JPS62192587A - Horizontal conveyance type conveyor - Google Patents

Abstract

PURPOSE:To subject both faces of thin printed circuit boards to a uniform chemical treatment with high accuracy by superposing rollers at specified intervals to a staircase shape and crowning a conveyance surface at the time of imposing the thin printed circuit board on the many rotating rollers and subjecting the same to the chemical treatment by spraying a chemical treatment liquid to the top and bottom faces thereof while conveying the circuit boards. CONSTITUTION:While the thin printed circuit board are conveyed in an arrow direction by the many rollers 1-1-1-n, the chemical treatment liquid 5 is sprayed from upper and lower injectors 3-1, 3-2 thereto to make the chemical treatment such as etching. The rollers 1-1-1-n for conveying the circuit boards 4 are arranged to be superposed at specified intervals to the staircase shape and are so disposed that the conveyance face by the rollers is crowned. The engagement of the front end of the thin printed boards 4 into the spacings between the rollers or the fall thereof into said spacings by the injection pressure of the treatment liquid from above at the time when the front end thereof travels between the rollers and the stagnation of the treatment liquid atop the printed circuit board 4 and the consequent nonuniformity in the chemical treatment are obviated.

Description

[Detailed Description of the Invention] [Summary] A printed wiring board is placed on a frame < mI feeding ring) and moved horizontally, and a chemical treatment liquid is sprayed from above and below to remove the printed wiring board (hereinafter referred to as This is a horizontal conveyor for use in chemical processing equipment that sprays processing liquid onto both sides of printed boards (printed boards), in which the pieces are arranged in a stair-like manner so as to overlap at regular intervals, and the conveyor surface is configured to have a middle height. , which enables reliable conveyance of thin printed boards and uniform spraying of processing liquid onto both sides of the printed boards.

[Industrial application field]

The present invention places a printed wiring board and moves it horizontally,
Regarding the horizontal conveyor that sprays chemical treatment liquid on both sides of the board, this horizontal conveyor has been improved to ensure reliable conveyance of thin printed boards and to evenly spray treatment liquid on both sides of the printed board. It is related to.

In recent years, printed boards have become more multi-layered and denser.
In order to obtain a multilayer board with good hardness, it is necessary to transport the thin printed board forming the multilayer board reliably and to manufacture it with high precision.

This is why thin printed boards are reliable! There has been a demand for a horizontal conveyor that can carry out general conveyance and chemically treat both sides of each thin printed board with high precision.

[Conventional technology]

Conventionally, the frame conveyor system used in chemical processing equipment has a frame layout as shown in Fig. 4(a).
There is an open layout shown in the top view and side view of (bl), and an overlap layout shown in FIG. 6(a) and top view and side view of (bl).

As shown in FIG. 4 (5) and (b), in the open layout, frames 1-1 to 1-n are arranged in series in the transport direction of the arrow, and each of frames 1-1 to 1-n is and a plurality of pieces are fixed in parallel at equal intervals via axes 2-1 to 2-n to form an abacus-shaped roller.

The operation is as shown in the explanatory schematic diagram in Fig. 5.
-1 to 2-n rotation causes the thin printed board 4 placed on the top to move in the direction of the arrow, and the injection machines 3-1, 3-2 provided above and below the conveyor, respectively. A chemical treatment solution (etching solution, etc.) 5 is sprayed onto both sides of the printed board 4 to perform a chemical treatment such as etching.

In addition, as shown in Fig. 6+al and (bl), the overlap layout has a shape in which the pieces 1-1=1-n fixed to the axes 2-1 to 2-n are arranged in a staggered manner. The operation is the same as the open layout shown in FIG.

[Problem that the invention seeks to solve]

When the thin printed board (0,3 sized) is placed on the rollers and transported using the open layout conveyor described above, when the thin printed board crosses between the pieces, its tip end gets stuck between the pieces. In particular, there are many cases where the leading end gets stuck between the frames and falls due to the jetting pressure of the processing liquid from above, making transportation unreliable.

On the other hand, when conveying using rollers with an overlap layout, the intervals between the frames overlap, so the thin printed board does not fall as described above, but the frames block the spraying of the processing liquid from below. Therefore, there is a problem that the coating thickness on the lower surface varies and etching accuracy cannot be obtained.

Furthermore, if the conveyor has a horizontal cross-section, the processing liquid sprayed from above will accumulate on the top surface of the printed board 4, resulting in uneven coating thickness on the top surface, resulting in problems such as poor etching accuracy.

The present invention was created in view of these points, and is a horizontal conveyor that can reliably transport thin printed boards and spray processing liquid evenly onto both sides of the printed boards. is intended to provide.

[Means for solving problems]

Figure 1 (al, (bl) is a top view and side view of the conveyor of the present invention, Figure 3 is a cross-sectional schematic diagram of the conveyor of the present invention.
As shown in figures (al, (b)), frames 1-1 to 1-n
The conveyors are arranged so as to overlap each other at a constant period in a step-like manner, and the longitudinal section of the conveyor is curved so as to have a middle height as shown in FIG.

[Effect]

By arranging the frames 1-1 to 1-n so as to overlap with each other at a certain period, the area covered by the frames on the lower surface of the fourth printed board is reduced, and the spraying of the knee I cinda liquid from below becomes uniform. This improves the etching accuracy of the lower surface, and prevents the thin printed board from falling between the frames.

In addition, by making the conveyor cross section mid-height, the top surface of the printed board 4 is curved along the mid-height, and the processing liquid 5 spills smoothly, making the coating solution uniform on the top surface, which improves chemical processing such as etching accuracy. I'm doing well.

〔Example〕

Figures 1 (al) and (b) are top views of the conveyor of the present invention;
FIG. 2 shows an operation explanatory diagram and a side view of the conveyor of the present invention, and FIG. 3 shows a schematic cross-sectional view of the conveyor of one embodiment.

As shown in FIG. 1 fa), the conveyor of the present invention arranges the frames 1-1 to 1-n so that they overlap each other in a stepwise manner with a constant period, and as shown in FIG. The cross section is curved so that it is mid-height.

The operation is as shown in FIG.
is placed on the top and moves sequentially in the direction of the arrow as the tops 1-1 to 1-n rotate, and on both sides there are jets tJsi 3-1 provided above the printed board and below the top. 3
-2 Chemical treatment liquid 5 such as etching liquid sprayed by
is sprayed.

In this case, since the frames 1-1 to 1-n are arranged in a stair-like manner so as to overlap with each other at a certain period, the area covered by the frames to cover the lower surface of the printed board 4 is small. The spraying of the etching liquid 5 from the installed sprayer 3-2 is performed uniformly, eliminating the uneven spraying on the bottom surface of the printed board in the conventional overlap layout conveyor, and improving the etching accuracy of the bottom surface of the printed board 4. can do.

In addition, since the thin printed board moves sequentially between the pieces arranged in a step-like manner, the tip of the thin printed board does not fit between the pieces, and the printed board 4 does not fall, which was a problem with conventional oven layout conveyors. Become.

In the conveyor of the embodiment shown in FIG. 3, the shafts connecting the pieces are flexible joints 6-1 to 6-n, and the heights of the pieces are arranged so that the cross section is medium-height.

As a result, the printed board 4 adheres to the top surface and curves due to the spray pressure of the processing liquid from above, and the top surface becomes centrally high, making it possible for the etching liquid 5 to run smoothly on the top surface, and the processing liquid to be applied uniformly. This improves chemical processing such as the etching accuracy of the top surface.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reliably transport a thin printed board, and the processing liquid can be uniformly applied to both sides, allowing highly accurate chemical processing.

[Brief explanation of drawings]

Figures 1 (al) and (b) are top views of the conveyor of the present invention;
A side view, FIG. 2 is a schematic diagram explaining the operation of the conveyor of the present invention, FIG. 3 is a schematic cross-sectional diagram of the conveyor of one embodiment, and FIG.
bl is a top view and a side view of the oven layout conveyor; FIG. 5 is a schematic diagram explaining the operation of the oven layout conveyor; FIG. 6 (al) is a top view and a side view of the overlap layout conveyor. 1-1 to 1-n are frames, 2-1 to 2-n are shafts, 3-1 to 3-2 are injection machines, 4 is a printed board, 5 is a processing liquid, 6-1 to 6-n are It shows a flexible joint.

Claims (1)

[Claims] The printed board (
4) horizontally moved in a predetermined direction by rotation of the top;
In a horizontal conveyor for a chemical processing device that sprays a chemical processing liquid (5) onto both sides of the printed board from sprayers (3-1, 3-2) installed in the upper and lower directions, the pieces are arranged in a stepped manner. 1. A horizontal transport type conveyor, characterized in that the conveyors are arranged so as to overlap at a constant interval, and the cross section of the conveyor is formed to have a middle height.