KR100900805B1 - Brush-hairs taperprocessing method by mechanical method - Google Patents

Abstract

A taper processing method of the brush of the toothbrush is provided, in which the work efficiency is improved and the generation of the thermal transformation can be prevented. A taper processing method of the brush of the toothbrush comprises: a step of connecting a plurality of grinding drums parallel to each other; a step of arranging the grinding drums in order that the height of the protrusion formed in each grinding drum becomes successively small; a step of consecutively polishing the toothbrush in which the general brush is transplanted while passing through the each grinding drum; and a step of disposing so that the end part of the brush of toothbrush can come in contact with the bottom part between the protrusions(11).

Description

Brush taper processing method by mechanical method {Brush-hairs taperprocessing method by mechanical method}

The present invention relates to a method of tapering bristles, and more particularly, to a method of tapering bristles by a mechanical method using a polishing drum having protrusions.

Toothbrushes in which the tip of the needles are planted have a better penetration and flexibility between teeth or into the periodontal pocket, compared to toothbrushes in which the round tips are rounded.

The method of preparing the acicular hair is pre-tapered by (i) dissolving the tip using strong acid or strong alkali, (ii) polishing the tip using a polishing machine after planting, and (iii) (i). After planting, there is a method of polishing by the method of (ii). The term “preliminary taper” here means less tapered so that the thickness of the tip is 0.03 ~ 0.10mm.

Through the method of (i), it is possible to obtain a highly tapered acicular hair having a taper length of 5 mm or more and a relatively thick end portion of about 0.01 mm. These needles have a long taper length, which is excellent in flexibility and excellent in permeability due to a small degree of thickening at the end. However, it is difficult to precisely control the dissolution time during tapering and has a high defect rate, and has a problem in that the working environment is very poor.

The method of (ii) has a problem that the workability is excellent, but the tapered length of the acicular hair obtained is short within 2 mm, and thus there is a possibility of damaging the gums when brushing due to lack of flexibility.

The method of (iii) solves the problems of the method of (i) and (ii) to some extent, and this method is disclosed in Korean Patent No. 261658 and No. 421454 by the inventor. Korean Patent No. 261658 is a manufacturing method of immersing and dissolving in strong acid or strong alkali solution until the length of hair shortens shortly, and then washing and drying to plant in the head of the toothbrush and polishing the end with a grinder. The taper length is about 5mm long, so the flexibility is excellent, but the thickness of the tip is 0.04 ~ 0.08mm, which is relatively large, so that the permeability is insufficient. If the polishing process is further performed to reduce the degree of backlash, the taper length is shortened and the flexibility is insufficient.

Korean Patent No. 421454 is similar to Korean Patent No. 261658, but in order to improve the permeability, it is polished so that the thickness of the tip is within 0.02mm. The permeability is excellent, but the taper length is only 2.8 ~ 3.5mm and it is flexible. There is a problem that this lack and a lot of defects occur during manufacturing.

As a technique for solving the problems of the prior art, Korean Patent No. 666457 by the present inventor can be mentioned (hereinafter, referred to as "prior art").

This prior art has been described as “a tapered end of a general bristle, with a protrusion 11 having a height of 1.5 to 7 mm and a distance between the protrusions 11 having a length of 1 to 5 mm and rotating simultaneously in the longitudinal and horizontal directions. Polishing with a grinder ”(see Fig. 1), and the needle hair obtained thereby is 0.01 to 0.02 mm in diameter at the tip and 3 to 7 mm in taper length, the same level as the needle hair obtained by chemical deposition. This technique enables the acquisition of needle-shaped hairs with the desired end thickness and taper length without the need to deposit on unknown chemicals.

However, the bristles obtained by the prior art have a problem that thermal deformation occurs due to heat generated during polishing. If thermal deformation occurs, the bristles will bend and deteriorate.

In addition, in Korean Patent Application No. 10-2007-7027084, the grinding wheel is polished with a drum-type grinder having no projections 11 formed therein (first polishing step), and then the drum-shaped grinder having projections 11 is polished ( 2nd to 3rd polishing process), and finally finishing with a rotating drum (fiber polishing process) having fibers placed on the surface (third polishing process), but the rotation speed of the polishing machine is also 500 to 1500rpm in the second polishing process In the third polishing step, the thermal deformation of the bristles obtained because of being very high at 1000 to 2000 rpm is inevitable. When the thermal deformation occurs, the tip portion of the taper is bent and irregularly polished, resulting in no commerciality.

In addition, the technique reduces the friction area by fixing the planted toothbrush, which is a polished body, to move the position of the polishing machine up and down during polishing in order to reduce the generation of frictional heat. Thereby, the occurrence of frictional heat is reduced, but the problem that the heat of friction generated in the deep space between the projections and the projections 11 is still accumulating, and in particular, there is a problem that the polishing of the end of the simulation is insufficient. The tip of the hair is effectively polished only when it is in contact with the “P part”, which is the bottom between the protrusions 11, as shown in FIG. 2, but the tip of the hair is “P” in a manner of moving the polishing machine having the same high protrusion 11 up and down. Part ”. In addition, the first polishing process and the fourth polishing process of this technique can be regarded as a dance process that is unnecessary for obtaining the acicular hair.

The present invention is a further improvement of the prior art, and an object of the present invention is to provide a taper treatment method capable of tapering bristles by a mechanical method and preventing occurrence of thermal deformation. Another object of the present invention is to provide a taper processing method with improved work efficiency.

The present invention uses a polishing drum which has a projection and rotates vertically and horizontally, continuously arranging polishing drums having different projection heights, and sequentially moving non-tapered toothbrushes brushed with regular bristles to each of the arrayed polishing drums. While grinding the ends of the cultivated wool.

The term "planted toothbrush" includes a toothbrush planted in a manner in which the bristles are fixed with anchors, as well as a toothbrush planted in a manner in which the bristles are fixed without anchors, and the hair is cut into a specific shape after planting or planting in various forms. It also includes a toothbrush.

Hereinafter, the present invention will be described in detail.

A polishing drum used in the present invention is shown in FIG. Many projections 11 are formed on the surface of the polishing drum 10 and are coupled to the rotor 30 by the rotation shaft 20 so that they can rotate simultaneously in the longitudinal and transverse directions.

Proper height of the projections 11 is 1.5 ~ 7.0mm, as described above it can be obtained needle needles with a taper length of 5mm or more when polishing with such a polishing drum.

However, when polishing with a polishing drum, a lot of heat is generated, accompanied by thermal deformation of the brush head. The method of spraying water to prevent thermal deformation may also be considered. However, spraying water may not be adopted because the polishing force of the polishing drum is sharply lowered.

In the present invention, by thoroughly controlling the heat generated during the polishing process to prevent thermal deformation of the bristles.

The method of controlling the heat generated during the polishing process is based on a method of reducing the rotational speed of the polishing drum to within a specific range and adjusting the height of the projection 11.

When the polishing drum rotates at a high speed, frictional heat is generated a lot so that the rotational speed should be adjusted in the range of 200 to 500rpm, more preferably 250 to 480rpm. In the case of exceeding this range, thermal deformation occurs. In the case of less than this range, the polishing efficiency is rapidly lowered and the productivity is excessively lowered. As for the lateral rotation speed, about 1/3 of a longitudinal rotation speed is suitable.

However, merely adjusting the rotational speed of the polishing drum does not achieve the object of the present invention. The projections 11 of the same height are formed and thermal deformation occurs even when polishing with a polishing drum rotating at a low speed. The reason is that in order to obtain the hair with the desired taper length, an abrasive drum with a projection 11 of 3 mm or more, more preferably 5 mm or more, should be used. This is because the heat accumulation of frictional heat in the space is inevitable, and the heat radiation ability is also insufficient.

In the present invention, while reducing the rotational speed of the polishing drum, by connecting a plurality of polishing drums in parallel so that the polishing operation continues sequentially. The grinding drums connected in parallel should be at least 15, more preferably at least 20. If the toothbrush, which is the abrasive, stays in each polishing drum for a period of time and then moves to the next polishing drum, instantaneous air cooling occurs when the toothbrush moves to prevent thermal deformation. That is, friction heat is generated during polishing and cooling action is continuously performed when the bristles move, and the temperature between the temperature of the polishing drum and the projection 11 is maintained at a thermally stable state.

In order to prevent thermal deformation of the bristles and at the same time maximize the production efficiency, it is appropriate to use 15 to 30 abrasive drums. If it is less than this range, the thermal deformation of the bristles during polishing or lack of production efficiency, and even if it exceeds this range, there is no further anti-deformation effect and only the price of the machine increases.

Height adjustment of the projection 11 is also an important factor controlling the heat generated. The role of the projection 11 is to lengthen the length of the taper to be formed, it is selected within the range of 1.5 ~ 7.0mm. The projection 11 of the polishing drum which is initially polished among the plurality of polishing drums participating in the continuous polishing operation is suitably in the range of 5 to 7 mm. This is because a desired level of taper length is obtained.

However, as the height of the projection 11 increases, the friction area increases, so that not only a large amount of frictional heat is generated during polishing, but also a phenomenon in which the generated frictional heat is more accumulated in the space between the projections 11 and the projections 11. Will occur. Therefore, after the taper of the desired length is formed it is necessary to gradually reduce the height of the projection (11).

The height of the projections 11 formed in the polishing drum participating in the polishing operation in the middle is 3 ~ 5mm, the height of the projections 11 formed in the polishing drum participating in the polishing operation is about 1.5 ~ 3.0mm is appropriate.

When the height of the projections 11 formed on the polishing drum is sequentially reduced as described above, not only a taper length of a desired level can be obtained, but also the frictional heat generated by friction is significantly reduced, and the generated frictional heat is easily released to the outside. This can effectively prevent thermal deformation of the bristles.

Further, by sequentially decreasing the height of the projection 11, in each polishing drum, the end of the simulation is continuously in contact with the “P” portion of FIG. 2, which is the bottom between the projections 11, so that the rear end of the projection is 0.02. Highly polished to within mm

The meaning of "reducing the height of the projections 11 in sequence" means that the heights of the projections 11 are completely arranged in order from the highest to the lowest, as in the embodiment of the present invention, although not partially sequentially. It is meant to include a case where a lot of the height of the projection 11 is arranged at the beginning of polishing, and a lot of a height of the projection 11 is arranged at the end of the polishing.

The interval between the protrusions 11 is preferably about 1 ~ 5mm, if the thickness of the protrusions 11 is based on a cylindrical shape is about 1 ~ 3mm in diameter. The shape of the protrusion 11 may be cylindrical as shown in FIG. 2 or conical as shown in FIG.

In addition, by adjusting the particle size of the abrasive stone coated on the projection 11, a better quality acicular hair is obtained. That is, 200 to 300 mesh of abrasive stones in the polishing drum participating in the initial polishing work, 300 to 700 mesh in the polishing drum participating in the medium polishing work and 700 to 1000 mesh in the polishing drum participating in the later polishing work. When the abrasive stone is coated, the rough surface generated during the polishing process becomes very smooth, and the quality can be improved to the same level as the acicular hair by chemical treatment.

In addition, if necessary, each polishing drum can be reciprocated in a direction perpendicular to the direction of movement of the toothbrush. Not only the frictional heat generated during friction due to the reciprocating motion of the polishing drum is uniformly dispersed throughout the polishing drum, and the life of the polishing drum can be extended. Suitable distance of reciprocation is 5 ~ 10cm.

According to the present invention, a highly tapered acicular hair having a taper length of 5 mm or more without a chemical deposition process and a thickness of an end point within 0.02 mm is obtained, and thermal deformation occurring during a taper treatment process by a mechanical method is prevented. In addition, since no chemicals are used, the working environment is significantly improved and the cost of the product is lowered. In addition, the debris and dust separated during polishing are collected and recycled to a toothbrush rod, so it is environmentally friendly and can reduce the loss of resources.

An embodiment of the present invention is as follows.

The spacing between the projections 11 of the polishing drum used in the following embodiment is equal to 2 mm.

(Example 1)

The projections 11 having a height of 7.0, 6.6, 6.2, 5.8, 5.4, 5.0, 4.6, 4.2, 3.8, 3.4, 3.0, 2.6, 2.2, 1.8 and 1.5 mm, respectively, were formed, and the polishing drum rotating longitudinally and laterally. After fifteen were arranged in sequence from the left side, the bristles of the non-tapered general bristles were brushed from the left polishing drum. The polishing time for each polishing drum was 2.5 seconds, and the longitudinal rotational speed of the polishing drum was 300 rpm for 1, 2, 3 polishing drums, 485 rpm for 4, 5, 6 polishing drums, 7, 8, 9 polishing drums. 490rpm, 10, 11, 12 polishing drums were 495rpm, 13, 14, 15 polishing drums were 450rpm, and the lateral rotation speed was maintained at 1/3 of the longitudinal polishing rate. In order to increase the polishing efficiency, each polishing drum was reciprocated 5 cm in a direction perpendicular to the direction of toothbrush travel.

The projections 11 were coated with 200 mesh abrasive stones on the 1 to 5 abrasive drums from the left side, 350 mesh abrasives on the 6 to 8 abrasive drums, 550 mesh abrasives on the 9 to 11 abrasive drums, and 12 to The 15 abrasive drums were each coated with 850 mesh abrasive stones.

The tapered length of the obtained bristles was 6 mm, and 0.03 mm after the end point.

(Example 2)

Projections 11 with heights of 7.0, 6.7, 6.4, 6.1, 5.8, 5.5, 5.2, 4.9, 4.6, 4.3, 4.0, 3.7, 3.4, 3.1, 2.8, 2.5, 2.2, 1.9, 1.8, 1.6, 1.5 mm respectively Was formed, and 21 abrasive drums which rotated longitudinally and laterally were arranged sequentially from the left side, and then brushed bristles of the non-tapered toothbrushes were brushed from the left abrasive drum. The polishing time for each polishing drum was 2.5 seconds, and the longitudinal rotational speed of the polishing drums was 250 rpm for grinding drums 1, 2 and 3, and 470 rpm for grinding drums 4, 5 and 6, 470 rpm grinding drums. 475 rpm, 10, 11, 12, 13, 14, 15 abrasive drums at 480 rpm, 16, 17, 18 abrasive drums at 460 rpm, 19, 20, 21 abrasive drums at 450 rpm, and lateral rotation speed It was maintained to be 1/3 of the directional rotation speed. The reciprocating motion of the polishing drum was the same as in Example 1.

The projections 11 were coated with 200 mesh abrasive stones on the 1 to 5 abrasive drums from the left side, 350 mesh abrasives on the 6 to 8 abrasive drums, 550 mesh abrasives on the 9 to 11 abrasive drums, and 12 to 16 abrasive drums were coated with 850 mesh abrasive stones and 17-21 abrasive drums with 1000 mesh abrasive stones, respectively.

The tapered length of the obtained bristles was 7 mm, and the trailing edge point was 0.02 mm or less (0.01-0.02 mm).

(Example 3)

The height of the projection 11 is 7 mm for the polishing drums 1 to 4, the height of the projection 11 is 5 mm for the polishing drums 4 to 8, and the height of the projection 11 is 8 mm for the polishing drums 8 to 12. The 3mm, 13 to 15 polishing drums were each provided with a height of the projection 11 is 1.5mm, the rest was performed in the same manner as in Example 1.

The tapered length of the obtained bristles was 6 mm, and 0.02 mm after the end point.

(Comparative Example 1)

As in Example 1, the polishing was carried out with 15 polishing drums, but the height of the protrusion 11 was 5 mm. The polishing time of each polishing drum was 2.5 seconds and the polishing speed of the polishing drum and the coated abrasive stone mesh were the same as those of Example 1, and the resulting bristles had a taper length of 4 mm and a trailing point of 0.04 mm. Simulation deformation (curvature at the end) occurred due to frictional heat.

(Comparative Example 2)

It carried out similarly to Example 1, but increased the longitudinal rotational speed to 1,000 rpm, and the lateral rotation speed to 330 rpm. The bristles obtained had the same taper length and end point degree as the bristles obtained in Example 1, but thermal deformation occurred.

(Comparative Example 3)

The height of the projections 11 formed on each polishing drum is unified to 6 mm, and the polishing method is as follows in the first to fourth polishing drums from 6 to 6 mm on the first and fourth polishing drums, as shown in Example 3. The grinding work was performed by adjusting the position of the polishing drum so as to contact with the polishing drum up to 5mm, up to 3mm at the end of the simulation at 8 ~ 12 polishing drums, and up to 1.5mm at the end of the simulation at 13 ~ 15 polishing drums. Was carried out in the same manner as in Example 1.

The simulated taper length obtained was similar to that obtained in Example 3, but some thermal deformation was observed, and the thickness of the tip was 0.05 mm, resulting in poor polishing of the tip.

1 is a perspective view of a polishing drum used in the present invention,

2 is a partially enlarged view showing a state in which bristles are polished between the projections.

3 is a partially enlarged view of a conical protrusion.

* Explanation of symbols for the main parts of the drawings

10: polishing drum, 11: protrusion

20: axis of rotation, 30: rotor

P: bottom between protrusions

Claims (6)

In the method of tapering bristles with a polishing drum rotating longitudinally and laterally, a projection of 1.5 to 7.0 mm height is formed, and a plurality of polishing drums are connected in parallel, and the height of the projections formed on each polishing drum is sequentially A method of tapering bristles, wherein the polishing drums are arranged in decreasing order and are continuously polished by sequentially passing the toothbrushes in which the non-tapered general hairs have been implanted through each of the arranged polishing drums. The method of claim 1, wherein the longitudinal rotational speed of the polishing drum is 200 to 500rpm. The method of claim 2, wherein the longitudinal rotational speed of the polishing drum is 250 to 480rpm. The method of claim 1, wherein the polishing drum is disposed 15 to 30 taper processing method of the bristles. The method of claim 1, wherein the polishing drum is a tapered processing method of the bristles, characterized in that the reciprocating movement at a distance of 5 to 10cm in a direction perpendicular to the traveling direction of the toothbrush. The method of claim 1, wherein the position of each polishing drum is disposed so that the tip of the bristles to contact the bottom (P) between the projections (11).

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