JP2001079883A - Injection molding in-mold decorating apparatus - Google Patents
Injection molding in-mold decorating apparatusInfo
- Publication number
- JP2001079883A JP2001079883A JP25666199A JP25666199A JP2001079883A JP 2001079883 A JP2001079883 A JP 2001079883A JP 25666199 A JP25666199 A JP 25666199A JP 25666199 A JP25666199 A JP 25666199A JP 2001079883 A JP2001079883 A JP 2001079883A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- vacuum suction
- mold
- female mold
- injection molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、射出成形と同時に
型内で図柄や文字等が施された絵付シートを射出樹脂成
形体の表面に一体的に接着積層して加飾積層製品を得る
ための射出成形同時絵付装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for obtaining a decorative laminated product by integrally bonding and laminating a painted sheet on which patterns and characters are applied in a mold simultaneously with injection molding on the surface of an injection resin molded article. And a simultaneous painting apparatus for injection molding.
【0002】[0002]
【従来の技術】射出成形と同時に射出樹脂成形体の表面
に絵付シートを一体的に接着する射出成形同時絵付方法
としては、従来より幾つもの態様が提案されているが、
それらの大半は、次の(a)〜(i)の工程の全部又は
幾つかを記述順に又はその順番を入れ換えて、順次、又
は複数の工程を同時に重複してもしくは並列的に行うよ
うにされている(特公昭50−19132号、実公平3
−56344号、特公平7−41637号公報等を参
照)。2. Description of the Related Art Several methods have been proposed for simultaneous injection molding and painting methods in which a painting sheet is integrally adhered to the surface of an injection resin molded article simultaneously with injection molding.
Most of them are arranged so that all or some of the following steps (a) to (i) are performed in the stated order or permuted, and the steps are sequentially performed or a plurality of steps are simultaneously performed in parallel or in parallel. (Japanese Patent Publication No. 50-19132, Jitsuhei 3
-56344, JP-B-7-41637, etc.).
【0003】(a)絵付シートを射出成形に用いられる
雌型のパーティング面上に供給するシート供給工程。 (b)絵付シートを雌型のパーティング面に固定保持す
るクランプ工程。 (c)絵付シートを熱盤等により加熱軟化させる加熱軟
化工程。 (d)絵付シートを真空吸引及び/又は圧空供給等によ
り雌型のキャビティに沿 わせるように延伸させる延伸工程(予備成形工程)。 (e)雌型と雄型の一方(通常は雌型)を他方(通常は
雄型)側へ移動させて型締めを行う型締め工程。(A) A sheet supply step of supplying a picture sheet onto a female parting surface used for injection molding. (B) a clamping step of fixing and holding the painted sheet on the female parting surface; (C) A heating softening step of heating and softening the painted sheet with a hot platen or the like. (D) a stretching step (preliminary molding step) of stretching the painted sheet along the cavity of the female mold by vacuum suction and / or air supply. (E) A mold clamping step of moving one of the female mold and the male mold (usually a female mold) to the other (usually a male mold) to clamp the mold.
【0004】(f)雌型と雄型との間に形成されるキャ
ビティ内に雄型側から流動状態の樹脂(熔融樹脂)を注
入充填して射出成形を行う射出成形工程。 (g)雌型と雄型とを離間させる型開き工程。 (h)絵付シートのうちの射出樹脂成形体に接着付随さ
せるべき部分を他の部分(余剰部分)から切り離すシー
トトリミング工程。 (i)絵付シートが接着積層された積層成形品を雄雌両
成形型から取り出す取出工程。(F) An injection molding step of injecting and filling a resin (molten resin) in a flowing state from the male mold into a cavity formed between the female mold and the male mold to perform injection molding. (G) A mold opening step of separating the female mold and the male mold. (H) A sheet trimming step of separating a portion of the painted sheet to be attached to the injection resin molded body from another portion (excess portion). (I) A take-out step of taking out the laminated molded product on which the painted sheet is adhesively laminated from both the male and female molds.
【0005】なお、複数の工程を同時に重複して行うと
は、複数の工程が一工程に含まれることをいい、例え
ば、前記(e)の型締め工程において絵付シートを雌型
と雄型との間に挟んで固定保持するようになせば、該型
締め工程と同時に重複して前記(b)のクランプ工程が
行われたことになり、また、前記(f)の射出成形工程
において絵付シートを射出された熔融樹脂の熱と圧力に
より延伸させるようになせば、該射出成形工程と同時に
重複して前記(d)の延伸工程が行われたことになる場
合をいう。[0005] Simultaneously performing a plurality of steps simultaneously means that a plurality of steps are included in one step. For example, in the mold clamping step (e), the painted sheet is divided into a female type and a male type. If it is not fixed and held between them, the clamping step (b) is performed simultaneously with the mold clamping step, and the painted sheet is used in the injection molding step (f). If the stretching is performed by the heat and pressure of the injected molten resin, this means that the stretching step (d) is performed simultaneously with the injection molding step.
【0006】また、絵付シートとしては、製品種別に応
じて貼合わせ積層シート(ラミネートシート)と転写シ
ートのいずれかが用いられ、ラミネートシートである場
合には、射出成形によりそのままで絵付けが行われたこ
とになり、射出樹脂成形体の表面にシート全層が接着一
体化して化粧層となる。それに対し、絵付シートが転写
シートである場合には、射出樹脂成形体の表面に一体化
した絵付シートのうちの支持体シートを剥離し、装飾層
等の転写層のみを射出樹脂成形体側に残留させて化粧層
となすことにより絵付けが完了する。[0006] As the painting sheet, either a laminated sheet (laminated sheet) or a transfer sheet is used depending on the product type. In the case of a laminated sheet, painting is performed as it is by injection molding. That is, all the layers of the sheet are bonded and integrated with the surface of the injection resin molded body to form a decorative layer. On the other hand, when the painting sheet is a transfer sheet, the support sheet of the painting sheet integrated with the surface of the injection resin molded body is peeled off, and only the transfer layer such as the decoration layer remains on the injection resin molding body side. Then, the painting is completed by forming a decorative layer.
【0007】[0007]
【発明が解決しようとする課題】ところで、前記した如
くの射出成形同時絵付方法により得るべき加飾積層製品
には、例えば、図7に示される如くに、絵付シートSを
外周から中央部内周にまで回り込ませる必要のある窓部
(開口部)W等を設ける場合がある。前記窓部W等を設
けるにあたっては、通常、図6に示される如くに、雌型
キャビティ13の底部に、前記窓部W等に対応した凸状
孤立部12aを突設しておき、前記延伸工程において、
前記雌型キャビティ13に開口する真空吸引孔等を通じ
て絵付シートを真空吸引し、それによって、前記キャビ
ティ13全体、すなわち、前記凸状孤立部12aの外周
面にも絵付シートSを沿わせて密着させ、以後、前記し
た如くの射出成形工程等を行うようにされる。By the way, as shown in FIG. 7, for example, as shown in FIG. 7, a decorative laminated product to be obtained by the simultaneous injection molding simultaneous painting method is provided with a painted sheet S extending from the outer periphery to the inner periphery of the central portion. There is a case where a window (opening) W or the like that needs to be turned to the right is provided. In providing the window portion W and the like, usually, as shown in FIG. 6, a convex isolated portion 12a corresponding to the window portion W and the like is protruded from the bottom of the female mold cavity 13, and In the process,
The painted sheet is vacuum-suctioned through a vacuum suction hole or the like opened in the female mold cavity 13, whereby the painted sheet S is brought into close contact with the entire cavity 13, that is, the outer peripheral surface of the convex isolated portion 12 a. Thereafter, the injection molding process and the like as described above are performed.
【0008】しかしながら、従来においては、上記のよ
うに雌型キャビティ13に凸状孤立部12aを突設して
窓部W等を形成した場合には、図6に示される如くに、
絵付シートSを真空吸引によって雌型キャビティ13
(凸状孤立部12aを含む)に沿わせる延伸工程におい
て、前記凸状孤立部12aにおける外周角部(ここでは
4箇所)の根元付近にしわGが発生することが多い。こ
のように、凸状孤立部12aにおける外周角部の根元付
近にしわGが発生すると、図7に示される如くに、得ら
れた加飾積層製品Pの窓部Wの4隅付近にしわGが残
り、製品の品質を大きく低下させることになる。However, conventionally, in the case where the window W or the like is formed by projecting the convex isolated portion 12a in the female cavity 13 as described above, as shown in FIG.
The painted sheet S is vacuum-sucked into the female cavity 13.
In the stretching step along the (including the convex isolated portion 12a), a wrinkle G often occurs near the root of the outer peripheral corner (here, four locations) in the convex isolated portion 12a. As described above, when the wrinkles G are generated near the root of the outer peripheral corner in the convex isolated portion 12a, as shown in FIG. 7, the wrinkles G are generated near the four corners of the window W of the obtained decorative laminate product P. And the quality of the product is greatly reduced.
【0009】前記のようなしわGの発生は、延伸工程に
おいて、絵付シートSがしわ発生部位より先にその両側
の部位に吸引密着せしめられたことに起因していると考
えられる。かかるしわGの発生を抑えるための一つの方
策として、絵付シートの加熱条件を調節すること、例え
ば、しわGが発生しやすい部位の加熱温度を他の部位よ
り高く設定すること等が考えられるが、絵付シートの加
熱温度を精密に調節することは極めて難しく、安定的な
改善は見込めない。The generation of the wrinkles G as described above is considered to be caused by the drawing sheet S being brought into close contact with the portions on both sides thereof before the wrinkled portions in the stretching step. As one measure for suppressing the generation of such wrinkles G, it is conceivable to adjust the heating conditions of the painted sheet, for example, to set the heating temperature of a part where wrinkles G are likely to occur to be higher than other parts. It is extremely difficult to precisely control the heating temperature of the painted sheet, and stable improvement cannot be expected.
【0010】本発明は、上述した如くの従来の問題を解
消すべくなされたもので、その目的とするところは、絵
付シートの延伸工程において、凸状孤立部の外周角部に
しわが発生しないようにでき、もって、窓部等にしわが
生じていない高品質の加飾積層製品を得ることのできる
射出成形同時絵付装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to prevent wrinkles from being generated at the outer peripheral corners of a convex isolated portion in a drawing process of a painted sheet. Accordingly, an object of the present invention is to provide an injection molding simultaneous painting apparatus capable of obtaining a high-quality decorative laminated product having no wrinkles in a window or the like.
【0011】[0011]
【課題を解決するための手段】上述の目的を達成すべ
く、本発明に係る射出成形同時絵付装置は、基本的に
は、雌型及び雄型と、絵付シートを前記雌型のパーティ
ング面に押圧して固定保持するクランプ手段と、前記絵
付シートを前記雌型のキャビティに沿うように延伸させ
る真空吸引手段と、前記雌型と雄型との間に形成された
キャビティ内に前記雄型側から流動状態の樹脂を注入充
填する樹脂射出手段と、を備え、前記雌型には、得るべ
き加飾積層製品の窓部等を形成するための、キャビティ
底部から突出する凸状孤立部が設けられており、前記真
空吸引手段による前記絵付シートの吸引を、前記凸状孤
立部の外周角部から優先的に行うようにされていること
を特徴としている。In order to achieve the above-mentioned object, an injection molding simultaneous painting apparatus according to the present invention basically comprises a female mold and a male mold, and a painting sheet, which is formed of a parting surface of the female mold. Clamp means for pressing and holding the painted sheet, vacuum suction means for extending the painted sheet along the cavity of the female mold, and the male mold in a cavity formed between the female mold and the male mold. Resin injection means for injecting and filling a resin in a fluid state from the side, and the female mold has a convex isolated portion projecting from the cavity bottom for forming a window or the like of a decorative laminated product to be obtained. It is characterized in that a suction of the painting sheet by the vacuum suction means is preferentially performed from an outer peripheral corner of the convex isolated portion.
【0012】本発明装置の好ましい具体的な態様では、
前記凸状孤立部における外周角部の根元付近に真空吸引
用の溝ないし孔が設けられる。また、他の好ましい態様
では、前記凸状孤立部が入れ子型とされ、この凸状孤立
部と雌型本体部との間に真空吸引用の隙間が形成され
る。この場合、より好ましい態様では、前記凸状孤立部
における外周角部の根元付近及び/又はこれに対向する
前記雌型本体部の対向部位に、前記真空吸引用の隙間よ
り広い真空吸引用の溝ないし孔が設けられる。In a preferred specific embodiment of the device of the present invention,
A groove or hole for vacuum suction is provided near the root of the outer peripheral corner in the convex isolated portion. In another preferred aspect, the convex isolated portion is nested, and a gap for vacuum suction is formed between the convex isolated portion and the female mold body. In this case, in a more preferred aspect, a groove for vacuum suction wider than the gap for vacuum suction is provided in the vicinity of the root of the outer peripheral corner of the convex isolated portion and / or at the opposing portion of the female mold main body opposed thereto. Or holes are provided.
【0013】上記の如くの構成とされた本発明に係る射
出成形同時絵付装置の好ましい態様においては、凸状孤
立部における外周角部の根元付近に真空吸引用の溝ない
し孔が設けられて、真空吸引手段による絵付シートの吸
引を、前記凸状孤立部の外周角部から優先的に行うよう
にされている。言い換えれば、絵付シートの延伸工程に
おいて、絵付シートは、まず最初に、しわの発生しやす
い凸状孤立部における外周角部の根元付近に、そこに設
けられた真空吸引用の溝ないし孔を通じて吸引されて、
そこに沿うように密着せしめられ、しかる後、その両側
周辺部に沿うように吸引密着せしめられる。In a preferred embodiment of the simultaneous injection-molding and painting apparatus according to the present invention having the above-described configuration, a groove or a hole for vacuum suction is provided near a root of an outer peripheral corner of the convex isolated portion, The painting sheet is sucked by the vacuum suction means preferentially from the outer peripheral corner of the convex isolated portion. In other words, in the step of stretching the painted sheet, the painted sheet is first suctioned through the groove or hole for vacuum suction provided near the root of the outer peripheral corner in the protruding isolated portion where wrinkles easily occur. Being
It is made to adhere along there, and after that, it is made to adhere by suction along the peripheral portions on both sides thereof.
【0014】このように、絵付シートの吸引を凸状孤立
部の外周角部から優先的に行うようにしたことにより、
絵付シートの延伸工程において、凸状孤立部の外周角部
にしわが発生しないようにでき、その結果、窓部等にし
わが生じていない高品質の加飾積層製品を得ることがで
きる。As described above, the suction of the painting sheet is performed preferentially from the outer peripheral corner of the convex isolated portion.
In the step of stretching the painted sheet, it is possible to prevent wrinkles from being generated at the outer peripheral corners of the convex isolated portions, and as a result, it is possible to obtain a high-quality decorative laminated product having no wrinkles in the windows and the like.
【0015】また、しわの発生を気にする必要がなくな
ったので、絵付シート加熱条件の制約が低減され、加熱
条件を柄伸び等の他の不具合の対応に当てることが可能
となった。本発明の射出成形同時絵付装置において、雄
雌両成形型は、鉄等の金属あるいはセラミックス等で作
製され、それらに必要に応じて、真空吸引や圧空供給用
に小孔(真空吸引孔等)を設ける。Further, since it is not necessary to worry about the occurrence of wrinkles, restrictions on the heating conditions of the sheet with a picture are reduced, and the heating conditions can be applied to other problems such as pattern elongation. In the simultaneous injection molding painting apparatus of the present invention, the male and female molds are made of metal such as iron or ceramics, and small holes (vacuum suction holes, etc.) for vacuum suction or compressed air supply as necessary. Is provided.
【0016】また、雌型を複数の分割部分の集合体で構
成(いわゆる入れ子構造に)し、隣合う分割部分間にス
リット状の隙間を形成してこの隙間を真空吸引孔として
用いて真空吸引を行うようにしてもよい。本発明装置で
は、好ましくは、前記のように、凸状孤立部を入れ子型
として、それと雌型本体部との間に真空吸引用の隙間を
形成し、さらに好ましくは、前記凸状孤立部における外
周角部の根元付近及び/又はこれに対向する前記雌型本
体部の対向部位に、前記真空吸引用の隙間より広い真空
吸引用の溝ないし孔を設け、これによって、絵付シート
の吸引を凸状孤立部の外周角部から優先的に行うように
なす。Further, the female mold is composed of an aggregate of a plurality of divided parts (in a so-called nested structure), and a slit-like gap is formed between adjacent divided parts, and this gap is used as a vacuum suction hole for vacuum suction. May be performed. In the device of the present invention, preferably, as described above, the convex isolated portion is nested, and a gap for vacuum suction is formed between the convex isolated portion and the female mold main body. A vacuum suction groove or hole wider than the vacuum suction gap is provided in the vicinity of the root of the outer peripheral corner and / or at the opposing portion of the female mold main body opposed thereto. This is performed preferentially from the outer peripheral corner of the shape-isolated portion.
【0017】前記雄型には、流動状態の樹脂を射出する
ためのランナーとゲートを設ける。ランナー、ゲートの
本数、位置、形状等は、得るべき製品の形状等を勘案し
て自由に設定することができる。The male mold is provided with a runner and a gate for injecting a resin in a flowing state. The number, position, shape, and the like of runners and gates can be freely set in consideration of the shape of the product to be obtained.
【0018】また、本発明装置においては、通常、ロー
ル状に巻き取られた長尺帯状の絵付シート(シートロー
ル)を先端側から1ショット分ずつ順次巻き出し、この
巻き出された絵付シートの先端側1ショット分を前記雌
型のパーティング面上に搬送するシート供給手段が備え
られる。このシート供給手段としては、その搬送方式に
より二つに大別できる。その一つは、例えば、特開昭6
0−212314号公報や実公平1−10185号公報
等にも見られるように、ロール状に巻き取られた長尺帯
状の絵付シートの1ショット分を雌型上流から巻出機で
巻き出すとともに、雌型下流にて巻取機で巻き取る巻き
出し巻き取り方式(ロール/ロール方式)をとるもので
あり、他の一つは、例えば特開平6−315950号等
にも見られるように、巻出機、搬送チャック、受取固定
チャックを有し、前記巻出機から巻き出される長尺帯状
の絵付シートの先端部付近を前記搬送チャックで把持し
てその1ショット分を前記雌型のパーティング面上に供
給するとともに、シート先端部を受取固定チャックに受
け取らせて把持固定し、かかる状態で、クランプ手段に
より絵付シートを雌型パーティング面上に押圧して固定
保持し、しかる後、絵付シートをクランプ手段より上流
側で幅方向に切断して枚葉シートとなす搬送チャック方
式をとるものである。In the apparatus of the present invention, usually, a long strip-shaped picture sheet (sheet roll) wound up in a roll shape is sequentially unwound one shot at a time from the tip end side, and the unrolled picture sheet is rolled. Sheet supply means for conveying one shot on the leading end side onto the female parting surface is provided. The sheet supply means can be roughly classified into two types depending on the transport system. One of them is described in, for example,
As can be seen in Japanese Patent Application Publication No. 0-212314 and Japanese Utility Model Publication No. 1-110185, one shot of a long strip-shaped painting sheet wound in a roll shape is unwound from a female upstream by an unwinder. And a take-up winding system (roll / roll system) in which a winding machine winds down the female mold. The other one is, for example, as disclosed in JP-A-6-315950. An unwinding machine, a transport chuck, and a receiving fixed chuck, wherein the transport chuck is used to grip the vicinity of the leading end of a long strip-shaped painted sheet unwound from the unwinding machine, and one shot thereof is taken out of the female mold party. The sheet is supplied onto the printing surface, and the leading end of the sheet is received and fixed by a receiving and fixing chuck. In this state, the painted sheet is pressed onto the female parting surface by the clamping means and fixed and held. The decorative sheet is intended to take a cut in the width direction single sheet and form conveying chuck system upstream of the clamp means.
【0019】さらに、絵付シートを雌型パーティング面
に押圧固定すべくクランプ手段を付設する。クランプ手
段としては、枠状ないし井桁状の押さえ板等を用いるこ
とができ、その駆動は、型締め動作等の成形用駆動力を
用いたり、イジェクターピン駆動機構の動力を利用した
りすることができる他、別途に流体圧アクチュエーター
等の駆動手段を設けることによりなされる。Further, a clamping means is provided for pressing and fixing the painting sheet to the female parting surface. As the clamping means, a frame-shaped or double-girder-shaped holding plate or the like can be used, and the driving thereof can be performed by using a molding driving force such as a mold clamping operation or by using the power of an ejector pin driving mechanism. In addition to this, it is possible to provide a separate driving means such as a fluid pressure actuator.
【0020】絵付シートは、基材シートとその上に積層
された装飾層からなり、基材シートを成形品と密着一体
化させたまま最終製品として使用する貼り合わせ積層シ
ート(ラミネートシート)、あるいは一旦絵付シートと
成形品とを一体化させた後、装飾層(転写層)のみを成
形品側に残して基材シート(支持体シート)を剥離する
転写シートのいずれも使用することができる。The painted sheet is composed of a base sheet and a decorative layer laminated thereon, and is a laminated sheet (laminated sheet) used as a final product while the base sheet is tightly integrated with a molded product, or Once the painted sheet and the molded article are integrated, any transfer sheet that peels off the substrate sheet (support sheet) while leaving only the decorative layer (transfer layer) on the molded article side can be used.
【0021】前記貼合わせ積層シートの場合、基材シー
トとしては、ポリエチレン、ポリプロピレン等のポリオ
レフィン樹脂、ポリ塩化ビニル、アクリル樹脂、ポリス
チレン、ABS樹脂、ポリカーボネート樹脂、ポリエス
テル樹脂等の熱可塑性樹脂を用いることができる。基材
シートの厚さは、通常20〜500μm程度である。装
飾層としては、印刷絵柄、着色又は透明塗装、金属薄
膜、あるいは、硬質塗膜、防曇塗料、導電性層等の機能
性層等を用いることができる。In the case of the laminated sheet, a thermoplastic resin such as polyolefin resin such as polyethylene and polypropylene, polyvinyl chloride, acrylic resin, polystyrene, ABS resin, polycarbonate resin and polyester resin is used as the base sheet. Can be. The thickness of the base sheet is usually about 20 to 500 μm. As the decorative layer, a printed pattern, colored or transparent coating, a metal thin film, or a functional layer such as a hard coating film, an antifogging paint, or a conductive layer can be used.
【0022】前記転写シートの場合は、一旦剥離性の支
持体シート上に形成した絵柄層等よりなる転写層を、別
の被転写体に転移させるためのもので、支持体シート上
には必要に応じて離型層を設けても良く、転写層として
は、剥離層、装飾層、接着剤層、等からなり、装飾層以
外の層は必要に応じて選択する。装飾層としては、絵柄
層、金属薄膜層(部分又は全面)あるいは硬質塗膜、防
曇塗膜、導電性層等の機能性層から選ばれる。In the case of the transfer sheet, it is for transferring a transfer layer composed of a pattern layer or the like once formed on a releasable support sheet to another transfer target. A release layer may be provided according to the conditions, and the transfer layer includes a release layer, a decorative layer, an adhesive layer, and the like, and layers other than the decorative layer are selected as necessary. The decorative layer is selected from a pattern layer, a metal thin film layer (part or entire surface) or a functional layer such as a hard coating film, an anti-fog coating film, or a conductive layer.
【0023】支持体シートは、ナイロン6、ナイロン6
6等のポリアミド樹脂、ポリエチレン、ポリプロピレン
等のポリオレフィン樹脂、ポリ塩化ビニル等、可撓性を
有する熱可塑性樹脂フィルムあるいはそれらの積層体が
好ましい。The support sheet is made of nylon 6, nylon 6
A flexible thermoplastic resin film such as a polyamide resin such as No. 6 or the like, a polyolefin resin such as polyethylene or polypropylene, polyvinyl chloride or the like, or a laminate thereof is preferable.
【0024】射出成形用の樹脂としては、ABS(アク
リロニトリル・ブタジエン・スチレン共重合体)樹脂、
ポリスチレン、ポリ塩化ビニル、アクリル樹脂、ポリカ
ーボネート樹脂等の熱可塑性樹脂を加熱熔融して液状な
いし流動状態となったもの、あるいは、二液硬化型、触
媒硬化型の樹脂、例えば、ウレタン樹脂、ポリエステル
樹脂等の未硬化液等の射出成形同時絵付用として従来よ
り知られている材料を使用でき、製品の要求物性やコス
ト等に応じて選定される。As the resin for injection molding, ABS (acrylonitrile-butadiene-styrene copolymer) resin,
Thermoplastic resins such as polystyrene, polyvinyl chloride, acrylic resin, and polycarbonate resin that have been heated and melted to be in a liquid or fluid state, or two-pack curable and catalyst-curable resins such as urethane resins and polyester resins For example, an uncured liquid, such as uncured liquid, can be made of a material that is conventionally known for simultaneous painting with injection molding, and is selected according to the required physical properties of the product, cost, and the like.
【0025】[0025]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態を詳細に説明する。図1、図2は、本発明に係
る射出成形同時絵付装置の一実施形態を示している。本
実施形態の射出成形同時絵付装置10により得るべき加
飾積層製品は、前述した図7に示される如くの、窓部W
を有する縦断面外形がコ字状の比較的深絞り形状の角形
のトレー形パネルであり、射出樹脂成形体Pr(図2)
の表面(窓部Wを含む)に、例えば木目模様の装飾層を
有する絵付シートS(ラミネートシート)を接着積層し
たものである。Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of a simultaneous painting apparatus for injection molding according to the present invention. The decorative laminated product to be obtained by the simultaneous injection molding and painting apparatus 10 of the present embodiment is a window W as shown in FIG.
Is a relatively deep drawn rectangular tray-shaped panel having a U-shaped vertical cross-section and having an injection resin molded body Pr (FIG. 2).
(Including the window portion W), a painting sheet S (laminate sheet) having, for example, a wood-grained decorative layer is bonded and laminated.
【0026】本実施形態の射出成形同時絵付装置10に
おいては、前記積層製品に対応した凹凸形状の雌型12
と雄型30とを備え、雌型12は、その底部(図の左端
側)が図示していない可動盤に固定されていて、流体圧
シリンダのラムにより水平方向(図1のX方向)、言い
換えれば、雄型30に対して接近離隔する方向に進退動
するようされている。In the simultaneous injection molding painting apparatus 10 of the present embodiment, the female mold 12 having an uneven shape corresponding to the laminated product is provided.
And a male mold 30. The female mold 12 has a bottom (left end side in the figure) fixed to a movable plate (not shown), and a ram of a hydraulic cylinder in a horizontal direction (X direction in FIG. 1). In other words, it moves forward and backward in a direction approaching and separating from the male mold 30.
【0027】なお、本実施形態では、上記のように雌型
12が可動型とされていて水平方向に移動するようにさ
れているが、これに限定される訳ではなく、例えば、雄
型、雌型を上下に対向配置してそれらの一方(この場合
でも、通常は雌型の方)を鉛直方向に移動させる等の形
態を採用することもできる。In the present embodiment, the female mold 12 is a movable mold and moves in the horizontal direction as described above. However, the present invention is not limited to this. It is also possible to adopt a form in which the female dies are vertically opposed to each other, and one of them (in this case, usually, the female dies) is moved in the vertical direction.
【0028】前記雌型12には、得るべき加飾積層製品
Pに対応したキャビティ13が設けられるとともに、前
記積層製品Pの窓部Wを形成するための、キャビティ1
3底部から突出する断面矩形の凸状孤立部12aが設け
られている。この凸状孤立部12aは、雌型本体部12
Aの略中央部に組み込まれた断面T字状の入れ子型12
Bの天辺部からなっている。The female mold 12 is provided with a cavity 13 corresponding to the decorative laminated product P to be obtained, and a cavity 1 for forming a window W of the laminated product P.
3, a protruding isolated portion 12a having a rectangular cross section protruding from the bottom. This convex isolated portion 12a is
A nested mold 12 having a T-shaped cross section incorporated in the approximate center of A
B consists of the top.
【0029】前記キャビティ13には、絵付シートSを
該キャビティ13に沿わせるように延伸させるべく、真
空吸引するための複数本の真空吸引孔15がコーナー部
付近に開口せしめられ、この真空吸引孔15、15、…
は、真空吸引通路18及び導管19を介して外部の真空
ポンプ等からなる真空源(図示せず)に接続されてい
る。In the cavity 13, a plurality of vacuum suction holes 15 for vacuum suction are opened in the vicinity of a corner so as to extend the painting sheet S along the cavity 13, and this vacuum suction hole is provided. 15, 15, ...
Is connected to a vacuum source (not shown) including an external vacuum pump and the like via a vacuum suction passage 18 and a conduit 19.
【0030】また、前記入れ子型12Bの縦辺部と前記
雌型本体部12Aとの間には、図3に拡大図示されてい
るように、前記真空吸引通路18に連通する環状の連通
路16が形成され、また、前記凸状孤立部12a(の下
面)と雌型本体部12A(のキャビティ13の底面)と
の間には、前記連通路16に連通するように、間隔維持
用のスペーサ(図示せず)等が挿入されている環状の真
空吸引用の隙間17が形成されている。An annular communication passage 16 communicating with the vacuum suction passage 18 is provided between the vertical side portion of the nesting mold 12B and the female main body 12A, as shown in an enlarged view in FIG. A spacer for maintaining an interval is provided between (the lower surface of) the convex isolated portion 12a (the lower surface of the cavity 13) and the female mold body portion 12A (the lower surface of the cavity 13). An annular gap 17 for vacuum suction into which (not shown) or the like is inserted is formed.
【0031】そして、さらに、前記凸状孤立部12aに
おける外周角部(4箇所)の根元付近(下面側)には、
図4及び図5(図4のV矢視部分拡大図)に示される如
くに、前記連通路16に連通する、前記真空吸引用の隙
間17より広い(厚みが大きな)真空吸引用の溝40が
穿設されている。該溝40は、凸状孤立部12aの外周
角部の丸み(アール)に沿う形状の弧状溝部41と該弧
状溝部41と前記連通路16とを結ぶ直線部42とから
なっている。Further, near the base (lower surface side) of the outer peripheral corners (four places) of the convex isolated portion 12a,
As shown in FIGS. 4 and 5 (enlarged view as viewed in the direction indicated by the arrow V in FIG. 4), a vacuum suction groove 40 (having a large thickness) wider than the vacuum suction gap 17 and communicating with the communication passage 16. Are drilled. The groove 40 is composed of an arcuate groove portion 41 having a shape along the roundness of the outer peripheral corner of the convex isolated portion 12a, and a straight line portion 42 connecting the arcuate groove portion 41 and the communication passage 16.
【0032】上記に加え、前記雌型12のパーティング
面14の外周側には、Oリング22が装着された環状の
装着溝23が設けられている。前記Oリング22は、後
述する矩形枠状ないし井桁状のクランパー20が、間に
絵付シートSを挟んで雌型12のパーティング面14に
押し付けられた際、前記キャビティ12と外部とを気密
的に遮断する役目を果たす。In addition to the above, an annular mounting groove 23 in which an O-ring 22 is mounted is provided on the outer peripheral side of the parting surface 14 of the female mold 12. The O-ring 22 hermetically seals the cavity 12 and the outside when a rectangular frame-shaped or cross-girder-shaped clamper 20, which will be described later, is pressed against the parting surface 14 of the female die 12 with the painting sheet S interposed therebetween. Acts as a barrier to
【0033】一方、前記雄型30は、射出成形機のノズ
ルが装着される固定盤に固定されており、この雄型30
には、前記積層製品形状に対応した凸状コア部31が設
けられるとともに、その内部には、熔融樹脂射出用の2
本のゲート33、33とそれに連なるランナー32が設
けられている。On the other hand, the male mold 30 is fixed to a fixed plate on which a nozzle of an injection molding machine is mounted.
Is provided with a convex core portion 31 corresponding to the shape of the laminated product, and has a 2
The gates 33 of the book and the runner 32 connected to the gates 33 are provided.
【0034】また、本装置10には、図示はされていな
いが、ロール状に巻き取られた長尺帯状の絵付シートを
先端側から1ショット分ずつ順次巻き出し、この巻き出
された絵付シートSの先端側1ショット分を前記雌型1
2のパーティング面14上に搬送するシート供給機構が
備えられている。このシート供給機構は、図示は略す
が、前記の巻き出し巻き取り方式、及び搬送チャック方
式のいずれを用いてもよい。Although not shown, the apparatus 10 sequentially unwinds a long strip-shaped picture sheet wound up in a roll form one shot at a time from the front end side. S for one shot on the tip side of the female mold 1
A sheet feeding mechanism for conveying the sheet onto the second parting surface 14 is provided. Although not shown, this sheet feeding mechanism may use any of the above-described unwinding and winding system and the transport chuck system.
【0035】さらに、前記雌型12には、供給された1
ショット分の絵付シートSを前記パーティング面14上
に押圧して固定保持すべく、矩形枠状ないし井桁状のク
ランパー20が設けられている。このクランパー20
は、その四隅に連結された4本の摺動ロッド(図示省
略)を介して図示されていない駆動手段により前記パー
ティング面14に対して垂直方向(図のX方向)に進退
動できるようになっている。Further, the female mold 12 is supplied with the supplied 1
A rectangular frame-shaped or double-girder-shaped clamper 20 is provided to press and hold the shot-painted sheet S on the parting surface 14. This clamper 20
Can be moved back and forth in a direction perpendicular to the parting surface 14 (X direction in the figure) by driving means (not shown) through four sliding rods (not shown) connected to the four corners. Has become.
【0036】また、予備成形を行うべく、絵付シートを
加熱軟化させるための、例えば非接触の赤外線加熱方式
の熱盤80を備える。熱盤80は、図示していない熱盤
駆動機構により、前記雌型12の一側の待機位置から前
記雌型12のパーティング面14上のシート加熱位置
(図1に示される位置)に移動せしめられるようになっ
ている。In order to perform preforming, a hot plate 80 of, for example, a non-contact infrared heating system for heating and softening the painted sheet is provided. The hot platen 80 is moved from a standby position on one side of the female mold 12 to a sheet heating position (the position shown in FIG. 1) on the parting surface 14 of the female mold 12 by a hot plate drive mechanism (not shown). I am being squeezed.
【0037】上記した如くの構成とされた射出成形同時
絵付装置10により、射出成形同時絵付けを行うにあた
っては、まず、シート供給機構により1ショット分の絵
付シートSを雌型パーティング面14上に供給し、続い
て、クランパー20をパーティング面14側に前進させ
て、絵付シートSをこのクランパー20によって前記パ
ーティング面14に押圧固定し、次いで、熱盤80を、
クランパー20により押圧固定されている絵付シートS
上のシート加熱位置まで移動させて、絵付シートSを、
その表面温度が例えば100°Cとなるまで加熱軟化さ
せる。In performing simultaneous injection molding painting by the injection molding simultaneous painting apparatus 10 having the above-described configuration, first, one shot of the painted sheet S is placed on the female parting surface 14 by the sheet supply mechanism. Then, the clamper 20 is advanced to the parting surface 14 side, and the painting sheet S is pressed and fixed to the parting surface 14 by the clamper 20, and then the hot platen 80 is
Pictured sheet S pressed and fixed by clamper 20
By moving to the upper sheet heating position,
Heat softening is performed until the surface temperature becomes, for example, 100 ° C.
【0038】続いて、前記真空吸引通路18、雌型キャ
ビティ13に開口する真空吸引孔15、前記入れ子型1
2Bの縦辺部と前記雌型本体部12Aとの間に設けられ
た連通路16、前記凸状孤立部12a(の下面)と雌型
本体部12A(のキャビティ13の底面)との間に形成
された真空吸引用の隙間17、前記凸状孤立部12aに
おける外周角部(4箇所)の根元付近(下面側)に設け
られた真空吸引用の溝40等で構成される真空吸引手段
による真空吸引を行って、前記絵付シートSを雌型キャ
ビティに沿って密着させるべく延伸させる(図1の延伸
工程)。Subsequently, the vacuum suction passage 18, the vacuum suction hole 15 opened in the female mold cavity 13, the nesting mold 1
A communication path 16 provided between the vertical side of 2B and the female mold body 12A, between the convex isolated portion 12a (the lower surface) and the female mold body 12A (the bottom surface of the cavity 13 thereof). Vacuum suction means formed by a vacuum suction groove 17 formed near the root (lower surface side) of the outer peripheral corners (four places) of the convex isolated portion 12a, and the like, is formed. Vacuum suction is performed to stretch the painted sheet S so as to closely adhere along the female mold cavity (a stretching step in FIG. 1).
【0039】ここで、上記延伸工程においては、前記凸
状孤立部12aにおける外周角部の根元付近に設けられ
た真空吸引用の溝40(図5参照)を通じて、絵付シー
トの吸引を、前記凸状孤立部12aの外周角部から優先
的に行うようにされている。言い換えれば、絵付シート
Sの延伸工程において、絵付シートSは、まず最初に、
しわの発生しやすい凸状孤立部12aにおける外周角部
の根元付近に、そこに設けられた真空吸引用の溝40を
通じて吸引されて、そこに沿うように密着せしめられ、
しかる後、前記真空吸引用の隙間17を通じてその両側
周辺部に沿うように吸引密着せしめられる。Here, in the above-mentioned stretching step, the suction of the painted sheet is performed through the vacuum suction groove 40 (see FIG. 5) provided near the root of the outer peripheral corner of the convex isolated portion 12a. This is performed preferentially from the outer corner of the shape-isolated portion 12a. In other words, in the drawing process of the painted sheet S, the painted sheet S
Around the base of the outer corner of the convex isolated portion 12a where wrinkles are likely to occur, it is sucked through the vacuum suction groove 40 provided therein and adhered along the same,
Thereafter, suction is applied through the vacuum suction gap 17 along the peripheral portions on both sides thereof.
【0040】このように、絵付シートSの吸引を凸状孤
立部12aの外周角部から優先的に行うようにしたこと
により、絵付シートSの延伸工程において、凸状孤立部
12aの外周角部にしわが発生しないようにでき、その
結果、窓部等にしわが生じていない高品質の加飾積層製
品を得ることができる。また、しわの発生を気にする必
要がなくなったので、絵付シート加熱条件の制約が低減
され、加熱条件を柄伸び等の他の不具合の対応に当てる
ことが可能となった。As described above, the drawing sheet S is sucked preferentially from the outer peripheral corner of the convex isolated portion 12a. Wrinkles can be prevented from occurring, and as a result, a high-quality decorative laminated product in which windows and the like have no wrinkles can be obtained. Further, since it is no longer necessary to worry about the occurrence of wrinkles, the restrictions on the heating conditions of the sheet with a picture are reduced, and the heating conditions can be applied to other problems such as pattern elongation.
【0041】なお、延伸工程後は、図2に示される如く
に、雌型12を雄型30側に前進させて、雄型30と雌
型12との型締めを行って、両成形型12、30間に成
形キャビティを形成し(型締め工程)、続いて、前記成
形キャビティ内に流動状態の樹脂Prを注入充填し、得
られる射出樹脂成形体と前記絵付シートSとを積層して
一体化させ(射出成形工程)、その後、前記射出樹脂成
形体が完全に固化した後、前記雌型12を元の位置まで
後退させて、雄雌両成形型12、30の型開きを行い
(形開き工程)、得られた積層成形品を当該雄雌両成形
型間から取り出し、その後、積層成形品における絵付シ
ートの余剰部分をトリミングするトリミング工程等を行
う。After the stretching step, as shown in FIG. 2, the female mold 12 is advanced to the male mold 30 side, and the male mold 30 and the female mold 12 are clamped. , 30 (mold clamping step), and subsequently, a resin Pr in a flowing state is injected and filled into the molding cavity, and the obtained injection resin molded body and the above-mentioned painted sheet S are laminated and integrated. (Injection molding step). After the injection resin molded body is completely solidified, the female mold 12 is retracted to the original position, and the male and female molds 12 and 30 are opened (mold). (Opening step), the obtained laminated molded product is taken out from between the male and female molds, and thereafter, a trimming step or the like of trimming an excess portion of the painted sheet in the laminated molded product is performed.
【0042】[0042]
【発明の効果】以上の説明から理解されるように、本発
明によれば、絵付シートの延伸工程において、凸状孤立
部の外周角部にしわが発生しないようにでき、その結
果、窓部等にしわが生じていない高品質の加飾積層製品
を得ることのできる射出成形同時絵付装置を提供でき
る。As will be understood from the above description, according to the present invention, it is possible to prevent wrinkles from being generated at the outer peripheral corners of the convex isolated portions in the step of stretching the painted sheet, and as a result, the windows and the like can be prevented. It is possible to provide an injection molding simultaneous painting apparatus capable of obtaining a high-quality decorative laminated product without wrinkles.
【図1】本発明に係る射出成形同時絵付装置の一実施形
態の全体構成(延伸工程)を示す縦断面図。FIG. 1 is a longitudinal sectional view showing the overall configuration (stretching step) of an embodiment of a simultaneous painting apparatus for injection molding according to the present invention.
【図2】図1に示される装置の射出成形工程を示す縦断
面図。FIG. 2 is a longitudinal sectional view showing an injection molding process of the apparatus shown in FIG.
【図3】図1に示される装置の凸状孤立部周辺を示す部
分拡大横断面図。FIG. 3 is a partially enlarged cross-sectional view showing the vicinity of a convex isolated portion of the device shown in FIG.
【図4】図1に示される装置の凸状孤立部を示す斜視
図。FIG. 4 is a perspective view showing a convex isolated portion of the device shown in FIG. 1;
【図5】図4のV矢視部分拡大図。FIG. 5 is a partially enlarged view as viewed in the direction of arrow V in FIG. 4;
【図6】絵付シートに発生するしわの説明に供される斜
視図。FIG. 6 is a perspective view used to explain wrinkles that occur in a painted sheet.
【図7】窓部にしわが発生した加飾積層製品の一例を示
す斜視図。FIG. 7 is a perspective view showing an example of a decorative laminated product in which a window has wrinkles.
S 絵付シート W 窓部 10 射出成形同時絵付装置 12 雌型 12a 凸状孤立部 12B 入れ子型 13 キャビティ 14 パーティング面 15 真空吸引孔 16 連通路 17 真空吸引用の隙間 20 クランパー 30 雄型 40 真空吸引用の溝 S Painting Sheet W Window 10 Simultaneous Injection Molding Painting Device 12 Female Die 12a Convexed Isolated Part 12B Nested Mold 13 Cavity 14 Parting Surface 15 Vacuum Suction Hole 16 Communication Path 17 Vacuum Suction Gap 20 Clamper 30 Male Die Vacuum Suction Groove for
Claims (4)
のパーティング面に押圧して固定保持するクランプ手段
と、前記絵付シートを前記雌型のキャビティに沿うよう
に延伸させる真空吸引手段と、前記雌型と雄型との間に
形成されたキャビティ内に前記雄型側から流動状態の樹
脂を注入充填する樹脂射出手段と、を備え、前記雌型に
は、得るべき加飾積層製品の窓部等を形成するための、
キャビティ底部から突出する凸状孤立部が設けられてお
り、前記真空吸引手段による前記絵付シートの吸引を、
前記凸状孤立部の外周角部から優先的に行うようにされ
ていることを特徴とする射出成形同時絵付装置。1. A female mold and a male mold, clamping means for pressing and holding a picture sheet against a parting surface of the female mold, and vacuum suction for extending the picture sheet along a cavity of the female mold. Means, and resin injection means for injecting and filling a resin in a flowing state from the male mold side into a cavity formed between the female mold and the male mold, and the female mold has a decoration to be obtained. For forming windows of laminated products, etc.
A convex isolated portion projecting from the bottom of the cavity is provided, and the suction of the painted sheet by the vacuum suction means is performed.
Injection molding simultaneous painting apparatus characterized by being preferentially performed from the outer peripheral corner of the convex isolated portion.
付近に真空吸引用の溝ないし孔が設けられていることを
特徴とする請求項1に記載の射出成形同時絵付装置。2. The simultaneous injection-molding and painting apparatus according to claim 1, wherein a groove or a hole for vacuum suction is provided near a root of an outer peripheral corner of the convex isolated portion.
凸状孤立部と雌型本体部との間に真空吸引用の隙間が形
成されていることを特徴とする請求項1又は2に記載の
射出成形同時絵付装置。3. The convex isolated portion is of a nested type, and a vacuum suction gap is formed between the convex isolated portion and the female mold body. Injection molding simultaneous painting apparatus according to 1.
付近及び/又はこれに対向する前記雌型本体部の対向部
位に、前記真空吸引用の隙間より広い真空吸引用の溝な
いし孔が設けられていることを特徴とする請求項3に記
載の射出成形同時絵付装置。4. A groove or hole for vacuum suction wider than the gap for vacuum suction is provided near the root of the outer peripheral corner portion of the convex isolated portion and / or at an opposing portion of the female main body portion opposed thereto. The simultaneous injection molding and painting apparatus according to claim 3, wherein the apparatus is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP25666199A JP4185221B2 (en) | 1999-09-10 | 1999-09-10 | Injection molding simultaneous painting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25666199A JP4185221B2 (en) | 1999-09-10 | 1999-09-10 | Injection molding simultaneous painting device |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001079883A true JP2001079883A (en) | 2001-03-27 |
JP4185221B2 JP4185221B2 (en) | 2008-11-26 |
Family
ID=17295724
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Application Number | Title | Priority Date | Filing Date |
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JP25666199A Expired - Fee Related JP4185221B2 (en) | 1999-09-10 | 1999-09-10 | Injection molding simultaneous painting device |
Country Status (1)
Country | Link |
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JP (1) | JP4185221B2 (en) |
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1999
- 1999-09-10 JP JP25666199A patent/JP4185221B2/en not_active Expired - Fee Related
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JP4185221B2 (en) | 2008-11-26 |
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