JP2013132812A - Injection molding machine for multi-material molding, and its molding method - Google Patents
Injection molding machine for multi-material molding, and its molding method Download PDFInfo
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Abstract
Description
本発明は、第1の金型が取付け可能な第1の盤と第2の金型が取付け可能な第2の盤との間に、型開閉方向と直交する方向の軸を中心に回転され中間金型が取付け可能な回転盤が設けられた多材成形品の射出成形機およびその成形方法に関するものである。 According to the present invention, the first plate on which the first mold can be attached and the second plate on which the second die can be attached are rotated around an axis perpendicular to the mold opening / closing direction. The present invention relates to an injection molding machine for multi-material molded products provided with a turntable to which an intermediate mold can be attached, and a molding method therefor.
第1の金型が取付け可能な第1の盤と第2の金型が取付け可能な第2の盤との間に、型開閉方向と直交する方向の軸を中心に回転され中間金型が取付け可能な回転盤が設けられた多材成形品の射出成形機としては、特許文献1ないし特許文献4に記載されたものが知られている。そのうち特許文献1ないし特許文献3に記載のタイプのものは、固定盤と中間金型を回転可能に設けた回転盤と可動盤が順に並べられ、前記回転盤と可動盤がそれぞれ型開閉方向に移動可能に設けられたものであり、特許文献4は、中央に中間金型を回転可能に設けた固定盤が配置され、その両側に型開閉方向に移動可能な可動盤が配置されたものである。また前記特許文献2は、射出装置の配置が相違しており、1本の射出装置が型開閉方向と直交する方向に向けて取付けられている。これら特許文献1と特許文献4は、型締装置の型開閉方向の外側に第1の射出装置と第2の射出装置が設けられている。また特許文献2と特許文献3は、特許文献2、特許文献3に記載された多材成形品の射出成形機は、一方の射出装置が型開閉方向と直交する方向に向けて取付けられている。 The intermediate mold is rotated about an axis perpendicular to the mold opening / closing direction between the first board to which the first mold can be attached and the second board to which the second mold can be attached. As an injection molding machine of a multi-material molded product provided with an attachable turntable, those described in Patent Document 1 to Patent Document 4 are known. Among them, the types described in Patent Document 1 to Patent Document 3 are arranged such that a rotating plate and a movable plate in which a fixed plate and an intermediate mold are rotatable are arranged in order, and the rotating plate and the movable plate are respectively in the mold opening / closing direction. In Patent Document 4, a fixed plate having an intermediate mold rotatably provided is arranged at the center, and a movable plate movable in the mold opening / closing direction is arranged on both sides thereof. is there. Moreover, the arrangement of the injection device is different in Patent Document 2, and one injection device is attached in a direction orthogonal to the mold opening / closing direction. In these Patent Document 1 and Patent Document 4, the first injection device and the second injection device are provided outside the mold opening / closing direction of the mold clamping device. Further, in Patent Document 2 and Patent Document 3, the injection molding machine for a multi-material molded product described in Patent Document 2 and Patent Document 3 is attached so that one injection device is directed in a direction orthogonal to the mold opening / closing direction. .
そのため特許文献1および特許文献4の多材成形品の射出成形機のほうが縦方向に装置が収まるため、工場設置のレイアウトが行いやすいという利点がある。そして特許文献1および特許文献4のタイプの多材成形品の射出成形機のほうが普及している。一方多材成形品の射出装置を用いて3材が異なる樹脂の成形を行うことはどの文献にも記載がない。僅かに特許文献3には、3本の射出装置を用いて多材成形品の成形を行うものが記載されているが3色の多材成形品であるかどうかや射出装置の大きさについての明示がない。また特許文献3の射出装置の配置は、1本の射出装置が固定盤の後方に配置されるものの、他の2本は型開閉方向と直交する両側に配置されるため、装置が幅方向にスペースを取られ、工場設置のレイアウトが行いにくいという問題があった。 For this reason, the multi-material injection molding machines of Patent Document 1 and Patent Document 4 have an advantage that the apparatus can be accommodated in the vertical direction, and the layout of the factory installation is easy to perform. And the injection molding machine of the multi-material molded product of the type of patent document 1 and patent document 4 is prevailing. On the other hand, there is no description in any document that molding of three different materials using an injection device for multi-material molded products. Slightly Patent Document 3 describes that a multi-material molded product is molded using three injection devices. However, whether or not it is a three-color multi-material molded product and the size of the injection device are described. There is no explicit statement. The arrangement of the injection device in Patent Document 3 is that one injection device is arranged behind the fixed platen, but the other two are arranged on both sides orthogonal to the mold opening / closing direction, so the devices are arranged in the width direction. There was a problem that space was taken up and it was difficult to lay out the factory.
また縦方向に型締が行われ、ロータリテーブル上に複数の金型が配置されるものであって、型締方向の周囲に3本の射出装置が配置されたものとしては、特許文献5に記載されたものが知られている。しかしながら特許文献5は、平面上に複数のキャビティが並ぶ配置であってそれらのキャビティが同時に型締されるために、型開閉方向に複数のキャビティが重なるように配置される特許文献1ないし特許文献4に示されたタイプのほうが同じ成形品を成形する際の型締力が小さくて済み、大面積の成形品の成形には向いている。 Further, Patent Citation 5 discloses that a mold is clamped in the vertical direction and a plurality of molds are arranged on a rotary table, and three injection devices are arranged around the mold clamping direction. What has been described is known. However, Patent Document 5 is an arrangement in which a plurality of cavities are arranged on a plane and the cavities are simultaneously clamped, so that the plurality of cavities overlap in the mold opening and closing direction. The type shown in FIG. 4 requires a smaller clamping force when molding the same molded product, and is suitable for molding a molded product having a large area.
上記のように特許文献1ないし特許文献4のタイプの多材成形品の射出成形機は、同じ成形品を成形する場合の型締力が小さくて済むが従来は2色成形が中心であり、少なくとも3色以上の成形については行われているかどうか判明せず、また特に少なくとも3色以上の成形を行う際の効率的な射出装置のレイアウトも考えられてこなかった。とりわけ最もレイアウト上の有効性が高い特許文献1および特許文献4のタイプの多材成形品の射出成形機において、少なくとも3色以上の多材成形品の成形を行うことは、考えられていなかった。そこで本発明では第1の金型が取付け可能な第1の盤と第2の金型が取付け可能な第2の盤との間に、型開閉方向と直交する方向の軸を中心に回転され中間金型が取付け可能な回転盤が設けられた多材成形品の射出成形機において、比較的スペースを取らずに少なくとも3材以上の多材成形を可能とした多材成形品の射出成形機を提供することを目的とする。 As described above, the injection molding machine for multi-material molded products of the types of Patent Document 1 to Patent Document 4 requires only a small clamping force when molding the same molded product, but conventionally, two-color molding is mainly used. It has not been clarified whether or not molding of at least three colors is performed, and an efficient layout of an injection apparatus has not been considered particularly when molding of at least three colors is performed. In particular, in the injection molding machine of the multi-material molded products of the types of Patent Document 1 and Patent Document 4 having the highest layout effectiveness, it has not been considered to mold multi-material molded products of at least three colors or more. . Therefore, in the present invention, the first board on which the first mold can be attached and the second board on which the second mold can be attached are rotated around an axis perpendicular to the mold opening / closing direction. A multi-material injection molding machine provided with a turntable to which an intermediate mold can be attached, and a multi-material injection molding machine capable of molding at least three or more multi-materials without taking up relatively space. The purpose is to provide.
また上記に関連して、第1の金型が取付け可能な第1の盤と第2の金型が取付け可能な第2の盤との間に、型開閉方向と直交する方向の軸を中心に回転され中間金型が取付け可能な回転盤が設けられた多材成形品の射出成形機において、少なくとも3色以上の成形を行う際に、金型内部の中子などの可動部を無くするか少なくして、構造が複雑でない金型を使用して多材成形品の成形が可能な多材成形品の成形方法を提供することを目的とする。更にまた上記の多材成形品の射出成形機を用いて、中子のある金型のようなバリが形成されることがない多材成形品を提供することを目的とする。 Further, in relation to the above, an axis in a direction orthogonal to the mold opening / closing direction is centered between the first board to which the first mold can be attached and the second board to which the second mold can be attached. In a multi-material injection molding machine provided with a turntable on which an intermediate mold can be mounted, when moving at least three colors or more, movable parts such as cores inside the mold are eliminated. An object of the present invention is to provide a method for forming a multi-material molded product, which can be formed into a multi-material molded product using a mold having a less complicated structure. It is another object of the present invention to provide a multi-material molded product in which burrs such as a mold having a core are not formed using the above-described multi-material molded product injection molding machine.
本発明の請求項1に記載の射出成形機は、第1の金型が取付け可能な第1の盤と第2の金型が取付け可能な第2の盤との間に、型開閉方向と直交する方向の軸を中心に回転され中間金型が取付け可能な回転盤が設けら、第1の盤の外側に第1の射出装置が設けられ、第2の盤の外側に第2の射出装置が設けられた多材成形品の射出成形機において、第1の射出装置よりも総重量の小さい第3の射出装置が設けられたことを特徴とする。 According to a first aspect of the present invention, there is provided an injection molding machine comprising: a mold opening / closing direction between a first board on which a first mold can be attached and a second board on which a second mold can be attached. A rotating disk that is rotated around an axis in the orthogonal direction and on which an intermediate mold can be attached is provided, a first injection device is provided outside the first board, and a second injection is provided outside the second board. The multi-material molded product injection molding machine provided with the apparatus is characterized in that a third injection apparatus having a total weight smaller than that of the first injection apparatus is provided.
本発明の請求項2に記載の射出成形機は、請求項1に記載の多材成形品の射出成形機において、第1の射出装置、第2の射出装置、および第3の射出装置は、それぞれベッドの上に直接、またはベッドの上方に設けられたことを特徴とする。 The injection molding machine according to claim 2 of the present invention is the multi-material injection molding machine according to claim 1, wherein the first injection device, the second injection device, and the third injection device are: Each is provided directly on the bed or above the bed.
本発明の請求項3に記載の射出成形機は、請求項または請求項2に記載の多材成形品の射出成形機において、第1の盤、第2の盤、中間盤に直接、または第2の盤や中間盤が移動する領域の上方の部材に、下方に向けて第3の射出装置が取付けられたことを特徴とする。 An injection molding machine according to a third aspect of the present invention is the injection molding machine for a multi-material molded product according to the second or second aspect, wherein the first molding machine, the second board, the intermediate board or the first molding machine. A third injection device is attached downward to a member above the region where the second and intermediate plates move.
本発明の請求項4に記載の射出成形機は、請求項1ないし請求項3のいずれか1項に記載の多材成形品の射出成形機において、回転盤に対して取付けられる2個の中間金型は、キャビティ形状が異なっていることを特徴とする。 According to a fourth aspect of the present invention, there is provided an injection molding machine according to any one of the first to third aspects, wherein two intermediate members mounted on a turntable are provided. The molds are characterized by different cavity shapes.
本発明の請求項5に記載の射出成形方法は、請求項4に記載の多材成形品の射出成形機を用い、第1の金型と一方の中間金型の間に形成された第1のキャビティに対して第1の射出装置から第1の材料を射出して1次成形品を成形し、1次成形品を保持した一方の中間金型を型開して反転させた後に再度型閉し、前記1次成形品を保持した中間金型と第2の金型の間に形成された第2のキャビティに対して第2の射出装置から第2の材料を射出して2次成形品を成形し、前記2次成形品を第2の金型に保持した状態で、型開後に他方の中間金型を反転させた後に再度型閉し、他方の中間金型と第2の金型の間に形成された第3のキャビティに対して第3の射出装置から第3の材料を射出して、多材成形品を成形することを特徴とする。 The injection molding method according to claim 5 of the present invention is the first molding formed between the first mold and one intermediate mold using the multi-material injection molding machine according to claim 4. The first material is injected from the first injection device into the cavity of the first mold to form a primary molded product, and one of the intermediate molds holding the primary molded product is opened and inverted, and then re-molded. The second material is injected from the second injection device into the second cavity formed between the intermediate mold and the second mold, which are closed and holding the primary molded product, and is subjected to secondary molding. In the state where the product is molded and the secondary molded product is held in the second mold, the other intermediate mold is inverted after the mold is opened, and then the mold is closed again, and the other intermediate mold and the second mold are closed. A third material is injected from a third injection device into a third cavity formed between the molds to form a multi-material molded product.
本発明の多材成形品の射出成形機は、第1の金型が取付け可能な第1の盤と第2の金型が取付け可能な第2の盤との間に、型開閉方向と直交する方向の軸を中心に回転され中間金型が取付け可能な回転盤が設けら、第1の盤の外側に第1の射出装置が設けられ、第2の盤の外側に第2の射出装置が設けられた多材成形品の射出成形機において、第1の射出装置よりも総重量の小さい第3の射出装置が設けられているので、3材からなる多材成形品を効率的に成形できる。 The multi-material injection molding machine of the present invention is orthogonal to the mold opening / closing direction between a first plate on which a first mold can be attached and a second plate on which a second mold can be attached. A rotating plate that is rotated about an axis in the direction to which the intermediate mold can be attached is provided, a first injection device is provided outside the first plate, and a second injection device is provided outside the second plate. In a multi-material injection molding machine provided with a third injection device having a total weight smaller than that of the first injection device, a multi-material molded product consisting of three materials can be efficiently molded. it can.
本発明の実施形態の射出成形機11について、図1および図2を参照して説明する。射出成形機11は、複数の樹脂材料を接合して多材成形品を成形する機能を有する射出成形機であって、ベッド12の上には型締装置13と第1の射出装置14、第2の射出装置15が設けられ、ベッド12の上方には第3の射出装置16が設けられている。 An injection molding machine 11 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The injection molding machine 11 is an injection molding machine having a function of joining a plurality of resin materials to form a multi-material molded product. On the bed 12, a mold clamping device 13, a first injection device 14, and a first Two injection devices 15 are provided, and a third injection device 16 is provided above the bed 12.
型締装置13は、ベッド12に固定された第1の盤である固定盤17に第1の金型である固定金型18が取付けられ、第2の盤である可動盤19に可動金型20が取付けられている。固定盤17の四隅近傍には型締シリンダ21がそれぞれ設けられ、そのロッドがタイバ22として可動盤19の四隅近傍にも挿通されている。またタイバ22の外周には図示しない係止部が設けられ、可動盤19の外側壁面のタイバ22が挿通される部分の近傍にはハーフナット23が設けられている。そして可動盤19は型開閉機構24によりベッド12上をタイバ22にガイドされて型開閉方向に移動可能となっている。 In the mold clamping device 13, a fixed mold 18 as a first mold is attached to a fixed plate 17 as a first board fixed to the bed 12, and a movable mold is attached to a movable plate 19 as a second board. 20 is attached. Clamping cylinders 21 are provided in the vicinity of the four corners of the fixed platen 17, and the rods are also inserted as tie bars 22 in the vicinity of the four corners of the movable platen 19. Further, a locking portion (not shown) is provided on the outer periphery of the tie bar 22, and a half nut 23 is provided in the vicinity of a portion where the tie bar 22 is inserted on the outer wall surface of the movable platen 19. The movable platen 19 is guided by the tie bar 22 on the bed 12 by the mold opening / closing mechanism 24 and can move in the mold opening / closing direction.
また固定盤17と可動盤19の間には、型開閉方向に直交する方向の軸(一般的には垂直方向の軸)を中心に回転される回転盤25が設けられている。本実施形態では固定盤17と可動盤19の間にベッド12上のガイドとタイバ22にガイドされて型開閉方向に移動される中間盤26が設けられ、前記中間盤26に対して回転軸や図示しないベアリングを介して回転盤25が回転自在(または180°反転自在)に設けられている。また中間盤26には回転盤25を回転駆動させるモータ30が取付けられている。そして回転盤25の両面にはそれぞれ中間金型27が取付けられる。しかし回転盤25については、タイバ22に挿通される中間盤26が設けられず、ベッド12上に回転盤25が回転可能に設けられたものでもよい。また回転盤25と中間金型27が一体になったものでもよい。いずれのタイプにしても回転盤25は、固定盤17に対して移動機構28により型開閉方向に移動可能となっている。図2においては判りやすいように、型開閉機構24、移動機構28は、それぞれ1個しか記載されていないが、1個に限定されず2個または4個でもよい。 Further, between the fixed platen 17 and the movable platen 19, there is provided a rotary plate 25 that is rotated around an axis (generally a vertical axis) in a direction orthogonal to the mold opening / closing direction. In this embodiment, a guide on the bed 12 and an intermediate plate 26 guided by the tie bar 22 and moved in the mold opening / closing direction are provided between the fixed platen 17 and the movable platen 19. A turntable 25 is provided rotatably (or 180 ° reversible) via a bearing (not shown). In addition, a motor 30 for rotating the rotary disc 25 is attached to the intermediate disc 26. Intermediate molds 27 are attached to both surfaces of the rotating disk 25, respectively. However, the rotating disk 25 may be provided such that the rotating disk 25 is rotatably provided on the bed 12 without providing the intermediate disk 26 inserted through the tie bar 22. Alternatively, the rotating disk 25 and the intermediate mold 27 may be integrated. In any type, the rotating plate 25 can be moved in the mold opening / closing direction by the moving mechanism 28 with respect to the fixed platen 17. For ease of understanding in FIG. 2, only one mold opening / closing mechanism 24 and one movement mechanism 28 are shown, but the number is not limited to one and may be two or four.
なお型締装置13の機構は、上記に限定されず、可動盤側に型締シリンダが設けられたものでもよく、可動盤を移動させる型開閉機構も、固定盤と可動盤の間の他、ベッドと可動盤の間、中間盤と可動盤の間などに設けられたものでもよい。また中間盤の移動機構も、固定盤と中間盤の間のほか、可動盤と中間盤の間に設けたものでもよい。更に別の型締装置としては、中間盤がベッド上に固定的に設けられ、中間盤には中間金型が取付けられる回転盤が回転可能に設けられていて、その両側に第1の金型が取付けられる第1の盤と第2の金型が取付けられる第2の盤がそれぞれ中央に向けて移動可能に設けられたものでもよい。 The mechanism of the mold clamping device 13 is not limited to the above, and a mold clamping cylinder may be provided on the movable platen side. The mold opening / closing mechanism for moving the movable platen is not only between the fixed platen and the movable platen, It may be provided between the bed and the movable board or between the intermediate board and the movable board. The intermediate plate moving mechanism may also be provided between the movable platen and the intermediate plate, as well as between the fixed platen and the intermediate plate. As another mold clamping device, an intermediate plate is fixedly provided on the bed, and a rotary plate to which the intermediate die is attached is rotatably provided on the intermediate plate, and the first die is provided on both sides thereof. The first board to which the second mold is attached and the second board to which the second mold is attached may be provided so as to be movable toward the center.
射出装置14,15,16は、ベッド12上に直接、またはベッド12の上方に設けられている。それぞれの射出装置14,15,16は駆動装置、スクリュを内蔵した加熱筒、加熱筒前部に固定されたノズルを有する一般的なものである。固定盤17の外側(回転盤25とは反対側)のベッド12上には長手方向(ノズルの向き)が型開閉方向と一致して第1の射出装置14が設けられている。第1の射出装置14は、一般的な射出成形機と同様に、固定金型18に対して進退移動はするが、型開閉時の可動盤19の動作に同期して移動しない。従って通常は一番大きい射出装置13が設けられる。例えば窓と窓枠からなる多材成形品を成形する場合であれば透明な窓部分を成形する透明樹脂の射出に用いられる。また可動盤19の外側のベッド12の上方の可動盤19と共に移動する台上には、長手方向(ノズルの向き)が型開閉方向と一致して第2の射出装置15が設けられている。換言すれば第1の射出装置14と第2の射出装置15は向かい合うように設けられている。第2の射出装置15は、可動盤19の型開閉移動とともに同期して移動するので第1の射出装置13と同じ大きさでもよいが第1の射出装置13よりも小さいことが多い。 The injection devices 14, 15, and 16 are provided directly on the bed 12 or above the bed 12. Each of the injection devices 14, 15, 16 is a general one having a driving device, a heating cylinder containing a screw, and a nozzle fixed to the front portion of the heating cylinder. A first injection device 14 is provided on the bed 12 outside the fixed platen 17 (opposite to the rotary plate 25) such that the longitudinal direction (nozzle direction) coincides with the mold opening / closing direction. Like the general injection molding machine, the first injection device 14 moves forward and backward with respect to the fixed mold 18, but does not move in synchronization with the operation of the movable platen 19 when the mold is opened and closed. Therefore, the largest injection device 13 is usually provided. For example, in the case of molding a multi-material molded product comprising a window and a window frame, it is used for injection of a transparent resin for molding a transparent window portion. A second injection device 15 is provided on the platform that moves together with the movable platen 19 above the bed 12 outside the movable platen 19 so that the longitudinal direction (nozzle direction) coincides with the mold opening / closing direction. In other words, the first injection device 14 and the second injection device 15 are provided to face each other. Since the second injection device 15 moves synchronously with the mold opening / closing movement of the movable platen 19, the second injection device 15 may be the same size as the first injection device 13, but is often smaller than the first injection device 13.
また本実施形態では、型締装置13の上側の2本のタイバ22を跨ぐように門型のフレーム29が設けられている。そしてフレーム29には上方から下方に向けて第3の射出装置16が設けられている。従って第3の射出装置16はベッド12および型締装置13の上方に設けられている。本実施形態では第3の射出装置16は、型開閉方向と直交する方向に長手方向(ノズルの向き)が向けて設けられている。そして第3の射出装置16は、垂直方向に移動可能であり、回転盤25を含む中間盤26と可動盤19がそれぞれ型締移動された際に可動金型20の樹脂注入孔にノズル孔が当接可能となっている。なお当接される部分は、固定金型18や中間金型27であってもよく、固定盤17、回転盤25、可動盤18であってもよい。また第3の射出装置16の取付方向は、鉛直方向に対して斜め方向に向けて取付けてもよい。なお本実施形態では、第3の射出装置16は、第2の射出装置15よりも総重量および最大射出量が小さい。しかし第3の射出装置16は、少なくとも第1の射出装置14よりも総重量および最大射出量が小さな射出装置となっている。なお射出装置の最大射出量は、スクリュ径とスクリュの最大前進ストロークの積によりほぼ決定される。また射出装置の総重量は射出装置自体が独立して移動される部分の重量であり、ホッパ部分は含むが供給管は含まれない。 In the present embodiment, a portal frame 29 is provided so as to straddle the two upper tie bars 22 of the mold clamping device 13. The frame 29 is provided with a third injection device 16 from above to below. Therefore, the third injection device 16 is provided above the bed 12 and the mold clamping device 13. In the present embodiment, the third injection device 16 is provided with its longitudinal direction (nozzle direction) directed in a direction orthogonal to the mold opening / closing direction. The third injection device 16 is movable in the vertical direction. When the intermediate plate 26 including the rotating plate 25 and the movable platen 19 are respectively clamped and moved, nozzle holes are formed in the resin injection holes of the movable die 20. Contact is possible. Note that the abutted portion may be the fixed mold 18 or the intermediate mold 27, or may be the fixed platen 17, the rotary plate 25, or the movable platen 18. Further, the third injection device 16 may be attached in an oblique direction with respect to the vertical direction. In the present embodiment, the third injection device 16 is smaller in total weight and maximum injection amount than the second injection device 15. However, the third injection device 16 is an injection device having a smaller total weight and maximum injection amount than at least the first injection device 14. The maximum injection amount of the injection device is substantially determined by the product of the screw diameter and the maximum forward stroke of the screw. The total weight of the injection device is the weight of the portion where the injection device itself is moved independently, including the hopper portion but not the supply pipe.
そして第3の射出装置16は、第1の射出装置14と第2の射出装置15だけが設けられた多材成形品の射出成形機11に容易に追加工事をすることができる。また第3の射出装置16を縦方向に設ける場合は、図1等のように第2の盤が移動する領域の上方の部材に取付けてもよく、固定盤17や中間盤26や可動盤19に対して取付け部材により直接取付けるようにしてもよい。ベッド12上でない位置に取付けると工場レイアウト上で不利になる場合もあるがそういった問題が無ければ、図3に示されるように平面視して型開閉方向に直交する方向に第3の射出装置16aを設けてもよい。第3の射出装置16aの方向は、型開閉方向に直交する方向に限定されず、斜め方向に設けてもよいことは無論のことである。この場合も第3の射出装置16aは、第1の射出装置14よりも総重量が小さいものであるので、ベッド12外に必要となるスペースも小さくて済む。 The third injection device 16 can easily perform additional work on the multi-material injection molding machine 11 provided with only the first injection device 14 and the second injection device 15. When the third injection device 16 is provided in the vertical direction, it may be attached to a member above the area where the second plate moves as shown in FIG. 1 or the like, and the fixed plate 17, intermediate plate 26, or movable plate 19 may be attached. Alternatively, it may be directly attached to the attachment member. If it is not located on the bed 12, it may be disadvantageous in the factory layout, but if there is no such problem, as shown in FIG. 3, the third injection device 16a in a direction perpendicular to the mold opening / closing direction as seen in plan view. May be provided. Of course, the direction of the third injection device 16a is not limited to the direction orthogonal to the mold opening / closing direction, and may be provided in an oblique direction. Also in this case, since the third injection device 16a has a smaller total weight than the first injection device 14, the space required outside the bed 12 can be reduced.
また次の図4の例は、固定盤17の外側の第1の射出装置14と平行に第3の射出装置16bが設けられたものである。また図示はしないが同様に可動盤19側の第2の射出装置15と平行に第3の射出装置16bを設けてもよい。このように第3の射出装置16bを配置すると、ベース12上でコンパクトに射出装置14,15,16bが配置できる上に、作業員が第3の射出装置16も含めて射出装置14,15,16bのメンテナンスを容易に行うことができる。図4の場合、第1の射出装置14と第3の射出装置16bの関係は平行に設けられているが、第1の射出装置14の軸線(ノズルの向き)と、第3の射出装置16bの軸線(ノズルの向き)が30°以内の範囲であればそれでもよい。ただし図4の例では射出装置16bを2本設けた側の固定盤17または可動盤19のノズルを挿入する部分の孔を大きくする必要がある。なお上記の図1ないし図4の例では第3の射出装置16、16a,16bしか説明をしなかったが、同様に第4の射出装置や第5の射出装置など更に多くの射出装置を設けることも考えられる。 In the example of FIG. 4, a third injection device 16 b is provided in parallel with the first injection device 14 outside the fixed platen 17. Although not shown, a third injection device 16b may be provided in parallel with the second injection device 15 on the movable platen 19 side. When the third injection device 16b is arranged in this way, the injection devices 14, 15, 16b can be arranged in a compact manner on the base 12, and the operator can also include the third injection device 16, including the third injection device 16. Maintenance of 16b can be easily performed. In the case of FIG. 4, the relationship between the first injection device 14 and the third injection device 16b is provided in parallel, but the axis of the first injection device 14 (nozzle direction) and the third injection device 16b. As long as the axis of the nozzle (the direction of the nozzle) is within a range of 30 °, it may be used. However, in the example of FIG. 4, it is necessary to enlarge the hole in the portion where the nozzle of the fixed platen 17 or the movable platen 19 on the side where two injection devices 16 b are provided. Although only the third injection devices 16, 16a, and 16b have been described in the examples of FIGS. 1 to 4, the number of injection devices such as the fourth injection device and the fifth injection device is similarly provided. It is also possible.
次に本発明の多材成形品の成形方法について説明する。まず第1の成形方法について、模式的に記載された図5、図6を中心にして図1等の符号も援用しながら説明する。まず多材成形品の射出成形機11の固定盤17に取付けられた固定金型18に対して、回転盤25に取付けられた一方の中間金型27を型閉して1次キャビティを形成する。この際に回転盤25に取付けられた他方の中間金型27に対して可動盤19に取付けられた可動金型20が型閉じされる。そして型締装置13の型締シリンダ21により型締した状態で、固定金型18と一方の中間金型27の間の1次キャビティ31に第1の射出装置16から第1の樹脂材料を射出して1次成形品Aを成形する。そして可動盤19を移動させる型開閉機構24と回転盤25を移動させる移動機構28を駆動して、固定金型18と一方の中間金型27、他方の中間金型27と可動金型20の間をそれぞれ型開する。この際に1次成形品Aは一方の中間金型27の面に張り付いた状態で型開される。 Next, a method for molding a multi-material molded product of the present invention will be described. First, the first forming method will be described with reference to FIG. 1 and the like with reference to FIG. 5 and FIG. 6 which are schematically described. First, with respect to the stationary mold 18 attached to the stationary platen 17 of the multi-material injection molding machine 11, one intermediate die 27 attached to the rotary plate 25 is closed to form a primary cavity. . At this time, the movable mold 20 attached to the movable board 19 is closed with respect to the other intermediate mold 27 attached to the rotating board 25. The first resin material is injected from the first injection device 16 into the primary cavity 31 between the fixed mold 18 and one intermediate mold 27 in a state where the mold is clamped by the mold clamping cylinder 21 of the mold clamping device 13. Thus, the primary molded product A is molded. Then, the mold opening / closing mechanism 24 for moving the movable platen 19 and the moving mechanism 28 for moving the rotary platen 25 are driven so that the fixed die 18 and one intermediate die 27, the other intermediate die 27 and the movable die 20 are moved. Each mold is opened. At this time, the primary molded product A is opened in a state where it is stuck to the surface of one intermediate mold 27.
次にモータ30を駆動させて回転盤25を180°反転させ、1次成形品Aが張り付いた一方の中間金型27を可動金型20と正対させる。そして再度、前記型開閉機構24と前記移動機構28を駆動して固定金型18と他方の中間金型27、一方の中間金型27と可動金型20を型閉する。その際に1次成形品Aが張り付いた一方の中間金型27と可動金型20の間には、2次成形品を成形可能な2次キャビティ32と、3次成形品を成形可能な3次キャビティ33が形成される。そして図6に示されるように、2次キャビティ32には可動盤19の反対側に設けた第2の射出装置15から第2の樹脂材料が射出される。また3次キャビティ33には上方に設けられた第3の射出装置16から第3の樹脂材料が射出される。これらの第2の射出装置15からの2次射出と第3の射出装置16からの3次射出は通常は時間をずらせて行われるが、同時でもよい。また型閉された後の2次射出時には3次キャビティ33は形成されておらず、2次射出後に成形中間金型27の中子か可動金型20の中子を移動させて3次キャビティ33を形成し、第3の樹脂材料を射出するものでもよい。いずれにしても第1の成形方法では、型締状態の間に第2の射出装置15と第3の射出装置16から2次成形と3次成形が行われる。またその際に、同時か時間をずらせて、固定金型18と他方の中間金型27の間では次の1次成形品Aの成形が行われる。従って一方の中間金型27と他方の中間金型27の形状は同じである。 Next, the motor 30 is driven to invert the turntable 25 by 180 ° so that one intermediate mold 27 to which the primary molded product A is attached is opposed to the movable mold 20. Then, the mold opening / closing mechanism 24 and the moving mechanism 28 are driven again to close the stationary mold 18 and the other intermediate mold 27, and the one intermediate mold 27 and the movable mold 20. At that time, a secondary cavity 32 capable of molding a secondary molded product and a tertiary molded product can be molded between the intermediate mold 27 and the movable mold 20 to which the primary molded product A is stuck. A tertiary cavity 33 is formed. Then, as shown in FIG. 6, the second resin material is injected into the secondary cavity 32 from the second injection device 15 provided on the opposite side of the movable platen 19. A third resin material is injected into the tertiary cavity 33 from a third injection device 16 provided above. The secondary injection from the second injection device 15 and the tertiary injection from the third injection device 16 are usually performed while shifting the time, but they may be performed simultaneously. In addition, the tertiary cavity 33 is not formed at the time of the secondary injection after the mold is closed, and the secondary cavity 33 is moved by moving the core of the molding intermediate mold 27 or the core of the movable mold 20 after the secondary injection. And a third resin material may be injected. In any case, in the first molding method, secondary molding and tertiary molding are performed from the second injection device 15 and the third injection device 16 during the mold clamping state. At the same time, the next primary molded product A is molded between the fixed mold 18 and the other intermediate mold 27 at the same time or at different times. Therefore, the shape of one intermediate mold 27 and the other intermediate mold 27 is the same.
そして次に図示はしないが、一方の中間金型27と可動金型19の間が型開され、通常は一方の中間金型27に多材成形品B(完成品)が張り付いた状態で離型され、中間金型27の図示しないエジェクタにより突き出される。なお上記において、1次成形と2次成形を固定金型18(第1の金型)と中間金型27の間で行って、3次成形のみを中間金型27と可動金型20(第2の金型)の間で行ってもよい。または1次成形のみを可動金型20(第2の金型)と中間金型27の間で行って、2次成形と3次成形を固定金型18(第1の金型)と中間金型27の間で行うか、1次成形と2次成形を可動金型20(第2の金型)と中間金型27の間で行って、3次成形のみを固定金型18と中間金型27の間で行ってもよい。またバリエーションに応じて4次成形以降を行うものでもよい。 Then, although not shown in the figure, the space between the one intermediate mold 27 and the movable mold 19 is opened, and the multi-material molded product B (finished product) is usually stuck to the one intermediate mold 27. The mold is released and ejected by an ejector (not shown) of the intermediate mold 27. In the above, primary molding and secondary molding are performed between the fixed mold 18 (first mold) and the intermediate mold 27, and only the tertiary molding is performed between the intermediate mold 27 and the movable mold 20 (first mold). 2 molds). Alternatively, only primary molding is performed between the movable mold 20 (second mold) and the intermediate mold 27, and secondary molding and tertiary molding are performed with the fixed mold 18 (first mold) and the intermediate mold. It is performed between the molds 27, or primary molding and secondary molding are performed between the movable mold 20 (second mold) and the intermediate mold 27, and only tertiary molding is performed with the fixed mold 18 and the intermediate mold. It may be performed between the molds 27. Moreover, you may perform after 4th shaping | molding according to a variation.
これらの成形では1次成形は、キャビティの間隔を開いた状態で射出を行い、1次キャビティ31内の溶融樹脂材料を圧縮する射出圧縮成形で行ってもよく、射出時の溶融樹脂の圧力でキャビティを開いてから圧縮するものでもよい。また2次成形や3次成形を圧縮成形としてもよい。また圧縮成形を行う際は、4個の型締シリンダ21を別個に制御して金型間の間隔を平行制御するようにしてもよい。また金型はコールドランナ、ホットランナに限定されず、金型を冷却のみならず、加熱および冷却するものでもよい。また成形に使用される材料は限定されないが、一例として1次成形は、ポリカーボネートやアクリルの透明材料とし、2次成形は有色樹脂やエラストマー材料とし、3次成形は射出成形による薄膜形成材や、コーティング材としてもよい。 In these moldings, the primary molding may be performed by injection compression molding in which the molten resin material in the primary cavity 31 is compressed by injecting with the gaps being spaced apart. You may compress after opening a cavity. Further, secondary molding or tertiary molding may be compression molding. When performing compression molding, the four mold clamping cylinders 21 may be controlled separately to control the distance between the molds in parallel. The mold is not limited to a cold runner or a hot runner, and may be one that heats and cools the mold as well as cools the mold. The material used for the molding is not limited, but as an example, the primary molding is a transparent material such as polycarbonate or acrylic, the secondary molding is a colored resin or an elastomer material, the tertiary molding is a thin film forming material by injection molding, It is good also as a coating material.
次に本発明の多材成形品の第2の成形方法について模式的に記載された図7ないし図10を中心にして図1等の符号も援用しながら説明する。第2の成形方法に使用される固定盤17に対して取付けられる2個の中間金型34,35は、キャビティ面の形状が異なっていることが特徴である。まず固定盤17に取付けられた固定金型18に対して、回転盤25に取付けられた一方の中間金型34を型閉して1次キャビティ36を形成する。この際回転盤25に取付けられた他方の中間金型35に対して可動盤19に取付けられた可動金型20が型閉じされる。そして図7に示されるように、型締装置13の型締シリンダ21により型締された状態で、固定金型18と一方の中間金型34の間の1次キャビティ36に第1の射出装置14から第1の樹脂材料を射出して1次成形品Bを成形する。そして可動盤19を移動させる型開閉機構24と回転盤25を移動させる移動機構28を駆動して、固定金型18と一方の中間金型34、他方の中間金型35と可動金型20の間を型開する。この際に1次成形品Cは一方の中間金型34の面に張り付いた状態で型開される。 Next, the second molding method of the multi-material molded product of the present invention will be described with reference to FIG. 1 and the like, with reference to FIGS. The two intermediate molds 34 and 35 attached to the stationary platen 17 used in the second molding method are characterized in that the shapes of the cavity surfaces are different. First, with respect to the fixed mold 18 attached to the fixed platen 17, one intermediate mold 34 attached to the rotating plate 25 is closed to form a primary cavity 36. At this time, the movable mold 20 attached to the movable board 19 is closed with respect to the other intermediate mold 35 attached to the rotating board 25. Then, as shown in FIG. 7, the first injection device is inserted into the primary cavity 36 between the fixed die 18 and one intermediate die 34 while being clamped by the clamping cylinder 21 of the clamping device 13. The first resin material is injected from 14 to form a primary molded product B. Then, the mold opening / closing mechanism 24 for moving the movable platen 19 and the moving mechanism 28 for moving the rotary plate 25 are driven, so that the fixed die 18 and one intermediate die 34, the other intermediate die 35 and the movable die 20 are moved. Open the space. At this time, the primary molded product C is opened in a state where it is stuck to the surface of one intermediate mold 34.
次にモータ30を駆動させて回転盤25を180°反転させ、1次成形品Cが張り付いた一方の中間金型34を可動金型20と正対させる。そして再度、前記型開閉機構24と前記移動機構28を駆動して固定金型18と他方の中間金型35、一方の中間金型34と可動金型20を型閉する。その際に1次成形品Bが張り付いた一方の中間金型34と可動金型20の間には、2次成形品を成形可能な2次キャビティ37が形成される。そして図8に示されるように、2次キャビティ37には可動盤19の反対側に設けた第2の射出装置15から第2の樹脂材料が射出される。本実施形態ではこの状態で3次成形は行われず、固定金型18と他方の中間金型35の間でも次の1次成形は行われない。 Next, the motor 30 is driven to invert the turntable 25 by 180 °, and the one intermediate mold 34 to which the primary molded product C is attached is opposed to the movable mold 20. Then, the mold opening / closing mechanism 24 and the moving mechanism 28 are driven again to close the fixed mold 18 and the other intermediate mold 35, and the one intermediate mold 34 and the movable mold 20. At this time, a secondary cavity 37 capable of molding the secondary molded product is formed between the intermediate mold 34 to which the primary molded product B is stuck and the movable mold 20. As shown in FIG. 8, the second resin material is injected into the secondary cavity 37 from the second injection device 15 provided on the opposite side of the movable platen 19. In this embodiment, the tertiary molding is not performed in this state, and the next primary molding is not performed between the fixed mold 18 and the other intermediate mold 35.
そして2次成形の冷却が完了すると、再度、固定金型18と他方の中間金型35、一方の中間金型34と可動金型20を型開する。この際に2次成形までが完了した中間成形品Dは可動金型20側に張り付いて離型されるようにする。次に2個の形状の異なる一方の中間金型34と他方の中間金型35を180°反転する。そして図9に示されるように再度、固定金型18と一方の中間金型34、他方の中間金型35と可動金型20を型閉する。そうすることにより、他方の中間金型35と可動金型20との間には2次成形が完了した中間成形品Dの他に、3次キャビティ38が形成される。そして図9に示されるように、前記3次キャビティ38に対して、第3の射出装置16から第3の樹脂材料が射出される。この際に固定金型18と一方の中間金型34の間の1次キャビティ36では次の1次成形品Cの成形がなされる。 When the cooling of the secondary molding is completed, the stationary mold 18 and the other intermediate mold 35, and the one intermediate mold 34 and the movable mold 20 are opened again. At this time, the intermediate molded product D that has been subjected to the secondary molding is attached to the movable mold 20 side and released. Next, two intermediate molds 34 having different shapes and the other intermediate mold 35 are inverted by 180 °. Then, as shown in FIG. 9, the fixed mold 18 and one intermediate mold 34, and the other intermediate mold 35 and the movable mold 20 are closed again. By doing so, a tertiary cavity 38 is formed between the other intermediate mold 35 and the movable mold 20 in addition to the intermediate molded product D in which the secondary molding has been completed. Then, as shown in FIG. 9, the third resin material is injected from the third injection device 16 into the tertiary cavity 38. At this time, the next primary molded product C is molded in the primary cavity 36 between the fixed mold 18 and one intermediate mold 34.
そして次に図10に示されるように、他方の中間金型35と可動金型20の間を型開し、成形の完了した多材成形品Eの取出しを行う。この際、多材成形品Eは一方の中間金型34側に張り付いて離型され突き出されるものでも、可動金型20に張り付いて離型され突き出されるものでもよい。この成形方法を行うことにより、上記の図5、図6のものと比較して、生産性の点では劣るが、金型構造を簡単なものとすることができる。特に図5、図6において中子を移動させるものとの対比では、中子を移動させる場合は中子とそれ以外のキャビティ面の間にバリができるが、第2の成形方法の場合にはそうったバリの心配がない。また1次成形品Cに対して2次成形と3次成形を両側の面に付着させることも可能となる。そしてまた3次キャビティ38を1次キャビティ36の形状に近いかまたは一致しているような大面積とすることもでき、そこに第3の射出装置16から多層となるように樹脂材料を射出することができる。 Then, as shown in FIG. 10, the other intermediate mold 35 and the movable mold 20 are opened, and the multi-material molded product E that has been molded is taken out. At this time, the multi-material molded product E may be stuck to one intermediate mold 34 and released and protruded, or may be attached to the movable mold 20 and released and protruded. By performing this molding method, the mold structure can be simplified, although the productivity is inferior to that of the above-described FIGS. In particular, in contrast to the case where the core is moved in FIGS. 5 and 6, when the core is moved, burrs are formed between the core and the other cavity surface, but in the case of the second molding method, There is no worry about Bali. Further, it is possible to attach the secondary molding and the tertiary molding to the both sides of the primary molded product C. The third cavity 38 can also have a large area that is close to or coincides with the shape of the primary cavity 36, and the resin material is injected into the multilayer from the third injection device 16 there. be able to.
または第3の射出装置16は、液体(粘性体を含む)を噴出させる塗装装置やコーティング装置であってもよく、その場合は2色の樹脂の組み合わせの多材成形品に塗装やコーティングを行うことができる。 Alternatively, the third injection device 16 may be a coating device or a coating device that ejects a liquid (including a viscous material). In that case, the third injection device 16 performs coating or coating on a multi-material molded product of a combination of two colors of resins. be able to.
またこれらの図6ないし図10の別の成形方法にも、中央に設けた回転盤は移動せずに、両側の第1の金型と第2の金型が中央に向けて型開閉移動するタイプの射出成形機を用いることができるのは言うまでもない。また圧縮成形などを用いることができることも言うまでもない。なお本発明については、一々列挙はしないが、上記したものに限定されず、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。 6 to 10 also, the first and second molds on both sides move open and close toward the center without moving the rotating disk provided in the center. It goes without saying that a type of injection molding machine can be used. Needless to say, compression molding can be used. The present invention is not enumerated one by one, but is not limited to the one described above, and it goes without saying that the present invention is also applied to those modified by a person skilled in the art based on the gist of the present invention.
11 射出成形機
12 ベッド
13 型締装置
14 第1の射出装置
15 第2の射出装置
16,16a,16b 第3の射出装置
17 固定盤
18 固定金型(第1の金型)
19 可動盤
20 可動金型(第2の金型)
25 回転盤
26 中間盤
27,34,35 中間金型
A,C 1次成形品
B,E 多材成形品
D 中間成形品
DESCRIPTION OF SYMBOLS 11 Injection molding machine 12 Bed 13 Clamping apparatus 14 1st injection apparatus 15 2nd injection apparatus 16, 16a, 16b 3rd injection apparatus 17 Fixed platen 18 Fixed mold (1st mold)
19 Movable platen 20 Movable mold (second mold)
25 Rotary plate 26 Intermediate plate 27, 34, 35 Intermediate mold A, C Primary molded product B, E Multi-material molded product D Intermediate molded product
Claims (5)
第1の射出装置よりも総重量の小さい第3の射出装置が設けられたことを特徴とする多材成形品の射出成形機。 The intermediate mold is rotated about an axis perpendicular to the mold opening / closing direction between the first board to which the first mold can be attached and the second board to which the second mold can be attached. In a multi-material injection molding machine provided with a mountable turntable, a first injection device provided outside the first plate, and a second injection device provided outside the second plate ,
An injection molding machine for multi-material molded products, wherein a third injection device having a total weight smaller than that of the first injection device is provided.
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CN104526980A (en) * | 2014-12-23 | 2015-04-22 | 深圳创维精密科技有限公司 | Three-colour injection mould |
JP2015150753A (en) * | 2014-02-13 | 2015-08-24 | 有限会社ベストテクニカル | Injection molder |
KR20160115772A (en) | 2015-03-25 | 2016-10-06 | 가부시키가이샤 메이키 세이사쿠쇼 | Injection molding machine for composite moldings |
KR20180089131A (en) * | 2017-01-31 | 2018-08-08 | 엘에스엠트론 주식회사 | Injection Molding Machine |
JP2019006109A (en) * | 2017-06-22 | 2019-01-17 | キヤノン株式会社 | Manufacturing method of mold and component and manufacturing method of image formation apparatus |
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JP2015150753A (en) * | 2014-02-13 | 2015-08-24 | 有限会社ベストテクニカル | Injection molder |
CN104526980A (en) * | 2014-12-23 | 2015-04-22 | 深圳创维精密科技有限公司 | Three-colour injection mould |
KR20160115772A (en) | 2015-03-25 | 2016-10-06 | 가부시키가이샤 메이키 세이사쿠쇼 | Injection molding machine for composite moldings |
JP2016179637A (en) * | 2015-03-25 | 2016-10-13 | 株式会社名機製作所 | Injection molder for molding composite molded product |
KR20180089131A (en) * | 2017-01-31 | 2018-08-08 | 엘에스엠트론 주식회사 | Injection Molding Machine |
KR102597580B1 (en) | 2017-01-31 | 2023-11-01 | 엘에스엠트론 주식회사 | Injection Molding Machine |
JP2019006109A (en) * | 2017-06-22 | 2019-01-17 | キヤノン株式会社 | Manufacturing method of mold and component and manufacturing method of image formation apparatus |
CN110757721A (en) * | 2018-07-28 | 2020-02-07 | 泰瑞机器股份有限公司 | Injection molding method of multicolor product |
CN110757721B (en) * | 2018-07-28 | 2022-04-15 | 泰瑞机器股份有限公司 | Injection molding method of multicolor product |
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