JP2009107147A - Process and apparatus for producing long-fiber-reinforced thermoplastic resin pellet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a process and an apparatus for producing long-fiber-reinforced thermoplastic resin pellets in which a reinforcing fiber bundle is continuously drawn out from a winding body of a fiber bundle package body to introduce into an impregnated die, and a collapse of a winding layer can be prevented even if a reinforcing fiber bundle is drawn out to the vicinity of the outermost winding layer of the winding body by a drawing method in producing the long-fiber-reinforced thermoplastic resin pellet. <P>SOLUTION: A reinforcing fiber bundle reel-out device 100 has a plurality of collapse prevention members 120 for preventing the collapse of winding layer for pushing the inner peripheral surface of the winding body 11 of the fiber bundle package 10 to the outside, and pushing means 110, 113, 116 for pushing the plurality of collapse prevention member 120 to the inner peripheral surface by following the inner peripheral surface of the winding body 11 where the thickness gradually get thinner as the reinforcing fiber bundle is gradually drawn out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a production method and a production apparatus for continuously producing reinforcing fiber bundles from a fiber bundle package, introducing them into an impregnation die, and producing long fiber reinforced thermoplastic resin pellets by a drawing method.
The present invention

  Long fiber reinforced thermoplastic resin pellets (hereinafter also simply referred to as long fiber reinforced resin pellets) are used as raw materials for injection molding. The long fiber reinforced resin pellet has excellent mechanical strength compared to the short fiber reinforced resin pellet because the pellet length (for example, about 3 to 10 mm) is almost the same as the fiber length.

  A fiber bundle package is used for the production of long fiber reinforced resin pellets. As shown in FIG. 8, the fiber bundle package 10 is obtained by packaging a wound body 11 obtained by winding a reinforcing fiber bundle (roving) into a cylindrical shape, and the outer surface of the wound body 11 is packaged. It is covered with a heat shrink film 12 for use. The reinforcing fiber bundle is a flat string formed by binding strands of a large number of single fibers (filaments) without twisting a predetermined number of strands. In the fiber bundle package 10, the reinforcing fiber bundle is pulled out from the wound body by an internal method. The reinforcing fiber bundle is drawn from the inner peripheral side of the upright wound body 11 and guided upward through the opening of the heat shrink film 12.

  And a long fiber reinforced resin pellet is manufactured using the drawing method. As this drawing method, a drawing method without twisting and a drawing method with twisting are known. In the pellet manufacturing method using the drawing method without twisting, the reinforcing fiber bundle is continuously drawn out from the fiber bundle package and introduced into the impregnation die, and the reinforcing fiber bundle is impregnated with the molten thermoplastic resin by the impregnation die. And continuously pulling out the long fiber reinforced resin strands made of resin impregnated reinforcing fiber bundles from the impregnation die by a take-up machine provided on the downstream side of the impregnation die, and the long fiber reinforced resin strands by a pelletizer or the like. A long fiber reinforced resin pellet is produced by cutting to a predetermined length. FIG. 10 is a schematic diagram showing long fiber reinforced resin pellets obtained by a drawing method without twisting.

  Further, in the pellet manufacturing method using the drawing method for twisting, the reinforcing fiber bundle is continuously drawn out from the inner fiber bundle package, introduced into the impregnation die, and the heat melted into the reinforcing fiber bundle by the impregnation die. A long fiber reinforced resin strand composed of a fiber bundle for reinforcing resin impregnation that has been twisted by the take-up machine from the impregnation die is continuously impregnated with a plastic resin, and a take-up machine provided downstream of the impregnation die. The long fiber reinforced resin strands are cut into a predetermined length by a pelletizer or the like to produce long fiber reinforced resin pellets. In this case, as the take-up machine, one having a function as a twisting machine such as a twisting roller is used. FIG. 9 is a schematic view showing a long fiber reinforced resin pellet obtained by a drawing method for twisting.

  By the way, when manufacturing the long fiber reinforced thermoplastic resin pellet while continuously drawing the reinforcing fiber bundle from the fiber bundle package, the reinforcing fiber bundle is sequentially drawn from the inner peripheral side of the wound body. Therefore, as the reinforcing fiber bundle is pulled out, the thickness of the wound body gradually decreases. When the reinforcing fiber bundle is pulled out to the vicinity of the outermost wound layer of the wound body, the wound layer may collapse and the reinforcing fiber bundle of the wound layer may be tangled. For this reason, the reinforcing fiber bundle is disconnected due to the entanglement, and there is a problem that it is not possible to switch to the new in-coming fiber bundle package joined to the reinforcing fiber bundle. It was.

  In order to prevent the above-described collapse phenomenon of the wound layer, Japanese Patent Application Laid-Open No. 2001-88881 proposes a glass roving package. This glass roving package is a glass roving package in which the outer surface of a glass fiber bundle wound body obtained by winding a glass roving into a cylindrical shape is covered with a bag-like heat shrink film. And the said heat-shrink film is a glass roving package which is formed from a polypropylene resin composition or a polyethylene terephthalate resin composition, and a dynamic friction coefficient is 0.1-0.7. In this glass roving package, the coefficient of dynamic friction of the heat-shrinkable film is set to 0.1 to 0.7 in order to prevent the collapse phenomenon.

However, the above-described glass roving package is not always sufficient in reliably preventing the collapse phenomenon.
JP 2001-88881 A (paragraphs [0009] to [0011], FIG. 1) JP 7-228422 A (paragraph [0019], FIG. 1 and FIG. 2)

  Therefore, the object of the present invention is to continuously draw out the reinforcing fiber bundle from the inner circumference side of the wound body of the fiber bundle package and introduce it into the impregnation die, and draw the long fiber reinforced thermoplastic resin pellets by the drawing method. When manufacturing, even if the reinforcing fiber bundle is pulled out to the vicinity of the outermost wound layer of the wound body, it is possible to prevent the rolled layer reinforcing fiber bundle from being tangled by preventing the collapse of the wound layer. Thus, the reinforcing fiber bundle can be pulled out smoothly to the end, and thereby the new fiber bundle package joined to the reinforcing fiber bundle without breaking the reinforcing fiber bundle due to the entanglement. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus for long fiber reinforced thermoplastic resin pellets which can be switched.

  In order to solve the above problems, the present invention takes the following technical means.

  According to the first aspect of the present invention, the reinforcing fiber bundle is continuously drawn out from the wound body obtained by winding the reinforcing fiber bundle into a cylindrical shape, introduced into the impregnation die, and the heat that is melted into the reinforcing fiber bundle by the impregnation die. A long fiber reinforced resin comprising a resin impregnated reinforcing fiber bundle impregnated with a plastic resin and twisted from the impregnation die or not twisted by a take-up machine provided downstream of the impregnation head In the method of continuously taking up the strands and pelletizing the long fiber reinforced resin strands to produce the long fiber reinforced thermoplastic resin pellets, the roll layer for preventing the collapse of the wound layer for pressing the inner peripheral surface of the wound body to the outside. When a plurality of collapse prevention members are provided and the reinforcing fiber bundle is sequentially pulled out from the inner circumference side from the wound body, before the reinforcing fiber bundle is sequentially pulled out, the thickness gradually decreases. A method for producing a long fiber-reinforced thermoplastic resin pellets, characterized in that following the inner peripheral surface of the rotating winding member presses the plurality of collapse prevention members to the internal peripheral surface.

  In the invention of claim 2, the reinforcing fiber bundle is continuously drawn out from the wound body obtained by winding the reinforcing fiber bundle into a cylindrical shape, introduced into the impregnation die, and the heat melted into the reinforcing fiber bundle by the impregnation die. A long fiber reinforced resin comprising a resin impregnated reinforcing fiber bundle impregnated with a plastic resin and twisted from the impregnation die or not twisted by a take-up machine provided downstream of the impregnation head In a device for continuously taking up a strand and pelletizing the long fiber reinforced resin strand to produce a long fiber reinforced thermoplastic resin pellet, a reinforcing fiber bundle is sequentially drawn from the inner circumference side from the wound body. A fiber bundle feeding device, and the reinforcing fiber bundle feeding device includes a plurality of collapse prevention members for preventing the collapse of the wound layer for pressing the inner peripheral surface of the wound body to the outside; And pressing means for pressing the plurality of collapse preventing members against the inner peripheral surface following the inner peripheral surface of the wound body, the thickness of which is gradually reduced as the bundle is sequentially drawn out. It is a manufacturing apparatus of a long fiber reinforced thermoplastic resin pellet.

  The invention of claim 3 is the long fiber reinforced thermoplastic resin pellet manufacturing apparatus according to claim 2, wherein each of the collapse preventing members is a rod-shaped collapse preventing rod extending over the entire length in the height direction of the wound body, The pressing means includes a support column and a plurality of collapsible prevention rods that are vertically arranged vertically with the wound body on the inner side of the wound body when the wound body is mounted. A link mechanism that includes a plurality of links, one end of which is pin-coupled to the support column and the other end of which is pin-coupled to the collapse-preventing rod. It is characterized by being constructed.

  In the method or apparatus for producing a long fiber reinforced thermoplastic resin pellet of the present invention, the thickness of the reinforcing fiber bundle is gradually reduced as the reinforcing fiber bundle is sequentially drawn out from the inner circumference side of the wound body. A plurality of collapse preventing members are pressed against the inner peripheral surface following the inner peripheral surface of the wound body. Therefore, even if the reinforcing fiber bundle is pulled out to the vicinity of the outermost wound layer of the wound body, it is possible to prevent the wound fiber layer from being tangled by preventing the roll layer from collapsing. Therefore, without causing breakage of the reinforcing fiber bundle due to the entanglement, it is possible to switch to a new wound body joined to the reinforcing fiber bundle, and continuously reinforce long fibers for a long time. Production of thermoplastic resin pellets can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of an apparatus for producing long fiber reinforced thermoplastic resin pellets according to an embodiment of the present invention.

  In FIG. 1, 100 is a reinforcing fiber bundle feeding device. The reinforcing fiber bundle feeding device 100 sequentially draws the reinforcing fiber bundle R from the wound body 11 of the attached fiber bundle package 10 from its inner peripheral side.

  As shown in FIG. 1, a plurality of reinforcing fiber bundles R (three in the example of FIG. 1) drawn out from the wound body 11 of the fiber bundle package 10 are aligned to form a pair of heating rollers. It is led to a preheating heating device 21 provided with 22A and 22B. The reinforcing fiber bundle R is heated by the preheating heating device 21 and then guided into the impregnation die 23. A molten resin (molten thermoplastic resin) 28 is continuously supplied to the impregnation die 23 from an extruder 26 incorporating a screw 27. In the impregnation die 23, a plurality of impregnation rollers 25 for impregnating the reinforcing fiber bundle R with the molten resin 28 are disposed. A die nozzle 24 is attached to the outlet of the impregnation die 23 to determine the wire diameter of the long fiber reinforced resin strand S having a circular cross section made of a twisted resin impregnated reinforcing fiber bundle.

  The reinforcing fiber bundle R is impregnated with the molten resin while passing through the impregnation die 23 to form a resin impregnated reinforcing fiber bundle. This resin impregnated reinforcing fiber bundle is twisted by the twisting rollers 30 </ b> A and 30 </ b> B provided on the downstream side of the impregnation die 23. The twisting rollers 30A and 30B function as a take-up machine and a twisting machine. And the long fiber reinforced resin strand S which consists of the fiber bundle for resin impregnation reinforcement | strengthening to which twist was provided is continuously taken out from the impregnation die | dye 23 by the twist rollers 30A and 30B.

  The high-temperature long fiber reinforced resin strand S drawn from the die nozzle 24 of the impregnation die 23 is cooled and hardened by the cooling water tank 29 and guided to the twisting rollers 30A and 30B. Then, the long fiber reinforced resin strand S guided to the downstream side of the twisting rollers 30A and 30B is cut into a predetermined length by the pelletizer 31 to be a long fiber reinforced resin pellet.

  FIG. 2 is an explanatory view of the twisting roller in FIG. As shown in FIG. 2, the pair of twisting rollers 30A and 30B has their respective rotation axes held on parallel planes (horizontal planes) and reinforced with long fibers from the upstream side in a state where the rotation axes are crossed. The resin strands S are arranged to face each other. That is, the rotation axis a of the upper twisting roller 30A and the rotation axis of the lower twisting roller 30B in FIG. 2 are in a direction opposite to each other with respect to the take-up direction of the long fiber reinforced resin strand S in plan view, and The direction is set to be the same angle but shifted by a predetermined angle (twist angle).

  Next, the reinforcing fiber bundle feeding device 100 will be described.

  3 is a diagram showing the configuration of the reinforcing fiber bundle feeding device in FIG. 1, FIG. 4 is a plan view showing the base plate in FIG. 3, and FIG. 5 shows the configuration of the main part of the reinforcing fiber bundle feeding device shown in FIG. It is a top view. In FIG. 3, the heat shrink film 12, the umbrella-shaped guide 104, and the lifting prevention metal fitting 106 of the fiber bundle package 10 are not illustrated.

  3 to 5, reference numeral 101 denotes a disk-shaped base plate. A support leg 103 having a predetermined length and contacting the floor surface is attached to the base plate 101. A column 110 having an upper hub 111 and a lower hub 112 is erected vertically on the base plate 101. Reference numeral 104 denotes a bracket that is fixed to the center position of the upper surface of the base plate 101 and supports the support 110. A support column 110 is detachably fixed to the bracket 104. In a state where the fiber bundle package 10 is placed on the base plate 101, the fiber bundle package 10 (the wound body 11) and the support 110 are positioned on the same axis.

  Reference numeral 120 denotes a collapse prevention rod made of a hollow pipe. In this embodiment, a total of four collapse prevention rods 120 are provided which are located at positions equally divided at an angle of 90 ° on the same circumference centering on the support 110 (see FIG. 5). The collapse prevention rod 120 extends over the entire length of the wound body 11 in the height direction. In order to prevent the reinforcing fiber bundle R drawn from the wound body 11 from being caught on the collapse preventing rod 120, the upper end portion of the collapse preventing rod 120 is curved inward. These four collapse prevention rods 120 constitute a collapse prevention member for preventing the collapse of the wound layer for pressing the inner peripheral surface of the wound body 11 outward. The number of collapsible prevention rods 120 is preferably 2 or more, and preferably 4 to 8.

  113 is an upper link and 116 is a lower link. For each of the four collapse prevention rods 120, one end of the upper link 113 is coupled to the upper hub 111 of the column 110 by a pin 114, and the other end is coupled to the upper portion of the collapse prevention rod 120 by a pin 115. Further, for each of the four collapse prevention rods 120, one end of the lower link 116 is coupled to the lower hub 112 of the support column 110 by a pin 117, and the other end is coupled to the lower portion of the collapse prevention rod 120 by a pin 118. Yes.

  In this way, for each of the four collapse prevention rods 120, a link mechanism is configured in which the collapse prevention rod 120 moves in parallel with the weight of the links 113 and 116 with respect to the fixed column 110. The collapse prevention rod 120 is supported by links 113 and 116 such that the lower end of the collapse prevention rod 120 always passes through the long hole 102 (see FIGS. 3 and 4) formed in the base plate 101.

  The strut 110 and the four sets of links 113 and 116 follow the inner peripheral surface of the wound body 11 that gradually decreases in thickness as the reinforcing fiber bundle R is sequentially pulled out, and four collapses occur on the inner peripheral surface. A pressing means for pressing the prevention rod 120 is configured.

  6 is a perspective view showing a state in which the reinforcing fiber bundle is pulled out from the wound body in the reinforcing fiber bundle feeding device shown in FIG. 3, and FIG. 7 is a cross-sectional view showing the lifting prevention metal fitting in FIG.

  In FIG. 6, reference numeral 105 denotes an umbrella-shaped guide. The umbrella-shaped guide 105 has a rod-shaped part and an umbrella part. As for the umbrella-shaped guide 105 in the standing posture, the lower end of the rod-like portion is detachably fixed to the upper end of the column 110. The reinforcing fiber bundle R drawn out from the wound body 11 is guided upward while in contact with the circular peripheral edge of the umbrella portion of the umbrella-shaped guide 105. While the reinforcing fiber bundle R is being pulled out, the size of the umbrella portion of the umbrella-shaped guide 105 is such that the circumferential edge of the umbrella portion is positioned radially outward from the upper end portion of the collapse preventing member (such as a collapse preventing rod). Is set. The umbrella portion of the umbrella-shaped guide 105 is not limited to the conical plate shape (umbrella shape) protruding upward from the outer peripheral portion toward the center portion, but may be a disk shape.

  6 and 7, reference numeral 106 denotes a lifting prevention metal fitting. In this embodiment, the lifting prevention metal fitting 106 is located outside the fiber bundle package 10, extends in the height direction of the fiber bundle package 10, is connected to the rod part, and is formed on the upper surface of the fiber bundle package 10. And a head portion that presses the vicinity of the peripheral portion from above in a part of the peripheral portion. The head portion has a C shape in plan view. The two lifting prevention metal fittings 106 are respectively inserted into bosses 107 fixed to the base plate 101 and fixed to the bosses 107 with fixing bolts 108. Some fiber bundle packages 10 have the heat shrink film 12 attached to the reinforcing fiber bundle R of the outermost wound layer. For this reason, the reinforcing fiber bundle R of the outermost winding layer may be pulled out together with the heat shrink film 12. In order to prevent this, a lifting prevention metal fitting 106 is provided. It is preferable to provide the anti-lifting metal fitting 106 at a position that does not interfere with the collapsing prevention rod 120 and at least two positions on the peripheral edge of the upper surface of the fiber bundle package 10.

  In the reinforcing fiber bundle feeding device 100 configured as described above, the fiber bundle package 10 is first mounted. In addition, before mounting | wearing, the heat-shrink film 12 of the part which covers the upper and lower surfaces of the winding body 11 is removed previously, and the fiber bundle package 10 by which the outer peripheral surface of the winding body 11 is coat | covered with the heat-shrink film 12 is carried out. It was used. After removing the umbrella-shaped guide 105 fixed to the column 110, the four collapsing prevention rods 120 are moved to the positions indicated by “A” in FIG. Next, the fiber bundle package 10 is lowered from above the four collapse prevention rods 120 and placed on the base plate 101 in a state where the fiber bundle package 10 is fitted to the outside of the four collapse prevention rods 120. . Then, the wound body 11 of the fiber bundle package 10 is positioned on the same axis as the support 110. Moreover, the inner peripheral surface of the wound body 11 is in a state of being pressed outward in the radial direction by the four collapse prevention rods 120. As described above, when the attachment of the fiber bundle package 10 is completed, the umbrella-shaped guide 105 is fixed to the support 110. Further, a lifting prevention metal fitting 106 is attached.

  When the installation of the fiber bundle package 10 is completed, the reinforcing fiber bundle R is sequentially pulled out from the wound body 11 by the operation of the twisting rollers 30A and 30B. As a result, the thickness of the wound body 11 gradually decreases. That is, the inner peripheral surface of the wound body 11 is gradually retracted. The four collapsing prevention rods 120 follow the inner circumferential surface of the winding body 11 that is gradually retracted by the link mechanism described above, and are always pressed against the inner circumferential surface.

  Here, as described above, the outer peripheral surface of the wound body 11 attached to the reinforcing fiber bundle feeding device is covered with the heat shrink film 12. And the winding layer of the wound body 11 after mounting | wearing is the state pinched | interposed into the heat shrink film 12 and the collapsing prevention rod 120 in four places in the circumferential direction in this embodiment. Thus, the four collapse prevention rods 120 pressed against the inner peripheral surface of the wound body 11 can be firmly supported so as not to collapse the wound layer of the wound body 11. When the pressing force can be continuously applied toward the inner peripheral surface of the wound body 11, the heat shrink film 12 may be completely removed from the wound body 11.

  Even if the reinforcing fiber bundle R is pulled out and the reinforcing fiber bundle R is pulled out to the vicinity of the outermost wound layer of the wound body 11 (the positions of the four collapsing prevention rods 120 at this time are illustrated). 3), and the reinforcing fiber bundle R of the wound layer that has collapsed can be prevented from being tangled. Therefore, without causing disconnection of the reinforcing fiber bundle R due to the entanglement in the pass line that leads the reinforcing fiber bundle R to the impregnation die 23, the new wound body joined to the reinforcing fiber bundle R can be connected to the new wound body. Switching can be performed, and a continuous fiber reinforced thermoplastic resin pellet can be manufactured continuously for a long time.

  In the present invention, a plurality of curved plate-like bodies may be used in place of the plurality of collapse prevention rods 120 as the plurality of collapse prevention members. The curved plate-like body has an outer surface shape corresponding to the curved shape of the inner peripheral surface of the wound body 11. In the present invention, an air cylinder or an electric linear actuator may be used as the pressing means for pressing the collapsing prevention rod 120. When an air cylinder or an electric linear motion actuator is used, there is an advantage that the pressing force can be kept constant from the fully wound fiber bundle to just before the idle winding.

  Next, examples of the present invention will be described. A production experiment of long fiber reinforced resin pellets was performed using the production apparatus shown in FIG. 1 and the reinforcing fiber bundle feeding apparatus shown in FIGS. 3 to 7 was evaluated. A glass fiber bundle was used as the reinforcing fiber bundle. The specification (configuration) of the glass fiber bundle per one is a glass fiber diameter (filament diameter) of 17 μm and a weight of 2400 g / km. Even if the fiber bundle package is made of glass fiber bundles with the same specifications, there is a difference in the likelihood of collapse of the wound layer depending on the manufacturer, so two types of fiber bundle packages (fibers) with different manufacturers Bundles A and B) were used. The dimensions of the fiber bundle package are an outer diameter: φ300 mm, an inner diameter: φ150 mm, and a height: 330 mm. In addition, the part of the heat shrink film covering the upper and lower surfaces of the wound body was removed, and the fiber bundle package in which the outer peripheral surface of the wound body was covered with the heat shrink film was used.

  [Example 1] Experimental conditions were: fiber bundle package: 3 pieces, production speed (take-off speed): 80 m / min, thermoplastic resin: polypropylene, fiber content: about 70%, twist angle of twisting roller: 17. The angle was 5 °. As shown in FIG. 1, each of the three fiber bundle packages is attached to a reinforcing fiber bundle feeding device. Then, a total of three reinforcing fiber bundles drawn from each of the three fiber bundle packages were introduced into the impregnation die via a pass line.

  As a result, in the case of the fiber bundle package A, a total of 10 fiber bundle package switching experiments were performed, and switching could be performed without causing any disconnection 10 times. Further, in the case of the fiber bundle package B, the fiber bundle package was switched 10 times in total, and the switching could be performed without causing any disconnection 10 times.

  [Comparative Example 1] Experimental conditions are the same as in Example 1. A reinforcing fiber bundle feeding device without a collapsing prevention member and pressing means was used. As a result, in the case of the fiber bundle package A, a total of 10 fiber bundle package switching experiments were performed, and switching was possible only 8 times without causing disconnection. In the case of the fiber bundle package B, the fiber bundle package was switched 10 times in total, and the switching could be performed without disconnection only three times.

It is a figure which shows the whole structure of the manufacturing apparatus of the long fiber reinforced thermoplastic resin pellet by one Embodiment of this invention. It is explanatory drawing of the twist roller in FIG. It is a figure which shows the structure of the fiber bundle delivery apparatus for reinforcement in FIG. FIG. 4 is a plan view showing a base plate in FIG. 3. It is a top view which shows the structure of the principal part of the fiber bundle delivery apparatus for reinforcement shown in FIG. It is a perspective view which shows a mode that the fiber bundle for reinforcement is pulled out from a winding body in the fiber bundle delivery apparatus for reinforcement shown in FIG. It is sectional drawing which shows the lifting prevention metal fitting in FIG. It is sectional drawing which shows the structure of a fiber bundle package schematically. It is a schematic diagram which shows the long fiber reinforced resin pellet obtained by the drawing method which performs twisting. It is a schematic diagram which shows the long fiber reinforced resin pellet obtained by the drawing method which does not twist.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Fiber bundle package 11 ... Rolled body 12 ... Heat-shrink film 21 ... Preheating heating device 23 ... Impregnation die 24 ... Die nozzle 26 ... Extruder 25 ... Impregnation roller 28 ... Molten resin 29 ... Cooling water tank 30A, 30B ... Twist Roller 31 ... Pelletizer 100 ... Reinforcing fiber bundle feeding device 101 ... Base plate 102 ... Long hole 103 ... Support leg 104 ... Bracket 105 ... Umbrella guide 106 ... Lifting prevention metal fitting 110 ... Post 111 ... Upper hub 112 ... Lower hub 113 ... Upper Link 114, 115 ... Pin 116 ... Lower link 117, 118 ... Pin 120 ... Collapse prevention rod R ... Fiber bundle for reinforcement S ... Long fiber reinforced resin strand

Claims (3)

The reinforcing fiber bundle is continuously drawn out from a wound body obtained by winding the reinforcing fiber bundle into a cylindrical shape and introduced into the impregnation die, and the reinforcing fiber bundle is impregnated with the molten thermoplastic resin by the impregnation die, By a take-up machine provided on the downstream side of the impregnation head, continuous fiber reinforced resin strands composed of a bundle of resin impregnated reinforcing fibers that have been twisted or untwisted from the impregnation die are continuously drawn, In the method of pelletizing this long fiber reinforced resin strand to produce a long fiber reinforced thermoplastic resin pellet,
Provided with a plurality of collapse prevention members for preventing collapse of the winding layer for pressing the inner peripheral surface of the wound body to the outside, when reinforcing fiber bundles are sequentially pulled out from the inner periphery side of the wound body, reinforcing fibers Production of long fiber reinforced thermoplastic resin pellets, wherein the plurality of collapse prevention members are pressed against the inner peripheral surface following the inner peripheral surface of the wound body, the thickness of which gradually decreases as the bundle is sequentially drawn out Method. The reinforcing fiber bundle is continuously drawn out from a wound body obtained by winding the reinforcing fiber bundle into a cylindrical shape and introduced into the impregnation die, and the reinforcing fiber bundle is impregnated with the molten thermoplastic resin by the impregnation die, By a take-up machine provided on the downstream side of the impregnation head, continuous fiber reinforced resin strands composed of a bundle of resin impregnated reinforcing fibers that have been twisted or untwisted from the impregnation die are continuously drawn, In an apparatus for producing a long fiber reinforced thermoplastic resin pellet by pelletizing this long fiber reinforced resin strand,
A reinforcing fiber bundle feeding device is provided that sequentially pulls out reinforcing fiber bundles from the inner circumferential side of the wound body, and the reinforcing fiber bundle feeding device presses the inner circumferential surface of the wound body outward. A plurality of collapse prevention members for preventing the collapse of the winding layer, and the plurality of collapse prevention members on the inner peripheral surface following the inner peripheral surface of the wound body, the thickness of which gradually decreases as the reinforcing fiber bundle is pulled out sequentially. And a pressing means for pressing the long fiber reinforced thermoplastic resin pellet manufacturing apparatus.   Each of the collapsing prevention members comprises a rod-shaped collapsing prevention rod extending over the entire length of the wound body, and the pressing means is disposed on the inner side of the wound body when the wound body is mounted. For each of the pillars that are positioned on the same axis as the winding body and are vertically erected and the plurality of collapse prevention rods, one end is pin-coupled to the pillars and the other end is pin-coupled to the collapse prevention rods. A long-fiber-reinforced thermoplastic resin pellet according to claim 2, comprising a plurality of links, and a link mechanism configured to move each collapsing prevention rod in parallel with respect to the support column. apparatus.

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