JP2009149106A - Multi-material injection molding machine and control method of multi-material injection machine - Google Patents

Multi-material injection molding machine and control method of multi-material injection machine Download PDF

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JP2009149106A
JP2009149106A JP2009089023A JP2009089023A JP2009149106A JP 2009149106 A JP2009149106 A JP 2009149106A JP 2009089023 A JP2009089023 A JP 2009089023A JP 2009089023 A JP2009089023 A JP 2009089023A JP 2009149106 A JP2009149106 A JP 2009149106A
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mold
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molding machine
injection molding
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JP4827946B2 (en
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Goshun Nishino
悟春 西野
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Meiki Seisakusho KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-material injection molding machine whose pivot mold can be moved by a servomotor. <P>SOLUTION: The multi-material injection molding machine molds a multi-material molded article using a die composed of a fixed mold 10, a movable mold 9 and a pivot mold 11 which pivots between the fixed mold 10 and the movable mold 9. In this case, the machine is further equipped with a first injection device 2 which contacts the fixed mold 10 and injects the molten material, a second injection device 30 which contacts the movable mold 9 and injects the molten material, a servomotor and ball screw assisted moving means 13 of the pivot mold 11, and a pressure tightening means 4 which pressure tightens the fixed mold 10 and the movable mold 9 through the pivot mold 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、固定型、可動型、及び、固定型と可動型との間で回動する回動型からなる金型を用いて多材質成形品を成形する射出成形機およびその制御方法に関するものである。   The present invention relates to an injection molding machine that molds a multi-material molded article using a fixed mold, a movable mold, and a mold including a rotating mold that rotates between the fixed mold and the movable mold, and a control method thereof. It is.

本発明の技術分野における特許文献としては特許文献１がある。特許文献１は、ベッドに固設した支持体に水平軸又は鉛直軸を中心として回転自在に軸支され、かつ両側面に金型を保持する回転盤と、同回転盤の両側に対向して配設され、型開閉シリンダによって前記回転盤の金型に対して進退し、かつ前記回転盤に対向する面に一次金型又は二次金型を有する可動盤と、同可動盤の１つに固定され先端にねじ又は平行溝を有する複数のタイバーと、同タイバーのねじ又は平行溝と噛合できる割りナットと、同割りナットを開閉する開閉装置と、前記１つの可動盤に対向する他の可動盤に設けられた型締シリンダと、前記一次金型及び二次金型に対応する射出装置よりなり、前記タイバーは前記支持体に設けた孔を摺動自在に貫通し、更に型閉じ時には前記型締シリンダのラムの軸心部に設けた孔も貫通して外側に突出し、前記割りナットと噛合できるように構成した。   There is Patent Document 1 as a patent document in the technical field of the present invention. Patent Document 1 discloses a rotating disk that is supported on a support fixed to a bed so as to be rotatable about a horizontal axis or a vertical axis, and that holds molds on both sides, and faces both sides of the rotating disk. A movable plate having a primary mold or a secondary mold on a surface opposed to the mold of the rotating plate and moved forward and backward with respect to the mold of the rotating plate by a mold opening / closing cylinder; and one of the movable plates A plurality of tie bars that are fixed and have screws or parallel grooves at the tip, a split nut that can mesh with the screws or parallel grooves of the tie bar, an opening and closing device that opens and closes the split nut, and another movable that faces the one movable platen A mold clamping cylinder provided on the board, and an injection device corresponding to the primary mold and the secondary mold, and the tie bar slidably penetrates a hole provided in the support, and further when the mold is closed The hole provided in the axial center of the ram of the clamping cylinder also penetrates. It protrudes outwardly, and configured to allow the split nut engaged.

しかしながら、特許文献１の射出成形機は、回転盤は移動せずその両側の可動盤が射出装置とともに移動する構成であり、極めて複雑であって、汎用の射出成形機とは全く異なるものである。したがって、一材質の成形品用の汎用射出成形機を改造して多材質射出成形機とすることは不可能であった。   However, the injection molding machine of Patent Document 1 has a configuration in which the rotating disc does not move and the movable plates on both sides thereof move together with the injection device, and is extremely complicated and completely different from a general-purpose injection molding machine. . Therefore, it is impossible to modify a general-purpose injection molding machine for a single-material molded product to make a multi-material injection molding machine.

また、可動盤は、回転盤に対してベッドを介して接近・離隔移動し、可動盤と回転盤とはベッドを介して間接的に支持されるので、可動盤と回転盤との間の平行度は低下する。   In addition, the movable plate moves toward and away from the rotating plate via the bed, and since the movable plate and the rotating plate are indirectly supported via the bed, the parallel between the movable plate and the rotating plate is possible. The degree drops.

特開平６−２５４９０６号公報JP-A-6-254906

本発明は、上記した問題を解決すべくなされたものであって、回動型をサーボモータにより移動可能な多材質射出成形機を提供することを目的とする。 The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a multi-material injection molding machine in which a rotary mold can be moved by a servo motor .

本発明は、固定型、可動型、及び、固定型と可動型との間で回動する回動型からなる金型を用いて多材質成形品を成形する射出成形機であって、
前記固定型に当接して溶融材料を射出する第１射出装置と、前記可動型に当接して溶融材料を射出する第２射出装置と、サーボモータおよびボールネジによる回動型の移動手段と、前記回動型を介して前記固定型と前記可動型を圧締する圧締手段とからなることを特徴とする多材質射出成形機に関する。 The present invention is an injection molding machine that molds a multi-material molded article using a mold comprising a fixed mold, a movable mold, and a rotating mold that rotates between the fixed mold and the movable mold.
A first injection device for injecting a molten material in contact with the fixed mold; a second injection device for injecting a molten material in contact with the movable mold; a rotary type moving means by a servo motor and a ball screw ; The present invention relates to a multi-material injection molding machine comprising pressing means for pressing the fixed mold and the movable mold through a rotating mold.

本発明の多材質射出成形機によれば、前記固定型に当接して溶融材料を射出する第１射出装置と、前記可動型に当接して溶融材料を射出する第２射出装置と、サーボモータおよびボールネジによる回動型の移動手段と、前記回動型を介して前記固定型と前記可動型を圧締する圧締手段を備えるので、サーボモータにより回動型を移動することができる。 According to the multi-material injection molding machine of the present invention, the first injection device that injects the molten material in contact with the fixed mold, the second injection device that injects the molten material in contact with the movable mold, and the servo motor. And a rotary type moving means using a ball screw and a pressing means for pressing the fixed mold and the movable type via the rotary type, the rotary type can be moved by a servo motor .

図１は、本発明の多材質射出成形機の正面図である。FIG. 1 is a front view of a multi-material injection molding machine according to the present invention. 図２は、本発明の多材質射出成形機の平面図である。FIG. 2 is a plan view of the multi-material injection molding machine of the present invention. 図３は、図１におけるＡ−Ａ矢視断面図である。FIG. 3 is a cross-sectional view taken along the line AA in FIG.

図面に基づいて、本発明の実施の形態を詳細に説明する。図１は、本発明の多材質射出成形機の正面図である。図２は、本発明の多材質射出成形機の平面図である。図３は、図１におけるＡ−Ａ矢視断面図である。   Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a multi-material injection molding machine according to the present invention. FIG. 2 is a plan view of the multi-material injection molding machine of the present invention. FIG. 3 is a cross-sectional view taken along the line AA in FIG.

本発明の多材質射出成形機は、可動盤７、タイバ５、固定盤８、エジェクタ手段２６、型開閉手段３１、圧締手段４、係合手段６、可動型９、固定型１０、回動型１１及び回動型支持装置３からなる型締装置１と、固定型１０に当接する第１射出装置２と、可動型９に当接する第２射出装置３０とから構成される。   The multi-material injection molding machine of the present invention includes a movable platen 7, tie bar 5, fixed platen 8, ejector means 26, mold opening / closing means 31, pressing means 4, engaging means 6, movable mold 9, fixed mold 10, and rotation. The mold clamping device 1 includes a mold 11 and a rotary mold support device 3, a first injection device 2 that contacts the fixed mold 10, and a second injection device 30 that contacts the movable mold 9.

可動盤７は、可動型９を取付け、回動型支持装置３に取付けられた回動型１１に対して、型開閉手段３１により、接近離隔移動する。固定盤８は、固定型１０と回動型支持装置３を取付け、回動型１１を固定型１０に対して、移動手段１３により、接近離隔移動させる。移動手段１３は、シリンダ２７とシリンダ２７に往復動自在に嵌挿されたピストン２９とからなる。なお移動手段１３は、サーボモータやボールネジ等から構成されたものでもよい。   The movable platen 7 is attached to the movable die 9 and moves toward and away from the rotary die 11 attached to the rotary type support device 3 by the die opening / closing means 31. The stationary platen 8 is attached with the stationary mold 10 and the rotational support device 3, and the rotational mold 11 is moved toward and away from the stationary mold 10 by the moving means 13. The moving means 13 includes a cylinder 27 and a piston 29 that is fitted into the cylinder 27 so as to be reciprocally movable. The moving means 13 may be constituted by a servo motor, a ball screw or the like.

型開閉手段３１と移動手段１３により、可動型９及び回動型１１並びに回動型１１及び固定型１０が当接して型合わせされたとき、係合手段６はタイバ５と固定盤８とを係合させる。そして、四の圧締手段４により回動型１１を介して可動型９と固定型１０を圧締する。圧締手段４は、タイバ５を牽引する油圧シリンダ装置であり、四の圧締装置４をそれぞれ個別のサーボ弁で制御することにより、可動型９を回動型１１に対して移動速度と圧締力を平行に制御することができる。なお、圧締手段４は、可動盤７に設けられているが、固定盤に設けるように構成することもできる。また、係合手段６は、固定盤８に設けられているが、可動盤に設けるように構成することもできる。   When the movable mold 9 and the rotary mold 11 and the rotary mold 11 and the fixed mold 10 are brought into contact with each other by the mold opening / closing means 31 and the moving means 13, the engaging means 6 moves the tie bar 5 and the fixed platen 8 together. Engage. Then, the movable mold 9 and the fixed mold 10 are clamped by the four pressing means 4 via the rotating mold 11. The clamping means 4 is a hydraulic cylinder device that pulls the tie bar 5, and each of the four clamping devices 4 is controlled by an individual servo valve, thereby moving the movable die 9 relative to the rotary die 11 with the moving speed and pressure. The tightening force can be controlled in parallel. In addition, although the pressing means 4 is provided in the movable board 7, it can also be comprised so that it may be provided in a fixed board. Further, although the engaging means 6 is provided on the fixed platen 8, it can be configured to be provided on the movable platen.

回動型支持装置３は、固定盤８の上端面に固着した上ホルダ１４と、上ホルダ１４に固着した移動手段１３と、移動手段１３の進退するロッド２８に固着した上移動部材１６と、上移動部材１６を上ホルダ１４の内側面で案内させるリニアガイド３２と、上移動部材１６の下面中央部で回動自在に軸支される上軸２０と、上軸２０の下面に固着した上盤１８と、固定盤８の下端面に固着した下ホルダ１５と、下ホルダ１５に固着した移動手段１３と、移動手段１３の進退するロッド２８に固着した下移動部材１７と、下移動部材１７を下ホルダ１５の上面で案内させるリニアガイド３３と、下移動部材１７の上面中央部で回動自在に軸支される下軸２１と、下軸２１の上面に固着した下盤１９と、下軸２１を回動させる回動手段１２とからなる。回動手段１２は、下軸２１の下端部に固着したピニオン２３と、ピニオン２３に歯合するラック２４と、ラック２４を往復駆動し下移動部材１７の側面に固着したシリンダ手段２５とからなる。なお、回動手段１２は、シリンダ手段２５とラック２４に代えて、ピニオン２３を電気又は油圧のモータで回動又は回転させるようにしてもよい。   The rotary support device 3 includes an upper holder 14 fixed to the upper end surface of the fixed platen 8, a moving means 13 fixed to the upper holder 14, an upper moving member 16 fixed to a rod 28 that moves forward and backward of the moving means 13, A linear guide 32 that guides the upper moving member 16 on the inner surface of the upper holder 14, an upper shaft 20 that is pivotally supported at the center of the lower surface of the upper moving member 16, and an upper surface fixed to the lower surface of the upper shaft 20. The lower plate 15, the lower holder 15 fixed to the lower end surface of the fixed plate 8, the moving means 13 fixed to the lower holder 15, the lower moving member 17 fixed to the rod 28 that moves forward and backward of the moving means 13, and the lower moving member 17 Is guided by the upper surface of the lower holder 15, the lower shaft 21 is pivotally supported at the center of the upper surface of the lower moving member 17, the lower board 19 fixed to the upper surface of the lower shaft 21, Rotating means 12 for rotating the shaft 21 . The rotating means 12 includes a pinion 23 fixed to the lower end portion of the lower shaft 21, a rack 24 that meshes with the pinion 23, and a cylinder means 25 that reciprocates the rack 24 and is fixed to the side surface of the lower moving member 17. . The rotating means 12 may be configured to rotate or rotate the pinion 23 with an electric or hydraulic motor instead of the cylinder means 25 and the rack 24.

上盤１８及び下盤１９は、回動型１１が容易に進入可能な距離を隔てて対向しており、型合わせ時における型開閉方向の一方の端部はＬ字状に対向面側に屈曲している。該Ｌ字状部は、回動型１１を上盤１８及び下盤１９の間へストッパ３４に当接するまで挿入する際の案内ともなる。そして、上盤１８及び下盤１９の他方の端部には回動型１１を上盤１８及び下盤１９に着脱させるクランプ手段２２が設けられている。クランプ手段２２は、回動型１１の上下端部を前記Ｌ字状部に押圧させる爪と、爪の支点を上盤１８及び下盤１９の端面に軸支するピンと、爪の他端に揺動自在に取付けられ上盤１８及び下盤１９の上下面に固着されたシリンダ手段とからなる。上盤１８及び下盤１９に固着された回動型１１は、シリンダ手段２５により進退するラック２４に歯合するピニオン２３の回動に伴い、１８０度の回動を繰り返すことができる。   The upper board 18 and the lower board 19 are opposed to each other with a distance that allows the rotary mold 11 to easily enter, and one end portion in the mold opening / closing direction at the time of mold matching is bent in an L shape toward the facing surface. is doing. The L-shaped part also serves as a guide for inserting the rotary mold 11 between the upper board 18 and the lower board 19 until they contact the stopper 34. Clamping means 22 for attaching and detaching the rotary mold 11 to and from the upper board 18 and the lower board 19 is provided at the other end of the upper board 18 and the lower board 19. The clamping means 22 includes a claw that presses the upper and lower ends of the rotary mold 11 against the L-shaped part, a pin that pivotally supports the claw fulcrum on the end surfaces of the upper board 18 and the lower board 19, and a rocker on the other end of the claw The cylinder means is movably attached and fixed to the upper and lower surfaces of the upper board 18 and the lower board 19. The rotation type 11 fixed to the upper board 18 and the lower board 19 can repeat the rotation of 180 degrees as the pinion 23 meshes with the rack 24 that moves forward and backward by the cylinder means 25.

次に、本発明の多材質射出成形機による射出成形について説明する。第１射出装置２及び第２射出装置３０は、それぞれ、互いに異なる色又は材質の材料が可塑化されて溶融材料として射出に備えて貯留されている。   Next, injection molding by the multi-material injection molding machine of the present invention will be described. In the first injection device 2 and the second injection device 30, materials of different colors or materials are plasticized and stored as a molten material for injection.

圧締手段４により圧締された固定型１０と回動型１１とで形成される第１キャビティへ第１射出装置２から溶融材料が射出されるとともに、圧締手段４により圧締された可動型９と回動型１１とで形成される第２キャビティへ第２射出装置３０から溶融材料が射出される。両キャビティへ射出充填された溶融材料が冷却又は加熱されて固化又は硬化した後、係合手段６のタイバ５との係合を解除し、型開閉手段３１で可動型９を回動型１１から離隔させるとともに、移動手段１３によって回動型１１を固定型１０から離隔させる。第１キャビティで成形された成形品はキャビティから離型されて取出される。   The molten material is injected from the first injection device 2 into the first cavity formed by the fixed mold 10 and the rotary mold 11 that are clamped by the clamping means 4, and the movable material that is clamped by the clamping means 4. The molten material is injected from the second injection device 30 into the second cavity formed by the mold 9 and the rotating mold 11. After the molten material injected and filled into both cavities is cooled or heated to solidify or harden, the engagement means 6 is disengaged from the tie bar 5, and the movable mold 9 is moved from the rotary mold 11 by the mold opening / closing means 31. At the same time, the rotating mold 11 is separated from the fixed mold 10 by the moving means 13. The molded product molded in the first cavity is released from the cavity and taken out.

回動型１１を１８０度回動させる。このとき第２キャビティで成形された中間成形品は、回動型１１に付着したまま第１キャビティへ持ち込まれる。そして、回動型１１を介して固定型１０と可動型９を再度圧締し、射出する。このとき、第１キャビティでは、中間成形品に重ねて第１射出装置２の溶融材料が射出されて最終製品である成形品が成形される。なお、中間成形品を第１キャビティで成形し、成形品を第２キャビティで成形することも可能である。   The rotary mold 11 is rotated 180 degrees. At this time, the intermediate molded product molded in the second cavity is brought into the first cavity while adhering to the rotary mold 11. Then, the fixed mold 10 and the movable mold 9 are pressed again via the rotating mold 11 and injected. At this time, in the first cavity, the molten material of the first injection device 2 is injected over the intermediate molded product to form a final product. It is also possible to mold the intermediate molded product in the first cavity and mold the molded product in the second cavity.

この発明は以上説明した実施例に限定されるものではなく、発明の趣旨を逸脱しない範囲内において種々の変更を付加して実施することができる。例えば、本実施の形態では、回動型支持装置の回動する軸は垂直である場合について説明したが、回動型支持装置の回動する軸を水平になるように設けてもよい。そのようにすれば、金型の上方が開放され、金型の着脱が容易となる。   The present invention is not limited to the embodiments described above, and various modifications can be added and implemented without departing from the spirit of the invention. For example, in the present embodiment, the rotating shaft of the rotating support device has been described as being vertical, but the rotating shaft of the rotating support device may be provided to be horizontal. If it does so, the upper part of a metal mold | die will be open | released and attachment / detachment of a metal mold | die will become easy.

１ 型締装置
２ 第１射出装置
３ 回動型支持装置
４ 圧締手段
５ タイバ
６ 係合手段
７ 可動盤
８ 固定盤
９ 可動型
１０ 固定型
１１ 回動型
１２ 回動手段
１３ 移動手段
１４ 上ホルダ
１５ 下ホルダ
１６ 上移動部材
１７ 下移動部材
１８ 上盤
１９ 下盤
２０ 上軸
２１ 下軸
２２ クランプ手段
２３ ピニオン
２４ ラック
２５ シリンダ手段
２６ エジェクタ装置
２７ シリンダ
２８ ロッド
２９ ピストン
３０ 第２射出装置
３１ 型開閉手段
３２，３３ リニアガイド
３４ ストッパ DESCRIPTION OF SYMBOLS 1 Mold clamping apparatus 2 1st injection apparatus 3 Rotation type support apparatus 4 Pressure clamping means 5 Tie bar 6 Engagement means 7 Movable board 8 Fixed board 9 Movable mold 10 Fixed mold 11 Rotation type 12 Rotation means 13 Moving means 14 On Holder 15 Lower holder 16 Upper moving member 17 Lower moving member 18 Upper plate 19 Lower plate 20 Upper shaft 21 Lower shaft 22 Clamping means 23 Pinion 24 Rack 25 Cylinder means 26 Ejector device 27 Cylinder 28 Rod 29 Piston 30 Second injection device 31 type Opening and closing means 32, 33 Linear guide 34 Stopper

Claims (4)

固定型、可動型、及び、固定型と可動型との間で回動する回動型からなる金型を用いて多材質成形品を成形する射出成形機であって、
前記固定型に当接して溶融材料を射出する第１射出装置と、前記可動型に当接して溶融材料を射出する第２射出装置と、サーボモータおよびボールネジによる回動型の移動手段と、前記回動型を介して前記固定型と前記可動型を圧締する圧締手段とからなることを特徴とする多材質射出成形機。 An injection molding machine that molds a multi-material molded product using a fixed mold, a movable mold, and a mold including a rotating mold that rotates between the fixed mold and the movable mold,
A first injection device for injecting a molten material in contact with the fixed mold; a second injection device for injecting a molten material in contact with the movable mold; a rotary type moving means by a servo motor and a ball screw ; A multi-material injection molding machine comprising: a clamping means for clamping the fixed mold and the movable mold through a rotating mold. 前記移動手段は、回動型を固定型に対して接近離隔移動させることを特徴とする請求項１に記載の多材質射出成形機。 The multi-material injection molding machine according to claim 1, wherein the moving unit moves the rotating mold toward and away from the fixed mold . 前記圧締手段は、移動速度と圧締力を制御することを特徴とする請求項１または請求項２に記載の多材質射出成形機。The multi-material injection molding machine according to claim 1 or 2, wherein the pressing means controls a moving speed and a pressing force. 固定型、可動型、及び、固定型と可動型との間で回動する回動型からなる金型を用いて多材質成形品を成形する射出成形機の制御方法であって、A control method for an injection molding machine that molds a multi-material molded product using a mold comprising a fixed mold, a movable mold, and a rotating mold that rotates between the fixed mold and the movable mold,
前記固定型に当接して溶融材料を射出する第１射出装置と、前記可動型に当接して溶融材料を射出する第２射出装置と、サーボモータおよびボールネジによる回動型の移動手段と、前記回動型を介して前記固定型と前記可動型を圧締する圧締手段とが設けられ、サーボモータにより回動型を固定金型から離隔させることを特徴とする多材質射出成形機の制御方法。A first injection device for injecting a molten material in contact with the fixed mold; a second injection device for injecting a molten material in contact with the movable mold; a rotary type moving means by a servo motor and a ball screw; Control of a multi-material injection molding machine characterized in that a clamping means for clamping the fixed mold and the movable mold through a rotating mold is provided, and the rotating mold is separated from the fixed mold by a servo motor. Method.
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