the width of the resin-impregnated fiber bundle is controlled by a width regulation mechanism immediately before the resin-impregnated fiber bundle is wound around the liner.

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