JP6366058B2 - Molten material supply device provided with torpedo - Google Patents
Molten material supply device provided with torpedo Download PDFInfo
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- JP6366058B2 JP6366058B2 JP2014136495A JP2014136495A JP6366058B2 JP 6366058 B2 JP6366058 B2 JP 6366058B2 JP 2014136495 A JP2014136495 A JP 2014136495A JP 2014136495 A JP2014136495 A JP 2014136495A JP 6366058 B2 JP6366058 B2 JP 6366058B2
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Description
本発明は、トーピードが設けられた溶融材料供給装置に関するものである。 The present invention relates to a molten material supply apparatus provided with a torpedo.
従来、トーピードが設けられた溶融材料供給装置としては特許文献１および特許文献２に記載されたものが知られている。特許文献１は、最も一般的な形状のトーピードであって両側端部が尖がった紡錘形状をしている。トーピードの役割は、特許文献１の明細書の（０００７）にも記載されるように流動経路の断面積を小さくすることで樹脂材料のせん断速度を速くし、樹脂溶融の溶融を良好にするものである。 Conventionally, what was described in patent document 1 and patent document 2 is known as a molten material supply apparatus provided with the torpedo. Patent Document 1 is a torpedo having the most general shape, and has a spindle shape with sharp ends on both sides. The role of torpedo is to increase the shear rate of the resin material by reducing the cross-sectional area of the flow path as described in (0007) of the specification of Patent Document 1 and to improve the melting of the resin melt. It is.
しかしながら特許文献１は、トーピードの外側を溶融材料が通過していくのみであるので、断面積は減少による溶融効果はあるが、溶融材料の混練の点ではほとんど効果がない。前記のものに対して、特許文献２はノズルに挿嵌されたトーピードは、入口１４から供給口９，１０を通過した材料が凹部を流れて排出口１１，１２を通過して出口１５へ流動するように設けられている。そのため圧力損失を過度に増加させることなく溶融樹脂の混練状況を改善することが可能と記載されている。 However, in Patent Document 1, since the molten material only passes outside the torpedo, the cross-sectional area has a melting effect due to the reduction, but is hardly effective in terms of kneading the molten material. In contrast to the above, in Patent Document 2, in the torpedo inserted into the nozzle, the material that has passed through the supply ports 9 and 10 from the inlet 14 flows through the recesses and flows through the discharge ports 11 and 12 to the outlet 15. It is provided to do. Therefore, it is described that the kneading state of the molten resin can be improved without excessively increasing the pressure loss.
しかしながら特許文献２のトーピードも外側と内側の樹脂の流れが合流するわけではないので、溶融材料の混練がそれほど良好というわけではない。また特許文献２はノズルに設けられるものであり、加熱筒内に設けられることは想定されていないので、加熱筒との関係は何も記載されていない。 However, the torpedo of Patent Document 2 does not mean that the flow of the resin on the outer side and the inner side is merged, so that the kneading of the molten material is not so good. Moreover, since patent document 2 is provided in a nozzle and is not assumed to be provided in a heating cylinder, nothing is described regarding the relationship with the heating cylinder.
本発明では上記の問題を鑑みて、溶融材料供給部材の前方の流路の断面積を狭くするトーピードが設けられた溶融材料供給装置において、複数の流路からの溶融材料が合流して混練が良好になるようにした溶融材料供給装置を提供することを目的とする。 In the present invention, in view of the above problems, in the molten material supply apparatus provided with a torpedo that narrows the cross-sectional area of the flow path in front of the molten material supply member, the molten materials from a plurality of flow paths are joined and kneaded. It is an object of the present invention to provide a molten material supply device that is improved.
本発明の請求項１に記載の溶融材料供給装置は、加熱筒内に設けられた溶融材料供給部材の前方の流路の断面積を狭くするトーピードが設けられた溶融材料供給装置において、前記トーピードは溶融材料供給部材の側に凹部が形成され、前記凹部に連通して前記トービートの内部に形成される内部流路と、前記トーピードの外周側に形成される外周流路とが少なくとも一部において並行して設けられ、前記内部流路の少なくとも一部は前記外周流路に接続されていることを特徴とする。 The molten material supply apparatus according to claim 1 of the present invention is the molten material supply apparatus provided with a torpedo that narrows the cross-sectional area of the flow path in front of the molten material supply member provided in the heating cylinder. Has a recess formed on the side of the molten material supply member, and at least a part of an internal flow path formed in the toe beat in communication with the recess and an outer peripheral flow path formed on the outer peripheral side of the torpedo Provided in parallel , at least a part of the internal flow path is connected to the outer peripheral flow path .
本発明の請求項２に記載の溶融材料供給装置は、請求項１において、前記溶融材料供給部材の先端の円錐部はトーピードの凹部に挿入可能であることを特徴とする。 According to a second aspect of the present invention, there is provided the molten material supply apparatus according to the first aspect, wherein the conical portion at the tip of the molten material supply member can be inserted into the concave portion of the torpedo.
本発明の溶融材料供給装置は、加熱筒内に設けられた溶融材料供給部材の前方の流路の断面積を狭くするトーピードが設けられた溶融材料供給装置において、前記トーピードは溶融材料供給部材の側に凹部が形成され、前記凹部に連通して前記トービートの内部に形成される内部流路と、前記トーピードの外周側に形成される外周流路とが並行して設けられ、前記内部流路の少なくとも一部は前記外周流路に接続されているので、溶融材料の混合が良好になる。 The molten material supply apparatus of the present invention is a molten material supply apparatus provided with a torpedo that narrows the cross-sectional area of the flow path in front of the molten material supply member provided in the heating cylinder. recess is formed in the side, and an internal passage formed inside the Tobito communicates with the recess, an outer peripheral flow path formed on the outer peripheral side of the torpedo is provided in parallel, the internal passage Since at least a part of is connected to the outer peripheral flow path, the mixing of the molten material becomes good.
本発明の溶融材料供給装置について図１を参照して説明する。一例として本実施形態の溶融材料供給装置は、射出成形機１１の射出装置１２である。また射出成形機１１は射出装置１２の前方に型締装置１３が設けられ、その金型１４（固定金型）にノズル１５がタッチされるようになっている。射出装置１２については加熱筒１６の後方部近傍にハウジング部１７が設けられ、ハウジング部１７には材料供給孔１８や供給装置１９が設けられている。また加熱筒１６は軸方向に向けて内孔１６ａが設けられ、外周には各ゾーン毎に温度制御可能なヒータ２０が設けられている。また加熱筒１６の前方にはシリンダヘッド部２１が固定されている。シリンダヘッド部２１の内側面２１ａはテーパー状に縮径され、後部の大径部は加熱筒１６の内孔１６ａに接続され、前部の小径部はノズル１５のノズル孔１５ａに接続されている。本発明ではシリンダヘッド部２１も含めて加熱筒と称し、その内部の空洞部を加熱筒内と称する。また加熱筒１６は、ノズル１５側を前方と称し、ハウジング部１７を後方と称す。 The molten material supply apparatus of the present invention will be described with reference to FIG. As an example, the molten material supply device of the present embodiment is the injection device 12 of the injection molding machine 11. Further, the injection molding machine 11 is provided with a mold clamping device 13 in front of the injection device 12, and the nozzle 15 is touched to the mold 14 (fixed mold). As for the injection device 12, a housing portion 17 is provided in the vicinity of the rear portion of the heating cylinder 16, and a material supply hole 18 and a supply device 19 are provided in the housing portion 17. The heating cylinder 16 is provided with an inner hole 16a in the axial direction, and a heater 20 capable of controlling the temperature for each zone is provided on the outer periphery. A cylinder head portion 21 is fixed in front of the heating cylinder 16. The inner side surface 21a of the cylinder head portion 21 is tapered and the rear large diameter portion is connected to the inner hole 16a of the heating cylinder 16, and the front small diameter portion is connected to the nozzle hole 15a of the nozzle 15. . In the present invention, the cylinder head portion 21 is also referred to as a heating cylinder, and the hollow portion inside thereof is referred to as a heating cylinder. Moreover, the heating cylinder 16 calls the nozzle 15 side the front, and calls the housing part 17 back.
加熱筒１６の内孔１６ａにはスクリュ２２が設けられている。スクリュ２２は図示しない計量用モータにより回転可能に設けられ、また図示しない射出用モータにより前後進移動可能に設けられている。スクリュ２２の形状は、後方から順にフィードゾーン２３、コンプレッションゾーン２４、メタリングゾーン２５と軸部が太くなるように形成されている。スクリュ２２のフライトは同じピッチに形成されている。スクリュ２２の圧縮比については、これに限定されるものではないが、１．０〜２．０と比較的圧縮比を低くして、せん断力を小さくして繊維材料を用いる場合には切断を防止することが望ましい。またスクリュ２２は、サブフライト等の別のフライトのあるものや、細かい凹凸が形成されたミキシングゾーンが設けられたものでもよい。更にまた加熱筒１６の内部は、材料供給孔１８、加熱筒１６の中部ゾーン等から真空ポンプにより真空吸引されるようにしたものや窒素ガスを供給するようにしたものでもよい。 A screw 22 is provided in the inner hole 16 a of the heating cylinder 16. The screw 22 is rotatably provided by a metering motor (not shown), and is provided so as to be movable forward and backward by an injection motor (not shown). The shape of the screw 22 is formed so that the feed zone 23, the compression zone 24, the metering zone 25, and the shaft portion become thicker in order from the rear. The flights of the screws 22 are formed at the same pitch. The compression ratio of the screw 22 is not limited to this, but when the fiber material is used with a relatively low compression ratio of 1.0 to 2.0 and a small shear force, cutting is performed. It is desirable to prevent. Further, the screw 22 may have another flight such as a subflight, or may be provided with a mixing zone in which fine irregularities are formed. Furthermore, the inside of the heating cylinder 16 may be one that is vacuum-sucked by a vacuum pump from the material supply hole 18, the middle zone of the heating cylinder 16, or the like, or that is supplied with nitrogen gas.
またスクリュ２２の前方には逆流防止弁２６がスクリュ２２の軸部に対して前後進可能に設けられ、逆流防止弁２６が前方に移動した際には溶融材料が移動可能であり、逆流防止弁２６が後方に移動した際には溶融材料が前方から後方へ移動不可能となるようになっている。なお本発明において逆流防止弁２６は必須ではない。またスクリュ２２の逆流防止弁２６が設けられた部分の前方にはスクリュヘッド２７が設けられている。スクリュヘッド２７は円錐形状の円錐部からなっている。なおスクリュヘッド２７は後述するトーピード２８の凹部２９に嵌合されるものであれば、完全な円錐形状でなくてもよい。 Further, a backflow prevention valve 26 is provided in front of the screw 22 so as to be capable of moving back and forth with respect to the shaft portion of the screw 22, and the molten material can be moved when the backflow prevention valve 26 moves forward. When 26 moves rearward, the molten material cannot move from the front to the rear. In the present invention, the backflow prevention valve 26 is not essential. A screw head 27 is provided in front of the portion of the screw 22 where the backflow prevention valve 26 is provided. The screw head 27 comprises a conical cone portion. The screw head 27 does not have to be a complete conical shape as long as it fits into a concave portion 29 of a torpedo 28 described later.
加熱筒１６内に設けられた溶融材料供給部材であるスクリュ２２が最大限前方へ移動した位置（前進限）よりも更に前方の位置には、トーピード２８が設けられている。トーピード２８は、外周部３０の直径が加熱筒１６の内孔よりも小径となっており、トーピード２８の設けられた部分において加熱筒１６内の流路の断面積が狭くなっている。トーピード２８は、外側は円筒形をしており加熱筒１６の方向に長手方向を向けて固定されている。トーピード２８の取付方法は、加熱筒１６の内孔１６ａ側から軸芯側に向けて形成された図示しない複数の支持部により加熱筒１６内に固定支持されている。トーピード２８は溶融材料供給部材であるスクリュ２２の先端のスクリュヘッド２７の側が、テーパー状の凹部２９が形成されている。そして凹部２９に連通してトーピード２８の内部には内部流路３１が形成されている。ここでは内部流路３１は、トーピード２８の軸芯に沿って前方に向けて形成された直進部３１ａと、トーピード２８の前後方向の中央部分で、外周側に向けて４方向に向けて流路が形成された分岐部３１ｂからなっている。そして内部流路３１のうちの分岐部３１ｂは、トーピード２８の外周部３０のうちの円筒部３０ａに開口している。なお前記分岐部３１ｂの本数は２〜６が適切である。 A torpedo 28 is provided at a position further forward than a position (advancing limit) at which the screw 22 which is a molten material supply member provided in the heating cylinder 16 has moved forward as much as possible. In the torpedo 28, the diameter of the outer peripheral portion 30 is smaller than the inner hole of the heating cylinder 16, and the cross-sectional area of the flow path in the heating cylinder 16 is narrow at the portion where the torpedo 28 is provided. The torpedo 28 has a cylindrical shape on the outside and is fixed in the direction of the heating cylinder 16 with its longitudinal direction directed. The method for attaching the torpedo 28 is fixedly supported in the heating cylinder 16 by a plurality of support portions (not shown) formed from the inner hole 16a side of the heating cylinder 16 toward the shaft core side. In the torpedo 28, a tapered recess 29 is formed on the screw head 27 side at the tip of the screw 22 which is a molten material supply member. An internal flow path 31 is formed in the torpedo 28 in communication with the recess 29. Here, the internal flow path 31 is a linearly-advancing portion 31a formed forward along the axis of the torpedo 28 and a central portion in the front-rear direction of the torpedo 28, and the flow path is directed in four directions toward the outer peripheral side. It consists of the branch part 31b formed. The branch portion 31 b of the internal flow path 31 is open to the cylindrical portion 30 a of the outer peripheral portion 30 of the torpedo 28. In addition, 2-6 are suitable for the number of the said branch parts 31b.
なお図２の応用例に示されるようにトーピード２８の内部流路３１の分岐部３１ｂは、外周部３０のうちの前方の円錐部３０ｂに接続されるようにしてもよい。このことにより内部流路３１を流れる溶融樹脂が流動抵抗を受けにくくなる。また更に内部流路３１の直進部３１ａの数も一には限定されない。図３の更に別の応用例に示されるように、複数本の内部流路３１ｃがそれぞれ分岐しないで外周部３０に直接接続されるようにしてもよい。いずれにしても内部流路３１が外周部３０のいずれかの部分に開口されることにより、別途外周側に形成される外周流路３２との合流部を形成する。 As shown in the application example of FIG. 2, the branch portion 31 b of the internal flow path 31 of the torpedo 28 may be connected to the front conical portion 30 b of the outer peripheral portion 30. This makes it difficult for the molten resin flowing through the internal flow path 31 to receive flow resistance. Furthermore, the number of the rectilinear portions 31a of the internal flow path 31 is not limited to one. As shown in still another application example of FIG. 3, the plurality of internal flow paths 31 c may be directly connected to the outer peripheral portion 30 without branching. In any case, the internal flow path 31 is opened at any part of the outer peripheral portion 30, thereby forming a junction with the outer peripheral flow path 32 formed separately on the outer peripheral side.
またトーピード２８の外周部３０と加熱筒１６の内孔１６ａ（シリンダヘッド部２１の凹部２１ａ内を含む）との間には外周流路３２が形成されている。外周流路３２は前記支持部以外の部分はトーピード２８の後方から前方に向けて全周に形成されている。従ってトーピード２８の前後方向の中央よりも後ろの部分では内周流路３１と外周流路３２が少なくとも一部において並行して設けられることになる。なお内部流路３１は、凹部２９よりも前方で前記外周流路３２に接続されるものであればよい。また内周流路３１は、少なくとも一部が外周流路３２に接続されていればよく、一部の内周流路３１がトーピード２８の軸芯が貫通したものを除外するものではない。 An outer peripheral flow path 32 is formed between the outer peripheral portion 30 of the torpedo 28 and the inner hole 16a of the heating cylinder 16 (including the inside of the concave portion 21a of the cylinder head portion 21). The outer peripheral flow path 32 is formed on the entire circumference from the rear to the front of the torpedo 28 except for the support portion. Therefore, the inner circumferential flow path 31 and the outer circumferential flow path 32 are provided in parallel at least in part in a portion behind the center of the torpedo 28 in the front-rear direction. The internal flow path 31 may be connected to the outer peripheral flow path 32 in front of the recess 29. Further, it is sufficient that at least a part of the inner peripheral flow path 31 is connected to the outer peripheral flow path 32, and a part of the inner peripheral flow path 31 does not exclude a case where the shaft core of the torpedo 28 penetrates.
またトーピード２８の前後方向の中央は、円筒形であるが、それよりも更に前方のトーピード２８の全長に対して１／３〜１／１０程度の長さの部分は、シリンダヘッド側の凹部２１ａの形状に対応した円錐形状をした円錐部３０ｂ（突起部）となっている。また本実施形態では、トーピード２８の外周部３０の全域には複数の突部３３が形成されている。本実施形態では突部は溶融材料の流動方向に長手方向が向けられた楕円形状である。そしてトーピード２８の後方側よりも前方側のほうほど突部の数が増加するように形成されている。また円錐部３０ｂにも前記突部が形成されている。なお突部の形状は楕円形に限らず、円形、５角以上の多角形、長方形、三角形等でもよい。またトーピード２８の径を若干大きくして窪みを多数設けたものでもよい。また加熱筒１６の内孔１６ａの側に突部や凹凸を設けたものでもよい。更に本発明において突部は必須ではない。 The center of the torpedo 28 in the front-rear direction is cylindrical, but a portion about 1/3 to 1/10 of the total length of the torpedo 28 in front of the torpedo 28 is a recess 21a on the cylinder head side. This is a conical portion 30b (projection) having a conical shape corresponding to the shape. In the present embodiment, a plurality of protrusions 33 are formed on the entire outer peripheral portion 30 of the torpedo 28. In this embodiment, the protrusion has an elliptical shape whose longitudinal direction is directed in the flow direction of the molten material. And it forms so that the number of protrusions may increase toward the front side rather than the back side of the torpedo 28. The protrusion is also formed on the conical portion 30b. The shape of the protrusion is not limited to an ellipse, but may be a circle, a polygon having five or more corners, a rectangle, a triangle, or the like. Further, the torpedo 28 may have a slightly larger diameter and a large number of depressions. Further, the heating cylinder 16 may be provided with protrusions or irregularities on the inner hole 16a side. Furthermore, the protrusion is not essential in the present invention.
次に本実施形態の溶融材料供給装置である射出装置１２を用いた計量および射出（材料供給）ついて説明する。本実施形態で使用される材料は、ガラス繊維と熱可塑性のペレットが別々に供給されたものである。ただし熱可塑性のペレット自体にガラス繊維を含有したものでもよい。供給装置１９から材料供給孔１８を介して加熱筒１６内に供給され、溶融材料供給部材であるスクリュ２２が計量用モータの作動により回転されるとフィードゾーン２３、コンプレッションゾーン２４、メタリングゾーン２５の順に送られたガラス繊維と熱可塑性樹脂はメタリングゾーン２５でほぼ完全に溶融されて開放された逆流防止弁２６を介してスクリュ２２の前方に送られる。 Next, metering and injection (material supply) using the injection device 12 which is the molten material supply device of this embodiment will be described. The material used in this embodiment is one in which glass fibers and thermoplastic pellets are separately supplied. However, the thermoplastic pellet itself may contain glass fibers. When the screw 22 which is supplied from the supply device 19 through the material supply hole 18 and is rotated by the operation of the metering motor is rotated by the operation of the metering motor, the feed zone 23, the compression zone 24 and the metering zone 25. The glass fiber and the thermoplastic resin sent in this order are sent to the front of the screw 22 through the backflow prevention valve 26 which is almost completely melted and opened in the metering zone 25.
この際に溶融材料供給部であるスクリュ２２には射出用モータにより背圧が掛けられており、スクリュ２２の後退とともにトーピード２８の凹部２９の側とスクリュ２２のスクリュヘッド２７との間の間隔が広がりガラス繊維の含有した溶融樹脂（溶融材料）がその部分に貯留される。射出装置１２は、計量工程が終了すると、金型１４内の成形品が取り出されて再度型締がなされるまで待機する。そして次に射出工程が開始されると射出装置は射出モータが作動して、スクリュ２２を高速で前進させる。その結果溶融樹脂は、加熱筒１６内のトーピード２８の部分を介してノズル１５から金型１４内へ射出される。この際逆流防止弁２６は後方に移動してスクリュ先端側からフライト側への溶融樹脂の流動を遮断する。 At this time, a back pressure is applied to the screw 22 which is a molten material supply unit by an injection motor, and as the screw 22 moves backward, the distance between the concave 29 side of the torpedo 28 and the screw head 27 of the screw 22 is increased. The molten resin (molten material) contained in the spread glass fiber is stored in that portion. When the weighing process is completed, the injection device 12 waits until the molded product in the mold 14 is taken out and the mold is clamped again. When the injection process is started next, the injection device operates the injection motor to advance the screw 22 at a high speed. As a result, the molten resin is injected from the nozzle 15 into the mold 14 through the torpedo 28 in the heating cylinder 16. At this time, the backflow prevention valve 26 moves rearward and blocks the flow of the molten resin from the screw tip side to the flight side.
射出の際、ガラス繊維の含有した溶融樹脂はトーピード２８の内部流路３１と外周流路３２から並行して前方に送られる。そしてトーピード２８の前後方向のほぼ中央部分で内部流路３１の分岐流路３１ｂは前記外周流路３２に接続されていることから、内部流路３１と外周流路３２から送られてきた溶融樹脂は合流して混合される。しかしそれに対して特許文献２ではこういった流れは起きない。またトーピード２８の外周部３０の円筒部３０ａや円錐部３０ｂにも突部３３や凹部が形成されることにより、トーピード２８の後方から前方へ溶融樹脂が送られるうちに良好に混合がなされる。そしてスクリュ２２が前進される圧力によりトーピード２８の前方からノズル孔１５ａを介して金型１４のキャビティ内に溶融樹脂が射出充填される。またスクリュヘッド２７はトーピード２８の凹部２９内に収納される形で射出および保圧が終了する場合が多い。従ってトーピード２８の後方部分に溶融樹脂が滞留しにくい。 At the time of injection, the molten resin contained in the glass fiber is fed forward from the inner channel 31 and the outer channel 32 of the torpedo 28 in parallel. Since the branch flow path 31b of the internal flow path 31 is connected to the outer peripheral flow path 32 at a substantially central portion in the front-rear direction of the torpedo 28, the molten resin sent from the internal flow path 31 and the outer peripheral flow path 32. Are merged and mixed. However, in Patent Document 2, such a flow does not occur. Further, the protrusions 33 and the concave portions are also formed in the cylindrical portion 30a and the conical portion 30b of the outer peripheral portion 30 of the torpedo 28, so that the molten resin is satisfactorily mixed while the molten resin is sent from the rear to the front. The molten resin is injected and filled into the cavity of the mold 14 from the front of the torpedo 28 through the nozzle hole 15a by the pressure at which the screw 22 is advanced. In many cases, the screw head 27 is stored in the recess 29 of the torpedo 28 and the injection and pressure holding are finished. Accordingly, it is difficult for the molten resin to stay in the rear portion of the torpedo 28.
次に図４の別の実施形態の溶融材料供給装置５１のトーピード５２について説明する。図４の溶融材料供給装置５１は、図示しない可塑化装置が別に設けられたプランジャ装置５３であり、可塑化装置とは連絡通路５４で接続されている。そしてプランジャ装置５３の加熱筒５５内には溶融材料供給部材であるピストン（プランジャ）５６が前後進可能に内蔵されている。図４では、トーピード５２は、加熱筒５５内（シリンダヘッドを含む）には設けられておらず、その全部またはほとんど全部がノズル５７内に設けられている。トーピード５２の形状としては、図１ないし図３に記載されたものやそれらの技術思想を有するものが採用可能であり、トーピード５２の部分には内部流路５８と外部流路５９が並行して設けられる。またトーピード５２の後方部分は凹部６０となっていて内部流路５８に連通されている。またスクリュが設けられた射出成形機において図４のノズル内のトーピードを設けてもよい。 Next, the torpedo 52 of the molten material supply apparatus 51 of another embodiment of FIG. 4 will be described. The molten material supply device 51 of FIG. 4 is a plunger device 53 provided with a plasticizing device (not shown) separately, and is connected to the plasticizing device by a communication passage 54. A piston (plunger) 56, which is a molten material supply member, is built in the heating cylinder 55 of the plunger device 53 so as to be able to move forward and backward. In FIG. 4, the torpedo 52 is not provided in the heating cylinder 55 (including the cylinder head), and all or almost all of it is provided in the nozzle 57. As the shape of the torpedo 52, those described in FIG. 1 to FIG. 3 and those having the technical idea thereof can be adopted. In the torpedo 52, an internal channel 58 and an external channel 59 are provided in parallel. Provided. The rear portion of the torpedo 52 is a recess 60 and communicates with the internal flow path 58. Moreover, you may provide the torpedo in the nozzle of FIG. 4 in the injection molding machine provided with the screw.
本発明については、一々列挙はしないが、上記した本実施形態のものに限定されず、当業者が本発明の趣旨を踏まえて変更を加えたものについても、適用されることは言うまでもないことである。図４に記載したように溶融材料供給装置の溶融材料供給部材についてはスクリュ以外に回転不能なプランジャでもよい。その場合、トーピードの後方とプランジャの間に別の可塑化装置から溶融材料流路が接続され、溶融材料供給部材であるプランジャの前に貯留されることが一般的である。またはスクリュインプランジャ装置の構造のものでもよい。 The present invention is not enumerated one by one, but is not limited to that of the above-described embodiment, and it goes without saying that those skilled in the art also apply modifications made in accordance with the spirit of the present invention. is there. As shown in FIG. 4, the molten material supply member of the molten material supply device may be a non-rotatable plunger other than the screw. In that case, it is common that a molten material flow path is connected from another plasticizer between the rear of the torpedo and the plunger, and is stored in front of the plunger which is a molten material supply member. Alternatively, a screw plunger device structure may be used.
溶融材料供給装置の溶融材料供給部材であるスクリュについては回転のみ可能であって、前後進不能な押出機のスクリュであってもよい。その場合であっても、溶融材料は、前記トーピードの凹部に連通される内部流路と、トーピードと外周部との間に形成される外周流路との間を通過して前方へ継続的に供給され、その間に混合がなされる。溶融材料供給装置により溶融される材料は、熱可塑性または熱硬化性の樹脂に炭素繊維、ガラス繊維等の繊維材料を混ぜたものを混合することを主な目的とするが、樹脂同士の混合を良好にするものでもよく、一部または全部が樹脂以外の材料を混合するものでもよい。 About the screw which is a molten material supply member of a molten material supply apparatus, only the rotation is possible, and the screw of the extruder which cannot advance back and forth may be sufficient. Even in such a case, the molten material continuously passes forward between the internal flow passage communicating with the concave portion of the torpedo and the outer peripheral flow passage formed between the torpedo and the outer peripheral portion. Are fed and mixing is made during that time. The material to be melted by the molten material supply device is mainly intended to mix a thermoplastic or thermosetting resin mixed with a fiber material such as carbon fiber or glass fiber. It may be good, or part or all may be mixed with a material other than resin.
１１ 射出成形機
１２ 射出装置（溶融材料供給装置）
１６ 加熱筒
１６ａ 内孔
２２ スクリュ
２８ トーピード
２９ 凹部
３０ 外周部
３１ 内部流路
３２ 外周流路
11 Injection molding machine 12 Injection device (molten material supply device)
16 Heating cylinder 16a Inner hole 22 Screw 28 Torpedo 29 Recess 30 Outer peripheral part 31 Internal flow path 32 Peripheral flow path
Claims (2)
前記トーピードは溶融材料供給部材の側に凹部が形成され、
前記凹部に連通して前記トービートの内部に形成される内部流路と、前記トーピードの外周側に形成される外周流路とが少なくとも一部において並行して設けられ、
前記内部流路の少なくとも一部は前記外周流路に接続されていることを特徴とする溶融材料供給装置。 In the molten material supply apparatus provided with a torpedo that narrows the cross-sectional area of the flow path ahead of the molten material supply member provided in the heating cylinder,
The torpedo has a recess formed on the side of the molten material supply member,
An internal flow path formed inside the toe beat in communication with the recess and an outer peripheral flow path formed on the outer peripheral side of the torpedo are provided in parallel at least in part,
At least a part of the internal flow path is connected to the outer peripheral flow path .
The molten material supply device according to claim 1 , wherein a conical portion at a tip of the molten material supply member can be inserted into a concave portion of a torpedo.
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| JPS6037777B2 (en) * | 1981-01-29 | 1985-08-28 | 東芝機械株式会社 | Torpedo used for marble pattern molding |
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