JPS5887097A - Method of molding chip of pipe type ball pen - 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 the tip forming force of a pipe-type ballpoint pen that processes a metal pipe and uses it as a tip.

Compared to synthetic resin tips, 1li4mA11) (
Excellent at 71.

In addition, it is easy to form.Using metal pipes as chips is becoming increasingly popular in recent years, but even if you say forming is easy.

The shape of the chip, especially the shape of the center and hole, is simple because it is easy to cut something of the same abrasiveness, and the dimensions of the pipe itself There are also variations in ink flow, problems with ink flow such as ink IJ9 (a phenomenon where ink flows backwards from the ink chamber side), and problems with ball retention. There are still many points that could be improved, such as the problem of noise (noise occurring in fll Mi, j' lR1) due to unnecessary movement of the ball within the first section.

Jz Questions i: J: , Inside the pipe-shaped chip.
1.・Insert into the hole [7 points of synthetic resin #ll rod tip ψ:
There are some places where "6" can be eliminated or C↓ reduced (1: Yes, but it is possible to eliminate or reduce C↓ in the structural weight glove, such as by using the fif as a ball catch.

At least inside the chip] Shape of hole b + n l no M 4
☆ If you can make it into 1 danshin like the various publicly known ideas regarding 1-made chips, and if you can make 1 taniyi + 7: complication power 11, you will be able to make more use of the quality of the metal chip. .

The present invention is based on two points of view, J: D fi a, and its gist is as follows: four parts are formed on the front peripheral wall. The center focus can be rotated from the center to the center of the center pin, and the convex part that is spaced from the plurality of l'J-lars arranged in the This is a method for forming a tip for a ballpoint pen, characterized in that the tip is formed in the center hole of the ballpoint pen.

Although the accompanying drawings are not detailed below, FIG. 1 shows an embodiment of the present invention.
・It shows a method of forming five dot-shaped protrusions at the ball-containing part of the hole, and the shape shown in Fig. 2 is shown in Figure 2. ) larger diameter part 1. Middle management department 2. The small diameter part is plastically deformed by the molding shell 13 to the pipe body in which the small diameter t'fli 3 has an inner/J-protrusion 4 for a 1d ball seat. Draw J
-t is there.

Molding J Tsukigai Hfd, center pi 15, l-, make the center pi 15 into the middle IL and arrange it in a j shape 1 [43 lock roller 6 and harden through the outer cylinder 7, [2 parts] (See Figure 5), when the 1-knoller 6 falls off, 1.
1-4 Remove the lid body 9 and find a number of recesses jiIS10, which are 1.1 digits in size, and are formed on the peripheral wall of the tip of the center bin 5 (c) at positions 12 [] from each other. Roller 6 Pc vs. 11-no father; ji + ? Due to this, the U II production was prevented.

The pipe capacity A is fixed to the Russoto chuck 12 of a lathe, for example, and the fixed part old 8 of the molding 1↓B is also fixed by a drill chuck (not shown) and rotated once. Four parts 10 of the center pin 5 to the pipe 14 A
A convex portion 13 is formed in a portion corresponding to the VC. (Of course,
The forming tool f31114 may be rotated, as long as the required relative rotation is made. ) This is the situation shown in Figure 1.

Thereafter, the single pipe A, which has been forcibly extracted due to the springback effect, undergoes processes such as forming a small opening and becomes a chip.

As can be seen here, the gap 14 between the center bin 5 and the roller 6 must be sufficient to plastically deform the pipe body A, and in FIG. A center pin 15 having a diameter approximately equal to that of the hole, and a pipe body A.
Although a combination with a roller 6 having a diameter sufficient to deform the bump body A from the outside is shown, the main body that deforms the bump body A is limited to the roller O. It may be 1 or 2. Therefore, the diameters of the center bin 5 and rollers 6 can be determined universally as necessary.

1, the shape of the pipe body A is, of course, as shown in FIG. 4. Even if the pipe body A1 has a simple shape as shown in FIG.
0, as shown in FIG.
As shown in FIG. 6, there is an annular recess 102 surrounding the tip of the center bin 52 (not shown).

These sets are combined into one set, and are formed so that one circumferential wall runs diagonally, and the shape and number (1, It's fine.

Furthermore, since the pipe body is made of metal, it takes a long time to form the 16 protrusions formed on the pipe body A into a completely clean or suitable size by forcing 17X due to the spring bank effect. A method as shown in Figure 7 may be used.

That is, after the center bin 56 is biased forward by the resilient part 41' 54 such as a coil spring 6-, the pipe body AMC size 1/turbine 55 is inserted.

The roller 61 is brought into contact with the pipe dweller so as to cause the deformation to occur. This (C): When removing it by force, use the roller 611, the hinge turbine 5, and the pipe (V) first.
4) It is possible to leave A.

Pipe body A id own bullet 1 shi 1. You will be able to play the game for a total of 1 minute. The embodiment shown in FIG. 7 is advantageous in that the Carper angle If of the roller 61 can be made small. This is because the Thebe angle t, r 13 There is a case where a glue 1 type is determined as the tip of the pipe body A, and it is considered that a smaller Thebe angle C1 can be a preferable tip for diagonal writing. In addition, in Figure 7,
Reference numeral 55 is a guide for the center pin 53.
6 is a tail plug.

Next, FIG. 8 illustrates that the present invention can be integrated with other molding into a tip on a pipe body.
The figure shows Qll integrated with the mouth formation (7
ing. Pipe body A is.

Being forced out. In addition, reference 1' January 7 irt center bin.

Finally, FIG. 9 shows an example in which the pipe body A is used as a tip. Fixed to chip holder 904 7'1. #Tinopso [ ] 2 (Pipe body A is molded. 1. In the hole, 1. In the hole, there are fiber bundles, branch l fat extrusion, id abrasive resin 1:l'6 aggregate, etc. 9 (Insert 13 and it's 1 building.

At the tip, turn the ball 904 1IiIII11-111
It is located in the center. At this time, the convex portion 915 (reference number 13 in FIG. 1) (works as a lateral vibration Jt prevention 11 for the r1 ball 9071, and also serves as a gap retainer for supplying the tip tip -\). I'm at 1-.

As explained below, according to the present invention, it is possible to form a desired 1111 part in the center hole of a bath-like chip in an easy way by applying a 5-roll. .

It is said that the extrusion method and the drawing method are very effective in reducing the distribution of noise and eliminating noise.
i! ! Regardless of the manufacturing method, once it is made, at the time of
It is also extremely useful for producing tips for ballpoint pens, which require precision, since it also eliminates variations such as uneven thickness of the 17' body.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a main part showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing an example of one pipe. Fig. 3 is a sectional view taken along the line I-I in Fig. 1, Fig. 4 is a vertical sectional view showing another example of the pipe eye, and Fig. 5 (a) d shows an example 2 of the tip of the center pin. Main part front view, Figure 5 (
■C) is a cross-sectional view taken along the line II-II in Figure 5 1A). Figure 6 is a front view of the main part showing another example of the tip of the center pin. Figures 7 and 8 are the main parts. FIG. 9 is a longitudinal sectional view of the main part showing embodiment X2 of the invention, and FIG. 9-8-・Pipe body, 13...1 Bosugi III together. 5.51.52.53.57・Pin turbine. 6, 61.62・Roller, in, jr
,, T[]λ 1FI3. i[]4...Four parts. To 1 913 --- Convex portion. Patent Applicant Pentel 1 Shu Shiki 71 10- Figure 8 Figure 9 Figure 7 Contents of Amendment Procedures Amendment Written December 8, 1982 1, Indication of Case Patent Application No. 186185 of 1982 2 Title of Invention Tip forming method for pipe type ballpoint pen 5 Relationship with the case of the person making the amendment Patent applicant address 7-2-4 Nihonbashikoami-cho, Chuo-ku, Tokyo, daily publication of amendment order Voluntary publication 5, Number of inventions increased by amendment 0 Specification No. 4
In the second line of the page, after [...inward protrusion 4], add 1 in appropriate numbers or in an annular shape. 53

Claims (1)

[Claims] Four parts are formed on the peripheral wall of the tip and a center bin. The tip of a metal chip pipe body is pushed into the gap between the rollers of a plurality of flins arranged in the J: which can be rotated with the center beam as the middle U, and Due to the relative rotation with the tip pipe body, the tip of the inserted tip pipe body is plastically deformed, and the convex portion corresponding to the four peripheral walls of the center bin is inserted into the center hole of the tip pipe body. Tip forming force Bf of a pipe type ballpoint pen characterized by forming.