JP4459585B2 - Manufacturing method for simultaneously molded decorative molded products - Google Patents

Manufacturing method for simultaneously molded decorative molded products Download PDF

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JP4459585B2
JP4459585B2 JP2003341692A JP2003341692A JP4459585B2 JP 4459585 B2 JP4459585 B2 JP 4459585B2 JP 2003341692 A JP2003341692 A JP 2003341692A JP 2003341692 A JP2003341692 A JP 2003341692A JP 4459585 B2 JP4459585 B2 JP 4459585B2
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mold
sheet
resin
layer
decorative
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JP2005104002A (en
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濱野浩二
豊岡尚登
森富士男
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Nissha Printing Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14827—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using a transfer foil detachable from the insert

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

成形同時転写法は、射出成形金型のＡ金型とＢ金型との間に基体シート上に転写層を備えた転写シートを配置し、Ａ金型とＢ金型との型閉めにより形成した成形用空間内に成形樹脂を注入して射出成形品を形成すると同時に射出成形品の表面に転写層を一体化接着させる方法である。   In the simultaneous molding and transfer method, a transfer sheet having a transfer layer is disposed on a base sheet between the A mold and the B mold of an injection mold, and the mold is closed by closing the A mold and the B mold. In this method, a molding resin is injected into the molding space to form an injection molded product, and at the same time, a transfer layer is integrally bonded to the surface of the injection molded product.

そして、最近では、意匠性の向上や成形樹脂表面の物性向上のニーズから、特許文献１のような成形樹脂層の片面のみならず、両面に転写層を設ける成形同時転写法が脚光を浴びている。このような成形同時転写法の場合には、転写シートをＡ金型およびＢ金型の両方の射出成形金型に配置し、成形樹脂を注入するのが一般的である。   Recently, due to the need for improvement in design properties and physical properties of the molded resin surface, the simultaneous molding transfer method in which a transfer layer is provided on both sides as well as on one side of the molded resin layer as in Patent Document 1 has attracted attention. Yes. In the case of such a simultaneous molding transfer method, it is common to place the transfer sheet in both the A mold and the B mold and to inject the molding resin.

特開平６−９９４５７号JP-A-6-99457

しかし、成形樹脂層の両面に転写層を形成する場合、型開きに際し、得られる成形同時転写成形品が、Ａ金型の側に保持されたり、Ｂ金型の側に保持されたり、あるいはどちらにも保持されずに型開きと同時に射出成形金型から落してしまうことがあり、大量生産時おいて連続的かつ安定的に成形同時両面転写成形品を回収することが困難になる問題が生じていた。   However, when the transfer layer is formed on both surfaces of the molding resin layer, when the mold is opened, the resulting molded simultaneous transfer molded product is held on the A mold side, on the B mold side, or either However, it may be dropped from the injection mold at the same time as the mold is opened, and it becomes difficult to collect the double-sided transfer molded products continuously and stably during mass production. It was.

そこで、本発明者は、前記課題を解決するために次のような発明をした。   Therefore, the present inventor has made the following invention in order to solve the above problems.

第１の発明は、基体シート上に転写層が設けられた転写シートをエジェクタピンが付設されている射出成形金型のＡ金型に配置し、加飾層が設けられた加飾シートを射出成形金型のＢ金型に配置した後、Ａ金型とＢ金型との型閉めにより成形用空間部を形成し、その成形用空間部に成形樹脂を注入して射出成形品を形成すると同時に転写層及び加飾シートを一体化形成させる成形同時加飾成形品の製造方法であって、加飾シートのＢ金型からの離型重さは、１００ｇ／ｃｍ未満に設定され、転写層の基体シートからの離型重さは、加飾シートのＢ金型からの離型重さの１．１倍以上に設定され、型開き後に成形同時加飾成形品がＡ金型に保持されるようにしたものである。
1st invention arrange | positions the transfer sheet in which the transfer layer was provided on the base sheet in the A mold | die of the injection molding die to which the ejector pin is attached, and injects the decoration sheet in which the decoration layer was provided When the molding space is formed by closing the A mold and the B mold after being arranged in the B mold of the molding mold, and an injection molded product is formed by injecting molding resin into the molding space. a simultaneous transfer layer and decorative mold decorating molded article production method of causing the sheet to the integrated form, releasing the weight of the B mold decorating sheet is set to less than 100 g / cm, transfer layer The mold release weight from the base sheet is set to 1.1 times or more the mold release weight from the B mold of the decorative sheet, and the molded and simultaneously decorated molded product is held in the A mold after the mold is opened. It was made to do.

第２の発明は、第１の発明の構成において、Ｂ金型は、型開きと同時に作動する第二エジェクタピンを更に備えたものである。According to a second aspect of the present invention, in the configuration of the first aspect, the B mold further includes a second ejector pin that operates simultaneously with the mold opening.

したがって、本発明の成形同時加飾成形品の製造方法によれば、得られる成形同時加飾成形品が絶えずＡ金型の側に保持され、Ａ金型の側に付設されているエジェクタピンによって、成形同時加飾成形品を突き出すことができるため、回収装置が常に同じ方向で作動することができるので、大量生産時において連続的かつ安定的に成形同時加飾成形品を回収することができる効果がある。   Therefore, according to the method for producing a simultaneously molded decorative molded product of the present invention, the molded simultaneous decorated molded product obtained is constantly held on the side of the A mold and is ejected by an ejector pin attached to the side of the A mold. Since the molding simultaneous decorative molded product can be ejected, the recovery device can always operate in the same direction, so that the simultaneous and decorative molded product can be recovered continuously and stably during mass production. effective.

また、本発明に係る転写シート、加飾シートおよび射出成形金型によれば、射出成形品の形状をＡ金型の側に保持させやすいようにしなくとも、成形同時加飾成形品をＡ金型の側に保持させることができるため、成形同時加飾成形品の形状の選択範囲が拡大する効果がある。   In addition, according to the transfer sheet, the decorative sheet, and the injection mold according to the present invention, the molding simultaneous decorative molded product can be made into the A mold without making it easy to hold the shape of the injection molded product on the side of the A mold. Since it can hold | maintain at the side of a type | mold, there exists an effect which the selection range of the shape of a shaping | molding simultaneous decoration molded product expands.

以下、図面を参照しながら本発明の第１態様の成形同時加飾成形品の製造方法の発明を説明する。この発明の成形同時加飾成形品１０の製造方法は、転写シート２をＡ金型５に配置し、加飾シート３をＢ金型６に配置した後、Ａ金型５とＢ金型６との型閉めにより成形用空間部１２を形成し、該成形用空間部１２にゲート８から成形樹脂７を注入して（図１参照）、成形と同時に成形樹脂層１の表面に加飾シート３、裏面に転写シートを一体化形成させるものであって、型開き後に成形同時加飾成形品１０をＡ金型５に保持させることを特徴とする（図２参照）。   Hereinafter, the invention of the method for producing a molded simultaneous decorative molded product of the first aspect of the present invention will be described with reference to the drawings. In the manufacturing method of the simultaneously decorated decorative molded product 10 of the present invention, the transfer sheet 2 is arranged in the A mold 5 and the decorative sheet 3 is arranged in the B mold 6, and then the A mold 5 and the B mold 6 are arranged. The molding space 12 is formed by closing the mold, and the molding resin 7 is injected from the gate 8 into the molding space 12 (see FIG. 1). 3. A transfer sheet is integrally formed on the back surface, and the molded simultaneous decorative molded product 10 is held in the A mold 5 after the mold is opened (see FIG. 2).

Ａ金型５は、従来と同様に方形状等に形成されるもので、その周端部にはＢ金型６と直接接触する基準面１３を備える。この基準面１３により囲まれた内側部分には、成形品の外形に適合した形状の凹部１４が形成されている（図７参照）。一方、Ｂ金型６は、Ａ金型５に対応した幅及び高さの方形状等に形成されるもので、Ａ金型５と直接接触する平面たる基準面１３を備える。この基準面１３により囲まれた内側部分には、成形品の外形に適合した形状の凹部１４が形成されている（図８参照）。   The A mold 5 is formed in a rectangular shape or the like as in the prior art, and includes a reference surface 13 that directly contacts the B mold 6 at the peripheral end thereof. A concave portion 14 having a shape suitable for the outer shape of the molded product is formed in the inner portion surrounded by the reference surface 13 (see FIG. 7). On the other hand, the B mold 6 is formed in a square shape having a width and a height corresponding to the A mold 5, and includes a reference surface 13 that is a flat surface that directly contacts the A mold 5. A concave portion 14 having a shape suitable for the outer shape of the molded product is formed in the inner portion surrounded by the reference surface 13 (see FIG. 8).

そして、転写シート２および加飾シート３を挟んで、Ａ金型５の基準面１３とＢ金型６の基準面１３とが相互に接するように重ね合わせた状態（図１参照）において、Ａ金型５の凹部１４（図７参照）にはＢ金型６の凹部１４（図８参照）が配置される。そして、転写シート２と加飾シート３の間に成形空間部１２が形成され、Ｂ金型６の凹部１４の一部はゲート８となり、成形樹脂７がこのゲート８を介して成形空間部１２に注入される（図１参照）。この成形空間部１２の高さ、幅及び厚みは、成形品の所定の高さ、幅及び厚みに相当する。   In a state where the transfer sheet 2 and the decorative sheet 3 are sandwiched between the reference surface 13 of the A mold 5 and the reference surface 13 of the B mold 6 so as to contact each other (see FIG. 1), A The recess 14 (see FIG. 8) of the B mold 6 is disposed in the recess 14 (see FIG. 7) of the mold 5. A molding space 12 is formed between the transfer sheet 2 and the decorative sheet 3, and a part of the concave portion 14 of the B mold 6 becomes a gate 8, and the molding resin 7 passes through the gate 8 to form the molding space 12. (See FIG. 1). The height, width, and thickness of the molding space 12 correspond to the predetermined height, width, and thickness of the molded product.

そして、成形空間部１２内に成形樹脂７が注入され固化されれば、成形樹脂層１と転写シート２および加飾シート３とが接着し一体化する。その後、Ａ金型５とＢ金型６とを開けば、加飾シート３のＢ金型６からの離型重さが転写シート２の転写層２０の離型重さよりも低いので、Ｂ金型６から加飾シート３が離れて、成形樹脂層１の表面に加飾シート３および裏面に転写シート２が接着一体化された成形同時加飾成形品１０がＡ金型５に保持される（図２参照）。   When the molding resin 7 is injected into the molding space 12 and solidified, the molding resin layer 1, the transfer sheet 2, and the decorative sheet 3 are bonded and integrated. Thereafter, if the A mold 5 and the B mold 6 are opened, the mold release weight of the decorative sheet 3 from the B mold 6 is lower than the mold release weight of the transfer layer 20 of the transfer sheet 2. The decorative sheet 3 is separated from the mold 6, and a simultaneous molding decorative molded product 10 in which the decorative sheet 3 is bonded to the front surface of the molded resin layer 1 and the transfer sheet 2 is integrated on the back surface is held by the A mold 5. (See FIG. 2).

その後、射出成形金型のＡ金型５に付設されたエジェクタピン４（図７参照）が成形同時加飾成形品１０を突き出すことにより、転写シート２の基体シート２１から転写層２０が離れて、成形樹脂層１の表面に加飾シート３、裏面に転写層２０が接着一体化された成形同時両面加飾成形品１１が得られる（図３、図４参照）。この成形同時両面加飾成形品１１は表面が加飾シート３で覆われているため、従来の成形同時両面転写成形品よりも耐性に優れる効果がある。   Thereafter, the ejector pin 4 (see FIG. 7) attached to the A mold 5 of the injection mold protrudes the simultaneously decorated decorative molded product 10, thereby separating the transfer layer 20 from the base sheet 21 of the transfer sheet 2. Then, a simultaneous molding double-sided decorative molded article 11 in which the decorative sheet 3 is bonded to the front surface of the molded resin layer 1 and the transfer layer 20 is bonded and integrated to the back surface is obtained (see FIGS. 3 and 4). Since the surface of this simultaneous molding double-sided decorative molded product 11 is covered with the decorative sheet 3, it has an effect of being superior to the conventional simultaneous molding double-sided transfer molded product.

そして、エジェクタピン４によって射出成形金型のＡ金型５から脱離した成形同時両面加飾成形品１１は、回収装置１５によって金型から取り出される（図３参照）。回収方法としては、吸引による吸い付きの方法のほか、挟んで捕まえる方法などがある。なお、エジェクタピン４は、油圧などの圧力によって駆動する。   Then, the molding simultaneous double-sided decorative molded product 11 detached from the A mold 5 of the injection mold by the ejector pins 4 is taken out from the mold by the recovery device 15 (see FIG. 3). As a recovery method, there are a suction method by suction and a method of catching by pinching. The ejector pin 4 is driven by pressure such as hydraulic pressure.

つぎに、本発明に使用する転写シート２および加飾シート３を説明する。   Next, the transfer sheet 2 and the decorative sheet 3 used in the present invention will be described.

転写シート２は、基体シート２１上に成形後剥離可能な転写層２０が形成されるシートである。転写層２０の一例としては剥離層２２、図柄層２３、接着層２４が順次積層されたものがある（図５参照）。転写シート２と成形樹脂層１とが接着した後は、基体シート２１が剥離除去され転写層２０が成形樹脂層１上に形成される。   The transfer sheet 2 is a sheet on which a transfer layer 20 that can be peeled off after being formed is formed on a base sheet 21. As an example of the transfer layer 20, there is a layer in which a release layer 22, a design layer 23, and an adhesive layer 24 are sequentially laminated (see FIG. 5). After the transfer sheet 2 and the molded resin layer 1 are bonded, the base sheet 21 is peeled and removed, and the transfer layer 20 is formed on the molded resin layer 1.

なお、転写シート２の基体シート２１上には、剥離層２２との離型を調整するための離型層２５を形成しておいてもよい。また、転写シート２の図柄層２３が剥離性を有する場合は剥離層２２を、図柄層２３が接着性を有する場合は接着層２４を、それぞれ省略してもよい。また、剥離層２２と図柄層２３または 図柄層２３と接着層２４との間に密着を良くするためのアンカー層２６を形成しておいてもよい。   Note that a release layer 25 for adjusting the release from the release layer 22 may be formed on the base sheet 21 of the transfer sheet 2. Further, when the design layer 23 of the transfer sheet 2 has peelability, the release layer 22 may be omitted, and when the design layer 23 has adhesiveness, the adhesive layer 24 may be omitted. Also, an anchor layer 26 may be formed between the release layer 22 and the design layer 23 or between the design layer 23 and the adhesive layer 24 to improve the adhesion.

加飾シート３は、基体シート３０上に剥離しない加飾層が形成されるシートである。加飾層の一例としては図柄層３３、接着層３４が順次積層されたものがある（図６参照）。加飾シート３と成形樹脂層１とが接着一体化することにより、成形同時加飾成形品１０が形成される。   The decorative sheet 3 is a sheet on which a decorative layer that does not peel off is formed on the base sheet 30. As an example of the decorative layer, there is one in which a design layer 33 and an adhesive layer 34 are sequentially laminated (see FIG. 6). When the decorative sheet 3 and the molded resin layer 1 are bonded and integrated, a simultaneously molded decorative molded product 10 is formed.

なお、加飾シート３の基体シート３０には図柄層３３、接着層３４との密着を良くするためのアンカー層３５を形成しておいてもよい。また、図柄層４０と接着層３４との間にも、密着を良くするためのアンカー層３５を形成しておいてもよい。また、図柄層４０が接着性を有する場合は接着層３４を省略してもよい。   Note that an anchor layer 35 may be formed on the base sheet 30 of the decorative sheet 3 in order to improve the close contact with the design layer 33 and the adhesive layer 34. Further, an anchor layer 35 for improving adhesion may be formed between the design layer 40 and the adhesive layer 34. Further, when the design layer 40 has adhesiveness, the adhesive layer 34 may be omitted.

基体シート２１，３０の材質は、ポリエステル系樹脂、塩化ビニル系樹脂、アクリル系樹脂、ポリカーボネート系樹脂、ポリプロピレン系樹脂、ポリエチレン系樹脂、ポリウレタン系樹脂、ポリスチレン系樹脂、アセテート系樹脂、ポリアミド系樹脂などが好ましい。   The material of the base sheets 21 and 30 is polyester resin, vinyl chloride resin, acrylic resin, polycarbonate resin, polypropylene resin, polyethylene resin, polyurethane resin, polystyrene resin, acetate resin, polyamide resin, etc. Is preferred.

基体シート２１，３０の膜厚は５μｍ〜５ｍｍが好ましい。膜厚が５μｍより薄いと、シートに剛性がなく皺が入りやすいという問題があり、５ｍｍより厚いと、剛性がありすぎて取り扱いにくいという問題があるためである。   The film thickness of the base sheets 21 and 30 is preferably 5 μm to 5 mm. This is because if the film thickness is less than 5 μm, there is a problem that the sheet is not rigid and easily wrinkled, and if it is thicker than 5 mm, the sheet is too rigid and difficult to handle.

基体シート２１，３０の形成方法は、押出成形、カレンダー成形、キャストなどの汎用の製膜方法で構わない。なお、基体シート１は、必要に応じて印刷層を形成する側の表面に予めコロナ放電処理、プラズマ処理、易接着プライマーコート処理等の易接着処理を施しておいてもよい。   The formation method of the base sheets 21 and 30 may be a general film forming method such as extrusion molding, calendar molding, or casting. In addition, the base sheet 1 may be subjected to easy adhesion treatment such as corona discharge treatment, plasma treatment, and easy adhesion primer coating on the surface on the side on which the printed layer is formed, if necessary.

離型層２５の材質は、メラミン系樹脂、シリコン系樹脂、フッ素系樹脂、アルキッド系樹脂、フェノール系樹脂を挙げることができ、剥離層からの離型性に応じて、適宜、好ましい材料を選択する。   Examples of the material of the release layer 25 include melamine resin, silicon resin, fluorine resin, alkyd resin, and phenol resin, and a preferable material is appropriately selected according to the release property from the release layer. To do.

離型層２５の膜厚は０．５μｍ〜５０μｍが好ましい。膜厚が０．５μｍより薄いと、十分な離型性が得られないという問題があり、５０μｍより厚いと、印刷後に乾燥し難いという問題があるためである。   The film thickness of the release layer 25 is preferably 0.5 μm to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient releasability cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing.

離型層２５の形成方法は、グラビア印刷、オフセット印刷、スクリーン印刷などの方法でも、塗装、ディッピング、リバースコーターなどの方法でもよい。   The method for forming the release layer 25 may be a method such as gravure printing, offset printing, or screen printing, or a method such as painting, dipping, or reverse coater.

剥離層２２の材質としては、アクリル系樹脂、ビニル系樹脂、ウレタン系樹脂、ポリエステル系樹脂、ポリプロピレン系樹脂、ポリエチレン系樹脂、ポリスチレン系樹脂、ポリカーボネート系樹脂、ビニロン系樹脂、アセテート系樹脂、ポリアミド系樹脂を挙げることができ、離型層からの剥離性に応じて、適宜、好ましい材料を選択する。   The release layer 22 is made of acrylic resin, vinyl resin, urethane resin, polyester resin, polypropylene resin, polyethylene resin, polystyrene resin, polycarbonate resin, vinylon resin, acetate resin, polyamide resin. Resin can be mentioned, A preferable material is suitably selected according to the peelability from a release layer.

剥離層２２の膜厚は０．５μｍ〜５０μｍが好ましい。膜厚が０．５μｍより薄いと、十分な剥離性が得られないという問題があり、５０μｍより厚いと、印刷後に乾燥し難いという問題があるためである。   The thickness of the release layer 22 is preferably 0.5 μm to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient peelability cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing.

剥離層２２の形成方法は、グラビア印刷、オフセット印刷、スクリーン印刷などの方法でも、塗装、ディッピング、リバースコーターなどの方法でもよい。   The method for forming the release layer 22 may be a method such as gravure printing, offset printing, or screen printing, or a method such as painting, dipping, or reverse coater.

図柄層２３、３３は木目柄、石目柄、布目柄、文字、幾何学模様、ベタパターン等の加飾したい絵柄を形成した層である。なお、図柄層２３、３３は並列して複数形成してもよい。また、図柄層２３、３３には、必要に応じて金属膜層を設けてもよい。この場合、金属膜層は全面でもパターン状でもよい。   The pattern layers 23 and 33 are layers on which a pattern to be decorated such as a wood grain pattern, a stone pattern, a cloth pattern, a character, a geometric pattern, a solid pattern and the like is formed. A plurality of design layers 23 and 33 may be formed in parallel. Moreover, you may provide a metal film layer in the symbol layers 23 and 33 as needed. In this case, the metal film layer may be entirely or patterned.

図柄層２３、３３の材質は、ポリエステル系樹脂、アクリル系樹脂、ビニル系樹脂、硝化綿系樹脂、ウレタン系樹脂、塩化ゴム系樹脂などを挙げることができるが、特に限定されない。また、金属膜層の場合には、アルミニウム、クロム、銅、ニッケル、インジウム、錫、酸化珪素などを挙げることができるが、特に限定されない。。   Examples of the material for the pattern layers 23 and 33 include, but are not particularly limited to, polyester resins, acrylic resins, vinyl resins, nitrified cotton resins, urethane resins, and chlorinated rubber resins. In the case of a metal film layer, aluminum, chromium, copper, nickel, indium, tin, silicon oxide, and the like can be given, but there is no particular limitation. .

図柄層２３、３３の膜厚は０．５μｍ〜５０μｍが好ましい。膜厚が０．５μｍより薄いと、十分な意匠性が得られないという問題があり、５０μｍより厚いと、印刷後に乾燥し難いという問題があるためである。ただし、金属膜層の場合は１５０Å〜１２００Åが好ましい。膜厚が１５０Åより薄いと、十分な意匠性が得られないという問題があり、１２００Åより厚いと、クラックが生じやすいという問題があるためである。   The film thickness of the pattern layers 23 and 33 is preferably 0.5 μm to 50 μm. When the film thickness is less than 0.5 μm, there is a problem that sufficient designability cannot be obtained, and when it is more than 50 μm, there is a problem that it is difficult to dry after printing. However, in the case of a metal film layer, 150 to 1200 mm is preferable. If the film thickness is less than 150 mm, there is a problem that sufficient designability cannot be obtained, and if it is more than 1200 mm, there is a problem that cracks are likely to occur.

図柄層２３、３３の形成方法は、グラビア印刷、オフセット印刷、スクリーン印刷などの方法でも、塗装、ディッピング、リバースコーターなどの方法でもよい。金属膜層の場合には、真空蒸着やメッキ等の方法がある。   The pattern layers 23 and 33 may be formed by gravure printing, offset printing or screen printing, or by coating, dipping, reverse coater or the like. In the case of a metal film layer, there are methods such as vacuum deposition and plating.

接着層２４、３４の材質としては、アクリル系樹脂、ビニル系樹脂、ウレタン系樹脂、ポリエステル系樹脂、ポリプロピレン系樹脂、ポリエチレン系樹脂、ポリスチレン系樹脂、ポリカーボネート系樹脂、ビニロン系樹脂、アセテート系樹脂、ポリアミド系樹脂を挙げることができ、成形樹脂との接着性に応じて、適宜、好ましい材料を選択する。   The materials of the adhesive layers 24 and 34 are acrylic resin, vinyl resin, urethane resin, polyester resin, polypropylene resin, polyethylene resin, polystyrene resin, polycarbonate resin, vinylon resin, acetate resin, A polyamide-based resin can be used, and a preferable material is appropriately selected according to the adhesiveness to the molding resin.

接着層２４、３４の膜厚は０．５μｍ〜１０μｍが好ましい。膜厚が０．５μｍより薄いと、十分な密着が得られないという問題があり、１０μｍより厚いと、印刷後に乾燥し難いという問題があるためである。   The film thickness of the adhesive layers 24 and 34 is preferably 0.5 μm to 10 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and if it is more than 10 μm, there is a problem that it is difficult to dry after printing.

接着層２４、３４の形成方法は、グラビア印刷、オフセット印刷、スクリーン印刷などの方法でも、塗装、ディッピング、リバースコーターなどの方法でもよい。   The method for forming the adhesive layers 24 and 34 may be a gravure printing, an offset printing, a screen printing or the like, or a coating, dipping, reverse coater or the like.

アンカー層２６、３５の材質としては、アクリル系樹脂、ビニル系樹脂、ウレタン系樹脂、ポリエステル系樹脂、ポリプロピレン系樹脂、ポリエチレン系樹脂、ポリスチレン系樹脂、ポリカーボネート系樹脂、ビニロン系樹脂、アセテート系樹脂、ポリアミド系樹脂を挙げることができ、成形樹脂との接着性に応じて、適宜、好ましい材料を選択する。   As the material of the anchor layers 26 and 35, acrylic resin, vinyl resin, urethane resin, polyester resin, polypropylene resin, polyethylene resin, polystyrene resin, polycarbonate resin, vinylon resin, acetate resin, A polyamide-based resin can be used, and a preferable material is appropriately selected according to the adhesiveness to the molding resin.

アンカー層２６、３５の膜厚は０．５μｍ〜１０μｍが好ましい。膜厚が０．５μｍより薄いと、十分な密着が得られないという問題があり、１０μｍより厚いと、印刷後に乾燥し難いという問題があるためである。   The film thickness of the anchor layers 26 and 35 is preferably 0.5 μm to 10 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and if it is more than 10 μm, there is a problem that it is difficult to dry after printing.

アンカー層２６、３５の形成方法は、グラビア印刷、オフセット印刷、スクリーン印刷などの方法でも、塗装、ディッピング、リバースコーターなどの方法でもよい。   The formation method of the anchor layers 26 and 35 may be a method such as gravure printing, offset printing or screen printing, or a method such as painting, dipping or reverse coater.

転写シート２の形態は、巻きロールなどの長尺状のものが好ましい。転写シート２をＢ金型６側のシート送り装置に固定し一定の張力に保持した方が、型開きにより転写シート２の基体シート２１と成形同時加飾成形品１０とが離れやすくなるためである。   The form of the transfer sheet 2 is preferably a long form such as a winding roll. If the transfer sheet 2 is fixed to the sheet feeding device on the B mold 6 side and held at a constant tension, the base sheet 21 of the transfer sheet 2 and the molded simultaneous decorative molded product 10 are more easily separated by mold opening. is there.

転写シート２の転写層の離型重さは、１０〜５００ｇ重／ｃｍが好ましい。１０ｇ重／ｃｍ未満であると成形樹脂の流動する圧力で転写層が動いて所望の位置に形成することができなくなり（表１参照）、５００ｇ重／ｃｍを超えると転写層２０が離型しなくなるためである。   The release weight of the transfer layer of the transfer sheet 2 is preferably 10 to 500 g weight / cm. When the weight is less than 10 g weight / cm, the transfer layer cannot be formed at a desired position due to the pressure at which the molding resin flows (see Table 1). When the weight exceeds 500 g weight / cm, the transfer layer 20 is released. This is because it disappears.

転写シート２の転写層の離型重さを測定する方法は、幅１ｃｍの転写シート２を被転写板１７に貼り付けた後、被転写板１７の端部を片方のチャック１６で固定し、その後に転写シート２の基体シート２１を２ｃｍ剥がし、１８０°に折り曲げて基体シート２１を他方のチャック１６で固定して、環境温度２５℃下で引張って剥離強度を測定する方法である（図９参照）。   The method for measuring the release weight of the transfer layer of the transfer sheet 2 is that after the transfer sheet 2 having a width of 1 cm is attached to the transfer plate 17, the end of the transfer plate 17 is fixed with one chuck 16; Thereafter, the substrate sheet 21 of the transfer sheet 2 is peeled off by 2 cm, bent to 180 °, the substrate sheet 21 is fixed by the other chuck 16, and the peel strength is measured by pulling at an ambient temperature of 25 ° C (FIG. 9). reference).

加飾シート３の形態は、所定の寸法にカットされた枚葉状のものであってもよいし、巻きロールなどの長尺状のものであってもよい。   The form of the decorative sheet 3 may be a single sheet cut into a predetermined dimension, or may be a long sheet such as a wound roll.

加飾シート３のＢ金型からの離型重さは、１００ｇ重／ｃｍ未満が好ましい。１００ｇ重／ｃｍ以上であると型開きの際に成形同時加飾成形品１０が金型に引っかかって破損してしまう場合があるからである。   The mold release weight of the decorative sheet 3 from the B mold is preferably less than 100 g weight / cm. This is because if the weight is 100 g weight / cm or more, the simultaneous decorative and molded product 10 may be caught by the mold and damaged when the mold is opened.

そして、転写シート２の転写層の離型重さが加飾シート３のＢ金型からの離型重さの１．１倍以上であることが好ましい。転写シートの転写層の離型重さが加飾シートのＢ金型からの離型重さの１．１倍未満であると、Ｂ金型に成形同時加飾成形品１０が保持されてしまう場合があるからである（実施例１、表１参照）。   And it is preferable that the mold release weight of the transfer layer of the transfer sheet 2 is 1.1 times or more of the mold release weight of the decorative sheet 3 from the B mold. When the mold release weight of the transfer layer of the transfer sheet is less than 1.1 times the mold release weight of the decorative sheet from the B mold, the molded simultaneous decorative molded product 10 is held in the B mold. This is because there are cases (see Example 1, Table 1).

上記のようにする手段として、加飾シート２の加飾層と反対面に、加飾シート２が金型Ｂと離型しやすくなるための離型オーバーコート層３６を設ける方法がある。   As a means to make it above, there exists the method of providing the mold release overcoat layer 36 for making the decoration sheet 2 easy to release from the metal mold | die B on the opposite surface to the decoration layer of the decoration sheet 2. FIG.

離型オーバーコート層３６の材質としては、シリコン系樹脂、メラミン系樹脂、フッ素系樹脂などを挙げることができ、金型Ｂとの離型性に応じて、適宜、好ましい材料を選択する。   Examples of the material of the release overcoat layer 36 include silicon-based resin, melamine-based resin, fluorine-based resin, and the like, and a preferable material is appropriately selected according to the releasability from the mold B.

離型オーバーコート層３６を設ける方法は、グラビア印刷、オフセット印刷、スクリーン印刷などの方法でも、塗装、ディッピング、リバースコーターなどの方法でもよい。あるいは、離型オーバーコート層３６を予めフィルム化しておきラミネート法により形成してもよい。   The method for providing the release overcoat layer 36 may be a method such as gravure printing, offset printing, or screen printing, or a method such as painting, dipping, or reverse coater. Alternatively, the release overcoat layer 36 may be formed into a film in advance and formed by a laminating method.

なお、離型重さを測定する方法は、幅１ｃｍの加飾シート３をＢ金型の金型薄片板１８に貼り付けた後、金型薄片板１８の端部を片方のチャック１６で固定し、その後に基体シート２１を２ｃｍ剥がし、１８０°に折り曲げて他方のチャック１６で固定して、環境温度２５℃下で引張って剥離強度を測定する方法である（図１０参照）。   The mold release weight is measured by attaching the decorative sheet 3 having a width of 1 cm to the mold thin plate 18 of the B mold, and then fixing the end of the mold thin plate 18 with one chuck 16. Then, the base sheet 21 is peeled off by 2 cm, bent at 180 °, fixed with the other chuck 16, and pulled at an environmental temperature of 25 ° C. to measure the peel strength (see FIG. 10).

また、加飾シート３が金型Ｂと離型しやすいようにするために、Ｂ金型に型開きと同時に作動する第二エジェクタピン９を付設してもよい（図８参照）。   Moreover, in order to make it easy to release the decorative sheet 3 from the mold B, a second ejector pin 9 that operates simultaneously with the mold opening may be attached to the B mold (see FIG. 8).

第二エジェクタピン９の形状はとくに限定されないが、加飾シート３の表面を押圧するので傷つきを防止するために先端部分には微小のＲを設けるのが好ましい。付設位置は１本なら成形空間部１２の中央付近が好ましく、複数本なら各端部に均等割合で設けるのが好ましい。   Although the shape of the 2nd ejector pin 9 is not specifically limited, Since the surface of the decorating sheet 3 is pressed, in order to prevent damage, it is preferable to provide minute R at the front-end | tip part. If the number of attachment positions is one, the vicinity of the center of the molding space 12 is preferable.

厚み３８μmのポリエチレンテレフタレートフィルム（易接着処理）からなる基体シート上に様々な比率のメラミン樹脂とシリコン樹脂からなる離型層を形成し、次いでウレタン樹脂系の二液硬化型インキを用いて剥離層をグラビア印刷法により形成した。これを１２０℃で５分間熱処理後、真空蒸着法にて厚み６００±５０Åのアルミニウム金属膜からなる図柄層をパターン形成し、次いで塩化ビニル酢酸ビニル共重合体樹脂からなる接着層をグラビア印刷法により形成することにより、様々な離型重さの転写シートを用意した。   A release layer composed of melamine resin and silicon resin in various ratios is formed on a base sheet composed of a polyethylene terephthalate film (easy adhesion treatment) with a thickness of 38 μm, and then a release layer using urethane resin-based two-component curable ink Was formed by a gravure printing method. After heat treatment at 120 ° C. for 5 minutes, a pattern layer made of an aluminum metal film having a thickness of 600 ± 50 mm is formed by vacuum deposition, and then an adhesive layer made of vinyl chloride vinyl acetate copolymer resin is formed by gravure printing. By forming the sheet, transfer sheets having various release weights were prepared.

一方、厚み１２５μmのアクリルフィルムからなる基体シート上にアクリル樹脂と塩化ビニル樹脂が重量％１：１からなる木目柄の図柄層をパターン形成し、次いで塩化ビニル樹脂からなる接着層をグラビア印刷法により形成することにより加飾シートを用意した。加飾シートの離型重さは２０ｇ重／ｃｍであった。   On the other hand, on the base sheet made of an acrylic film having a thickness of 125 μm, a pattern layer of wood grain pattern made of acrylic resin and vinyl chloride resin having a weight percentage of 1: 1 is patterned, and then an adhesive layer made of vinyl chloride resin is formed by a gravure printing method. A decorative sheet was prepared by forming. The mold release weight of the decorative sheet was 20 g weight / cm.

用意した様々な離型重さの転写シートをエジェクタピンが付設された射出成形金型のＡ金型に配置し、加飾シートをＢ金型に配置した後、アクリロニトリルブタジエンスチレン共重合体樹脂からなる成形樹脂を注入し、冷却固化させて転写シートおよび加飾シートと成形樹脂とを一体化させた後、射出成形金型を開いたところ表１の結果が得られた。   After placing the prepared transfer sheet with various release weights in the A mold of the injection mold with the ejector pins attached, and arranging the decorative sheet in the B mold, from the acrylonitrile butadiene styrene copolymer resin After injecting a molding resin to be cooled and solidifying to integrate the transfer sheet, the decorative sheet and the molding resin, the injection mold was opened, and the results shown in Table 1 were obtained.

Figure 0004459585
※転写層の形成位置の可否は、転写層がほぼ所望の位置に形成されている場合には○、成形樹脂の流動する圧力で転写層が動いて所望の位置に形成することができない場合に×とする。
Figure 0004459585
 * Whether the transfer layer is formed or not can be determined as ○ when the transfer layer is almost at the desired position, or when the transfer layer cannot be formed at the desired position due to the pressure of the molding resin flowing. X.

そして、成形同時加飾成形品がＡ金型側に保持された場合には、Ａ金型のエジェクタピンによる突き出しで、転写シートから基体シートが剥がされ成形同時両面加飾成形品をが得ることができ、吸引装置の付いた回収装置によって連続的かつ安定的に成形同時両面加飾成形品を回収することが可能であった。   And, when the molding simultaneous decorative molded product is held on the A mold side, the base sheet is peeled off from the transfer sheet by the ejection of the A mold by the ejector pin to obtain the molding simultaneous double-sided decorative molded product It was possible to continuously and stably collect molded double-sided decorative molded articles continuously and stably by a collecting apparatus equipped with a suction device.

厚み３８μmのポリエチレンテレフタレートフィルム（易接着処理）からなる基体シート上にメラミン樹脂からなる離型層を形成し、次いでアクリル樹脂と塩化ビニル酢酸ビニル共重合体樹脂が重量％２：１からなる剥離層をグラビア印刷法により形成し、次いで塩化ビニル酢酸ビニル共重合体樹脂からなる図柄層をグラビア印刷法により形成した。転写シートの離型重さは２０ｇ重／ｃｍであった。   A release layer made of melamine resin is formed on a base sheet made of a polyethylene terephthalate film (easy adhesion treatment) having a thickness of 38 μm, and then a release layer made of acrylic resin and vinyl chloride vinyl acetate copolymer resin 2% by weight. Was formed by a gravure printing method, and then a pattern layer made of vinyl chloride vinyl acetate copolymer resin was formed by a gravure printing method. The release weight of the transfer sheet was 20 g weight / cm.

一方、厚み１２５μmのアクリルフィルムからなる基体シート上にアクリル樹脂と塩化ビニル樹脂が重量％１：１からなる木目柄の図柄層をパターン形成し、次いで塩化ビニル樹脂からなる接着層をグラビア印刷法により形成することにより加飾シートを用意した。加飾シートの離型重さは２０ｇ重／ｃｍであった。   On the other hand, on the base sheet made of an acrylic film having a thickness of 125 μm, a pattern layer of wood grain pattern made of acrylic resin and vinyl chloride resin having a weight percentage of 1: 1 is patterned, and then an adhesive layer made of vinyl chloride resin is formed by a gravure printing method. A decorative sheet was prepared by forming. The mold release weight of the decorative sheet was 20 g weight / cm.

用意した転写シートをエジェクタピンが付設された射出成形金型のＡ金型側に配置し、加飾シートを第二エジェクタピンが付設されたＢ金型に配置した後、アクリロニトリルスチレン共重合体樹脂からなる成形樹脂を注入し、冷却固化させて転写シートおよび加飾シートの転写層と成形樹脂とを一体化させた後、射出成形金型を開いたところ第二エジェクタピンの突き出しにより成形同時加飾成形品がＡ金型側に保持された。   The prepared transfer sheet is placed on the A mold side of the injection mold attached with the ejector pins, and the decorative sheet is placed on the B mold fitted with the second ejector pins, and then the acrylonitrile styrene copolymer resin. After injecting a molding resin consisting of, solidifying by cooling and integrating the transfer layer of the transfer sheet and the decorative sheet and the molding resin, the injection molding die was opened and molding was simultaneously applied by protruding the second ejector pin. The decorative molded product was held on the A mold side.

そして、Ａ金型のエジェクタピンによる突き出しで、転写シートから基体シートが剥がされ成形同時両面加飾成形品を得ることができ、吸引装置の付いた回収装置によって連続的かつ安定的に成形同時両面加飾成形品を回収することが可能であった。   The base sheet is peeled off from the transfer sheet by the ejection of the ejector pin of the mold A, and a simultaneous molding double-sided decorative molded product can be obtained. It was possible to collect the decorative molded product.

この発明によって得られた成形同時両面加飾成形品は、携帯通話機器の上蓋や下蓋、電子応用玩具の表面部品や外装部品、炊飯器入力部パネルや自動車内外装パネル、パチンコ台の外枠などに利用できる。   The molded simultaneous double-sided decorative molded product obtained by the present invention includes an upper cover and a lower cover of a portable telephone device, a surface part and an exterior part of an electronic application toy, a rice cooker input unit panel, an automobile interior / exterior panel, an outer frame of a pachinko machine It can be used for

図面は、何れも、本発明に係る成形同時加飾成形品の製造方法並びにこれらに用いる射出成形金型、転写シート、加飾シート、離型重さ測定装置およびこれらを用いて得られた成形同時両面加飾成形品の一実施例を示す。
Ａ金型とＢ金型との間に転写シートおよび加飾シートを挿入し、型締め後、成形樹脂を射出し、成形樹脂が成形空間部に充填される途中の状態を示す射出成形金型の断面図である。 型開後、成形同時加飾成形品がＡ金型に保持された状態を示す射出成形同時加飾用金型の断面図である。 回収装置が成形同時両面加飾成形品を回収する状態を示す射出成形同時加飾用金型の断面図である。 回収された成形同時両面加飾成形品の断面図である。 本発明に係る転写シートの断面図である。 本発明に係る加飾シートの断面図である。 射出成形金型のＡ金型の断面図である。 射出成形金型のＢ金型の断面図である。 転写シートの離型重さ測定装置の概略断面図である。 加飾シートの離型重さ測定装置の概略断面図である。 All the drawings show the method for producing a simultaneously molded decorative molded product according to the present invention, and an injection mold, a transfer sheet, a decorative sheet, a mold release weight measuring device used therefor, and a molding obtained using them. An example of a simultaneous double-sided decorative molded product is shown.
An injection mold that inserts a transfer sheet and a decorative sheet between the A mold and the B mold, injects a molding resin after clamping, and shows a state in the middle of filling the molding resin into the molding space FIG. It is sectional drawing of the metal mold | die for simultaneous injection-molding decoration which shows the state by which the molding simultaneous decoration molded product was hold | maintained to A mold after mold opening. It is sectional drawing of the metal mold | die for injection molding simultaneous decorating which shows the state in which a collection | recovery apparatus collects a molding simultaneous double-sided decorative molded product. It is sectional drawing of the collect | recovered simultaneous simultaneous double-sided decorative molded product. It is sectional drawing of the transfer sheet which concerns on this invention. It is sectional drawing of the decorating sheet which concerns on this invention. It is sectional drawing of A metal mold | die of an injection mold. It is sectional drawing of the B metal mold | die of an injection mold. It is a schematic sectional drawing of the mold release weight measuring apparatus of a transfer sheet. It is a schematic sectional drawing of the mold release weight measuring apparatus of a decorating sheet.

符号の説明Explanation of symbols

１ 成形樹脂層
２ 転写シート
３ 加飾シート
４ エジェクタピン
５ Ａ金型
６ Ｂ金型
７ 成形樹脂
８ ゲート
９ 第二エジェクタピン
１０ 成形同時加飾成形品
１１ 成形同時両面加飾成形品
１２ 成形空間部
１３ 基準面
１４ 凹部
１５ 回収装置
１６ チャック
１７ 被転写板
１８ 金型薄片板
２０ 転写層
２１、３０ 基体シート
２２ 剥離層
２３、３３ 図柄層
２４、３４ 接着層
２５ 離型層
２６、３５ アンカー層
３０ 加飾層
３６ 離型オーバーコート層 DESCRIPTION OF SYMBOLS 1 Molding resin layer 2 Transfer sheet 3 Decorating sheet 4 Ejector pin 5 A die 6 B die 7 Molding resin 8 Gate 9 Second ejector pin 10 Molding simultaneous decorating molded product 11 Molding simultaneous double sided decorating molded product 12 Molding space Part 13 Reference surface 14 Recess 15 Recovering device 16 Chuck 17 Transfer plate 18 Mold thin plate 20 Transfer layer 21, 30 Base sheet 22 Release layer 23, 33 Pattern layer 24, 34 Adhesive layer 25 Release layer 26, 35 Anchor layer 30 decoration layer 36 release overcoat layer

Claims (2)

基体シート上に転写層が設けられた転写シートをエジェクタピンが付設されている射出成形金型のＡ金型に配置し、加飾層が設けられた加飾シートを射出成形金型のＢ金型に配置した後、Ａ金型とＢ金型との型締めにより成形用空間部を形成し、その成形用空間部に成形樹脂を注入して射出成形品を形成すると同時に転写層及び加飾シートを一体化形成させる成形同時加飾成形品の製造方法であって、
加飾シートのＢ金型からの離型重さは、１００ｇ／ｃｍ未満に設定され、
転写層の基体シートからの離型重さは、加飾シートのＢ金型からの離型重さの１．１倍以上に設定され、
型開き後に成形同時加飾成形品がＡ金型に保持されるようにした、成形同時加飾成形品の製造方法。 A transfer sheet provided with a transfer layer on a base sheet is placed in an A mold of an injection mold provided with an ejector pin, and a decorative sheet provided with a decoration layer is used as a B mold of an injection mold. After being placed in the mold, a molding space is formed by clamping the A and B molds, and a molding resin is injected into the molding space to form an injection-molded product, and at the same time, a transfer layer and a decoration A method of manufacturing a simultaneously molded decorative molded product that integrally forms a sheet ,
Releasing the weight of the B mold decorating sheet is set to less than 100 g / cm,
The release weight from the base sheet of the transfer layer is set to 1.1 times or more the release weight from the B mold of the decorative sheet,
A method for producing a simultaneously molded decorative molded product, wherein the molded simultaneous decorative molded product is held in the A mold after the mold is opened. Ｂ金型は、型開きと同時に作動する第二エジェクタピンを更に備えた、請求項１記載の成形同時加飾成形品の製造方法。   The method for producing a molded simultaneous decorative molded product according to claim 1, wherein the B mold further includes a second ejector pin that operates simultaneously with mold opening.
JP2003341692A 2003-09-30 2003-09-30 Manufacturing method for simultaneously molded decorative molded products Expired - Fee Related JP4459585B2 (en)

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