JP2000093233A - Bristle planting machine for brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To largely reduce abrasion or fraying phenomenon of a hair planting mechanism part which is reciprocated at high speed, stably use it for a long period, and prevent generation of troubles such as deterioration of size precision or productivity. SOLUTION: This machine is provided with a moving part 4 to reciprocate at high speed while two-folding a bundle of bristles along a flat line and planting it to a brush head part, and a housing part 5 to slidably surround and pivotally support the moving part 4. In this case, carbide cermet films (a)-(c) by thermal spraying are formed on a contact surface on either side of the moving part 4 and the housing part 5 of a hair planting mechanism part, and Si3N4 ceramic films (d)-(g) by sintering are applied to a contact surface on the other side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush hair transplanter for implanting a bristle bundle into a brush head of a brush product such as a toothbrush, a hairbrush or a clothes brush.
The present invention relates to a brush flocking machine that does not require the use of a lubricating oil that easily causes stains on hair.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional example. FIG.
FIG. 4 is a perspective view showing a main part structure of a flocking mechanism section in a conventional toothbrush flocking machine, and FIG. 4 is an exploded view thereof. The flocking mechanism section 1 is carried in and fixed to a fixed position by a brush holding jig 2. It comprises a moving part 4 that reciprocates at high speed toward the brush head part 3 of the toothbrush, and a housing part 4 that slidably surrounds and supports the moving part 4.

[0003] The moving section 4 includes an elongate shuttle section 41 having a spear-shaped tip, a reciprocating bar 42 arranged to further reciprocate on the shuttle section 41 reciprocating, and a reciprocating bar 42. And a flocked needle 43 whose base end is connected to it and reciprocates together. The shuttle section 41 is reciprocated at a high speed of about 700 to 800 times per minute by a drive device (not shown), and the reciprocating bar 42 and the flocking needle 43 are reciprocated by a reciprocating mechanism (not shown) to perform flocking. At the tip of the needle 4, the bristle bundle 9 is
The hair is to be planted.

The shuttle portion 41 is composed of a plurality of members 41a to 41d (FIG. 2), and the shuttle bar 41 is inserted into a needle groove 41e formed on the shuttle portion 41.
2 and the flocking needle 43 are slidably inserted into the member 41a.
To 41d are integrally assembled by screws 41f.

On the other hand, the housing part 5 is composed of a plurality of (three in the illustrated example) block pieces 51, 52, 53 (FIG. 2), and the moving part 4 is slid by the block pieces 51 to 53. After movably surrounding, screws 54, 55
Are assembled together. This housing part 5
Is for slidably guiding the moving portion 4 which reciprocates at high speed, is fixedly mounted on a base portion of a flocking machine main body (not shown), and fixes the entire flocking mechanism portion 1 in a fixed position. ing.

The flocking operation of the flocking mechanism 1 having the above structure will be described with reference to FIG. FIG. 5 shows only the main part of the flocking mechanism 1 and its surroundings. In order to make the operation easy to understand, the flocking mechanism 1 is omitted by moving the housing 5. Only the main part of No. 4 is shown.

First, the picker 7 for scraping the hair is rotated, and the hair for one hole is scraped from the hair bundle 8 to form the hair bundle 9 for flocking. Then, the hair bundle 9 formed of the plurality of brushed hairs is rotated to the position of the needle groove 41e of the moving unit 4 and set at the position. Further, at the same time, a flat wire 11 is intermittently fed by a certain dimension from the flat wire bundle 10 wound with a flat wire (metal piece) for hair bundle driving by a flat wire feeder (not shown). Flat wire cutter 12 provided
Thereby, the flat wire 11a that has entered the moving section 4 is sheared.

Next, the reciprocating bar 42 of the moving section 4 is advanced, and the flocking needle 43 connected to the reciprocating bar 42 pushes the flat line 11a cut to the fixed size toward the front side. Then, the flocking needle 43 further advances, and the needle groove 4
The hair bundle 9 waiting on 1e is pushed together with the flat wire 11a. As a result, the hair bundle 9 is folded in two along with the flat wire 11a and pushed into the needle groove 41e.

In this state, when the shuttle portion 41 moves forward and the tip of the shuttle portion 41 comes closest to the brush head 3, the flocked needle 43 is driven out of the tip of the shuttle portion 41 by a predetermined distance, and is caused by the flat line 11a. The two-folded hair bundle 9 is driven together with a flat line into the flocked hole 6 of the brush head 3 to perform flocking.

After the flocking of the hair bundle 9, both the shuttle portion 43 and the flocking needle 43 are retracted to their original positions, and the above operation is repeated again. In this manner, the bristle bundles 9 are implanted in all the implanted holes 6 of the brush head 3 of the toothbrush.

[0011]

By the way, mechanical structural members generally involving a reciprocating motion and a rotating motion have problems such as a reduction in dimensional accuracy and a loss in productivity due to wear and abrasion phenomena. For this reason, the following wear-resistant measures are usually taken for the sliding portion which is worn by reciprocating motion or rotating motion.

(1) A structural member is made of a hard material having excellent wear resistance. (2) Use harder ceramic materials instead of steel members. (3) The steel member is hardened by a treatment such as carburizing, nitriding, or quenching. (4) Hard chrome plating and hard electroless NiP plating are applied. (5) Physical evaporation (PVD) or chemical vapor deposition (CV)
According to D), TiN, TiC, T
A hard ceramic coating such as iCN is applied. (6) A film of a hard metal, ceramics, cermet or the like is formed by thermal spraying.

As described above, the conventional measures against wear have been to harden the contact portion and to suppress the friction phenomenon caused by sliding or rotating motion. However, as is well known, in order to prevent the abrasion phenomenon, simply hardening the contact surface does not provide sufficient results, and is greatly affected by the material of the contact partner. For this reason, at present, the choice of abrasion measures is made only experimentally and empirically, and the mechanism and theoretical basis have not yet been established.

As described above, in the case of the brush flocking machine to which the present invention is applied, the moving portion of the flocking mechanism is moved at a rate of 70 minutes per minute.
While reciprocating at a high speed of 0 to 800 times, a bundle of thin synthetic resin bristles (filaments) is folded in two by a metal piece called a flat wire, and is implanted into a flocked hole of a brush head to implant hair. ing. For this reason, the moving portion that repeats reciprocating motion at high speed repeatedly frictions with the housing portion, and is characterized by being constantly worn or damaged by heat generation. However, as a countermeasure against the wear, even if the above-mentioned methods (1) to (6) are applied as they are, sufficient results have not yet been achieved.

SUMMARY OF THE INVENTION The present invention has been made to solve the following problems of a brush flocking machine. (1) Eliminates the need to use lubricating oil, which tends to cause stains on hair. (2) The flocking mechanism that reciprocates at a high speed of 700 to 800 times per minute generates heat in a short time in a contact portion between the moving portion and the housing portion, and then causes a seizure phenomenon, thereby prolonging a normal operation. Can't continue over time. (3) In the case of a brush flocking machine of this type, especially a brush flocking machine for a toothbrush, strict sanitary control is required, and a large amount of lubricating oil causing contamination cannot be used. The phenomenon cannot be avoided. For this reason, even if hard chrome plating is applied to the surface of the contact portion, not only does the hardness decrease due to heat generation, but also a pseudo-adhesion phenomenon occurs, and maintenance-free operation cannot be performed for a long time. (4) If the frequency of replacing members is increased due to wear or seizure of the flocking mechanism, the productivity of the brush decreases, and it is necessary to keep many workers.
This will increase costs.

[0016]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a moving part for folding a bristle bundle in two at a high speed while reciprocating at a high speed, and implanting the hair into a brush head.
In a brush flocking machine provided with a flocking mechanism configured by a housing portion slidably surrounding and supporting the moving portion, any one of contact surfaces between the moving portion of the flocking mechanism portion and the housing portion. A carbide cermet film is formed on a contact surface on one side by a thermal spraying method, and Si ₃ N ₄ ceramics is adhered on a contact surface on the other side by a sintering method.

[0017] The carbide cermet film is composed mainly of WC alone or WC and Cr ₃ C ₂ as a carbide, and further contains one or more metals selected from Co, Ni and Cr as metal components by weight. Use a cermet containing in the range of 5 to 35%,
It is preferable that the film is formed under a flight speed condition of 0 m / s or more. The film thickness is 10 to 500 μm, the porosity is 0.1 to 1.0%, and the surface roughness is Ra0.
It is preferable to finish to 1 to 5 μm.

The Si ₃ N ₄ ceramic preferably has a surface roughness Ra of 0.05 to 0.1 μm.

[0019]

Embodiments of the present invention will be described below with reference to FIG. In the drawings, the same or corresponding parts as those of the above-described conventional example (FIGS. 3 to 5) are denoted by the same reference numerals, and detailed description of each part is omitted.

In the case of the toothbrush flocking machine according to the embodiment shown in FIG. 1, of the outer peripheral surface of the moving portion 4 which is in sliding contact with the inner peripheral surface of the housing portion 3, the left and right side surfaces and the lower bottom surface a , B, and c, a carbide cermet film (portion indicated by hatching) is formed by thermal spraying, and
The inner peripheral surfaces d, e, f, and g of the housing portion 5 that are in sliding contact with
It is obtained by sticking Si ₃ N ₄ ceramics (parts indicated by cross hatching) by a sintering method. Thus, by forming the carbide cermet film by the thermal spraying method and the Si ₃ N ₄ ceramics by the sintering method on the contact surfaces of each other, the abrasion and abrasion phenomena of the flocking mechanism 4 reciprocated at a high speed are greatly reduced. can do. For this reason, it is not necessary to use a lubricating oil that is likely to cause stains on the hair, and it is possible to use the lubricating oil stably for a long period of time without lubricating oil.

As described above, according to the present invention, a carbide cermet film formed by spraying and a S
Because it is formed of i ₃ N ₄ ceramics,
Hereinafter, these points will be described in detail.

[I] Adoption of Thermal Spray Method and Selection of Thermal Spray Material In the thermal spray method, powder materials such as metals, ceramics and cermets are melted by the combustion energy of plasma or flammable gas, and this is sprayed onto the surface of the base material to form a film. This technique has been used to improve the wear resistance by applying a hard metal, ceramics, or cermet film. However, even if the thermal spraying method and the thermal spraying material based on the conventional knowledge are applied as they are to form a hard coating, a sufficient function cannot be exerted. Then, the present inventors conducted experimental studies on the following items (1) to (4).

(1) Thermal spraying source: plasma and flammable gas
Comparison of combustion flames. (2) Flight speed of thermal spray material particles: Fly through the above heat source
The velocity of the sprayed material particles in the range of 100 to 350 m / s
It is variable and selects conditions for forming a film suitably. (3) Kind and particle size of thermal spray material: Hard
Al as material₂O₃ And carbonized cermet
These are selected taking into account the results of (1) and (2) above.
Was. (4) Combination of thermal spray coating and mating material: selected
Abrasion test for suitable mating material for thermal spray coating
And actual machine tests. About the above items
As a result of repeated experiments and research, the thermal spray coating used in the present invention
Was determined as follows.

(1) As a thermal spraying heat source, the plasma has a high thermal energy, so that it is suitable because it sufficiently melts both Al ₂ O ₃ and a carbide cermet material. However,
A close observation shows that Al ₂ O ₃ does not deteriorate at all when melted, but carbides oxidize or decompose in the case of carbide cermet, which causes pores in the thermal spray coating and a decrease in adhesion. Was.

On the other hand, the combustion flame of the combustible gas has a temperature of 20.
Since the temperature is about 00 to 3000 ° C., Al ₂ O ₃ cannot be completely melted. For this reason, the film becomes porous, and the adhesion becomes weak. On the other hand, the carbide cermet material was less likely to be oxidized and decomposed, and could form a coating without impairing the properties of the thermal spray material. However, even if the combustion flame of the combustible gas is used, if the velocity of the sprayed particle material flying in the heat source is low, a good film cannot be obtained. Therefore, the flying speed of the particles should be 200 m / s or more. Alone, it was confirmed that a dense and good-adhesion film could be obtained.

(2) The thermal spray material is Al
_{Both 2} O ₃ and carbide cermet are harder than steel materials and have excellent wear resistance. However, Al ₂ O
_{The three} coatings had lower adhesion to the steel substrate than the carbide cermet coating, and were also weak against mechanical impact. Therefore, carbide cermet was used as the thermal spray material.

As the carbide cermet material, WC, C
r ₃ C ₂ , NbC, B ₄ C, VC, TaC, Hf
Cermets containing carbides such as C and one or more metal components such as Ni, Cr and Co are preferred, especially WC or WC.
And a carbide cermet containing Cr ₃ C ₂ have been found to be suitable.

On the other hand, the amount of the metal component added to the carbide may be in the range of 5 to 35% by weight, and if the cermet is less than 5%, the film becomes hard but brittle, the bonding force between particles becomes small, and the Cracks are likely to occur even when subjected to a mechanical impact. On the other hand, if the metal component exceeds 35%, the adhesion of the film is improved, but the hardness is reduced, and the abrasion resistance is deteriorated.

Considering the above experimental results and the environmental conditions in which the film of the present invention is used, WC or WC and Cr ₃ C
_The cermet sprayed coating containing No. ₂ was selected, and then the selection of the mating material was determined by a wear test.

[II] Selection of partner material by wear test FIG. 2 shows a wear test device. Thermal spray coating 9
The test piece 91 on which the sample No. 6 was formed was fixed horizontally, and a disc 93 provided at the tip of the rotating shaft 22 was pressed against the surface of the test piece 91, and this was adjusted to rotate 700 times for one minute. Also, the rotating shaft 9
2, a load 94 can be applied to the upper portion thereof, and various coatings or materials serving as a mating material 95 are attached to the disk portion 93 of the rotating shaft 92, and changes in the appearance of both surfaces due to contact with the thermal spray coating 96. It was determined by observation.

As the mating material 95, TiN, TiCN, CrN, TiAl formed by PVD or CVD are used.
N, diamond-like carbon (DLC), etc.
Hard Cr plating, ceramic sintered material (Al
₂ O ₃ , Si ₃ N ₄ ), high speed steel (SKH5
1) and so on were tested. In addition, contrary to FIG.
A thermal spray coating 96 was formed on the disk portion 93 side of the test piece 91, and a test was also conducted when a mating material 95 was attached to the surface of the test piece 91.

The details of these test results will be described in detail in the examples below. The thermal sprayed coating used for the purpose of the present invention has a thickness formed by WC cermet or WC-Cr ₃ C cermet. It has been found that those having a range of 10 to 500 μm and a surface roughness Ra of 0.1 to 5 μm are optimal. A film having a thickness of less than 10 μm is difficult to form by thermal spraying, and a film thickness of 500 μm or more does not change its performance, and is not economically advantageous. Further, the surface roughness is 0.
A surface finish of 1 μm or less does not change its effect, although it takes a long time for processing, and a roughness of 5 μm or more has a drawback that the mating material is easily damaged.

[0033]

[Example 1] In this example 1, Al ₂ O ₃ , WC-12% Co, WC-2.
By _5% CR ₃ C 2 using three kinds of -20% Ni-5% Cr, plasma spraying and high velocity flame spraying method,
After forming a 150μm thick film on each carbon steel,
The microhardness, porosity, and adhesion of the film to carbon steel were measured. Table 1 summarizes the results of these tests.

[0034]

[Table 1]

As is clear from the results in Table 1,
Films formed by thermal spraying using Zuma as a heat source are
Low hardness, high porosity and close adhesion regardless of type
It turned out to be weak. In contrast, with high-speed frames
The sprayed coating is Al₂O ₃About porous and dense
The adhesion was relatively low, but the carbide cermet film
Is hard and dense and has extremely good adhesion
Was observed. The high-speed frame used in this embodiment
In the thermal spraying method, the flying speed of the thermal spray material particles is 210 to 230.
m / s.

Example 2 In Example 2, an abrasion test was performed by using the abrasion test apparatus shown in FIG. 2 using the thermal sprayed coating test piece obtained in Example 1. As a mating member (member 95 attached to disk portion 93 in FIG. 2), the following film or sintered material was selected, and a test was performed under the condition of 700 rpm for 1 minute. PDV film: TiNi, TiC, TiCN, CRN (5 μm each) Electroplating: Hard Cr (30 μm thickness) Sintered material: Si ₃ N ₄ (1 mm thickness) Others: DLC (diamond-like carbon, 1 μm thickness) )

Table 2 shows the test results.

[0038]

[Table 2]

As is clear from the results in Table 2, Al
₂ O ₃ of the thermal spray coating is plasma spraying, in both high-speed flame spraying, both of the thermal spray coating and coating of the mating member in a short period of time is broken. On the other hand, the carbide cermet sprayed coating is more excellent in abrasion resistance than the Al ₂ O ₃ coating, and in particular, the coating obtained by the high-speed flame spraying method (No. 4 in Table 2,
In 6), even in the abrasion test for 5 minutes, there was no damage including the film of the mating material, and a favorable state was maintained.

Further, as a result of conducting a continuous test for more than 20 minutes, the DLC film and the PVD film are thin and the damage of the film starts to appear due to the thin film thickness, and the hard Cr plating is also severely damaged. Turned out to be unbearable.

From the above results, it was concluded that the combination of the carbide cermet coating by the thermal spraying method and the Si ₃ N ₄ ceramics by the sintering method was the best.

In the embodiment described above, the moving unit 4
Carbide cermet film formed on the outer peripheral surface of, but was attached to Si ₃ N ₄ ceramic to the inner peripheral surface of the housing portion 5, on the contrary, paste Si ₃ N ₄ ceramic to the mobile unit 4 side, housing unit A carbide cermet film may be formed on the fifth side.

The position of the carbide cermet film to be formed on the contact surface and the position of the Si ₃ N ₄ ceramic to be adhered to the contact surface are determined by the moving portion 4 and the housing portion constituting the flocking mechanism 1. 5 relative shape, arrangement (horizontal arrangement, vertical arrangement, diagonal arrangement, etc.), contact state,
Naturally, it should be set to an optimum state according to the contact area, the relative moving speed, and the like.

Although the above-described embodiment has been described taking the case of a toothbrush flocking machine as an example, the present invention is not limited to this, and other brushes such as a hairbrush and a clothing brush may be used. Can also be applied to a hair transplanter for the same.

[0045]

As described above, according to the present invention,
Contact surface between the moving part and housing part constituting the flocking mechanism
Of the contact surface on either side
Form a cermet film and contact the other side
The surface is made of Si₃N ₄Paste ceramics
Wear and abrasion of the flocking mechanism reciprocating at high speed
The phenomenon can be greatly reduced, causing the stains on the hair
That the use of lubricating oils
In addition, the excellent effect that it can be used stably for a long time
Play a fruit. In addition, the dimensions may be reduced due to wear or seizure.
Prevent problems such as loss of productivity and loss of productivity
be able to.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a structure of a wear test device.

FIG. 3 is a perspective view showing a structure of a main part of a flocking mechanism in a conventional flocking machine for a toothbrush.

FIG. 4 is a schematic exploded perspective view of FIG.

FIG. 5 is a schematic perspective view showing a main part structure of a flocking mechanism and its peripheral portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flocking mechanism part 2 Brush holding jig 3 Brush head part 4 Moving part 5 Housing part 6 Flooding hole 7 Picker 8 Hair bundle 9 Hair bundle 10 Flat wire bundle 11 Flat wire 11a Flat wire cut to fixed size 12 Flat wire Cutter 41 Shuttle part 42 Reciprocating bar 43 Flocking needle 51-53 Block piece

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kensaku Okamoto, Inventor Kensaku Okamoto 1-3-7, Honjo, Sumida-ku, Tokyo Inside Lion Corporation (72) Inventor Yoshio Harada 4--13, Fukae-Kitacho, Higashinada-ku, Kobe, Hyogo Prefecture No. 4 Inside Talkaro Co., Ltd. (72) Inventor, Captain Hashimoto 1 Futami, Futami-cho, Akashi-shi, Hyogo Prefecture 1 F-term inside the Akashi Factory (reference) 3B202 AA06 AA11 AA19 AB10 AB19 EG16 JA03

Claims (2)

[Claims] A moving unit for folding a bristle bundle in two at a high speed while reciprocating at a high speed and implanting the bristle in a brush head unit;
A brush flocking machine provided with a flocking mechanism configured by a housing portion that slidably surrounds and supports the moving portion, wherein any one of contact surfaces between the moving portion of the flocking mechanism portion and the housing portion. A flocking machine for a brush, wherein a carbide cermet film is formed on one contact surface by a thermal spraying method, and Si ₃ N ₄ ceramics is adhered on a contact surface on the other side by a sintering method. 2. The carbide cermet film contains WC alone or WC and Cr ₃ C ₂ as main components as a carbide, and further contains at least one metal selected from Co, Ni, and Cr as a metal component. Using a cermet containing 5 to 35% in a high-speed flame heat source
/ S or more at a flight speed condition of more than 10
And a porosity of 0.1 to 1.0% and a surface roughness Ra of 0.1 to 5 μm. The Si ₃ N ₄ ceramic has a surface roughness of Ra 0.
The brush flocking machine according to claim 1, characterized in that it has a thickness of from 0.5 to 0.1 m.