JPS5914998A - Pen lead - 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 particularly relates to a synthetic resin pen core.

Conventional pen nibs are made of felt, synthetic resin fiber, porous rubber, synthetic resin, metal, etc. However, among the above pen nibs, synthetic resin pen nibs in particular have the following disadvantages: had.

That is, most conventional synthetic resin pen cores were formed by extrusion molding using materials such as boria heptatar resin and nylon resin. Therefore, this type of pen core is generally used for pens. This is because the center of the core has multiple ink circulation holes that penetrate from the front to the rear.
Due to the characteristics of synthetic resin, the pen core is flexible, so when writing, the pen core tends to swell, making it difficult to write.If used for a long time, the tip of the pen core wears down due to writing friction, making it difficult to write. There was a drawback that the width of the writing line changed.

Therefore, the present invention aims to provide a means for completely preventing these drawbacks, and has the following features.

That is, the basic structure for completely forming the pen core of the present invention is as follows.

(1) Actual Example 1 (The same applies below parts by weight) The main raw material is polyacetal resin, and this is used as a reinforcing raw material in the form of glass fine particles or fibers with a particle size or diameter in the range of 10) to 50 mm. An appropriate amount was used in the range of 5 to 5, the two were heated together, kneaded so that the glass particles were uniformly dispersed in the Duracon raw material, and then pelletized and cooled.

Next, this pellet was extruded into a rod-shaped body having a diameter of about 2 mm using an extrusion molding machine, and continuous pores were formed in the center thereof, communicating from the front end to the rear end.

Next, this rod-shaped body was cut to a suitable length as a pen core, and the front and rear ends were completely cut to form a pen core.

(2) Example 2 The main raw material is polyacetal resin, and the particle size is 100 mm, while the reinforcing raw material has a particle size of 20 mm. An appropriate amount of brass particulate sound in the range of 2 to 10 was used. Both were used to make a pen core in the same manner as in Example (1).

(3) Example 3 A polyacetal resin is used as the main raw material, and an appropriate amount of copper fine particles with a particle size in the range of 5 to 607 is used as a reinforcing material to 100, and both are used. A pen core was prepared using the same method as in Example (1).

(4) Example 4 Polyacetal resin was used as the main raw material, and fine stainless steel particles with a particle size in the range of 15 to 35) were applied as a reinforcing material to 100 ft of polyacetal resin. A pen core was prepared in the same manner as in Example (1).

(5) Example 5 Main raw material? Using nylon resin as a reinforcing raw material, a suitable amount of aluminum fine particles with a particle size in the range of 20 to 8s) A was used, and a pen core was prepared in the same manner as in Example (1). And so.

(6) Example 6 A polyurethane resin was used as the main raw material, and an appropriate amount of aluminum fine particles with a particle size in the range of 3 to 28 liters was used as a reinforcing material to the total 100. A pen core was prepared in the same manner as in Example (1).

(7) Example 7 Using nylon resin as the main raw material, this was used as a reinforcing raw material with a diameter of 18mm to 58mm! No. 7 aromatic polyamide fiber (product name: KEVLAR manufactured by DuPont)
After kneading the aromatic polyamide fiber #3 into the nylon resin using an appropriate amount in the range of 10 to 40 to uniformly disperse it, the mixture is molded into a shape of 2 mm in diameter using an attraction molding machine, and the mixture is molded from the front end to the center. Continuous pores leading to the rear end were completely formed.

Next, this rod-shaped body was cut to an appropriate length as a pen core, and the front and rear ends were cut round to form a pen core.

Furthermore, since the reinforcing material added to the pen core was uniformly dispersed in the pen core, it worked to prevent the writing surface portion of the pen core (8) from being worn away by writing.

Therefore, even when writing is performed over a long period of time, the tip of the pen core does not deform, and it is now possible to write with even-width writing lines over a long period of time.

Incidentally, the ink flows from the ink storage body 3 to the tip of the pen core through an ink flow hole 4 formed at the center of the pen head.

(8) Example 8 Using polyacetal resin as the main raw material, this '110
0, glass particles 207 to 401 coated with the same polyacetal resin as the main raw material and other synthetic resins having similar core properties to the raw raw materials were used as auxiliary raw materials.4 One Example (1) ) A pen nib was formed using the same method.

It was well integrated, and its strength was about twice as strong as that of the first example, which was not coated, and exhibited excellent effects in terms of durability and abrasion resistance.

(9) Example 9 Using polyacetal resin as the main raw material, this 'e10
0, add 67 to 18% of glass fine particles as an auxiliary raw material in an appropriate amount in the range of 4 to 18, heat, melt and knead to uniformly mix both, form into pellets, and cool. Let solidify.

Next, this pellet is put into the injection molding machine and the third
Form a ball chip holder B (j) as shown in the figure.

This ball chip holder B, as shown in the figure,
Head 20 and ball holding portion 21 formed on this head 20
The head part 20 and the ink guide capillary part 22 each have an ink guide hole 23 communicating with the ball holding part 21 of the head part 20. It is formed.

A ball 24 is held in the ball holding part 21 of this pole chip holder B.

When the pole tip holder B shown in this embodiment is attached to the writing instrument 1 as shown in Fig. 1 and used for writing,
Since fine glass particles are uniformly dispersed throughout the pole tip holder B, the hardness of the entire pole tip boulder B is improved, the dimensional stability of the pole holding part 21 is increased, and the ball 24 is evenly dispersed during use. may protrude from the ball holding part 21, or the head 20 may be deformed due to the pressure of the pen, causing the ball 24 to
In addition to preventing the ball from spinning out of zero rotation, the fine glass powder also prevents wear of the ball holding portion 21 caused by the rotation of the ball, making it possible to use the ball for a long period of time.

As described above, the present invention uses synthetic resin gold as the main raw material, uses a material with higher hardness as the reinforcing material than the synthetic resin that is the main material, and uses a pen with the reinforcing material uniformly dispersed in the main material. Since the core is formed, the hardness of the pen core increases,
During use, the pen core no longer twirls due to pen pressure, making it easier to write, and the reinforcing material reduces wear on the pen core, preventing the pen core from deforming even after long-term use. It has become possible to provide high-quality pen nibs.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional view showing an example of use of the present invention. FIG. 2 is a partially enlarged sectional view of a pen core. Figure 3 is a partial cross-sectional view showing an example of the use of the present invention 07- Figure 2 Figure 50 8- Procedural amendment Dear Commissioner of the Patent Office 1, Indication of the case Patent application 3 filed on July 16, 1980 , Relationship to the case of the person making the amendment Applicant (name) Shachihata Kogyo Co., Ltd. 4, Column 5 of [Detailed Description of the Invention] of the specification to be amended, contents of the amendment as stated in the attached document Insert the following text between the 17th and 18th lines from the top of page 7 of the specification for the contents of the paper 5° correction: r(10) Example 10 For polyacetal resin 100 used as the main raw material,
This includes 20% to 60% carbon fiber in polyacetal resin.
The mixed carbon fiber-filled resin was extruded using a 2 to 60 mm total extrusion molding machine under the following conditions to form a rod-shaped body having an ink flow hole of 11 mm in diameter continuous from the front end to the rear end in the center. Mold temperature: 170°C Screw rotation speed: 24 turns/min Winding and pulling speed: 39.2 m/min Cooling temperature (water temperature): 23°C Cut this into a length of 4 m, sharpen both ends, and use it as a pen core. As a result, a pen core with excellent wear resistance was formed. The writing distance of this pen core varies depending on the amount of carbon fiber-filled resin, but it is possible to write from 2,000 meters to 4,000 meters, and it can write 2 to 4 times as much as the +>' lead of ordinary polyacetic resin alone. Ta. (11) Example 11 The polyacetal resin used as the main raw material has a particle size of 8 to 40 per 100 polyacetal resins! 2 glass peas
Polyacetal resin containing 0% to 60% 5 to 50
Using an extrusion molding machine, extrusion molding was performed under the following conditions, and a rod-shaped body having a diameter of 19 mm and having an ink flow passage continuous from the front end to the rear end in the center was extruded. Mold temperature: 175°C Screw rotation speed: 24 turns/min Tensioning speed: 45.8 m/min Cooling temperature (water temperature): 25°C When used as a pen core, a pen core with moderate hardness and excellent abrasion resistance was formed. When this pen core was fixed to the tip of a writing instrument and a writing test was conducted, it could be used from 3,000 meters. It is now possible to write at a distance of 4,000 meters, approximately 3 to 6 times as long as a normal polyacetal resin pen core.2-

Claims (1)

[Claims] Synthetic resin is used as the main raw material, and fine particles or fibers of non-rust metal with higher hardness than this main raw material are used as the reinforcing raw material.The reinforcing raw material is uniformly dispersed in all the main raw materials, and the central part is A pen core characterized by having an ink flow hole that penetrates in the axial direction.