JP2015009288A - Fiber-reinforced resin cutting device - Google Patents

Fiber-reinforced resin cutting device Download PDF

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JP2015009288A
JP2015009288A JP2013134363A JP2013134363A JP2015009288A JP 2015009288 A JP2015009288 A JP 2015009288A JP 2013134363 A JP2013134363 A JP 2013134363A JP 2013134363 A JP2013134363 A JP 2013134363A JP 2015009288 A JP2015009288 A JP 2015009288A
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fiber
reinforced resin
cut
fiber reinforced
cutting device
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JP5762473B2 (en
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大吾 佐賀
Daigo Saga
大吾 佐賀
淳 柿崎
Atsushi Kakizaki
淳 柿崎
俊文 大橋
Toshifumi Ohashi
俊文 大橋
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Japan Steel Works Ltd
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Japan Steel Works Ltd
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Priority to PCT/JP2014/066787 priority patent/WO2014208576A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/60—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles

Abstract

PROBLEM TO BE SOLVED: To provide a fiber-reinforced resin cutting device capable of suitably achieving the cutting of a fiber-reinforced thermoplastic resin composition including a reinforced fiber being a comparatively long fiber where a molten thermoplastic resin extruded from an extruder is in a state still uncured.SOLUTION: In a fiber-reinforced resin cutting device 10 comprising: upper and lower stationary knives 13 which are vertically movable and where a fiber-reinforced resin 25 extruded forward from an extruder is sandwiched and fixed; upper and lower cutting knives 15 which are vertically movable and where the sandwiched fiber-reinforced resin 25 is moved and cut along the respective front surfaces of the upper and lower stationary knives 13; and a moving means 17 which is movable forward and backward and where the upper and lower cutting knives 15 in a cut state are moved forward. The fiber-reinforced resin is ripped off and cut to be a predetermined length.

Description

本発明は、押し出されて未だ溶融熱可塑性樹脂が固化していない繊維強化熱可塑性樹脂組成物の切断に使用される繊維強化樹脂切断装置に関する。   The present invention relates to a fiber reinforced resin cutting device used for cutting a fiber reinforced thermoplastic resin composition which has been extruded and a molten thermoplastic resin has not yet solidified.

押出機により連続的に押し出された繊維強化熱可塑性樹脂組成物は、一般的に切断できる程度に固化された後、ペレタイザーなどにより切断されてペレット化され、その後射出成形などに供されている。   The fiber reinforced thermoplastic resin composition continuously extruded by an extruder is generally solidified to such an extent that it can be cut, then cut by a pelletizer or the like and pelletized, and then subjected to injection molding or the like.

例えば、特許文献１に、押出機により押し出された炭素繊維に反芳香族ポリアミド樹脂を含浸させたストランドを冷却槽により冷却・固化させた後、ペレタイザーで切断する方法が記載されている。特許文献２に、強化用連続炭素繊維に酸基含有ポリオレフィン系樹脂を引き抜き法により含浸させて得られた繊維強化熱可塑性樹脂組成物を切断可能な温度まで冷却した後切断するとの記載がある。   For example, Patent Document 1 describes a method in which a strand obtained by impregnating a carbon fiber extruded by an extruder with an anti-aromatic polyamide resin is cooled and solidified by a cooling tank and then cut by a pelletizer. Patent Document 2 describes that a fiber-reinforced thermoplastic resin composition obtained by impregnating a reinforcing continuous carbon fiber with an acid group-containing polyolefin resin by a drawing method is cooled to a cuttable temperature and then cut.

特開2011-245755号公報JP 2011-245755 A 特開2011-63029号公報JP 2011-63029 A

特許文献１又は２に示されるように、繊維強化熱可塑性樹脂組成物がストランドのようなものである場合は、成形された繊維強化熱可塑性樹脂組成物を切断可能な程度に冷却・固化した後、工具鋼又はダイヤモンド製の切断刃を用いたペレタイザーなどにより容易に切断することができる。しかしながら、繊維強化熱可塑性樹脂組成物が炭素繊維を含有するものであってその容量が大きなものである場合は、切断刃の損傷が問題になる。   As shown in Patent Document 1 or 2, when the fiber-reinforced thermoplastic resin composition is like a strand, the molded fiber-reinforced thermoplastic resin composition is cooled and solidified to such an extent that it can be cut. It can be easily cut by a pelletizer using a cutting blade made of tool steel or diamond. However, when the fiber-reinforced thermoplastic resin composition contains carbon fibers and has a large capacity, damage to the cutting blade becomes a problem.

一方、押出機から押し出された繊維強化熱可塑性樹脂組成物は、作業効率やエネルギー効率の観点から、一旦冷却・固化することなく高温状態のままで次の加工工程に持ち込まれるのが望ましい場合がある。このような場合に、繊維強化熱可塑性樹脂組成物が高温状態にあって強化繊維が短小である場合は、強化繊維は切断されるというより押出機側又は切断される側のいずれかに分塊されるので、繊維強化熱可塑性樹脂組成物の切断は容易である。しかしながら、繊維強化熱可塑性樹脂組成物の強化繊維が長大である場合は、繊維強化熱可塑性樹脂組成物の切断は容易ではない。   On the other hand, the fiber reinforced thermoplastic resin composition extruded from the extruder may be desirably brought into the next processing step in a high temperature state without being cooled and solidified from the viewpoint of work efficiency and energy efficiency. is there. In such a case, when the fiber reinforced thermoplastic resin composition is in a high temperature state and the reinforcing fiber is short and small, the reinforcing fiber is not cut but is divided into either the extruder side or the cut side. Therefore, the fiber-reinforced thermoplastic resin composition can be easily cut. However, when the reinforcing fiber of the fiber reinforced thermoplastic resin composition is long, it is not easy to cut the fiber reinforced thermoplastic resin composition.

本発明は、このような従来の問題点に鑑み、押出機から押し出され未だ溶融熱可塑性樹脂が固化していない状態の繊維強化熱可塑性樹脂組成物（繊維強化樹脂）、なかでも比較的長繊維の強化繊維を含むものの切断を好適に行うことができる繊維強化樹脂切断装置を提供することを目的とする。   In view of such conventional problems, the present invention is a fiber reinforced thermoplastic resin composition (fiber reinforced resin) that is extruded from an extruder and the molten thermoplastic resin is not yet solidified. It aims at providing the fiber reinforced resin cutting device which can perform suitably the cutting | disconnection of what contains these reinforced fibers.

本発明に係る繊維強化樹脂切断装置は、押出機から前方に押し出される繊維強化樹脂を挟み込んで固定する上下動可能な上及び下固定刃と、この挟み込まれた繊維強化樹脂を前記上又は下固定刃の前面に沿ってそれぞれ移動して切り込む上下動可能な上及び下切断刃と、その切り込んだ状態の上及び下切断刃を前方に移動させる前後進可能な移動手段とを有し、前記繊維強化樹脂を引きちぎって所定長さに切断してなる。   The fiber reinforced resin cutting device according to the present invention includes a vertically movable upper and lower fixed blade that sandwiches and fixes a fiber reinforced resin extruded forward from an extruder, and the upper or lower fixed fiber reinforced resin that is sandwiched between the upper and lower fixed blades. An upper and lower cutting blade capable of moving up and down and moving along the front surface of the blade, and a moving means capable of moving forward and backward to move the upper and lower cutting blades in the cut state forward; The reinforced resin is torn and cut into a predetermined length.

上記発明において、上及び下切断刃は、一方が鋸刃状の歯を有し、他方が歯を有しない平板状であるものがよい。この上及び下切断刃は、食い違うように切り込むことができるようにすることができる。   In the above invention, the upper and lower cutting blades preferably have a flat plate shape in which one has saw-toothed teeth and the other has no teeth. The upper and lower cutting blades can be cut so as to conflict.

また、繊維強化樹脂に含有される強化繊維は炭素繊維とすることができる。繊維強化樹脂に含有される炭素繊維の繊維長が、１mm以上の場合に、本発明に係る繊維強化樹脂切断装置を好適に使用することができる。   The reinforcing fiber contained in the fiber reinforced resin can be a carbon fiber. When the fiber length of the carbon fiber contained in the fiber reinforced resin is 1 mm or more, the fiber reinforced resin cutting device according to the present invention can be suitably used.

また、本発明に係る繊維強化樹脂切断装置は、切断された繊維強化樹脂を受け取り、その受け取った繊維強化樹脂を所定位置に排出する移動台を有するものが好ましい。   Moreover, it is preferable that the fiber reinforced resin cutting device according to the present invention has a moving table that receives the cut fiber reinforced resin and discharges the received fiber reinforced resin to a predetermined position.

本発明によれば、押出機から押し出された溶融熱可塑性樹脂が未だ固化していない状態の比較的長繊維の強化繊維を含む繊維強化樹脂（繊維強化熱可塑性樹脂組成物）の切断を容易に行うことができる。   According to the present invention, it is easy to cut a fiber reinforced resin (fiber reinforced thermoplastic resin composition) containing relatively long fiber reinforced fibers in a state where the molten thermoplastic resin extruded from the extruder has not yet solidified. It can be carried out.

本発明に係る繊維強化樹脂切断装置の構成と作動を示す模式図である。It is a mimetic diagram showing composition and operation of a fiber reinforced resin cutting device concerning the present invention. 図１の繊維強化樹脂切断装置の上及び下切断刃を示す模式図である。It is a schematic diagram which shows the upper and lower cutting blade of the fiber reinforced resin cutting device of FIG. 繊維強化樹脂の切断試験を行った結果を示す図面である。It is drawing which shows the result of having performed the cutting test of fiber reinforced resin.

以下、本発明を実施するための形態について図面を基に説明する。図１は、本発明に係る繊維強化樹脂切断装置の構成と作動を示す模式図である。本繊維強化樹脂切断装置10は、図１（ａ）に示すように、押出機20から前方に押し出される繊維強化樹脂25を挟み込んで固定する上下動可能な上及び下固定刃13（13A、13B）と、この挟み込まれた繊維強化樹脂25を上又は下固定刃13の前面に沿ってそれぞれ移動して切り込む上下動可能な上及び下切断刃15（15A、15B）と、その切り込んだ状態の上及び下切断刃15を前方に移動させる前後進可能な移動手段17とを有している。この移動手段17を前方に移動することによって、繊維強化樹脂25を所定長さに引きちぎって切断することができる。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration and operation of a fiber reinforced resin cutting device according to the present invention. As shown in FIG. 1 (a), the fiber reinforced resin cutting device 10 includes upper and lower fixed blades 13 (13A, 13B) that are movable up and down to sandwich and fix a fiber reinforced resin 25 pushed forward from an extruder 20. ), And upper and lower cutting blades 15 (15A, 15B) capable of moving up and down to move and cut the sandwiched fiber reinforced resin 25 along the front surface of the upper or lower fixed blade 13, respectively. And moving means 17 capable of moving forward and backward to move the upper and lower cutting blades 15 forward. By moving the moving means 17 forward, the fiber reinforced resin 25 can be cut to a predetermined length.

上及び下固定刃13（13A、13B）は、上固定刃13A、下固定刃13Bをそれぞれ上下動させ又所定位置に停止・固定させることができるようになっており、所定間隔で押出機20から前方に押し出される繊維強化樹脂25を所定の強さで挟み込んで固定することができるようになっている。上固定刃13A、下固定刃13Bの相対する部分は、繊維強化樹脂25を挟み込み・固定できる形状であればよく、平板状とすることができる。   The upper and lower fixed blades 13 (13A, 13B) can move the upper fixed blade 13A and the lower fixed blade 13B up and down, and can be stopped and fixed at predetermined positions. The fiber reinforced resin 25 pushed forward from the front can be sandwiched and fixed at a predetermined strength. The opposing portions of the upper fixed blade 13A and the lower fixed blade 13B may have a shape that can sandwich and fix the fiber reinforced resin 25, and may have a flat plate shape.

上及び下切断刃15（15A、15B）は、上切断刃15A、下切断刃15Bをそれぞれ上下動させ又所定位置に停止・固定させることができるようになっており、上切断刃15Aは上固定刃13Aに沿って上下動し、下切断刃15Bは下固定刃13Bに沿って上下動するようになっている。上切断刃15A又は下切断刃15Bの何れかは、繊維強化樹脂25を容易に切り込むことができるように鋸刃状の歯を有するのがよい（図２）。上切断刃15Aと下切断刃15Bは、相互に対向して近接できるようになっていればよく、図２に示すように、食い違うように切り込むことができるようにすることができる。上切断刃15Aと下切断刃15Bが、食い違うように切り込むことができるようになっていると、繊維長の長い強化繊維を含有する繊維強化樹脂25の切断を確実に行うことができ、また、上切断刃15Aと下切断刃15Bの位置制御が容易である。繊維に剛性がある場合は長繊維になることでスプリングバックにより、吐出口の高さより厚くなることが有るので、上切断刃15A、下切断刃15Bの上下動の可動域は吐出口の高さの２倍以上を確保しておくことが望ましい。   The upper and lower cutting blades 15 (15A, 15B) can move the upper cutting blade 15A and the lower cutting blade 15B up and down, and can be stopped and fixed at predetermined positions. The lower cutting blade 15B is moved up and down along the fixed blade 13A, and the lower cutting blade 15B is moved up and down along the lower fixed blade 13B. Either the upper cutting blade 15A or the lower cutting blade 15B may have saw-tooth teeth so that the fiber reinforced resin 25 can be easily cut (FIG. 2). The upper cutting blade 15A and the lower cutting blade 15B are only required to be close to each other so as to be close to each other. As shown in FIG. When the upper cutting blade 15A and the lower cutting blade 15B can be cut so as to be inconsistent, it is possible to reliably cut the fiber reinforced resin 25 containing the reinforcing fiber having a long fiber length, Position control of the upper cutting blade 15A and the lower cutting blade 15B is easy. If the fibers are stiff, the length of the upper cutting blade 15A and the lower cutting blade 15B can be moved up and down by the springback due to the use of long fibers. It is desirable to secure at least twice as large as the above.

移動手段17は、上及び下固定刃13で固定され、上及び下切断刃15に切り込まれた状態の繊維強化樹脂25において、上及び下切断刃15を前方に移動させることができ、繊維強化樹脂25を引きちぎって切断することができるようになっていればよい。移動手段17の作動タイミング、移動量は、適宜決めることができるようになっている。   The moving means 17 can move the upper and lower cutting blades 15 forward in the fiber reinforced resin 25 fixed by the upper and lower fixed blades 13 and cut into the upper and lower cutting blades 15. It is only necessary that the reinforced resin 25 can be torn and cut. The operation timing and movement amount of the moving means 17 can be determined as appropriate.

繊維強化樹脂25の切断された部分は、これを受け取り、その受け取った切断部分を所定位置に排出することができる移動台28を有するのがよい。   The cut portion of the fiber reinforced resin 25 preferably has a movable table 28 that can receive the cut portion and discharge the received cut portion to a predetermined position.

押出機20は、公知の押出機を使用することができる。繊維強化樹脂25は、繊維長が1mm以上の炭素繊維を含有するものがよい。このような繊維強化樹脂25は、切断が容易でないからである。すなわち、本繊維強化樹脂切断装置10は、繊維長が1mm以上の炭素繊維を含有する繊維強化樹脂25の切断に使用される。本繊維強化樹脂切断装置10は、好ましくは、繊維長が1〜30mm以下の炭素繊維を含有する繊維強化樹脂25の切断に使用される。   As the extruder 20, a known extruder can be used. The fiber reinforced resin 25 preferably contains carbon fibers having a fiber length of 1 mm or more. This is because such fiber reinforced resin 25 is not easily cut. That is, the fiber reinforced resin cutting device 10 is used for cutting the fiber reinforced resin 25 containing carbon fibers having a fiber length of 1 mm or more. The fiber reinforced resin cutting device 10 is preferably used for cutting a fiber reinforced resin 25 containing carbon fibers having a fiber length of 1 to 30 mm or less.

以下に、この繊維強化樹脂切断装置10により繊維強化樹脂25を切断する工程について説明する。図１（ａ）に示すように押出機から押し出された繊維強化樹脂25は、図１（ｂ）に示すように、上及び下固定刃13で固定され、上及び下切断刃15に切り込まれる。次に、図１（ｃ）に示すように、この繊維強化樹脂25に切り込んだ上及び下切断刃15を前方に移動させる。これによって、繊維強化樹脂25は引きちぎられるように切断される。次に、上及び下切断刃15を上下動させると、引きちぎられた繊維強化樹脂25の切断部分は、移動台により受け取られ、所定の位置に排出される（図１（ｄ））。そして、上及び下固定刃13を上下動させ、次のサイクルに備える（図１（ｅ））。   Hereinafter, a process of cutting the fiber reinforced resin 25 by the fiber reinforced resin cutting device 10 will be described. The fiber reinforced resin 25 extruded from the extruder as shown in FIG. 1 (a) is fixed by the upper and lower fixed blades 13 and cut into the upper and lower cutting blades 15 as shown in FIG. 1 (b). It is. Next, as shown in FIG. 1C, the upper and lower cutting blades 15 cut into the fiber reinforced resin 25 are moved forward. Thereby, the fiber reinforced resin 25 is cut so as to be torn off. Next, when the upper and lower cutting blades 15 are moved up and down, the cut portion of the fiber reinforced resin 25 that has been torn off is received by the moving table and discharged to a predetermined position (FIG. 1 (d)). Then, the upper and lower fixed blades 13 are moved up and down to prepare for the next cycle (FIG. 1 (e)).

ポリアミド６樹脂に繊維長の異なる炭素繊維を含有する繊維強化樹脂25の切断試験を行った。繊維強化樹脂25の切断は、本発明に係る繊維強化樹脂切断装置を使用して切断する方法（発明例）と、二軸押出機の吐出口付近で作業員が板厚2ｍｍのステンレス製のへらを使用した手作業で切断する方法（比較例1〜３）により行った。強化繊維樹脂25は、株式会社日本製鋼所製二軸押出機を用い、ポリアミド６樹脂と繊維径7μmの単繊維を束ねたロービング状態の炭素繊維を押し出すことにより作製した。このとき、二軸押出機のスクリュエレメントの構成やスクリュ回転速度を調整し、強化繊維樹脂25に含有される炭素繊維の繊維長を調整した。繊維長は、繊維強化樹脂25を電気炉により550℃で６時間加熱し、樹脂分を焼き飛ばした後、残った炭素繊維を目視により計測した。繊維強化樹脂25の炭素繊維含有率は体積比で30%であった。繊維強化樹脂25の吐出温度は265℃であった。二軸押出機は、吐出口のサイズが幅600×厚さ10（mm）であった。   The fiber reinforced resin 25 containing carbon fibers having different fiber lengths from the polyamide 6 resin was subjected to a cutting test. The fiber reinforced resin 25 is cut using a method (invention example) in which the fiber reinforced resin cutting device according to the present invention is used for cutting, and a stainless steel spatula having a thickness of 2 mm near the discharge port of the twin screw extruder. It was performed by the method of cutting manually (Comparative Examples 1 to 3). The reinforcing fiber resin 25 was produced by extruding a roving carbon fiber obtained by bundling polyamide 6 resin and a single fiber having a fiber diameter of 7 μm, using a twin screw extruder manufactured by Nippon Steel Works. At this time, the configuration of the screw element of the twin screw extruder and the screw rotation speed were adjusted, and the fiber length of the carbon fiber contained in the reinforcing fiber resin 25 was adjusted. The fiber length was measured by visual observation of the remaining carbon fiber after heating the fiber reinforced resin 25 at 550 ° C. for 6 hours in an electric furnace to burn off the resin component. The carbon fiber content of the fiber reinforced resin 25 was 30% by volume. The discharge temperature of the fiber reinforced resin 25 was 265 ° C. In the twin-screw extruder, the discharge port size was 600 width × 10 mm thickness.

図３に、本発明に係る繊維強化樹脂切断装置により繊維強化樹脂25を切断した切断片を示す。この切断片の上下が切断面であり、引きちぎられた様子が観察されるが、切断面は比較的滑らかである。   In FIG. 3, the cut piece which cut | disconnected the fiber reinforced resin 25 with the fiber reinforced resin cutting device which concerns on this invention is shown. The upper and lower sides of the cut piece are cut surfaces, and a torn state is observed, but the cut surface is relatively smooth.

表１に、発明例と比較例の切断結果を示す。へらによる切断は、繊維長が長いほど難しく、繊維長が数mm以上、特に10mmを越えると難しくなることが分かる。繊維長が20mmを越えると、本発明に係る繊維強化樹脂切断装置によらなければ繊維強化樹脂25の切断は困難であることが分かる。   Table 1 shows the cutting results of the invention example and the comparative example. It can be seen that cutting with a spatula is more difficult as the fiber length becomes longer, and becomes difficult when the fiber length exceeds several millimeters, especially 10 mm. When the fiber length exceeds 20 mm, it can be seen that it is difficult to cut the fiber reinforced resin 25 unless the fiber reinforced resin cutting device according to the present invention is used.

Figure 2015009288
Figure 2015009288

10 繊維強化樹脂切断装置
13、13A、13B 上及び下固定刃
15、15A、15B 上及び下切断刃
17 移動手段
20 押出機
25 繊維強化樹脂
28 移動台 10 Fiber reinforced resin cutting device
13, 13A, 13B Upper and lower fixed blades
15, 15A, 15B Upper and lower cutting blades
17 Means of transportation
20 Extruder
25 Fiber reinforced resin
28 Moving platform

Claims (6)

押出機から前方に押し出される繊維強化樹脂を挟み込んで固定する上下動可能な上及び下固定刃と、この挟み込まれた繊維強化樹脂を前記上又は下固定刃の前面に沿ってそれぞれ移動して切り込む上下動可能な上及び下切断刃と、その切り込んだ状態の上及び下切断刃を前方に移動させる前後進可能な移動手段とを有し、前記繊維強化樹脂を引きちぎって所定長さに切断する繊維強化樹脂切断装置。   Up and down movable upper and lower fixed blades that sandwich and fix the fiber reinforced resin extruded forward from the extruder, and the inserted fiber reinforced resin move along the front surface of the upper or lower fixed blade, respectively. It has upper and lower cutting blades that can move up and down, and moving means that can move forward and backward to move the upper and lower cutting blades in the cut state, and tears the fiber reinforced resin to cut it to a predetermined length Fiber reinforced resin cutting device. 上及び下切断刃は、一方が鋸刃状の歯を有し、他方が歯を有しない平板状であることを特徴とする請求項１に記載の繊維強化樹脂切断装置。   The fiber-reinforced resin cutting device according to claim 1, wherein one of the upper and lower cutting blades has a saw-tooth shape and the other has a flat plate shape having no teeth. 上及び下切断刃は、食い違うように切り込むことができるようになっていることを特徴とする請求項２に記載の繊維強化樹脂切断装置。   The fiber-reinforced resin cutting device according to claim 2, wherein the upper and lower cutting blades can be cut in a mutually different manner. 繊維強化樹脂に含有される強化繊維は、炭素繊維であることを特徴とする請求項１〜３の何れか一項に記載の繊維強化樹脂切断装置。   The fiber-reinforced resin cutting device according to any one of claims 1 to 3, wherein the reinforcing fiber contained in the fiber-reinforced resin is a carbon fiber. 繊維強化樹脂に含有される炭素繊維の繊維長は、１mm以上であることを特徴とする請求項４に記載の繊維強化樹脂切断装置。   The fiber reinforced resin cutting device according to claim 4, wherein the fiber length of the carbon fiber contained in the fiber reinforced resin is 1 mm or more. 切断された繊維強化樹脂を受け取り、その受け取った繊維強化樹脂を所定位置に排出する移動台を有することを特徴とする請求項１〜５に記載の繊維強化樹脂切断装置。   The fiber-reinforced resin cutting device according to claim 1, further comprising a moving table that receives the cut fiber-reinforced resin and discharges the received fiber-reinforced resin to a predetermined position.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53154175U (en) * 1977-05-11 1978-12-04
JPS62113514A (en) * 1985-11-13 1987-05-25 Plast Kogaku Kenkyusho:Kk Manufacturing device for composite material
JPH04152016A (en) * 1990-10-17 1992-05-26 O K B Kk Metal tube cutting method
JP2010116428A (en) * 2008-11-11 2010-05-27 Tosoh Corp Method for producing regenerated fibrous filler-reinforced polyphenylene sulfide granule
JP2011063029A (en) * 2010-11-12 2011-03-31 Daicel Chemical Industries Ltd Method for producing heat-treated carbon filament-reinforced resin pellet
JP2011245755A (en) * 2010-05-27 2011-12-08 Teijin Ltd Method for producing resin-impregnated carbon fiber strand and carbon fiber pellet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53154175U (en) * 1977-05-11 1978-12-04
JPS62113514A (en) * 1985-11-13 1987-05-25 Plast Kogaku Kenkyusho:Kk Manufacturing device for composite material
JPH04152016A (en) * 1990-10-17 1992-05-26 O K B Kk Metal tube cutting method
JP2010116428A (en) * 2008-11-11 2010-05-27 Tosoh Corp Method for producing regenerated fibrous filler-reinforced polyphenylene sulfide granule
JP2011245755A (en) * 2010-05-27 2011-12-08 Teijin Ltd Method for producing resin-impregnated carbon fiber strand and carbon fiber pellet
JP2011063029A (en) * 2010-11-12 2011-03-31 Daicel Chemical Industries Ltd Method for producing heat-treated carbon filament-reinforced resin pellet

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