JPH01246060A - Surface polishing device for plane member - Google Patents

Abstract

PURPOSE:To perform two kinds of plane machinings on a plane member such as a printed circuit board with the same device by providing a polishing member eccentrically movably on a plane on the downstream side of a rectangular brush. CONSTITUTION:The brush main body (brush) 10 and the grindstone 15 of a nearly rectangular polishing brush section 4 are eccentrically moved on a plane via an eccentric shaft 12, the surface 2a of the printed circuit board 2 transferred by a transfer device 3 is polish-finished. In this case, brush stripes are formed on the surface 2a of the printed circuit board 2 by the brush main body 10, then the surface 2a of the printed circuit board 2 smoothly roughed by the brush stripes is smoothly finished by the grindstone 15.

Description

Detailed Description of the Invention [Field of Industrial Application] 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. It can also be used as a surface polishing device for parts.

[Conventional technology]

Patent application filed on November 10, 1988 by the applicant
Japanese Patent Publication No. 283368 describes a method for polishing the surface of a flat member and an apparatus therefor, in which the surface of the flat member is polished by 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 energies 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. wear is also uniform.

[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 are In some cases, continuous work is desirable.

(Means for Solving the Problems) An object of the present invention is to solve the above-mentioned problems. A surface polishing device for a flat member according to the present invention is suitable for polishing the surface of a flat member with a polishing member that moves eccentrically in the plane. , it is assumed that the polishing member is approximately rectangular and consists of a brush on the upstream side and a polishing stone on the downstream side.

Another feature of the present invention is that when a polishing member having a flat polishing surface is held so as to be capable of eccentric movement in a plane through an eccentric shaft, the polishing member is formed into a substantially rectangular shape and has a brush on the upstream side and a brush on the downstream side. It consists of a grinding wheel and is simultaneously driven by the eccentric shaft mentioned above.

[Operation] With the above-described configuration, the polishing brush 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.

〔Example〕

Embodiments and drawings illustrating the present invention will be described. Although polishing of a printed circuit board is exemplified as a planar member, the present invention is not limited thereto.

FIG. 1 is a perspective view showing the configuration of a surface polishing apparatus 1 for polishing the surface of a pudding l-1 plate according to the present invention, FIG. 2 is a front view of the main parts of FIG. 1, and FIG. FIG. 2 is a perspective view showing a state in which the surface of a printed circuit board is being polished.

As shown in the figure, the surface polishing apparatus I 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 Scotchi) 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 (stripes polished by a brush) 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, a method of polishing the surface 2a of the printed base Fi2 using the surface polishing apparatus 1 having the above configuration will be described.

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) 10 and grindstone 15 of the polishing brush section 4 are eccentrically moved via the eccentric shaft 12 to polish the surface 2a of the printed circuit board 2 that has been transported. This eccentric movement of the brush body 10 and the grinding wheel 15 creates a spiral "brush eye" on the surface of the printed circuit board 2, and this spiral "brush eye" is formed on the surface of the printed circuit board 2.
The printed circuit board surface 2a is smoothly roughened by the "brush marks" and further smoothed by the grindstone 15.

Then, as a final step, the printed circuit board 2 whose surface has been polished with a smoothed surface 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 brush 10 has a large number of brush bundles 16, and the fibers constituting each brush bundle 16 contain an 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.

Further, since the structure is simple and the processing line can be set extremely 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 1O and the grindstone 15.

Note that the polishing brush section 4 in the above configuration may be provided with a cleaning water spraying section (not shown) to spray high-pressure water from inside the brush body IO onto the surface 2a of the substrate. This configuration has the effect of cleaning copper powder and dust adhering to the printed circuit board surface 2a in the surface polishing step.

〔Effect of the invention〕

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

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 lO... Brush body 12... Eccentric shaft 15... Polishing whetstone 16... Bunch of brushes 18... Water supply hole No. Figure 4 Figure 5

Claims (2)

[Claims] (1) A device for polishing the surface of a flat member with a polishing member that moves eccentrically in the plane, wherein the polishing member is approximately rectangular and is composed of an upstream brush and a downstream polishing member. Polishing equipment. (2) The surface polishing device for a planar member according to claim 1, wherein the brushes are a plurality of bundles of brushes containing an abrasive, and the polishing wheel is a rubber grindstone containing an abrasive.