JPS5871691A - Method of positioning porous substrate in screen printing process - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for positioning a perforated substrate in screen printing, which safely and reliably positions a continuously and automatically transferred perforated substrate at a predetermined position to be printed on a printing table. Regarding. Conventionally, so-called perforated substrates have been used, in which a predetermined pattern of printed circuits is formed on the front and back sides of one or more substrates, and these circuit surfaces are communicated using through holes drilled in the substrate. The existence of multilayer printed circuit boards is widely known, and the printed circuits formed on multiple sides of this perforated board require accurate correspondence, and this is due to the number of holes on the printing table during printing. Careful attention must be paid to the positioning of empty boards. Various methods can be considered for positioning this perforated substrate, but in general, a through hole for positioning is bored at a specific position of the perforated substrate, and a certain relationship with this through hole is established. Generally, the printing position is determined by providing positioning pins on the printing table and fitting them together.

The positioning holes provided in this perforated substrate are normally specified uniformly for each corresponding number of sheets, keeping a certain positional relationship and distance relationship with the points of the side edges as opposites. Suppose that among the substrates that have been uniformly processed, there are some that have deformed side edges that are supposed to be opposites.

The positioning holes provided in this deformed hole-filled substrate can no longer match the positioning pins of the printing table provided on the basis of the normal substrate, and positioning for printing on the printing table cannot be realized. . If the appearance of deformed substrates in various forms is unavoidable in the industry that handles perforated substrates, countermeasures are urgently needed for printing on perforated substrates, and should be resolved by those skilled in the art. This is a major technical challenge.

The present invention is an attempt to eliminate such drawbacks seen in the prior art, and the present invention aims to solve this problem by attaching a perforated substrate temporarily positioned at a predetermined printing position on the printing table in the direction of movement and on the sides thereof. A pair of specific holes drilled in multiple sets and a pair of guide pins provided on the printing table so that the pair of specific holes correspond to each other in the same positional relationship and distance relationship are used to perform the final printing process. If necessary for positioning.

A method in which the pilot pin and the fixing pin that make up the pair of guide pins have different functions.

The temporary positioning of the perforated substrate on the printing table can be safely and finally changed to the final positioning.

The aim is to ensure the transition.

The following 9 points are related to the method for positioning a perforated substrate according to the present invention.
This will be explained with reference to the drawings. 1 and 2 are conceptual explanatory views of an example of a positioning device which is a means for carrying out the present invention.

The perforated substrates 1 are carried one by one onto a vertically movable printing table 8 by a carrier 2 from a substrate carrying device (not shown) in the previous process. The loaded perforated board 1 is positioned by a stopper 4 that is movable up and down in the direction of travel, and is further positioned by a fixed positioning member 5a and a movable positioning member 5b on the side surface perpendicular to the direction of travel of the board. ◇ These two alignment members 5a and 5b are designed so that their surfaces are flush with the surface of the perforated substrate 1 during printing. Of course. 6 is Noguirotto pin 6a
and a fixing pin 6b, which are a pair of positioning guide pins.

Both are installed on the printing table 8. Pilot pin 6a
is the fixing hole 7 of the perforated board 1 described later, which this fits into.
The tip is tapered so that it can be easily penetrated from a. It is movable in its axial direction. The mechanism for moving the slotted slot bin 6a that moves in the axial direction may be constructed as appropriate.For example, a drive source M that follows the vertical movement of the printing table 8 may be used, for example, a cylinder with a tapered pin attached to the printing table 3. It may be arranged. Further, the fixing pin 6b does not necessarily have to be movable, and from a processing standpoint, it is preferable that it protrude fixedly from the printing table 8. Therefore, its length is shorter than the thickness of the fixing hole 7b of the perforated substrate 1, which will be described later. The diameter of the fixing pin 6b may be determined as appropriate as long as it does not loosely fit in relation to the fixing hole 7b of the perforated substrate 1 (described later) to which it fits, but preferably it is slightly diameter.
It is preferable to form the hard fitting relationship so that it can be changed. However, in this case, a means for pressing the perforated substrate 1 onto the surface of the printing table 8 may be required.

A pair of guide pins 6 consisting of a pilot pin 6a and a fixing pin 6b installed on the printing table 8 are arranged in two sets on the side edge of the fixed positioning member 5a, but these arrangement positions are different from each other during printing. Direction of operation of squeegee S: Not unrelated to SQ, but if necessary.

During squeezing, the squeegeeing direction S is set so that the perforated substrate 1 can be brought into close contact with the printing table 8.
It is preferable to arrange them parallel to Q at two locations on the initial movement position side with appropriate spacing between them. FIG. 81 is a conceptual explanatory diagram of the specific hole 7 of the perforated substrate 1,
Pilot hole 7a and fixing hole? A one-to-one positioning specific hole 7 consisting of B is formed together with or separately from a through hole H for communicating with the back surface. This pair of specific holes 7 are uniformly drilled in all of the considerable number of perforated substrates 1 to be printed, and the pilot hole 7a and fixing hole 7b are located at the point Pl+ '' on the side edge of the perforated substrate 1. 2
It is also provided with a certain positional relationship with the opposite position. The distance relationship is also determined to be a certain relationship.

To explain this in more detail, the straight line from the impact point p,
Ilot hole 7a located on the intersection on the perpendicular line of point P2
A fixing hole 7b is provided at a constant distance from the pilot hole 7a. Therefore, the pair of guide pins 6 are installed on the printing table 8 so as to have the same distance relationship and 1 position relationship between the pair of specific holes 7 (
See Figure 8 (2). ) Therefore, when the perforated substrate 1 is temporarily positioned on the printing table 8 at a position for printing, the pilot pin 6a and the fixing pin 6b are fixed.

This means that it is located at a position that may match the pilot hole 7a and the fixing hole 7b. In other words.

In this state, as long as the pilot pin 6a passes through the pilot hole 7a, the fixing pin 6b and the fixing hole 7b, which are in a certain relationship with the pilot pin 6a, will definitely match. FIG. 4 is a conceptual diagram illustrating the process of holding the perforated substrate 1 positioned at a predetermined printing position on the printing table 8 by the method of the present invention. When the printing table 3 reaches a state where it can match each of the specific holes 7, the printing table 3 rises and the conveying tool 2 relatively descends (see FIG. 4 (1)), and in this process, the printing table 3 The pilot pin 6a provided in the pilot hole 7 of the perforated board 1
At this point when passing through a.

The perforated substrate 1 is moved from the temporary positioning state to the appropriate printing position.
This means that it has been confirmed that the situation has been reached.

(See Figure 4 (2).) After the perforated substrate 1 contacts the printing table 8 and secures a predetermined printing position, the pilot pin 6a descends to the position where it is submerged from the surface of the pilot hole 7a, and at the same time, the perforated substrate 1 is positioned in the advancing direction. Stopper 4 also. As the squeegee S descends below the surface of the perforated substrate 1, the printing operation is performed by the squeegee S (see FIG. 4 (4)).

After the printing work is completed, the movable positioning member 5b is separated from the perforated substrate 1. The printing table 8 also descends, and the perforated substrate 1 is transported to the next processing step by the relatively ascending conveyor 2.

As described above, the present invention provides a pair of specific holes provided in a perforated substrate, each having the same relationship as the specific hole.
It has a structure made by fitting a pair of guide pins that perform different functions, and if the pilot pin is located through the pilot hole.

There must be a fixing pin that has a specific relationship with this.

Since it matches the fixing hole, even if a deformed board due to side edge deformation is mixed into the perforated board to be printed, as long as it is within the allowable range, that is, the degree of deformation can be printed. If the error is such that the pilot pin of the table can penetrate the pilot hole of the perforated board, the fixing pin that has a certain relationship with this pilot pin will definitely fit into the fixing hole of the perforated board. Even a deformed substrate can be positioned at an appropriate printing position.

Also, according to the present invention, the pilot pin is first.

It consists of a structure that penetrates the pilot hole of the chemical substrate,
This is because it is guaranteed that the fixing pin will surely match the fixing hole as long as the pilot pin passes through the pilot hole.

Even if the diameter of the fixing pin is made equal to or slightly larger than the inner diameter of the fixing hole into which it fits, the two will not deviate from each other, and once they are fitted in this state, it will be 1 solid. As a result of changing the fitting force, it becomes possible to take more effective measures to realize a contact state between the perforated substrate and the printing table during printing.

[Brief explanation of the drawing]

Figure 1 is a conceptual top view explaining the positional relationship of the perforated substrate on the printing table, and Figures 2 (1) and (2) illustrate the relationship between the perforated substrate on the printing table and the guide pins. Fig. 2 (2) is a conceptual side sectional view, and Fig. 2 (2) is a conceptual side sectional view.
1) is a side sectional view taken from the A-A direction, Figure 8 (1) is a conceptual explanatory diagram of the positional relationship and distance relationship of specific holes on the perforated substrate, and Figure 8 (2) is a guide of the printing table. Conceptual explanatory diagram of pin positional relationship and distance relationship,
Figures 4 (1) to (4) are conceptual explanatory diagrams of the process of positioning the perforated substrate on the printing table, Figure 4 2a
FIG. 4 is an explanatory diagram of the process leading to state A in FIG. 4(2).

Claims (1)

[Claims] A pair of pilot holes and fixing holes that have a fixed positional relationship and a fixed distance relationship with the side edges of the perforated substrate whose position is regulated for printing in the printing table's traveling direction and side surfaces at opposite ends. - A plurality of sets of specific holes are drilled, and one-to-one sets of guide pins consisting of a pilot pin and a fixing pin, each having the same positional relationship and distance relationship as the pair of specific holes in each set, are installed. Several sets are installed on the printing table, each pilot pin of each set is movable in the axial direction, and the length of the fixing pin is shorter than the wall thickness of the fixing hole of the perforated board. is positioned on the printing table,
A screen printing method characterized in that the pilot pin penetrates the pilot hole of the perforated substrate and positions the fixing hole of the perforated substrate above the fixing bottle to perform final positioning for printing. A method for positioning a perforated substrate.