JPH03218789A - Blade body applied with coating treatment - Google Patents

Abstract

PURPOSE:Not only to improve the non-cohesiveness but also to improve the cutting quality and the durability in the blade body to which fluororesin coating is performed by performing the coating of three layers of a stress relaxation layer, a high hardness layer and a non-cohesive resin layer to a blade part of a stock. CONSTITUTION:To the blade body, the coating treatment of three layers consisting of a stress relaxation layer 3 formed by executing directly coating to the outside surface of a blade part 2 of a stock 1, a high hardness layer 4 formed by executing coating to the outside surface of this stress relaxation layer 3, and a non-cohesive resin layer 5 formed by executing coating to the outside surface of this high hardness layer 4 and the outside surface of the stock 1 is performed. The high hardness layer 4 further coated with the non-cohesive resin layer, and this high hardness layer 4 becomes a blade tip 4a and the cutting quality and the durability can be improved. Also, the stock 1 and the high hardness layer 4 are inferior in adhesion because various characteristics are different, but since the stress relaxation layer 3 is interposed between them, adhesion of the stock 1 and the stress relaxation layer 3, and adhesion of the stress relaxation layer 3 and the high hardness layer 4 are improved, respectively, and as a result, adhesion of the stock 1 and the high hardness layer 4 can be made firm.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the Invention [Industrial Field of Application] The present invention relates to improving the coating layer of a coated blade body of a cutlery such as scissors. [Prior Art] Conventionally, such blade bodies have been made of a material such as stainless steel with a fluororesin coating applied to the outer surface. Such a fluororesin coating reduces the adhesion to the blade, making it difficult for objects to be cut to adhere to it. [Problem to be solved by the invention] In such a blade, the cutting edge of the material is exposed, but due to the necessity of processing the material, it is difficult to make the material of the material highly hard, and the sharpness is poor. and durability deteriorates. The purpose of the present invention is to improve not only the non-stick properties but also the sharpness and durability of blades coated with fluororesin. Structure of the Invention [Means for Solving the Problems] In view of this object, the present invention provides a stress relaxation layer 3 coated on a blade portion 2 of a material 1, and a stress relaxation layer 3 coated on a blade portion 2 of a material 1, as shown in the drawings of each embodiment described later. A three-layer coating process consisting of a high hardness layer 4 coated on layer 3 and a non-adhesive resin layer 5 coated on this high hardness layer 4 is performed.

[Function] In the blade body configured in this way, the object to be cut is cut by the cutting edge 4a of the high hardness layer 4, and even if the object to be cut comes into contact with the non-adhesive resin layer 5 after cutting 17i, the object will not be cut. Difficult to adhere. Furthermore, since the material 1 and the high-hardness layer 4 have different properties, their adhesion is poor, but since the stress relaxation layer 3 is interposed between them, the adhesion between the material 1 and the stress relaxation layer 3 is improved. The adhesion between the stress relaxation layer 3 and the high hardness layer 4 is improved. “First Example” First, the first example in which the present invention is embodied in a scissors blade body is described in the first example.
This will be explained according to figures (a) to (h). Figure 1 (g) (h
) As shown, the blade according to this embodiment has a blade portion 2 of a material 1.
a stress relaxation layer 3 coated directly on the outer surface of the material 1; a high hardness layer 4 coated on the outer surface of the stress relaxation layer 3; and a non-adhesive resin layer 5 coated on the outer surface of the high hardness layer 4 and the outer surface of the material 1. A three-layer coating process is applied. The manufacturing procedure for this blade will be explained in detail. The material 1 shown in Fig. 1(a) is made of stainless steel, carbon tool steel, etc. For one end edge of such material 1 as shown in FIG.
The oblique bladed surface 2a as shown in b) is attached to one end surface 1 of the material 1.
Form so that it is continuous with a. Furthermore, one end surface 1a of the material 1 is removed to form a diagonal small blade surface 2b continuous with the blade surface 2a as shown in FIG. 1(C). A blade portion 2 is formed on the material 1 by the blade surface 2a and the small blade surface 2b. Next, the outer surface of the blade portion 2 is coated with a stress relaxation layer 3 as shown in FIG. 1(d). This stress relaxation layer 3 is T
It is made of titanium (titanium) and its thickness A is approximately 0.1μ. Note that the materials of this stress relaxation layer 3 include Zr (zirconium), Hf (hafnium), ■ (vanadium),
Nb (niobium), Ta (tantalum), Cr (chromium),
Use metals from the IVa group, Va group, and Vla group of the periodic table, such as MO (molybdenum) and W (tungsten).Next,
The outer surface of the stress relaxation layer 3 is coated with a high hardness layer 4 as shown in FIG. 1(e). This high hardness layer 4 is made of TiN (titanium nitride), Tic (titanium carbide), or TiCN (titanium carbonitride) with a Vickers hardness of Hv2000 or more, and its thickness B is 1 to 10μ. In addition to the above-mentioned materials, nitrides, carbides, or carbonitrides of metals of the above-mentioned groups are used.Next, the entire outer surface of the material 1 including the outer surface of the high-hardness layer 4 is coated as shown in FIG.
Coat with a non-stick resin layer (5) as shown in f). This non-adhesive resin layer 5 is made of fluororesin and has a thickness C of 3 to 15 microns. As a fluororesin, polytetrafluoroethylene (PTFE) + polyfluorinated vinyl (
PVF》, polyvinylidene fluoride (PVdF), polychlorinated trifluoroethylene (PCTFE), tetrafluoroethylene hexafluoropropylene copolymer (FEP), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-trifluoroethylene copolymer (ETFE), Fluorinated polyurethane copolymer (ECTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), etc. are used, and such fluororesins are used alone or in combination; One possibility is to mix fluororesin with binder resin and use a coating liquid in which fluororesin is dispersed within the binder resin. By using a binder resin, stronger adhesion can be obtained. Binder resins include phenol resin, acrylic resin, epoxy resin, polyamideimide resin, urethane resin, and silicone resin. Next, perform cutting as shown in Figure 1 (g).
By this cutting, the non-adhesive resin layer 5 is removed along the high hardness layer 4 on the small edged surface 2b of the blade part 2, and the high hardness layer 4 is exposed. When a pair of iron pieces having such blade bodies are supported so as to be openable and closable, and both blade bodies are rubbed against each other, the non-adhesive resin layer 5 is rubbed down to a wear line W as shown in FIG. 1(g). As shown in FIG. 1(h), the cutting edge 4a of the high hardness layer 4 is exposed. As described above, the scissor blade of this embodiment is coated with three layers: the stress relaxation layer 3, the high hardness layer 4, and the non-adhesive resin layer 5. The non-adhesive resin layer 5 prevents objects to be cut from sticking. This point is similar to that of the prior art described above, except that the blade portion 2 of the material 1 is coated with a high hardness layer 4, and this high hardness layer 4 is further coated with a non-adhesive resin layer 5. , this embodiment is different from the prior art. Therefore, this high hardness layer 4 becomes the cutting edge 4a, and can improve sharpness and durability. Furthermore, since the material 1 and the high-hardness layer 4 have different properties, their adhesion is poor, but since the stress relaxation layer 3 is interposed between them, the adhesion between the material 1 and the stress relaxation layer 3 is improved. The adhesion between the stress relaxation layer 3 and the high-hardness layer 4 is improved, and as a result, the adhesion between the material 1 and the high-hardness layer 4 can be strengthened.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. 2(a) to 2(g). In the first embodiment, the non-adhesive resin is applied so that the high hardness layer 4 remains coated on the cutter surface 2b of the blade portion 2 of the material 1 as shown in FIGS. 1(g) and 1(h). Only layer 5 is cut from the state shown in FIG. 1(f), but
In this second embodiment, the high hardness layer 4 is also cut so that the small edged surface 2b is exposed as shown in Fig. 2 (f>(g)). Small blade surface 2b
The manufacturing procedure differs in addition to the presence or absence of exposure. That is, the point that the cutting edge shown in FIG. 2(b) is performed from the material 1 shown in FIG. 2(a) is the same as that shown in FIGS. 1(a) and (b) of the first embodiment. In the first embodiment, a small blade shown in FIG. 1(C) is added to the blade shown in FIG. 1(b), whereas in this second embodiment, such a small blade is added. This is omitted, and the blade shown in FIG. 2(c) remains in the state shown in FIG. 2(b).
Coating of the stress relaxation layer 3 and high hardness layer 4 as shown in d) was carried out in the same manner as in the case shown in FIGS. 1(d) and 1(e) of the first embodiment. Next, in this second embodiment, the coating of the non-adhesive resin layer 5 as shown in FIG. 2(e) is applied as shown in FIG.
It is carried out in the same manner as in the case shown in f).

Comparing the case shown in FIG. 2(e) of the second embodiment and the case shown in FIG. 1(f) of the first embodiment, the second embodiment is the second embodiment in that it does not have a small blade. This is different from one embodiment. Next, in this second embodiment, as shown in FIG. 2(f), the non-adhesive resin layer 5 and the high hardness layer 4 are cut, and at the same time, a small blade is attached to the blade part 2 of the material 1. 2.Expose the small blade surface 2b. Then, when the blades of the scissors are rubbed together, a non-adhesive resin layer 5 is formed as shown in FIG. 2(g).
is worn away and the cutting edge 4a of the high hardness layer 4 is exposed.

Also in this second embodiment, the stress relaxation layer 3 and the high hardness layer 4
The advantage of having a three-layer structure consisting of the non-adhesive resin layer 5 and the non-adhesive resin layer 5 is the same as that of the first embodiment.

[Third Embodiment] Next, a third embodiment shown in FIGS. 3(a) to (C) will be described. As shown in FIGS. 3(b) and 3(c), this third embodiment is different from the second embodiment in that the small blade surface 2b of the blade portion 2 of the material 1 is coated with a non-adhesive resin layer 5. Figure 2 (f) (
The case shown in g) is interesting. The manufacturing procedure of the scissors blade according to the third embodiment is as shown in FIG. 2 (a>(b)(c) of the second embodiment).
) (d), but in the second embodiment, the non-adhesive resin layer 5 is coated from the state shown in FIG. 2(d) to the state shown in FIG. 2(e). On the other hand, in this third embodiment, as shown in FIG. 3(a), FIG. 2(d)
From the state shown in FIG. 1, a small blade is applied to the blade portion 2 of the material 1, and the stress relaxation layer 3 and high hardness layer 4 are cut, and the small blade surface 2b is exposed.

Then, from the state shown in FIG. 3(a), the non-adhesive resin layer 5
Coat as shown in Figure 3(b). When the blade bodies of the scissors according to the third embodiment are rubbed together, the cutting edge 4a of the high hardness layer 4 is exposed as shown in FIG. 3(c). Also in this third embodiment, the stress relaxation layer 3 and the high hardness layer 4
The advantage of having a three-layered tank structure with the non-adhesive resin layer 5 and the non-adhesive resin layer 5 is the same as in the first embodiment. Effects of the Invention According to the present invention, the non-adhesive resin layer 5 not only prevents the object to be cut from sticking, but also the high hardness layer 4 serves as the cutting edge 4a to improve sharpness and durability. The adhesion between the material 1 and the high hardness layer 4 can be made strong.

[Brief explanation of drawings]

FIGS. 1(a) to (h) are explanatory views showing the cross-section of the scissor blade according to the first embodiment, and FIGS. 2(a) to (g) is a similar explanatory diagram according to the second embodiment,
FIGS. 3(a) to 3(c) are similar explanatory diagrams according to the third embodiment. 1...Material, 2...Blade portion, 2a...Blade surface, 2b
... small blade surface, 3 ... stress relaxation layer, 4 ... high hardness layer, 4a ... cutting edge, 5 ... non-adhesive resin layer.

Claims (1)

[Claims] 1. A stress relaxation layer (3) coated on the blade part (2) of the material (1), a high hardness layer (4) coated on this stress relaxation layer (3), and a coating on this high hardness layer (4). A blade body characterized by being subjected to a three-layer coating treatment consisting of a non-adhesive resin layer (5).