JPH0247314B2 - - Google Patents
Info
- Publication number
- JPH0247314B2 JPH0247314B2 JP60150250A JP15025085A JPH0247314B2 JP H0247314 B2 JPH0247314 B2 JP H0247314B2 JP 60150250 A JP60150250 A JP 60150250A JP 15025085 A JP15025085 A JP 15025085A JP H0247314 B2 JPH0247314 B2 JP H0247314B2
- Authority
- JP
- Japan
- Prior art keywords
- marking
- resin
- thermoplastic resin
- ink
- irradiation
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 30
- 229920005992 thermoplastic resin Polymers 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 239000006260 foam Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 6
- 238000005187 foaming Methods 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Laser Beam Processing (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は熱可塑性樹脂のマーキング方法に係
り、特にレーザによる非接触マーキング方法とし
て微細な文字、図形のマーキングに好適な熱可塑
性樹脂のマーキング方法に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for marking thermoplastic resin, and more particularly, to a method for marking thermoplastic resin suitable for marking minute characters and figures as a non-contact marking method using a laser. .
従来の熱可塑性樹脂のマーキング方法いは、イ
ンクジエツト方式によるインクの吹き付け、スク
リーン印刷、インク書込み方式等がある。インク
ジエツト方式、スクリーン印刷は樹脂面にインク
を塗布乾燥させ付着するものであるがインクと樹
脂の材質が異なり完全な密着状態を作ることが難
しくインクの選択にあたつてはその点を留意しな
ければならない。一般にこれらの方法では耐熱衝
撃性（インク面の剥れ）、耐侯性（インクの変色）
耐摩耗性（インク面の摩耗）に問題がある。又、
インク埋込み方式では樹脂のマーキング箇所を予
め成形時に凹みを着けるか、成形後彫刻を施こし
その箇所にインク、塗料を埋込みマーキングす
る。成形時に凹みを付ける方法ではマーキング形
状を任意に変えることが難しく、彫刻を行なう方
法では刻印に多大な時間を費すと共に後からイン
ク、塗料を埋込み余分なインク、塗料を取り除く
必要がある為工程が複雑となり量産品へのマーキ
ング方法として適していない。これらの方法はプ
ラスチツク材料講座12「アクリル樹脂」1970年日
刊工業新聞社発行、浅見高著書に記述されてい
る。レーザ光によるマーキング方式の例として特
開昭59−14993号公報、特開昭59−5267号公報が
ある。しかしこれらは何れもマーキング対象物を
多層にし、レーザ照射によつてどの層を露出させ
るかの方法をとつていて、材料を吟味しなければ
ならないという欠点がある。
Conventional methods for marking thermoplastic resins include spraying ink using an inkjet method, screen printing, and ink writing methods. In the inkjet method and screen printing, ink is applied to the resin surface and allowed to dry and adhere, but because the materials of the ink and resin are different, it is difficult to create perfect adhesion, so this must be kept in mind when selecting the ink. Must be. In general, these methods have problems with thermal shock resistance (peeling of the ink surface) and weather resistance (discoloration of the ink).
There is a problem with abrasion resistance (wear of the ink surface). or,
In the ink embedding method, indentations are made in advance during molding at the marking points in the resin, or engravings are performed after molding, and ink or paint is embedded in the marking points. With the method of adding indentations during molding, it is difficult to change the marking shape arbitrarily, and with the method of engraving, it takes a lot of time to make the mark, and it is necessary to embed ink and paint afterwards and remove the excess ink and paint, which makes the process difficult. This method is complicated and is not suitable as a marking method for mass-produced products. These methods are described in Plastic Materials Course 12 "Acrylic Resin", published by Nikkan Kogyo Shimbun in 1970, written by Takashi Asami. Examples of marking methods using laser light include JP-A-59-14993 and JP-A-59-5267. However, in all of these methods, the marking target is made of multiple layers, and the method is used to determine which layer is exposed by laser irradiation, and the disadvantage is that the material must be carefully selected.
本発明の目的は、レーザ光により、耐久性に優
れた鮮明なマーキングを行う方法を提供すること
にある。
An object of the present invention is to provide a method for making clear markings with excellent durability using laser light.
本発明はアクリル樹脂が熱可塑性であり局部的
に著しい加熱を加えると樹脂中に含まれる未重合
モノマー、分解生成物等の揮発分が発泡するとい
う現象に着目しこれをマーキングに応用したこと
に特徴がある。
The present invention focuses on the phenomenon that acrylic resin is thermoplastic, and when significant local heating is applied, volatile components such as unpolymerized monomers and decomposition products contained in the resin foam, and have applied this to marking. It has characteristics.
すなわち本発明はレーザ光の照射量を、樹脂が
蒸発してしまう直前の発泡状態でレーザ照射を止
め、発泡現象そのものをマーキングに利用するこ
とにある。 That is, the present invention is to control the amount of laser light irradiation by stopping the laser irradiation when the resin is in a foamed state just before it evaporates, and to utilize the foaming phenomenon itself for marking.
〔発明の実施例〕
はじめに、本発明の樹脂における発泡現象いつ
いて説明する。[Embodiments of the Invention] First, the foaming phenomenon in the resin of the present invention will be explained.
第１図ａのごとくレーザ光２を有色熱可塑性樹
脂１に照射すると先ず照射部３が軟化溶解する。
次に溶解樹脂中に含まれる揮発成分が発泡し照射
部３が第１図ｂのように盛り上がる。この状態で
レーザ光の照射を中止すると第３図ｃのように溶
解樹脂は内部に多数の泡を含んで隆起し、冷却固
化されるので照射部３は光を乱反射し乳白色とな
つて見える（これによりレーザ光を照射しない有
色部との間に明暗と生じ、かつ隆起する為文字、
図形等を明瞭にマーキングすることができる）。 When the colored thermoplastic resin 1 is irradiated with the laser beam 2 as shown in FIG. 1a, the irradiated portion 3 is first softened and dissolved.
Next, the volatile components contained in the melted resin foam and the irradiated area 3 bulges as shown in FIG. 1b. When the laser beam irradiation is stopped in this state, the melted resin bulges up with many bubbles inside, as shown in Fig. 3c, and is cooled and solidified, so that the irradiated part 3 reflects the light diffusely and appears milky white ( This creates brightness and darkness between the colored parts that are not irradiated with laser light, and the characters are raised.
(Can clearly mark figures, etc.)
本発明の一実施例を第２図、第３図により説明
する。レーザ光を熱可塑性樹脂面に照射する方法
として第２図ａに示すようにレーザ光２を固定し
被マーキング物である熱可塑性樹脂板１を前後左
右に移動する方法、第２図ｂに示すように熱可塑
性樹脂板は固定しレーザ光を前後左右に移動する
方法、第２図ｃに示すようにマーキング文字をく
り抜いたマスク５を集光しレンズ４と熱可塑性樹
脂板１の間に入れ文字し一回のレーザ光照射によ
つてマーキングする方法などがある。 An embodiment of the present invention will be described with reference to FIGS. 2 and 3. As a method of irradiating a thermoplastic resin surface with a laser beam, there is a method of fixing the laser beam 2 as shown in FIG. 2a and moving the thermoplastic resin plate 1, which is the object to be marked, back and forth and left and right, as shown in FIG. 2b. As shown in Fig. 2, the thermoplastic resin plate is fixed and the laser beam is moved back and forth and left and right.As shown in Fig. 2c, a mask 5 with marking letters cut out is focused and placed between the lens 4 and the thermoplastic resin plate 1. There is a method of marking using a single laser beam irradiation.
レーザ光の照射量（La）と発泡量（Bub）と
の関係を示すと第２図ｄのようになり、照射量が
比較的小さいところで発泡効果が顕著に表われる
値を選定し、選定された照射量に制御することに
より良好なマーキングをおこなうことができる。
照射量はその振幅と時間幅との積の累積値などに
よつて評価する方法がある。また発泡効果は、レ
ーザ光照射によつて溶融された部分のうち、マー
キング対象物表面よりも盛り上つている部分の体
積、あるいは盛り上り部の高さなどを指標にとつ
てもよい。 The relationship between the amount of laser light irradiation (La) and the amount of foaming (Bub) is shown in Figure 2 d, and the value was selected so that the foaming effect is noticeable when the irradiation amount is relatively small. Good marking can be achieved by controlling the irradiation amount to a certain level.
There is a method of evaluating the irradiation amount based on the cumulative value of the product of its amplitude and time width. Further, the foaming effect may be measured by the volume of the part that is raised above the surface of the marking object, or the height of the raised part, among the parts melted by laser beam irradiation.
これらレーザの特性を第２図ｅに示す。それぞ
れの用途に適した領域で使用すればよい。 The characteristics of these lasers are shown in Figure 2e. They can be used in areas suitable for each purpose.
この発泡現象を定量的に把握することについて
はまだ確立されていないが、与えられた材料ごと
にその照射量を変えて実験し、マーキングに最も
適した条件を選ぶことによつて実用的には実施で
きる。 Although it has not yet been established to quantitatively understand this bubbling phenomenon, it is possible to achieve practical results by experimenting with different irradiation doses for each given material and selecting the most suitable conditions for marking. Can be implemented.
この方法によりマーキングできるものとして、
第３図ａに示す制御盤、配電盤の銘板、又は一般
的に用いられる標示板がある。これらのものは一
品毎にマーキング文字が異なり従来のスクリーン
印刷では版を製作する費用、時間がかかり高価な
ものとなつていたが本発明によれば第２図ａ，ｂ
の方法により版を必要としない為安価に短時間に
銘板を製作することができる。マーキング文字等
は鮮明な白色隆起文字となる。第３図ｂは抵抗部
品、第３図ｃはキーボード押しボタンを示す。こ
れら部品は同一文を大量にマーキングする例であ
るが、材質に有色熱可塑性樹脂を使い第２図ｃの
方法で高速、安価にマーキングできる。このよう
に熱可塑性樹脂を使用している部品では、部品番
号、製造番号等の製品データを鮮明にかつ容易に
マーキングすることが可能である。熱可塑性樹脂
の中でも美観、耐侯性、機械的性質に優れている
アクリル樹脂が最もマーキング対象として適して
いる。 Items that can be marked using this method include:
There is a name plate of a control panel, a power distribution panel, or a commonly used sign plate as shown in FIG. 3a. These products have different marking characters for each item, and in conventional screen printing, it was costly and time-consuming to produce plates, but according to the present invention, as shown in Figures 2a and b.
Since the method does not require a plate, nameplates can be manufactured at low cost and in a short time. Marking letters, etc. will be clear white raised letters. FIG. 3b shows the resistor components, and FIG. 3c shows the keyboard pushbuttons. These parts are an example of marking a large number of parts with the same text, and using colored thermoplastic resin as the material, marking can be done quickly and inexpensively by the method shown in Figure 2c. In this way, parts using thermoplastic resin can be clearly and easily marked with product data such as part number and serial number. Among thermoplastic resins, acrylic resin is the most suitable for marking because of its excellent appearance, weather resistance, and mechanical properties.
本発明によるとマーキング凸部が摩耗によりた
とえ平坦になつた場合にも白色部が表面平坦部よ
り浸透している為マーキング部は残るので耐久性
に優れたものである。また、マーキング装置とし
てレーザ装置を用いる為レーザ光スポツト径を絞
ることにより50μｍ幅程度の微細な線を描くこと
ができ、従来のマーキング方法では不可能な小さ
な文字をマーキングできる。又、レーザ光、ある
いは被マーキング物を二次元方向に移動させるこ
とにより、あらゆる文字、図形を描くことができ
る。さらにレーザ光による非接触マーキングの
為、マーキングスピードが早く1.0mm幅の線を毎
秒200mm以上の速度で描くことができる。 According to the present invention, even if the marking convex part becomes flat due to wear, the marking part remains because the white part has penetrated the surface flat part, so the marking part is excellent in durability. Furthermore, since a laser device is used as the marking device, by narrowing down the diameter of the laser beam spot, it is possible to draw fine lines with a width of about 50 μm, making it possible to mark small characters that are impossible with conventional marking methods. Furthermore, by moving the laser beam or the object to be marked in two-dimensional directions, any characters or figures can be drawn. Furthermore, since it is a non-contact marking method using laser light, the marking speed is fast and lines with a width of 1.0 mm can be drawn at a speed of over 200 mm per second.
本発明によれば熱可塑性樹脂にレーザ光を用い
てマーキング部が凸形状の鮮明なマーキングとお
こなうことができる。
According to the present invention, it is possible to clearly mark a thermoplastic resin with a convex marking portion using a laser beam.
第１図は熱可塑性樹脂板にレーザ光を照射した
時の樹脂の形状断面図、第２図ａ〜ｃはレーザ光
の照射方法を示した例を、第２図ｄ，ｅはその照
射特性の一例を示す、第３図はレーザ光による熱
可塑性樹脂マーキング方法を適用した外観側を、
それぞれ示す。
１……熱可塑性樹脂材、２……レーザ光、３…
…レーザ光照射部、４……レーザ光集光レンズ、
５……マスク。
Figure 1 is a cross-sectional view of the resin shape when a thermoplastic resin plate is irradiated with laser light, Figures 2 a to c are examples of the laser light irradiation method, and Figures 2 d and e are the irradiation characteristics. Figure 3 shows an example of the external appearance of a thermoplastic resin marking method using laser light.
Each is shown below. 1...Thermoplastic resin material, 2...Laser light, 3...
...Laser light irradiation part, 4...Laser light condensing lens,
5...Mask.
Claims (1)
照射部を発泡隆起させ、該発泡隆起された部分に
よつてマーキング部を形成することを特徴とする
樹脂のマーキング方法。1. A method for marking a resin, which comprises irradiating the surface of a thermoplastic resin with a laser beam to foam and bulge the irradiated portion, and forming a marking portion by the foamed and bulge portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60150250A JPS6213287A (en) | 1985-07-10 | 1985-07-10 | Marking method for resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60150250A JPS6213287A (en) | 1985-07-10 | 1985-07-10 | Marking method for resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6213287A JPS6213287A (en) | 1987-01-22 |
| JPH0247314B2 true JPH0247314B2 (en) | 1990-10-19 |
Family
ID=15492836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60150250A Granted JPS6213287A (en) | 1985-07-10 | 1985-07-10 | Marking method for resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6213287A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5981647A (en) * | 1996-09-10 | 1999-11-09 | Daicel Chemical Industries, Ltd. | Resin composition for a white marking |
| WO2009037993A1 (en) | 2007-09-20 | 2009-03-26 | Japan Coloring Co., Ltd. | Oversheet for card |
| EP2272917A1 (en) | 2001-01-22 | 2011-01-12 | Idemitsu Kosan Co., Ltd. | Polycarbonate resin compositions for laser marking and molded articles made thereof |
| JP2011103397A (en) * | 2009-11-11 | 2011-05-26 | Sharp Corp | Solar cell module assembly, method of manufacturing the same, and moving body |
| WO2012176533A1 (en) | 2011-06-21 | 2012-12-27 | 日本カラリング株式会社 | Sheet for card |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2554632B2 (en) * | 1986-08-15 | 1996-11-13 | ソニ−ケミカル株式会社 | Card recording material |
| JP2862413B2 (en) * | 1991-10-02 | 1999-03-03 | ポリプラスチックス株式会社 | Laser marking method |
| JP2002278465A (en) * | 2001-03-19 | 2002-09-27 | Max Co Ltd | Electric pole number tag and producing system of the same |
| ATE380358T1 (en) | 2002-10-28 | 2007-12-15 | Fujifilm Corp | LASER MARKING PROCESS |
| JP4723850B2 (en) * | 2004-11-25 | 2011-07-13 | 株式会社ニコン・エシロール | Marking method, spectacle lens manufacturing method, and plastic lens |
| DE102005062271B3 (en) * | 2005-12-24 | 2007-03-08 | Leoni Ag | Spray-coating method for producing printed circuits on car components comprises laser treatment of part of component surface to form textured area, ensuring that coating adheres only to untreated area |
| JP2020151938A (en) * | 2019-03-20 | 2020-09-24 | 株式会社リコー | Heat-sensitive recording medium, article, image formation method, and image formation device |
-
1985
- 1985-07-10 JP JP60150250A patent/JPS6213287A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5981647A (en) * | 1996-09-10 | 1999-11-09 | Daicel Chemical Industries, Ltd. | Resin composition for a white marking |
| EP2272917A1 (en) | 2001-01-22 | 2011-01-12 | Idemitsu Kosan Co., Ltd. | Polycarbonate resin compositions for laser marking and molded articles made thereof |
| WO2009037993A1 (en) | 2007-09-20 | 2009-03-26 | Japan Coloring Co., Ltd. | Oversheet for card |
| US9522516B2 (en) | 2007-09-20 | 2016-12-20 | Japan Coloring Co., Ltd. | Oversheet for card |
| JP2011103397A (en) * | 2009-11-11 | 2011-05-26 | Sharp Corp | Solar cell module assembly, method of manufacturing the same, and moving body |
| WO2012176533A1 (en) | 2011-06-21 | 2012-12-27 | 日本カラリング株式会社 | Sheet for card |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6213287A (en) | 1987-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |