JPH01252347A - Surface polishing device for plane member - Google Patents

Abstract

PURPOSE:To enable execution of two kinds of flattening works on a plane member, e.g. printed board, through a simple polishing device, by a method wherein an approximately rectangular polishing member is formed with a brush on the upper stream side and a polishing stone on the downstream side, and the brush and the polishing stone are driven by means of an eccentric shaft. CONSTITUTION:A brush body (brush) 10 of an approximately rectangular polishing brush part 4 and a grinding stone 15 are eccentrically moved through an eccentric shaft 12 with the aid of one and the same motor, and a surface 2a of a conveyed printed board 2 is polished. In this case, after helical brush streaks are formed in the surface 2a of the printed board 2 by means of the brush body 10, the surface 2a of the printed board smoothly coarsened by the brush tooth is smoothly polish-finished by means of a grinding stone 15.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention was developed as a surface polishing device for printed circuit boards for surface treatment of printed circuit boards in the process of manufacturing printed circuit boards, but it is widely applicable to flat members. Can be used as a surface polishing device.

[Conventional technology]

Patent application filed on November 10, 1988 by the applicant
No. 283368 discloses an apparatus for polishing the surface of a flat member using a polishing member that moves eccentrically in the plane.

According to the above-described invention, unlike the bristles of a rotating brush, which are given different energy depending on their radial distance, the bristles of an eccentrically moving brush are each given the same energy and perform the same abrasive action on the planar member, thereby improving the brush's performance. Wear is also even.

(Problems to be Solved by the Invention) Conventional polishing devices each have a configuration that performs a single function, and although it is natural from the structural and functional standpoint, when the polishing amount is relatively small, for example, the polishing brush and the polishing wheel In some cases, continuous work is desirable.

[Means to solve the problem]

An object of the present invention is to solve the above-mentioned problems, and in the case where a polishing member having a flat polishing surface is held so as to be capable of eccentric movement in a plane via an eccentric shaft, the polishing member is formed into a substantially rectangular shape upstream. Consists of a brush on the side and a grinding wheel on the downstream side.
It is characterized in that it is simultaneously driven by the eccentric shaft.

(Function) With the above-described configuration, the polishing plan and the polishing wheel can be driven in parallel by the same motor by utilizing the characteristics of eccentric drive, and the apparatus for finishing the surface of a flat member can be significantly simplified.

[Examples] Examples and drawings illustrating the present invention will be described. Although polishing of a printed m-board is exemplified as a flat member, the present invention is not limited thereto.

FIG. 1 is a perspective view showing the configuration of a surface polishing apparatus 1 for carrying out the printed circuit board surface polishing method according to the present invention, and FIG.
The figure is a front view of the main part of FIG. 1, and FIG. 3 is a perspective view showing a state in which the surface of the printed circuit board is being polished.

As shown in the figure, the surface polishing apparatus l includes a transport device 3 for transporting a printed circuit board 2 (see FIG. 2), and a transport device 3 for transporting a printed circuit board 2 (see FIG. 2).
The apparatus is comprised of a polishing section 4 for polishing the surface 2a of the printed circuit board 2 conveyed through the system, and an apparatus body 5 that houses the conveyance device 3 and the polishing section 4.

The conveying device 3 includes two conveying rolls 6.7 configured to be rotatably driven, and an endless belt 8 wound around the conveying rolls 6.7.
It is composed of a so-called belt conveyor. Reference numeral 9 indicates a conveyance guide roll for guiding the conveyance of the printed circuit board 2.

The polishing brush section 4 is composed of a brush main body (or scotch) 10, a brush holding section 11 that holds the brush main body 10, and an eccentric shaft 12 with a polishing grindstone 15 arranged in parallel on the downstream side. As shown in FIG. 3, the brush body 10 is formed in a brush holding portion 11 that is relatively long and rectangular in plan.

The brush holder 11 and the grindstone 15 are set to be eccentrically driven via the eccentric shaft 12. That is, the brush holder 11 and the polishing wheel 1 are eccentrically driven via the eccentric shaft 12.
5, the lines on the surface of the printed circuit board 2 (line after polishing according to the plan) are set evenly in the front-back and left-right directions of the board surface, and are further set smooth by a polishing wheel.

An opening 13 is provided on the side surface of the device main body 5 for carrying (supplying) the printed circuit board 2 to be subjected to surface polishing into the device;
An opening 14 is opened for carrying out (discharging) the printed circuit board 2 after the surface polishing process out of the apparatus. In addition, opening 1
3.14 may be set for import or export.

Next, print m is performed using the surface polishing device 1 having the above configuration.
A method for polishing the surface 2a of the plate 2 will be explained.

First, the printed circuit board 2 to be surface polished is placed in the opening 13 (
Or, it is supplied into the device through the opening 14).

Next, the supplied printed circuit board 2 is transported toward the polishing brush section 4 via the transport device 3.

Next, the brush main body (brush) lO of the polishing brush unit 4 and the grindstone 15 are moved eccentrically through the eccentric shaft 12 to polish the surface 2a of the printed circuit board 2 that has been transported. Due to the eccentric interlocking of the brush body 10 and the grinding wheel 15, a spiral "brush mark" is formed on the surface of the printed circuit board 2, and the printed circuit board surface 2a is smoothly roughened by this hood-like "brush mark". Furthermore, it is finished smooth by a grindstone 15.

Then, as a final step, the print radix 2, which has been surface-polished with its surface smoothed, is transported toward the opening 14 (or opening 13) via the transport device 3, and transported out of the device from the opening 14. .

Figure 4.5 shows an embodiment suitable for polishing relatively soft materials such as copper foil for printed circuit boards.

The plan 10 has a large number of brush bundles 16, and the fibers constituting each brush bundle 16 are filled with abrasive material. The main body 11 has a large number of water supply holes 18, and water is injected from a water supply device (not shown). In the illustrated example, the parallel grindstones 15 are rubber grindstones. This configuration allows different types of abrasive members to be used in parallel to obtain the desired finish without the need for extremely precise relative position adjustment devices.

As described above, in this embodiment, since the planar brush body 10 and the grinding wheel 15 are eccentrically moved via the eccentric shaft 12 for polishing, a smooth finish with uniform brush marks is obtained, and therefore, the print The substrate surface 2a will be polished smoothly.

As a result, the surface roughness is smoothed, the lamination adhesion in the post-process, the ink cutting property in the printing process, etc. are all improved, and fine pattern formation can be realized. Moreover, since the brush shape is not circular but flat, the brush can be easily processed and costs can be reduced.

Moreover, since the structure is simple and the processing line can be set short, there is an advantage that the apparatus can be simplified and the cost can be reduced.

Although not shown in the drawings, it is of course possible to set and adjust the respective pressing forces for the brush IO and the grindstone 15.

The polishing brush section 4 in the above configuration may be provided with a cleaning water spraying section (not shown) in order to spray high-pressure water from within the brush body 10 onto the printed circuit board surface 2a. According to, in the surface polishing process,
This has the effect of cleaning copper powder and dust adhering to the printed circuit board surface 2a.

〔Effect of the invention〕

As described above, according to the present invention, two types of planar processing on a planar member such as a printed circuit board can be performed with one simple device, facilitating processing and realizing fine pattern formation. .

This makes it possible to simplify the device and reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
Figure 1 is a front view of the main parts, Figure 3 is a perspective view showing the state in which the surface of a printed circuit board is polished, Figure 4 is a plan view showing an example of the brush and grindstone, and Figure 5 is the FIG. 3 is an end view of the figure. 2... Printed circuit board 2a... Surface 4... Polishing brush portion 10... Brush body 12... Eccentric shaft 15... Polishing whetstone 16... Bundle of brushes 18... Water supply hole No. Figure 4 Figure 5

Claims (2)

[Claims] (1) In a surface polishing device for a flat member configured by holding a polishing member with a flat polishing surface so as to be capable of eccentric movement in the plane via an eccentric shaft, the polishing member is approximately rectangular and has a brush on the upstream side and a brush on the downstream side. 1. A surface polishing device for a flat member, comprising a polishing wheel, and the upstream brush and the downstream polishing wheel are driven by the eccentric shaft. (2) The surface polishing device for a flat member according to claim 1, wherein the brushes are a plurality of bundles of brushes containing an abrasive material, and the polishing wheel is a rubber grindstone containing an abrasive material.