JPH0480035A - Screen printing method to perforated substrate - Google Patents

Abstract

PURPOSE:To obviate the complicated adjustment of registration of printing on a printing table by a method wherein when an upper surface of a carrier of which a substrate is fixed comes to be of a horizontal state with an upper surface of a printing table, print processing is performed pushing an upper surface of a substrate side fringe onto the upper surface of the printing table so that a specific gap part is generated between an edge surface of the substrate side fringe and a presser component from a relation with the edge surface of the substrate side fringe. CONSTITUTION:A presser component 3, when upper surface 2a of a carrier 2 comes to be of a horizontal state with an upper surface 1a of a printing table, presses an upper surface 4a of a side fringe of a substrate M with its projected piece part 3b. However, at that time, a specific gap part S is made to be generated between a leg part 3a of the presser component 3 and a side fringe edge surface 4b of the substrate M. When print processing is ended, the substrate M fixed to a specific printing position of the printing table 1 together with rise transfer of the presser component 3 by pressing operation of the presser component 3. Meanwhile the carrier 2 returns in a printing position deciding process A direction, receives the next substrate M of which a printing position is specified with a receiving part (x), and rises to be transferred again.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the screen printing method for perforated substrates 22 for printed circuits.

"Three points between the prior art and the present invention" Conventionally, we have identified products in which electrical circuits are formed on both sides of a substrate, or products in which multiple substrates with circuits formed on two substrates are polymerized. Those used as electric circuit boards are widely known.

Therefore, these circuit boards have conductive pores in advance on both sides of the board and in order to conduct electricity from each board jump.
This is what is normally provided, and is called a so-called perforated substrate.

In the process of completing this type of board as a circuit board,
Although various forming means have been considered, generally a forming means is employed that involves a screen printing process in which a predetermined circuit pattern is printed on a substrate via a screen plate having a predetermined circuit pattern formed therein. In the screen printing process, the printing position of the substrate is adjusted before it is placed on the printing table.Furthermore, after the substrate is brought in, the printing position is adjusted so that it can resist the squinting pressure for printing the printing ink on the screen printing plate. 2. Must be fixed in place.

In the screen printing process for a substrate with holes, there are some restrictions on fixing the top surface of the printing table at a predetermined position, as well as adjusting the printing position in advance.

In other words, when fixing by negative pressure suction means that is generally widely used, it is necessary to consider a method to apply suction force while avoiding the conduction holes, and also to press the side edge of the substrate where there is no conduction hole onto the printing table. There are ways to fix it, but in the case of a board with holes, if a group of boards of the same kind whose pressing positions have been adjusted in advance contains a board with a large positional error around the board relative to the conductive hole that is the reference for forming the circuit pattern. There are a surprising number of cases, including those with large positional errors around these boards, and if we try to automatically process them, we will need a fixing means with a complicated automatic positioning function.
71! Encounter a complicated and troublesome problem.

"Means for Solving Problems" The present invention has been made in view of the state of the prior art, and it is possible to fix a predetermined printing position immediately before the printing table, and place the perforated substrate on the printing table. The substrate is fixed on a carrier that moves accurately for the stroke length to reach a predetermined printing position IF, and then the carrier is moved a predetermined stroke until the top surface of the carrier with the substrate fixed thereon is in a horizontal state ζ with the top surface of the printing table. , the upper surface of the board side edge of the holding member lever is pressed against the board 91i1! A means for solving the problem is to create a certain gap between the presser member and the end face of the t and perform the printing process while pressing against the top surface of the printing table.

"Operation" According to the present invention, the perforated substrate whose predetermined printing position has been identified is fixed to a carrier that is adjusted to move by the stroke to the printing position on the printing table, and is placed on the printing table in that state. Since it is carried in, there is no need to adjust the position on the printing table.
Fixing of the perforated substrate on the printing table is achieved by simply pressing the upper surface of the substrate sit with a presser member. In addition, in this case, the holding member presses the upper surface of the side edge of the board so that a certain gap is created in relation to the end face of the edge of the board 1, so that the periphery of the board with respect to the conduction hole in the board group of the same type is Even if something with a large positional error is mixed in, the presence of a gap between the holding member and the holding member will cause the holding member to collide with the end surface of the side edge of the board, continuously impeding the fixing action of the board. The situation will no longer occur.

"Example" Hereinafter, an example of the present invention will be described with reference to the drawings.

A predetermined printing position of the perforated substrate M having the conductive holes H is determined in a pre-processing process of the printing table l.

The substrate M that has been located at the predetermined printing position is placed on the printing table as it is! The carrying carrier 2 is designed to be able to reciprocate between the printing position determination step A, the printing table 1, and the next processing step aB, respectively. It consists of a part χ that receives the substrate M whose position has been specified in the process, and a part y that receives the printed board M on the printing table l.

When the part χ that picks up the substrate M in the printing position determination step A reaches the printing table 1, the part y that picks up the printed board on the printing table 1 goes to the next processing step B.

Further, the carrier 2 is precisely adjusted to move at least between the printing table 1 and the printing table 1 by a stroke from the printing position determination process A to the predetermined printing position on the printing table 1.

Therefore, after the perforated substrate N1 whose printing position has been specified is transferred to the carrier 2 in the printing position determination step A, it is automatically carried to the predetermined printing position on the printing table l by the movement of the carrier 2. That will happen.

The carrier 2 moves while fixing the located substrate M by an appropriate means, but this fixing means may be done by suctioning the part without the conduction hole H with a negative pressure suction means, or by sucking the part without the conduction hole H, or by sucking the part without the conduction hole H. It may depend on the way you wear it.

Carrier 2 reaches the predetermined printing position on printing table 1
In this case, the upper surface 2a of the carrier 2 is placed in a horizontal state with the upper surface 1a of the printing table l, but in this case, the carrier 2 that has received the substrate M whose position has been specified in the printing position determining step A is It moves upwards, and then moves in one direction on the printing table (see Figure 1@).
, carrier 2 reaches a predetermined position on printing table 1
moves downward there, and its upper surface 2a touches the printing table 1.
When it becomes horizontal with the upper surface 1a of the holder, the downward movement is stopped (see Fig. 2, 7).

When the top surfaces 1a and 2a of both 1 and 2 are in a horizontal state, the third presser foot t which is waiting moves toward the top surface 1a of the printing table 1, and eventually presses the side edge top surface 4a of the substrate plate 1, and prints. Board N1 is held between table top surface 1a by which lever.
(see Figure 2).

The holding member 3 is attached to a printing table l provided in a direction perpendicular to the traveling direction of the substrate M, that is, in the direction of the side edge surface 4b of the substrate M.
It is designed to move up and down with respect to the printing table 1 while being guided by a guide groove 5 .

In the figure, reference numeral 3a denotes a leg part which is a component of the presser member 3, which receives power from a power source (not shown in the figure), and which is attached to the printing table 1.
3b is a protruding piece that comes into contact with the upper surface 4a of the fM edge of the substrate M.

The movement of the holding member 3 is not limited to vertical movement (in the direction of the arrow in the figure) with respect to the printing table 1, but also movement on the side II# surface 4b of the substrate M.
It is also possible to move in any direction.

The movement of the substrate M in the direction of the side edge surface 4b is intended to cope with the handling of groups of different types of substrates, and once the substrate M has been positioned by -degree, the movement is not normally performed afterwards.

When the upper surface 2a of the carrier 2 is in a horizontal state with the upper surface 1a of the printing table, the pressing member 3
a is pressed by its protruding piece 3b, but at this time, the presser member 3
In other words, the leg portion 3a of the holding member and the 11m end surface 4 of the substrate M.
b, so that a certain gap S is formed between the two. Due to the existence of this gap S, even if there is a board of the same type that has a large positional error around the board M with respect to the conductive hole H, which is a reference for forming a circuit pattern, the holding member 3 and the periphery of the board As Motohi explains, it is possible to prevent an accident of collision with an object having a large positional error, and to prevent the occurrence of a situation in which the pressing operation of the substrate M against the side edge upper surface 4a is continuously obstructed.

In addition, by the pressing operation of the presser member 3, the printing table l
When the printing process is completed, the substrate N1 fixed at a predetermined printing position is immediately lifted above the printing table l by an appropriate means as the presser member 3 moves upward. While the substrate N1 is temporarily lifted, the carrier 2 returns to the direction in which the printing position determination process is entered, picks up the next substrate M whose printing position has been identified, and picks up the next substrate M whose printing position has been identified, and carries out the printing position determination process. Move upwards again. At this time, the receiving portion y of the printed substrate M of the carrier 2 returning from the next processing step B also moves upward at the same time to the upper part of the printing table 1, so that the printed substrate waiting above the printing table The substrate M is removed from the receiving portion y of the carrier, and is carried out from the printing table 1 by the movement of the carrier 2 in the direction of the next step B.

In the figure, 6 indicates the screen plate that moves up and down with respect to the upper surface 1a of the printing table l, and 7 indicates the screen plate 6.
The upper printing ink directs the squeegeeing member to print a predetermined circuit pattern on the substrate.

Note that the specification of the printing position on the substrate N1 according to predetermined printing conditions, the movement of the carrier 2, the movement of the presser member 3, and the operation of the screen plate 6 and the squeezing member 7 are all controlled. Equipment (not shown)
Of course, they are controlled in a predetermined order of operation in conjunction with respective power sources (not shown) via the respective power sources (not shown).

"Effects" Since the present invention is constructed as described above, the perforated substrate whose printing position has been secured is easily carried onto the printing table by the carrier that moves by a predetermined stroke. There is no longer any need for complicated printing positioning adjustments, and the fixing of the substrate on the printing table can now be done simply by applying unstable negative pressure suction means.

Further, according to the second aspect of the present invention, in the pressing operation of the holding member, a certain gap is created between the side edge end face of the board and the holding member. Even if there is a large positional error around the board with respect to the conductive hole, this will prevent the occurrence of situations such as printing position errors in the printing process caused by collision accidents between the holding member and the end face of the board. ! I (!!) will be the second thing that can be prevented.

[Brief explanation of the drawing]

Figures 1 and 2 show the relationship between the substrate that has arrived on the printing table due to the movement of the carrier and the holding member, and Figure 1 illustrates the state in which the carrier has arrived on the printing table. FIG. 2 also illustrates a state in which the substrate is fixed on a printing table. FIG. 3 is a schematic diagram illustrating the positional relationship between the printing table and other processing steps. l...printing table, la...printing table top surface, 2...carrier, 2a...carrier top surface, 3
... Pressing member, 3a, 3b, protrusion, 4a, upper surface of side edge of board 4b, end surface of side edge of board, 5... Guide groove, 6... Screen Edition, N1
... Perforated substrate, S... Gap part.

Claims (1)

[Claims] In the screen printing method for perforated substrates, in which the perforated board for printed circuits, whose printing position has been adjusted in the previous process, is carried onto the printing table and printed, the perforated board with the predetermined printing position determined just before the printing table is used. The substrate is fixed to a carrier that moves accurately by a stroke until it reaches a predetermined printing position on the printing table, and then the carrier is moved by a predetermined stroke so that the top surface of the carrier to which the substrate is fixed is parallel to the top surface of the printing table. When this occurs, print processing is performed while pressing the upper surface of this substrate side edge against the top surface of the printing table with a presser member so that a certain gap is created between the presser member and the end surface of the substrate side edge. A screen printing method for a perforated substrate, characterized in that: