JPH10151888A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pen having excellent elasticity, wear resistance, corrosion resistance and economy, and satisfactory writability by forming the pen of an amorphous metal in a writing instrument for supplying water base ink of an ink container in a barrel to the pen at an end of the barrel. SOLUTION: In the writing instrument for supplying water base ink of an ink container in a barrel to a pen at an end of the barrel, the pen is formed of an amorphous metal. This metal has amorphous forming capacity having a thickness of 0.1mm or more at the time of cooling from its molten state on a copper plate. As an alloy having large such amorphous forming capacity, Zr-Al-(Co, Ni, Cu), Zr-Al-Cu-(Co, Ni, Fe), or Zr-Al-(Co, Ni, Cu)-B is, for example, used. Further, a high melting point metal of a platinum group is added to the alloy in the degree of affecting no influence on the amorphous forming capacity to increase its strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument in which aqueous ink in an ink container in a barrel is supplied to a pen at the tip of the barrel.

[0002]

2. Description of the Related Art A pen body of a writing instrument, for example, a pen tip of a fountain pen is formed of a gold alloy or stainless steel plate having excellent corrosion resistance because of using an aqueous ink. Then, in order to obtain wear resistance, a ball made of a cemented carbide is welded to the tip of the pen tip which comes into contact with the paper surface during writing. Further, in the case of a marker or the like, a pen body formed by molding a plastic called a plastic pen into a rod shape is often used.

[0003]

The pen tip of a fountain pen formed of a stainless steel plate is inexpensive and excellent in corrosion resistance, but has a low elasticity, so that the writing feel is heavy and hard. On the other hand, a pen tip of a fountain pen formed of a gold alloy plate material has excellent elasticity and bending strength and thus has a good writing taste, but has a disadvantage that the material price is high. Further, a marker using a plastic pen has an excellent writing quality, but has a disadvantage that the pen body has low wear resistance and a short life.

Accordingly, an object of the present invention is to provide a writing implement having a pen body which is excellent in elasticity, abrasion resistance, corrosion resistance and economy, and has a favorable writing taste.

[0005]

In order to achieve the above object, the present invention relates to a writing instrument in which aqueous ink in an ink container in a barrel is supplied to the pen body at the tip of the barrel. The amorphous metal preferably has an ability to form an amorphous layer having a thickness of 0.1 mm or more when cooled from a molten state on a copper plate.

[0006] Amorphous metals are attracting attention as metal materials having high strength and high corrosion resistance. However,
Conventionally, to produce this amorphous metal, a very large cooling capacity was required, so that only thin strips, thin lines, or powders could be obtained. I couldn't. However, in recent years, a bulk amorphous alloy having a thickness of about several tens of millimeters has been obtained due to advances in compounding techniques and the like.

Therefore, the present inventors have paid attention to the characteristics of the amorphous metal, such as high strength and high corrosion resistance, and have an ability to form an amorphous metal having a thickness of 0.1 mm or more when cooled from a molten state on a copper plate. The present invention has been completed by finding that amorphous metal has very favorable characteristics as a material for a pen body of a writing instrument, particularly, a pen point of a fountain pen.

[0008] As described above, the amorphous metal used in the present invention has an ability to form an amorphous layer having a thickness of 0.1 mm or more when cooled from a molten state on a copper plate. Those having an amorphous forming ability of 1 mm or more are desirable. When the amorphous forming ability has a thickness of 0.1 mm or less when cooled from a molten state on a copper plate, crystallization occurs when formed into a pen body by bending or the like, and the strength is extremely reduced. Not only that, the excellent properties of other amorphous metals are lost.

As an alloy system having such a large amorphous forming ability, for example, Zr-Al- (Co, Ni, C
u), Zr-Al-Cu- (Co, Ni, Fe), Zr
-Al- (Co, Ni, Cu) -B, Ti-Zr- (C
o, Ni, Co), Ti-Zr-Al-Be- (Ni,
Cu), Zr-Ti- (Ni, Cu) -Be, Fe-
(Al, Ga)-(P, C, B, Si, Ge), Mg-
(Ni, Cu) -Ln (Ln = rare earth metal), Ln-A
1- (Ni, Cu), Zr-Al-Cu-Ni-Pd,
Pd-Ni-Cu-P, Pd-Ni-P-Si, Pd-
Ni-P-B, Pd-Ni-Cu-P-B, Pt-Ni
-P, Pt-Ni-P-Si, Au-Ge-Si, and the like. Further, the strength can be increased by adding a platinum group-based high melting point metal or metalloid element to these alloys to such an extent that the amorphous forming ability is not affected.

The amorphous metal is formed into a pen shape by a method such as die casting, forging, and powder metallurgy, and post-processing such as polishing is performed to complete the pen. Conventionally, molding from amorphous powder has often been attempted, but since heating is necessary for molding, the amorphous state often collapses, and there are many difficulties in production, but it is used in the present invention. Since amorphous metal has good stability in an amorphous state, it can be easily formed.

A pen body formed of such an amorphous metal has high abrasion resistance and corrosion resistance, high elasticity, and good "glue" of the ink.
Long life, light and flexible writing feel can be obtained. Weld a ball made of cemented carbide to the tip of the pen tip,
If a hard material or fiber is mixed into the alloy to form a composite material, or if a hard plating is applied to improve the strength or wear resistance, a pen body having more excellent properties can be obtained. it can. Moreover, it is also good to perform decoration plating as needed.

[0012]

【Example】

Example 1 60 parts by weight of zirconium, aluminum 1
0 parts by weight, 10 parts by weight of nickel, and 20 parts by weight of copper are weighed, melted by an arc melting device, and Zr ₆₀ Al ₁₀ Ni ₁₀ C
It has created a u ₂₀ alloy. This alloy is melted by high frequency in a vacuum chamber, and the molten metal is injected at an injection temperature of 1000 ° C. and an injection pressure of 2
It was poured into a copper mold under the condition of atmospheric pressure to prepare a casting having a 0.3 mm thick fountain pen nib shape. This casting is provided with a 0.2 mm wide ink groove using a rotating grindstone,
After the tip was polished, the tip was moved by hot pressing to complete a fountain pen nib. The pen tip was incorporated into a fountain pen mechanism to complete the fountain pen.

Example 2 The same alloy as in Example 1 was formed on a copper plate with a thickness of 0.1 mm by using a twin-roll liquid quenching apparatus.
A 3 mm flat plate of an amorphous alloy was prepared. The flat plate was hot-pressed in a mold to produce a fountain pen nib-shaped forged product, and the same post-processing as in Example 1 was performed to complete a fountain pen nib. Incorporate this pen tip into the mechanism of the fountain pen,
The fountain pen was completed.

Example 3 Pd _{40 was} obtained by an arc melting method.
A Ni ₁₀ Cu ₃₀ P ₂₀ alloy was prepared. Using this alloy, an amorphous powder was prepared by a cavitation method. Further, this powder was filled in a mold, and a temperature of 300
Pressing was performed at a temperature of 100 ° C. and a temperature of 100 ° C. to produce a powder molded product having a fountain pen nib shape, and the same post-processing as in Example 1 was performed to complete a fountain pen nib. The pen tip was incorporated into a fountain pen mechanism to complete the fountain pen.

[Comparative Example 1] As Comparative Example 1, a fountain pen having the same shape as the pen tip of each embodiment and incorporating a pen tip formed of a gold alloy (14K) was prepared. [Comparative Example] As Comparative Example 2, a fountain pen having the same shape as the pen tip of each embodiment and incorporating the pen tip formed of a stainless steel plate was prepared.

The above five types of fountain pens were subjected to a filter paper ink ejection test and a pen tip deflection test. The results will be described below. FIG. 1 shows a test apparatus used for a filter paper ink discharge test. A circular filter paper 2 is arranged on a rotary plate 1 rotated by a motor 3. Then, the fountain pen W to be tested is attached to the chuck 4 and the pen point P comes into contact with the circular filter paper 2 with a predetermined load, but the fountain pen W moves outward from the center of the circular filter paper 2 with the rotation of the circular filter paper 2. It is supposed to. That is, the ink handwriting is drawn in a dense spiral circle.

Table 1 shows the results of the filter paper ink ejection test. In Table 1, the mark き わ め て indicates extremely good ink ejection, the mark 良好 indicates good, and the mark △ indicates slightly poor.

[0018]

[Table 1]

As can be seen from the examples, in all of the examples, the ink ejection was extremely good to good, and it was found that the ink ejection was excellent as compared with the comparative example. this is,
The pen tip of any of the examples has a good "glue" of the ink,
This is because even if the load is increased and the pen tip bends and a gap is formed between the pen tip and the pen core, the ink is supplied smoothly.

FIG. 2 shows a test device for the pen tip deflection test. The fountain pen W to be tested is attached to the rotary rod 5, and the tip of the pen tip P is brought into contact with a block 6 having a 60 ° inclined surface.
The relationship between the load applied to the fountain pen W and the amount of deflection of the pen tip was examined. The result is shown in FIG. As can be seen from these figures, each of the examples has an extremely large amount of deflection as compared with the comparative example, and has a soft writing feel and an extremely excellent writing feeling. Although the deflection amount of the second embodiment is not shown in FIG.
Since the alloy of Example 2 is the same as that of Example 1,
Approximately the same amount of deflection is obtained.

In the above embodiment, the pen tip of a fountain pen has been described. However, the present invention can be applied to any pen body such as a rod-shaped pen body such as a marker and a tip and a ball of a ballpoint pen. Good results can be obtained as with the pen tip.

[0022]

As described above, according to the present invention, in a writing instrument in which the aqueous ink in the ink storage portion in the barrel is supplied to the pen body at the tip of the barrel, the pen body is made of an amorphous metal. And a writing instrument having a pen body with excellent abrasion resistance, corrosion resistance, economic efficiency and favorable writing taste.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a test device used for a filter paper ink ejection test.

FIG. 2 is an explanatory diagram of a test device used for a pen tip deflection test.

FIG. 3 is an explanatory diagram showing a relationship between a load and a deflection amount of a pen tip.

[Explanation of symbols]

 Reference Signs List 1 rotating plate 2 circular filter paper 3 motor 4 rotating rod 5 block W fountain pen P pen point

Claims (2)

[Claims] 1. A writing implement in which aqueous ink in an ink storage portion in a barrel is supplied to a pen body at the tip of the barrel, wherein the pen body is made of amorphous metal. 2. The method according to claim 1, wherein the amorphous metal has an amorphous forming ability with a thickness of 0.1 mm or more when cooled from a molten state on a copper plate.
Writing instrument described.