JPH04270617A - In-mold decorative molding method - Google Patents
In-mold decorative molding methodInfo
- Publication number
- JPH04270617A JPH04270617A JP3286991A JP3286991A JPH04270617A JP H04270617 A JPH04270617 A JP H04270617A JP 3286991 A JP3286991 A JP 3286991A JP 3286991 A JP3286991 A JP 3286991A JP H04270617 A JPH04270617 A JP H04270617A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- release film
- molding
- molded product
- coating
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 27
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 14
- 239000012778 molding material Substances 0.000 claims abstract description 11
- 239000011247 coating layer Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims 1
- 238000005034 decoration Methods 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- -1 curing accelerators Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000004412 Bulk moulding compound Substances 0.000 description 3
- 239000003677 Sheet moulding compound Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000000754 repressing effect Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、型内被覆成形法を利用
して加飾が施されたプラスチック成形品を得る型内加飾
成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-mold decorative molding method for producing decorated plastic molded products using an in-mold coating molding method.
【０００２】0002
【従来の技術】従来より、熱硬化性成形材料よりなる成
形品として、シートモールディングコンパウンド（ＳＭ
Ｃ）またはバルクモールディングコンパウンド（ＢＭＣ
）を用いたものがよく知られている。しかしながら、Ｓ
ＭＣまたはＢＭＣを成形型内で加熱・加圧により成形し
た得られた成形品では、表面に気孔、微小亀裂、ひけま
たは起伏等の表面欠陥が生じがちであった。このような
表面欠陥が生じている場合、成形品に通常の方法により
塗膜等の被覆層を形成しても、満足し得る被覆層を設け
ることは難しい。[Prior Art] Conventionally, sheet molding compounds (SM
C) or bulk molding compound (BMC)
) is well known. However, S
Molded articles obtained by molding MC or BMC in a mold by heating and pressurizing tend to have surface defects such as pores, microcracks, sink marks, or undulations on the surface. When such surface defects occur, it is difficult to provide a satisfactory coating layer even if a coating layer such as a coating film is formed on the molded article by a conventional method.
【０００３】そこで、上記のような表面欠陥を隠蔽する
ための方法として、いわゆる型内被覆成形法が提案され
ている。例えば、特開昭５３−７１１６７号には、成形
型内で加熱・加圧し、ＳＭＣを半硬化させた後、成形型
を開き被覆材料を注入することにより成形品表面に被覆
層を設ける方法が開示されている。また、特開昭６１−
２７３９２１号は、圧縮成形中に、その成形圧力を超え
る注入圧で被覆材料を注入して硬化させ、それによって
成形品に被覆層を形成する方法が開示されている。[0003] Therefore, a so-called in-mold coating method has been proposed as a method for concealing the above-mentioned surface defects. For example, JP-A-53-71167 discloses a method of semi-curing SMC by heating and pressurizing it in a mold, and then opening the mold and injecting a coating material to form a coating layer on the surface of the molded product. Disclosed. Also, JP-A-61-
No. 273,921 discloses a method of injecting and curing a coating material during compression molding at an injection pressure exceeding the molding pressure, thereby forming a coating layer on a molded article.
【０００４】0004
【発明が解決しようとする課題】上記のような型内被覆
成形法では、熱硬化性成形材料よりなる成形品の片側表
面全体に被覆材料を被覆することが可能である。しかし
ながら、用途によっては部分的に被覆層を設けた成形品
が求められることがあったが、上記型内被覆成形法では
このような成形品を提供することはできなかった。すな
わち、従来の型内被覆成形法は、加飾という観点からは
、かなり自由度が小さい方法にすぎなかった。In the above-described in-mold coating molding method, it is possible to coat the entire surface of one side of a molded article made of a thermosetting molding material with the coating material. However, depending on the application, a molded article partially provided with a coating layer was required, but such a molded article could not be provided by the above-mentioned in-mold coating molding method. In other words, the conventional in-mold coating molding method is only a method with a considerably small degree of freedom from the viewpoint of decoration.
【０００５】よって、本発明の目的は、型内被覆成形法
を利用し、さらに部分的な着色や加飾等を可能とする方
法を提供することにある。[0005] Accordingly, an object of the present invention is to provide a method that utilizes an in-mold coating molding method and further enables partial coloring, decoration, etc.
【０００６】[0006]
【課題を解決するための手段】本発明は、熱硬化性成形
材料を型内で加熱・加圧成形するに際し、該熱硬化性成
形材料が半硬化または硬化したときに被覆材料を注入し
て成形する方法において、上記被覆材料の注入に先だち
成形品基材を部分的に覆うように離型フィルムを投入し
、離型フィルム投入後に被覆材料を注入して加圧成形し
、しかる後離型フィルムを除去することを特徴とする型
内加飾成形方法である。[Means for Solving the Problems] The present invention involves injecting a coating material when the thermosetting molding material is semi-cured or hardened when the thermosetting molding material is heated and pressure molded in a mold. In the molding method, prior to injecting the above-mentioned coating material, a release film is introduced so as to partially cover the base material of the molded product, and after the release film is introduced, the coating material is injected and pressure molded, and then the mold is released. This is an in-mold decorative molding method characterized by removing the film.
【０００７】本発明において用いられる熱硬化性成形材
料としては、従来より型内被覆成形法において用いられ
ている熱硬化性樹脂、例えば不飽和ポリエステル樹脂、
ビニルエステル樹脂、ウレタンアクリレート樹脂等を主
成分とし、これに無機充填材及びガラス繊維強化材を副
成分として含有するものが用いられる。また、必要に応
じて、添加剤として離型剤、増粘剤、低収縮剤または顔
料等が含有されていてもよい。The thermosetting molding materials used in the present invention include thermosetting resins conventionally used in in-mold coating molding methods, such as unsaturated polyester resins,
The main component used is a vinyl ester resin, a urethane acrylate resin, etc., and an inorganic filler and a glass fiber reinforcing material as subcomponents. Furthermore, if necessary, additives such as a mold release agent, a thickener, a low shrinkage agent, or a pigment may be contained.
【０００８】また、被覆材料としても、型内被覆成形法
において用いられている熱硬化性樹脂、例えば不飽和ポ
リエステル樹脂、ビニルエステル樹脂またはウレタンア
クリレート樹脂等を主成分とするものが適宜用いられる
。被覆材料においても、必要に応じ、充填剤、重合開始
剤、硬化促進剤、禁止剤、顔料・染料、低収縮剤及び離
型剤等の添加剤が含有されていてもよい。[0008] As the coating material, thermosetting resins used in the in-mold coating method, such as those whose main component is unsaturated polyester resin, vinyl ester resin, or urethane acrylate resin, can be used as appropriate. The coating material may also contain additives such as fillers, polymerization initiators, curing accelerators, inhibitors, pigments/dyes, low shrinkage agents, and mold release agents, as required.
【０００９】なお、上記熱硬化性成形材料または被覆材
料に使用される熱硬化性樹脂は、それぞれ、単独で用い
られてもよく、或いは複数種混合して用いられてもよい
。さらに、本発明において用いられる離型フィルムとし
ては、４フッ化ポリエチレン等のフッ素樹脂、ポリエチ
レンテレフタレート等のポリエステル樹脂、シリコーン
樹脂またはポリプロピレン等のオレフィン樹脂のような
合成樹脂や離型処理を施した紙等、種々の材料からなる
ものを用いることができる。もっとも、使用する離型フ
ィルムとしては、成形温度に耐えうるだけの耐熱性を有
するものが望ましく、また厚みについても、成形品の表
面状態を好ましくするためには５００μｍ以下、好まし
くは１００μｍ以下のものであることが望ましい。厚み
が５００μｍを超える離型フィルムを用いた場合には、
加飾部と非加飾部との間にかなりの高さの段差が生じ、
外観性状が低下するからである。The thermosetting resins used in the thermosetting molding material or coating material may be used alone or in combination. Further, as the release film used in the present invention, fluororesins such as polytetrafluoroethylene, polyester resins such as polyethylene terephthalate, synthetic resins such as silicone resins or olefin resins such as polypropylene, and paper subjected to release treatment are used. Those made of various materials can be used. However, it is desirable that the release film used be heat resistant enough to withstand the molding temperature, and the thickness should be 500 μm or less, preferably 100 μm or less in order to obtain a favorable surface condition of the molded product. It is desirable that When using a release film with a thickness exceeding 500 μm,
There is a considerable height difference between the decorated part and the non-decorated part,
This is because the appearance properties deteriorate.
【００１０】上記離型フィルムは、被覆材料の注入前に
成形型内に投入される。この場合、成形品基材を部分的
に覆う大きさの離型フィルムが投入されるが、この離型
フィルムの大きさ及び形状を選択することにより、後工
程で注入される被覆材料により構成される被覆層形成部
分の大きさ及び平面形状を調整することができる。すな
わち、成形品の表面の一部に離型フィルムを配置し、被
覆材料を注入し成形した後に離型フィルムを除去するこ
とにより、部分的に加飾が施された成形品を得ることが
できる。[0010] The release film is placed into a mold before the coating material is injected. In this case, a mold release film of a size that partially covers the molded product base material is introduced, but by selecting the size and shape of this mold release film, it can be made up of the coating material injected in a later process. The size and planar shape of the coating layer forming portion can be adjusted. That is, by placing a release film on a part of the surface of the molded product, injecting the coating material and removing the molding film after molding, a partially decorated molded product can be obtained. .
【００１１】[0011]
【作用】本発明では、離型フィルム投入後に被覆材料が
注入され、成形後に離型フィルムを除去することにより
、離型フィルムが設けられている部分に被覆層を形成し
ないでおくことができる。従って、上記離型フィルムの
剥離作業を施すだけで、被覆層を部分的に有しない、す
なわち部分的な加飾が施された成形品を得ることができ
る。[Operation] In the present invention, the coating material is injected after the mold release film is introduced, and the mold release film is removed after molding, so that the coating layer can not be formed on the part where the mold release film is provided. Therefore, by simply peeling off the release film, it is possible to obtain a molded product that is partially free of the coating layer, that is, that is partially decorated.
【００１２】0012
【実施例の説明】以下、本発明の非限定的な実施例を説
明することにより、本発明を明らかにする。
実施例
本発明の実施例に従って図１に示す成形品を得た。図１
において、１は加飾が部分的に施された成形品を示し、
２は部分的に施された加飾を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be explained by describing non-limiting examples thereof. EXAMPLE A molded article shown in FIG. 1 was obtained according to an example of the present invention. Figure 1
In, 1 indicates a molded product partially decorated,
2 shows partially applied decoration.
【００１３】この成形品の寸法は、底面が３００×３０
０ｍｍ、高さが３０ｍｍ及び厚みが３ｍｍである。上型
及び下型を有する成形型を、３００ｔプレスにセットし
、電気ヒータで加温することにより、上型を１５０℃、
下型を１４５℃に設定し、成形を行った。まず、成形型
内に、ＳＭＣ（ポリマールマット６８９−３５０ＷＢＲ
，武田薬品工業社製）を約６５０ｇチャージし、プレス
圧１００ｋｇ／ｃｍ２ で７０秒間加圧成形した後、上
型と下型との間を開き、フッ素樹脂系離型フィルム（テ
ドラーフィルム、５０ｍｍ×５０ｍｍ×厚み約３０μｍ
）を被覆層を設けない部分に投入した。次に、プレス圧
を３０ｋｇ／ｃｍ２ とし、約１０秒間再加圧した後、
下記の被覆材料を上型の中央部から市販の注入機を用い
１３ｍｌ注入し、次にプレス圧８０ｋｇ／ｃｍ２に昇圧
し、１２０秒間加熱・加圧して被覆材料で被覆された成
形品を得た。得られた成形品を成形型より取り出した後
、離型フィルムを剥離することにより、部分的に加飾が
施された成形品（図１参照）を得ることができた。[0013] The dimensions of this molded product are 300 x 30 on the bottom.
The height is 30 mm, and the thickness is 3 mm. A mold having an upper mold and a lower mold is set in a 300t press, and heated with an electric heater to heat the upper mold to 150°C.
Molding was performed with the lower mold set at 145°C. First, in the mold, place SMC (polymer mat 689-350WBR)
After charging about 650 g of fluorine resin release film (Tedlar film, 50 mm ×50mm×thickness approx. 30μm
) was added to the area where no coating layer was provided. Next, the press pressure was set to 30 kg/cm2, and after repressing for about 10 seconds,
13 ml of the following coating material was injected from the center of the upper mold using a commercially available injection machine, then the press pressure was increased to 80 kg/cm2, and heated and pressurized for 120 seconds to obtain a molded product coated with the coating material. . After the obtained molded product was taken out of the mold, the release film was peeled off to obtain a partially decorated molded product (see FIG. 1).
【００１４】被覆材料の組成
ポリエステル樹脂（ポリマール６６１９，武田薬品工業
社製）…１００重量部。
炭酸カルシウム…５０重量部。
硬化剤（ｔ−ブチルパーオキシベンゾエート）…１重量
部。Composition of coating material Polyester resin (Polymer 6619, manufactured by Takeda Pharmaceutical Co., Ltd.)...100 parts by weight. Calcium carbonate...50 parts by weight. Curing agent (t-butyl peroxybenzoate)...1 part by weight.
【００１５】顔料（Ｔｏｎｅｒ５１８ ＢＬＵ−Ｂ，
東洋インキ製造社製）…１４重量部。上記の組成の被覆
材料用組成物を十分に攪拌・混合することにより被覆材
料を得た。上記のようにして得られた成形品では、離型
フィルムの剥がされた部分に被覆層が設けられておらず
、従って部分的に加飾が施された成形品を得ることがで
きた。なお、被覆層が設けられている部分の外観性状は
良好であり、亀裂またはひけ等の表面欠陥は認められな
かった。Pigment (Toner518 BLU-B,
(manufactured by Toyo Ink Manufacturing Co., Ltd.)...14 parts by weight. A coating material was obtained by thoroughly stirring and mixing the coating material composition having the above composition. In the molded product obtained as described above, no coating layer was provided on the part where the release film was peeled off, and therefore a molded product partially decorated could be obtained. The appearance of the portion provided with the coating layer was good, and no surface defects such as cracks or sink marks were observed.
【００１６】[0016]
【発明の効果】以上のように、本発明によれば、成形型
内で熱硬化性成形材料が半硬化または硬化した段階で、
まず離型フィルムを投入し、しかる後被覆材料を注入し
て成形し、最後に離型フィルムを除去するものであるた
め、部分的に加飾が施された成形品を得ることができる
。すなわち、従来の型内被覆成形法では得られなかった
、成形品表面に部分的に加飾が施され、しかも成形品基
材と強固に密着された加飾層を有する成形品を本発明に
より提供することが可能となる。As described above, according to the present invention, when the thermosetting molding material is semi-hardened or hardened in the mold,
First, a release film is put in, then a covering material is injected and molded, and finally the release film is removed, so it is possible to obtain a partially decorated molded product. In other words, the present invention can produce a molded product that has a decorative layer that is partially decorated on the surface of the molded product and that is firmly attached to the base material of the molded product, which could not be obtained by conventional in-mold coating molding methods. It becomes possible to provide
【００１７】従って、本発明の型内加飾成形方法では、
使用する離型フィルムの平面形状を工夫することにより
、種々の模様の加飾が施された成形品を提供することが
可能となる。Therefore, in the in-mold decorative molding method of the present invention,
By devising the planar shape of the release film used, it is possible to provide molded products decorated with various patterns.
【図１】実施例で得られた成形品を略図的に示す断面図
である。FIG. 1 is a cross-sectional view schematically showing a molded article obtained in an example.
１ … 成形品 ２ … 加飾 1… Molded product 2…Decoration
Claims (1)
成形するに際し、前記熱硬化性成形材料が半硬化または
硬化したときに、型内に被覆材料を注入して被覆層を形
成する成形方法において、前記被覆材料の注入に先立っ
て成形品基材表面を部分的に覆うように離型フィルムを
投入し、該離型フィルム投入後に被覆材料を注入し、加
圧成形後に前記離型フィルムを除去することを特徴とす
る型内加飾成形方法。Claim 1: When heating and pressurizing a thermosetting molding material in a mold, when the thermosetting molding material is semi-cured or hardened, a coating material is injected into the mold to form a coating layer. In the molding method, a release film is introduced so as to partially cover the surface of the molded article substrate prior to the injection of the coating material, the coating material is injected after the injection of the release film, and the release film is injected after pressure molding. An in-mold decorative molding method characterized by removing a mold film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3286991A JPH04270617A (en) | 1991-02-27 | 1991-02-27 | In-mold decorative molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3286991A JPH04270617A (en) | 1991-02-27 | 1991-02-27 | In-mold decorative molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04270617A true JPH04270617A (en) | 1992-09-28 |
Family
ID=12370872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3286991A Pending JPH04270617A (en) | 1991-02-27 | 1991-02-27 | In-mold decorative molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04270617A (en) |
-
1991
- 1991-02-27 JP JP3286991A patent/JPH04270617A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7048880B2 (en) | Method of forming a composite article with a textured surface | |
| EP0064396B1 (en) | A method of producing shaped resinous articles and casting moulds for use in the method | |
| US4098856A (en) | Method of making a composite mold for making polyurethane foam decorative parts | |
| KR101294422B1 (en) | Method for protecing surface using decoration sheet | |
| JPH04270617A (en) | In-mold decorative molding method | |
| JPS5842011B2 (en) | Method for manufacturing cosmetic molded products | |
| JPH0716850A (en) | Production of artificial stone decorative panel | |
| JPH0911262A (en) | Manufacture of decorative molding | |
| JPH04270618A (en) | In-mold coating molding method | |
| JPS6030243B2 (en) | Manufacturing method for plastic concrete decorative materials | |
| JP2008055629A (en) | Manufacturing method of frp molded product and bathtub | |
| JPS6241472B2 (en) | ||
| JP2002212448A (en) | Polarizing resin molding and its manufacturing method | |
| JPH05318468A (en) | Gelcoat sheet for molding and preparation thereof and preparation of molding with gelcoat layer using said gelcoat sheet for molding | |
| JP2002192542A (en) | Method for manufacturing frp moldings | |
| EP4186697A1 (en) | Method for the manufacture and decoration of a mineral-filled resin shower tray with an external coating, and shower tray obtained by said method | |
| JPH04265717A (en) | In-mold coating molding method | |
| JP3732425B2 (en) | FRP molded body molding method | |
| JPH1015969A (en) | Production of decorative molded product | |
| JPH05318694A (en) | Decorative sheet | |
| JP3374883B2 (en) | Method for manufacturing FRP molded body having decorative part | |
| JPH0327916A (en) | Manufacture of frp molded product multi-colored by press molding | |
| JPS609718A (en) | Surface processing method of molded article made of synthetic resin | |
| JPH11129268A (en) | Method for molding decorative molding | |
| JPH06106556A (en) | Manufacture of colored urethane elastomer molded product |