JP5225260B2 - Manufacturing apparatus and manufacturing method of long fiber reinforced thermoplastic resin strand - Google Patents

Manufacturing apparatus and manufacturing method of long fiber reinforced thermoplastic resin strand Download PDF

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JP5225260B2
JP5225260B2 JP2009290830A JP2009290830A JP5225260B2 JP 5225260 B2 JP5225260 B2 JP 5225260B2 JP 2009290830 A JP2009290830 A JP 2009290830A JP 2009290830 A JP2009290830 A JP 2009290830A JP 5225260 B2 JP5225260 B2 JP 5225260B2
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resin
fiber bundle
reinforcing fiber
tank
resin tank
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JP2011131422A (en
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穂高 三浦
直行 多代
猛 長岡
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Kobe Steel Ltd
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    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Reinforced Plastic Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

本発明は、長繊維強化熱可塑性樹脂ストランドの製造装置及び製造方法、さらに詳しくは強化繊維束の内部に熱可塑性樹脂を良好に含浸させることのできる長繊維強化熱可塑性樹脂ストランドの製造装置及び製造方法に関するものである。   The present invention relates to a production apparatus and production method for long fiber reinforced thermoplastic resin strands, and more specifically, a production apparatus and production of long fiber reinforced thermoplastic resin strands that can satisfactorily impregnate a thermoplastic resin into a reinforcing fiber bundle. It is about the method.

繊維強化熱可塑性樹脂（ＦＲＴＰ）は、軽量で高強度であるため、車両や船舶の外装などによく用いられている。特に、繊維強化熱可塑性樹脂の中でも繊維長の長い強化繊維が含有されている長繊維強化熱可塑性樹脂（ＬＦＲＴＰ）は、耐衝撃性や剛性に優れているので、近年は自動車のバンパーやボディに多用されるようになってきている。
このような長繊維強化熱可塑性樹脂の成形に用いられるストランドは、溶融された熱可塑性樹脂浴中にガラスロービングなどの強化繊維束を通過させ、強化繊維束を熱可塑性樹脂浴中から引き抜くことにより、強化繊維束に熱可塑性樹脂が含浸されたものとして形成される。 Since fiber reinforced thermoplastic resin (FRTP) is light and high in strength, it is often used for exteriors of vehicles and ships. In particular, among fiber reinforced thermoplastic resins, long fiber reinforced thermoplastic resin (LFRTP) containing reinforced fibers having a long fiber length is excellent in impact resistance and rigidity. It has come to be used frequently.
A strand used for molding such a long fiber reinforced thermoplastic resin passes a reinforcing fiber bundle such as glass roving through a molten thermoplastic resin bath, and pulls the reinforcing fiber bundle out of the thermoplastic resin bath. The reinforcing fiber bundle is impregnated with a thermoplastic resin.

ところが、溶融された熱可塑性樹脂の溶融粘度が高い場合は、複数の強化繊維を束ねた強化繊維束の内部にまで樹脂が含浸されない場合がある。このように内部に樹脂が十分に含浸されていないストランドは樹脂が含浸しきれなかった部分が空隙として残りやすく、ストランドやこのストランドを所定長さに切断してなるペレットを溶融する際に強化繊維が十分に分散しなくなったり、成型品に気泡が入って成型品の機械的物性や外観を大きく損なうという問題がある。   However, when the melt viscosity of the molten thermoplastic resin is high, the resin may not be impregnated even inside the reinforcing fiber bundle in which a plurality of reinforcing fibers are bundled. In such a strand in which the resin is not sufficiently impregnated, the portion where the resin cannot be completely impregnated tends to remain as voids, and the reinforcing fiber is used when melting the strand or the pellet formed by cutting the strand into a predetermined length. May not be sufficiently dispersed, or air bubbles may enter the molded product, which greatly impairs the mechanical properties and appearance of the molded product.

そこで、例えば特許文献１のように、強化繊維束を溶融粘度が高い樹脂に含浸させる前に、強化繊維束を溶融粘度が低い樹脂に含浸させて強化繊維束の内部に一旦樹脂を十分に含浸させ、その後に溶融粘度が高い樹脂を被覆してストランドを製造する技術が提案されている。   Therefore, for example, as in Patent Document 1, before the reinforcing fiber bundle is impregnated with a resin having a high melt viscosity, the resin having a low melt viscosity is impregnated with the resin having a low melt viscosity, and the inside of the reinforcing fiber bundle is once sufficiently impregnated with the resin. Then, a technique for manufacturing a strand by coating a resin having a high melt viscosity is proposed.

特許第３７７４９５９号公報Japanese Patent No. 3774959

ところで、上述した特許文献１には、溶融粘度が異なる複数の樹脂を相次いで強化繊維束に被覆する方法として、例えば押出機及びダイを用いたコーティング方法やロールまたはバーなどを用いたコーティング方法などが挙げられている。
しかし、特許文献１のコーティング方法は、あくまでも樹脂を強化繊維束に被覆する方法を例示するに過ぎないものであり、実際の現場においてどのようなコーティング装置を用いてどのような手順で複数の樹脂を連続して強化繊維束にコーティングすればよいのかを示すものではない。すなわち、特許文献１の開示内容のみでは、製造現場で溶融粘度が異なる複数の樹脂を相次いで強化繊維束に被覆することは困難であると言わざるを得ない。 By the way, in Patent Document 1 described above, as a method of coating a plurality of resins having different melt viscosities successively on a reinforcing fiber bundle, for example, a coating method using an extruder and a die, a coating method using a roll or a bar, and the like Is listed.
However, the coating method of Patent Document 1 is merely an example of a method of coating a reinforcing fiber bundle with a resin, and a plurality of resins are used in any procedure using any coating apparatus in an actual site. Does not indicate whether the reinforcing fiber bundle should be continuously coated. In other words, it is difficult to say that it is difficult to coat the reinforcing fiber bundles one after another with a plurality of resins having different melt viscosities at the manufacturing site only by the disclosure of Patent Document 1.

本発明は、上述の問題に鑑みてなされたものであり、強化繊維束の内部に熱可塑性樹脂を良好に含浸させて、強化繊維の分散性に優れ且つ気泡のないストランドを実際に製造することができる長繊維強化熱可塑性樹脂ストランドの製造装置及び製造方法を提供することを目的とする。   The present invention has been made in view of the above-mentioned problems, and is a method of actually manufacturing a strand having excellent dispersibility of reinforcing fibers and having no air bubbles by satisfactorily impregnating a thermoplastic resin inside the reinforcing fiber bundle. An object of the present invention is to provide an apparatus and a method for producing a long fiber reinforced thermoplastic resin strand that can be manufactured.

上記課題を解決するため、本発明の長繊維強化熱可塑性樹脂ストランドの製造装置は以下の技術的手段を講じている。
即ち、本発明に係る長繊維強化熱可塑性樹脂ストランドの製造装置は、強化繊維束に含浸される熱可塑性の第１樹脂を溶融状態で貯留する第１樹脂槽と、前記第１樹脂槽での含浸に先立って前記強化繊維束に含浸され且つ前記第１樹脂より溶融粘度が低く設定されている第２樹脂を溶融状態で貯留する第２樹脂槽とを備え、前記第１樹脂槽と第２樹脂槽とは隔壁により隔てられており、前記隔壁には強化繊維束を第２樹脂槽から第１樹脂槽へと抜き出す抜出口が設けられ、前記強化繊維束を第２樹脂槽から抜出口を経由し第１樹脂槽へと引き抜くことで前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させる構成とされていることを特徴とするものである。 In order to solve the above problems, the apparatus for producing a long fiber reinforced thermoplastic resin strand of the present invention employs the following technical means.
That is, the long fiber reinforced thermoplastic resin strand manufacturing apparatus according to the present invention includes a first resin tank for storing a thermoplastic first resin impregnated in a reinforcing fiber bundle in a molten state, and the first resin tank. Prior to impregnation, a second resin tank that is impregnated in the reinforcing fiber bundle and stores in a molten state a second resin that is set lower in melt viscosity than the first resin, the first resin tank and the second resin tank The resin tank is separated by a partition, and the partition is provided with an outlet for extracting the reinforcing fiber bundle from the second resin tank to the first resin tank, and the outlet of the reinforcing fiber bundle from the second resin tank. The reinforcing fiber bundle impregnated with the second resin is impregnated with the first resin by being drawn out to the first resin tank via the first resin tank.

このようにすれば、強化繊維束が第２樹脂槽から抜出口を経由して第１樹脂槽へ引き出されるに際して、強化繊維束は外気（空気）に接触することなく、迅速で直接的且つ連続的に熱可塑性樹脂の含浸処理が続行されることになる。すなわち、第２樹脂槽で強化繊維束に含浸した第２樹脂が固化する前に、強化繊維束は第１樹脂槽に入ることになる。
そして、強化繊維束が第１樹脂槽内を通過する際には、第２樹脂槽で含浸された第２樹脂に対して第１樹脂槽で含浸される第１樹脂が置き換わるか、又は第２樹脂と第１樹脂とが混合・積層する状態となり、結果として、含浸させたい第１樹脂が強化繊維束の内部まで（芯まで）浸透しやすくなる。このように本発明では、強化繊維束の内部にまで熱可塑性樹脂が確実且つ良好に含浸しており、且つ強化繊維の分散性に優れており、また気泡が含まれていないようになった良質のストランドやペレットを製造できる装置を、具体的且つ実現可能なものとして提供することができる。 In this way, when the reinforcing fiber bundle is pulled out from the second resin tank to the first resin tank via the outlet, the reinforcing fiber bundle is rapidly, directly and continuously without contacting the outside air (air). Therefore, the impregnation treatment with the thermoplastic resin is continued. That is, the reinforcing fiber bundle enters the first resin tank before the second resin impregnated in the reinforcing fiber bundle in the second resin tank is solidified.
When the reinforcing fiber bundle passes through the first resin tank, the first resin impregnated in the first resin tank is replaced with the second resin impregnated in the second resin tank, or the second resin tank is impregnated. The resin and the first resin are mixed and laminated, and as a result, the first resin to be impregnated easily penetrates into the reinforcing fiber bundle (up to the core). As described above, in the present invention, the thermoplastic resin is surely and satisfactorily impregnated into the reinforcing fiber bundle, and the dispersibility of the reinforcing fiber is excellent, and the air quality is not included. The apparatus which can manufacture the strand and pellet of this can be provided as what is concrete and realizable.

また、上述の装置構成であれば、例えば、含浸させたい熱可塑性樹脂を貯留する樹脂槽に対し、隔壁を設けて第１樹脂槽と第２樹脂槽とに区画すると共に、この隔壁に対し、強化繊維束を第２樹脂槽から抜き出すための抜出口を設けるだけでも実施することができるため、設備構成が複雑になったり製造コストが高騰したりする心配もない。
なお、前記抜出口は、第２樹脂槽から第１樹脂槽へと強化繊維束が引き出されるときに当該強化繊維束をしごいて気泡を押し出し可能にする口径で形成されているものとするのが好適である。 Moreover, if it is an above-mentioned apparatus structure, while providing the partition with respect to the resin tank which stores the thermoplastic resin to impregnate and partitioning into the 1st resin tank and the 2nd resin tank, for this partition, Since it can be carried out only by providing an outlet for extracting the reinforcing fiber bundle from the second resin tank, there is no concern that the equipment configuration becomes complicated or the manufacturing cost increases.
The outlet is formed with a diameter that allows the reinforcing fiber bundles to be pushed out and bubbles to be pushed out when the reinforcing fiber bundles are drawn from the second resin tank to the first resin tank. Is preferred.

このようにすれば、強化繊維束が第２樹脂槽から抜出口を経由して第１樹脂槽へ引き出される際に、強化繊維束がしごかれて気泡が押し出されるようになるので、しごかれた強化繊維束の内部に第２樹脂だけでなく、第１樹脂も十分にしみ込んで、行き渡るようになる。そのため、樹脂が含浸しきれなかった部分が空隙として残ることがなく、一層効果的である。   In this way, when the reinforcing fiber bundle is drawn from the second resin tank to the first resin tank via the outlet, the reinforcing fiber bundle is squeezed and air bubbles are pushed out. Not only the second resin but also the first resin is sufficiently soaked into the inside of the bundle of reinforcing fibers so as to spread. Therefore, a portion that cannot be completely impregnated with the resin does not remain as a void, which is more effective.

なお、前記隔壁は、槽間での熱移動を抑制する断熱部材で構成されて、前記第１樹脂槽と第２樹脂槽が互いに異なる温度で樹脂を保持できるようになっているのが好ましい。
このようにすれば、第１樹脂槽の保持温度と第２樹脂槽の保持温度とを変更することで同じ種類の樹脂を互いに溶融粘度が異なる第１樹脂と第２樹脂として用いることができ、さまざまな種類の樹脂を用いて多様な繊維強化熱可塑性樹脂ペレットを製造することが可能となる。 In addition, it is preferable that the said partition is comprised with the heat insulation member which suppresses the heat transfer between tanks, and the said 1st resin tank and the 2nd resin tank can hold | maintain resin at a mutually different temperature.
By doing this, the same type of resin can be used as the first resin and the second resin having different melt viscosities by changing the holding temperature of the first resin tank and the holding temperature of the second resin tank, A variety of fiber reinforced thermoplastic resin pellets can be produced using various types of resins.

また、本発明の長繊維強化熱可塑性樹脂ストランドの製造方法は、上述した製造装置を用いて、長繊維強化熱可塑性樹脂ストランドを製造する長繊維強化熱可塑性樹脂ストランドの製造方法であって、前記第１樹脂槽と第２樹脂槽とを隔壁を用いて隔てると共に、当該隔壁に強化繊維束が通過可能な抜出口を形成しておき、前記第２樹脂槽で第２樹脂が含浸した強化繊維束を前記抜出口を経由して第１樹脂槽へと直接引き抜くことで、前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させることを特徴とするものである。
なお、本願発明の長繊維強化熱可塑性樹脂ストランドの製造装置の最も好ましい形態は、強化繊維束に含浸される熱可塑性の第１樹脂を溶融状態で貯留する第１樹脂槽と、前記第１樹脂槽での含浸に先立って前記強化繊維束に含浸され且つ前記第１樹脂より溶融粘度が低く設定されている第２樹脂を溶融状態で貯留する第２樹脂槽とを備え、前記第１樹脂槽と第２樹脂槽とは隔壁により隔てられており、前記隔壁には強化繊維束を第２樹脂槽から第１樹脂槽へと抜き出す抜出口が設けられ、前記強化繊維束を、第２樹脂槽から抜出口を経由し第１樹脂槽へと引き抜くことで、前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させる構成とされていて、前記抜出口は、第２樹脂槽から第１樹脂槽へと強化繊維束が引き出されるときに当該強化繊維束をしごいて気泡を押し出し可能にする口径で形成されており、前記抜出口の内径が強化繊維束の径と略同じとされている。
また、本願発明の長繊維強化熱可塑性樹脂ストランドの製造装置の他の好ましい形態は、強化繊維束に含浸される熱可塑性の第１樹脂を溶融状態で貯留する第１樹脂槽と、前記第１樹脂槽での含浸に先立って前記強化繊維束に含浸され且つ前記第１樹脂より溶融粘度が低く設定されている第２樹脂を溶融状態で貯留する第２樹脂槽とを備え、前記第１樹脂槽と第２樹脂槽とは隔壁により隔てられており、前記隔壁には強化繊維束を第２樹脂槽から第１樹脂槽へと抜き出す抜出口が設けられ、前記強化繊維束を、第２樹脂槽から抜出口を経由し第１樹脂槽へと引き抜くことで、前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させる構成とされていて、前記隔壁は、槽間での熱移動を抑制する断熱部材で構成されて、前記第１樹脂槽と第２樹脂槽が互いに異なる温度で樹脂を保持できるようになっている。 Further, the method for producing a long fiber reinforced thermoplastic resin strand of the present invention is a method for producing a long fiber reinforced thermoplastic resin strand for producing a long fiber reinforced thermoplastic resin strand using the above-described production apparatus. The first resin tank and the second resin tank are separated using a partition wall, and an outlet through which the reinforcing fiber bundle can pass is formed in the partition wall, and the reinforcing fiber impregnated with the second resin in the second resin tank is formed. The reinforcing fiber bundle impregnated with the second resin is impregnated with the first resin by directly pulling the bundle through the outlet and into the first resin tank.
The most preferable embodiment of the long fiber reinforced thermoplastic resin strand production apparatus of the present invention is a first resin tank for storing a thermoplastic first resin impregnated in a reinforcing fiber bundle in a molten state, and the first resin. Prior to impregnation in the tank, a second resin tank for storing the second resin impregnated in the reinforcing fiber bundle and having a melt viscosity set lower than that of the first resin in a molten state, the first resin tank And the second resin tank are separated by a partition, and the partition is provided with an outlet for extracting the reinforcing fiber bundle from the second resin tank to the first resin tank, and the reinforcing fiber bundle is connected to the second resin tank. The reinforcing resin bundle impregnated with the second resin is impregnated with the first resin by being pulled out from the first resin tank through the outlet, and the outlet is connected to the second resin tank from the second resin tank. 1 When the reinforcing fiber bundle is pulled out into one resin tank It squeezes the fiber bundle is formed by a diameter which allows extrusion bubble, the inside diameter of the draw-out opening is substantially the same as the diameter of the reinforcing fiber bundle.
Moreover, the other preferable form of the manufacturing apparatus of the long fiber reinforced thermoplastic resin strand of this invention is the 1st resin tank which stores the thermoplastic 1st resin impregnated in a reinforced fiber bundle in a molten state, The said 1st Prior to impregnation in the resin tank, a second resin tank for storing the second resin impregnated in the reinforcing fiber bundle and having a melt viscosity set lower than that of the first resin in a molten state. The tank and the second resin tank are separated from each other by a partition wall, and the partition wall is provided with an outlet for extracting the reinforcing fiber bundle from the second resin tank to the first resin tank. The reinforcing resin bundle impregnated with the second resin is impregnated with the first resin by pulling it out from the tank via the outlet port, and the partition moves heat between the tanks. The first resin tank and the second resin tank. Fat bath so as to be capable of retaining the resin at different temperatures.

本発明に係る長繊維強化熱可塑性樹脂ストランドの製造装置及び製造方法を用いれば、強化繊維束の内部に熱可塑性樹脂を良好に含浸させて、強化繊維の分散性に優れ且つ気泡のないストランドやペレットを実際に製造することができる。   If the apparatus and method for producing a long fiber reinforced thermoplastic resin strand according to the present invention are used, a strand that is excellent in dispersibility of the reinforcing fiber and has no air bubbles can be obtained by satisfactorily impregnating the thermoplastic fiber inside the reinforcing fiber bundle. Pellets can actually be produced.

長繊維強化熱可塑性樹脂ストランドの製造工程を模式的に示した側面図である。It is the side view which showed typically the manufacturing process of the long fiber reinforced thermoplastic resin strand. 図１のＡ部拡大図である。It is the A section enlarged view of FIG. 強化繊維束に溶融樹脂が含浸した様子を示した断面図であって（ａ）は図２のＢ−Ｂ線断面図に相当させてあり（ｂ）は図２のＣ−Ｃ線断面図に相当させてある。It is sectional drawing which showed a mode that molten resin impregnated the reinforced fiber bundle, Comprising: (a) is made to correspond to the BB sectional drawing of FIG. 2, (b) is CC sectional drawing of FIG. Corresponding.

以下、本発明の実施の形態を、図面に基づき説明する。
図１及び図２は、本発明に係る長繊維強化熱可塑性樹脂ストランドの製造装置１を模式的に示している。
この製造装置１は、ガラス繊維などの長繊維（フィラメント）を２０００〜３０００本集めて外径１〜２ｍｍ程度の紐状束にした上で、この紐状束の内部及び外側にポリプロピレン（ＰＰ）等の集束剤を含浸及び塗布することで、ペレットの元となる強化繊維束２（ストランド）を製造するものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 has shown typically the manufacturing apparatus 1 of the long fiber reinforced thermoplastic resin strand which concerns on this invention.
The manufacturing apparatus 1 collects 2000 to 3000 long fibers (filaments) such as glass fibers to form a string-like bundle having an outer diameter of about 1 to 2 mm, and polypropylene (PP) inside and outside the string-like bundle. A reinforcing fiber bundle 2 (strand) that is a source of pellets is produced by impregnating and applying a sizing agent such as.

製造装置１は、集束剤が塗布される前の強化繊維束２がボビン３に巻き取られた状態の回巻体４を、一つ又は複数（図例では３つ）保持するストック部５と、このストック部５から強化繊維束２を連続的に送り出すフィード部６と、このフィード部６によって送り出される強化繊維束２に熱可塑性の溶融樹脂７を含浸させる（集束剤が塗布する）樹脂含浸部８とを有している。さらに、製造装置１は、樹脂含浸部８から取り出される長繊維強化樹脂ストランド９に対して適宜処理を施す後処理部１０とを有している。   The manufacturing apparatus 1 includes a stock unit 5 that holds one or more (three in the illustrated example) wound bodies 4 in a state in which the reinforcing fiber bundle 2 before the sizing agent is applied is wound around the bobbin 3. The feed portion 6 for continuously feeding the reinforcing fiber bundle 2 from the stock portion 5 and the resin impregnation in which the reinforcing fiber bundle 2 sent out by the feed portion 6 is impregnated with a thermoplastic molten resin 7 (a sizing agent is applied). Part 8. Furthermore, the manufacturing apparatus 1 includes a post-processing unit 10 that appropriately performs processing on the long fiber reinforced resin strand 9 taken out from the resin-impregnated unit 8.

この後処理部１０には、例えば長繊維強化樹脂ストランド９を冷却し、含浸状態となった樹脂の硬化を促す水槽１２や、長繊維強化樹脂ストランド９に撚りをかける撚りローラ装置１３、長繊維強化樹脂ストランド９を所定長さに切断するペレタイザ１４などが含まれている。
製造装置１に備えられた樹脂含浸部８は、強化繊維束２の移送方向を向く長い筒状となっており、この樹脂含浸部８内には熱可塑性の溶融樹脂７が貯留されている。強化繊維束２が筒状の樹脂含浸部８内を通過することで、熱可塑性の溶融樹脂７が含浸・塗布される。 The post-processing unit 10 includes, for example, a water tank 12 that cools the long fiber reinforced resin strand 9 and promotes curing of the impregnated resin, a twist roller device 13 that twists the long fiber reinforced resin strand 9, and a long fiber. A pelletizer 14 for cutting the reinforced resin strand 9 into a predetermined length is included.
The resin impregnated portion 8 provided in the manufacturing apparatus 1 has a long cylindrical shape facing the transfer direction of the reinforcing fiber bundle 2, and a thermoplastic molten resin 7 is stored in the resin impregnated portion 8. As the reinforcing fiber bundle 2 passes through the cylindrical resin impregnated portion 8, the thermoplastic molten resin 7 is impregnated and applied.

樹脂含浸部８の入口（強化繊維束２の移送方向において上流側）には、強化繊維束２を通過可能な入口孔２７が形成されており、この入口孔２７を介して、強化繊維束２は樹脂含浸部８内に入ってゆく。樹脂含浸部８の出口にはダイノズル１１が設けられており、取り出される長繊維強化樹脂ストランド９を所定断面径（太さ）に整形させるようになっている。樹脂含浸部８内であって出口と入口の間には、搬送ロールが設けられ、強化繊維束２は搬送ロールに掛け廻されつつ、出口から入口へと移送される。   An inlet hole 27 that can pass through the reinforcing fiber bundle 2 is formed at the inlet of the resin impregnated portion 8 (upstream in the transfer direction of the reinforcing fiber bundle 2). The reinforcing fiber bundle 2 is formed through the inlet hole 27. Enters the resin impregnated portion 8. A die nozzle 11 is provided at the outlet of the resin impregnated portion 8, and the long fiber reinforced resin strand 9 to be taken out is shaped into a predetermined cross-sectional diameter (thickness). A transport roll is provided between the outlet and the inlet in the resin impregnated portion 8, and the reinforcing fiber bundle 2 is transferred from the outlet to the inlet while being wound around the transport roll.

さらに、本発明に係る長繊維強化熱可塑性樹脂ストランドの製造装置１では、図２に拡大して示すように、樹脂含浸部８が第２樹脂槽１５と第１樹脂槽１６とを有したものとされている。強化繊維束２の送り方向に対して、第２樹脂槽１５の方が上流側で、第１樹脂槽１６の方が下流側となるように配置されている。ゆえに、強化繊維束２は、第２樹脂槽１５を通った後に第１樹脂槽１６を通過するようになる。   Furthermore, in the long fiber reinforced thermoplastic resin strand manufacturing apparatus 1 according to the present invention, as shown in an enlarged view in FIG. 2, the resin impregnated portion 8 has a second resin tank 15 and a first resin tank 16. It is said that. With respect to the feeding direction of the reinforcing fiber bundle 2, the second resin tank 15 is disposed on the upstream side, and the first resin tank 16 is disposed on the downstream side. Therefore, the reinforcing fiber bundle 2 passes through the first resin tank 16 after passing through the second resin tank 15.

第２樹脂槽１５には熱可塑性の第２樹脂７ａが溶融状態で貯留され、第１樹脂槽１６には熱可塑性の第１樹脂７ｂが溶融状態で貯留されている。具体的には、第２樹脂槽１５には熱可塑性の第２樹脂７ａを供給される第２樹脂供給口２５ａが設けられ、この第２樹脂供給口２５ａには、当該第２樹脂供給口２５ａに第２樹脂７ａを送り出す送り出し装置２６ａが設けられている。第１樹脂槽１６には熱可塑性の第１樹脂７ｂが供給される第１樹脂供給口２５ｂが設けられ、この第１樹脂供給口２５ｂには、当該第１樹脂供給口２５ｂに第１樹脂７ｂを送り出す送り出し装置２６ｂが設けられている。   The second resin tank 15 stores the second thermoplastic resin 7a in a molten state, and the first resin tank 16 stores the first thermoplastic resin 7b in a molten state. Specifically, the second resin tank 15 is provided with a second resin supply port 25a through which the thermoplastic second resin 7a is supplied, and the second resin supply port 25a has the second resin supply port 25a. A delivery device 26a for delivering the second resin 7a is provided. The first resin tank 16 is provided with a first resin supply port 25b to which a thermoplastic first resin 7b is supplied. The first resin supply port 25b has a first resin 7b connected to the first resin supply port 25b. Is provided.

これら第２樹脂槽１５内の第２樹脂７ａと第１樹脂槽１６内の第１樹脂７ｂとは、例えば樹脂の種類を異ならせるなどにより、第２樹脂７ａの溶融粘度が第１樹脂７ｂの溶融粘度よりも低くなる関係に設定されている。
第２樹脂７ａの溶融粘度を第１樹脂７ｂの溶融粘度よりも低くする手法としては、第２樹脂７ａに第１樹脂７ｂの樹脂より同じ溶融温度でも溶融粘度が低くなるような種類の熱可塑性樹脂を用いてもよいし、また第２樹脂槽１５内の温度（樹脂の貯留温度）を第１樹脂槽１６内より高温にすれば同じ種類の熱可塑性樹脂でも溶融粘度を変化させることができる。また、例えば熱可塑性樹脂が同じＰＰであっても、第２樹脂７ａに低分子量のもの、第１樹脂７ｂに高分子量のものを用いれば、第２樹脂７ａの溶融粘度を第１樹脂７ｂの溶融粘度よりも低くすることができる。 The second resin 7a in the second resin tank 15 and the first resin 7b in the first resin tank 16 have a melt viscosity of the second resin 7a of the first resin 7b by, for example, different types of resins. The relationship is set to be lower than the melt viscosity.
As a method for making the melt viscosity of the second resin 7a lower than the melt viscosity of the first resin 7b, the second resin 7a has a thermoplastic resin of a kind in which the melt viscosity is lower than that of the resin of the first resin 7b even at the same melting temperature. Resin may be used, and if the temperature in the second resin tank 15 (resin storage temperature) is higher than that in the first resin tank 16, the melt viscosity can be changed even with the same kind of thermoplastic resin. . For example, even if the thermoplastic resin is the same PP, if the second resin 7a has a low molecular weight and the first resin 7b has a high molecular weight, the melt viscosity of the second resin 7a is less than that of the first resin 7b. It can be lower than the melt viscosity.

さて、この実施形態では、筒状に形成された樹脂含浸部８の内部に、当該樹脂含浸８を上流側と下流側とに隔てる隔壁２０を設けることにより、第２樹脂槽１５と第１樹脂槽１６とが隣接して設けられるものとなっている。即ち、第２樹脂槽１５と第１樹脂槽１６とは両槽間に間隔を置かずに直接的に併設されたものとなっている。なお、二つの槽を連結してその連結間にできる壁を隔壁２０にする構造としてもよいし、一つの槽内に隔壁２０を設けることでその槽内を二つの槽に仕切るような構造としてもよい。この場合、第２樹脂槽１５と第１樹脂槽１６とを隔てる隔壁２０として、両槽間での熱移動を抑制する断熱部材により形成しておき、第２樹脂槽１５と第１樹脂槽１６とが、各別に異なる温度で溶融樹脂を保持できるようにするのが好適である。   Now, in this embodiment, by providing the partition 20 which divides the said resin impregnation 8 into the upstream and the downstream in the inside of the resin impregnation part 8 formed in the cylinder shape, the second resin tank 15 and the first resin are provided. The tank 16 is provided adjacently. That is, the second resin tank 15 and the first resin tank 16 are directly provided without any gap between the two tanks. In addition, it is good also as a structure which connects the two tanks, and makes the wall formed between the connection into the partition 20, or as a structure which partitions the inside of the tank into two tanks by providing the partition 20 in one tank. Also good. In this case, the partition wall 20 that separates the second resin tank 15 and the first resin tank 16 is formed of a heat insulating member that suppresses heat transfer between the two tanks, and the second resin tank 15 and the first resin tank 16 are formed. However, it is preferable that the molten resin can be held at different temperatures.

この隔壁２０には両槽内間を相互連通させる抜出口２１が設けられている。従って、この抜出口２１により、第２樹脂槽１５内の強化繊維束２を第１樹脂槽１６内へと抜き出すことができる。なお、この抜出口２１が設けられる位置は、第２樹脂槽１５及び第１樹脂槽１６の各槽内において、共に溶融樹脂（第２樹脂７ａ、第１樹脂７ｂ）が貯留される深さ範囲内とすることが必要である。尤も、第２樹脂槽１５及び第１樹脂槽１６の両槽内において、溶融樹脂が常時充満される仕様とするのであれば、抜出口２１の位置は隔壁２０のどの位置でもよい。   The partition wall 20 is provided with an outlet 21 for communicating between the two tanks. Therefore, the reinforcing fiber bundle 2 in the second resin tank 15 can be extracted into the first resin tank 16 through the outlet 21. The position where the outlet 21 is provided is a depth range in which the molten resin (second resin 7a, first resin 7b) is stored in each of the second resin tank 15 and the first resin tank 16. It is necessary to be inside. However, the position of the outlet 21 may be any position of the partition wall 20 as long as the molten resin is always filled in both the second resin tank 15 and the first resin tank 16.

この抜出口２１は、第２樹脂槽１５から第１樹脂槽１６への強化繊維束２の通過を許すものの、第１樹脂槽１６〜第２樹脂槽１５間の樹脂の移動（浸入）を規制する大きさとされている。すなわち、抜出口２１の内径は強化繊維束２の径を略同じとされている。なお、抜出口２１は、通過時に強化繊維束２をしごいて気泡を押し出し可能にするような口径で形成されていてもよい。とはいえ、具体的に抜出口２１の口径をどの程度のサイズにするかは、強化繊維束２の太さや引張強度、強化繊維束２の送り速度、第２樹脂７ａの粘度などの種々様々な条件によって変動し得るが、例えば外径１ｍｍφの強化繊維束２の場合であれば抜出口２１は口径１ｍｍφ〜３ｍｍφ程度に形成すればよい。   The outlet 21 allows the reinforcing fiber bundle 2 to pass from the second resin tank 15 to the first resin tank 16 but restricts the movement (intrusion) of the resin between the first resin tank 16 and the second resin tank 15. It is supposed to be large. That is, the inner diameter of the outlet 21 is substantially the same as the diameter of the reinforcing fiber bundle 2. Note that the outlet 21 may be formed with a diameter that allows the reinforcing fiber bundle 2 to be squeezed out to allow bubbles to be pushed out during passage. However, the size of the diameter of the outlet 21 specifically depends on the thickness and tensile strength of the reinforcing fiber bundle 2, the feeding speed of the reinforcing fiber bundle 2, the viscosity of the second resin 7a, and the like. For example, in the case of the reinforcing fiber bundle 2 having an outer diameter of 1 mmφ, the outlet 21 may be formed with a diameter of about 1 mmφ to 3 mmφ.

以下、このような構成を具備して成る本発明の製造装置１により、長繊維強化熱可塑性樹脂ストランドを製造する際の状況、言い換えれば本発明の長繊維強化熱可塑性樹脂ストランドの製造方法を説明する。
まずは、製造装置１のストック部５に保持された一つ又は複数の回巻体４から、フィード部６が強化繊維束２を連続的に引き出し、この強化繊維束２を樹脂含浸部８の入口孔２７を介して樹脂含浸部８内へと送り込む。樹脂含浸部８では、強化繊維束２は最初に第２樹脂槽１５内を通過し、次に隔壁２０の抜出口２１を経由して第１樹脂槽１６内を通過するようになる。強化繊維束２は、フィード部６により連続的に送り出されているため、第２樹脂槽１５を通過した強化繊維束２は連続的に第２樹脂７ａが含浸され、第２樹脂７ａが含浸した強化繊維束２は抜出口２１を通過した後、第２樹脂槽１６の第１樹脂７ｂに含浸されることになる。 Hereinafter, the production process of the long fiber reinforced thermoplastic resin strand by the production apparatus 1 of the present invention having such a configuration, in other words, the production method of the long fiber reinforced thermoplastic resin strand of the present invention will be described. To do.
First, the feed unit 6 continuously pulls out the reinforcing fiber bundle 2 from one or a plurality of wound bodies 4 held in the stock unit 5 of the manufacturing apparatus 1, and the reinforcing fiber bundle 2 is drawn into the entrance of the resin impregnated unit 8. It is fed into the resin impregnated portion 8 through the hole 27. In the resin impregnated portion 8, the reinforcing fiber bundle 2 first passes through the second resin tank 15, and then passes through the first resin tank 16 via the outlet 21 of the partition wall 20. Since the reinforcing fiber bundle 2 is continuously fed out by the feed unit 6, the reinforcing fiber bundle 2 that has passed through the second resin tank 15 is continuously impregnated with the second resin 7a and impregnated with the second resin 7a. The reinforcing fiber bundle 2 passes through the outlet 21 and is then impregnated in the first resin 7b of the second resin tank 16.

これにより強化繊維束２には、第２樹脂槽１５内では低粘度の第２樹脂７ａが含浸し（図３（ａ）参照）、第１樹脂槽１６内では、第２樹脂７ａよりも高粘度の第１樹脂７ｂが含浸し且つ繊維束の周りを被覆するようになる（図３（ｂ）参照）。
そして、第１樹脂槽１６に設けられたダイノズル１１から所定断面径（太さ）を有した長繊維強化樹脂ストランド９として取り出され、この長繊維強化樹脂ストランド９が、後処理部１０において水槽１２での冷却、撚りローラ装置１３による撚りの付与、ペレタイザ１４による所定長さごとの切断などを受けることとなり、最終的に長繊維強化熱可塑性樹脂ペレット３０として製造されることとなる。 As a result, the reinforcing fiber bundle 2 is impregnated with the low-viscosity second resin 7a in the second resin tank 15 (see FIG. 3A), and is higher than the second resin 7a in the first resin tank 16. The first resin 7b having a viscosity is impregnated and covers around the fiber bundle (see FIG. 3B).
And it is taken out from the die nozzle 11 provided in the 1st resin tank 16 as the long fiber reinforced resin strand 9 which has predetermined cross-sectional diameter (thickness), and this long fiber reinforced resin strand 9 is the water tank 12 in the post-processing part 10. In this way, it is subjected to cooling, twisting by the twisting roller device 13, cutting by a predetermined length by the pelletizer 14, and the like, and finally it is produced as a long fiber reinforced thermoplastic resin pellet 30.

この製造過程にあって、樹脂含浸部８では、強化繊維束２が第２樹脂槽１５から抜出口２１を経由して第１樹脂槽１６へと引き出されるに際し、強化繊維束２は外気（空気）に接触することなく、迅速で直接的且つ連続的に熱可塑性樹脂の含浸処理が続行されることになる。すなわち、第２樹脂槽１５で強化繊維束２に含浸した第２樹脂７ａが固化する前に、強化繊維束２は第１樹脂槽１６に入ることになる。   In this manufacturing process, when the reinforcing fiber bundle 2 is pulled out from the second resin tank 15 to the first resin tank 16 through the outlet 21 in the resin impregnated portion 8, the reinforcing fiber bundle 2 is exposed to the outside air (air). The thermoplastic resin impregnation process is continued quickly, directly and continuously without contact with the resin. That is, the reinforcing fiber bundle 2 enters the first resin tank 16 before the second resin 7a impregnated in the reinforcing fiber bundle 2 in the second resin tank 15 is solidified.

そして、強化繊維束２が第１樹脂槽１６内を通過する際には、第２樹脂槽１５で含浸された第２樹脂７ａに対して第１樹脂槽１６で含浸される第１樹脂７ｂが置き換わるか、又は第２樹脂７ａと第１樹脂７ｂとが混合・積層する状態となり、結果として、含浸させたい第１樹脂７ｂが強化繊維束２の内部まで（芯まで）浸透しやすくなる。
しかも、第２樹脂槽１５中で強化繊維束２に気泡が含まれていたとしても、強化繊維束２が第２樹脂槽１５から第１樹脂槽１６へ引き出される際に抜出口２１によってしごかれるので、この気泡が繊維束外へと押し出され、強化繊維束２内には第２樹脂７ａだけでなく第１樹脂７ｂも十分にしみ込んで行き渡るようになる。 When the reinforcing fiber bundle 2 passes through the first resin tank 16, the first resin 7 b impregnated in the first resin tank 16 with respect to the second resin 7 a impregnated in the second resin tank 15 is As a result, the second resin 7a and the first resin 7b are mixed and laminated, and as a result, the first resin 7b to be impregnated easily penetrates into the reinforcing fiber bundle 2 (to the core).
Moreover, even if the reinforcing fiber bundle 2 contains air bubbles in the second resin tank 15, the ladder 21 is pulled out by the outlet 21 when the reinforcing fiber bundle 2 is drawn from the second resin tank 15 to the first resin tank 16. Therefore, the bubbles are pushed out of the fiber bundle, and not only the second resin 7a but also the first resin 7b are sufficiently soaked into the reinforcing fiber bundle 2 and spread.

それゆえ、強化繊維束２には溶融樹脂の含浸不良に伴う空隙が残ることはなく、強化繊維束２の内部にまで熱可塑性樹脂（第１樹脂７ｂ）を良好に含浸させることができ、強化繊維２３（図３中に示す）の分散性に優れ且つ気泡のないペレット３０を製造することができる。また、第２樹脂槽１５の第２樹脂７ａと第１樹脂槽１６の第１樹脂７ｂがともに強化繊維束２へ含浸するため、ペレット３０としての最終的な樹脂含有率を上げることができる。   Therefore, voids due to poor impregnation of the molten resin do not remain in the reinforcing fiber bundle 2, and the thermoplastic fiber (first resin 7b) can be satisfactorily impregnated into the reinforcing fiber bundle 2, and the reinforcement A pellet 30 having excellent dispersibility of the fibers 23 (shown in FIG. 3) and free of bubbles can be produced. Moreover, since both the 2nd resin 7a of the 2nd resin tank 15 and the 1st resin 7b of the 1st resin tank 16 impregnate the reinforcing fiber bundle 2, the final resin content as the pellet 30 can be raised.

なお、この樹脂含浸部８では、強化繊維束２への含浸性や密着性を向上させるために添加剤（例えば、マレイン酸変性ＰＰなど）を入れることができる。この場合、添加剤は、第２樹脂槽１５の第２樹脂７ａにのみ添加すればよい。このようにすることで、使用する添加剤の総量を抑制できる利点がある。
本発明は、上記実施形態に限定されるものではなく、実施の形態に応じて適宜変更可能である。 In addition, in this resin impregnation part 8, in order to improve the impregnation property and adhesiveness to the reinforcing fiber bundle 2, an additive (for example, maleic acid modified PP etc.) can be added. In this case, the additive only needs to be added to the second resin 7 a of the second resin tank 15. By doing in this way, there exists an advantage which can suppress the total amount of the additive to be used.
The present invention is not limited to the above-described embodiment, and can be appropriately changed according to the embodiment.

１ 製造装置
２ 強化繊維束
７ａ 第２樹脂
７ｂ 第１樹脂
１５ 第１樹脂槽
１６ 第２樹脂槽
２０ 隔壁
２１ 抜出口
３０ ペレット DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 2 Reinforcement fiber bundle 7a 2nd resin 7b 1st resin 15 1st resin tank 16 2nd resin tank 20 Partition 21 Exit 30 Pellets

Claims (3)

強化繊維束に含浸される熱可塑性の第１樹脂を溶融状態で貯留する第１樹脂槽と、前記第１樹脂槽での含浸に先立って前記強化繊維束に含浸され且つ前記第１樹脂より溶融粘度が低く設定されている第２樹脂を溶融状態で貯留する第２樹脂槽とを備え、
前記第１樹脂槽と第２樹脂槽とは隔壁により隔てられており、前記隔壁には強化繊維束を第２樹脂槽から第１樹脂槽へと抜き出す抜出口が設けられ、
前記強化繊維束を、第２樹脂槽から抜出口を経由し第１樹脂槽へと引き抜くことで、前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させる構成とされていて、
前記抜出口は、第２樹脂槽から第１樹脂槽へと強化繊維束が引き出されるときに当該強化繊維束をしごいて気泡を押し出し可能にする口径で形成されており、
前記抜出口の内径が強化繊維束の径と略同じとされていることを特徴とする長繊維強化熱可塑性樹脂ストランドの製造装置。 A first resin tank for storing the thermoplastic first resin impregnated in the reinforcing fiber bundle in a molten state; and the impregnated reinforcing fiber bundle prior to impregnation in the first resin tank and melted from the first resin. A second resin tank for storing the second resin having a low viscosity in a molten state;
The first resin tank and the second resin tank are separated by a partition, and the partition is provided with an outlet for extracting the reinforcing fiber bundle from the second resin tank to the first resin tank,
The reinforcing fiber bundle is configured to impregnate the first resin into the reinforcing fiber bundle impregnated with the second resin by pulling the reinforcing fiber bundle from the second resin tank to the first resin tank via the outlet .
The outlet is formed with a diameter that allows the reinforcing fiber bundle to be squeezed out to extrude bubbles when the reinforcing fiber bundle is drawn from the second resin tank to the first resin tank,
An apparatus for producing a long fiber reinforced thermoplastic resin strand, wherein an inner diameter of the outlet is substantially the same as a diameter of a reinforcing fiber bundle . 強化繊維束に含浸される熱可塑性の第１樹脂を溶融状態で貯留する第１樹脂槽と、前記第１樹脂槽での含浸に先立って前記強化繊維束に含浸され且つ前記第１樹脂より溶融粘度が低く設定されている第２樹脂を溶融状態で貯留する第２樹脂槽とを備え、
前記第１樹脂槽と第２樹脂槽とは隔壁により隔てられており、前記隔壁には強化繊維束を第２樹脂槽から第１樹脂槽へと抜き出す抜出口が設けられ、
前記強化繊維束を、第２樹脂槽から抜出口を経由し第１樹脂槽へと引き抜くことで、前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させる構成とされていて、
前記隔壁は、槽間での熱移動を抑制する断熱部材で構成されて、前記第１樹脂槽と第２樹脂槽が互いに異なる温度で樹脂を保持できるようになっていることを特徴とする請求項１に記載の長繊維強化熱可塑性樹脂ストランドの製造装置。 A first resin tank for storing the thermoplastic first resin impregnated in the reinforcing fiber bundle in a molten state; and the impregnated reinforcing fiber bundle prior to impregnation in the first resin tank and melted from the first resin. A second resin tank for storing the second resin having a low viscosity in a molten state;
The first resin tank and the second resin tank are separated by a partition, and the partition is provided with an outlet for extracting the reinforcing fiber bundle from the second resin tank to the first resin tank,
The reinforcing fiber bundle is configured to impregnate the first resin into the reinforcing fiber bundle impregnated with the second resin by pulling the reinforcing fiber bundle from the second resin tank to the first resin tank via the outlet .
The partition wall is made of a heat insulating member that suppresses heat transfer between the tanks, and the first resin tank and the second resin tank can hold the resin at different temperatures. Item 2. An apparatus for producing a long fiber reinforced thermoplastic resin strand according to Item 1. 請求項１または２に記載された製造装置を用いて、長繊維強化熱可塑性樹脂ストランドを製造する長繊維強化熱可塑性樹脂ストランドの製造方法であって、
前記第１樹脂槽と第２樹脂槽とを隔壁を用いて隔てると共に、当該隔壁に強化繊維束が通過可能な抜出口を形成しておき、
前記第２樹脂槽で第２樹脂が含浸した強化繊維束を前記抜出口を経由して第１樹脂槽へと直接引き抜くことで、前記第２樹脂が含浸した強化繊維束に第１樹脂を含浸させること
を特徴とする長繊維強化熱可塑性樹脂ストランドの製造方法。
Using the manufacturing apparatus according to claim 1 or 2, a method for producing a long fiber-reinforced thermoplastic resin strand to produce a long fiber-reinforced thermoplastic resin strands,
Separating the first resin tank and the second resin tank using a partition, and forming an outlet through which the reinforcing fiber bundle can pass through the partition,
The reinforcing fiber bundle impregnated with the second resin in the second resin tank is directly drawn out to the first resin tank via the outlet, so that the reinforcing fiber bundle impregnated with the second resin is impregnated with the first resin. A process for producing a long fiber reinforced thermoplastic resin strand, characterized by comprising:
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