JP2696066B2 - Screen printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing apparatus for mounting a solder paste or the like on a predetermined position by screen printing before an electronic component is mounted on an electronic circuit board.

[0002]

In recent years, advances have higher definition of the conductor line, the printed circuit board of the screen printing of electronic circuits on a substrate as a screen and the substrate (hereinafter, P- plate abbreviated) of the printing
The gap type in which a gap is provided between the surface and the surface is mainly used. In gap-type screen printing (hereinafter abbreviated as gap printing), contact / separation (contact / separation) between a squeegee, which is a main component of a squeegee device, and the screen plate, and connection between the P-plate and the screen plate. The contact and separation are the main factors that determine the printing result. However, specific and effective way how for these various factors that continues to trial and error without being Heading is conventional.

[0003]

In THE INVENTION Problems to be Solved] gap printing, in the vicinity immediately below the squeegee is slid through the screen plate upper surface, the screen layout paper surface and the P- plate top surface along the printing direction between the two blades contact over a width of about distances, lower surface of the screen plate with the movement of the squeegee device the P-
Go away from the top of the board.

[0004] In this way, plate separation, which means the separation of the screen version and P- plate (hereinafter, plate releasing the abbreviation) In,
The screen layout paper surface and P- plate on with the movement of the squeegee
A change in the contact angle with the surface (hereinafter, abbreviated as a contact angle) changes the speed of the separation of the printing plate, resulting in uneven printing or limiting the definition of a pattern to be printed. I was

[0005] The present invention has been made in view of the above problems, to have a mechanism to reduce the change in contact angle when the plate separating the screen plate located towards the back along the printing direction of the squeegee device The present invention provides a screen printing apparatus having the above configuration.

[0006]

In order to solve the above-mentioned problems, a screen printing apparatus according to the present invention first comprises a squeegee, which is a main component of a squeegee apparatus having a housing structure, and has a left and right direction in the width direction. A pair of auxiliary side walls are provided on the side of the P-plate holding base or on the outer side of the side, and a leveling base for maintaining horizontality for plate alignment between the screen and the P-plate. Pressure applied to each upper surface (hereinafter abbreviated as "press")
The one that adjusts is used.

[0007] Next, a screen printing apparatus according to the invention, in order to perform the plate separating between the screen plate and the P- plate smoothly, Fit take rotatable roller in front of or behind the squeegee.

[0008] Subsequently, certain brute screen printing apparatus of the present invention, the screen layout paper surface behind the squeegee device P
- in order to adjust the contact angle between the plate top face, provided with means for frying supported or pressed against the screen plate in the aft.

Incidentally, among the terms of the present invention used so far and also used hereinafter, the housing and the side wall of the squeegee device and the squeegee and the auxiliary side wall thereof, and the squeegee, one before and after the other, constitute two pairs. The concept, meaning, and configuration of the blade and the like are the same as or similar to those found in the literature (Japanese Patent Application No. 5-39222).

[0010]

In the screen printing apparatus according to the present invention, the auxiliary side wall of the squeegee device adjusts the pressing on the side of the P-plate and each upper surface of the leveling base to form the squeegee. The pressure of a pair of blades (particularly, a rear blade serving as a squeegee) disposed on the screen plate can be adjusted.

[0011] Next, a rotatable roller provided in front of the squeegee for pressing the upper surface of the P-plate through the screen plate in front of the squeegee, and an upper surface of the screen plate behind the squeegee are provided. A rotatable roller provided at the back of the squeegee so that the lower surface of the screen plate does not touch the printing material mounted on the printed circuit board while being pressed against, adjusts the contact angle and speeds up the separation of the plate. It can play an auxiliary role to make the adjustment of the height easier or smoother.

[0012] Subsequently, to hold the screen plate the upper surface of the portion other than the image pattern as a squeegee behind the screen plate pressing a main part related to the detaching, attached to squeegee the auxiliary side walls, the screen plate is protruded to the rear plate With such a configuration that the pressure and the contact angle with the plate are adjusted, the above-mentioned separation speed of the plate can be adjusted.

Further, in order to support and raise the screen plate in a portion other than the image pattern, a lifting plate is inserted into a slit provided in a width direction side portion of the screen plate along a printing direction. The entire screen plate behind the squeegee is lifted from the printed circuit board , and the above-mentioned contact angle or plate separation speed is adjusted.

Furthermore Subsequently, the U-shaped groove provided along the printing direction on each side portion upper surface of the supporter and leveling base, left and right ends of the isosceles portion pillars height greater than the depth of the groove a separate component, the squeegee of its length is fitted those constructed integrally with the Π-shaped as 支揚 bar length greater than narrow image pattern occupancy than the width of the screen plate, along a printing direction By being configured to move in synchronization with the movement of the apparatus and without rubbing by touching the printing material on the upper surface of the screen plate , the plate separation speed can be adjusted evenly from the beginning to the end of printing. It is.

[0015]

EXAMPLES Hereinafter, with reference to the drawings real 施例of the present invention. In Figure 1, reference numeral 1 is a holder of the P- plate,
Reference numeral 2 denotes an upper surface of the P-plate placed on the holding table 1 and 3R and
3L (R indicates the right side, L indicates the left side, the same applies hereinafter) indicates the upper surface of the side in the width direction of the holding base 2 , 4 indicates the screen plate, and 5 indicates the screen plate.
Denotes a squeegee device, 6 denotes a contact surface where a pair of front and rear blades of the squeegee device 5 comes into contact with the upper surface of the screen plate 4 , 7R and
And 7L are the skis arranged on the left and right sides of the squeegee device 5.
The auxiliary side wall and P denote a printing direction perpendicular to the paper surface. That is, in the embodiment corresponding to claim 1 as a whole,
The same depth as the thickness of the printed circuit board as the printing material and
The same width as the width that is perpendicular to the printing direction of the printed circuit board
A holding table 1 having a U-shaped groove formed on the upper surface thereof;
Approaching and separating the screen plate 4 placed on the surface in parallel in the width direction
Squeegee device 5 having a pair of front and rear squeegee blades
A pair of left and right squeegee auxiliary side walls 7R, 7L for holding the
The front of the holding table 1 with respect to the upper surface in the width direction side portions 3R and 3L.
The screen plate on the lower surface of the squeegee auxiliary side walls 7R and 7L
4 for adjusting the pressing force via
Omitted) and a gap type screen printing device
A configuration capable of adjusting the pressing of the squeegee auxiliary side walls 7R and 7L against the side of the P-plate to substantially adjust the contact angle of the squeegee blade with the screen plate 4 has a surface perpendicular to the printing direction. It is principal part sectional drawing seen from. However, the pressing adjustment means and the like may be performed by a known means (for example, an air cylinder) for suspending the squeegee device, and the illustration thereof is omitted.

FIG. 2 shows another embodiment similar to that of FIG. 1, except that reference numeral 8 denotes a level base located on the outside of the side of the holding table. Is exactly the same as However, the primes 4 'to 7' are added to distinguish them from FIG. That is, as a whole,
Perpendicular to the printing direction of the printed circuit board
Holding a U-shaped groove on the top surface with the same width as the desired width
The table 1 and the outer side of the width side of the holding table 1 and the upper surface thereof
Is substantially in the same plane as the printing surface 2 of the printed circuit board.
A pair of left and right rail-shaped level bases 8R and 8L,
The screen plate 4 'placed on the upper surface of the support 1
A pair of front and rear squeegee blades
A pair of left and right squeegee auxiliary side walls for holding the keying device 5 '
7'R, 7'L and the upper surface of the leveling bases 8R, 8L
Of the lower surfaces of the squeegee auxiliary side walls 7'R and 7'L
A pressure adjusting hand capable of adjusting the pressure via the clean plate 4 '
And a gap type screen printing apparatus comprising:
You. However, the means for adjusting the pressure suspends the squeegee device
By known means (for example, air cylinder)
The illustration of the spider is omitted.

FIG. 3 shows an embodiment having a purpose slightly different from those of the preceding two figures, and corresponds to claim 3. Approximately the same length of the roller reference numeral 9 a rotatable screen width adding pressing the P- plate upper surface 2 via the screen plate 4 is provided in front of the scan <br/> Chigi device in FIG, 10 Roller 9 and connecting rod
T, and the roller 9 is connected to the screen plate
Disk to slide over the surface prior to printing in order to smooth
A means for adjusting the pressure on the upper surface of the lean plate 4 (for example, T
(A drive motor for expanding and contracting the length of the squeegee) and means for adjusting the screen pressure by a roller 9 attached to the front wall of the squeegee device 5 , and the meanings of other symbols are exactly the same as those in the previous two figures. However, the entirety is a cross-sectional view of a main part viewed from a printing direction P indicated by an arrow and a direction perpendicular to the paper surface, that is, a cross section of the squeegee device 5 .

FIG. 4 shows an embodiment slightly different from FIG. 3 and corresponds to claim 4. Reference numeral 11 while pressed against the upper surface of the screen plate 4 of the rear squeegee device 5 for adjusting the plate separation after printing in the figure, the printing lower surface of the screen plate 4 which is rests on the upper surface P- plate so as not to touch the timber, about the same length of the roller and rotatable in a screen width provided in the printing direction rear side of the squeegee device 5, 12 the roller 1
The same adjustment means and before Figure 3 by connecting one can adjust the pressure on the screen plate the upper surface of the roller 11, each represent, meaning other code is exactly the same as that of the previous Figure 3. However, the screen plate 4 and the upper surface of the P-plate 2 are main part sectional views viewed from the same direction as in FIG. 3, with a gap provided before and after the squeegee away from the plate. In addition,
The illustration of the support frame for supporting the screen plate 4 is omitted.

[0019] Figure 5, in the embodiment of the Purport and 4, claim
Corresponds to 5. In the figure, reference numeral 13 denotes the rear side of the printing direction P.
Via the communication Yuibo T to the lower side wall 6 of the squeegee device 4 at the
Preparative Te Ri attached, sliding contact with the screen plate to圧梓the left and right ends of the non-image pattern to be inner printing screen plate on surface
And warp it to mark on the bottom surface of the screen plate.
A press-contact plate that is lifted from the P-plate upper surface 2 so that the printing material does not touch it . Length adjustment drive motors, etc. T as a pressing of the adjusting means are also lower sidewall 6 is attached to the side wall of the squeegee device 5, its illustration is abbreviated saving (hereinafter, the same). The other reference numerals are exactly the same as those in the previous figures.
FIG. 5 is a sectional view of a main part configuration viewed from the same direction as that of FIG. 4.

FIG. 6 shows an embodiment in which the speed of plate separation can be more positively adjusted than that of the above-described embodiment .
You. Reference numeral 14 in A of FIG. 6, under the squeegee device 5
Attached via the adjusting means T to the section side wall 6, of the upper surface of the screen plate 4 has a left and right end portions of the non-image pattern
The printing plate placed on the P-plate is raised and the screen plate 4
In order to support and raise the screen plate 4 behind the squeegee device 5 so that the lower surface of the squeegee device 5 does not touch, of the upper surface shown in FIG.
The support plate is inserted through a slit S provided on a side portion near the holding frame F, and may have a wedge shape or a round bar shape as illustrated. Reference numeral 4B indicates that a slit S is formed on the screen plate.
Is distinguished from the screen version described above . FIG. 6A is also a cross-sectional view of a main part configuration viewed from the same direction as in FIGS.

[0021] Figure 7, in the embodiment of the Purport and 6, claim
7 and 8. In the figure, reference numeral 15 denotes a Π-shaped body,
Reference numeral 15 'denotes a T-shaped body, both of which are screen plates 8
4 represents a Π-shaped body having the same arrangement and purpose as in FIG. 6 throughout the width direction. Structure <br/> forming a Π-shaped body 15, the screen plate and the length of the bar is greater than the image pattern occupancy width narrower than the width of 4, the bar substrate supporting table 1 or leveling base attached to the left and right end portions of the 8 and a pillar having a height greater than the depth of a U-shaped groove provided along the printing direction on each upper surface is integrally formed in a Π shape. With the above pedestal height
The relationship with the depth of the U-shaped groove satisfies the following expression. H (H ′) − h (h ′) = D (D ′) (1) D (D ′)> d (d ′) (2) where H is the height of the pillar, and h is the U-shaped groove. , D is the difference,
d represents what the guideline maximum value of the height of the printing material to be deposited placing on P- plate, respectively. The prime in both equations corresponds to the case of FIG. The meaning of other symbols is shown in FIG.
(A, B), which are the same as those described above in common with FIG.
The priming of 3, 8 corresponds to the provision of grooves. Note that reference numerals a, b and a 'and a',
The meaning of b 'will be described later .

The Π - shaped body 15 configured as described above is
The squeegee device 5 is inserted into each of the above-mentioned grooves and moved in the above-mentioned grooves in synchronization with the movement of the squeegee device 5 in the printing direction by means of known driving and control .
The screen plate 4 behind the squeegee device 5 is always lifted away from the P-plate upper surface 2 during the movement of the squeegee device 5 without causing any trouble such that the lower surface touches the printing material on the upper surface of the P- plate and rubs. Reduces uneven plate separation speed.

In addition to the above embodiments, various configurations and structures are allowed without departing from the gist of the present invention, and are not particularly limited to the drawings of the above embodiments. For example, reference numerals a and b and a 'and b' in FIGS. 7B and 8 denote cutting lines for removing a bar at the center of the Π-shaped body 15 , and as a result, a pair of left and right T- shaped bodies
Since 15 'and 15' are synchronized with each other and can perform the same function as the Π-shaped body 15 , this is effective when the P-plate is relatively narrow. Thus, this embodiment is
This corresponds to item 9.

[0024]

As will be easily understood from the above description, the present invention has the following effects in screen printing.

In the squeegee device having the housing structure, the lower surface of the squeegee auxiliary side wall presses the side of the P-plate holding base and the upper surface of the leveling base provided outside the side, thereby providing: Effectively, the pressing of the squeegee blade against the screen is adjusted, and as a result, the plate separation speed which affects the printing result can be adjusted.

A rotatable roller attached to the front of the squeegee device having the same structure as described above smoothes the warpage and unevenness of the screen plate and indirectly facilitates the control of the plate separation speed.

Further, at the rear of the squeegee device having the same structure, a roller rotatable over the entire length of the screen, or a pressure plate at a side portion of the screen plate other than the image pattern is provided. of being pressed against the upper surface of the screen plate at the back is adjusted the pressing so as not to touch the printing material of the upper surface of the lower face width P- plate, can be adjusted plate release speed as a result.

Then, a screen behind the squeegee device
Connecting plate and base frying support left and right ends at a portion other than the image pattern <br/> rather, the squeegee auxiliary sidewalls支揚plate inserted from the slit provided in the width direction of the left and right sides of the screen plate by providing the squeegee device rear and, during movement along the printing direction of the squeegee device, always the screen plate is passed over the surface of the P- plate with a constant contact angle, as a result, plate releasing rate the can be adjusted to almost constant.

Further, a bar having a length smaller than the width of the screen plate and larger than the occupied width of the image pattern is provided on the left and right ends of the bar, and on the upper surface of the left and right sides of the holding base of the P-plate or the leveling base outside thereof. A pillar having a height greater than the depth of the U-shaped groove formed along the printing direction is integrally formed so as to form a Π -shape as a whole, and the groove serves as a guide in the printing direction. by frying support screen plate aft conjunction from the rear of the squeegee device is fitted to the pedestal the groove in synchronization with the movement of the device, just above (

[0028] As in the case of), it is possible to substantially uniformly adjust the plate release speed from the start point of the print up to the end point, in which the image quality of the finally P- plate printing plate making can be improved is there. still,

The same applies to the description at the end of the above.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a screen printing apparatus according to a first embodiment of the present invention .

FIG. 2 is a longitudinal sectional view of a main part of a screen printing apparatus according to a second embodiment of the present invention .

FIG. 3 is a longitudinal sectional view showing a main part of a screen printing apparatus according to a third embodiment of the present invention .

FIG. 4 is a longitudinal sectional view showing a main part of a screen printing apparatus according to a fourth embodiment of the present invention .

FIG. 5 is a longitudinal sectional view showing a main part of a screen printing apparatus according to a fifth embodiment of the present invention .

FIG. 6 is a longitudinal sectional view (A) showing a main part of a sixth embodiment of the screen printing apparatus according to the present invention, and the screen shown in FIG.
Plan view of plate (B)

FIG. 7 is a longitudinal sectional view (A) showing a main part of a screen printing apparatus according to a seventh embodiment of the present invention, and a side view thereof .
(B)

FIG. 8 is a side view similar to FIG. 7B , showing an eighth embodiment of the screen printing apparatus according to the present invention;

[Description of Signs ] 1, 1 ' ... Holder 2 ... Printing surface 3, 3' ... Width side upper surface 4, 4 '... Screen plate 5, 5' ... Squeegee device 6, 6 '... Lower side wall 7 , 7 '... squeegee auxiliary side walls 8, 8' ... level base upper surface 9, 11 ... rollers 10, 12 ... adjusting means 13 ... press-contact plate 14 ... support plate 15 ... Π-shaped body 15 '... T-shaped body

Claims (9)

(57) [Claims] 1. A holding stand a U-shaped groove of the same width as the width formed on the upper surface of the same depth and the printing direction perpendicular to the direction of the printed circuit board the thickness of the printed circuit board as the substrate, the
Parallel to the screen plate placed on the upper surface of Matamajidai in the width direction
Ski consisting of a pair of front and rear blades pressed against the top from above
Housing-type squeegee device having a squeegee, and the squeegee device
A pair of left and right squeegee auxiliary side walls for holding the device, and pressing adjustment means capable of adjusting pressing of the lower surface of the squeegee auxiliary side wall on the upper surface of the width direction side portion of the holding base via the screen. Screen printing device in gap type screen printing . 2. A U-shaped groove having the same width as the width that is perpendicular to the printing direction of a printed circuit board as an object to be printed is formed on the upper surface.
And the holder was approximately left right pair of rails like leveling base <br/> Ru Ah in the same plane the upper surface and the printing surface of the printed circuit board be outside the width direction sides of the holder And on the holding table
Parallel to the screen plate placed on the surface in the width direction
Housing with squeegee consisting of a pair of front and rear blades
-Type squeegee device and left and right holding the squeegee device
A screen printing apparatus for gap-type screen printing, comprising: a pair of squeegee auxiliary side walls; and a pressing adjustment means capable of adjusting pressing of the lower surface of the squeegee auxiliary side wall on the upper surface of the leveling base via the screen plate. . 3. A rotatable rotation device having pressure contact pressure adjusting means for press-contacting the screen plate with the screen plate and having substantially the same length as the width of the screen plate in a direction perpendicular to the printing direction and having a rotation axis in the width direction. 2. A squeegee device according to claim 1, wherein a roller is provided in front of the squeegee device in the printing direction so as to press the printing surface of the printed circuit board through the screen plate along the printing direction.
Or the screen printing device according to 2 . 4. A rotatable rotatable device having pressure contact pressure adjusting means for press-contacting the screen plate with the screen plate and having a rotation axis in the width direction, the length being substantially the same as the width of the screen plate perpendicular to the printing direction. Rollers are pressed against the upper surface of the screen plate along the printing direction, and the lower surface of the screen plate is warped upward so as not to come into contact with the printing material mounted on the printing surface of the printed circuit board. The squeegee device sign
Screen indicia <br/> printing apparatus according to claim 1 or 2, wherein setting digit in the printing direction rear side. In 5. A top <br/> portions other than the image pattern of the screen plate, pressing plate capable of pressing right and left ends of the width direction, which is the printing direction perpendicular to the direction, backward along the printing direction the comprise adjusting means capable of adjusting the contact angle between the length and the screen plate's upper projecting squeegee device or the lower sidewall thereof
Provided, upwardly pressed against the upper surface of the screen plate
By returning warp, the screen printing apparatus of the請<br/> Motomeko 1 or 2, wherein prevents contact between the printing material that is rests on the printed face of the screen layout paper surface and the printed circuit board. In the lower surface <br/> portion other than the image pattern wherein screen plate, 支揚plate frying supporting the right and left ends of the width direction, which is the printing direction perpendicular to the direction, before the rear of the scan Chigi device
Serial connected to the squeegee device or squeegee auxiliary side wall, is inserted from the slit formed along the printing direction of advance the screen plate width direction side portion, below said screen plate
Press the screen plate up from the printed circuit board
The screen plate bottom surface and front
Prevents contact with printing material placed on printed circuit board
Screen printing apparatus according to claim 1 or 2, wherein that. 7. A bar having a U-shaped groove formed along the printing direction on the upper surface of the side in the width direction of the holding table , and having a length smaller than the width of the screen plate and larger than the occupation width of the image pattern , and the left and right ends of the bar. A Π - shaped body attached to a portion and integrally formed with a pillar having a height greater than the depth of the U-shaped groove forms a screen plate behind the squeegee device along the printing direction.
As support fried Ru支揚bar from the printed circuit board, the
And the pedestal so that the U-shaped groove as a guide is fitted in the groove, in synchronism with the movement of the squeegee device along a printing direction, in contact with the printing material placed on the upper surface of the screen plate The screen printing apparatus according to claim 1, wherein the lifting bar moves along the printing direction without rubbing . 8. A bar having a U-shaped groove provided along the printing direction on the upper surface of the width side of the leveling base , the bar having a length smaller than the width of the screen plate and larger than the width occupied by the image pattern; attached to an end portion, said U-shaped groove depth and pedestal having a larger height Π-shape is formed integrally shaped body is, the screen plate behind the squeegee device along a printing direction <br/> as the print支揚bar from the substrate Ru fried supported by as the pedestal to the upper <br/> Symbol U-shaped groove is a guide is fitted into the groove, the movement and synchronization of the squeegee device along a printing direction to, without scraping contact with the printing material placed on the upper surface of the screen plate, screen printing apparatus according to claim 1, wherein said 支揚 bar is configured to move along the print direction. 9. Remove the only bar central portion in the Π-shaped shaped body
The pair of right and left sides of the T -shaped body according to claim 7 or 8, wherein the pair of left and right sides can work in cooperation with each other like the Π - shaped body .
Screen printing device .