JP5145899B2 - Resin adhesion device - Google Patents

Description

  The present invention relates to a technique of a resin adhesion apparatus in filament winding molding in which a resin is adhered by spraying the resin toward the surface of a fiber bundle.

  FRP (FIBER REINFORCED PLASTICS) is well known as a material manufactured by impregnating a reinforcing fiber such as carbon fiber with a liquid thermosetting resin and then curing the resin. Conventionally, FRP has been widely used as pipes, bars, and the like.

  Filament winding molding is known as an FRP molding method. Filament winding molding is suitable for producing a pipe-shaped or cylindrical molded body. Filament winding molding is a method in which a reinforcing material such as roving impregnated with a liquid thermosetting resin is wound around a mold (mandrel) in a state without tension and then the resin is cured.

  In filament winding molding, a resin adhesion apparatus is known as an apparatus for adhering (impregnating) resin to fibers. For example, Patent Document 1 discloses a roller-type resin adhesion device. The roller system is a resin adhesion apparatus of a system in which a fiber bundle is run on an upper part of a roller whose lower part is immersed in a resin tank and resin is adhered to the fiber.

  The resin adhesion apparatus is required to be processed at high speed from the viewpoint of improving productivity in filament winding molding. However, the roller method has a limit in processing speed because there is a possibility that uneven adhesion of resin may occur when the processing speed is increased.

Accordingly, the inventors have developed a droplet jetting type resin adhesion device as a resin adhesion device replacing the roller method. The droplet ejection method includes a droplet ejection device having a large number of resin ejection nozzles and a traveling device that travels the fiber bundle at a predetermined distance from the nozzle, and is directed toward the fiber bundle surface of the traveling device. It is a resin adhesion device that injects resin with a droplet ejection device.
JP 2007-185827 A

The carbon fiber used for filament winding molding is in a fiber bundle state in which several μm filaments are bundled from several thousand to several tens of thousands. Such a fiber bundle may travel in a state where fiber breakage occurs in the droplet ejecting apparatus. Here, the fiber crack means a state in which a gap is generated along the traveling direction of the fiber bundle. When the fiber bundle travels at the droplet ejection target position in a state where fiber breakage occurs, the resin passes through the fiber bundle without hitting the fibers forming the fiber bundle. Therefore, the predetermined resin does not adhere to the fiber bundle, and a defective product due to insufficient droplet adhesion occurs.
Therefore, the problem to be solved is to make all the injected resin hit the fiber bundle in the resin adhesion apparatus in filament winding molding.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, according to claim 1, a droplet ejection device having a plurality of resin ejection nozzles, and a travel device that travels the fiber bundle at a predetermined facing distance from the nozzle, the fiber bundle of the travel device In the resin adhesion apparatus in filament winding molding in which resin is adhered by injecting resin toward the surface, the thickness of the fiber bundle is increased on the upstream side of the droplet ejection apparatus in the traveling apparatus. A dispersion part that disperses within a predetermined width; and an upstream part that spreads the width of the fiber bundle by pressing the thickness direction of the traveling fiber bundle on the upstream side of the dispersion part, and the predetermined width is: It is narrower than the width of the fiber bundle opened by the opening portion .

According to a second aspect of the present invention, in the resin adhering apparatus according to the first aspect, in the cross section perpendicular to the traveling direction of the fiber bundle, the dispersion portion is formed from a bottom portion adjacent to the fiber bundle and a side portion that regulates the predetermined width. The bottom portion has a plurality of protrusions .

According to a third aspect of the present invention, in the resin adhesion device according to the first or second aspect, the vibration generating device is provided, and the dispersion unit is configured to transmit vibration parallel to the width direction of the fiber bundle by the vibration generating device. is there.

  As effects of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, even when the fiber bundle traveling through the traveling device has a fiber crack, the dispersion portion disperses the thickness of the fiber bundle within a predetermined width. The fiber breakage of the fiber bundle is eliminated, and all the ejected droplets can be focused on the fiber bundle. Further, even when the fiber bundle traveling through the traveling device has a fiber crack, the fiber bundle is opened in the width direction by the opening portion, and the fiber bundle opened by the opening portion by the dispersion portion. The thickness of the fiber bundle is dispersed within a predetermined width that is at least narrower than the width. Therefore, in the resin adhesion apparatus, the fiber breakage of the traveling fiber bundle is eliminated, and all the ejected droplets can be focused on the fiber bundle.

According to the second aspect of the present invention, since the plurality of protrusions function to smooth the fibers with respect to the back surface of the fiber bundle, the dispersion effect in the dispersion portion can be improved. That is, in the resin adhering apparatus, the fiber breakage of the traveling fiber bundle is eliminated, and all the injected resin can be focused on the fiber bundle.

According to the third aspect, since the vibration in the width direction of the fiber bundle is propagated to the dispersion portion by the vibration generator, the dispersion effect in the dispersion portion can be improved. That is, in the resin adhering apparatus, the fiber breakage of the traveling fiber bundle is eliminated, and all the injected resin can be focused on the fiber bundle.

Next, embodiments of the invention will be described.
FIG. 1 is a perspective view showing devices in filament winding molding according to an embodiment of the present invention, FIG. 2 is a side view showing a resin adhesion device, and FIG. 3 is a side view showing a droplet ejecting device.
4A is a plan view of the second embodiment of the diffusing portion, FIG. 4B is a cross-sectional view showing a cross section of b2-b2 ′, and FIG. 5A is a plan view of the third embodiment of the diffusing portion. FIG. 6B is a cross-sectional view showing a cross section of b3-b3 ′, FIG. 6C is a cross-sectional view showing a cross section of c3-c3 ′, and FIG. 6 is a perspective view showing a fourth form of the diffusion portion.

First, with reference to FIG. 1, a filament winding molding apparatus 1 having a resin adhering apparatus 4 according to an embodiment of the present invention as one constituent apparatus will be briefly described.
As shown in FIG. 1, the filament winding molding apparatus 1 applies a predetermined tension to a fiber unwinding apparatus 2 that unwinds a carbon fiber bundle (hereinafter simply referred to as a fiber bundle) 100 from a bobbin 6. The tension device 3 is configured to include the resin adhesion device 4 that adheres the resin 200 (see FIG. 3) to the fiber bundle 100, and the traverse device 5 that traverses the fiber bundle 100. Note that the white arrow in FIG. 1 indicates the traverse direction of the traverse device 5.
With such a configuration, the fiber bundle 100 is wound around the mandrel 7 while the resin 200 is adhered by the resin adhesion device 4 and traversed by the traverse device 5. In addition, the fiber bundle 100 is exhibiting the tape shape which has a flat surface up and down, and the resin 200 adheres to the surface by the resin adhesion apparatus 4. FIG.

  The resin adhering device 4 according to an embodiment of the present invention includes a traveling device 11, a droplet ejecting device 20, a comb guide 41 as a dispersion unit, and a fiber opening roller 51 as a fiber opening unit. In the resin adhering device 4, from the upstream side in the direction from the bobbin 6 to the mandrel 7 (hereinafter, the bobbin 6 side is also referred to as the upstream side), the fiber opening roller 51, the comb guide 41, and the droplet ejecting device 20. Arranged in order.

  The traveling device 11 includes a pair of free rollers 11a and 11b. Further, the free rollers 11a and 11b are arranged so as to sandwich the resin adhesion device 4, respectively. The free rollers 11a and 11b are rotatable rollers. Here, the fiber bundle 100 travels by the rotation of the mandrel 7. However, it is also possible to run the fiber bundle 100 as a driving roller instead of the free rollers 11a and 11b. The free rollers 11a and 11b play a role of determining the travel position of the fiber bundle 100 in the resin adhering device 4 so that, for example, the droplet ejecting device 20 and the fiber bundle 100 are spaced apart from each other by a predetermined distance.

  The droplet ejecting device 20 is a device that ejects the resin 200 (see FIG. 2) toward the fiber bundle 100 traveling by the traveling device 11. Here, in the fiber bundle 100, the side on which the droplet ejection device 20 ejects the resin 200 is defined as the front surface, and the back side is defined as the back surface. The configuration of the droplet ejecting device 20 will be described later in detail.

  Next, the comb guide 41 as a dispersion part which comprises the resin adhesion apparatus 4, and the opening roller 51 as a fiber opening part are demonstrated in detail using FIG. In addition, let this structure be the 1st form of an opening part and a dispersion | distribution part. 2 and 3, the direction of the white arrow is the traveling direction of the fiber bundle 100.

  As shown in FIG. 2, the opening roller 51 is disposed so as to press the thickness direction of the fiber bundle 100. Further, the opening roller 51 is configured to be rotatable. Furthermore, the opening roller 51 rotates in synchronization with the traveling fiber bundle 100. Here, the traveling direction of the fiber bundle 100 is changed by the opening roller 51. In addition, the opening effect which mentions later is improved by arrange | positioning not only a single opening roller 51 but multiple.

  With such a configuration, the traveling fiber bundle 100 is expanded from the width W1 to the width W2 when passing through the opening roller 51 (W2> W1). More specifically, the fiber bundle 100 is compressed in the thickness direction by pressing the opening roller 51. In the fiber bundle 100, a part of the fibers moves in the width direction, and the width of the fiber bundle 100 increases. That is, the fiber bundle 100 is flattened by the opening roller 51. Of course, since the fiber bundle 100 does not change the number of fibers, the thickness decreases.

  The comb guide 41 is disposed in parallel with the fiber bundle 100 on the back surface of the fiber bundle 100. In addition, the comb guide 41 is formed of a bottom portion 41 a adjacent to the back surface of the fiber bundle 100 and a side portion 41 b that regulates the width of the fiber bundle 100 in a cross section perpendicular to the traveling direction of the fiber bundle 100. Further, the comb guide 41 is disposed such that the bottom 41a is close to the back surface of the fiber bundle 100. Here, the proximity means a position where a part of the fibers forming the back surface side of the traveling fiber bundle 100 is in contact with the bottom 41a. The material of the comb guide 41 is not particularly limited, but is made of metal in this embodiment.

  With such a configuration, the traveling fiber bundle 100 is narrowed from the width W2 to the width W3 (W3 <W2) when passing through the comb guide 41. That is, the width W2 is narrowed to the width W3 of the side portion 41b of the comb guide 41. At this time, since the fiber bundle 100 is regulated so as to be forcibly narrowed during traveling, the thickness of the fiber bundle 100 is dispersed within the width W3. Furthermore, since the fiber bundle 100 is close to the bottom 41a of the comb guide 41, the comb guide 41 does not provide frictional resistance for the traveling fiber bundle 100. The width W3 needs to be the same as the width for ejecting the resin 200 of the droplet ejecting apparatus 20 described later.

  In this way, even when the fiber bundle 100 traveling through the traveling device 11 is cracked, the fiber bundle 100 is opened in the width direction by the fiber opening roller 51, and the width direction by the comb guide 41. , The thickness of the fiber bundle 100 is dispersed within a width W3 that is at least narrower than the width W2 opened by the opening roller 51. Therefore, in the resin adhesion apparatus 4, the fiber breakage of the traveling fiber bundle 100 is eliminated, and all of the injected resin 200 can be focused on the fiber bundle 100.

Next, the droplet ejecting apparatus 20 will be described in detail with reference to FIG.
The resin 200 ejected by the droplet ejecting device 20 includes a main agent 200a and a curing agent 200b. The liquid droplet ejecting device 20 includes a first head 20a having a nozzle group for main agent ejection and a second head 20b having a nozzle group for ejecting a hardener.

  The first head 20 a includes one connection chamber 26 that receives the main agent 200 a fed from the branch flow path 23, one storage chamber 27 that is connected to the connection chamber 26 and stores the main agent 200 a, and the storage chamber 27. And a plurality of pressure chambers 28 branched from. In each pressure chamber 28, a nozzle 29a serving as an ejection port for the main agent 200a is provided. The first head 20 a uses a piezoelectric element 30 that expands and contracts due to a voltage as a pressure generation source for the pressure chamber 28, and a diaphragm (an upper wall) of each pressure chamber 28 has a diaphragm that is vibrated by the piezoelectric element 30. 31 is installed. When the diaphragm 31 is displaced in a convex shape that expands downward as indicated by a virtual line (two-dot chain line in FIG. 3) in response to the expansion and contraction of the piezo element 30, the volume in the pressure chamber 28 decreases. The main agent 12 composed of a predetermined amount of droplets in the picoliter order is ejected toward the upper surface of the fiber bundle 100 from the nozzle 29a that opens on the lower surface of the first head 20a. When the diaphragm 31 returns to a flat state as shown by a solid line in FIG. 3, the volume in the pressure chamber 28 increases, whereby the main agent 200 a is supplied from the storage chamber 27 to the pressure chamber 28.

In the connection chamber 26, the main agent 200 a is heated and a hot wire (constant temperature means) 33 for maintaining the main agent 200 a at a predetermined temperature (a constant temperature of 40 to 100 ° C.) and a temperature in the connection chamber 26 are detected. A temperature sensor (not shown) is arranged. The detection result by the temperature sensor is compared with a preset threshold value, and the hot wire 33 is turned on / off based on the comparison result, thereby maintaining the main agent 12 at a predetermined temperature (for example, 80 ° C. or higher).
The configuration of the second head 20b is also the same as that of the first head 20a. In FIG. 3, the same members are denoted by the same reference numerals, and the description thereof is omitted. Reference numeral 29b denotes a nozzle for discharging the curing agent.

Next, with reference to FIGS. 4A and 4B, the comb guide 42 which is the second form of the dispersing portion will be described in detail. FIG. 4B is a cross-sectional view showing a b2-b2 ′ cross section in FIG.
As shown in FIGS. 4A and 4B, the comb guide 42, like the comb guide 41, includes a bottom portion 42 a adjacent to the back surface of the fiber bundle 100, and a side portion 42 b that regulates the width W <b> 3 of the fiber bundle 100. , Is formed from. Further, the arrangement in the resin adhesion device 4 is the same as that of the comb guide 41. Here, in the comb guide 42, the upstream side (opening roller 51 side) of the traveling fiber bundle 100 is defined as the upper side, and the downstream side (droplet ejection device 20 side) is defined as the lower side.
As shown in FIG. 4A, the comb guide 42 has a plurality of protrusions 42c arranged substantially parallel to the width direction of the fiber bundle 100 at the upper end and the lower end of the bottom portion 42a. Further, the protrusion 42 c is arranged perpendicular to the back surface of the fiber bundle 100. As shown in FIG. 4B, the tip of each protrusion 42c is rounded. The height D1 of each protrusion 42c is sufficiently smaller than the thickness D of the fiber bundle 100 that passes therethrough.

  With such a configuration, the protrusion 42c of the bottom portion 42a functions to level the fibers with respect to the traveling fiber bundle 100. More specifically, the fiber bundle 100 has a dense portion and a sparse portion in the width direction, and when the dense portion tries to get over (pass through) a high portion of the protrusion 42c, the fiber bundle 100 travels in the traveling direction. Therefore, a part of the dense part of the fiber bundle 100 moves so as to slide sideways from a high part of the protrusion 42c to a low part. As a result, a part of the dense part of the fiber bundle 100 joins the sparse part, and the density of the fiber bundle 100 is averaged, that is, the thickness of the fiber bundle 100 is dispersed.

  In this way, the dispersion effect in the comb guide 42 can be improved. That is, in the resin adhesion apparatus 4, the fiber breakage of the traveling fiber bundle 100 is further eliminated, and all of the injected resin 200 can be focused on the fiber bundle 100. Therefore, the generation of defective products can be reduced.

Next, with reference to FIGS. 5A, 5B, and 5C, the comb guide 43, which is the third form of the dispersing portion, will be described in detail. 5B is a sectional view showing a b3-b3 ′ section in FIG. 5A, and FIG. 6C is a sectional view showing a c3-c3 ′ section in FIG. 5B.
As shown in FIGS. 5A, 5 </ b> B, and 5 </ b> C, the comb guide 43 has a bottom portion 43 a that is close to the back surface of the fiber bundle 100 and a width W <b> 3 of the fiber bundle 100, like the comb guides 41 and 42. And a side portion 43b that regulates. Further, the arrangement in the resin adhesion device 4 is the same as that of the comb guides 41 and 42.
As shown in FIG. 5A, the comb guide 43 has a plurality of grooves 43 c formed in the bottom 43 a in parallel with the traveling direction of the fiber bundle 100. The number, height, width, and the like of the groove 43c are not particularly limited in the present embodiment. As illustrated in FIG. 5C, the groove 43 c is formed in an arc shape in a cross section parallel to the traveling direction of the fiber bundle 100. That is, the groove 43 c is formed so that the substantially central portion rises in the traveling direction of the fiber bundle 100.

  By setting it as such a structure, the groove | channel 43c of the bottom part 43a functions like the fiber bundle 100 in driving | running | working is smoothed. In more detail, since it is the same as that of the protrusion 42c of the comb guide 42, description thereof is omitted. Further, since the running fiber bundle 100 has the groove 43c formed in an arc shape, the fiber bundle 100 passes smoothly without being caught at the upper end and the lower end of the comb guide 43 when passing through the comb guide 43. To do.

  In this way, the dispersion effect in the comb guide 43 can be improved. That is, in the resin adhesion apparatus 4, the fiber breakage of the traveling fiber bundle 100 is further eliminated, and all of the injected resin 200 can be focused on the fiber bundle 100. Therefore, the generation of defective products can be reduced. Moreover, since the damage of the fiber bundle 100 can be prevented when passing the comb guide 43, the reliability of the resin adhesion apparatus 4 can be improved.

Next, the comb guide 44 which is the fourth form of the dispersion portion will be described in detail with reference to FIG.
As shown in FIG. 6, the comb guide 44 includes a vibration generator 44d on the opposite side of the bottom 44a where the fiber bundle 100 is close. The comb guide 44 is propagated with vibrations generated by the vibration generator 44d. Here, the vibration propagated to the comb guide 44 is the vibration in the width direction of the fiber bundle 100 (open arrow in FIG. 6). That is, the comb guide 44 vibrates in the width direction of the fiber bundle 100.
Similar to the comb guides 41, 42, and 43, the comb guide 44 is formed of a bottom portion 44 a that is close to the back surface of the fiber bundle 100 and a side portion 44 b that regulates the width W <b> 3 of the fiber bundle 100. Here, the comb guide 44 may be in any form of the comb guides 41, 42, and 43 except that the comb guide 44 includes the vibration generator 44d. Further, the arrangement of the comb guide 44 in the resin adhesion device 4 is the same as that of the comb guides 41, 42, and 43.

  The vibration generator 44d is not particularly limited as long as it is a device that generates vibration. The vibration generator 44d of the present embodiment is a device that generates vibration by attaching and rotating a weight with a biased center of gravity on the shaft of the motor. Further, the type of vibration to be generated, such as frequency, is not particularly limited, but is set to about 100 Hz in this embodiment.

  With such a configuration, the comb guide 44 is vibrated by the vibration generating device 44 d and vibrates in the width direction of the fiber bundle 100. In other words, when the traveling fiber bundle 100 passes through the comb guide 44, it is forcibly smoothed by vibration within the width W3, and the thickness is dispersed.

  In this way, the dispersion effect in the comb guide 44 can be improved. That is, in the droplet ejection device 20, the fiber breakage of the traveling fiber bundle 100 is further eliminated, and all of the injected resin 200 can be focused on the fiber bundle 100. Therefore, the generation of defective products can be reduced.

The above-described comb guides 41, 42, 43, and 44 serving as the dispersing portions are formed so that the side portions 41b, 42b, 43b, and 44b have a width W3 in advance. However, the width W3 can be made variable by making one of the side portions 41b, 42b, 43b, and 44b movable. As described above, the width W3 needs to be the same as the width of the droplet ejecting apparatus 20 that ejects the resin 200.
For example, if the side portions 41b, 42b, 43b, and 44b are configured to be manually movable, the width W3 can be determined in accordance with the ejection width of the droplet ejection device 20. Further, if the side portions 41b, 42b, 43b, and 44b are configured to be automatically movable, the width W3 can be automatically determined by detecting the ejection width of the droplet ejection device 20 with a sensor or the like.

  Thus, the dispersion effect according to the processing amount of the fiber bundle 100 or the kind of fiber can be improved with respect to the traveling fiber bundle 100. That is, the versatility of the resin adhesion device 4 can be improved.

The perspective view which shows each apparatus in the filament winding shaping | molding which concerns on the Example of this invention. The side view which similarly shows the resin adhesion apparatus. The side view which similarly shows a droplet ejecting apparatus. Similarly (a) about a 2nd form of a diffusion part is a top view, (b) is a sectional view showing a section of b2-b2 '. Similarly (a) about the 3rd form of a diffusion part is a top view (b) is a sectional view showing the section of b3-b3 '. (C) is a sectional view showing the section of c3-c3'. The perspective view which similarly shows the 4th form of a spreading | diffusion part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filament winding molding apparatus 4 Resin adhesion apparatus 20 Droplet injection apparatus 41 * 42 * 43 * 44 Comb guide 42c Protrusion 43c Groove 44d Vibration generator 51 Opening roller 100 Fiber bundle 200 Resin

Claims (3)

A droplet ejection device having a plurality of resin ejection nozzles;
A traveling device that travels the fiber bundle at a predetermined facing distance from the nozzle;
With
By injecting resin by the droplet injection device toward the fiber bundle surface of the traveling device,
In a resin adhesion apparatus in filament winding molding for attaching resin,
A dispersion unit that disperses the thickness of the fiber bundle within a predetermined width on the upstream side of the droplet ejection device in the traveling device ;
On the upstream side of the dispersion part, the opening part that presses the thickness direction of the traveling fiber bundle and widens the width of the fiber bundle,
With
The resin adhering apparatus , wherein the predetermined width is narrower than a width of a fiber bundle opened by the opening portion . In the resin adhesion apparatus of Claim 1,
The dispersion part has a bottom part close to the fiber bundle in a cross section perpendicular to the traveling direction of the fiber bundle;
Formed from a side portion that regulates the predetermined width;
The bottom part has a plurality of projections, The resin adhesion device characterized by things. In the resin adhesion apparatus of Claim 1 or 2,
A vibration generator,
Before Symbol dispersion unit, resin adhesion apparatus characterized by vibration parallel to the width direction of the fiber bundle is propagated by the vibration generator.

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