JPS5829478A - Formation of resin coating to surface of outer blade of electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a resin coating on the surface of a mesh or clean outer blade of an electric shaver for oxidation prevention, coloring, etc.

The mesh screen-like outer blade has a large number of hair introduction holes and ribs between each hair introduction hole, and edges are formed at both ends of the back side of each rib that come into contact with the inner blade, which serve as the blade portion. . When a resin paint is applied to the surface of the outer blade by spraying or dipping to prevent oxidation or color, the paint film is formed on the entire surface side of each rib, and the paint film covers the entire surface of each rib. I'm sure it will be echoed. If the blade portion is covered with a coating film in this way, it will not lose its cutting function just by pulling on the whiskers, causing the problem that the blade will become unusable.

Therefore, the present invention aims to form a resin coating film on the surface of the outer cutter and then remove only the part of the coating film that covers the blade part, and in particular aims to simplify the removal process of that part. The purpose is to

That is, the present invention uses an ultraviolet ray or electron beam curable resin as the resin coating for the resin coating, and specifies the cross-sectional shape of the ribs of the outer blade and the irradiation direction of the ultraviolet rays or electron beam, respectively. When curing, we actively create an irradiation blind spot in the area that covers the blade part of the coating film, and after the coating film has cured, we simply remove the uncured part of the irradiation blind spot in the coating film with a solvent, thereby preventing only the blade part from being exposed. It is an object of the present invention to provide a method for forming a resin coating film on the outer blade surface of an electric shaver, which can be performed simply and reliably.

The details will be explained below based on the drawings.

FIG. 1 illustrates the outer blade of a vibrating electric shaver. This outer cutter main body 1 is formed by electrocasting using nickel or an alloy of nickel and cobalt, or by pressing an ultra-thin stainless steel plate to form a large number of bristles introducing holes 2 and ribs between the bristles introducing holes. As shown in FIG. 2, the ribs 3 are formed to have an inverted circular cross section, and both ends on the front side are formed into arcuate surfaces 4.4, and both ends on the back side An edge is formed on the edge and this is used as the blade portion 5. And the surface of this rib 3 has anti-oxidation,
A resin coating film 6 for coloring is formed, and the blade portion 5 is not exposed.

In Figure 113, when forming the resin coating film 6,
First, a coating film 6 is formed by applying an ultraviolet ray or electron beam curable resin to the entire surface of the rib 3 by spraying or dipping. Next, parallel ultraviolet rays or electron beams 11 are applied to the coating film 6.
The coating film 6 is cured by irradiating it perpendicularly to the surface. At this time, as shown in FIG. 4, the rub surface center portion 611 of the coating film 6 through which ultraviolet rays or electron beams perpendicularly pass through is cured almost uniformly in about 1 to 2 seconds, but the ribs of the coating film 6 Arc surfaces at both ends of the surface 4. In the upper part 6b, like the ultraviolet ray or electron beam islands shown in the same figure, the penetration depth is larger than in the central part 6b, and the penetration time is longer (%10 seconds), and as shown in ^, the total penetration time is longer. Because it reflects, it becomes a blind spot for irradiation,
It will be in an uncured state. The uncured portion is indicated by a broken line A. Thereafter, the blade portion 5 is exposed by washing and removing the uncured portion A of the coating film 6 with a solvent, such as by immersing it in a solvent ink.

In order to make the most efficient use of the irradiation blind spot described above, 94
As shown in the figure, it is preferable to set the arc radius R of the arc surfaces 4 and 4 at both ends of the rib 3 in a range of 60 to 80 μm, that is, approximately the same as the thickness of the outer blade. Alternatively, the electron beam itself does not reach the blade portion 5 sufficiently, and the blade portion 5 is not hardened.

As the ultraviolet ray or electron beam curable resin, for example, unsaturated polyester resin, thiol olefin resin, etc. are used.

Incidentally, a parabolic reflector may be used to convert ultraviolet rays into parallel rays.

Of course, it goes without saying that the present invention can be similarly applied to the outer blade of a rotary electric shaver in addition to a vibrating electric shaver.

As explained above, according to the present invention, since an ultraviolet ray or electron beam curable resin is used as the resin coating for the resin coating film 6 on the outer blade surface, not only can the curing treatment time be shortened, but also the curing time can be reduced. Because the hardening process does not apply heat, there is no thermal effect on the metal outer blade such as crystal enlargement.

In particular, both ends of the surface side of each rib 3 in the outer cutter main body l, that is, the area where the coating film covering the cutting edge part 5 forming the resin coating of the rib 3 is formed, are formed on the arcuate surface 4, and are protected against ultraviolet rays. Alternatively, the electron beam can be parallelized and irradiated perpendicularly to the surface of the coating film 6 for a few seconds, so that when the coating film is cured, the arcuate surface 4 of the coating film 6 becomes an irradiation blind spot and becomes an uncured screen. It is.

Therefore, after the coating film has been cured, it is possible to remove the uncured portion A using a solvent, which is a simple and quick process.
Only the blade portion 5 of the blade can be exposed very easily and reliably, and this method is excellent as a method for forming the wood g1 #1 film on the outer blade surface.

[Brief explanation of the drawing]

Figure 1 is a developed plan view of the outer blade of a vibrating electric shaver, Figure 2
The figure shows a partially enlarged sectional view of the outer cutter, and Figure jI3 ([1 or V) shows the process of forming a resin coating on the outer cutter.
Figure 14 is a transmission diagram of ultraviolet rays or electron beams. 1- Outer blade main body, 2... Hair introduction hole, 3... Tube, 4... Arc surface, 5... Blade portion, Patent applicant Kyushu Hitachi Maxell Co., Ltd.-]
Knee＼” Blind Third Diagram Rule 3 fV) Diagram 4 (t Muro b/3

Claims (1)

[Claims] (1) The outer blade main body 1 has a large number of hair introduction holes 2, and the ribs 3 of the winter hair introduction holes 2 and 2 have arcs at both ends of the back side.
4.4 and has a mesh screen-like outer blade formed in an inverted saucer cross section with both edges on the back side serving as blade parts 5, and the entire surface side of each rib 3 is coated with ultraviolet or electron beam curable resin. a step of applying parallel ultraviolet rays or an electron beam perpendicularly to the surface of the coating film 60 to form a coating film 6, and curing the rib center portion of the coating film 6;
The electric shaver consists of the steps of leaving the upper part of the arc @ 4 at both ends of the rib of the coating film 6 in an uncured state, applying the mat after +0, applying the chemical, and removing the solvent to expose the blade II 5. A method for forming a resin coating on the outer blade surface.