JPH02144089A - Manufacture of external shaving cutter for electric shaver - Google Patents

Abstract

PURPOSE:To enable the external shaving cutter of counter-sunk-shaped amorphous alloy to be easily manufactured by having a process for shaping the recessed section of a thin sheet to a necessary depth with a pressure applying press, a process for forming a hair leading hole on the bottom surface of the recessed section of the shaped thin sheet with the processing of grinding, and a process for punching the thin sheet according to the profile of the external shaving cutter of an electric shaver. CONSTITUTION:A roll cooling body 2 has recessed sections 4, a projected section 5, and a recessed strip 6 on the periphery, and fused alloy 3 is set to be a thin sheet 12 having recessed sections 13, a projected section 14, and a profile recessed-strip 15 in this manner. In this case, the recessed sections 4 of the roll cooling body 2 are fine, and the roll cooling body 2 is rotated at high speed, and so the fused alloy 3 comes in no contact with the bottom surface of the recessed sections 4 of the roll cooling body 2, and is set in a floating state, and the recessed sections 13 are formed to be shallow. Besides, the thin sheet 12 is turned amorphous at the projected section 14 due to quenching freezing, but at the recessed sections 13, the sheet 12 comes in no contact with the roll cooling body 2, and so a cooling speed is slow, and the sheet 12 is turned amorphous. The profile recessed-strip 15 is also turned shallow and crystalline in the same manner as the recessed sections 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing an outer blade of an electric shaver using an amorphous alloy.

[Conventional technology]

Conventionally, a method disclosed in Japanese Unexamined Patent Publication No. 58-97300 has been proposed as a method for manufacturing outer blades of electric shavers using amorphous alloys. A roll cooling body 81 having an uneven outer cutter formation pattern on its peripheral surface, whose manufacturing method is shown in FIG. 8, is rotated, and an amorphous molten alloy (for example, F
e-Cr-M.

-C) is discharged from the crucible 82 and rapidly solidified.

As a result, an amorphous strip-shaped thin plate 83 having irregularities is formed. The convex portion of this thin plate 83 is ground with a grinding wheel 84 to form hair introduction holes 85, thereby producing a countersink-shaped outer cutter.

[The invention tries to solve i! l! [Problem] When the molten alloy coming out of the crucible 82 is rapidly cooled and solidified by the rotating roll cooling body 81, the roll cooling body 81 is rotating at high speed (1000 m/min or more), and the recesses 81a are fine. Therefore, as shown in FIG.
It solidifies in a floating state without contacting the bottom surface of 1a. Therefore, although the thin plate 83 has a slightly uneven shape, the unevenness cannot be sufficiently deep, and it is difficult to form the thin plate 83 into a countersink shape by grinding.

An object of the present invention is to provide a method for manufacturing an outer cutter of an electric shaver that can easily manufacture an outer cutter of an amorphous alloy having a countersink shape.

(Means for Solving Problem 41) This invention method involves rapidly solidifying molten metal on the surface of a roller cooling body having irregularities on the outer peripheral surface to form an amorphous thin plate with irregularities, and then grinding this thin plate. In the method for manufacturing an outer blade of an electric shaver, the recesses of the thin plate formed by the recesses of the roll cooling body are shaped to a required depth using a coining press.

[Effect]

According to the method of this invention, the molten alloy is brought into contact with the surface of the roll cooling body and rapidly solidified, but at this time, the roll cooling body is rotating at high speed and the uneven pattern is fine.
The molten alloy solidifies while floating in the recesses of the roll cooling body. Therefore, the unevenness of the thin plate becomes shallow. This shallow recess is shaped to the required depth using a coining press, and after shaping, the bottom surface of the recess in the thin plate is ground to form hair introduction holes.

As the four parts of the thin plate become deeper due to the above-mentioned shaping, a countersink-shaped outer cutter is obtained by grinding the bottom surfaces of the four parts. Since the bottom surface of the concave portion of the thin plate floats from the roll cooling body as described above during solidification, the cooling rate is too slow to become amorphous, and the bottom surface becomes crystalline. Therefore, shaping using a coining press can be easily performed. This crystalline part is later ground, so the finished outer cutter is almost entirely amorphous.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 6.

FIG. 1 shows an example of a manufacturing apparatus used in the method of the present invention, in which a roll cooling body 2 is arranged below a crucible. The roll cooling body 2 has a refrigerant circulation path inside and is rotated at high speed, and has a recess 4 and a projection 5 formed on its outer peripheral surface. The recessed portion 4 is a portion that forms the hair introduction hole of the outer blade, and the convex portion 5 is a portion that forms a rib portion between the hair introduction holes.

FIG. 6 is a developed plan view of the outer peripheral surface of the roll cooling body 2. FIG.

On the circumferential surface of the roll cooling body 2, a plurality of grooves 6 for cutting the outer cutter along the outer shape of the outer cutter are arranged at regular intervals in the circumferential direction. A pattern of convex portions 5 is formed.

In FIG. 1, numeral 7 is a coining roll press type, and its peripheral surface is formed in a pattern opposite to that of the roll cooling body 2. That is, the recessed portion 4 of the roll cooling body 2. A convex portion 8 that engages with the convex portion 5 and the grooved line 6. Recessed portion 9. and protrusions (not shown) are formed around the entire circumference. The coining roll press die 7 is rotated in the opposite direction in synchronization with the roll cooling body 2 . A rotary grinding wheel 10 and a thin plate support member 11 are arranged below the roll cooling body 2.

A manufacturing method using this device will be explained. The molten alloy 3 of the crucible is melted by an electric furnace or a high frequency furnace.

) is melted. This molten alloy 3 is jetted out from the nozzle 1a at the tip of the crucible 1 by gas pressure, and
It is brought into contact with the circumferential surface of the roll cooling body 2 that rotates at high speed under the , and is rapidly cooled and solidified.

The roll cooling body 2 has a recess 4 on its circumferential surface. Convex portion 5. and groove 6
(Fig. 6), and the molten alloy 3 has a recess 13. as shown in Fig. 2(A). Convex portion 14. This results in a thin plate 12 having grooves 15 with approximately the same outer shape. At this time, the recess 4 of the roll cooling body 2
is fine and the roll cooling body 2 is rotating at high speed, so the molten alloy 3 does not come into contact with the bottom surface of the recess 4 of the roll cooling body 2 as shown in FIG. 3(A), and is in a floating state. Then,
The recess 13 is formed shallowly. Further, the thin plate 12 has a convex portion 1
4, it becomes amorphous due to rapid solidification, but in the recess 13, since it does not contact the roll cooling body 2, the cooling rate is slow and it becomes crystalline. The external groove 15 is also shallow and crystalline like the recess 13.

This thin plate 12 with insufficient unevenness is shaped into a deep uneven shape along the uneven pattern of the roll cooling body 2 at the engagement part between the roll cooling body 2 and the coining roll press mold 7 (second
Figure (B), Figure 3 (B)).

Since the recessed portion 13 and the external concave line 15 to be coined are crystalline as described above, their hardness is low and shaping can be easily performed.

Thereafter, the thin plate 12 peeled off from the roll cooling body 2 is removed by a lower grinding wheel lO as shown in FIG. 2(C).

As shown in FIG. 3(C), the bottom surface of the recess 13 is ground. As a result, the hair introduction hole 16 is formed, and the hair introduction hole 16
The rib 17 in between has a countersink shape (see FIG. 5). A portion 13' indicated by a chain line in FIG. 3(C) indicates a portion removed by grinding.

This grinding removes the crystalline portion. Since it is crystalline, it is also easy to grind.

Thereafter, the outer cutter 15 is cut out using a press at the grooved outer cutter 15 to form a single outer cutter 18 as shown in FIG.

When punching out the outer shape, since the outer groove grooves 15 are crystalline, punching can be easily performed.

In this way, by shaping with a coining press before grinding,
The countersink-shaped outer cutter 18 can be easily manufactured. In addition, since the manufactured outer blade 1 day is entirely made of an amorphous alloy, it has higher hardness, higher strength, and higher toughness than conventional stainless steel or nickel electroformed materials, and has durability that does not easily deform. It will be excellent.

FIG. 7 shows another embodiment. In this method, in place of the coining roll press mold 7 shown in FIG. 1, a pair of opposing coining press molds 19 and 20 are used to punch and shape the concave portion 13 and the contour groove 15 of the thin plate 2.

The coining press die 20 has an uneven pattern similar to the circumferential surface of the roll cooling body 2, and is driven forward and backward as shown by arrow a. The coining press die 19 has an uneven pattern opposite to the circumferential surface of the roll cooling body 2 . The coining press mold 19.20 is
It is necessary to position the concavo-convex pattern so that it matches the concave portion 13 of the thin plate 12 formed by the roll cooling body 2.

When coining in this manner, the countersink-shaped outer cutter 18 can be easily manufactured in the same manner as described above.

In addition, although the external grooved line 15 was formed in the said Example, the external grooved line 15 does not necessarily need to be provided.

[Effects of the Invention] In the method for manufacturing the outer blade of an electric shaver of the present invention, a shallow recess in a thin plate rapidly solidified with a roll cooling body is shaped by a coining press, so that the recess can be made sufficiently deep, so that a countersink shape can be obtained. The outer cutter can be easily manufactured.

In this case, the recesses to be shaped become crystalline without coming into contact with the roll cooling body during solidification, so that shaping can be easily performed. Moreover, since this crystalline part is later ground to form the hair introduction hole, the outer blade becomes almost entirely amorphous, resulting in high hardness and
It has high strength and toughness, and has the effect of being durable and long-lasting without being easily deformed.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of manufacturing equipment used in an embodiment of the present invention, FIGS. 2 and 3 are illustrations of the manufacturing process,
Fig. 4 is a plan view of the manufactured outer cutter, Fig. 5 is a partially enlarged sectional view of the outer cutter, Fig. 6 is a developed plan view of the roll cooling body in the manufacturing equipment, and Fig. 7 is a plan view of the other outer cutter. FIG. 8 is a broken front view of the manufacturing equipment used in the example, FIG. 8 is a broken pressure surface view of the conventional example, and FIG. 9 is a partial sectional view thereof. l... Crucible, 2... Roll cooling body, 4... Concave portion, 5... Convex portion, 7... Coining roll press mold, 10...
... Grinding wheel, 12 ... Thin plate, 13 ... Concavity, 14
...Convex part, 19°20... Coin press type diagram diagram diagram diagram diagram diagram diagram diagram diagram

Claims (1)

[Claims] A step of rotating a roll cooling body having an uneven outer peripheral surface and rapidly solidifying the molten metal on the surface of the roll cooling body to form an uneven amorphous thin plate; A step of shaping the concave portion of the thin plate to the required depth using a coining press, a step of forming hair introduction holes by grinding on the bottom of the concave portion of the shaped thin plate, and shaping the thin plate to the outer shape of the outer blade of an electric shaver. A method for manufacturing an outer blade of an electric razor, including a step of punching.