JP5396354B2 - Manufacturing method of molded products - Google Patents
Manufacturing method of molded products Download PDFInfo
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- JP5396354B2 JP5396354B2 JP2010202612A JP2010202612A JP5396354B2 JP 5396354 B2 JP5396354 B2 JP 5396354B2 JP 2010202612 A JP2010202612 A JP 2010202612A JP 2010202612 A JP2010202612 A JP 2010202612A JP 5396354 B2 JP5396354 B2 JP 5396354B2
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- granular
- molding material
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- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 239000012778 molding material Substances 0.000 claims description 95
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 22
- 229920000877 Melamine resin Polymers 0.000 claims description 20
- 239000004640 Melamine resin Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 19
- 238000004040 coloring Methods 0.000 claims description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 12
- 238000000748 compression moulding Methods 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 239000000049 pigment Substances 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 239000003086 colorant Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- MBHRHUJRKGNOKX-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol Chemical compound NC1=NC(N)=NC(NCO)=N1 MBHRHUJRKGNOKX-UHFFFAOYSA-N 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims 3
- 238000007493 shaping process Methods 0.000 claims 1
- 229920006305 unsaturated polyester Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 description 16
- 229920006337 unsaturated polyester resin Polymers 0.000 description 10
- 239000000203 mixture Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000002274 desiccant Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- -1 vinyl compound Chemical class 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
本発明は、少なくともユリア樹脂あるいはメラミン樹脂からなる装飾ボタン、容器などの成形品の製造方法に関する。
The present invention, decorative buttons comprising at least urea resin or a melamine resin, about the article producer how such containers.
ユリア樹脂成形材料やメラミン樹脂成形材料などのアミノ樹脂成形材料を加熱圧縮成形することによって熱硬化させた熱硬化性樹脂からなる成形品が服飾ボタンや容器などによく用いられている。
また、この種の成形品においては、装飾性を高めるために、異なる色で着色することが求められる場合がある。
Molded products made of thermosetting resins that are thermoset by heat compression molding of amino resin molding materials such as urea resin molding materials and melamine resin molding materials are often used for clothing buttons and containers.
Further, in this type of molded product, it may be required to be colored with a different color in order to enhance the decorativeness.
多数の色に着色された装飾ボタンの製造方法としては、例えば、（１）単色のボタンをまず成形し、このボタンの表面に印刷を施す方法、（２）成形材料と顔料を含む混合物を混練して得た混練物を押出成形して得た色の異なる着色シートを重ね合わせた状態で円柱状に巻き上げて得た円柱状ブロックをさらにプランジャ式の押出機でボタンの外径をした円柱状成形体を連続的に押出ながらボタンの厚さに切断して加飾成形材料を得たのち、この加飾成形材料を加熱圧縮成形する方法（特許文献１参照）、（３）着色された粉状の成形座量を用いて一色ずつ加熱圧縮成形をして、その反応途中で止めたものどうしを合わせて再度加熱圧縮成形する方法などが挙げられる。 For example, (1) a method of first forming a single color button and printing on the surface of the button, and (2) kneading a mixture containing a molding material and a pigment. The cylindrical block obtained by rolling up the kneaded product obtained by extrusion molding into a cylindrical shape in a state of overlapping colored sheets obtained by stacking the outer diameter of the button with a plunger type extruder A method in which a decorative molding material is obtained by cutting a molded body into a button thickness while continuously extruding the molded body, and then this decorative molding material is heated and compression molded (see Patent Document 1), (3) colored powder For example, there may be mentioned a method in which heat compression molding is performed for each color using the shape forming seat amount, and the components stopped in the course of the reaction are combined and heat compression molding is performed again.
しかし、上記（１）〜（３）の方法は、それぞれ以下のような問題がある。
（１）の方法の場合、加熱圧縮成形装置以外に印刷装置が必要であるため、製造コストがかかるとともに、表面に印刷によって着色を施すようにしているので、深みがなく、また、洗濯などによってはげやすいという問題がある。
（２）の方法の場合、押出成形装置が大掛かりであるため、大量生産しないと、コスト的に問題があるとともに、工程が非常に煩雑である。
（３）の方法の場合、工程が煩雑であるとともに、色合いを微妙に変化させた装飾性に高いボタンを得にくい。
また、従来の着色ユリア樹脂成形材料の場合、粗い粒状の成形材料をボールミルで粉砕して粉状にするとともに、顔料をこの粉状体に混合して製造されているため、着色された成形品を製造するには、コストがかかるという問題もある。
However, the methods (1) to (3) have the following problems.
In the case of the method (1), since a printing apparatus is necessary in addition to the heat compression molding apparatus, the manufacturing cost is high, and the surface is colored by printing, so there is no depth, and by washing or the like There is a problem that it is easy to peel off.
In the case of the method (2), since the extrusion molding apparatus is large, unless mass production is performed, there is a problem in cost and the process is very complicated.
In the case of the method (3), the process is complicated, and it is difficult to obtain a button having a high decorativeness with a slightly changed hue.
In addition, in the case of conventional colored urea resin molding materials, a coarse molded molding material is pulverized with a ball mill into a powder form, and a pigment is mixed with the powder form, so a colored molded article There is also a problem that it is expensive to manufacture.
本発明は、上記事情に鑑みて、ユリア樹脂成形材料やメラミン樹脂成形材料を用いて装飾性に富んだ成形品を容易かつ安価に製造することができる成形品の製造方法を提供することを目的としている。
The present invention is, in view of the above circumstances, to provide a manufacturing how a molded article rich moldings decorated property can be easily and inexpensively manufactured using a urea resin material or a melamine resin molding material It is aimed.
上記目的を達成するために、本発明にかかる成形品の製造方法は、少なくとも尿素とホルムアルデヒドとを用いて得られる初期縮合物をセルロース系基材に含浸させたのちに乾燥させて粗粉砕されて得られる粒状ユリア樹脂成形材料、及び、メチロールメラミンを溶剤に溶かし、セルロース系基材に含浸させたのちに乾燥させて粗粉砕されて得られる粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料から選ばれた少なくともいずれかの１種の粒状成形材料の少なくとも表面に、顔料を溶剤で溶解させた着色液を少なくともその表面層に含浸させて得られた粒状着色成形材料を成形金型に必要量供給し、加熱圧縮成形することを特徴としている。 In order to achieve the above object, the method for producing a molded article according to the present invention comprises impregnating a cellulose-based base material with an initial condensate obtained using at least urea and formaldehyde, followed by drying and coarsely pulverizing. The obtained granular urea resin molding material and the granular urea resin molding material and granular melamine resin molding material obtained by dissolving methylol melamine in a solvent, impregnating the cellulose base material, drying and coarsely pulverizing the selected material. At least the surface of at least one kind of granular molding material is supplied with a required amount of granular colored molding material obtained by impregnating at least the surface layer with a colored liquid obtained by dissolving a pigment in a solvent. It is characterized by heat compression molding.
本発明の製造方法において、粒状ユリア樹脂成形材料とは、少なくとも尿素とホルムアルデヒドとを用いて得られる初期縮合物をパルプ等のセルロース系基材に含浸させたのちに乾燥させて粗粉砕されて得られるものをいい、その粒径は、特に限定されないが、粒子が細かすぎると、色合いの変化をつけにくく、粒子が粗すぎると、成形性に問題がでるおそれがあるので、最大径部分が２ｍｍ以上２０ｍｍ以下程度とすることが好ましい。 In the production method of the present invention, the granular urea resin molding material is obtained by impregnating a cellulose-based base material such as pulp with at least an initial condensate obtained using urea and formaldehyde, followed by drying and coarsely pulverizing. The particle size is not particularly limited, but if the particle is too fine, it is difficult to change the hue, and if the particle is too coarse, there is a possibility that the moldability may be problematic, so the maximum diameter part is 2 mm. It is preferable to be about 20 mm or less.
粒状メラミン樹脂成形材料とは、メチロールメラミンを溶剤に溶かし、パルプ等のセルロース系基材に含浸させたのちに乾燥させて粗粉砕されて得られるものをいい、その粒径は、特に限定されないが、粒子が細かすぎると、色合いの変化をつけにくく、粒子が粗すぎると、成形性に問題がでるおそれがあるので、最大径部分が２ｍｍ以上２０ｍｍ以下程度とすることが好ましい。 The granular melamine resin molding material is obtained by dissolving methylol melamine in a solvent, impregnating a cellulose-based substrate such as pulp, drying and coarsely pulverizing, and the particle size is not particularly limited. If the particles are too fine, it is difficult to change the hue, and if the particles are too coarse, there is a possibility that a problem may occur in moldability. Therefore, the maximum diameter portion is preferably about 2 mm or more and 20 mm or less.
粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料の着色方法は、特に限定されないが、従来からユリア樹脂及びメラミン樹脂の着色に用いられている顔料を溶媒に溶解させた着色液を粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料の表面にスプレーを用いて噴霧する方法、前記着色液に粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料を浸漬して含浸させる方法、また、前述の方法によって、一旦単色に着色したのち、さらにその上から色の異なる着色液を噴霧する方法などが挙げられる。
さらに、着色液の粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料の含浸は、粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料の表面層のみでも構わないし、表面層の一部でも構わない。
The coloring method of the granular urea resin molding material and the granular melamine resin molding material is not particularly limited, but a granular liquid obtained by dissolving a pigment conventionally used for coloring urea resin and melamine resin in a solvent is used as the granular urea resin molding material. And a method of spraying the surface of the granular melamine resin molding material using a spray, a method of immersing and impregnating the granular urea resin molding material and the granular melamine resin molding material in the colored liquid, and the method described above, After coloring, the method of spraying the coloring liquid from which a color differs further from the top etc. is mentioned.
Furthermore, the impregnation of the colored urea resin molding material and the granular melamine resin molding material with the colored liquid may be performed only on the surface layer of the granular urea resin molding material and the granular melamine resin molding material, or may be part of the surface layer.
上記溶剤としては、特に限定されないが、メタノール、エタノール、プロパノール等の低級アルコールや水、及びこれらの混合物が挙げられるが、加熱圧縮成形時の成形材料の伸びを考慮すると、メタノールが好ましい。 Examples of the solvent include, but are not limited to, lower alcohols such as methanol, ethanol, and propanol, water, and mixtures thereof. In view of elongation of the molding material during heat compression molding, methanol is preferable.
本発明において、成形金型に供給される粒状着色成形材料は、粒状着色成形材料がそれぞれ複数の色に着色されている場合（表面層が着色され、内部が無着色の状態に残っている場合も含む）は、着色状態が同じであるもののみを必要量用いるようにしてもよいが、装飾性により富んだ成形品を得ようとするならば、複数種の着色状態の異なる粒状着色成形材料を混合した状態で成形金型に供給することが好ましい。
なお、着色状態が異なるとは、粒状着色成形材料ごとの色が異なる、表面の色の配置が異なる、粒状着色成形材料の厚み方向で色が異なることなどをいう。
In the present invention, the granular colored molding material supplied to the molding die is a case where the granular colored molding material is colored in a plurality of colors (when the surface layer is colored and the inside remains uncolored) May also be used in the required amount only in the same colored state, but if it is intended to obtain a molded article rich in decorativeness, a plurality of granular colored molding materials having different colored states It is preferable to supply the molding die in a mixed state.
In addition, that a coloring state differs means that the color differs for every granular coloring molding material, the arrangement | positioning of the surface color differs, a color differs in the thickness direction of a granular coloring molding material, etc.
また、本発明の成形品の製造方法は、上記粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料に、透明不飽和ポリエステル樹脂成形材料を混合した状態でこれらの材料を成形金型に供給するようにしても構わない。
すなわち、透明ポリエステル樹脂成形材料を混合すると、成形時の材料の伸びがよくなり、金型転写性が向上するとともに、光沢のある成形品を得られるようになる。
Further, the method for producing a molded article of the present invention is such that these materials are supplied to a molding die in a state where a transparent unsaturated polyester resin molding material is mixed with the granular urea resin molding material and the granular melamine resin molding material. It doesn't matter.
That is, when the transparent polyester resin molding material is mixed, the elongation of the material at the time of molding is improved, the mold transferability is improved, and a glossy molded product can be obtained.
本発明において、透明不飽和ポリエステル樹脂成形材料は、特に限定されないが、例えば、液体状である不飽和ポリエステル樹脂に触媒（有機過酸化物等）を加えたものに、ゲル化剤（アルカリ土類金属の酸化物（又は水酸化物）、アルミニウムアルコレート、イソシアネートなどをスチレンなどのビニル化合物で希釈したもの）を添加した後、ゲル化するまで攪拌することで得られるものが挙げられる。 In the present invention, the transparent unsaturated polyester resin molding material is not particularly limited. For example, a gelling agent (alkaline earth) is added to a liquid unsaturated polyester resin to which a catalyst (organic peroxide or the like) is added. Examples include those obtained by adding metal oxide (or hydroxide), aluminum alcoholate, isocyanate, etc. diluted with a vinyl compound such as styrene, and then stirring until gelled.
このようにして作られた透明不飽和ポリエステル樹脂成形材料は、乾燥しないように合成樹脂製シートなどで覆って保存することが好ましい。
この透明不飽和ポリエステル樹脂成形材料は、触媒やゲル化剤の影響で徐々に硬化していくが、保存中において揉みほぐし粒状にすることで保存期間は倍以上に増え、夏場で一ヵ月、冬場で三ヵ月は保存可能である。
The transparent unsaturated polyester resin molding material thus produced is preferably stored by being covered with a synthetic resin sheet so as not to be dried.
This transparent unsaturated polyester resin molding material gradually cures due to the influence of the catalyst and gelling agent, but the storage period is more than doubled by making it squeezed and granulated during storage, one month in summer and one month in winter Three months can be stored.
本発明において必要量とは、得ようとする成形品の色柄などによって適宜決定され、特に限定されるものではない。 In the present invention, the necessary amount is appropriately determined depending on the color pattern of the molded product to be obtained, and is not particularly limited.
本発明にかかる成形品の製造方法は、以上のように、粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料から選ばれた少なくともいずれかの１種の粒状成形材料の少なくとも表面に、顔料を溶剤で溶解させた着色液を少なくともその表面層に含浸させて得られた粒状着色成形材料を成形金型に必要量供給し、加熱圧縮成形するので、ユリア樹脂成形材料やメラミン樹脂成形材料を用いて装飾性に富んだ成形品を容易かつ安価に製造することができる。
また、この成形品の製造方法によって得られる本発明のボタンは、装飾性に富んだものとなるとともに、製造コストも抑えることができる。
As described above, the method for producing a molded product according to the present invention includes a pigment as a solvent on at least the surface of at least one of the granular molding materials selected from the granular urea resin molding material and the granular melamine resin molding material. Since the required amount of granular colored molding material obtained by impregnating the dissolved colored liquid into at least the surface layer is supplied to the molding die and subjected to heat compression molding, decoration using urea resin molding material or melamine resin molding material It is possible to easily and inexpensively produce a molded product rich in properties.
In addition, the button of the present invention obtained by this method for producing a molded product is rich in decorativeness and can be manufactured at a low cost.
以下に、本発明を、その実施の形態をあらわす図面を参照しつつ詳しく説明する。
図１〜図４は、本発明にかかる成形品の製造方法の１つの実施の形態であるボタンの製造方法を工程順にあらわしている。
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 4 show a button manufacturing method, which is one embodiment of a method for manufacturing a molded article according to the present invention, in the order of steps.
このボタンの製造方法は、例えば、以下のようにして図５に示すようなボタンを製造することができる。
（１）図示していないが、例えば、青、赤、黄の３種の顔料をそれぞれ溶媒であるメタノールに溶解させて３色の着色液を作製する。
（２）例えば、無着色のユリア樹脂成形材料（例えば、株式会社台和社製乾燥材一級品等の市販のものが用いられる）あるいは無着色のメラミン樹脂成形材料（例えば、株式会社台和社製乾燥材一級品等の市販のものが用いられる）の表面に個別に着色液をスプレー塗布して、図１（ａ）に示すように、表面側に着色部１１を有し、中央に無着色部１２が残った青、赤、黄の単色に着色された粒状着色成形材料１ａ、図１（ｂ）に示すように、表面部分の一部に着色部１３が形成され、残部が無着色部１４として残った青、赤、黄の単色に着色された粒状着色成形材料１ｂ、図１（ｃ）に示すように、図１（ａ）に示す粒状着色成形材料１ａと同様に第１着色部１５と、無着色部１６とを形成したのち、第１着色層１５と異なる色の着色液をスプレー塗布して異なる色の第２着色部１７を備えた粒状着色成形材料１ｃ、図示していないが、さらに別の色の着色液をスプレー塗布して第３着色部を備えた粒状着色成形材料、無着色のユリア樹脂成形材料（例えば、株式会社台和社製乾燥材一級品等の市販のものが用いられる）あるいは無着色のメラミン樹脂成形材料（例えば、株式会社台和社製乾燥材一級品等の市販のものが用いられる）をいずれかの着色液に浸漬して全体が単色に着色された粒状着色成形材料、この全体が単色に着色された粒状着色成形材料の表面にさらに異なる色の着色液をスプレー塗布して、表面側に第２着色部や第３着色部を形成した粒状着色成形材料を得る。
（３）液体状である不飽和ポリエステル樹脂に触媒（有機過酸化物等）を加えたものに、ゲル化剤（アルカリ土類金属の酸化物（又は水酸化物）、アルミニウムアルコレート、イソシアネートなどをスチレンなどのビニル化合物で希釈したもの）を添加した後、ゲル化するまで攪拌して不飽和ポリエステル樹脂成形材料を得る。
（４）上記のようにして得られた粒状着色成形材料中から複数種の粒状着色成形材料を選択して混合するとともに、必要に応じて、不飽和ポリエステル樹脂成形材料をさらに混合する。
（５）（４）のようにして得られた混合物を、加熱圧縮成形装置の成形金型を開き、図２に示すようなボタン形状の凹部２１を多数設けられた下型２の上に、図３及び図４に示すように、必要量供給する。
（６）図４に示す上型３を下型２方向に移動させて、成形金型を閉合し、成形材料を凹部２１の形状に加熱圧縮成形する。
（７）図示していないが、成形材料が熱硬化完了後、成形金型を開放し、下型２上に残ったバリ付きの成形体を取り出し、バリを取り除き、図５に示すボタン４を得る。
In the button manufacturing method, for example, a button as shown in FIG. 5 can be manufactured as follows.
(1) Although not shown, for example, three kinds of pigments of blue, red, and yellow are dissolved in methanol as a solvent to prepare three colored liquids.
(2) For example, an uncolored urea resin molding material (for example, a commercially available product such as a first-class desiccant manufactured by Taiwa Corporation) or an uncolored melamine resin molding material (for example, Taiwa Corporation) A colored liquid is spray-coated individually on the surface of a commercially available product such as a first-class desiccant product), and has a colored portion 11 on the surface side as shown in FIG. As shown in FIG. 1 (b), the colored colored molding material 1a colored in a single color of blue, red, and yellow, where the colored portion 12 remains, a colored portion 13 is formed on a part of the surface portion, and the remaining portion is uncolored. As shown in FIG. 1 (c), the granular coloring molding material 1b that is colored as a single color of blue, red, and yellow remaining as the portion 14 is first colored in the same manner as the granular coloring molding material 1a shown in FIG. 1 (a). After forming the portion 15 and the non-colored portion 16, a colored liquid having a color different from that of the first colored layer 15 is applied. A granular colored molding material 1c provided with a second colored portion 17 of different colors by spray coating, although not shown, a granular colored molding material provided with a third colored portion by spray coating a colored liquid of another color Uncolored urea resin molding materials (for example, commercially available products such as Taiwa Co., Ltd., graded desiccant products) or non-colored melamine resin molding materials (eg, Taiwa Co., Ltd. desiccant grades) (A commercially available product such as a product is used) is immersed in one of the coloring liquids, and the whole is colored in a single color. Is applied by spraying to obtain a granular colored molding material in which the second colored portion and the third colored portion are formed on the surface side.
(3) Gelatinizer (alkaline earth metal oxide (or hydroxide), aluminum alcoholate, isocyanate, etc. added to liquid unsaturated polyester resin with catalyst (organic peroxide etc.) Is diluted with a vinyl compound such as styrene) and stirred until gelation to obtain an unsaturated polyester resin molding material.
(4) A plurality of types of granular colored molding materials are selected and mixed from the granular colored molding materials obtained as described above, and an unsaturated polyester resin molding material is further mixed as necessary.
(5) Open the molding die of the heat compression molding apparatus for the mixture obtained as described in (4), and on the lower mold 2 provided with a large number of button-shaped recesses 21 as shown in FIG. As shown in FIGS. 3 and 4, the required amount is supplied.
(6) The upper die 3 shown in FIG. 4 is moved in the lower die 2 direction, the molding die is closed, and the molding material is heat compression molded into the shape of the recess 21.
(7) Although not shown, after the molding material is thermally cured, the molding die is opened, the molded product with burrs remaining on the lower mold 2 is taken out, the burrs are removed, and the button 4 shown in FIG. obtain.
この製造方法は、上記のように、粒状ユリア樹脂成形材料及び粒状メラミン樹脂成形材料が基材としてパルプ等のセルロース繊維を６０〜７０％含むので、着色液の浸透性に優れている。したがって、粗い粒状の成形材料に着色液を含浸させることによって長時間かかる粉砕工程など経ずに粒状着色成形材料が得られるので、粉体の着色成形材料に比べ、安価に、かつ、容易に着色成形材料を得ることができる。 As described above, this manufacturing method is excellent in the permeability of the colored liquid because the granular urea resin molding material and the granular melamine resin molding material contain 60 to 70% of cellulose fibers such as pulp as a base material. Therefore, by impregnating a coarse granular molding material with a coloring liquid, a granular colored molding material can be obtained without going through a pulverizing process that takes a long time. A molding material can be obtained.
そして、例えば、上記青、赤、黄の単色に着色された図１（ａ）に示すような３色の粒状着色成形材料１ａを混合した混合物を用いれば、青い部分、赤い部分、黄色い部分、青と赤とが混ざり合った紫色の部分、青と黄とが混ざり合った緑色部分、赤と黄とが混ざり合った橙色部分などが混ざり合うとともに、無着色部分によって、白色半透明な部分を備えたカラフルで装飾性の高いボタンを得ることができる。 And, for example, if a mixture obtained by mixing the above three colored granular molding materials 1a colored in blue, red and yellow is used, a blue part, a red part, a yellow part, A purple portion where blue and red are mixed, a green portion where blue and yellow are mixed, an orange portion where red and yellow are mixed, etc. You can get a colorful and highly decorative button.
また、上記粒状着色成形材料にさらに透明不飽和ポリエステル樹脂成形材料を混合した混合物を金型に供給するようにすれば、表面が透明不飽和ポリエステル樹脂で覆われて光沢のあるボタン５を得ることができる。 Further, if a mixture obtained by further mixing a transparent unsaturated polyester resin molding material with the granular colored molding material is supplied to the mold, the glossy button 5 is obtained with the surface covered with the transparent unsaturated polyester resin. Can do.
また、無着色の粉状成形材料をまず下型２の上に所定厚みで供給した後、上記混合物をこの粉状成形材料の上に供給し、加熱圧縮成形すれば、無着色の底面部の上にカラフルな上層部分を備えた装飾性の高いボタン５を得ることができる。
さらに、混合物は、粒状着色ユリア樹脂成形材料のみ、粒状着色メラミン樹脂成形材料のみ、あるいは、粒状着色ユリア樹脂成形材料及び粒状着色メラミン樹脂成形材料を混合したものでも構わない。
Further, after supplying a non-colored powdery molding material to the lower mold 2 at a predetermined thickness, if the mixture is supplied onto the powdery molding material and heat compression molded, A highly decorative button 5 having a colorful upper layer portion thereon can be obtained.
Furthermore, the mixture may be only the granular colored urea resin molding material, only the granular colored melamine resin molding material, or a mixture of the granular colored urea resin molding material and the granular colored melamine resin molding material.
すなわち、この成形品の製造方法によれば、粉状の成形材料に比べて１／２以下である粉体にする前の粒状成形材料を使用しているので、材料が安価である。しかも、この粒状成形材料に着色液を含浸させるだけで、容易に着色成形材料が得られる。そして、着色状態や粒径の異なる粒状着色成形材料を選択的に組み合わせたり、各粒状着色成形材料の混合比率を変更したりすることによって、いろいろなパターンの色彩模様を備えた装飾性に富んだ成形品を得ることができる。 That is, according to this method for manufacturing a molded product, since the granular molding material is used before it is made into powder that is ½ or less of the powdery molding material, the material is inexpensive. In addition, the colored molding material can be easily obtained simply by impregnating the granular molding material with the coloring liquid. And by selectively combining granular colored molding materials with different coloring states and particle sizes, or by changing the mixing ratio of each granular colored molding material, it is rich in decorativeness with various patterns of color patterns. A molded product can be obtained.
本発明は、上記の実施の形態に限定されない。例えば、上記の実施の形態では、成形品がボタンであったが、得られる成形品としては、特に限定されず、花瓶やお盆などでも構わないし、ネックレスなどの装飾品に用いられる玉状成形品でも構わない。
上記の実施の形態では、着色液の色が青、赤、黄の３色であったが、他の色の着色液を用いてもよく、４色以上の異なる色の着色部を設けるようにしても構わない。
The present invention is not limited to the above embodiment. For example, in the above embodiment, the molded product is a button, but the obtained molded product is not particularly limited, and may be a vase, a tray, or the like, and a ball-shaped molded product used for a decorative product such as a necklace. It doesn't matter.
In the above embodiment, the colors of the colored liquids are three colors of blue, red, and yellow. However, other colored liquids may be used, and four or more different colored portions are provided. It doesn't matter.
１ａ，１ｂ，１ｃ 粒状着色成形材料
１１ 着色部
１２ 無着色部
１３ 着色部
１４ 無着色部
１５ 第１着色部
１６ 無着色部
１７ 第２着色部
２ 下型
２１ 凹部
３ 上型
４ ボタン（成形品）
1a, 1b, 1c Granular colored molding material 11 Colored portion 12 Uncolored portion 13 Colored portion 14 Uncolored portion 15 First colored portion 16 Uncolored portion 17 Second colored portion 2 Lower mold 21 Recess 3 Upper mold 4 Button (molded product) )
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