JPH0994846A - Method and apparatus for simultaneous injection molding and foil decorating - Google Patents
Method and apparatus for simultaneous injection molding and foil decoratingInfo
- Publication number
- JPH0994846A JPH0994846A JP25357495A JP25357495A JPH0994846A JP H0994846 A JPH0994846 A JP H0994846A JP 25357495 A JP25357495 A JP 25357495A JP 25357495 A JP25357495 A JP 25357495A JP H0994846 A JPH0994846 A JP H0994846A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- mold
- die
- female
- cavity
- 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.)
- Pending
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
成形品に絵付シートを一体的に接着して図柄や文字等が
施された成形品を得るようにした射出成形同時絵付方法
及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous injection-molding method and apparatus for simultaneously injection-molding a molded sheet to a molded product to obtain a molded product having a design, characters and the like. .
【0002】[0002]
【従来の技術】射出成形と同時に成形品の表面に絵付シ
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、特公昭50−19132号公報等に見られる
如く、帯状シート又は枚葉シートからなる絵付シートを
雌型(通常は可動型)のキャビティ面に対向させて熱盤
等により加熱軟化させた後、真空成形及び/又は圧空成
形により雌型のキャビティ面に沿わせて密着させ、しか
る後、雌型と雄型との型閉めを行って前記雌型内に前記
雄型側から流動状態の樹脂を注入充填して射出成形を行
いようにしたものが一般的である。2. Description of the Related Art As a simultaneous injection molding painting method for integrally adhering a painting sheet to the surface of a molded article at the same time as injection molding, conventionally, as shown in Japanese Patent Publication No. 50-19132, a strip-shaped sheet or a sheet is used. The pictured sheet consisting of a sheet is made to face the cavity surface of the female mold (usually a movable mold) and is heated and softened by a heating plate etc., and then adhered along the cavity surface of the female mold by vacuum molding and / or pressure molding. After that, it is general that the female mold and the male mold are closed, and a resin in a fluid state is injected and filled into the female mold from the male mold side to perform injection molding.
【0003】このような射出成形同時絵付方法によれ
ば、得るべき製品が凹凸の段差が大きい深絞り成形品で
あっても、その成形品形状に対応するキャビティ面に絵
付シートを追従させて密着させることができ、絵付シー
ト及び射出成形品を型の形状に忠実に成形することが可
能となった。なお、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、射出成形品の外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、後工程において、成形品外表面に
一体化した化粧シートのうちの基材シートのみを剥離
し、絵柄層等の転写層を成形品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。According to such a simultaneous injection molding painting method, even if the product to be obtained is a deep-drawing product having large irregularities, the painting sheet follows and closely adheres to the cavity surface corresponding to the shape of the product. Therefore, it becomes possible to mold the painted sheet and the injection-molded product faithfully to the shape of the mold. As the picture-added sheet, either a laminated laminated sheet (laminate sheet) or a transfer sheet is used depending on the product type, and when the sheet is a laminated sheet, the painting is performed as it is by injection molding. Then, the entire layer of the sheet is adhered and integrated with the outer surface of the injection-molded product to form a decorative layer. On the other hand, when the decorative sheet is a transfer sheet, only the base material sheet of the decorative sheet integrated on the outer surface of the molded product is peeled off in the subsequent step, and the transfer layer such as the pattern layer is transferred to the molded product side. Painting is completed by leaving it as a decorative layer.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、前記従
来方法では、絵付シートを平面状態から一気に真空吸引
/圧空供給により雌型キャビティ面に沿わせるように成
形するため、特に得るべき製品が深絞り成形品の場合、
型と絵付シートとの位置合わせが困難であった。すなわ
ち、図10(A)、(B)、(C)に簡略図示される如
くに、成形品に対して絵付シート5の絵柄模様等の装飾
パターンの位置を精度良く合わせたい場合、つまり、雌
型2のキャビティ面3の特定の点Xと絵付シートの点Y
を一致させたい場合、雌型2のキャビティ面3に絵付シ
ート5を供給して対向させた状態を示す(A)のよう
に、予め絵付シート5の延伸を考慮して雌型2のキャビ
ティ面における特定の点Xに対して絵付シート5の点Y
の位置(絵付シート5の供給位置)を定めておいても、
(B)のように絵付シート5に対する真空吸引/圧空供
給が行われると、軟化した絵付シートが空間中を長距離
移動するため、絵付シート5の点Yの位置はそのときの
条件(温度、圧力等)よって微妙にずれ、最終的には、
(C)のように点Xに対して無視できない距離αのずれ
が生じてしまうのである。また、このようなずれに伴っ
て、装飾パターンには歪みを生じてしまう。However, in the above-mentioned conventional method, since the picture-added sheet is formed so as to follow the female mold cavity surface from the planar state at once by vacuum suction / pressurized air supply, the product to be obtained is deep drawing. For goods,
It was difficult to align the mold with the painting sheet. That is, as shown in FIGS. 10 (A), 10 (B), and 10 (C), when it is desired to accurately align the position of the decorative pattern such as the picture pattern of the painting sheet 5 with the molded product, that is, the female Specific point X on the cavity surface 3 of the mold 2 and point Y on the painted sheet
When it is desired to match the above, the cavity surface 3 of the female mold 2 is preliminarily taken into consideration as shown in FIG. Point Y on the painting sheet 5 for a specific point X in
Even if the position of (the supply position of the painted sheet 5) is determined,
When vacuum suction / compressed air supply is performed on the decorative sheet 5 as in (B), the softened decorative sheet moves in the space for a long distance. Therefore, the position of the point Y on the decorative sheet 5 depends on the conditions (temperature, Due to pressure etc., there is a slight deviation, and finally,
As shown in (C), a deviation of the distance α with respect to the point X occurs. Further, such a deviation causes distortion in the decorative pattern.
【0005】また、成形品が深絞り成形品である場合に
は、絵付シートは大きく延伸せしめられることから、シ
ワ等の成形不良が発生しやすく、特に絵付シートが転写
シートである場合には、キャビティ面3のコーナー部に
おいてシートの伸びや応力の局部的集中により破れが生
じ、転写層の焼き付きによる剥離不良等の転写不良を起
こしやすい。When the molded product is a deep-drawing molded product, the decorative sheet is greatly stretched, so that molding defects such as wrinkles are likely to occur. Especially when the decorative sheet is a transfer sheet, At the corners of the cavity surface 3, breakage occurs due to sheet elongation and local concentration of stress, and transfer defects such as peeling defects due to seizure of the transfer layer are likely to occur.
【0006】本発明は、上述の如く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、雌型キャビ
ティ及び成形品に対する絵付シートの位置ずれ、及び装
飾パターンの歪みを生じ難くできるとともに、転写不
良、成形不良を起こし難くされた射出成形同時絵付方法
及び装置を提供することにある。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to make it difficult to cause the positional deviation of the painting sheet with respect to the female mold cavity and the molded product and the distortion of the decorative pattern. Another object of the present invention is to provide a simultaneous injection-molding painting method and apparatus in which transfer defects and molding defects are less likely to occur.
【0007】[0007]
【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方法は、帯状シート
又は枚葉シートからなる絵付シートを雌型のキャビティ
面に対向させ、先端面が前記雌型のキャビティ面の一部
を形成する移動型を前記絵付シート側に前進させて、該
移動型の先端面に前記絵付シートを吸着保持させ、この
絵付シートを吸着保持した前記移動型を後退させてその
先端面を前記キャビティ面の一部となし、その後、前記
雌型と雄型との型閉めを行って前記雌型内に前記雄型側
から流動状態の樹脂を注入充填して射出成形を行い、以
て射出成形品と前記絵付シートとを接着一体化させるよ
うにしてなる。In order to achieve the above-mentioned object, the injection molding simultaneous painting method according to the present invention is designed such that a painting sheet composed of a strip-shaped sheet or a sheet is made to face a cavity surface of a female mold, and a tip surface is formed. Is moving the movable die forming a part of the cavity surface of the female die toward the decorative sheet side to adsorb and hold the decorative sheet on the tip surface of the movable die, and the movable die that adsorbs and holds the decorative sheet. Back to form a part of the cavity surface at the front end surface, and then, the female mold and the male mold are closed, and a resin in a fluid state is injected and filled into the female mold from the male mold side. Then, injection molding is performed, and thus the injection molded product and the above-mentioned picture-added sheet are bonded and integrated.
【0008】また、本発明に係る射出成形同時絵付装置
は、対向配置されて一方が他方側へ移動できるようにさ
れてなる一対の雄型及び雌型を有し、前記雌型に、先端
面が該雌型のキャビティ面の一部を形成するとともに他
の部分から前記雄型側へ分離移動できるようにされてな
る移動型が設けられ、該移動型により帯状シート又は枚
葉シートからなる絵付シートを吸着保持して前記キャビ
ティ内に引き込むようにされてなる。The injection molding simultaneous painting apparatus according to the present invention has a pair of male and female dies that are arranged opposite to each other so that one of them can move to the other side. Is provided with a movable die that forms a part of the cavity surface of the female die and can be separated and moved from the other portion to the male die side. The sheet is sucked and held and drawn into the cavity.
【0009】本発明における移動型は、雌型キャビティ
面のうちの、特に絵付シートに対して相対的な位置ずれ
を生じ難くしたい部分を先端面として持つようになすこ
とが好ましく、その先端面において絵付シートを吸着保
持するようにされる。移動型における絵付シートの吸着
保持は、真空吸引や静電気等を利用したものを用いるこ
とができる。In the movable die according to the present invention, it is preferable to have a portion of the female die cavity surface, which is particularly desired to prevent relative displacement with respect to the decorative sheet, as the tip surface. The painted sheet is held by suction. In the movable type, suction holding of the decorated sheet can be performed by using vacuum suction, static electricity, or the like.
【0010】移動型の前進−後退は、成形機に移動用の
油圧アクチュエータ等を付設したり、あるいは、成形機
に備えられるエジェクタプレート駆動機構等を利用する
ことによって行われる。なお、後者の場合、移動型自体
をエジェクターピンとして利用することも可能である。
本発明において、絵付シートを雌型のキャビティ面に対
向配置するには、長尺帯状(ウエブ状)シートを巻き取
りとして供給し、巻き出し機から絵付シートを巻き出し
て成形同時絵付の後、巻き取り機を用いて該シートを巻
き取るロール/ロール方式でもよいし、予め枚葉にカッ
トされた絵付シートを保持する吸着盤等を備えたロボッ
ト(マニュピュレーター)等で一枚づつ搬送する方式で
もよい。The advance / retreat of the movable die is performed by attaching a moving hydraulic actuator or the like to the molding machine, or by utilizing an ejector plate drive mechanism provided in the molding machine. In the latter case, the movable type itself can be used as the ejector pin.
In the present invention, in order to arrange the painted sheet facing the cavity surface of the female mold, a long strip-shaped (web-shaped) sheet is supplied as a roll, and the painted sheet is unwound from the unwinding machine, and after simultaneous painting with molding, A roll / roll method of winding the sheet using a winding machine may be used, or the sheet may be conveyed one by one by a robot (manipulator) or the like that is equipped with a suction plate or the like that holds the pre-cut sheet with pictures. The method may be used.
【0011】絵付シートの絵柄模様等の装飾パターンと
雌型キャビティ面(成形品)との位置決めを高い精度で
行うには、絵付シートに例えば「+」字形、「−」字
形、「I」字形等の位置決めマークを設け、これを型側
又は移動型自体に設けた光電管、イメージセンサ等で検
知してサーボモータ等のシート供給機構の動作を制御す
ればよい。In order to perform the positioning of the decorative pattern such as a picture pattern of the painting sheet and the female cavity surface (molded product) with high accuracy, for example, a "+" shape, a "-" shape, and an "I" shape are formed on the painting sheet. It is only necessary to provide positioning marks such as, and detect this with a photoelectric tube, an image sensor or the like provided on the mold side or the movable mold itself to control the operation of the sheet feeding mechanism such as a servo motor.
【0012】絵付シートは、ロール状に巻き取られた長
尺の連続帯状シートの状態から必要量づつ(1ショット
分づつ)供給するようにしてもよいし、予め所定寸法に
裁断した枚葉シートを供給するようにしてもよい。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。基材シートとしては、ポリ塩化ビニル、アク
リル、ポリスチレン、ABS樹脂、ポリカーボネート、
ポリエステル、ポリプロピレン、ナイロン等の熱可塑性
樹脂、あるいは、ゴム、ウレタンエラストマー等のエラ
ストマー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、金属薄膜等を用いることが
できる。The picture-added sheet may be supplied in the required amount (in units of one shot) from the state of a long continuous strip-shaped sheet wound in a roll or may be cut into a predetermined size in advance. May be supplied. The decorative sheet is composed of a base sheet and a decorative layer laminated on the base sheet, and is a laminated laminated sheet (laminate sheet) that is used as a final product while the base sheet is closely adhered to the molded product and integrated, or a decorative sheet once. It is possible to use any of transfer sheets in which the base sheet is peeled off after leaving the decorative layer (transfer layer) only on the molded article side after the above and the molded article are integrated. As the base sheet, polyvinyl chloride, acrylic, polystyrene, ABS resin, polycarbonate,
A thermoplastic resin such as polyester, polypropylene or nylon, or an elastomer such as rubber or urethane elastomer can be used. The thickness of the base sheet is
Usually, it is about 20 to 500 μm. As the decorative layer, a printed pattern, a colored or transparent coating, a metal thin film, or the like can be used.
【0013】射出成形用の流動状態の樹脂としては、A
BS(アクリロニトリル・ブタジエン・スチレン共重合
体)、ポリスチレン、ポリカーボネート、アクリル、ポ
リプロピレン等の熱可塑性樹脂を加熱熔融したもの、あ
るいは、二液硬化型、触媒硬化型の樹脂、例えば、ポリ
ウレタン、ポリエステル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る。A resin in a fluid state for injection molding is A
Thermoplastic resin such as BS (acrylonitrile / butadiene / styrene copolymer), polystyrene, polycarbonate, acryl, polypropylene, etc., which is heated and melted, or two-component curing type and catalyst curing type resins such as polyurethane and polyester. Conventionally known materials can be used for simultaneous injection molding such as uncured liquid.
【0014】本発明の射出成形同時絵付方法及び装置
は、特に、絞り量(凹凸段差)の大きい(深い)深絞り
成形品や複雑な形状の成形品に絵付けを行う場合に特に
有効である。なお、このような深絞り成形品を得るにあ
たっては、絵付シートを公知の熱盤等によって加熱軟化
(予備成形)させた後、移動型で吸着保持してキャビテ
ィ面に沿わせるようにしてもよい。ただし、このように
なすことは、絵付シートの成形性、形状追従性の点では
良好であるが、絵付シートの延伸量が大きくなるので、
予備成形を行わない場合に比して雌型キャビティ面と絵
付シートの装飾パターンとの位置ずれは大きくなりやす
い。The simultaneous injection-molding painting method and apparatus of the present invention is particularly effective for painting a deep-drawing product having a large (deep) drawing amount and a molded product having a complicated shape. . In order to obtain such a deep-drawing-formed product, after heating and softening (preforming) the sheet with a known heating plate or the like, the sheet may be sucked and held by a movable die so as to be along the cavity surface. . However, doing so is good in terms of formability and shape-following property of the painting sheet, but since the stretching amount of the painting sheet becomes large,
The positional deviation between the female mold cavity surface and the decorative pattern of the decorative sheet is likely to be large as compared with the case where preforming is not performed.
【0015】上述の如くの構成とされた本発明に係る射
出成形同時絵付方法においては、移動型を絵付シート側
に前進させて、その先端面に絵付シートを吸着保持させ
る。これにより絵付シートの特定部位がキャビティ面の
一部を形成する移動型の先端面に固定され、そのまま移
動型を後退させて絵付シートをキャビティ内に引込み、
その先端面を前記キャビティ面の一部となすとともに、
さらに必要に応じて、真空吸引等により絵付シートをキ
ャビティ面全体に沿わせて密着させ、しかる後、通常の
射出成形を行う。In the injection molding simultaneous painting method according to the present invention having the above-mentioned structure, the movable die is advanced to the side of the painting sheet, and the tip end surface of the painting sheet is adsorbed and held. As a result, a specific portion of the decorative sheet is fixed to the tip surface of the movable die that forms a part of the cavity surface, the movable die is retracted as it is, and the decorative sheet is drawn into the cavity.
While forming the tip surface as a part of the cavity surface,
Further, if necessary, the drawing sheet is brought into close contact with the entire cavity surface by vacuum suction or the like, and then ordinary injection molding is performed.
【0016】このようになすことにより、剛体の移動型
が絵付シートを吸着保持したまま剛体の雌型に対して機
械的に移動しながら絵付シートをキャビティ内に引き込
むようにされるので、従来のように加熱軟化した絵付シ
ートが真空吸引・圧空供給により延伸せしめられて不定
形で、自由空間中を何物にも支持されることなくキャビ
ティに引き込まれる場合に比して、成形品に対する絵付
シート(の装飾パターン)の位置ずれを生じ難くできて
位置合わせ精度が格段に向上するとともに、転写不良、
成形不良を起こし難くできる。By doing so, since the movable die of the rigid body mechanically moves with respect to the female die of the rigid body while sucking and holding the decorative sheet, the decorative sheet is drawn into the cavity. As compared with the case where the heated softened painted sheet is stretched by vacuum suction and compressed air supply and has an indefinite shape and is drawn into the cavity without being supported by anything in the free space, the painted sheet for molded products (Ornamental pattern) is less likely to be misaligned, and the alignment accuracy is significantly improved.
Molding failure can be made less likely to occur.
【0017】[0017]
【発明の実施の形態】以下に図面を参照して本発明の実
施例を詳細に説明する。図1は、本発明による射出成形
同時絵付装置の一実施例を示す概略図である。図示例の
装置10は、得るべき成形品に対応した凸凹形状の雄型
11と雌型12とを備え、雄型11は固定盤13に固定
され、雌型12はエジェクタ部16を介して可動盤14
に固定されていて、流体圧シリンダ17のラム18によ
り前記雄型12に対して接近−離隔する方向(水平方
向)に進退動するようされている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of an injection molding simultaneous painting apparatus according to the present invention. The apparatus 10 of the illustrated example includes a male mold 11 and a female mold 12 having an irregular shape corresponding to a molded product to be obtained. The male mold 11 is fixed to a stationary platen 13, and the female mold 12 is movable via an ejector portion 16. Board 14
The ram 18 of the fluid pressure cylinder 17 is adapted to move back and forth in a direction (horizontal direction) toward and away from the male die 12.
【0018】前記可動盤13と雌型14との間に設けら
れたエジェクタ部16には、通常は、得られた射出成形
品を型外に排出するための突き出しピン(図示省略)が
配置されるが、本例においては、先端面30aが前記雌
型12のキャビティ面20の一部を形成するとともに他
の部分から前記雄型11側へ分離移動できるようにされ
てなる断面概略T字形の移動型30の基部が摺動自在に
配されている。この移動型30の前進−後退移動は、油
圧式のエジェクタプレート駆動機構等を利用することに
よって行われる。なお、ここでは、移動型自体をエジェ
クターピンとして利用することもできる。The ejector portion 16 provided between the movable plate 13 and the female die 14 is usually provided with ejection pins (not shown) for ejecting the obtained injection-molded article out of the die. However, in this example, the tip end surface 30a forms a part of the cavity surface 20 of the female die 12 and can be separated and moved from the other portion to the male die 11 side. The base of the movable die 30 is slidably arranged. The forward-backward movement of the movable die 30 is performed by using a hydraulic ejector plate drive mechanism or the like. Here, the movable type itself can also be used as the ejector pin.
【0019】前記移動型30の基部内には吸気管32が
配設され、この吸気管32と先端面30a側の外部とを
連通させるように真空吸引孔33が穿設されている。前
記固定盤11及び雄型13の中央部には射出成形機のノ
ズル25が挿着されており、前記射出成形機のノズル2
5からの流動状態の熔融樹脂は、雄型11に穿設された
ランナー26及びその先端のゲートを通じて雌型12の
キャビティ内に射出される。An intake pipe 32 is arranged in the base of the movable die 30, and a vacuum suction hole 33 is formed so as to connect the intake pipe 32 and the outside on the side of the front end face 30a. A nozzle 25 of an injection molding machine is inserted in the central portions of the fixed plate 11 and the male mold 13, and the nozzle 2 of the injection molding machine is inserted.
The molten molten resin from No. 5 is injected into the cavity of the female mold 12 through the runner 26 bored in the male mold 11 and the gate at the tip thereof.
【0020】また、前記雌型12の上方には、ロール
(巻き取り)状の絵付シート5が配されている。この絵
付シート5は、長尺の連続帯状シートの状態で送りロー
ラ22、24により引き出されて必要量づつ(1ショッ
ト分づつ)前記雌型12のキャビティ面20に対向する
位置まで送り出されるよううになっている。また、絵付
シート5の搬送位置の検出は、雌型12の上面に配置さ
れたイメージセンサ38により絵付シート5に設けられ
た「+」等のマークMを検出し、所定の位置(通常はマ
ークとイメージセンサが一致した所)で絵付シートを停
止させるべく、絵付シートロールの巻き出し、巻き戻
し、あるいは絵付シートの幅方向への移動を、サーボモ
ータ、ステップモータ等で制御することより行われる。Above the female die 12, a roll-shaped drawing sheet 5 is arranged. The picture-added sheet 5 is drawn out by the feed rollers 22 and 24 in the state of a long continuous strip-shaped sheet, and is fed by a required amount (by one shot) to a position facing the cavity surface 20 of the female die 12. Has become. Further, the conveyance position of the picture-added sheet 5 is detected by detecting the mark M such as “+” provided on the picture-added sheet 5 by the image sensor 38 arranged on the upper surface of the female die 12, and determining the predetermined position (usually the mark). (Where the image sensor and the image sensor match), the drawing sheet roll is unwound, rewound, or the drawing sheet is moved in the width direction by a servo motor or step motor to stop the drawing sheet. .
【0021】このような構成とされた本実施例の装置1
0においては、次のようにして射出成形成形同時絵付が
行われる。まず、帯状シートからなる絵付シート5が送
りローラ22、24により引き出されて、マークMがセ
ンサ40に検出される位置まで、言い換えれば1ショッ
ト分が前記雌型12のキャビティ面20に対向する位置
まで搬送される。The apparatus 1 of this embodiment having such a configuration
In No. 0, simultaneous injection molding and painting are performed as follows. First, the decorated sheet 5 made of a belt-shaped sheet is pulled out by the feed rollers 22 and 24 and the mark M is detected by the sensor 40. In other words, one shot is opposed to the cavity surface 20 of the female die 12. Be transported to.
【0022】次に、図2に示される如くに、移動型30
が絵付シート5側に前進せしめられるとともに、吸気管
32及び真空吸引孔33を通じて真空吸引が行われ、移
動型30の先端面30aに絵付シート5が吸着保持され
る。これにより絵付シート5の特定部位がキャビティ面
20の一部を形成する移動型30の先端面30aに固定
される。ここで、本例においては、成形品に対して絵付
シート5の絵柄模様等の装飾パターンの位置を精度良く
合わせるべく、雌型12のキャビティ面20の一部を形
成する移動型30の先端面30aの特定の点X(この場
合は中心点)に絵付シート5の点Y(ここが寸法精度を
要する絵柄の中心部となる)が一致せしめられる。Next, as shown in FIG.
Is advanced to the side of the decorative sheet 5, and vacuum suction is performed through the suction pipe 32 and the vacuum suction hole 33, and the decorative sheet 5 is suction-held on the front end surface 30a of the movable die 30. As a result, a specific portion of the painted sheet 5 is fixed to the tip surface 30a of the movable die 30 forming a part of the cavity surface 20. Here, in this example, in order to accurately align the position of the decorative pattern such as the picture pattern of the painting sheet 5 with the molded product, the tip surface of the movable die 30 forming a part of the cavity surface 20 of the female die 12. A specific point X (center point in this case) of 30a is made to coincide with a point Y of the picture-added sheet 5 (this is the central portion of the pattern requiring dimensional accuracy).
【0023】なお、図2等では、真空吸引孔33は一本
の場合を図示しているが、先端面30aへの絵付シート
の吸着保持と位置ずれ、歪みをより確実に抑えるため
に、真空吸引孔3を分岐させて先端面30aを複数個開
口させ、絵付シートを多点で吸着したり、あるいは、移
動型30の先端面30a付近を多孔質金属とし、先端面
30a全面で吸着するようにしてもよい。Although FIG. 2 and the like show the case where there is only one vacuum suction hole 33, in order to more reliably suppress the suction holding of the painting sheet on the leading end surface 30a and the displacement and distortion, the vacuum suction hole 33 is used. The suction holes 3 are branched so that a plurality of front end surfaces 30a are opened to adsorb the painted sheet at multiple points, or the vicinity of the front end surface 30a of the movable die 30 is made of porous metal so that the entire front end surface 30a is adsorbed. You may
【0024】続いて、移動型30の先端面30aに絵付
シート5が吸着保持されている状態で、図3に示される
如くに、そのまま移動型30が後退せしめられて、絵付
シート5がキャビティ内に引き込まれ、移動型30の先
端面30aが前記キャビティ面20の一部とされる。そ
して、前記吸気管32及び真空吸引孔33を通じての真
空吸引により、この際にも、前記移動型30の先端面3
0a(キャビティ面20)の点Xと絵付シート5の点Y
とは一致したままでずれは生じない。Subsequently, in a state in which the decorative sheet 5 is adsorbed and held on the front end surface 30a of the movable die 30, as shown in FIG. 3, the movable die 30 is retracted as it is, and the decorative sheet 5 is placed in the cavity. And the tip surface 30a of the movable die 30 becomes a part of the cavity surface 20. Then, by vacuum suction through the suction pipe 32 and the vacuum suction hole 33, the tip surface 3 of the movable die 30 is also held at this time.
Point X of 0a (cavity surface 20) and point Y of the painted sheet 5
It is consistent with and there is no deviation.
【0025】なお、絵付シート5とキャビティ面20と
の間に空気が残留する場合、又は、移動型30の引込み
吸引作用だけでは絵付シート5をキャビティ面に沿わせ
て密着させることができない場合には、図5に例示れさ
る如くに、空気が残留しやすく又転写不良、成形不良の
生じやすい例えばキャビティコーナー部に開口するよう
に真空吸引通路37、37を設け、前記吸気管32及び
真空吸引孔33に加えて、前記真空吸引通路37、37
を通じて真空吸引を行うようにしてもよい。この場合の
真空吸引通路37、37を通じての真空吸引は、移動型
30の先端面30aに絵付シート5が吸着保持されてか
ら開始する。位置ずれや歪みを嫌う部分が絵付シートの
うち移動型30の先端面30aに吸着される部分のみで
あり、その他の部分では位置ずれや歪みに厳密さを要し
ないような場合には、図3の状態で射出成形を行なって
もよい。When air remains between the decorative sheet 5 and the cavity surface 20, or when the drawing sheet 5 cannot be brought into close contact with the cavity surface only by the drawing and suction action of the movable die 30. As shown in FIG. 5, air is apt to remain and transfer defects and molding defects are likely to occur. For example, vacuum suction passages 37, 37 are provided so as to open at the cavity corners, and the suction pipe 32 and the vacuum suction passages are provided. In addition to the holes 33, the vacuum suction passages 37, 37
Vacuum suction may be performed through. In this case, vacuum suction through the vacuum suction passages 37, 37 starts after the decorative sheet 5 is suction-held on the front end surface 30a of the movable die 30. In the case where only the portion of the painted sheet that is disliked by the positional displacement or distortion is adsorbed to the front end surface 30a of the movable die 30 and the other portions do not require strictness for the positional displacement or distortion, FIG. The injection molding may be performed in this state.
【0026】このようにして、絵付シート5をキャビテ
ィ面20全体に沿わせて密着させた後、図4に示される
如くに、ラム18により前記雌型12を前進させて雄型
11との型閉めを行い、雌型と雄型とで形成されたキャ
ビティ(窩洞空間)内に前記雄型11側のノズル25か
ら流動状態の熔融樹脂50を注入充填して射出成形を行
い、熔融樹脂を冷却固化せしめ、以て射出成形品と前記
絵付シート5とを接着一体化させ、その後、型開きを行
って絵付成形品(製品)を取り出す。また、絵付シート
が転写シートの場合は、取り出し後、基材シートのみを
成形品から剥離除去する。In this way, after the picture-attached sheet 5 is adhered along the entire cavity surface 20, the female die 12 is advanced by the ram 18 to form a mold with the male die 11 as shown in FIG. After closing, the molten resin 50 in a fluid state is injected and filled from the nozzle 25 on the male mold 11 side into the cavity (cavity space) formed by the female mold and the male mold, and injection molding is performed to cool the molten resin. After being solidified, the injection-molded product and the above-mentioned decorative sheet 5 are bonded and integrated, and then the mold is opened to take out the decorative molded product (product). Further, when the decorative sheet is a transfer sheet, only the base sheet is peeled and removed from the molded product after taking out.
【0027】このようになすことにより、剛体の移動型
30が絵付シート5をその先端面30aで吸着保持した
まま、剛体の雌型12に対して機械的に移動しながら絵
付シート5をキャビティ内に引き込むようにされるの
で、従来のように加熱軟化した絵付シートが真空吸引・
圧空供給により延伸せしめられて不定形で何物にも支持
されることなく自由空間中を移動してキャビティに引き
込まれる場合に比して、成形品に対する絵付シート(の
装飾パターン)の位置ずれを生じ難くできて、金型形状
(成形品形状)と装飾パターンとの位置合わせ精度が格
段に向上し、また、装飾パターンの歪みも生じなくする
とともに、絵付シート5の一部が移動型30により固定
されるので転写不良、成形不良を起こし難くできる。By doing so, the rigid movable die 30 mechanically moves with respect to the rigid female die 12 while the decorative sheet 5 is adsorbed and held by the tip end surface 30a of the rigid sheet 5, and the decorative sheet 5 is kept inside the cavity. Since it is designed to be drawn into
Compared to the case where the sheet is stretched by compressed air supply and moves in free space without being supported by anything in an indeterminate shape and is drawn into the cavity, the misalignment of the decorative sheet (decorative pattern) with respect to the molded product It can be made less likely to occur, the alignment accuracy between the mold shape (molded product shape) and the decorative pattern is significantly improved, distortion of the decorative pattern does not occur, and part of the painting sheet 5 is moved by the movable mold 30. Since it is fixed, transfer failure and molding failure can be made less likely to occur.
【0028】図6〜図9は、本発明に係る射出成形同時
絵付方法及び装置の他の例(インサート成形)を示し、
前述した図1〜図5に示される例の各部に対応する部分
には同一の符号を付して重複説明を省略し、以下におい
ては相違点を説明する。この例においては、図6に示さ
れる如くに、予め所定の寸法形状に切断された枚葉シー
トからなる絵付シート5’を搬送ロボット60によりそ
の吸着盤62、62で吸着保持したまま雌型12のキャ
ビティ面20に対向する位置まで搬送する。なお、搬送
ロボット60は射出成形同時絵付終了後においてキャビ
ティ内から製品を取り出す際にも利用される。6 to 9 show another example (insert molding) of the injection molding simultaneous painting method and apparatus according to the present invention,
Portions corresponding to the respective portions of the examples shown in FIGS. 1 to 5 described above are denoted by the same reference numerals, duplicate description thereof will be omitted, and different points will be described below. In this example, as shown in FIG. 6, the female die 12 is provided with the drawing sheet 5 ′, which is a sheet that has been cut into a predetermined size and shape in advance, while being sucked and held by the suction plates 62, 62 by the transport robot 60. It is conveyed to a position facing the cavity surface 20 of. The transfer robot 60 is also used when the product is taken out of the cavity after the simultaneous injection molding and painting.
【0029】次に、前述した例と同様に、移動型30が
絵付シート5’側に前進せしめられるとともに、図7に
示される如くに、吸気管32及び真空吸引孔33を通じ
て真空吸引が行われ、ロボット60の吸着盤62による
吸着保持が解かれると同時に、移動型30の先端面30
aに絵付シート5’が吸着されて、絵付シート5’のロ
ボット60から移動型30への移し替えが行われる。こ
の際、絵付シート5’の特定部位がキャビティ面20の
一部を形成する移動型30の先端面30aに固定され
る。ここで、本例においても、移動型30の先端面30
aの特定の点Xに絵付シート5’の点Yが一致せしめら
れる。Next, similarly to the above-described example, the movable die 30 is advanced to the side of the decorative sheet 5 ', and vacuum suction is performed through the intake pipe 32 and the vacuum suction hole 33 as shown in FIG. At the same time that the suction holding by the suction plate 62 of the robot 60 is released, the front end surface 30 of the movable die 30
The decorative sheet 5'is adsorbed on a, and the decorative sheet 5'is transferred from the robot 60 to the movable die 30. At this time, a specific portion of the decorative sheet 5'is fixed to the tip surface 30a of the movable die 30 forming a part of the cavity surface 20. Here, also in the present example, the front end surface 30 of the movable die 30.
The point Y of the picture-added sheet 5 ′ is made to coincide with the specific point X of “a”.
【0030】続いて、移動型30の先端面30aに絵付
シート5’が吸着保持されている状態で、図8に示され
る如くに、そのまま移動型30が後退せしめられて、絵
付シート5’がキャビティ内に移動せしめられ、移動型
30の先端面30aが前記キャビティ面20の一部とさ
れる。そして、必要に応じて図5と同様な真空吸引孔を
通じての真空吸引により絵付シート5’をキャビティ面
20全体に沿わせて密着させる(図8)。この際にも、
前記移動型30の先端面30a(キャビティ面20)の
点Xと絵付シート5の点Yとは一致したままでずれは生
じない。Subsequently, in a state where the decorative sheet 5'is suction-held on the front end surface 30a of the movable die 30, as shown in FIG. 8, the movable die 30 is retracted as it is, and the decorative sheet 5'is left. It is moved into the cavity, and the tip surface 30a of the movable die 30 becomes a part of the cavity surface 20. Then, if necessary, the decorative sheet 5'is brought into close contact along the entire cavity surface 20 by vacuum suction through the same vacuum suction holes as in FIG. 5 (FIG. 8). At this time,
The point X on the front end surface 30a (cavity surface 20) of the movable die 30 and the point Y on the decorative sheet 5 remain the same and no deviation occurs.
【0031】このようにして、絵付シート5をキャビテ
ィ面20全体に沿わせて密着させた後、図9に示される
如くに、前記雌型12を前進させて雄型11との型閉め
を行い、雌型と雄型で形成されるキャビティ内に前記雄
型11側のノズル25から流動状態の熔融樹脂50を注
入充填して射出成形を行い、以て射出成形品と前記絵付
シート5とを接着一体化させ、絵付成形品を得る。In this way, after the pictured sheet 5 is brought into close contact along the entire cavity surface 20, the female die 12 is advanced to close the male die 11 as shown in FIG. The molten resin 50 in a fluid state is injected and filled from the nozzle 25 on the male mold 11 side into the cavity formed by the female mold and the male mold to perform injection molding, and thus the injection molded product and the decorated sheet 5 are formed. Adhesive integration is performed to obtain a molded article with a picture.
【0032】このように絵付シート5’が枚葉シートで
ある場合も、前記した例と略同様の作用効果が得られ
る。Even when the decorative sheet 5'is a sheet as described above, substantially the same operational effects as those of the above-described example can be obtained.
【0033】[0033]
【発明の効果】本発明に係る射出成形同時絵付方法及び
装置によれば、移動型で絵付シートを吸着保持して雌型
キャビティ内に引き込むようにされるので、従来のよう
に加熱軟化した絵付シートが真空吸引・圧空供給により
延伸せしめられて不定形で何物にも支持されずに自由空
間を長距離移動しキャビティに引き込まれる場合に比し
て、成形品に対する絵付シート(の装飾パターン)の位
置ずれや装飾パターンの歪みを生じ難くできて位置合わ
せ精度を格段に向上できるとともに、転写不良、成形不
良を起こし難くできるいう優れた効果を奏する。According to the simultaneous injection-molding painting method and apparatus according to the present invention, since the painting sheet is sucked and held by the movable die and drawn into the female mold cavity, the painting softened by heating as in the prior art is performed. Compared to the case where the sheet is stretched by vacuum suction and compressed air supply, has an indefinite shape, is moved by a long distance in a free space without being supported by anything, and is drawn into the cavity (a decorative pattern for the molded product) It is possible to prevent positional deviation and distortion of the decorative pattern from occurring easily, and it is possible to remarkably improve the alignment accuracy, and it is possible to prevent transfer defects and molding defects from occurring.
【図1】本発明による射出成形同時絵付装置の一実施例
を示す概略構成図。FIG. 1 is a schematic configuration diagram showing an embodiment of an injection molding simultaneous painting apparatus according to the present invention.
【図2】本発明による射出成形同時絵付方法の一工程を
示す図。FIG. 2 is a diagram showing one step of the injection molding simultaneous painting method according to the present invention.
【図3】図2に示される工程の次の工程を示す図。FIG. 3 is a diagram showing a step subsequent to the step shown in FIG.
【図4】図3に示される工程の次の工程を示す図。FIG. 4 is a diagram showing a step subsequent to the step shown in FIG.
【図5】図1に示される装置の変形例を示す概略構成
図。5 is a schematic configuration diagram showing a modified example of the apparatus shown in FIG.
【図6】本発明による他の射出成形同時絵付方法及び装
置を示す図。FIG. 6 is a view showing another injection molding simultaneous painting method and apparatus according to the present invention.
【図7】図6に示される工程の次の工程を示す図。FIG. 7 is a diagram showing a step subsequent to the step shown in FIG. 6.
【図8】図7に示される工程の次の工程を示す図。FIG. 8 is a diagram showing a step subsequent to the step shown in FIG.
【図9】図8に示される工程の次の工程を示す図。9 is a diagram showing a step that follows the step shown in FIG. 8. FIG.
【図10】従来の射出成形同時絵付方法及び装置におけ
る問題の説明に供される図。FIG. 10 is a diagram which is used for explaining a problem in a conventional injection molding simultaneous painting method and apparatus.
5、5’ 絵付シート 10 射出成形同時絵付装置 11 雄型 12 雌型 20 キャビティ面 25 ノズル 30 移動型 30a 先端面 33 真空吸引孔 40 イメージセンサ 50 流動状態の熔融樹脂 5, 5'Painted sheet 10 Injection molding simultaneous painting device 11 Male type 12 Female type 20 Cavity surface 25 Nozzle 30 Movable type 30a Tip surface 33 Vacuum suction hole 40 Image sensor 50 Melting resin in a flowing state
Claims (2)
シートを雌型のキャビティ面に対向させ、先端面が前記
雌型のキャビティ面の一部を形成する移動型を前記絵付
シート側に前進させて、該移動型の先端面に前記絵付シ
ートを吸着保持させ、この絵付シートを吸着保持した前
記移動型を後退させてその先端面を前記キャビティ面の
一部となし、その後、前記雌型と雄型との型閉めを行っ
て前記雌型内に前記雄型側から流動状態の樹脂を注入充
填して射出成形を行い、以て射出成形品と前記絵付シー
トとを接着一体化させるようにしてなる射出成形同時絵
付方法。1. A movable sheet whose front end surface forms a part of the cavity surface of the female die is advanced to the side of the decorative sheet side, with a decorative sheet made of a strip-shaped sheet or a single sheet facing the cavity surface of the female die. Then, the tip of the moving die is made to adsorb and hold the decorative sheet, and the movable die that adsorbs and holds the adhering sheet is retracted to form the tip surface as a part of the cavity surface, and then to the female die. A mold is closed with a male mold, and a resin in a fluid state is injected and filled into the female mold from the male mold side to perform injection molding, whereby the injection molded product and the painting sheet are bonded and integrated. Injection molding simultaneous painting method.
るようにされてなる一対の雄型及び雌型を有し、前記雌
型に、先端面が該雌型のキャビティ面の一部を形成する
とともに他の部分から前記雄型側へ分離移動できるよう
にされてなる移動型が設けられ、該移動型により帯状シ
ート又は枚葉シートからなる絵付シートを吸着保持して
前記キャビティ内に引き込むようにされてなる射出成形
同時絵付装置。2. A pair of male and female dies that are arranged so as to face each other so that one of them can move to the other side, and the distal end surface of the female mold has a part of the cavity surface of the female mold. A movable die is provided which is formed and can be separated and moved from the other part to the male die side, and the movable die sucks and holds a decorative sheet consisting of a strip-shaped sheet or a sheet-like sheet and draws it into the cavity. The injection molding simultaneous painting device which is made like this.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25357495A JPH0994846A (en) | 1995-09-29 | 1995-09-29 | Method and apparatus for simultaneous injection molding and foil decorating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25357495A JPH0994846A (en) | 1995-09-29 | 1995-09-29 | Method and apparatus for simultaneous injection molding and foil decorating |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0994846A true JPH0994846A (en) | 1997-04-08 |
Family
ID=17253276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25357495A Pending JPH0994846A (en) | 1995-09-29 | 1995-09-29 | Method and apparatus for simultaneous injection molding and foil decorating |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0994846A (en) |
-
1995
- 1995-09-29 JP JP25357495A patent/JPH0994846A/en active Pending
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