JPS5870439A - Grinder - Google Patents

Abstract

PURPOSE:To improve the grinding efficiency, operational efficiency of disk reproducing styluses for videos and durability of a glinder, by coating a metallic film on a circuit plate, on the surface of which numberless bits are formed and by embedding a grinding material in the bits. CONSTITUTION:The bumberless bits 3 are formed on the surface of a rotating plate 2 made of a high molecular material such as vinyl chloride, and thereon a thin film 5 such as nickel is coated by a metallic vapor-depositing method and sputtering method. Then, diamond fine powders 4 are embedded into the bits 3. Or the numberless bits 3 is formed to a metallic plate and therein the diamond fine powders are embedded. Said grinder is rotated and styluses bodies are moved repeatedly in a radius direction of the grinder to grind. By this way, a grinder having good durability and operational efficiency is manufactured. Specially, said grinder is suitable for grinding of disk reproducing styluses for videos.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing machine, particularly for video discs.
It is suitable for polishing rough edges, and the front surface of a rotary disk with countless bits formed on its surface is coated with a metal film, or the rotary disk itself is made of a metal plate. By embedding a grinding wheel in the grinder, the object is to improve its grinding efficiency, durability, chestnut production efficiency, etc.

Previously, the present applicant has proposed a silent melting type video disc in which information signals are recorded as bit pattern changes. This is carried out by rotating the disk, and using a reproducing needle having an electrode on the back side and a flat sliding surface at the tip, the reproducing needle is brought into sliding contact with the surface of the disk. Since this information signal is made up of tiny spiral bits spaced at regular intervals, the playback needle is inserted into one part of the sliding contact surface with the video disc.
(41 A wall with a peaceful sliding surface with a predetermined width; l, +
In general, in order to obtain such a recycled needle, a polishing machine is used to polish the needle tip during the manufacturing process.

As shown in Utility Application No. 55-116'718, filed by the present applicant, the polishing machine for the 11+ is a capacitive video disk itself with countless bits formed on the surface. However, it is conceivable that the bit may have a burr embedded in it.

Figure 1 (A) ld Oblique angle of this polishing machine;
) is an enlarged perspective view of a portion thereof. In the figure, a rotary disk 2 is made of a square polymer material such as vinyl chloride and molded into a disk shape by a manufacturing method similar to that used for known music records, and a bit 3 is formed on the surface thereof.

This is the capacitive video disc itself, but in order to use it for polishing, diamond fine particles 4 are embedded in the bit 3 to form a polishing disk 1.

The shape of the abutment before the polishing process, which is polished by the polishing machine 1, has a shape as shown in the enlarged view of FIG. An electrode 6 is attached thereto.

Next, to polish the recycled side before polishing, do
r: ! :l+) Place the grinding plate 1 on the turntable (I!-
The tip 7 of the diagonal body 2 is brought into pressure contact with the rotating grinding wheel 2, and ωI polishing is performed.

By this polishing, a sliding surface 1o having a shape as shown in FIGS. 9 and 10 is formed on the tip end 7, and the finished product is completed. FIG. 8 shows a perspective view of the recycled needle obtained by polishing. Incidentally, after this sharpening, the diagonal body 12 is fixed to the tip of the pickup arm 13 when the pick-up arm 13 is turned.

However, since this polishing machine 1 is made of a polymeric material such as vinyl chloride, if the above-mentioned sliding surface [0] is polished several times, the bit 3 on the surface of the polishing machine 10 will be destroyed and buried in the bit 3. Problems arise, such as the finely cut diamond particles 4 sinking into the rotary disk 2, reducing polishing efficiency.

The present invention provides a ++1 grinder which eliminates the above-mentioned gap M point, and an embodiment thereof will be explained below with reference to Figure RFII.

Fig. 2 is a diagram of an oblique screw U that does not show an embodiment of the polishing machine according to the present invention, and Figs.
Some enlarged oblique to show examples? M l・×1 and partially broken 11
Figure 1. In each figure, the rotary disk 2 is made of a polymeric material such as vinyl chloride, and countless bits 3 are formed on its surface, and gold such as nickel [II@-5 is 13
It is deposited with a thickness of 00A'. Furthermore, innumerable diamond particles 4 are embedded in the bit 3 on the surface coated with nickel, and the whole structure 1 constitutes a polishing machine. As a means of embedding it in the metal film 5, first, mix diamond fine particles 4 into a volatile solvent, apply this to the surface of the metal film 5, and apply the coated melt 4 to the fingertips or hand. This is done by forcing the solvent into the bit 3 with a roller or the like and then volatilizing the solvent.

As a result of a polisher experiment using the polishing machine 1 thus completed, the following good results were obtained.

In other words, as shown in FIG. 2, the rotating part (90
With the diagonal body 12 connected to the tip ΔIA of the pickup arm 13, the tip 7 of the diagonal body is brought into pressure contact with the surface of the polishing machine, and while applying a pressure of 200 mg 1 degree to the diagonal body 125-, it is moved in the direction of arrow B. Repeatedly move the polishing machine in the radial direction as shown, approximately 2
By polishing for 0 seconds, the tip 7 could be finished to a flat mirror surface without damaging the electrode 6. That is, FIG. 9 and v, l.

The electrode width in the direction connecting the ridge line 8 and the ridge line 9 shown in the figure is reduced by 2 at a polishing amount of 5 μm assuming a constant value W. When a video disc was played using this polished playback needle 11, it was possible to sense the information (Ff) from the video disc and completely play back everything.

Note that the recycled needle itself obtained by polishing with the polishing machine of the present invention is naturally the same as the conventional needle.

Next, with this polishing machine 1, the sliding surface 1o of the regenerated needle is polished several times.
I conducted an experiment several times, but only 3 bits were broken without breaking, and only 4 diamond particles were detected. The ilt l≠ material was stably embedded.

Note that in this example, the nickel film was deposited by metal vapor deposition; however, it is also possible to deposit the nickel film by other deposition methods such as sputtering or plating.
) However, the attachment and detachment is not limited to nickel only, and it is also possible to use materials suitable for attachment such as chromium, copper, etc. Furthermore, the adhesion layer can be either a single layer or a single layer, and there is no particular limitation. Bits 3 may be formed on the surface of a glass plate or the like, and a metal film 5 of nickel or the like may be adhered to the second bit.

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

5 and 6 are a partially enlarged perspective view and a partially cutaway sectional view showing an embodiment of the second invention of the present invention. In the embodiment of the second invention, a bit 3 is formed on the surface of the rotary ff12, a gold JIIll film 5 is deposited thereon, and an abrasive is embedded therein.
As shown in the figure below, the rotary disk 2 is made of a fully bendable material such as Ichikinkiryu and has bits 3 formed on its surface. A polishing disc 1 is constructed by using a polishing disc equipped with a bit 3 (similar to the polishing disc) itself, and diamond fine particles 4 are embedded in the pits 3 of the polishing disc 1.

By doing this, not only will the same effect as the first invention's polishing machine be achieved, but also the 'iMi II
)” is improved, and if you use the mother board mentioned above for history, it will be easier to do it.

In addition, as an abrasive material, materials other than diamond fine particles may be used.
Of course, it is also possible to use fine particles of c1.

As mentioned above, the first aspect of the present invention, the VC polishing machine, has a metal film coated on the surface of the rotary disc on which countless bits are formed, and a polishing mill is formed in the pits. By adopting the recessed structure, it is possible to particularly improve the polishing efficiency of the video disc playback needle, the durability of the polishing machine, the work efficiency, etc.

The polishing machine according to the second aspect of the present invention has a structure in which a rotary disc with countless bits formed on its surface is made of a metal plate, and an abrasive material is embedded in the bits. [Metal film coated on the surface] ~ Even without it, the effect of the first invention can be fully satisfied and the strength of the entire polishing machine can be learned.4? ,
It has the feature of

[Brief explanation of the drawing]

Figure 1 (A) is the research previously proposed by the applicant)! A perspective view of I:#, the same figure) is a solitary perspective view of a part thereof, FIG. 2 is a perspective view showing an embodiment of the polishing machine according to the present invention, and FIGS. 3 and 4 are its A partially enlarged perspective view and a partially cutaway sectional view showing an embodiment of the first invention, FIGS. 5 and 6 are a partially enlarged perspective view and a partially broken sectional view showing an embodiment of the second invention, 9th
The figure is a perspective view showing the condition before polishing of the regenerated needle to be polished by the polishing machine of the present invention, FIG. 8 is a perspective view showing the condition after several parts thereof, and FIG. A partially omitted front view showing the front shape, and No. 1 is a partially omitted plan view showing an enlarged sliding contact surface portion shown in FIG. 9. 1... Polishing machine, 2... Rotating disc, 3... Bit, 4
・・diamond particle, 5・・metal film, 6・electrode, 7・tip, 8, 9・ridgeline, ]0・sliding surface, 11・′P1 raw example, 12・・Italic, ]-3・
...Pickup arm. Patent applicant Michi Shishi, representative of Victor Japan Co., Ltd. - Part 9 - - 〇 - Figure 1/L

Claims (1)

[Scope of Claims] 1. A polishing machine comprising a rotary disc on which numerous bits are formed, a metal film coated on the surface, and a polishing abrasive embedded within the bits. 2. The polishing machine according to claim 1, wherein the rotary disc is a recording disc in which the information signal is recorded as a bit pattern in a grooveless if+i. 3. A polishing machine consisting of a rotary disc body made of a metal plate with countless bits formed on its surface, and polishing paulownia wood embedded in the pits. 4. Claim 3, wherein the rotary disk is a recording disk in which the accurate signal is recorded as a pattern of bits on a grooved surface.
The polishing machine described in section.