JP2007301759A - Manufacturing apparatus of fiber reinforced resin strand - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus of a fiber reinforced resin strand excellent in durability, which manufactures the fiber reinforced resin strand at a high production rate without causing sliding. <P>SOLUTION: In the manufacturing apparatus of the fiber reinforced resin strand, a spreader 8 for defibrillating a reinforcing fiber bundle 3 is arranged in a crosshead 5 to which a molten resin material 2 is continuously supplied from an extruder 6, twist rollers 11a and 11b for drawing the fiber reinforced resin strand 9 comprising the resin impregnated fiber bundle out of an outlet nozzle 5a to twist the same is provided in front of the outlet nozzle 5a of the crosshead 5, twist holding rollers 12a and 12b for holding the twist of the fiber reinforced resin strand are provided in front of the twist rollers 11a and 11b, and the twist rollers 11a and 11b and the twist holding rollers 12a and 12b are formed of a metal having unvenness on their surfaces. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for manufacturing fiber reinforced resin strands, and more particularly, to an apparatus for manufacturing fiber reinforced resin strands having excellent productivity of fiber reinforced resin strands and a long twist roller replacement interval.

  As a technique related to a conventional example related to a fiber reinforced resin strand and a manufacturing apparatus thereof, for example, one having a configuration described later is known. First, the manufacturing apparatus of the fiber reinforced resin strand which concerns on the prior art example 1 is demonstrated, referring FIG. 4 of the explanatory drawing. The apparatus for producing a fiber reinforced resin strand according to the conventional example 1 efficiently produces a fiber reinforced resin strand having high adhesion between a reinforcing fiber and a resin. That is, a spreader 58 for disentangling the reinforcing fiber bundle is disposed in a cross head 55 to which the molten resin material 52 is continuously supplied from the extruder 56. On the exit side of the cross head 55, a shaping die 59, a cooler 60, twisting rollers (also called cross roller capstans) 61a and 61b, and a drawing roller 62 are arranged in this order from the exit side. Has been.

According to such a fiber-reinforced resin strand manufacturing apparatus, the reinforcing fibers 51.51 are immersed in the molten resin material 52 in the crosshead 55 and impregnated with the resin, and then the cross-sectional shape is formed by the shaping die 59. And is cooled and hardened by the cooler 60. The twisting rollers 61a and 61b are rubber rollers, and are configured to be driven in reverse rotation. Further, the twist rollers 61a and 61b are disposed in an inclined direction in the horizontal plane, and the fiber reinforced resin strands 53 are sandwiched at the intersections of the twist rollers 61a and 61b and pulled in the direction of the arrow. The fiber reinforced resin strand 53 is rotated about the axis.
By such rotation, twist is imparted between the cooler 60 of the fiber reinforced resin strand 53 and the spreader 58a on the most downstream side. The fiber reinforced resin strand 53 to which the twist is applied is cut by a pelletizer 63 provided at a position away from the drawing roller 62 of the cross head 55. (For example, refer to Patent Document 1).

Next, the outline | summary of the manufacturing apparatus of the long fiber reinforced thermoplastic resin strand (henceforth a fiber reinforced resin strand) which concerns on the prior art example 2 is demonstrated. That is, the fiber reinforced resin strand manufacturing apparatus according to Conventional Example 2 is configured to be able to continuously manufacture the fiber reinforced resin strand for a long time. More specifically, a reinforcing fiber bundle is introduced into a molten thermoplastic resin in a thermoplastic resin bath container (crosshead), the reinforcing fiber bundle is impregnated with a thermoplastic resin, and the thermoplastic resin bath container An apparatus for producing a long fiber reinforced thermoplastic resin strand by pulling a resin impregnated fiber bundle from an outlet nozzle, wherein the reinforcing fiber bundle intersects with the running start of the reinforcing fiber bundle in the thermoplastic resin bath container. A roller that contacts the fiber bundle is disposed. The roller is composed of a shaft and a tube, and the tube is rotatably supported around the shaft. And the means to keep the twist of the fiber reinforced resin strand provided with the twist roller between the twist roller and the pelletizer which twist the fiber reinforced resin strand is provided (for example, refer patent document 2).
JP-A-5-169445 Japanese Patent Laid-Open No. 2003-175512

  Although the twisting roller of the fiber reinforced resin strand manufacturing apparatus according to Conventional Example 1 has a simple structure, it can be considered that the fiber reinforced resin strand can be pulled while being twisted and thus is excellent. However, since the two cylindrical twisting rollers are inclined in different directions and pulled at points where these twisting rollers come into contact (not lines), the fiber-reinforced resin strands are slippery. There was a problem. In order to prevent such slipping, in the case of this conventional example 1, as described above, a rubber roller is employed as the twisting roller.

Therefore, according to the apparatus for manufacturing a fiber reinforced resin strand according to the above-described conventional example 1, the twist roller is worn quickly and a strong pressing force cannot be applied to the fiber reinforced resin strand. Continuous production at a high production rate was not possible.
For example, when a fiber reinforced resin strand is produced at a production speed of 40 m / min by applying a strong pressing force in order to eliminate slippage at a high production speed, for example, the twist roller is increased in about 20 hours because wear is accelerated and slippage increases. There is a problem that the twist roller cannot be used at an early stage.

  In the fiber reinforced resin strand manufacturing apparatus according to Conventional Example 2, a means for maintaining the twist of the fiber reinforced resin strand applied by the twist roller is provided between the twist roller and the pelletizer. However, this is a configuration in which the roller shafts are arranged to face each other with the fiber reinforced resin strands interposed therebetween, and the angles of the roller shafts are shifted. Therefore, as in the case of the twist roller according to the conventional example 1, there is a problem that the fiber reinforced resin strands are easily slipped because the fiber reinforced resin strands are in point contact.

  Accordingly, an object of the present invention is to provide a fiber-reinforced resin strand manufacturing apparatus excellent in durability that can manufacture fiber-reinforced resin strands at a high production rate without causing slippage.

  The present invention has been made in view of the above circumstances, and therefore, in order to solve the above problems, the features of the means adopted by the fiber reinforced resin strand manufacturing apparatus according to claim 1 of the present invention are as follows. A spreader for defibrating the reinforcing fiber bundle is disposed in the cross head to which the molten resin material is continuously supplied from the extruder, and the resin-impregnated fiber bundle is provided from the outlet nozzle at a position in front of the outlet nozzle of the cross head. In the apparatus for producing a fiber reinforced resin strand that includes a twist roller composed of at least a pair of rollers that draws a fiber reinforced resin strand and imparts a twist, both of the rollers of the twist roller have irregularities formed on the surface. It is made of metal.

  The feature of the means adopted by the fiber reinforced resin strand manufacturing apparatus according to claim 2 of the present invention is that, in the fiber reinforced resin strand manufacturing apparatus according to claim 1, in the front position of the twisting roller, A twist holding roller comprising a pair of rollers for holding the twist of the fiber reinforced resin strand is provided, and both the rollers of the twist holding roller are made of a metal having an uneven surface.

  A feature of the means adopted by the apparatus for producing fiber-reinforced resin strands according to claim 3 of the present invention is the apparatus for producing fiber-reinforced resin strands according to any one of claims 1 and 2. The surface hardness of the metal is set to be equal to or higher than Hs60.

  The feature of the means employed by the apparatus for producing fiber-reinforced resin strands according to claim 4 of the present invention is the apparatus for producing fiber-reinforced resin strands according to any one of claims 1 to 3. The outer diameters of the rollers are all set to 50 mm or more.

  A feature of the means adopted by the apparatus for producing fiber-reinforced resin strands according to claim 5 of the present invention is the apparatus for producing fiber-reinforced resin strands according to any one of claims 1 to 4. The at least one of the twisting rollers and at least one of the twisting holding rollers are operable to approach each other and can press against the fiber reinforced resin strand with a constant or variable pressing force. There is a place to be composed.

  A feature of the means adopted by the apparatus for producing fiber-reinforced resin strands according to claim 6 of the present invention is that, in the apparatus for producing fiber-reinforced resin strands according to claim 5, according to the diameter of the fiber-reinforced resin strands. In addition, there is provided roller interval adjusting means for setting a minimum interval between the roller interval of the twist roller and the roller interval of the twist holding roller.

  According to the apparatus for manufacturing a fiber reinforced resin strand according to claim 1 of the present invention, a twist composed of at least a pair of rollers that draws a fiber reinforced resin strand composed of a resin-impregnated fiber bundle from the outlet nozzle of the cross head and imparts twist. Both rollers of the roller are made of metal having irregularities formed on the surface. Accordingly, the friction coefficient between the two rollers and the fiber reinforced resin strand is increased due to the unevenness of the twist roller, so that the fiber reinforced resin strand can be drawn without causing slippage. Further, since the twisting roller is made of metal, it is less likely to wear than the twisting roller made of the rubber roller of Conventional Example 1 and has a long life, so that the fiber-reinforced resin strand can be continuously drawn out over a long period of time.

  According to the apparatus for manufacturing a fiber reinforced resin strand according to claim 2 of the present invention, both the rollers of the twist holding roller composed of a pair of rollers that hold the twist of the fiber reinforced resin strand have irregularities formed on the surface thereof. It is made of metal. Accordingly, since the friction coefficient between the two rollers and the fiber reinforced resin strand increases due to the unevenness of the twist holding roller, the twist of the fiber reinforced resin strand can be held without causing slippage. In addition, since the twist holding roller is made of metal and is not easily worn and has a long life, the twist of the fiber-reinforced resin strand can be kept for a long period of time.

  According to the apparatus for manufacturing a fiber reinforced resin strand according to claim 3 of the present invention, the metal surface hardness of the twist roller and the twist holding roller is set to be equivalent to Hs60 or more. Therefore, the outer periphery of the twist roller and the twist holding roller has high hardness, excellent wear resistance, and a long service life. Therefore, the operating rate of the fiber reinforced resin strand manufacturing apparatus is improved and the productivity of the fiber reinforced resin strand is improved. Is possible.

  As described above, the fiber reinforced resin strand and the twisting roller, and the fiber reinforced resin strand and the twist holding roller are theoretically in point contact, but in reality, the fiber reinforced resin strand is slightly deformed and is in surface contact. According to the apparatus for manufacturing a fiber reinforced resin strand according to claim 4 of the present invention, since the outer diameters of the twist roller and the twist holding roller are both set to 50 mm or more, the outside of the twist roller and the twist holding roller is outside. Since a contact area becomes large according to a diameter, it can contribute to the improvement of slip prevention performance.

  According to the apparatus for manufacturing a fiber reinforced resin strand according to claim 5 of the present invention, at least one of the twist rollers and at least one of the twist holding rollers can be operated close to each other, and fiber reinforced. The resin strand can be pressed with a constant or variable pressing force. Therefore, since the pressing force of the twist roller and the twist holding roller against the fiber reinforced resin strand can be increased, slipping can be prevented. Further, the twist roller and the twist holding roller can be pressed with an appropriate pressing force with respect to the hardness of the fiber reinforced resin strand and the production speed of the fiber reinforced resin strand.

  According to the apparatus for manufacturing a fiber reinforced resin strand according to claim 6 of the present invention, the minimum interval between the roller interval of the twist roller and the roller interval of the twist holding roller is set according to the diameter of the fiber reinforced resin strand. It is configured as follows. Therefore, since the fiber reinforced resin strand can be pressed so as to have an appropriate crushing amount depending on the diameter of the fiber reinforced resin strand, an effect of preventing the fiber reinforced resin strand from being damaged can be obtained.

  Hereinafter, the manufacturing apparatus of the fiber reinforced resin strand which concerns on embodiment of this invention is demonstrated, referring an accompanying drawing. FIG. 1 is a schematic configuration explanatory view of a fiber-reinforced resin strand manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view of a twist roller of a fiber-reinforced resin strand manufacturing apparatus according to an embodiment of the present invention. FIG. 3 is a schematic perspective view of a twist holding roller of the apparatus for manufacturing a fiber reinforced resin strand according to the embodiment of the present invention.

  The apparatus for producing fiber-reinforced resin strands according to the embodiment of the present invention is configured as shown in FIG. That is, an extruder 6 incorporating a screw 7 is provided, and a crosshead 5 to which the molten resin material 2 is continuously supplied from the extruder 6 is provided. In the cross head 5, the reinforcing fiber bundle 3 composed of a plurality of reinforcing fibers 1 made of rollers and fed from a plurality of bobbins 4 is defibrated, and the reinforcing fiber bundle 3 A plurality of spreaders 8 for impregnating the molten resin material 2 are provided.

  Twist rollers 11a and 11b, which will be described later, draw fiber reinforced resin strands 9 made of resin-impregnated fiber bundles from the outlet nozzle 5a and apply twist to the front position in the right direction in FIG. 1 of the outlet nozzle 5a of the crosshead 5. Is arranged. Further, twist holding rollers 12a and 12b, which will be described later, that hold the twist of the fiber reinforced resin strand 9 are disposed in front of the twist rollers 11a and 11b. Further, a pelletizer 13 that is a cutting machine that cuts the fiber-reinforced resin strands into pellets is disposed in front of the twist holding rollers 12a and 12b. In addition, what is arrange | positioned between the said exit nozzle 5a and the twist rollers 11a and 11b and exit nozzle 5a is the cooler 10 which cools the fiber reinforced resin strand 9 which passes a hollow part. .

  The twisting rollers 11 a and 11 b are made of metal, and the rotation axis of the upper twisting roller 11 a and the rotation axis of the lower twisting roller 11 b in FIG. 2 are in a direction orthogonal to the moving direction of the fiber reinforced resin strand 9. Rather, the direction is set to be deviated by a predetermined angle from the orthogonal direction in directions opposite to each other on each horizontal plane. Moreover, the unevenness | corrugation 11c is formed in the surface of the twist rollers 11a and 11b by knurling. By the way, in this Embodiment, the pitch of the unevenness | corrugation 11c is set to 0.3-3 mm, Preferably it is set to 0.63-1.57 mm, and the height of the unevenness | corrugation 11c is set to 0.15-1.5 mm. Yes.

  The twist rollers 11a and 11b are each configured to be rotationally driven in the direction of drawing out the fiber reinforced resin strand 9 as indicated by arrows in FIG. Further, the minimum interval between the twisting rollers 11 a and 11 b is set according to the diameter of the fiber reinforced resin strand 9. By setting the minimum interval, it is possible to obtain an effect that the fiber reinforced resin strand 9 can be prevented from being damaged.

  By the way, in the case of the manufacturing apparatus of the fiber reinforced resin strand according to the present embodiment, both the twist rollers 11a and 11b are configured to be rotationally driven. May be configured to freely rotate. According to such a configuration, since the configuration is simplified, it is possible to obtain an economic effect that the facility cost is advantageous. Of course, the pulling force of the fiber reinforced resin strand 9 is weak, but a reasonable pulling force can be obtained, which is practical.

  Further, in the case of the fiber reinforced resin strand manufacturing apparatus according to the present embodiment, these twist rollers 11a and 11b are both configured to be able to operate close to each other, but either one is relative to the other. It is also possible to have a configuration in which the other approaches and the other is fixed. According to such a configuration, since the configuration of the contact / separation operation control mechanism for the twisting rollers 11a and 11b is simplified, it is possible to obtain an economic effect that the facility cost is advantageous.

The twist holding rollers 12a and 12b are made of metal like the twist rollers 11a and 11b, and the rotation axis of the upper twist holding roller 12a and the rotation axis of the lower twist holding roller 12b in FIG. In each horizontal plane, the direction is set to a direction deviated by a predetermined angle from the direction orthogonal to the moving direction of the fiber reinforced resin strands in directions opposite to each other. Further, irregularities 12c are formed on the surfaces of the twist holding rollers 12a and 12b by knurling.
The twist holding rollers 12a and 12b are both rotationally driven in the direction of pulling out the fiber reinforced resin strands as indicated by arrows in FIG. 3, and the twist holding rollers 12a according to the diameter of the fiber reinforced resin strands. , 12b is set to be the minimum interval. Of course, the fiber reinforced resin strands 9 can be prevented from being damaged by setting the minimum interval.

  Further, in the case of the fiber reinforced resin strand manufacturing apparatus according to the present embodiment, each of the twist holding rollers 12a and 12b is configured to be rotationally driven, but either one is rotationally driven and the other is rotationally driven. May be configured to freely rotate. According to such a structure, since the structure of the drive device of the twist holding rollers 12a and 12b is simplified, it is possible to obtain an economic effect that the facility cost is advantageous.

  Further, in the case of the fiber reinforced resin strand manufacturing apparatus according to the present embodiment, these twist holding rollers 12a and 12b are both configured to operate close to each other, but either one is the other. And the other may be fixed. According to such a configuration, since the configuration of the contact / separation operation control mechanism for the twisting rollers 12a and 12b is simplified, it is possible to obtain an economic effect that the facility cost is advantageous.

  By the way, for example, a spring, an air cylinder, a hydraulic cylinder, or the like can be used as the roller operating means for operating the twist rollers 11a and 11b and the twist holding rollers 12a and 12b to face each other. The pressing force of these rollers against the fiber reinforced resin strand 9 is adjusted by adjusting the amount of bending of the spring if the roller operating means is a spring, by adjusting the air pressure if it is an air cylinder, and by adjusting the hydraulic pressure if it is a hydraulic cylinder. Can be adjusted.

  Further, the minimum interval between the twist rollers 11 a and 11 b and the twist holding rollers 12 a and 12 b is configured to be set by, for example, mechanical means described later, and is set according to the diameter of the fiber reinforced resin strand 9. The minimum interval between these rollers is set to be in the range of 70 to 90% of the diameter of the normalized resin strand 9, and the degree of the minimum interval is determined by the mechanical strength of the fiber reinforced resin strand 9. Specifically, in the case of a fiber reinforced resin strand 9 made of a high-strength material, the minimum interval is set closer to 70%, and in the case of a fiber reinforced resin strand 9 made of a low-strength material, it is closer to 90%. The minimum interval may be set.

Incidentally, the minimum roller interval setting means 20 for setting the minimum interval between the twist rollers 11a and 11b and the twist holding rollers 12a and 12b is configured as shown in FIG.
That is, a pair of roller support rackets 22a are provided which are lifted and lowered by the expansion and contraction of the rod of the hydraulic cylinder 21 for applying a pressing force to the fiber reinforced resin strand 9 of the roller, and rotatably support both shaft end portions of the roller. And a stopper bolt 23 to which a lock nut 24 is screwed. The stopper bolt 23 is screwed to a female screw (not shown) screwed at both ends of the lift frame 22. In other words, the minimum roller interval is set by adjusting the stroke of the hydraulic cylinder 21 by adjusting the screwing amount of the stopper bolt 23.

  Hereinafter, an operation mode of the apparatus for manufacturing a fiber-reinforced resin strand according to the embodiment of the present invention will be described. That is, the reinforcing fiber bundle 3 composed of a plurality of reinforcing fibers 1 introduced into the cross head 5 from the bobbin 5 is defibrated by the spreader 8 and impregnated with the molten resin material 2 continuously supplied from the extruder 7. Is done. The resin-impregnated fiber bundle impregnated with the molten resin material 2 is drawn out from the outlet nozzle 5a of the crosshead 5 as the fiber-reinforced resin strand 9 by the twisting rollers 11a and 11b, and twisted. The twisted fiber reinforced resin strand 9 is further given a pulling force by the twist holding rollers 12a and 12b, and given a twisting force in the same direction as the twisting rollers 11a and 11b. Into pellets.

  According to the apparatus for manufacturing fiber reinforced resin strands according to the embodiment of the present invention, pellets are manufactured from the fiber reinforced resin strands 9 by the steps as described above, but the twist rollers 11a and 11b and the twist holding roller 12a are manufactured. , 12b are made of metal and have irregularities formed on the surface by knurling.

  Therefore, according to the apparatus for manufacturing a fiber reinforced resin strand according to the embodiment of the present invention, the twist rollers 11a and 11b, the twist holding rollers 12a and 12b, and the fiber reinforced resin strand 9 are formed by the unevenness formed on the surface by knurling. Therefore, the fiber reinforced resin strand 9 can be pulled out without causing slippage. Further, since the twisting rollers 11a and 11b are made of metal, they are less likely to wear than the twisting roller made of the rubber roller according to the conventional example and have a long life, and therefore longer than the case of the fiber reinforced resin strand manufacturing device according to the conventional example. The fiber reinforced resin strands 9 can be continuously drawn over a period and at a high production rate.

  The following examples confirmed that the surface hardness of the twist rollers 11a and 11b and the twist holding rollers 12a and 12b is preferably Hs60 or more. That is, when the fiber reinforced resin strand is pulled out at a production rate of 40 m / min, for example, a rubber roller forms a groove on the roller surface in one day, and the fiber reinforced resin strand cannot be pulled out and must be replaced. It became a state that could not be. Therefore, the twist rollers 11a and 11b and the twist holding rollers 12a and 12b are manufactured from metal, more specifically, an S45C tempered material (hardness: Hs40), and the roller surface is provided with irregularities with an iris pitch of 1 mm by knurling. Formed. In addition, the uneven | corrugated processing of the roller surface does not necessarily need to be based on a knurling process, You may process by other processing methods, for example, an electric discharge process, a wire cut process, etc.

With the twist rollers 11a and 11b made of the S45C tempered material (hardness: Hs40) and the twist holding rollers 12a and 12b, the fiber-reinforced resin strands could be drawn out for about 140 hours.
However, after that, slip occurred, and the fiber reinforced resin strand could not be drawn. Therefore, when the twist rollers 11a and 11b and the twist holding rollers 12a and 12b are manufactured from the SKD11 tempered material and the surface hardness is set to Hs60 by vacuum quenching after knurling, slipping may occur even after about 7000 hours. The fiber reinforced resin strand could be pulled out without any problem. In addition, quality problems such as scratches on the outer peripheral surface of the fiber reinforced resin strand due to the unevenness of the twist rollers 11a and 11b and the twist holding rollers 12a and 12b were not recognized.

  This means that the abrasion resistance of the roller surface is greatly improved and the amount of wear can be extremely reduced, so that the pressing force against the fiber reinforced resin strands can be increased in order to pull out the fiber reinforced resin strands at a higher production speed. This suggests that even if the value is increased, a long life is obtained. Incidentally, although the fiber reinforced resin strand was drawn out at a production rate of 70 m / min, no problems have occurred even after 3500 hours have passed.

  The twisted rollers 11a and 11b and the twist holding rollers 12a and 12b have a preferable diameter, an unevenness with an iris pitch of 1 mm is formed on the surface, and a roller of hardness Hs60 is used to produce a fiber reinforced resin strand at a production rate of 40 m / min. This was confirmed by the following examples.

  First, when the roller diameter was 40 mm, slipping was likely to occur even at 40 m / min, and the fiber reinforced resin strand could not be drawn out at a stable production rate. However, when the roller diameter is 50 mm, slippage does not occur even when the fiber reinforced resin strand is drawn at a production rate of 40 m / min, and the fiber reinforced resin strand can be drawn at a stable production rate. It was confirmed that it was far superior to 5 m / min in the case of a rubber roller.

  On the other hand, when the roller diameter was 60 mm, when the roller diameter was 70 mm, no slip occurred, and the fiber reinforced resin strand could be drawn out in a stable state even at a production rate of 40 m / min. In this embodiment, the upper and lower twist rollers 11a and 11b and the twist holding rollers 12a and 12b are all driven.

  In the above embodiment, the case where the upper and lower twist rollers 11a and 11b and the twist holding rollers 12a and 12b are made of SKD11 has been described as an example. However, the material is not particularly limited to SKD11, as long as it is a material that can ensure a hardness of Hs60 or higher by a hardness improvement process such as heat treatment. Moreover, the hardness measurement site | part measured the roller edge part surface which is the substantially same hardness as the knurled roller surface. Moreover, since the apparatus for producing fiber reinforced resin strands according to the above embodiment is only one specific example of the present invention, the form of the apparatus for producing fiber reinforced resin strands is not limited to the form according to the above embodiment. Furthermore, design changes and the like can be freely made without departing from the technical idea of the present invention.

It is typical structure explanatory drawing of the manufacturing apparatus of the fiber reinforced resin strand which concerns on embodiment of this invention. It is a typical perspective view of the twist roller of the manufacturing apparatus of the fiber reinforced resin strand which concerns on embodiment of this invention. It is a typical perspective view of the twist roller of the manufacturing apparatus of the fiber reinforced resin strand which concerns on embodiment of this invention. It is explanatory drawing of the manufacturing apparatus of the fiber reinforced resin strand which concerns on the prior art example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reinforcing fiber, 2 ... Molten resin material, 3 ... Reinforcing fiber bundle, 4 ... Bobbin, 5 ... Cross head, 5a ... Outlet nozzle, 6 ... Extruder, 7 ... Screw, 8 ... Spreader, 9 ... Fiber reinforcement Resin strand, 10 ... cooler, 11a, 11b ... twist roller, 11c ... uneven, 12a, 12b ... twist holding roller, 11c ... uneven, 13 ... pelletizer 20 ... roller minimum gap setting means, 21 ... hydraulic cylinder, 22 ... lift Frame, 22a ... Roller support racket, 23 ... Stopper bolt, 24 ... Lock nut

Claims (6)

  A spreader for defibrating the reinforcing fiber bundle is disposed in the cross head to which the molten resin material is continuously supplied from the extruder, and the resin impregnated fiber bundle from the outlet nozzle is disposed at a position in front of the outlet nozzle of the cross head. In the apparatus for producing a fiber reinforced resin strand provided with a twist roller comprising at least a pair of rollers for drawing out the fiber reinforced resin strand and imparting a twist, both of the rollers of the twist roller have irregularities formed on the surface. An apparatus for producing fiber-reinforced resin strands, characterized in that it is made of metal.   A twist holding roller comprising a pair of rollers for holding the twist of the fiber reinforced resin strand is provided at a position in front of the twist roller, and both of the rollers of the twist holding roller are made of metal having irregularities formed on the surface. It comprises, The manufacturing apparatus of the fiber reinforced resin strand of Claim 1 characterized by the above-mentioned.   The apparatus for producing a fiber-reinforced resin strand according to any one of claims 1 and 2, wherein the surface hardness of the metal is set to be equal to or higher than Hs60.   4. The apparatus for producing a fiber-reinforced resin strand according to claim 1, wherein an outer diameter of each of the rollers is set to 50 mm or more. 5.   At least one of the twisting rollers and at least one of the twisting holding rollers can be operated to approach each other and can be pressed against the fiber-reinforced resin strand with a constant or variable pressing force. The apparatus for producing a fiber-reinforced resin strand according to any one of claims 1 to 4, wherein the apparatus is a fiber-reinforced resin strand.   The roller interval adjusting means for setting the minimum interval between the roller interval of the twist roller and the roller interval of the twist holding roller according to the diameter of the fiber reinforced resin strand is provided. Equipment for fiber-reinforced resin strands.

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