JPH06198462A - Marking method to thermosetting resin - Google Patents
Marking method to thermosetting resinInfo
- Publication number
- JPH06198462A JPH06198462A JP4342266A JP34226692A JPH06198462A JP H06198462 A JPH06198462 A JP H06198462A JP 4342266 A JP4342266 A JP 4342266A JP 34226692 A JP34226692 A JP 34226692A JP H06198462 A JPH06198462 A JP H06198462A
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- laser beam
- molded
- resin
- marking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Laser Beam Processing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーザビームを用いて
熱硬化性合成樹脂の表面に刻印を施す熱硬化性樹脂への
マーキング方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking method for a thermosetting resin in which the surface of the thermosetting synthetic resin is marked with a laser beam.
【０００２】[0002]
【従来の技術】従来より、熱硬化性合成樹脂の成形品の
表面に文字や記号などを付すマーキング方法としては、
成形品とは異なる色の液状の印刷材料を吹きつけたり印
刷したりした後に印刷材料を乾燥させる方法が採用され
ている。2. Description of the Related Art Conventionally, as a marking method for attaching characters or symbols to the surface of a molded product of thermosetting synthetic resin,
A method of spraying or printing a liquid printing material having a color different from that of the molded article and then drying the printing material is adopted.
【０００３】[0003]
【発明が解決しようとする課題】上記従来方法では、成
形品とマーキングを施す印刷材料とは異なる材料である
から、成形品と印刷材料とを完全に密着させることがで
きず、耐熱衝撃性、耐候性、耐摩耗性などが十分ではな
いという問題がある。このような問題を解決するため
に、成形品の成形時に付すべき文字や記号を成形品の表
面に対して突出ないし凹陥させる方法が考えられる。し
かしながら、この方法では文字や記号に相当する型を成
形型に設けることが必要であって、各成形品に同じ文字
や記号を付す目的には使用できても、量産品に通し番号
などを付与する目的には適さないという問題がある。In the above conventional method, since the molded product and the printing material for marking are different materials, the molded product and the printing material cannot be completely adhered to each other, and the thermal shock resistance, There is a problem that weather resistance and abrasion resistance are not sufficient. In order to solve such a problem, a method is conceivable in which a character or symbol to be applied at the time of molding a molded product is projected or recessed with respect to the surface of the molded product. However, in this method, it is necessary to provide the mold with a mold corresponding to the letters and symbols, and even if it can be used for the purpose of attaching the same letters and symbols to each molded product, serial numbers etc. are given to mass-produced products. There is a problem that it is not suitable for the purpose.
【０００４】本発明は上記問題点の解決を目的とするも
のであり、成形後の成形品にレーザビームを照射するこ
とによって任意の文字や記号を刻印することができるよ
うにし、かつレーザビームの照射のみによって文字や記
号を成形品とは異なる色に発色させることができるよう
にした熱硬化性樹脂へのマーキング方法を提供しようと
するものである。An object of the present invention is to solve the above-mentioned problems, and by irradiating a molded product after molding with a laser beam, it is possible to engrave arbitrary characters and symbols, and the laser beam An object of the present invention is to provide a marking method for a thermosetting resin, which is capable of developing a character or a symbol in a color different from that of a molded product only by irradiation.
【０００５】[0005]
【課題を解決するための手段】本発明では、上記目的を
達成するために、ユリア樹脂、フェノール樹脂のいずれ
かから選択した熱硬化性合成樹脂とケイ素と顔料とを含
む材料を直圧成形法により成形した後、成形品の表面に
エネルギー密度が３００００ｋＷ／ｃｍ2 以上であるレ
ーザビームを照射して刻印するのである。According to the present invention, in order to achieve the above object, a material containing a thermosetting synthetic resin selected from urea resin and phenol resin, silicon and pigment is directly pressure-molded. After molding by, the surface of the molded product is irradiated with a laser beam having an energy density of 30,000 kW / cm 2 or more for marking.
【０００６】[0006]
【作用】上記方法によれば、熱硬化性合成樹脂の成形品
がケイ素と顔料とを含んでいるのであって、エネルギー
密度の大きなレーザビームを照射してこの成形品の表面
に刻印を施すことによって、成形品の表面に成形品とは
異なる色の文字や記号を刻印することができるのであ
る。発色の機構については明確にはなっていないが、熱
硬化性合成樹脂がレーザビームによって蒸発した部分で
ケイ素、顔料、あるいはそれらの化合物が蒸発せずに残
留して白色に発色するか、熱硬化性合成樹脂に含まれる
炭素が二酸化炭素になって蒸発する際に成形品の表面に
多数の微細な気泡が形成され、これが拡散反射面となっ
て白色に発色するなどの機構が考えられる。いずれにせ
よ上記方法によって白色の刻印を施すことができるので
あって、熱硬化性合成樹脂の成形品が他の色に着色され
ていれば、明瞭なコントラストを有した刻印を施すこと
ができるのである。また、成形後の成形品に対してレー
ザビームを照射するから刻印すべき文字や記号に対応し
た型を必要とせず、しかもレーザビームの照射位置を制
御するだけで任意の文字や記号を刻印することができる
から、任意の形状の成形品に刻印することができるとと
もに、成形品ごとに異なる文字や記号を容易に刻印する
ことができる。さらには、刻印された文字や記号は成形
品に対して別の材料を用いたものではないから、耐熱衝
撃性、耐候性、耐摩耗性などにすぐれた刻印を施すこと
ができるのである。According to the above method, since the molded product of thermosetting synthetic resin contains silicon and pigment, the surface of the molded product is marked by irradiating it with a laser beam having a large energy density. Thus, the surface of the molded product can be engraved with characters or symbols in a color different from that of the molded product. Although the mechanism of color development has not been clarified, silicon, pigment, or their compounds remain without evaporation at the portion where the thermosetting synthetic resin is vaporized by the laser beam to develop white color, or thermosetting It is conceivable that a large number of fine bubbles are formed on the surface of the molded product when carbon contained in the synthetic resin becomes carbon dioxide and evaporates, and this becomes a diffuse reflection surface to develop white color. In any case, it is possible to make a white marking by the above method, and if the thermosetting synthetic resin molded product is colored in another color, it is possible to make a marking with a clear contrast. is there. Further, since the laser beam is irradiated to the molded product after molding, a mold corresponding to the character or symbol to be marked is not required, and moreover, any character or symbol can be marked only by controlling the irradiation position of the laser beam. Therefore, it is possible to engrave a molded product having an arbitrary shape, and it is possible to easily engrave different characters or symbols for each molded product. Furthermore, since the engraved characters and symbols do not use a different material for the molded product, engraving excellent in thermal shock resistance, weather resistance, wear resistance and the like can be performed.
【０００７】[0007]
【実施例】本発明方法を実施する装置を図１に示す。レ
ーザビームはレーザ光源１より発生し、偏向ミラーなど
を備えた偏向装置２により任意の方向に偏向される。偏
向装置２はコンピュータのような制御装置３によって制
御され、制御装置３に設定した文字や記号が成形品４の
表面に刻印される。成形品４は、ユリア樹脂またはフェ
ノール樹脂を直圧成形法により成形したものであって、
少なくとも表面部分にはケイ素と顔料とを含んでいる。
ケイ素はケイ素化合物の形で含まれていればよい。ま
た、制御装置３は、エネルギー供給装置５を通してレー
ザ光源１の出力も制御しており、レーザ光源１からはパ
ルス変調された略一定のエネルギーのレーザビームが出
力されるようになっている。このような構成の装置によ
って、レーザビームの成形品の表面でのエネルギー密度
を３８０００ｋＷ／ｃｍ2 に設定したところ、成形品４
の表面に白色の刻印６を施すことができた。FIG. 1 shows an apparatus for carrying out the method of the present invention. A laser beam is generated by a laser light source 1 and is deflected in an arbitrary direction by a deflecting device 2 including a deflecting mirror. The deflection device 2 is controlled by a control device 3 such as a computer, and characters or symbols set in the control device 3 are imprinted on the surface of the molded product 4. The molded product 4 is a product obtained by molding urea resin or phenol resin by a direct pressure molding method,
At least the surface portion contains silicon and a pigment.
Silicon may be contained in the form of a silicon compound. The control device 3 also controls the output of the laser light source 1 through the energy supply device 5, and the laser light source 1 outputs a pulse-modulated laser beam of substantially constant energy. When the energy density of the laser beam on the surface of the molded product was set to 38000 kW / cm 2 by the apparatus having such a configuration, the molded product 4
White marking 6 could be made on the surface of the.
【０００８】レーザビームのエネルギー密度は、次式で
求めることができる。すなわち、レーザビームのパワー
のピーク値をＰ、成形品４の表面でのレーザビームによ
るスポットの直径をＡとすれば、エネルギー密度ωは、 ω＝Ｐ／Ａ であって、レーザビームが周期ｔr 、オン期間ｔw でパ
ルス変調され、その平均エネルギーがＡＰであるとすれ
ば、 ＡＰ・ｔr ＝Ｐ・ｔw であるから、結局、エネルギー密度ωは、 ω＝（ｔr ／ｔw ）・ＡＰ／Ａ と表すことができる。たとえば、レーザビームの平均エ
ネルギーを１Ｗ、周期を２００μＳ、オン期間を１７０
ｎＳ、スポットの直径を２００μｍに設定すれば、上式
によって、２００×１０-6／（１７０×１０-9）×１／
｛（１００×１０ -6）2 ×３．１４｝≒３７０００ｋＷ
／ｃｍ2 となり、エネルギー密度を約３８０００ｋＷ／
ｃｍ2 とする場合には、レーザビームの平均エネルギー
を１Ｗより若干大きい程度に設定すればよいことがわか
る。The energy density of the laser beam is
You can ask. That is, the power of the laser beam
Is the peak value of P, and the laser beam on the surface of the molded product 4
The energy density ω is ω = P / A, and the laser beam has a period tr, ON period twIn the
Russ-modulated and its average energy is AP
For example, APtr= Ptw Therefore, after all, the energy density ω is ω = (tr/ Tw) -AP / A For example, the average energy of the laser beam
Energy 1W, cycle 200μS, ON period 170
If nS and the spot diameter are set to 200 μm,
By 200 × 10-6/ (170 x 10-9) × 1
{(100 × 10 -6)2× 3.14} ≒ 37,000kW
/ Cm2And the energy density is about 38000kW /
cm2And the average energy of the laser beam
I know that I should set the value to a value slightly larger than 1W.
It
【０００９】[0009]
【発明の効果】本発明は上述のように、ユリア樹脂、フ
ェノール樹脂のいずれかから選択した熱硬化性合成樹脂
とケイ素と顔料とを含む材料を直圧成形法により成形し
た後、成形品の表面にエネルギー密度が３００００ｋＷ
／ｃｍ2 以上であるレーザビームを照射して刻印するも
のであり、熱硬化性合成樹脂の成形品がケイ素と顔料と
を含んでいるのであって、エネルギー密度の大きなレー
ザビームを照射してこの成形品の表面に刻印を施すこと
によって、成形品の表面に白色の刻印を迅速に施すこと
ができ、熱硬化性合成樹脂の成形品が他の色に着色され
ていれば、明瞭なコントラストを有した刻印を施すこと
ができるという利点がある。また、成形後の成形品に対
してレーザビームを照射するから刻印すべき文字や記号
に対応した型を必要とせず、しかもレーザビームの照射
位置を制御するだけで任意の文字や記号を刻印すること
ができるから、任意の形状の成形品に刻印することがで
きるとともに、成形品ごとに異なる文字や記号を容易に
刻印することができるという効果を奏する。さらに、刻
印された文字や記号は成形品に対して別の材料を用いた
ものではないから、耐熱衝撃性、耐候性、耐摩耗性など
にすぐれた刻印を施すことができるという効果がある。As described above, according to the present invention, a material containing a thermosetting synthetic resin selected from urea resin and phenol resin, silicon and pigment is molded by a direct pressure molding method, and then a molded product is obtained. Energy density of 30,000 kW on the surface
The marking is performed by irradiating with a laser beam of not less than / cm 2 and the thermosetting synthetic resin molded product contains silicon and a pigment. By marking the surface of the molded product, it is possible to quickly make a white marking on the surface of the molded product, and if the molded product of thermosetting synthetic resin is colored in another color, a clear contrast will be obtained. There is an advantage that the engraved mark that has been provided can be applied. Further, since the laser beam is irradiated to the molded product after molding, a mold corresponding to the character or symbol to be marked is not required, and moreover, any character or symbol can be marked only by controlling the irradiation position of the laser beam. Therefore, it is possible to engrave a molded product having an arbitrary shape, and it is possible to easily engrave different characters and symbols for each molded product. Further, since the engraved characters and symbols are not formed by using a different material for the molded product, there is an effect that engraving excellent in thermal shock resistance, weather resistance, abrasion resistance and the like can be performed.
【図１】実施例を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an embodiment.
１ レーザ光源 ２ 偏向装置 ３ 制御装置 ４ 成形品 ５ エネルギー供給装置 ６ 刻印 DESCRIPTION OF SYMBOLS 1 Laser light source 2 Deflection device 3 Control device 4 Molded product 5 Energy supply device 6 Stamp
Claims (1)
から選択した熱硬化性合成樹脂とケイ素と顔料とを含む
材料を直圧成形法により成形した後、成形品の表面にエ
ネルギー密度が３００００ｋＷ／ｃｍ2 以上であるレー
ザビームを照射して刻印することを特徴とする熱硬化性
樹脂へのマーキング方法。1. A thermosetting synthetic resin selected from urea resin and phenol resin, a material containing silicon and a pigment are molded by a direct pressure molding method, and the energy density is 30,000 kW / cm on the surface of the molded product. A marking method for a thermosetting resin, which comprises marking by irradiating a laser beam of 2 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34226692A JP3193794B2 (en) | 1992-12-22 | 1992-12-22 | Marking method for thermosetting resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34226692A JP3193794B2 (en) | 1992-12-22 | 1992-12-22 | Marking method for thermosetting resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06198462A true JPH06198462A (en) | 1994-07-19 |
| JP3193794B2 JP3193794B2 (en) | 2001-07-30 |
Family
ID=18352388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34226692A Expired - Lifetime JP3193794B2 (en) | 1992-12-22 | 1992-12-22 | Marking method for thermosetting resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3193794B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012073091A1 (en) * | 2010-12-02 | 2012-06-07 | Panasonic Corporation | Laser marking method and urea resin product |
-
1992
- 1992-12-22 JP JP34226692A patent/JP3193794B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012073091A1 (en) * | 2010-12-02 | 2012-06-07 | Panasonic Corporation | Laser marking method and urea resin product |
| CN103237662A (en) * | 2010-12-02 | 2013-08-07 | 松下电器产业株式会社 | Laser marking method and urea resin product |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3193794B2 (en) | 2001-07-30 |
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