JP5556003B2 - Plasticizing injection device - Google Patents

Plasticizing injection device Download PDF

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JP5556003B2
JP5556003B2 JP2008293983A JP2008293983A JP5556003B2 JP 5556003 B2 JP5556003 B2 JP 5556003B2 JP 2008293983 A JP2008293983 A JP 2008293983A JP 2008293983 A JP2008293983 A JP 2008293983A JP 5556003 B2 JP5556003 B2 JP 5556003B2
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thermoplastic resin
plasticizing injection
electromagnetic induction
screw
induction heating
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JP2010120197A (en
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勝啓 石川
明子 石田
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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本発明は、電磁誘導加熱装置を備えた可塑化射出装置で、特にインラインスクリュ式のものに関する。   The present invention relates to a plasticizing injection apparatus provided with an electromagnetic induction heating apparatus, and particularly to an inline screw type apparatus.

本発明に関する従来技術として、スクリュヘッドの構成を改良し、溶融可塑化された樹脂が緩やかに通過するようにしたことにより、長繊維の折損を防止する、逆流防止リング付きスクリュヘッドを備えたインラインスクリュ式の可塑化射出装置が開示されている。（例えば、特許文献１参照。）。   As a prior art related to the present invention, an in-line equipped with a screw head with a backflow prevention ring which prevents the breakage of long fibers by improving the configuration of the screw head and allowing the melt-plasticized resin to pass through gently. A screw type plasticizing injection device is disclosed. (For example, refer to Patent Document 1).

また、大口径のスクリュ（特に、１００ｍｍ以上のスクリュ径）の仕様（Ｌ／Ｄ、供給部の長さ、溝深さ等）をガラス長繊維強化樹脂に最適な値とすることにより、可塑化性能を安定させるとともに、チェックリングの形状、溶融樹脂通路を適正な範囲とすることによって、ガラス長繊維の折損を抑えるとともに、射出工程におけるチェックリングのシール機能を改善して、ガラス長繊維強化樹脂材料からなる自動車部品等の大型射出成形品を安定して効率よく生産可能とするインラインスクリュ式の可塑化射出装置が開示されている（例えば、特許文献２参照。）。   In addition, plasticization is achieved by setting the specifications (L / D, supply section length, groove depth, etc.) of large-diameter screws (especially screw diameters of 100 mm or more) to optimum values for long glass fiber reinforced resin. By stabilizing the performance and keeping the shape of the check ring and molten resin passage within the proper range, the glass long fiber is prevented from being broken and the sealing function of the check ring in the injection process is improved. An in-line screw type plasticizing injection device that can stably and efficiently produce large-sized injection molded products such as automobile parts made of materials has been disclosed (for example, see Patent Document 2).

また、樹脂と強化繊維を可塑化混練すると同時に物理発泡剤を注入し、強化繊維の損傷を防止し、分散性を高める射出成形装置が開示されている（例えば、特許文献３参照。）。   Further, an injection molding apparatus is disclosed in which a physical foaming agent is injected simultaneously with plasticizing and kneading a resin and a reinforcing fiber to prevent damage to the reinforcing fiber and improve dispersibility (see, for example, Patent Document 3).

また、加熱シリンダ内に、樹脂ペレットを供給する射出成形用ホッパ本体の少なくとも一部が磁性材料で形成され、このホッパ本体の磁性材料で形成されたところに自己発熱させて樹脂ペレットを所定温度に昇温させ、加熱シリンダ内に供給するので、可塑化後の溶融樹脂は安定した温度となって成形金型に供給され変形、着色ムラ、及び物性低下を少なくできるよう電磁誘導加熱装置が設けられた射出成形装置が開示されている（例えば、特許文献４参照。）。
特開平６−２４６８０２号公報 特開２００４−２９１４０９号公報 特開２００８−１０１５号公報 特開平３−２６６６１５号公報 In addition, at least a part of the injection molding hopper main body for supplying the resin pellets is formed of a magnetic material in the heating cylinder, and the resin pellets are brought to a predetermined temperature by self-heating where the magnetic material of the hopper main body is formed. Since the temperature is raised and supplied into the heating cylinder, the molten resin after plasticization is supplied to the molding die at a stable temperature, and an electromagnetic induction heating device is provided so that deformation, uneven coloring, and deterioration of physical properties can be reduced. An injection molding apparatus is disclosed (for example, see Patent Document 4).
JP-A-6-246802 JP 2004-291409 A JP 2008-1015 A JP-A-3-266615

しかしながら、特許文献１のインラインスクリュ式の可塑化射出装置では、射出装置に弾性率の高い炭素繊維強化樹脂を用いる場合、スクリュの回転による剪断による折損が問題となる。   However, in the inline screw type plasticizing injection apparatus of Patent Document 1, when a carbon fiber reinforced resin having a high elastic modulus is used for the injection apparatus, breakage due to shear due to rotation of the screw becomes a problem.

また、特許文献２のインラインスクリュ式の可塑化射出装置では、熱可塑性樹脂の粘度に応じてスクリュの構造を最適化する必要がある。   Moreover, in the inline screw type plasticizing injection apparatus of patent document 2, it is necessary to optimize the structure of a screw according to the viscosity of a thermoplastic resin.

また、特許文献３の繊維強化樹脂成形品の成形方法及び成形装置では、物理発泡による分散混練工程で長繊維を含んでいる樹脂成形品に対して一様な発泡を得て強度・剛性を確保するのが困難である。又、スクリュの回転による剪断による折損が問題となる。   In addition, in the molding method and molding apparatus for fiber reinforced resin moldings disclosed in Patent Document 3, uniform foaming is obtained for resin moldings containing long fibers in a dispersion kneading process by physical foaming to ensure strength and rigidity. Difficult to do. In addition, breakage due to shear due to screw rotation becomes a problem.

また、特許文献４の電磁誘導加熱装置が設けられた射出成形装置では、連結部は凸状で樹脂との接触面積を増加させているが、ホッパ自体が発熱するため、壁と接触する部分だけが温度上昇する。樹脂の内部まで熱が伝達する前に、加熱シリンダに供給されしまうため、スクリュ供給時の樹脂粘度は十分に低下せず、摩擦力が大きくなり、繊維を折損してしまう。また、ホッパの一部をコイルで巻いているが、ホッパ全体が磁性材料で構成されるため、ホッパ全体の温度が上昇し、壁面の樹脂が異常に加熱されて樹脂劣化を招来する虞がある。また、ホッパ下の供給部で樹脂が溶融して、圧縮部への輸送不良を起こし、計量ができなくなる虞がある。   Moreover, in the injection molding apparatus provided with the electromagnetic induction heating device of Patent Document 4, the connecting portion is convex and increases the contact area with the resin. However, since the hopper itself generates heat, only the portion in contact with the wall is used. Rises in temperature. Since heat is supplied to the heating cylinder before the heat is transferred to the inside of the resin, the resin viscosity at the time of screw supply is not sufficiently lowered, the frictional force is increased, and the fiber is broken. Moreover, although a part of the hopper is wound with a coil, since the entire hopper is made of a magnetic material, the temperature of the entire hopper rises, and the resin on the wall surface may be abnormally heated to cause resin deterioration. . In addition, the resin melts in the supply section under the hopper, which may cause poor transportation to the compression section and make weighing impossible.

本発明は上記問題点に鑑みてなされたものであり、炭素繊維の折損を従来装置より低減できるインラインスクリュ式の可塑化射出装置を提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide an in-line screw type plasticizing injection apparatus capable of reducing the breakage of carbon fibers as compared with the conventional apparatus.

上記課題を解決するため、請求項１に記載の発明は、シリンダとスクリュを備え、熱可塑性樹脂を供給する供給部と前記熱可塑性樹脂を圧縮する圧縮部を形成するインラインスクリュ式の可塑化射出装置であって、前記熱可塑性樹脂は炭素繊維を含有し、前記圧縮部及び前記供給部の少なくともいずれか一方に電磁誘導加熱装置が設けられ、前記電磁誘導加熱装置は、前記炭素繊維を自己発熱させる構成である。
また、請求項２に記載の発明は、前記電磁誘導加熱装置は、コイルと、前記コイルに電流を流す電源ユニットとを有し、前記コイルは、前記シリンダの内周側に設けられる。 In order to solve the above-mentioned problem, the invention described in claim 1 is an in-line screw type plasticizing injection comprising a cylinder and a screw, and forming a supply portion for supplying a thermoplastic resin and a compression portion for compressing the thermoplastic resin. The thermoplastic resin contains carbon fiber, and at least one of the compression unit and the supply unit is provided with an electromagnetic induction heating device, and the electromagnetic induction heating device self-heats the carbon fiber. It is the structure to make .
According to a second aspect of the present invention, the electromagnetic induction heating device includes a coil and a power supply unit that supplies current to the coil, and the coil is provided on the inner peripheral side of the cylinder.

また、請求項３に記載の発明は、前記圧縮部は前記熱可塑性樹脂の発熱を検知する温度検知手段を備え、前記温度検知手段からの信号で前記電磁誘導加熱装置をフィードバック制御することを特徴とする。 According to a third aspect of the present invention, the compression unit includes temperature detection means for detecting heat generation of the thermoplastic resin, and feedback-controls the electromagnetic induction heating device with a signal from the temperature detection means. And

また、請求項４に記載の発明は、前記炭素繊維の一部又は全部はロービングであること、を特徴とする。 The invention according to claim 4 is characterized in that a part or all of the carbon fiber is roving.

本発明では、熱可塑性樹脂に含有する炭素繊維が電磁誘導加熱装置により自己発熱し、熱可塑性樹脂を内部から加熱するので、圧縮部に送られた熱可塑性樹脂は、粘度が十分に低下して摩擦力が小さくなり、スクリュの回転による炭素繊維の剪断による折損を低減できる。したがって、炭素繊維の繊維長が５ｍｍ〜１０ｍｍの長繊維を熱可塑性樹脂に多く残すことができるため、衝撃強度の高い樹脂製品が得られる。また、長繊維と、長繊維が部分的に折損（分割）して得られる繊維長が１ｍｍ以下の短繊維が熱可塑性樹脂に混在することで、衝撃強度とウエルドのバランスが良好な樹脂製品が得られる。   In the present invention, the carbon fiber contained in the thermoplastic resin self-heats by the electromagnetic induction heating device and heats the thermoplastic resin from the inside, so that the viscosity of the thermoplastic resin sent to the compression section is sufficiently lowered. The frictional force is reduced, and breakage due to shearing of the carbon fiber due to the rotation of the screw can be reduced. Therefore, since many carbon fibers having a fiber length of 5 mm to 10 mm can be left in the thermoplastic resin, a resin product with high impact strength can be obtained. In addition, since a long fiber and a short fiber having a fiber length of 1 mm or less obtained by partially breaking (dividing) the long fiber are mixed in the thermoplastic resin, a resin product having a good balance between impact strength and weld is obtained. can get.

また、圧縮部は熱可塑性樹脂の粘度と相関のある発熱を温度検知手段により検知して、電磁誘導加熱装置をフィードバック制御するため、圧縮部での熱可塑性樹脂の粘度が安定し、炭素繊維の剪断による折損を安定して低減できるため、衝撃強度とウエルドのバランスが良好な樹脂製品が得られる。   In addition, since the compression part detects heat generation correlated with the viscosity of the thermoplastic resin by the temperature detection means and performs feedback control of the electromagnetic induction heating device, the viscosity of the thermoplastic resin in the compression part is stabilized, and the carbon fiber Since breakage due to shear can be stably reduced, a resin product having a good balance between impact strength and weld can be obtained.

また、炭素繊維の一部又は全部はロービングであるため、長繊維を熱可塑性樹脂に多く残すことができ衝撃強度が良好な樹脂製品が得られる。   Further, since part or all of the carbon fibers are roving, a large amount of long fibers can be left in the thermoplastic resin, and a resin product with good impact strength can be obtained.

以下に本発明の実施形態を図面を参照しつつ詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は本発明のインラインスクリュ式の可塑化射出装置１である。可塑化射出装置１は、シリンダ１０と、シリンダ１０に挿入されるスクリュ１１と、シリンダ１０に炭素繊維を含有する熱可塑性樹脂２０を導入するホッパ１２を備えている。シリンダ１０の外周には複数のバンドヒータ１３が設けられる。スクリュ１１は供給部と圧縮部を形成する。供給部には電磁誘導加熱装置３０のコイル３１が設けられる。   FIG. 1 shows an in-line screw type plasticizing injection apparatus 1 of the present invention. The plasticizing injection apparatus 1 includes a cylinder 10, a screw 11 inserted into the cylinder 10, and a hopper 12 that introduces a thermoplastic resin 20 containing carbon fiber into the cylinder 10. A plurality of band heaters 13 are provided on the outer periphery of the cylinder 10. The screw 11 forms a supply part and a compression part. The supply unit is provided with a coil 31 of an electromagnetic induction heating device 30.

炭素繊維を含有する熱可塑性樹脂２０としては、長繊維強化樹脂ペレット（ＧＦ・ＣＦ）、樹脂とチョップド（ＧＦ・ＣＦ）、樹脂とロービング（ＧＦ・ＣＦ）である。さらに、グラファイト、フラーレン、カーボンナノチューブを含有させてもよい。   Examples of the thermoplastic resin 20 containing carbon fibers include long fiber reinforced resin pellets (GF · CF), resin and chopped (GF · CF), and resin and roving (GF · CF). Further, graphite, fullerene, and carbon nanotubes may be contained.

電磁誘導加熱装置３０は、コイル３１と、コイル３１に交流電流を流す高周波電源ユニット３２を備えている。高周波電源ユニット３２によりコイル３１に交流電流を流すと、コイル３１の周囲に時間変化する磁界が生じる。時間変化する磁界の電磁誘導で、コイル３１の周囲にある炭素繊維には誘導電流が生じる。炭素繊維に誘導電流が生じると、その炭素繊維の抵抗値に応じて発熱が生じる。   The electromagnetic induction heating device 30 includes a coil 31 and a high-frequency power supply unit 32 that causes an alternating current to flow through the coil 31. When an alternating current is passed through the coil 31 by the high frequency power supply unit 32, a magnetic field that changes with time is generated around the coil 31. Due to electromagnetic induction of a time-varying magnetic field, an induced current is generated in the carbon fiber around the coil 31. When an induced current is generated in the carbon fiber, heat is generated according to the resistance value of the carbon fiber.

圧縮部には熱可塑性樹脂２０の発熱を検知する温度検知センサ４０を備える。温度検知センサ４０からの信号は制御装置４１に送られ、制御装置４１は高周波電源ユニット３２と接続して電磁誘導加熱装置３０をフィードバック制御する。   The compression unit includes a temperature detection sensor 40 that detects heat generation of the thermoplastic resin 20. A signal from the temperature detection sensor 40 is sent to the control device 41, and the control device 41 is connected to the high frequency power supply unit 32 to feedback control the electromagnetic induction heating device 30.

本発明のインラインスクリュ式の可塑化射出装置１の動作を説明する。ホッパ１２から炭素繊維を含む熱可塑性樹脂２０が投入されると、熱可塑性樹脂２０に含まれる炭素繊維は供給部にて電磁誘導加熱装置３０のコイル３１による電磁誘導により自己発熱する。炭素繊維の自己発熱により内部から加熱された熱可塑性樹脂２０は圧縮部に送られる。圧縮部に送られた熱可塑性樹脂２０は、粘度が十分に低下していて摩擦力が小さい。   The operation of the in-line screw type plasticizing injection apparatus 1 of the present invention will be described. When the thermoplastic resin 20 containing carbon fibers is introduced from the hopper 12, the carbon fibers contained in the thermoplastic resin 20 are self-heated by electromagnetic induction by the coil 31 of the electromagnetic induction heating device 30 in the supply unit. The thermoplastic resin 20 heated from the inside by self-heating of the carbon fiber is sent to the compression section. The thermoplastic resin 20 sent to the compression part has a sufficiently low viscosity and a small frictional force.

本発明のインラインスクリュ式の可塑化射出装置１では、熱可塑性樹脂２０に含有する炭素繊維が電磁誘導加熱装置３０により自己発熱し、熱可塑性樹脂２０を内部から加熱するので、圧縮部に送られた熱可塑性樹脂２０は、粘度が十分に低下して摩擦力が小さくなり、スクリュ１１の回転による炭素繊維の剪断による折損を低減できる。   In the in-line screw type plasticizing injection apparatus 1 of the present invention, the carbon fiber contained in the thermoplastic resin 20 is self-heated by the electromagnetic induction heating apparatus 30 and heats the thermoplastic resin 20 from the inside, so that it is sent to the compression section. Further, the thermoplastic resin 20 has a sufficiently low viscosity and a small frictional force, and can reduce breakage due to shearing of the carbon fiber due to the rotation of the screw 11.

図２は、熱可塑性樹脂２０に含有する炭素繊維の繊維長が５ｍｍ〜１０ｍｍの長繊維と繊維長が１ｍｍ以下の短繊維の占める重量割合を示す。本発明のインラインスクリュ式の可塑化射出装置１では、炭素繊維の繊維長が５ｍｍ〜１０ｍｍの長繊維を熱可塑性樹脂２０に多く残すことができるため、衝撃強度の高い樹脂製品が得られる。また、長繊維と、長繊維が部分的に折損（分割）して得られる繊維長が１ｍｍ以下の短繊維が熱可塑性樹脂２０に混在することで、衝撃強度とウエルドのバランスが良好な樹脂製品が得られる。   FIG. 2 shows the weight ratio of the carbon fibers contained in the thermoplastic resin 20 to the long fibers having a fiber length of 5 mm to 10 mm and the short fibers having a fiber length of 1 mm or less. In the in-line screw type plasticizing / injecting apparatus 1 of the present invention, a large number of carbon fibers having a fiber length of 5 mm to 10 mm can be left in the thermoplastic resin 20, so that a resin product having high impact strength can be obtained. In addition, a resin product having a good balance between impact strength and weld is obtained by mixing a long fiber and a short fiber having a fiber length of 1 mm or less obtained by partially breaking (dividing) the long fiber into the thermoplastic resin 20. Is obtained.

また、圧縮部は熱可塑性樹脂２０の粘度と相関のある発熱を温度検知センサ４０により検知して、制御装置４１は電磁誘導加熱装置３０をフィードバック制御するため、圧縮部での熱可塑性樹脂２０の粘度が安定し、炭素繊維の剪断による折損を安定して低減できるため、衝撃強度とウエルドのバランスが良好な樹脂製品が得られる。   Further, the compression unit detects heat generation correlated with the viscosity of the thermoplastic resin 20 by the temperature detection sensor 40, and the control device 41 performs feedback control of the electromagnetic induction heating device 30, so that the thermoplastic resin 20 in the compression unit is controlled. Since the viscosity is stable and the breakage due to shearing of the carbon fiber can be stably reduced, a resin product having a good balance between impact strength and weld can be obtained.

また、炭素繊維の一部又は全部にロービングとすることで、長繊維を熱可塑性樹脂２０に多く残すことができ衝撃強度が良好な樹脂製品が得られる。また、繊維長が長くなることで、電磁誘導の際の導電性が向上し、良好な自己発熱が得られる。   Further, by roving the carbon fiber partly or entirely, a large amount of long fibers can be left in the thermoplastic resin 20, and a resin product having good impact strength can be obtained. In addition, by increasing the fiber length, the electrical conductivity during electromagnetic induction is improved and good self-heating is obtained.

また、熱可塑性樹脂２０にグラファイト、フラーレン、カーボンナノチューブを含有させることにより、熱可塑性２０の熱伝導性が向上し、加熱時間を短縮できる。さらにグラファイト、フラーレンではそれ自体に異方性が無いため、樹脂製品の異方性の影響を受けにくい。   Moreover, by making the thermoplastic resin 20 contain graphite, fullerene, and carbon nanotube, the thermal conductivity of the thermoplastic 20 is improved and the heating time can be shortened. Furthermore, graphite and fullerene have no anisotropy per se and are not easily affected by the anisotropy of resin products.

本発明では、圧縮部を備えたインラインスクリュ式の可塑化射出装置であるが、圧縮部を備えていないインラインスクリュ式の可塑化射出装置への適用も可能である。また、本発明ではシリンダ１０の外周に複数のバンドヒータ１３を設けたが、バンドヒータ１３を設けない構成も可能である。   In the present invention, an inline screw type plasticizing injection apparatus provided with a compression part is applicable, but application to an inline screw type plasticizing injection apparatus not provided with a compression part is also possible. In the present invention, a plurality of band heaters 13 are provided on the outer periphery of the cylinder 10, but a configuration without the band heaters 13 is also possible.

（変形例１）
図３は、変形例１でサイドフィード口５１を備えたインラインスクリュ式の可塑化射出装置５０である。図１のインラインスクリュ式の可塑化射出装置１と共通の機能、部位については共通の符号を用いて説明する。 (Modification 1)
FIG. 3 shows an in-line screw type plasticizing injection apparatus 50 having a side feed port 51 in the first modification. Functions and parts common to the inline screw type plasticizing injection apparatus 1 of FIG. 1 will be described using common reference numerals.

変形例１の可塑化射出装置５０では、シリンダ１０の熱可塑性樹脂２０の溶融部に炭素繊維を供給するサイドフィード口５１を設け、また炭素繊維を含有しない熱可塑性樹脂５３はシリンダ１０の外周に設けられた複数のバンドヒータ５２で加熱される。その他の構成については図１と同一である。   In the plasticizing injection apparatus 50 of the first modification, a side feed port 51 for supplying carbon fibers is provided in the melted portion of the thermoplastic resin 20 of the cylinder 10, and the thermoplastic resin 53 not containing carbon fibers is provided on the outer periphery of the cylinder 10. Heated by a plurality of band heaters 52 provided. Other configurations are the same as those in FIG.

変形例１のインラインスクリュ式の可塑化射出装置５０の動作を説明する。炭素繊維を含有しない熱可塑性樹脂５３がホッパから導入されると、熱可塑性樹脂５３はスクリュ１１の回転により射出口方向へ送られる（未溶融部）。熱可塑性樹脂５３はバンドヒータ５２により加熱され、粘度が低下する（溶融部）。熱可塑性樹脂５３の粘度が低下した状態でサイドフィード口５１からは炭素繊維が供給される。炭素繊維は、スクリュ１１の回転により熱可塑性樹脂５３と混合して射出口方向へ送られる。   The operation of the inline screw type plasticizing injection apparatus 50 of Modification 1 will be described. When the thermoplastic resin 53 containing no carbon fiber is introduced from the hopper, the thermoplastic resin 53 is sent in the direction of the injection port by the rotation of the screw 11 (unmelted portion). The thermoplastic resin 53 is heated by the band heater 52, and the viscosity decreases (melted portion). Carbon fiber is supplied from the side feed port 51 in a state where the viscosity of the thermoplastic resin 53 is lowered. The carbon fiber is mixed with the thermoplastic resin 53 by the rotation of the screw 11 and sent to the injection port direction.

変形例１のインラインスクリュ式の可塑化射出装置５０では、炭素繊維は熱可塑性樹脂５３が溶融した状態でサイドフィード口５１から供給されるので、炭素繊維がスクリュ１１により射出口へ送られる距離を従来よりも短くすることが出来る。よって、スクリュ１１の回転による炭素繊維の剪断による折損を低減できる。   In the inline screw type plasticizing injection apparatus 50 of the first modification, the carbon fiber is supplied from the side feed port 51 in a state in which the thermoplastic resin 53 is melted, so that the distance by which the carbon fiber is sent to the injection port by the screw 11 is increased. It can be made shorter than before. Therefore, breakage due to shearing of the carbon fiber due to rotation of the screw 11 can be reduced.

変形例１では、スクリュは１段であるが、スクリュは２段スクリュでも良く、１段目は樹脂溶融のため圧縮部を備えるが、２段目は炭素繊維を分散させるためだけで圧縮部を備えないスクリュも可能である。また、スクリュ内にヒータを入れて、スクリュ自体を加熱する内筒加熱方式のスクリュも可能である。   In the first modification, the screw has one stage, but the screw may be a two-stage screw, and the first stage includes a compression section for melting the resin, but the second stage includes a compression section only for dispersing carbon fibers. Screws without them are also possible. Also, an inner cylinder heating type screw that heats the screw itself by putting a heater in the screw is also possible.

（変形例２）
図４は、変形例２でキャピラリー式の可塑化射出装置６０である。図１のインラインスクリュ式の可塑化射出装置１と共通の機能、部位については共通の符号を用いて説明する。 (Modification 2)
FIG. 4 shows a capillary type plasticizing injection apparatus 60 according to the second modification. Functions and parts common to the inline screw type plasticizing injection apparatus 1 of FIG. 1 will be described using common reference numerals.

変形例２のキャピラリー式の可塑化射出装置６０では、炭素繊維を含有する熱可塑性樹脂２０は、シリンダ１０の側面に設けられた加熱筒６１に送られ、バンドヒータ６２により加熱されて、加熱筒６１内で溶融化する。溶融化した炭素繊維を含有する熱可塑性樹脂２０は、シリンダ１０内に溜まる。シリンダ１０内に溜まった熱可塑性樹脂２０は、ピストン６３により射出方向に射出される。   In the capillary type plasticizing injection apparatus 60 of the second modification, the thermoplastic resin 20 containing carbon fiber is sent to a heating cylinder 61 provided on the side surface of the cylinder 10 and heated by a band heater 62 to be heated. Melt in 61. The thermoplastic resin 20 containing the melted carbon fiber is accumulated in the cylinder 10. The thermoplastic resin 20 accumulated in the cylinder 10 is injected in the injection direction by the piston 63.

キャピラリー式の可塑化射出装置６０では、インラインスクリュ式の可塑化射出装置のように、スクリュの回転による炭素繊維の剪断による折損がなくなるため繊維長の長い樹脂製品が得られる。   In the capillary type plasticizing injection apparatus 60, unlike the inline screw type plasticizing injection apparatus, breakage due to shearing of carbon fibers due to the rotation of the screw is eliminated, so that a resin product having a long fiber length can be obtained.

本発明のインラインスクリュ式の可塑化射出装置である。It is an in-line screw type plasticizing injection apparatus of the present invention. 熱可塑性樹脂に含有する長繊維と短繊維の占める重量割合を示す。The weight ratio of the long fibers and the short fibers contained in the thermoplastic resin is shown. 変形例１のサイドフィード口を備えたインラインスクリュ式の可塑化射出装置である。It is an in-line screw type plasticizing injection apparatus provided with the side feed port of Modification 1. 変形例２のキャピラリ-式の可塑化射出装置である。6 is a capillary-type plasticizing injection apparatus according to a second modification.

符号の説明Explanation of symbols

１ 可塑化射出装置
１０ シリンダ
１１ スクリュ
２０ 熱可塑性樹脂
３０ 電磁誘導加熱装置
３１ コイル
４０ 温度検知センサ（温度検知手段） DESCRIPTION OF SYMBOLS 1 Plasticization injection apparatus 10 Cylinder 11 Screw 20 Thermoplastic resin 30 Electromagnetic induction heating apparatus 31 Coil 40 Temperature detection sensor (temperature detection means)

Claims (4)

シリンダとスクリュを備え、熱可塑性樹脂を供給する供給部と前記熱可塑性樹脂を圧縮する圧縮部を形成するインラインスクリュ式の可塑化射出装置であって、
前記熱可塑性樹脂は炭素繊維を含有し、
前記圧縮部及び前記供給部の少なくともいずれか一方に電磁誘導加熱装置が設けられ、
前記電磁誘導加熱装置は、前記炭素繊維を自己発熱させる、インラインスクリュ式の可塑化射出装置。 An in-line screw type plasticizing injection apparatus comprising a cylinder and a screw, forming a supply part for supplying a thermoplastic resin and a compression part for compressing the thermoplastic resin,
The thermoplastic resin contains carbon fiber,
An electromagnetic induction heating device is provided in at least one of the compression unit and the supply unit ,
The electromagnetic induction heating device is an in- line screw type plasticizing injection device that self-heats the carbon fiber . 前記電磁誘導加熱装置は、コイルと、前記コイルに電流を流す電源ユニットとを有し、The electromagnetic induction heating device includes a coil and a power supply unit that supplies current to the coil.
前記コイルは、前記シリンダの内周側に設けられる、請求項１に記載のインラインスクリュ式の可塑化射出装置。The in-line screw type plasticizing injection apparatus according to claim 1, wherein the coil is provided on an inner peripheral side of the cylinder. 前記圧縮部は前記熱可塑性樹脂の発熱を検知する温度検知手段を備え、前記温度検知手段からの信号で前記電磁誘導加熱装置をフィードバック制御することを特徴とする請求項１又は２に記載のインラインスクリュ式の可塑化射出装置。 3. The in-line according to claim 1, wherein the compression unit includes a temperature detection unit that detects heat generation of the thermoplastic resin, and feedback-controls the electromagnetic induction heating device with a signal from the temperature detection unit. Screw type plasticizing injection device. 前記炭素繊維の一部又は全部はロービングであることを特徴とする請求項１乃至請求項３のいずれかに記載のインラインスクリュ式の可塑化射出装置。 Inline screw plasticizing injection apparatus according to any one of claims 1 to 3, wherein the some or all of the carbon fibers roving.
JP2008293983A 2008-11-18 2008-11-18 Plasticizing injection device Expired - Fee Related JP5556003B2 (en)

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