JPS5882793A - Manufacture of pen point for note taking - 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 of manufacturing a writing instrument nib.

Conventional methods of manufacturing pen nibs made of synthetic resin (especially synthetic resin pens, photoelectric fiber nibs, etc.) are known, but the drawbacks of these writing nibs in terms of writing characteristics are: 1) low abrasion resistance; 12) Unavoidable problems such as low rigidity can be cited.

1 In order to improve these drawbacks, writing pen nibs made of metallic materials and non-metallic materials (ceramic 1 glass, etc.) are also known, but they have sufficient ink transport function along the entire length of the material. It is extremely difficult to form ink passages with current machining techniques.

In view of the above-mentioned drawbacks, the present invention has been devoted to a method of manufacturing a writing pen nib that has excellent wear resistance, first rigidity, and satisfies ink transport characteristics.The present invention has resulted in a hollow pipe KS having an island bottom. One writing end is formed by drilling 11 or more holes without penetrating the bottom from the inner end surface to the outer end surface, and then grinding the outer peripheral surface of the bottom until the holes are exposed on the surface. He was able to invent a method for manufacturing writing pen nibs.

An example of the method for manufacturing a writing instrument pen nib according to the present invention will be explained with reference to the drawings.As shown in FIG.
Drill one or more holes 6 from the inner end face 3 of the bottom part 2 toward the outer end face 4 without penetrating into a hollow pipe l (outer diameter 7 m/m, inner diameter 5 m/m) having a bottom part 2 of m/m. Then, by grinding the outer peripheral surface of the bottom 2 until the hole is exposed on the surface, a chopstick writing nib having the writing end 6 shown in FIG. 2 is obtained.

Materials for the hollow pipe used in the present invention include metal materials (aluminum, stainless steel, alloys made of two or more metals, etc.), non-metallic materials (ceramic, μ-glass, etc.), synthetic resin materials (especially) thermosetting resins, etc. ) etc., but 1 metal material -
Non-metallic materials are particularly preferred for the purposes of the present invention.

In addition, referring to the processing method of drilling a hole in the bottom of the present invention, for example, laser processing 1, electric discharge processing, ultrasonic processing, etc. can be considered, but especially) laser processing is used in the present invention.

Japanese Patent Publication No. 5.6-12519 is known as a writing pen nib using this laser processing, but when drilling a hole by laser processing, 1.
As a writing pen nib, which is the technical field of the present invention, the hole diameter of the ink passageway is approximately 10 to 200μ, and the depth is 1). It can be seen that it is about 2 to am/m at most.

Also, when laser processing is performed, the material instantly becomes
The melt 1 sublimates, but the molten residue remains on the surface and inside the core and solidifies when cooled, producing so-called "paris". The occurrence of such blemishes causes problems such as tearing of the paper surface, scratches, and uneven line width during one writing process.

The manufacturing method of the present invention includes the steps of (1) drilling a hole in a hollow pipe having a bottom without penetrating it from the inner end surface to the outer end surface of the bottom, and then (1) grinding the outer circumferential surface of the hollow pipe to form a writing end. During laser machining, air is blown into the hollow pipe or suctioned from the hollow pipe to remove the melted residue without causing any particles on the writing surface. It is possible to remove the residue remaining in one hole by blowing or suctioning air from the rear open end of the hole.

In addition, according to the manufacturing method that is a feature of the present invention, by appropriately selecting the thickness of the hollow pipe and further selecting the desired polished shape, numerous types of writing pens from thin to bold can be manufactured. In addition, holes of appropriate shapes can be provided according to the chemical and physical properties of the ink used.

For example, when using island laser processing, the size and depth of the hole to be drilled in a hollow pipe with a bottom, the focal length of the material to be processed, the number of pulses, the output intensity, etc. are selected appropriately, and the arrangement of the holes is determined to be NG ( By storing it in a numerical control system, it is possible to create extremely uniform writing pen nibs.

When assembling the writing nib produced by the manufacturing method of the present invention as a writing instrument, for example, insert the ink guiding member from the rear open end of the hollow nozzle until the tip of the member contacts the inner end surface of the bottom of the hollow pipe. The writing instrument body and the hollow pipe are connected until the writing instrument is inserted and the rear end of the ink guiding member is inserted into the ink storage body or ink cartridge.

By the way, when I wrote with this writing instrument, it was extremely rigid and had excellent abrasion resistance (the width of the writing line did not change even if I refilled the ink absorber or ink cartridge several times), and it was extremely hard to the touch. This also made carbon copying possible.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a hollow pipe used in the manufacturing method of the present invention. FIG. 2 is a longitudinal sectional view of a hollow pipe that has been made into a writing pen tip by the manufacturing method of the present invention. Patent applicant Teihoshi Co., Ltd. Representative Toshio Tajima

Claims (1)

[Claims] 1. In a hollow pipe having a bottom, 11 or more holes are bored from the inner end surface to the outer end surface of the bottom without any penetrating holes; 1. Then, the holes are exposed on the outer circumferential surface of the tortoise bottom. A method of manufacturing a writing pen nib that is made into a writing tip by grinding it to a fine point.