WO2007000922A1 - Method and device for manufacturing brush and brush - Google Patents

Abstract

A method for manufacturing a brush, comprising a step for implanting bristles in the bristle implanting face of the brush, a step for pruning, at a prescribed position, the tip portion of the bristles after implanting the bristles, and a step for processing the bristles so that the bristles can be tapered starting at the pruned faces of the bristles in the direction of the implanted part thereof. The method is characterized in that the step for processing the bristles comprises a step for coarsely polishing the bristles starting at the pruned face to the implanted part by using at least two types of rotary polishing bodies with different surface shapes and a step for processing the tip area of the bristles in a tapered shape by stepwise polishing the bristles starting at the tip to the implanted part thereof.

Description

 Specification

 Brush manufacturing method, manufacturing apparatus, and brush

 Technical field

 [0001] The present invention provides a brush manufacturing method, a manufacturing apparatus, and a brush, which are excellent in brushing performance in a narrow region where the penetration property into a fine gap is high and can prevent damage to the cleaning surface. Related.

 This application claims priority based on Japanese Patent Application No. 2005-190251 filed on June 29, 2005 and Japanese Patent Application No. 2005-191559 filed on June 30, 2005, the contents of which are incorporated herein by reference. Incorporated into.

 Background art

 [0002] Brushes in which a large number of brushes are implanted, for example, toothbrushes for oral cleaning, have different brushing properties and load on the gums depending on the shape of the tip region of the brush. Various tip shapes have been proposed. For example, in Patent Document 1, at least a part of all the bristle (brush) is tapered, and the surface roughness Ra of the tip force of 30% to 80% is 0.5 to 1.5 m. A toothbrush is described.

 [0003] Patent Document 2 describes a brush tip grinding method in which the tip of the brush is sharpened by pressing the tip of the brush against a rotating wire brush and grinding. Furthermore, Patent Document 3 describes a method of sharpening both ends of a polyester fiber. Patent Document 1: Japanese Patent Laid-Open No. 10-57149

 Patent Document 2: Japanese Patent Laid-Open No. 10-14663

 Patent Document 3: Japanese Patent Publication No.57-48661

 Disclosure of the invention

 Problems to be solved by the invention

[0004] However, in the invention described in Patent Document 1, since the brush is tapered, the penetration into fine parts such as the teeth is high, but the surface roughness Ra is rough, so the gums are damaged. There were concerns. Since unevenness occurs on the brush surface, there is a concern that the stress at the time of brushing is concentrated at a specific point, and that the brush is bent or the durability is lowered. [0005] In addition, in the invention described in Patent Document 2, since the brush tip is sharpened by pulling the brush with a wire brush, the force near the brushed portion (planted portion, root) of the brush is also sharpened. It was impossible, and the taper shape of the brush had to be limited. Further, when the brush is shaved with such a rotating wire brush, there is a problem that the tip shape and the surface of the brush become very rough, and the durability of the brush is deteriorated.

 [0006] Furthermore, in the invention described in Patent Document 3, since the sharpening process is performed before planting the brush, the hair tip cannot be pruned after planting, and the cleaning surface cannot be made into a complicated shape. There was a problem. Further, in the disclosed manufacturing process, a brush assembly having a low yield requires careful handling, so that it takes a lot of time and cost to clean the chemical processing force. Furthermore, since the sharpening process at the tip of the brush is performed by using the suction of chemicals by capillary action, it is difficult to control the delicate taper shape at the tip of the brush. It was quite difficult to do.

 [0007] The present invention has been made in view of the above circumstances, and a brush manufacturing method and manufacturing that are easy to manufacture and low-cost without damaging the brushed portion where the penetrating ability of the brush tip into a narrow gap is high. An object is to provide an apparatus.

 Means for solving the problem

 [0008] The present invention includes a step of planting a brush on a brush planting surface of a brush, a step of pruning a tip portion of the brush after planting at a predetermined position, and a direction from the pruning surface of the brush toward the planting unit. A brush manufacturing method including a step of processing a brush to form a taper, wherein the step of processing the brush includes planting from the pruned surface using at least two types of rotating abrasives having different surface shapes. Manufacturing of a brush characterized in that it includes a step of roughly polishing up to the installation portion and a step of polishing stepwise from the tip of the brush to the planting portion to process the tip region of the brush into a taper shape. Regarding the method.

 [0009] The method for manufacturing the brush further includes a post-process for pruning the tip end portion of the brush that has undergone the step of processing the tip end region of the brush into a tapered shape, and further processing the tip region of the pruned brush into a tapered shape. Can be included.

According to the method for manufacturing the brush, the plurality of rotating abrasive bodies are arranged linearly adjacent to each other, and the pruned brush is sequentially brought into contact with the plurality of rotating abrasive bodies to obtain a brush. It is preferable to polish in a stepwise manner from the tip to the planting part.

 It is preferable that at least one of the polishing rotating bodies includes at least one of a metal alloy, ceramics, and fibers as a polishing material on the surface thereof.

 In the method for manufacturing the brush, it is preferable that the polishing is performed so that at least one inflection point is formed between the tip of the brush and the planting portion.

 The brush is preferably a toothbrush for oral cleaning.

[0010] The present invention also relates to a brush that is manufactured by the method for manufacturing a brush and that has a brush surface roughness Ra of less than 0.5 μm.

 The brush is preferably polished so that at least one inflection point is formed between the tip of the brush and the planting portion.

[0011] In addition, the present invention provides a planting unit for planting a brush on a brush planting surface, a pruning unit for pruning a tip portion of the brush after planting at a predetermined position, a pruning surface of the brush, and a planting A brush manufacturing apparatus having a polishing section that processes a taper between a mounting surface and the polishing section, wherein the polishing section includes at least two types of polishing bodies having different surface shapes. The bearing that supports the first rotating shaft rotates along the second rotating shaft while rotating along the rotating shaft of the brush, and smoothly tapers between the pruning surface and the planting surface of the brush. The present invention relates to a brush manufacturing apparatus.

[0012] It is preferable that at least one of the polishing rotators has a large number of polishing protrusions formed on the surface so as to protrude outwardly from the peripheral surface.

 The plurality of rotating abrasive bodies are arranged linearly adjacent to each other, and the pruned brushes are sequentially brought into contact with the plurality of rotating abrasive bodies to step between the pruning surface and the planting surface of the brush. It is preferable to polish the floor.

 At least one of the polishing rotators is preferably a ground surface having a particle size such that the surface roughness Ra of the brush is less than 0.5 m.

 The brush is preferably a toothbrush for oral cleaning.

[0013] The present invention also relates to a brush that is manufactured by the brush manufacturing apparatus and has a brush surface roughness Ra of less than 0.5 μm.

The invention's effect [0014] According to the method and apparatus for manufacturing a brush of the present invention, after the brush is implanted in the head portion of the brush, the brush is pruned into an arbitrary shape, and then the tip of the brush is sharpened and the taper applied. By performing the above, it is possible to add various types of nomination to the tip shape of the brush, and it is possible to design and manufacture a highly functional brush with a sharpened brush tip.

 [0015] When a brush tip is sharpened by chemical treatment before planting a brush as in the past, the shape of the tip of the tip depends on factors such as the treatment temperature, time, and the winding pressure of the band that bundles the brush bundle. Therefore, it was very difficult to control the formation of the tapered shape. In addition, the capillary action is used to suck up chemicals into the brush bundle and to apply a uniform taper shape to both ends of the brush bundle before flocking. It was difficult to control the taper shape. However, the brush manufacturing method and manufacturing apparatus of the present invention can freely control the taper shape of the brush, and the brush tip can be sharpened easily and quickly even for a brush having a short overall length. Possible

[0016] Further, since brush sharpening is performed after flocking, the brush having a sharp taper-shaped brush not only for flat wire flocking, but also for flocking without flat wire such as in-mold molding and heat fusion flocking Can be manufactured.

 [0017] In addition, when the tip of the hair is sharpened by chemical treatment before planting the brush as in the prior art, the yield is generally as low as 50%, and in the case of sharpening by chemical treatment, a capillary phenomenon is caused. Since the process is carried out using only the taper, the formation of the tapered shape and the sharpening speed are limited, and the process takes a lot of time. However, according to the method and apparatus for manufacturing a brush of the present invention, after brushing and pruning a brush, sharpening is performed by a polishing process, so that the productivity is remarkably improved and the yield is also improved.

[0018] Further, in the conventional general brush manufacturing method and manufacturing apparatus, the sharpened brush bundle is unstable and collapses, and the sharpened brush bundle is not automatically supplied to the hair transplanter. It was very difficult. However, when the sharpening process is performed after flocking as in the method and apparatus for manufacturing a brush according to the present invention, the automatic supply of the brush 13 is facilitated, and the tip of the brush, which has conventionally been impossible to prevent. Since there are no defective products due to unevenness, there is no need for rework (rework), and the number of man-hours for brush production can be greatly reduced. it can.

 [0019] In addition, in the case of planting a tapered sharpened brush in the conventional brush planting process, the production speed is sharpened, and compared with the case of planting a brush. The power that must be reduced. However, in the method and apparatus for manufacturing a brush according to the present invention, since the brushing process is performed by brushing a brush that has not been sharpened, high-speed hair transplantation is possible using general-purpose equipment that does not reduce the quality of the planting. .

 [0020] In addition, various types of brushes (color, brush diameter, etc.) can be easily implanted without degrading the quality of the brush. For this reason, a brush having a wider brush nourishment can be produced at a lower cost. In addition, since a dedicated hair transplanter is not required, it is possible to deal with changes in demand more flexibly and manufacture brushes at low cost.

 [0021] In addition, brushes made by conventional mechanical polishing have a brush surface roughened due to brush wear, resulting in many burrs. As a result, when used for a toothbrush, the brushed surface such as the oral cavity is damaged. There was a possibility. However, in the brush manufacturing method and manufacturing apparatus of the present invention, after the brush surface is ground by mechanical polishing, it is polished so that the brush surface has a sliding force in the finishing process. Thus, it is possible to provide a toothbrush that is easy to enter the gap and has high safety when used in a toothbrush.

 Brief Description of Drawings

FIG. 1 is a plan view showing an example of a brush (toothbrush) according to the present invention.

 FIG. 2 is an enlarged cutaway view of a flocked portion of the brush shown in FIG.

 FIG. 3 is an enlarged cross-sectional view of a brush.

 FIG. 4 is an explanatory view showing a brush manufacturing apparatus used in the brush manufacturing method of the present invention.

 FIG. 5 is an enlarged cross-sectional view showing a brush before polishing.

 FIG. 6 is an enlarged cross-sectional view showing a brush in the middle of polishing.

 FIG. 7 is an enlarged sectional view showing a brush in the middle of polishing.

 FIG. 8 is an enlarged cross-sectional view showing a brush in the middle of polishing.

 FIG. 9 is an enlarged cross-sectional view showing a brush when polishing is completed.

FIG. 10 is an enlarged sectional view showing a polishing variation of a brush according to the present invention. FIG. 11 is a plan view showing the shape of a brush bundle according to the present invention.

 Explanation of symbols

 [0023] 10 Toothbrush (Brush)

 13 Brush

 31, 32, 33, 34 Polishing drum (rotating abrasive)

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, a brush, a method for manufacturing the brush, and a manufacturing apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is an overall plan view showing a toothbrush that is an embodiment of the brush of the present invention manufactured by the manufacturing method and manufacturing apparatus of the brush of the present invention, and FIG. 2 is an enlarged cutaway view showing the flocked portion. It is. The toothbrush (brush) 10 includes a handle portion 11 and a head portion 12 extending from the handle portion 11 and formed integrally with the handle portion 11. The handle portion 11 is a portion for holding the toothbrush 10 and may be formed by giving a bulge so as to be easily held according to the shape of the hand or the like.

 [0025] The head portion 12 is a portion in which a large number of brushes 13 are implanted on one surface, and the boundary region between the head portion 12 and the handle portion 11 is such that the head portion 12 can be bent with respect to the handle portion 11. Alternatively, it may be formed of a flexible resin.

 [0026] One surface of the head portion 12 is a flocking surface 15, and a large number of flocking holes 16 are arranged. As shown in FIG. 2, each of the flock holes 16 has a hair bundle 17 in which a plurality of brushes 13 are bundled. The hair bundle 17 is folded in half from the center and pushed into the flock hole 16, and is fixed to the flock hole 16 at a two-fold portion by a flat plate-like metal plate called a flat wire 18. By such a flocking method, a large number of brushes 13 are planted on the flocking surface 15 of the head portion 12.

As shown in FIG. 3, the brush 13 of the toothbrush (brush) 10 of the present invention is formed by a method for manufacturing a brush of the present invention described later, as shown in FIG. Is tapered so as to taper toward the tip 13b of the brush 13. The brush 13 is preferably polished so that at least one inflection point is formed between the tip 13b of the brush 13 and the flocked portion (planted portion) 13a in the planting direction. Here, the inflection point means a point where the inclination of the tangent of the surface curve in the length direction of the brush 13 changes. The surface of the brush 13 Is formed such that the surface roughness Ra is less than 0.5 / zm.

[0028] Next, with respect to such a toothbrush (brush) manufacturing method and manufacturing apparatus, brush processing will be mainly described.

 In manufacturing the toothbrush (brush) 10, first, the handle portion 11 and the head portion 12 are integrally formed by injection molding or the like, and then the flocked hole 16 is formed on the flocked surface 15. After that, in the planting part (planting process) (not shown), the hair bundle 17 in which a plurality of brushes 13 are bundled into each of the flock holes 16 formed on the flocked surface 15 is folded in half from the center and pushed. Then, it is fixed to the flocking hole 16 with a flat wire 18 and the brush 13 is flocked to the head portion 12.

 [0029] Next, the toothbrushes (brushes) 10 before processing the brush 13 formed in this way are continuously fed one by one into the brush processing apparatus (brush processing step) 20 shown in FIG. The brush processing device (brush processing step) 20 includes a pruning unit (pruning step) 21, first to fourth polishing units (polishing step) 22 to 25, and a toothbrush (brush) 10 between these steps. However, it is composed of a conveyor (transportation process) 26 that is transported.

 [0030] In the pruning section (pruning step) 21, the tip of the brush 13 immediately after flocking is cut flat, for example, with a cutter or the like. As shown in FIG. 5, the tip of the brush 13 immediately after passing through such a pruning part (pruning step) 21 has a flat tip and a corner.

 [0031] The brush 13 whose tip has been trimmed in the pruning section (pruning step) 21 is held by the conveyor 26 and fed into the first polishing section 22. In the first polishing unit 22, the brush 13 is polished using a polishing drum (rotary polishing body) 31 in which polishing barrels are applied to the surface of a cylindrical drum, for example, in a stripe shape. The polishing drum 31 rotates (rotates) in the circumferential direction along the central axis 31a of the cylinder, and rotates the bearing 31b that supports the central axis 31a. Rotate (revolve) in the direction of 360 ° rotation. The brush 13 of the toothbrush (brush) 10 is brought into contact with the polishing drum 31 rotated and revolved in this manner, and the brush 13 is polished.

[0032] The polishing barrel of the polishing drum 31 in the first polishing section 22 has a particle size of # 2000 or less, preferably # 60 to # 800. Compared with this, the particle size is finer and the polishing efficiency is remarkably lowered. Further, if the particle size is coarser than this, the processed surface of the brush becomes rough, which is not preferable in terms of appearance and quality. The rotation speed is 200 to 2500 rpm for rotation and 10 to 500 rpm for revolution. Is desirable. More preferably, the rotation is 500 to 2000 rpm and the revolution is 20 to 250 rpm. If the speed is faster than this, defects such as hair opening and cracking of the hair tip will occur. In addition, if the speed is slower than this, the polishing efficiency is significantly reduced.

 [0033] The amount of contact between the polishing drum 31 and the brush 13 is preferably up to 80% of the total length of the brush 13 by force in the tip direction of the brush 13 and more preferably up to 70% of the total length. By setting the contact amount as described above, the deep force of the brush 13 can be tapered, and the toothbrush 10 having a flexible taper shape can be manufactured. On the other hand, if the brush 13 is brought into contact with the polishing drum 31 deeper than the above-described range, there is a risk that the brush 13 may be broken or broken.

 [0034] As shown in FIG. 6, in the first polishing part 22, the brush 13 is polished stepwise between the tip and the flocked part (planting part) in a range of 20 to 70% of the total length of the brush, Corners generated in the pruning section (pruning process) 21 are removed. Then, the tip portion is tapered. At this time, some burrs generated during polishing remain on the surface of the brush 13.

 The toothbrush 10 whose tip portion has been subjected to rough taper processing in the first polishing unit 22 is held by the comparator 26 and is put into the second polishing unit 23. In the second polishing section 23, the brush 13 is polished using a polishing drum (rotary polishing body) 32 in which a large number of polishing protrusions 32b, which are protrusion-like polishing bodies, are formed on the surface of a cylindrical drum 32a.

 The polishing drum 32 (rotary polishing body) rotates (rotates) in the circumferential direction along the central axis 32c of the cylinder, and rotates the bearing 32d that supports the central axis 32c, thereby rotating the polishing drum 32. Rotate (revolve) 32 in the direction in which center shaft 32c rotates 360 °. The brush 13 of the toothbrush (brush) 10 is brought into contact with the polishing drum 32 that has rotated and revolved in this manner, and the flocked portion (planted portion) of the brush 13 is polished.

[0037] The pitch between the polishing protrusions 32b of the polishing drum 32 formed with a large number of polishing protrusions 32b used in the second polishing part 23, which is performed after the brush 13 is subjected to rough taper processing of the tip part in the first polishing part 22 Is preferably 0.5 to: LO. Omm. More preferably, it is 1.0 to 6. Om m. If the pitch between the polishing protrusions 32b is narrower than this, it is difficult to manufacture the polishing drum 32, which increases costs. On the other hand, if the pitch is too wide, it takes time to process the contact efficiency between the brush 13 and the polishing protrusion 32b. [0038] Further, it is desirable that the abrasive cannonball formed on the surface of the polishing protrusion 32b at this time has a particle size of # 2000 or less, preferably about # 60 to # 800. If the particle size is finer than this, the polishing efficiency is significantly reduced. Further, if the particle size is coarser than this, the processing surface of the brush 13 becomes rough, which is not preferable in terms of appearance and quality.

 [0039] The length of the polishing protrusion 32b of the polishing drum 32 is 2. Omm to 10. Omm, more preferably 3.0 mn! ~ 8. Omm is desirable. As a result, the brush 13 can be further polished to a deeper portion.

 [0040] The thickness of the polishing protrusion 32b is preferably 0.2 mm to 5. Omm, and more preferably 0.5 mm to 3.0 mm. When the polishing protrusion 32b is thicker than this, the polishing protrusion 32b of the polishing drum 32 does not uniformly hit the entire brush 13, and the taper state is uneven. Also, if the polishing protrusion 32b is narrower than this, the strength of the polishing protrusion 32b itself becomes weak, the durability during production deteriorates, and the manufacturing cost increases.

 [0041] The shape of the polishing protrusion 32b may be any of a cylinder, a polygonal column, a cone, a polygonal pyramid, a truncated cone, and a polygonal truncated cone. The rotational speed of the polishing drum 32 provided with a large number of such polishing protrusions 32b is preferably in the range of a rotational force of S300 rpm to 2000 rpm and a revolution of 10 rpm to 300 rpm. More preferably, the rotation force is 00rpm ~ 1500rpm, the revolution is 20rpm ~ 150rpm force S!

 [0042] When the rotation and revolution speeds of the polishing drum 32 are faster than the speed range described above, the stress on the brush 13 is too large, and the hairs open or cracks occur at the tip of the brush 13. Further, if the speed is slower than this, the polishing efficiency is remarkably lowered. The rotation and revolution speeds of the polishing drum 32 change with the amount of contact with the brush 13, and if the amount of contact is reduced, rotational polishing at a higher speed becomes possible. The contact amount between the brush 13 and the polishing protrusion 32b may be 80%, more preferably 70%, of the total length of the brush 13 from the tip of the brush 13 toward the root. If the polishing protrusions 32b are brought into contact with the deep part of the brush 13 beyond this, the stress on the brush 13 is too great, causing the hair to open.

 [0043] As shown in FIG. 7, in the second polishing portion 23, the brush 13 is polished stepwise between the tip and the flocked portion (planted portion) in a range of 35 to 80% of the total length of the brush, Polished so that the thickness of the brush 13 is reduced from the planted part (planted part) to the tip. Even at this stage, some burrs generated at the time of polishing remain on the surface of the tip of the brush 13.

[0044] In the second polishing portion 23, rough! ヽ taper processing was performed between the flocked portion (planted portion) and the tip. The toothbrush 10 is held by the conveyor 26 and is put into the third polishing unit 24. The third polishing unit 24 uses a polishing drum (rotary polishing body) 33 in which a large number of polishing protrusions 33b, which are protrusion-like polishing bodies, are formed intermittently on a surface of a cylindrical drum 33a with a predetermined width. Brush 13 is polished.

 The polishing drum (rotary polishing body) 33 rotates (rotates) in the circumferential direction along the central axis 33c of the cylinder, and rotates the bearing 33d that supports the central axis 33c, thereby rotating the polishing drum. Rotate 33 (revolve) in the direction that the central shaft 33c rotates 360 °. The brush 13 of the toothbrush (brush) 10 is brought into contact with the thus-rotated and revolved polishing drum 33, and the tip of the brush 13 is polished.

 [0046] The pitch between the polishing protrusions 33b that are intermittently formed with a certain width on the polishing drum 33 of the third polishing section 24 is preferably 0.5 to LO.Omm. More preferably, it is 1.0 to 6. Om m. If the pitch is narrower than this, it is difficult to manufacture the polishing protrusions 33b, which increases costs. On the other hand, if the pitch is too wide, the contact efficiency between the polishing projections 33b and the brush 13 is poor, and it takes time to taper the brush 13. Further, it is desirable that the abrasive cannonball formed on the surface of the polishing projection 33b has a particle size force of 2,000 or less, preferably about # 100 to # 800. Compared to this, the particle size is finer and the polishing efficiency is remarkably lowered. If the particle size is coarser than this, the processing surface of the brush 13 becomes rough, which is not preferable in terms of appearance and quality.

 [0047] The length of the polishing protrusion 33b of the polishing drum 33 is 1.0 mm to 8. Omm, more preferably 2.0 mn! ~ 6. Omm is desirable. By doing so, it is possible to carry out polishing calorie from the tip of the brush 13. The thickness of the polishing protrusion 33b is 0.5mn! ~ 4. Omm, more preferably 0.7mn! ~ 2.5mm is desirable. As a result, if the polishing protrusion 33b is thick, the polishing protrusion 33b does not hit the entire brush 13, and the taper state of the polishing protrusion 33b becomes uneven. Further, if the polishing protrusion 33b is thinner than this, the strength of the polishing protrusion 33b itself is weak, and the durability is deteriorated during production.

[0048] The shape of the polishing protrusion 33b may be any of a cylinder, a polygonal column, a cone, a polygonal pyramid, a truncated cone, and a polygonal truncated cone. The rotation speed of the polishing drum 33 having a large number of such polishing protrusions 33b is preferably 500 rpm to 2500 rpm for rotation and 10 rpm to 300 rpm for revolution. More preferably, the rotation is lOOOrpn! ~ 2000rpm, Revolution force S20rpm ~ 150rpm power! [0049] When the speed is higher than the speed range described above, the stress on the brush 13 is too great, and the brush 13 opens or the tip of the brush 13 cracks. In addition, if the speed is slower than this, the polishing efficiency is significantly reduced. This rotational speed changes with the amount of contact of the brush 13, and if the amount of contact is reduced, rotational polishing at a higher speed becomes possible. The contact amount between the brush 13 and the polishing protrusion 33b may be 60% of the total length from the tip of the brush 13, more preferably 50%. If the polishing protrusion 33b is brought into contact with a deeper portion than this, the stress on the brush 13 is too great and causes the hair to open. In the third polishing unit 24, it is possible to sharpen the tip of the brush 13 by gradually reducing the contact amount between the brush 13 and the polishing protrusion 33b.

 [0050] As shown in FIG. 8, in the third polishing unit 24, the brush 13 is polished stepwise between the tip and the planted portion (planted portion) in a range of 5 to 60% of the total length of the brush, Polished so that the thickness of the brush 13 is reduced from the planted part (planted part) to the tip. Even at this stage, some burrs generated during polishing remain on the surface of the tip of the brush 13.

 [0051] The toothbrush 10 having a rough taper applied to the tip region of the brush 13 by the third polishing unit 24 is held by the conveyor 26 and is put into the fourth polishing unit 25. The fourth polishing unit 25 uses a polishing drum (rotary polishing body) 34 composed of a rotating drum with fibers on the surface, a rotating drum with fibers implanted, or a mirror drum, and the like, and remains on the surface of the brush 13. Remove the glue and finish the surface of the brush 13 smoothly. The polishing drum 34 (rotary polishing body) rotates (rotates) in the circumferential direction along the center axis 34a of the cylinder, and rotates the bearing 34b that supports the central axis 34a to rotate the polishing drum 34. Is rotated (revolved) in the direction in which the central axis 34a rotates 360 °. The brush 13 of the toothbrush (brush) 10 is brought into contact with the polishing drum 34 rotated and revolved in this manner, and the brush 13 is finished and polished.

 [0052] When the surface of the polishing drum 34 is a fiber, the fiber is preferably a natural fiber such as cotton, hemp, silk, or wool, or a chemical fiber such as polyurethane, polyamide, polyester, polyolefin, polypropylene, or acrylic. . When the surface of the polishing drum 34 is a mirror surface, at least the surface can be made of a metal alloy, for example, stainless steel, titanium, aluminum, copper, or ceramics.

[0053] The rotational speed of the finishing polishing drum 34 is preferably 500 to 3000 rpm for rotation and 10 to 500 rpm for revolution. More preferably, the rotation is 1000 to 2500 rpm, the revolution is 2 0 to 250 rpm is desirable. If the speed is higher than this, defects such as the opening of the brush 13 and the melting of the hair will occur. Further, if the speed is slower than this, the burr removal efficiency is remarkably lowered. The contact amount between the surface of the polishing drum 34 and the brush 13 is preferably such that 50 to 80% of the total length of the brush contacts the surface of the polishing drum 34 from the tip of the brush to the root. As a result, it is possible to remove the burrs and roughness up to the surface of the deep force of the brush 13 and obtain a good brush shape.

 As shown in FIG. 9, in the fourth polishing portion 25, the burr on the surface of the brush 13 is removed, and the thickness of the brush 13 is smoothly reduced from the deep portion of the brush 13 toward the tip. Finished and polished.

 After finishing and polishing in this way, the tip of the brush can be further pruned. Further, as a post-process, the tip region of the brush can be processed into a taper shape.

[0055] As described above, according to the brush manufacturing method and manufacturing apparatus described in detail, the burrs on the surface of the brush 13 are removed, and the thickness of the brush 13 can be smoothly reduced from the deep part of the brush 13 toward the tip. At least one inflection point is formed from the tip of the brush 13 toward the planting portion (root). Further, the surface roughness Ra of the brush 13 is formed to be less than 0.5 / zm, thereby preventing the surface to be cleaned from being damaged. After the brush 13 is implanted in the head portion 12 of the brush 10, the brush 13 is pruned into an arbitrary shape, and then the tip of the brush 13 is sharpened and the taper processed. It is possible to design and manufacture highly functional brushes with sharpened tips of the brush 13, which can be added with various types of nomination.

[0056] When the tip of a brush is sharpened by chemical treatment prior to flocking as in the past, the tipper shape of the tip depends on factors such as the processing temperature, time, and the winding pressure of the band that bundles the brush bundle. Therefore, it was very difficult to control the formation of the tapered shape. In addition, the capillary action is used to suck up chemicals into the brush bundle and to apply a uniform taper shape to both ends of the brush bundle before flocking. It was difficult to control the taper shape. However, it is possible to freely control the taper shape of the brush 13 by the above-described brush manufacturing method and manufacturing apparatus, and it is possible to sharpen the tip of the brush 13 easily and quickly even for a brush having a short overall length. Possible and Become.

 [0057] In addition, since the brush 13 is sharpened after flocking, it is not limited to flat flocking, but is also suitable for flocking without flat wire such as in-mold molding and heat fusion flocking. Can be produced.

 [0058] In addition, when the tip of the hair is sharpened by chemical treatment before planting the brush as in the conventional case, the yield is generally as low as 50%, and in the case of sharpening by chemical treatment, a capillary phenomenon is caused. Since the process is carried out using only the taper, the formation of the tapered shape and the sharpening speed are limited, and the process takes a lot of time. However, according to the method and apparatus for manufacturing a brush of the present invention, the brush 13 is planted and pruned, and then sharpened by a polishing process, so that the productivity is remarkably improved and the yield is also improved.

 [0059] Furthermore, in the conventional general brush manufacturing method and manufacturing apparatus, the sharpened brush bundle is unstable and collapses, and the sharpened brush bundle is not automatically supplied to the hair transplanter. It was very difficult. However, when the sharpening process is performed after flocking as in the method and apparatus for manufacturing a brush according to the present invention, the automatic supply of the brush 13 is facilitated, and the tip of the brush, which has conventionally been impossible to prevent. Since there are no defective products due to irregularities, remanufacturing (rework) work is not required, and the number of man-hours for brush production can be greatly reduced.

 [0060] In addition, in the case of planting a brush with a sharpened taper shape in the conventional brush planting process, the production speed is sharpened, compared with the case of planting the brush. It must be reduced. However, in the method and apparatus for manufacturing a brush according to the present invention, since the brushing process uses a brush that is not sharpened, high-speed hair transplantation can be performed using general-purpose equipment without reducing the planting quality. Become.

 [0061] In addition, many types of brushes (color 'brush diameter, etc.) can be easily implanted without degrading the quality of the brush. For this reason, a brush having a wider brush nourishment can be manufactured at a lower cost. In addition, since a dedicated hair transplanter is not required, it is possible to deal with changes in demand more flexibly and manufacture brushes at low cost.

[0062] In addition, brushes produced by conventional mechanical polishing have a brush surface roughened due to brush wear, resulting in many burrs. As a result, when used as a toothbrush, the brushed surface such as the oral cavity is damaged. There was a possibility. However, in the method and apparatus for manufacturing a brush according to the present invention, the surface of the brush is ground smoothly by mechanical polishing, and then the surface is smoothly polished in the finishing process. In addition, when used in a toothbrush, a highly safe toothbrush can be provided.

 [0063] It should be noted that the brush 13 used in the present invention may be made of any material, but polyamide polyamide resin (6

 Preferred examples include brushes made of 10 nylon, 6-12 nylon, etc.) or polyester resin (PET, PBT, PTT, etc.).

 The shape of the brush polished by the brush manufacturing method and manufacturing apparatus of the present invention is such that the thickness of the brush smoothly decreases toward the tip of the deep force of the brush as shown in the above-described embodiment. In addition to polishing as described above, for example, brushes having various cross-sectional shapes as shown in FIGS. The polishing shape of each brush can be realized by controlling the shape, rotation speed, and rotation direction of the polishing drum. By changing the polishing shape of the brush in accordance with the shape of the surface to be cleaned, a brush that can exhibit the optimum cleaning ability according to the object to be cleaned can be manufactured.

 [0065] Also, for example, when a toothbrush is manufactured using the manufacturing method and manufacturing apparatus of the brush of the present invention, the entire shape of the tip of the brush bundle planted in the head portion is flat as shown in the above-described embodiment. In addition to the above, for example, as shown in FIGS. This makes it possible to give each toothbrush a unique cleaning ability.

 Example

 [0066] Hereinafter, as an example, the effect of a toothbrush manufactured by the method and apparatus for manufacturing a brush of the present invention was verified. Note that the present invention is not limited to such a configuration.

 [0067] (Example 1)

 Planting process:

 A hair bundle with a hair diameter of 8. Omil (0.203 mm) and a material of nylon was planted on the flocked surface.

 Pruning process:

Next, the brush was trimmed flat (planar cut) so that the brush length was 12. Omm. Polishing:

 1st process

 The brush was polished by rotating a helical drum with abrasive grain size # 400 at lOOOOrpm and revolving at lOOrpm. At this time, the contact amount between the drum and the brush was adjusted to 8. Omm, 5. Omm, and 3. Omm from the tip of the brush toward the root.

 Second step

 The brush was polished by rotating a projecting rotary drum having a polishing projection particle size of # 400 and a polishing projection having a polishing projection pitch of 0.5 mm on the surface at 1500 rpm and revolving at 30 rpm. At this time, the amount of contact force between the drum and the brush was adjusted to 7. Omm, 6. Omm, and 5. Omm from the tip of the brush toward the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 7. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 0.4 m, a hair diameter of 0.1 mm in the length direction from the tip is 30 μm, and the tip force is also 3 mm in the length direction. The taper had a diameter of 150 μm and a tip with a hair diameter of 170 m at a part of 5 mm in the length direction.

(Example 2)

Planting process:

 A hair bundle having a hair diameter of 8. Omil (0.203 mm) and a material of polybutylene terephthalate (PBT) was planted on the planted surface.

Pruning process: Next, the brush was trimmed flat (planar cut) so that the brush length was 12. Omm. Polishing:

 1st process

 The brush was polished by rotating a spiral drum with an abrasive grain size of # 400 at 800 rpm and revolving at lOO rpm. At this time, the contact amount between the drum and the brush was adjusted to 7. Omm and 5. Omm from the brush tip to the root.

 Second step

 The brush was polished by rotating a protruding rotating drum with polishing protrusions on the surface having an abrasive grain size of # 400 and a pitch between polishing protrusions of 0.5 mm at lOOO rpm and revolving at 30 rpm. At this time, the amount of contact force between the drum and the brush was adjusted to 7. Omm, 6. Omm, and 5. Omm from the tip of the brush toward the root.

 3rd process

 The brush was polished by rotating a projection-like rotating drum having a polishing projection particle size of # 800 and a polishing projection having a polishing projection pitch of 0.2 mm on the surface at 1800 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 6. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 0.3 m, a hair diameter of 0.1 mm in the length direction from the tip is 60 μm, and the tip force is also 3 mm in the length direction. The diameter was 170 μm, and the taper with a tip diameter of 5 mm in the length direction and a hair diameter of 190 m was formed.

 (Example 3)

Planting process:

A hair bundle having a hair diameter of 8. Omil (0.203 mm) and a material of polytrimethylene terephthalate (PTT) was implanted on the flocked surface. Pruning process:

 Next, the brush was trimmed flat (planar cut) so that the brush length was 12. Omm. Polishing:

 1st process

 The brush was polished by rotating a helical drum with abrasive grain size # 400 at lOOOOrpm and revolving at lOOrpm. At this time, the contact amount between the drum and the brush was adjusted to 8. Omm, 5. Omm, and 3. Omm from the tip of the brush toward the root.

 Second step

 The brush was polished by rotating a projecting rotary drum having a polishing projection particle size of # 400 and a polishing projection having a polishing projection pitch of 0.5 mm on the surface at 500 rpm and revolving at 30 rpm. At this time, the amount of contact force between the drum and the brush was adjusted to 7. Omm, 6. Omm, and 5. Omm from the tip of the brush toward the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 7. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 0.3 m, a hair diameter of 0.1 mm in the length direction from the tip is 30 μm, and the tip force is also 3 mm in the length direction. The taper had a diameter of 150 μm and a tip with a hair diameter of 180 m at the 5 mm length in the length direction.

 (Example 4)

Planting process:

Yamashige force 8. Omil (0.23mm), eyelash force 7. Omil (0.178mm), real talent Kana Iron hair bundles were planted on the flocked surface.

Pruning process:

 Next, the brush was cut into ridges so that the peak brush length was 11. Omm and the valley brush length was 8. Omm.

Polishing:

 1st process

 The brush was polished by rotating a helical drum with abrasive grain size # 400 at lOOOrpm and revolving at 120rpm. At this time, the contact amount between the drum and the brush was adjusted to 7. Omm and 4. Omm from the brush tip to the root.

 Second step

 The brush was polished by rotating a protruding rotating drum with polishing protrusions on the surface having an abrasive grain size of # 400 and a pitch between polishing protrusions of 0.5 mm at lOOO rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted to be 6. Omm and 5. Omm from the brush tip to the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 6. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 0.4 m, a hair diameter of 0.1 mm in the length direction from the tip is 30 μm, and the tip force is also 3 mm in the length direction. The taper had a diameter of 150 μm and a tip with a hair diameter of 170 m at a part of 5 mm in the length direction.

(Example 5) Planting process:

 A hair bundle of 8. Omil (0.203 mm) in diameter and made of nylon was planted on the flocked surface. Pruning process:

 Next, the brush was cut into a bundle of one end and one back of the convex convex end so that the brush length was 10.5 mm and 8. Omm.

Polishing:

 1st process

 The brush was polished by rotating a helical drum with abrasive grain size # 400 at lOOOrpm and revolving at 120rpm. At this time, the contact amount between the drum and the brush was adjusted to 7. Omm and 5. Omm from the brush tip to the root.

 Second step

 The brush was polished by rotating a protruding rotating drum with polishing protrusions on the surface having an abrasive grain size of # 400 and a pitch between polishing protrusions of 0.5 mm at lOOO rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted to be 6. Omm and 5. Omm from the brush tip to the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 6. Omm from the tip of the brush toward the root.

The resulting brush has a surface roughness (Ra) of 0.4 m, a hair diameter of 0.1 mm in the length direction from the tip is 30 μm, and the tip force is also 3 mm in the length direction. The diameter is 150 μm, and the tip force is 5 mm in the length direction. (Example 6)

Planting process:

 Yamawage hair force 8. Omil (0.203 mm), eyelash force 7. Omil (0.178 mm), a hair bundle of real-life Kanairon was planted on the flocked surface.

Pruning process:

 Next, the brush was cut into ridges so that the peak brush length was 11. Omm and the valley brush length was 8. Omm.

Polishing:

 1st process

 The brush was polished by rotating a helical drum with abrasive grain size # 400 at lOOOrpm and revolving at 120rpm. At this time, the contact amount between the drum and the brush was adjusted to 7. Omm and 4. Omm from the brush tip to the root.

 Second step

 The brush was polished by rotating a projecting rotary drum having a polishing projection particle size of # 400 and a polishing projection having a polishing projection pitch of 0.5 mm on the surface at 800 rpm and revolving at 30 rpm. At this time, the amount of contact force between the drum and the brush was adjusted to be 6. Omm, 5. Omm from the tip of the brush toward the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the mirror drum at 1500 rpm and revolving at lOO rpm. At this time, the amount of contact force between the drum and the brush was adjusted to be 6. Omm from the brush tip to the root.

The resulting brush has a surface roughness (Ra) of 0.2 m, a hair diameter of 0.1 mm in the length direction from the tip is 30 μm, and the tip force is also 3 mm in the length direction. The diameter is 150 μm As a result, the tip force had a taper with a hair diameter of 170 m at a part of 5 mm in the length direction.

 (Example 7)

Planting process:

 A hair bundle having a hair diameter of 6. Omil (0.152 mm) and a material of nylon was implanted on the flocked surface.

Pruning process:

 Next, the brush was trimmed flat (planar cut) so that the brush length was 11. Omm. Polishing:

 1st process

 The brush was polished by rotating a spiral drum with an abrasive grain size of # 400 at 1500 rpm and revolving at 120 rpm. At this time, the contact amount between the drum and the brush was adjusted to 7. Omm and 4. Omm from the brush tip to the root.

 Second step

 The brush was polished by rotating a projecting rotary drum having a polishing projection particle size of # 400 and a polishing projection having a polishing projection pitch of 0.5 mm on the surface at 1500 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted to be 6. Omm and 5. Omm from the brush tip to the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 6. Omm from the tip of the brush toward the root.

The resulting brush has a surface roughness (Ra) of 0.4 m, a hair diameter of 0.1 mm in the length direction from the tip is 20 μm, and the tip force is also 3 mm in the length direction. The diameter becomes 120 μm As a result, a taper with a hair diameter of 140 m at a 5 mm portion in the length direction was also formed.

 (Example 8)

Planting process:

 A hair bundle having a bristle diameter of 10. Omil (0.254 mm) and a material of nylon was implanted on the flocked surface. Pruning process:

 Next, the brush was trimmed flat (planar cut) so that the brush length was 12. Omm. Polishing:

 1st process

 The brush was polished by rotating a spiral drum with an abrasive grain size of # 400 at 1200 rpm and revolving at 120 rpm. At this time, the contact amount between the drum and the brush was adjusted to 8. Omm, 5. Omm, and 3. Omm from the tip of the brush toward the root.

 Second step

 The brush was polished by rotating a protruding rotating drum with polishing protrusions on the surface having an abrasive grain size of # 400 and a pitch between polishing protrusions of 0.5 mm at lOOO rpm and revolving at 30 rpm. At this time, the amount of contact force between the drum and the brush was adjusted to 7. Omm, 6. Omm, and 5. Omm from the tip of the brush toward the root.

 3rd process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions having a polishing particle size of # 800 and a polishing protrusion having a pitch between polishing protrusions of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 4th process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 7. Omm from the tip of the brush toward the root.

The resulting brush has a surface roughness (Ra) of 0.4 m, a hair diameter of 0.1 mm in the length direction from the tip is 50 μm, and the tip force is also 3 mm in the length direction. The diameter is 180 μm As a result, a taper with a hair diameter of 210 m at a 5 mm portion in the length direction was also formed.

 [0075] (Comparative Example 1)

 A hair bundle with a hair diameter of 8. Omil (0.203 mm) and a material of nylon was planted on the flocked surface. Next, the brush was cut flat (planar cut) so that the brush length was 12. Omm.

 Polishing:

 1st process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions on the surface having an abrasive grain size of # 400 and a pitch between polishing protrusions of 0.5 mm at lOOO rpm and revolving at 30 rpm. At this time, the amount of contact force between the drum and the brush was adjusted to be 8. Omm, 7. Omm, 6. Omm, 5. Omm from the tip of the brush toward the root.

 Second step

 The brush was polished by rotating a protruding rotating drum having polishing protrusions with a polishing protrusion particle size of # 400 and a polishing protrusion pitch of 0.2 mm on the surface at 2000 rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush was adjusted so that 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the tip of the brush toward the root.

 3rd process

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 7. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 0.4 m, a hair diameter of 0.1 mm in the length direction from the tip is 70 μm, and the tip force is also 3 mm in the length direction. The diameter was 180 μm, and the taper with a tip diameter of 5 mm in the length direction was 195 m.

 [0076] (Comparative Example 2)

 A hair bundle with a hair diameter of 8. Omil (0.203 mm) and a material of nylon was planted on the flocked surface. Next, the brush was cut flat (planar cut) so that the brush length was 12. Omm.

Polishing: 1st process

 The brush was polished by rotating a protruding rotating drum with polishing protrusions on the surface having an abrasive grain size of # 400 and a pitch between polishing protrusions of 0.5 mm at lOOO rpm and revolving at 30 rpm. At this time, the contact amount force between the drum and the brush is 8. Omm, 7. Omm, 6. Omm, 5. Omm, 4. Omm, 3. Omm, 2. Omm, 1. Omm from the brush tip to the root. Adjusted.

 The resulting brush has a surface roughness (Ra) of 2.0 m, a hair diameter of 0.1 mm in the length direction from the tip is 100 μm, and the tip force is also 3 mm in the length direction. The taper had a diameter of 180 μm and a tip diameter of 5 mm in the length direction with a hair diameter of 195 m.

[0077] (Comparative Example 3)

 The hair diameter was 8. OmiKO. 203mm), and a hair bundle made of nylon was planted on the flocked surface. Next, the brush was cut flat (planar cut) so that the brush length was 12. Omm.

 Polishing:

 1st process

 The brush was polished by rotating a helical drum with abrasive grain size # 400 at lOOOOrpm and revolving at lOOrpm. At this time, the contact amount between the drum and the brush was adjusted to 8. Omm, 5. Omm, 3. Omm, 1. Omm from the tip of the brush toward the root.

 Second step

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 7. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 0.8 m, a hair diameter of 0.1 mm in the length direction from the tip is 100 μm, and the tip force is also 3 mm in the length direction. The taper had a diameter of 160 μm and a tip force of 5 mm in the length direction with a hair diameter of 180 m.

[0078] (Comparative Example 4)

The hair diameter was 8. OmiKO. 203mm), and a hair bundle made of nylon was planted on the flocked surface. Then The brush was trimmed flat (planar cut) so that the brush length was 12. Omm.

 Polishing:

 1st process

 A wire brush was provided on the outer periphery of the drum, and the brush was ground by rotating the drum at 2000 rpm and revolving at 10 Orpm. At this time, the contact amount force between the drum and the brush was adjusted so as to be 8. Omm, 6. Omm, and 4. Omm from the brush tip to the root.

 Second step

 The brush was polished by rotating the fiber drum at 1500 rpm and revolving at lOO rpm. At this time, the contact amount force between the drum and the brush was adjusted to 7. Omm from the tip of the brush toward the root.

 The resulting brush has a surface roughness (Ra) of 1.5 m, a hair diameter of 0.1 mm in the length direction from the tip is 60 μm, and the tip force is also 3 mm in the length direction. The diameter was 180 μm, and the taper with a tip diameter of 5 mm in the length direction was 195 m.

 [0079] Evaluation of the feeling of use of the toothbrushes formed in Examples 1, 2, 4, 6, 7 and Comparative Examples 1 to 4 (interdental penetration, comfort on gums, overall evaluation) is as follows. The evaluation was made in four stages according to the criteria shown, and the results are shown in Table 1.

[0080], Interdental penetration

 Interdental penetration was evaluated by usability and usability evaluation.

 A: Very good penetration.

 ○: Good penetration.

 Δ: No problem in practical use.

 X: Slightly inferior in penetration.

In Table 1, below the evaluation result of the interdental penetration, the hair diameter at a portion of 0.1 mm in the length direction from the tip is shown. In other words, the value of the bristle diameter of the portion 0.1 mm in the length direction from the tip, the better the interdental penetration. However, for example, as shown in Examples 1 and 4, even if the hair diameter of the 0.1 mm portion from the tip is the same, due to the difference in hair cutting shape, the one with the mountain cut is more than the one with the flat cut. , Excellent interdental penetration [0081] · Touching the gums

 The gingival contact feeling was evaluated by usability and usability evaluation.

A: Very comfortable to hit.

 ◯: It is comfortable to hit.

 Δ: No problem in practical use.

 X: Slightly inferior.

[0082] · Comprehensive evaluation

 About comprehensive evaluation, it evaluated by usability and usability evaluation.

 A: Overall, very good as a toothbrush.

 ◯: Overall good as a toothbrush.

 Δ: Overall, there is no practical problem as a toothbrush.

 X: Slightly inferior as a toothbrush overall.

[0083] [Table 1]

表 1に示す結果によれば、いずれの実施例で製造した歯ブラシにおいても、歯肉 への当たり心地および総合評価に優れたものであった。また、実施例 1、 4、 6および 7で製造した歯ブラシについては、歯間進入性にも優れたものであった。これに対し 、比較例 1〜4で製造した歯ブラシは、歯間進入性および総合評価に劣るものであつ た。さらに、比較例 1, 2および 4では、歯肉への当たり心地についても劣るものであつ た。

According to the results shown in Table 1, the toothbrushes produced in any of the examples were excellent in the gingival contact feeling and the overall evaluation. Further, the toothbrushes produced in Examples 1, 4, 6 and 7 were excellent in interdental penetration. On the other hand The toothbrushes produced in Comparative Examples 1 to 4 were inferior in interdental penetration and comprehensive evaluation. Furthermore, Comparative Examples 1, 2 and 4 were also inferior in the gingival comfort.

Industrial applicability

 According to the present invention, after the brush is planted on the brush head, the brush is pruned into an arbitrary shape, and then the tip of the brush is sharpened and tapered to create a variety of tip shapes. It is possible to design and manufacture a highly functional brush with a sharp brush tip that can be added with a norelation.

 Further, the taper shape of the brush can be freely controlled, and the brush tip can be sharpened easily and quickly even for a brush having a short overall length.

 In addition, since brush sharpening is performed after flocking, not only flat flocking, but also in-mold molding, even for flocking without flat lines such as heat fusion flocking, it is possible to manufacture brushes with sharp tapered brushes. It becomes possible.

 In addition, since the brush is planted and pruned, it is sharpened by the polishing process, so the productivity is remarkably improved and the yield is also improved.

 In addition, by performing sharpening after flocking, automatic supply of brushes is facilitated, and defective products due to uneven brush tips do not occur, so there is no need for regeneration (rework) work and man-hours during brush production Can be greatly suppressed.

 Moreover, since the flocking process is the same as the normal flocking process, high-speed flocking is possible using general-purpose equipment without degrading the flocking quality.

 In addition, many types of brushes (color, brush diameter, etc.) can be easily implanted without degrading the brush quality. For this reason, a brush having a wider brush nourishment can be manufactured at a lower cost. In addition, since a dedicated hair transplanter is not required, it is possible to deal with changes in demand more flexibly and manufacture brushes at low cost.

 Furthermore, after the brush surface is ground by mechanical polishing, the brush surface is smoothly finished in the final polishing process. As a result, a toothbrush that easily enters a gap and is highly safe when used in a toothbrush is provided. be able to.

Claims

The scope of the claims  [1] A step of planting a brush on a brush planting surface, a step of pruning the tip of the brush after planting at a predetermined position, and a pruning surface force of the brush forming a taper in the direction of the planting portion A method of manufacturing a brush, comprising a step of processing a brush,  The process of processing the brush has the same surface shape! Using the at least two different types of rotating polishing bodies, the step of rough polishing from the pruned surface to the planted part and the step from the tip of the brush to the planted part are ground stepwise to make the brush A method of manufacturing a brush, comprising the step of processing the tip region into a tapered shape. [2] The method further comprises a post-process of pruning the tip portion of the brush that has undergone the step of processing the tip region of the brush into a tapered shape, and further processing the tip region of the pruned brush into a tapered shape. A method for producing the brush according to 1. [3] The plurality of rotating abrasive bodies are arranged linearly adjacent to each other, and the pruned brushes are sequentially brought into contact with the plurality of rotating abrasive bodies so that the space between the tip end of the brush and the planting portion is reached. 3. The method of manufacturing a brush according to claim 1, wherein the polishing is performed stepwise. [4] At least one of the polishing rotators includes at least one of a metal alloy, ceramics, and fiber as a polishing material on its surface as an abrasive. The manufacturing method of the brush according to item 1. [5] The tip force of the brush is polished so that at least one inflection point is formed up to the planting portion. The manufacturing method of the brush as described.  6. The method for manufacturing a brush according to any one of claims 1 to 5, wherein the brush is a toothbrush for oral cleaning. [7] A brush produced by the method for producing a brush according to any one of claims 1 and 6, wherein the brush has a surface roughness Ra of less than 0.5 μm. [8] The brush according to [7], wherein the brush is polished so that at least one inflection point is formed up to the planting portion. [9] A planting portion for planting the brush on the brush planting surface, a pruning unit for pruning the tip of the brush after planting at a predetermined position, and a space between the pruning surface and the planting surface of the brush. Tapered An apparatus for manufacturing a brush having a polishing section to perform,  The polishing section includes at least two types of polishing bodies having different surface shapes, and each of the polishing bodies rotates along a first rotation shaft and is a bearing that supports the first rotation shaft. Is a brush manufacturing apparatus that rotates along a second rotation axis and forms a smooth taper between the trimming surface and the planting surface of the brush. 10. The brush manufacturing apparatus according to claim 9, wherein at least one of the polishing rotators has a large number of polishing protrusions formed on the surface so as to protrude outward from the peripheral surface. .  [11] The plurality of rotating abrasive bodies are arranged linearly adjacent to each other, and the pruned brushes are sequentially brought into contact with the plurality of rotating abrasive bodies so that the pruned surface of the brush and the planting surface The brush manufacturing apparatus according to claim 9 or 10, wherein the gap is polished stepwise.  [12] At least one of the polishing rotators is an abrasive surface having a particle size such that the surface roughness Ra of the brush is less than 0.5 μm. The apparatus for manufacturing a brush according to item 1.  13. The brush manufacturing apparatus according to any one of claims 9 to 12, wherein the brush is a toothbrush for oral cleaning. [14] A brush produced by the brush production apparatus according to any one of claims 9 to 13, wherein the brush has a surface roughness Ra of less than 0.5 m.