JPH07257088A - Manufacture of tip having hole for writing brush - Google Patents

Abstract

PURPOSE:To manufacture a tip having a hole for a writing brush with reduced likelihood of a material loss that has a content liquid-introduction hole piercing through the fusion-combined layer at the tip rear end of a writing brush formed in the center of a fusion-combined surface, and also a tip with the hole of a writing brush having the longest hair of a writing brush emphasized by making tips converge into a point densely. CONSTITUTION:Energy beam 11 is emitted on the rear end surface of a hair bundle to be combination-fused via a masking plate 7, thereby enabling respective mono-filaments of the hair bundle to be fused each other necessarily and sufficiently to form a tip and, in this instance, stakes 14 steeply tapered at the center of a non-masked part 5 of the masking plate 7 are made in the form of perpendicularly hanging down with respect to the masking plate 7 surface, and then the stakes 14 are inserted into the rear cross sectional surface of the hair bundle by emitting energy beam 11, resulting in forming a content liquid-introduction hole in the center of the fused bundle surface at the rear end of the ear tip.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a brush pen neck which is a writing brush such as a fountain pen having ink in its inside.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
Some brush heads of this kind use a sponge-like absorbent material in combination with the overall structure of the brush pen, but they cannot provide the original writing function of a writing brush.

There are a so-called tapered bristle in which the tip of a synthetic fiber is sharply sharpened in a taper shape, and a material made of animal hair, and the like. Is a flat bundle of hair or a bundle of fibers bundled to a predetermined bulk density, and the surfaces of the tips are made flat, and the cross section on the opposite side is fixed with an adhesive or melted by heating, and a punched punch with a predetermined contour is heated. To form divided cut contours, which is then called hair splitting and bent along the cut contours to form the split necks in the fused cross section of the cut contours.

If the content liquid is supplied from the outer circumference of the ear neck due to the structure of the entire writing pen, this is sufficient, but the content liquid should be supplied through the rear end surface after fusion of the ear neck. In this case, it is necessary to provide a supply hole for supplying the content liquid on the rear end surface of the fused neck.

Although a drill hole can be formed in the end face after fusion of the ear neck by post-processing, the portion located at the center of the end face after fusion of the ear neck is a portion called life hair. If the portion is missing, the writing performance of the writing pen will be significantly impaired.

Therefore, if the position of the drilled hole to be narrowed is displaced from the center, a deviation occurs, and even if a plurality of smaller holes are narrowed away while avoiding the central portion, the result is not so good.

If the projection corresponding to the narrowing hole is provided at the center of the cut contour instead of removing the portion, the punch itself is a heat punch, and thus the narrowing is performed. The installation projection is also heated, and the narrowed hole is blocked by fusion of the inner surface and the content liquid is no longer supplied.

Here, as a prior art partially overlapping with the contents of the present application, there is Japanese Patent Publication No. 2-34606 of the present application, which manufactures the ear neck by using a laser beam, which supplies the content liquid. There is no supply hole for it.

Similarly, Japanese Patent Application Laid-Open No. 1-21 of the present application in which a supply hole for supplying a content liquid using a laser beam is provided.
Although there is a Japanese Patent No. 77506 publication, this is located at the center of the end face after fusion of the ear neck, and the portion corresponding to the life hair is missing, so there is no problem when pursuing only the application function like a makeup brush, but a brush When writability equivalent to is required, the required function cannot be satisfied.

[0010]

DISCLOSURE OF THE INVENTION The present invention has solved the above-mentioned problems, and an object of the present invention is to provide a through hole for supplying a content liquid at the center of the end face after fusion of the spike neck. It is intended to provide a method for producing an ear neck of a brush pen which is formed and is the same as a writing brush in which vital hair is concentrated on one point of the tip without missing the vital hair.

The structure of the present invention will be described in more detail below.

That is, the bristle material usually has a length of about 50 mm.
Is available as a bundle of hair 1 having a diameter of about 50 mm, and when the taper pointed end 3 of the bundle of hair 1 is placed downward and vibration is repeatedly applied on a flat surface. The tips of the individual filaments are aligned on the plane.

In this state, the hair bundle 1 is transferred to a square mold 4 having a flat bottom surface, and a sliding wall 10 which is one of the side walls of the mold 4 is pushed and slid to crush the hair bundle 1 into a square, and a predetermined size is obtained. When the bulk density is crushed, this state is maintained, the first masking plate 7 is covered and positioned from above, and the energy beam 11 is irradiated to fuse the non-mask portion 5.

Basically, the non-mask portion 5 has a circular shape corresponding to the rear fusing surface 13 of the brush neck of one brush pen. In this case, the brim 8 has a supply hole penetrating the fusing surface 13. 9 has to be formed, a circular middle mask portion 6 is further provided at the center of the non-mask portion 5, and a supporting mask portion 12 is formed from the front or rear or the left and right to support the middle mask portion 6. It supports the part 6 as a bridge.

The inner mask portion 6 has a pointed pile 14 hanging down like a tack, and is fixed by piercing the rear cross section 2 of the hair bundle 1. Here, the support mask portion 12 for supporting the above-mentioned middle mask portion 6 is no longer needed because the middle mask portion 6 is pierced and fixed in the rear cross section 2, and once removed and irradiated with an energy beam, once. However, in consideration of the recovery of the pile 14 driven into the rear cross-section 2 and the like, it is better to fix the pile 14 to the masking plate 7 and to irradiate the energy beam in two times. Whether or not it is good depends on the point of view.

According to the experimental results, in the case of the single irradiation, the work of recovering the anti-14 in the post-process is complicated, whereas in the case of the double irradiation, the hair of the support mask portion 12 is removed when the masking plate is removed. The work of collecting the piles 14 can be omitted except that the material easily comes out together with the piles 14, and there is no difference in terms of quality.

[0017]

According to the method of the present invention, the supply hole 9 for the content liquid is formed in the center of the head neck rear fusion surface 13 of the ear neck 8. The unmasked portion 5 is irradiated with the energy beam 11 through the masking plate 7, This is made by fusing the hair bundle 1 and the rear cross-section 2 of the irradiation part. Since the fusing is the instantaneous surface heating, the fusing keeps the state at that time, is extremely strong, and the energy beam is extremely strong. Since the straightness is high, the boundary between the masked portion and the non-masked portion can be clearly divided, and it is not necessary to form a contour with a heat punch after the conventional heat fusion and divide it into small portions.

This means that, for example, when a hot stamp having a shape corresponding to the head neck rear fusion surface 13 is used on the back cross section 2 of the hair bundle 1, the contour is clear and the ear neck with a strong fusion surface is obtained. From the point of view that there is no such thing, it can be easily assumed that a remarkable effect is being expressed.

In this case, since the mask portion maintains the original state in which the mask portion is not subjected to any heat history, the bristle material corresponding to the mask portion can be reused.

Further, since the anti-mask 14 hangs down in the middle mask portion 6, the hair material corresponding to the supply hole 9 formed by the bulk density of the rear cross section 2 of the hair bundle 1 increasing around the driven pile 14. Remains in a state of being absorbed by the strain, and the finished ear neck 8 extends from the ear neck rear fusion surface 13 to the tip of the ear neck, and the hair material released from the strain corresponding to the supply hole 9 naturally recovers due to elastic recovery. It will be concentrated at one point in the center of the neck, leaving the life hair, which is also called the life of the writing brush.

The other advantage of the hair bundle fusion using the energy beam is that there is no other example, since only the surface to be fused is efficiently and instantaneously fused, and the surroundings are hardly heated. The boundary with the adhesion surface is not ambiguous, and the fusion surface including the end surface is necessary and sufficient, and the non-fusion surface has no thermal history. The ability to reuse the material is significant because the hair material, including synthetic fiber hair, is expensive.

Furthermore, the fact that the hair fibers can be fused under the condition that local stress is applied contributes to the quality of the ear neck. It is possible to provide an ear neck having a through hole and sufficiently satisfying the function of a brush in which the tip of the brush tip is densely concentrated at one point in the center.

In the present invention, the energy beam includes a laser beam and a heat beam in which light from a halogen lamp is reflected by a gold-plated mirror surface and focused.

[0024]

[Example] Toray tapered bristle (polyester) having a wire diameter of 0.16 mm and a diameter of 50 mm and a length of 38 mm bundled into a taper-shaped sharpened surface are aligned and the length is 50 mm, the width is 50 mm, and the height is 35 mm. It was inserted into the mold and one side of the mold was pressed to 40 mm.

While keeping the state, the masking plate having a stake is put on the middle masking part, and the masking part supporting the stake is removed to expose the non-masking part to irradiate a laser beam to the masking plate. After removing the pile, the pile was taken out, and the formed fused portion was taken out. As a result, it was possible to obtain an ear neck in which the bristle portion in which each bristle material was concentrated was concentrated in the center of the tip.

The laser beam oscillator used was an ML-5S2 carbon dioxide gas laser oscillator manufactured by Mitsubishi Electric Corp., which was irradiated at a wavelength of 10.6 μm and a power of 0.5 KW.

[Brief description of drawings]

FIG. 1 is a perspective view of a hair bundle.

FIG. 2 is a perspective view showing a state in which a hair bundle is inserted into a mold and pressed.

FIG. 3 is a partially cutaway enlarged perspective view of a masking plate covering and irradiating an energy beam.

FIG. 4 is a perspective view of an ear neck manufactured according to the present invention.

FIG. 5 is a perspective view of a state in which a pile hangs from a masking plate.

[Explanation of symbols]

 1: Hair bundle 2: Rear cross section 3: Sharp edge 4: Form frame 5: Non-mask part 6: Middle mask part 7: Masking plate 8: Ear neck 9: Supply hole 10: Sliding wall 11: Energy beam 12: Support Mask part 13: Fuselage back fusion surface 14: Pile

Claims (3)

[Claims] 1. A sharpened tip end surface of a sharpened taper-shaped fiber bundle is flattened, and the tip end face is inserted into a formwork, and the formwork is pressed to bring the fiber bundle to a predetermined bulk density. A masking plate is covered in a maintained state, an energy beam is radiated through the masking plate, and the fiber rear section under the non-masked surface formed in the contour of the masking plate in a predetermined shape is fused to make a writing pen. In the method of manufacturing an ear neck corresponding to the thickness of the ear neck, the non-mask surface of the masking plate is circular, and a middle mask portion is formed at the center of the circle like an island floating in the sea. The middle mask portion is formed with sharply tapered piles hanging vertically to the surface of the masking plate, and is supported by the masking plate supported by two points on the front and rear sides of the masking plate and by two points on the left and right sides. trout There are two types of king plates, one of the masking plates is used to insert the pile into the rear cross section of the fiber bundle, and after irradiation with an energy beam,
The other masking plate is used to insert the pile into the rear cross section of the fiber bundle, and by irradiating with an energy beam, the supporting mask portion supporting the middle mask portion is erased, and a fusion bonding having a through hole in the center is performed. A method for producing an ear neck with a pen hole, characterized by forming a surface. 2. A support mask portion is attachable to and detachable from the middle mask portion and the masking plate, and after the pile serving as the middle mask portion is inserted into the rear cross section of the fiber bundle using the masking plate, the inserted pile is removed. The manufacturing of the ear neck with a penetrating hole according to claim 1, wherein the supporting mask portion is removed from the pile and the masking plate to expose the entire non-mask portion, and the energy beam is emitted only once. Method. 3. The method for producing an ear neck with a pen hole according to claim 1, wherein the energy beam is a laser beam.