JP5074886B2 - Screen printing machine - Google Patents

Screen printing machine Download PDF

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Publication number
JP5074886B2
JP5074886B2 JP2007282492A JP2007282492A JP5074886B2 JP 5074886 B2 JP5074886 B2 JP 5074886B2 JP 2007282492 A JP2007282492 A JP 2007282492A JP 2007282492 A JP2007282492 A JP 2007282492A JP 5074886 B2 JP5074886 B2 JP 5074886B2
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squeegee
screen
printing machine
screen printing
section
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JP2009107232A (en
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登 西
弘和 藤生
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Hitachi High Tech Instruments Co Ltd
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Hitachi High Tech Instruments Co Ltd
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  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Description

本発明は、スクリーン板上の塗布剤をスキージヘッドに取り付けられたスキージを移動させることにより、前記スクリーン板に開設された印刷パターン孔を介してプリント基板上に塗布するスクリーン印刷機に関する。   The present invention relates to a screen printing machine that applies a coating agent on a screen plate onto a printed circuit board by moving a squeegee attached to a squeegee head through print pattern holes provided in the screen plate.

この種のスクリーン印刷機は、例えば特許文献1などに開示されているが、前記スキージの移動方向側のこのスキージとスクリーン板との成す角度が鈍角となるように、各スキージは前記各スキージヘッドに取付けられている。そして、このように取付けることにより、印圧を小さくできるから、スキージの磨耗が少なくでき、しかもスクリーン板上の塗布剤との接触代が少ないから、スクリーンの移動の際の抵抗が小さく、スキージの移動速度を速めることができる。
特開平1−166961号公報
This type of screen printing machine is disclosed in, for example, Patent Document 1, but each squeegee has its obtuse angle so that each squeegee has an obtuse angle on the moving direction side of the squeegee. Installed on. And by attaching in this way, the printing pressure can be reduced, wear of the squeegee can be reduced, and the contact allowance with the coating agent on the screen plate is small, so the resistance when moving the screen is small, and the squeegee is The moving speed can be increased.
Japanese Patent Laid-Open No. 1-166961

しかしながら、スキージの移動速度を上げると、スクリーン板の印刷パターン孔への塗布剤の充填が不十分となる事態が発生し、不良プリント基板の生産を招く。   However, when the moving speed of the squeegee is increased, a situation occurs in which the coating pattern hole of the screen plate is not sufficiently filled with the coating agent, leading to production of a defective printed board.

そこで本発明は、スキージの移動速度を上げても、スクリーン板の印刷パターン孔への塗布剤の充填を十分に行えるスクリーン印刷機を提供することを目的とする。   Therefore, an object of the present invention is to provide a screen printing machine that can sufficiently fill a printing pattern hole of a screen plate with a coating agent even if the moving speed of a squeegee is increased.

このため第1の発明は、スクリーン板上の塗布剤をスキージヘッドに取り付けられた断面がほぼ長方形のスキージを移動させることにより、前記スクリーン板に開設された印刷パターン孔を介してプリント基板上に塗布するスクリーン印刷機において、前記スキージの移動方向側の角度であってこのスキージの移動方向側の前記断面の長辺と前記スクリーン板との成す角度が鈍角となるようにスキージを前記スキージヘッドに取付けると共に、前記スキージのスキージ移動方向側の前記断面の短辺が属する面の下部に前記塗布剤が入り込めるスペースを形成するように前記スキージの下部を下端まで切除したことを特徴とする。 For this reason, according to the first aspect of the present invention, the coating agent on the screen plate is moved on the printed circuit board through the printed pattern holes formed in the screen plate by moving the squeegee having a substantially rectangular cross section attached to the squeegee head. In the screen printing machine to be applied, the squeegee is placed on the squeegee head so that the angle between the long side of the cross section on the moving direction side of the squeegee and the screen plate is an obtuse angle. The lower part of the squeegee is cut off to the lower end so as to form a space in which the coating agent can enter in the lower part of the surface to which the short side of the cross section on the squeegee movement direction side of the squeegee belongs .

また第2の発明は、スクリーン板上の塗布剤をスキージヘッドに取り付けられた断面がほぼ長方形のスキージを移動させることにより、前記スクリーン板に開設された印刷パターン孔を介してプリント基板上に塗布するスクリーン印刷機において、前記スキージの移動方向側の角度であってこのスキージの移動方向側の前記断面の長辺と前記スクリーン板との成す角度が鈍角となるようにスキージを前記スキージヘッドに取付けると共に、前記スキージのスキージ移動方向側の前記断面の短辺が属する面の下部に前記塗布剤が入り込めるスペースを形成するように段差部を形成したことを特徴とする。 According to a second aspect of the present invention, the coating agent on the screen plate is applied to the printed circuit board through the printed pattern hole formed in the screen plate by moving the squeegee having a substantially rectangular cross section attached to the squeegee head. In this screen printing machine, the squeegee is attached to the squeegee head so that the angle formed by the long side of the cross section on the moving direction side of the squeegee and the screen plate is an obtuse angle. In addition, a step portion is formed so as to form a space in which the coating agent can enter at a lower portion of a surface to which a short side of the cross section on the squeegee moving direction side of the squeegee belongs .

第3の発明は、第1又は第2の発明において、前記スペースを形成する前記スキージの上面を前記スクリーン板と略平行となるように形成したことを特徴とする。 According to a third invention, in the first or second invention, an upper surface of the squeegee forming the space is formed so as to be substantially parallel to the screen plate.

本発明は、スキージの移動速度を上げても、スクリーン板の印刷パターン孔への塗布剤の充填を十分に行えるスクリーン印刷機を提供することができる。   The present invention can provide a screen printing machine capable of sufficiently filling a coating pattern hole of a screen plate with a coating agent even when the moving speed of a squeegee is increased.

以下図面に基づき、スクリーン印刷機について、説明する。図1は本発明の一実施形態であるスクリーン印刷機のスキージ機構の要部正面図、図2は左方のスキージが下降した状態のスクリーン印刷機のスキージ機構の正面図、図3は右のスキージが下降してスクリーンを介して印刷する場合の要部拡大図、図4は右のスキージによる印刷動作説明図である。   The screen printing machine will be described below with reference to the drawings. FIG. 1 is a front view of a main part of a squeegee mechanism of a screen printing machine according to an embodiment of the present invention, FIG. 2 is a front view of the squeegee mechanism of the screen printing machine in a state in which the left squeegee is lowered, and FIG. FIG. 4 is an explanatory view of a printing operation by the right squeegee when FIG.

本実施形態のスクリーン印刷機のスキージ機構を、図1及び図2において説明すると、1はスクリーンSを介して基板支持テーブル(図示せず)上に載置されたプリント基板上に印刷を行うスキージ機構であり、スクリーン印刷機にX軸方向(図1の左右方向)に移動可能に取り付けられたフレーム2を有している。このフレーム2には、各シリンダ4によりZ軸方向(図1の上下方向)に独立して移動する一対のスキージヘッド3が対向するように取り付けられている。この各スキージヘッド3の下部には、スクリーンS面に対して所定角度傾斜して支持されたスキージホルダー5が設けられ、このスキージホルダー5と押さえ板6との間にスキージホルダー5と図2のような平行に延びる扁平状(進退行方向側の側面の面積が下面より大きく、移動方向断面がほぼ長方形)のスキージ7が固定される。   The squeegee mechanism of the screen printing machine according to the present embodiment will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a squeegee that performs printing on a printed circuit board placed on a substrate support table (not shown) via the screen S. It is a mechanism and has a frame 2 attached to a screen printing machine so as to be movable in the X-axis direction (left-right direction in FIG. 1). A pair of squeegee heads 3 that are independently moved in the Z-axis direction (vertical direction in FIG. 1) by the cylinders 4 are attached to the frame 2 so as to face each other. At the bottom of each squeegee head 3 is provided a squeegee holder 5 supported at a predetermined angle with respect to the screen S surface, and between the squeegee holder 5 and the pressing plate 6, the squeegee holder 5 and FIG. A squeegee 7 having a flat shape (the area of the side surface on the advancing / retreating direction side is larger than the lower surface and the cross section in the moving direction is substantially rectangular) is fixed.

また、前記スクリーンSは、前記プリント基板の所望の回路パターンに対応して穿設された印刷パターン孔8Aが設けられたスクリーン板8と、該板8を囲む平面視矩形状のスクリーン枠9とから構成される。そして、スクリーン枠9は、スクリーン印刷機にX軸方向(図1の紙面と平行な方向)にモータ等の駆動手段(図示せず)によって、移動可能に取り付けられている。プリント基板は、搬送コンベア(図示せず)によって、印刷位置に配置された基板支持テーブル上に載置されると共に印刷終了後にこの基板支持テーブルから搬出される。   The screen S includes a screen plate 8 provided with a print pattern hole 8A formed corresponding to a desired circuit pattern of the printed circuit board, and a screen frame 9 having a rectangular shape in plan view surrounding the plate 8. Consists of The screen frame 9 is attached to the screen printing machine so as to be movable in the X-axis direction (direction parallel to the paper surface of FIG. 1) by driving means (not shown) such as a motor. The printed circuit board is placed on a substrate support table arranged at a printing position by a conveyor (not shown) and is unloaded from the substrate support table after printing is completed.

前記各スキージ7の移動方向側の角度であってこのスキージ7とスクリーン板8との成す角度が鈍角θとなるように、各スキージ7は前記各スキージヘッド3に取付けられている。即ち、図2のような扁平状のスキージの場合、断面が長方形の長辺とスクリーン板との成す角度が鈍角θとなるように、各スキージ7は前記各スキージヘッド3に取付けられている。   Each squeegee 7 is attached to each squeegee head 3 so that the angle formed by the squeegee 7 and the screen plate 8 is an obtuse angle θ. That is, in the case of a flat squeegee as shown in FIG. 2, each squeegee 7 is attached to each squeegee head 3 so that the angle formed by the long side of the rectangular section and the screen plate is an obtuse angle θ.

このように取付けることにより、印刷時においてスクリーン板8上の塗布剤であるクリーム半田Pとの接触代が少ないから、スキージ7が受ける上向きの圧力を小さくでき、この結果、印圧を小さくできるから、スキージ7の磨耗が少なくでき、しかもスクリーン板8上の塗布剤であるクリーム半田Pとの接触代が少ないから、スクリーン7の移動の際の抵抗が小さく、スクリーン板8の印刷パターン孔8Aへの充填が不十分となることなく、移動速度を速めることができる。しかしながら、よりスキージ7の移動速度を上げると、印刷パターン孔8Aへの充填が不十分となる事態が発生する。   By mounting in this way, there is little contact allowance with the cream solder P that is the coating agent on the screen plate 8 at the time of printing, so the upward pressure received by the squeegee 7 can be reduced, and as a result, the printing pressure can be reduced. Further, the wear of the squeegee 7 can be reduced, and the contact allowance with the cream solder P, which is the coating agent on the screen plate 8, is small. The moving speed can be increased without insufficient filling. However, when the moving speed of the squeegee 7 is further increased, a situation in which the filling of the print pattern holes 8A becomes insufficient occurs.

そこで、各スキージ7のスキージ移動方向側の面の下部にクリーム半田Pが入り込めるスペースSPを形成するように、各スキージ7の最下端部を切除して、このスキージ7の進行方向側のクリーム半田Pに対向する側面にはクリーム半田Pと接する面積が大きな面7Aと小さな面7Bとが形成されるように段差部7Cを形成する。この切除後の前記スペースSPを形成する上面7Dはスクリーン板8と略平行である。   Therefore, the bottom end of each squeegee 7 is cut out so that a space SP into which the cream solder P can enter is formed below the surface of each squeegee 7 on the squeegee movement direction side, and the cream solder on the traveling direction side of the squeegee 7 is cut out. A stepped portion 7C is formed on the side surface facing P so that a large surface 7A and a small surface 7B in contact with the cream solder P are formed. The upper surface 7D that forms the space SP after the excision is substantially parallel to the screen plate 8.

なお、本実施形態では、前記面積が大きな面7Aを上に、小さな面7Bを下に形成するように段差部7Cを形成したが、これに限らず、段差部7Cを形成する位置は必ずしも下部のみでなくともよい。従って、例えば小さな面を上に、大きな面を下に形成して、段差を上部に形成してスペースSPを増やしてもよい。   In the present embodiment, the step portion 7C is formed so that the large surface 7A is formed on the top and the small surface 7B is formed on the bottom. However, the present invention is not limited thereto, and the position where the step portion 7C is formed is not necessarily lower. Not only. Therefore, for example, the space SP may be increased by forming a small surface on the top and a large surface on the bottom and forming a step on the top.

以上の構成により、スクリーン印刷機のスキージ機構1の作用について説明すると、印刷工程において、まず、搬送コンベア(図示せず)によって基板支持テーブル上に搬送されてきたプリント基板とスクリーンSの位置合わせが行われた後、クリーム半田供給手段(図示せず)によってスクリーンS上にクリーム半田が供給される。   With the above configuration, the operation of the squeegee mechanism 1 of the screen printing machine will be described. In the printing process, first, the alignment of the printed circuit board and the screen S, which have been transported onto the substrate support table by the transport conveyor (not shown), is performed. After being performed, cream solder is supplied onto the screen S by cream solder supply means (not shown).

そして、図2に示すように、左のシリンダ4の駆動により左のスキージヘッド3が下降し、スキージ機構10全体が右方向に移動し、左のスキージ7がスクリーンS上のクリーム半田Pを掃引して、スクリーン板8の印刷パターン孔8Aを介してプリント基板上にクリーム半田Pを印刷する。また、これとは逆に、右のシリンダ4の駆動により右のスキージヘッド3が下降し、スキージ機構10全体が左方向に移動し、右のスキージ7がスクリーンS上のクリーム半田Pを掃引して、スクリーン板8の印刷パターン孔8Aを介してプリント基板上にクリーム半田Pを印刷することもできる。   Then, as shown in FIG. 2, the left squeegee head 3 is lowered by driving the left cylinder 4, the entire squeegee mechanism 10 is moved in the right direction, and the left squeegee 7 sweeps the cream solder P on the screen S. Then, the solder paste P is printed on the printed circuit board through the printing pattern holes 8A of the screen board 8. On the contrary, the right squeegee head 3 is lowered by driving the right cylinder 4, the entire squeegee mechanism 10 is moved to the left, and the right squeegee 7 sweeps the cream solder P on the screen S. Thus, the cream solder P can be printed on the printed circuit board through the printing pattern holes 8A of the screen plate 8.

そして、右のスキージ7の左方向に移動することによる印刷動作について、図3及び図4に基づき説明する。先ず、スキージ7が左方向に移動して、最上段の図4の(A)の状態から図4の(B)に示すように移動すると、スキージ7によりスクリーン板8の印刷パターン孔8Aの先端部からクリーム半田Pが充填し始める。   The printing operation by moving the right squeegee 7 in the left direction will be described with reference to FIGS. First, when the squeegee 7 moves to the left and moves from the state shown in FIG. 4A to the position shown in FIG. 4B, the tip of the print pattern hole 8A of the screen plate 8 is moved by the squeegee 7. Cream solder P begins to fill from the part.

そして、スキージ7が上段から3番目の図4の(C)の位置に到達したときには、印刷パターン孔8Aにはクリーム半田Pがほとんど充填し終えることとなる。しかし、スキージ7を高速度で移動させた場合には、印刷パターン孔8Aにクリーム半田Pが充填し切れていない部分が発生する事態が発生し易いが、スペースSP内に入り込んでいるクリーム半田Pをスキージ7の上面7Dが下方へ押圧するように作用しながら(4段目の図4の(D)参照)、スキージ7が移動することとなる。   When the squeegee 7 reaches the third position (C) of FIG. 4 from the top, the printed pattern hole 8A is almost completely filled with the cream solder P. However, when the squeegee 7 is moved at a high speed, there is a tendency that a portion where the printed pattern hole 8A is not completely filled with the cream solder P is likely to occur, but the cream solder P entering the space SP is likely to occur. The squeegee 7 moves while acting so that the upper surface 7D of the squeegee 7 presses downward (see FIG. 4D of the fourth stage).

従って、印刷パターン孔8Aにスキージ7の大きな面7Aでクリーム半田Pを充填させ、次いでクリーム半田Pが充填し切れていない部分が発生しても、小さな7Bと上面7Dとで、その後漏れなく確実に充填することができる。   Therefore, even if the printed pattern hole 8A is filled with the cream solder P by the large surface 7A of the squeegee 7 and then the portion where the cream solder P is not completely filled occurs, the small 7B and the upper surface 7D are surely prevented from leaking thereafter. Can be filled.

そして、5段目の図4の(E)に示すように、スキージ7が印刷パターン孔8Aを通過して、当該印刷パターン孔8Aへのクリーム半田Pの充填を終える。更に、スキージ7が左方向へ移動して、その後左のシリンダ4の駆動により左のスキージヘッド3が上昇して、印刷動作が終了する。   Then, as shown in FIG. 4E in the fifth stage, the squeegee 7 passes through the print pattern hole 8A, and the filling of the cream solder P into the print pattern hole 8A is completed. Furthermore, the squeegee 7 moves to the left, and then the left squeegee head 3 is raised by driving the left cylinder 4 to complete the printing operation.

以上のように本発明の実施態様について説明したが、上述の説明に基づいて当業者にとって種々の代替例、修正又は変形が可能であり、本発明はその趣旨を逸脱しない範囲で前述の種々の代替例、修正又は変形を包含するものである。   Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

スクリーン印刷機のスキージ機構の要部正面図である。It is a principal part front view of the squeegee mechanism of a screen printing machine. 左方のスキージが下降した状態のスクリーン印刷機のスキージ機構の正面図である。It is a front view of the squeegee mechanism of the screen printing machine in a state where the left squeegee is lowered. 右のスキージが下降してスクリーンを介して印刷する場合の要部拡大図である。It is a principal part enlarged view in case the right squeegee descends and it prints via a screen. 右のスキージによる印刷動作説明図である。It is explanatory drawing of printing operation by the right squeegee.

符号の説明Explanation of symbols

1 スキージ機構
3 スキージヘッド
5 スキージホルダー
7 スキージ
7A 大きな面
7B 小さな面
7C 段差部
7D 上面
8 スクリーン板
8A 印刷パターン孔
10 スキージ機構
P クリーム半田
S スクリーン
SP スペース
DESCRIPTION OF SYMBOLS 1 Squeegee mechanism 3 Squeegee head 5 Squeegee holder 7 Squeegee 7A Large surface 7B Small surface 7C Step part 7D Top surface 8 Screen board 8A Print pattern hole 10 Squeegee mechanism P Cream solder S Screen SP space

Claims (3)

スクリーン板上の塗布剤をスキージヘッドに取り付けられた断面がほぼ長方形のスキージを移動させることにより、前記スクリーン板に開設された印刷パターン孔を介してプリント基板上に塗布するスクリーン印刷機において、前記スキージの移動方向側の角度であってこのスキージの移動方向側の前記断面の長辺と前記スクリーン板との成す角度が鈍角となるようにスキージを前記スキージヘッドに取付けると共に、前記スキージのスキージ移動方向側の前記断面の短辺が属する面の下部に前記塗布剤が入り込めるスペースを形成するように前記スキージの下部を下端まで切除したことを特徴とするスクリーン印刷機。 In a screen printing machine that applies a coating agent on a screen board to a printed circuit board through a printing pattern hole provided in the screen board by moving a squeegee having a substantially rectangular cross section attached to the squeegee head. The squeegee is attached to the squeegee head so that the angle formed by the long side of the cross section on the moving direction side of the squeegee and the screen plate is an obtuse angle, and the squeegee is moved by the squeegee. A screen printing machine, wherein a lower portion of the squeegee is cut off to a lower end so as to form a space for the coating agent to enter in a lower portion of a surface to which a short side of the cross section on a direction side belongs . スクリーン板上の塗布剤をスキージヘッドに取り付けられた断面がほぼ長方形のスキージを移動させることにより、前記スクリーン板に開設された印刷パターン孔を介してプリント基板上に塗布するスクリーン印刷機において、前記スキージの移動方向側の角度であってこのスキージの移動方向側の前記断面の長辺と前記スクリーン板との成す角度が鈍角となるようにスキージを前記スキージヘッドに取付けると共に、前記スキージのスキージ移動方向側の前記断面の短辺が属する面の下部に前記塗布剤が入り込めるスペースを形成するように段差部を形成したことを特徴とするスクリーン印刷機。 In a screen printing machine that applies a coating agent on a screen board to a printed circuit board through a printing pattern hole provided in the screen board by moving a squeegee having a substantially rectangular cross section attached to the squeegee head. The squeegee is attached to the squeegee head so that the angle formed by the long side of the cross section on the moving direction side of the squeegee and the screen plate is an obtuse angle, and the squeegee is moved by the squeegee. A screen printing machine characterized in that a step portion is formed so as to form a space in which the coating agent can enter at a lower portion of a surface to which a short side of the cross section on the direction side belongs . 前記スペースを形成する前記スキージの上面を前記スクリーン板と略平行となるように形成したことを特徴とする請求項1又は請求項2に記載のスクリーン印刷機。The screen printing machine according to claim 1, wherein an upper surface of the squeegee forming the space is formed so as to be substantially parallel to the screen plate.
JP2007282492A 2007-10-30 2007-10-30 Screen printing machine Active JP5074886B2 (en)

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JP5058008B2 (en) * 2008-01-31 2012-10-24 株式会社日立ハイテクインスツルメンツ Screen printing machine

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JP2554385B2 (en) * 1990-05-07 1996-11-13 東芝機械株式会社 Squeegee device
JPH0628957B2 (en) * 1990-09-04 1994-04-20 東芝機械株式会社 Squeegee device for screen printing machine
JPH1120128A (en) * 1997-07-02 1999-01-26 Juki Corp Cream solder printer
JP3468133B2 (en) * 1998-12-07 2003-11-17 松下電器産業株式会社 Screen printing squeegee and screen printing device
JP2004130735A (en) * 2002-10-11 2004-04-30 Kimio Ito Squeegee for screen printing

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