JPS621885A - Etching apparatus for printed board - Google Patents

Abstract

PURPOSE:To etch a printed board rapidly and uniformly, by putting the board in a cartridge tank contg. an etching liquid, putting the tank in a container box and revolving them. CONSTITUTION:The cartridge tank 10 is put in the container box 22 attached to revolving shaft 18 of motor, and the etching liquid 30 is fed in the tank 20 while leaving a part of apace. The printed board 44 is put in a guiding recessed part 42 in the tank 20, and it is closed tightly with a cover 34. The box 22 and the tank 20 of the inner part are revolved by revolution of the shaft 18 by driving motor, to stir the liquid 30 in the tank 20 and to reciprocate the board 44 in the part 42. Printed board is etched in a short time and uniformly by fluidized contact of the board with the liquid 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printed circuit board etching apparatus used for etching a printed circuit board or cleaning an etched printed circuit board.

[Conventional technology]

Conventionally, printed circuit boards have been etched using spray etching equipment. This spray etching device is designed to spray etching liquid from a nozzle and apply it to a printed circuit board.

However, it is not easy to uniformly spray the etching solution onto the printed circuit board, resulting in uneven etching and poor precision in the printed pattern shape.

In addition, in order to perform etching uniformly, it is necessary to install a large number of nozzles, detect the pressure of the etching liquid ejected from each nozzle, and use a regulator to adjust this pressure so that it is uniform. Yes, the structure is complicated.

Furthermore, since it is necessary to ensure a distance between the nozzle and the printed circuit board and to provide a recovery device using a pump for the blown etching liquid, there is a drawback that the device becomes large in size.

In addition, since droplets of etching liquid ejected from the nozzle contaminate the inside and surroundings of the device, it was necessary to pay sufficient attention to the installation environment and cleaning.

[Problem that the invention seeks to solve]

The present invention provides a printed circuit board that has a simple structure and can be miniaturized, is easy to install and handle, has less dirt inside and outside the device, can shorten etching processing time, and can be etched uniformly over the entire printed circuit board. The purpose of the present invention is to obtain an etching device for use in etching.

[Means for solving problems]

The etching apparatus for a printed circuit board according to the present invention includes a cartridge tank that is sealed and has a guide provided on its inner surface into which the edge of the printed circuit board is fitted, and a rotating means for rotating the cartridge tank.

[Effect]

Etching liquid is poured into the cartridge tank, and the printed circuit board is placed therein by fitting the edge of the printed circuit board into the guide provided in the cartridge tank. Next, the cartridge tank is sealed and rotated by the rotating means.

As a result, the etching liquid in the cartridge tank is stirred, and the edge of the printed circuit board is guided by the guide and moves periodically, increasing the etching speed.

[Embodiment] An embodiment of the printed circuit board etching apparatus according to the present invention will be described with reference to the drawings.

Fig. 1 shows a vertical cross-sectional view of the etching device for printed circuit boards, Fig. 2 shows a perspective view of the etching device for printed circuit boards, and Fig. 3 shows a cross-sectional view taken along line mm in Fig. 1. has been done.

In the printed circuit board etching apparatus, a support plate 10 bent into an L-shape is screwed onto a fixing base (not shown) with screws 12. A hole 14 is bored in the upright portion of the support plate 10, and the rotating shaft 18 of the motor 16 passes through the hole 14. The motor 16 is fixed to the support plate 10.

A storage box 22 that accommodates a cartridge tank 20 is attached to the tip of the rotating shaft 18 .

That is, a cylindrical mounting portion 24 is protruded from the center of the side surface of the storage box 22, and the tip of the rotating shaft 18 is fitted into the cylinder 26. There are screws 2 on the circumference of the mounting part 24.
8 is screwed in, and the lower end surface of the screw 28 presses the circumferential surface of the rotating shaft 18 to fix the storage box 22 to the rotating shaft 18.

The cartridge tank 20 is made of synthetic resin, and includes a tank body 32 into which the etching liquid 30 is placed, and a tank body 3.
It has a lid 34 that seals the upper end opening of 2. A convex portion 36 is provided on the inner surface of the lid 34, and a concave portion 38 is provided on the outer surface of the tank body 32 correspondingly. This convex portion 36 fits into the concave portion 38! 34 is attached to the tank body 32.

A guide recess 4 is provided in the side end surface 40 of the cartridge tank 20.
2 is provided, and the edge of the printed circuit board 44 is fitted into this guide recess 42 to guide the printed circuit board 44 in the vertical direction so that the wiring pattern surface of the printed circuit board 44 does not come into contact with the inner surface of the cartridge tank 20. It has become. The guide recess 42 has a smooth curved surface so that the contact area with the edge of the printed circuit board 44 is minimized. The cartridge tank 20 is adapted to be fitted into a storage box 22.

A band 46 is pivotally supported by a pin 48 at the upper opening edge of the storage box 22 . The band 46 is bent into an L-shape, and its tip 54 is bent into a U-shape. On the other hand, a knob 50 is provided on the side of the storage box 22 in correspondence with this tip 54.
is pivoted.

A locking ring 52 is pivotally supported on this knob 50.

Push up the tip of the knob 50 and attach the locking ring 52 to the tip 54.
When the distal end of the knob 50 is engaged and the distal end of the knob 50 is pushed down, the distal end 54 is locked by a snap action, so that the cartridge tank 20 will not fall out of the accommodation box 22 even if the accommodation box 22 is rotated.

Next, the operation of this embodiment configured as described above will be explained.

The etching solution 3 is poured into the cartridge tank 20 so as to leave a space for the solution to move and create a stirring effect.
0, then put the printed circuit board 44 to be etched into it and attach the lid 34 to the tank body 32. Next, fit the cartridge tank 20 into the storage box 22, and tighten the tip 54 of the band 46. The knob 50 is engaged with the locking ring 52, and the tip of the knob 50 is pushed down to lock the tip 54. Then, the motor 16 is rotated by a drive circuit (not shown).

Then, the etching liquid 30 in the cartridge tank 20
is stirred, and the edge of the printed circuit board 44 is guided into the guide recess 42 and reciprocates in the longitudinal direction of the guide recess 42. Therefore, the etching speed is increased.

Further, the printed circuit board 44 is uniformly etched by stirring the etching liquid 30 and reciprocating the printed circuit board 44, so that the etching processing time can be shortened.

Next, a second embodiment of the present invention will be described according to FIG.

In this second embodiment, two cartridge tanks 20 of the first embodiment are fitted into the storage box 22A. Further, etching liquid 30 is injected into one cartridge tank 20, and cleaning water 56 is injected into the other cartridge tank 20. This washing water 5
A printed circuit board 44 that has been subjected to etching is placed inside 6.

Therefore, by rotating the storage box 22A, the etching process and the cleaning process can be performed in parallel and at the same time.

Next, a third embodiment of the present invention will be described according to FIG.

In this third embodiment, the vertical and horizontal dimensions of the cartridge tank 2OA are longer than the vertical and horizontal dimensions of the printed circuit board 44. In addition, guide recesses 42A similar to the guide recesses 42 shown in FIG. 3 are provided not only on the side end surfaces but also on the upper and lower end surfaces of the cartridge tank 2OA in correspondence with the edges of the four sides of the printed circuit board 44. .

Therefore, the edge of the printed circuit board 44 is connected to the guide recess 42.
A, the printed circuit board 44 is inserted into the tank body 32, and the cartridge tank 20A is rotated clockwise in FIG. 5, the printed circuit board 44A rotates counterclockwise relative to the cartridge tank 20A. do. Since the printed circuit board 44 is subjected to centrifugal force, the edge of the printed circuit board 44 rotates while being guided by the guide recess 42A.

In this third embodiment, the range of periodic movement of the etching liquid 30 and the printed circuit board 44 is wider than in the first embodiment, so that etching is performed more uniformly and quickly than in the first embodiment. Become.

In each of the above embodiments, the rotating shaft 18 is connected to the storage box 22.
It may also be attached to an eccentric position on the side of the Further, the rotation direction of the motor 16 may be reversed at regular intervals to increase stirring efficiency. Furthermore, the storage box 22 may be rotated manually without using the motor 16.

Alternatively, the cartridge tank 20 may be directly attached to the rotating shaft 18 without using the storage box 22. Alternatively, a configuration may be adopted in which a large number of cartridge tanks 20 are arranged in series and both sides are supported pivotably.

〔Effect of the invention〕

In the printed circuit board etching apparatus according to the present invention, a guide into which the edge of the printed circuit board is fitted is provided on the inner surface of the cartridge tank, the cartridge tank is sealed, and the cartridge tank is rotated by a rotating means. Therefore, the etching liquid injected into the cartridge tank is stirred, and the printed circuit board is guided by the guide and moves periodically, increasing the etching speed.

Further, by stirring the etching solution and periodically moving the printed circuit board, the printed circuit board can be uniformly etched, and the etching processing time can be shortened. Furthermore, the apparatus has a simple structure consisting of a cartridge tank and a rotating means, and the apparatus can be made compact and easy to handle. Furthermore, since the cartridge tank is sealed, it has the excellent effect of preventing the etching liquid from contaminating the inside and outside of the apparatus.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the printed circuit board etching apparatus according to the present invention, FIG. 2 is a perspective view of FIG. 1,
Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 4 is a longitudinal sectional view showing a second embodiment of the present invention, and Fig. 5 is a longitudinal sectional view of a cartridge tank showing a third embodiment of the invention. It is a diagram. 16...Motor, 1st...Rotating shaft, 20.2OA...Cartridge tank, 30...Etching liquid, 42.42A...Guide recess, 44...Printed circuit board.

Claims (1)

[Claims] (1) An etching apparatus for a printed circuit board, comprising: a sealed cartridge tank having a guide provided on its inner surface into which the edge of the printed circuit board is fitted; and a rotating means for rotating the cartridge tank.