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Method of manufacturing toothbrush with needle-shaped bristles, and toothbrush manufactured by the same

A manufacturing method, toothbrush technology, applied to the field of toothbrush, which will be embedded into the bristles of the toothbrush, to achieve the effect of enhanced machinability and high-efficiency embedding

Inactive Publication Date: 2008-03-26
权荣浚 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it is difficult to taper the bristles of such toothbrushes using the above-mentioned traditional tapering method
[0021] In addition to this, the conventional method of bristle tapering suffers from the usual problems, wherein a bristle inserting machine equipped with expensive special equipment is required and skilled labor is required

Method used

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  • Method of manufacturing toothbrush with needle-shaped bristles, and toothbrush manufactured by the same
  • Method of manufacturing toothbrush with needle-shaped bristles, and toothbrush manufactured by the same

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A bristle made of PBT having a thickness of 0.19 mm at the end was embedded in a mold mounted on a bristle fixation injection molding machine (model name: AFT CNC) manufactured by Boucherie, Belgium. Then, the part of the bristles protruding into the cavity of the mold is thermally welded, and resin is injected into the cavity of the mold to manufacture a toothbrush in which the bristles and the toothbrush body are integrated.

[0051] Subsequently, the bristles of the finished toothbrush are cut to a desired height with a finishing machine. Then, the bristles were partially tapered by a drum grinder having a raised portion so that the thickness at the tip of the bristles was 0.08 mm and the length of the tapered portion was 1.5 mm. The finished toothbrush was fixed on a holding jig, and then, the bristles were immersed in a reactor containing a 40% sodium hydroxide solution kept at 120° C. for 16 minutes. Subsequently, the bristles are washed in water, neutralized and...

Embodiment 2

[0054] Before the tapering process of the first embodiment, the bristles are cut so that the embedded bristles form the mountain shape shown in FIG. 3 .

[0055] The bristles on these toothbrushes were tapered in the same manner as in the first embodiment. As a result, the toothbrush bristles have a thickness ranging from 0.01 mm to 0.05 mm at the tip. The length of the tapered portion of the bristles ranges from 4mm to 8mm.

Embodiment 3

[0057] A bristle made of PBT having a thickness of 0.19 mm at the end was inserted into the fixing hole after being folded in half. At this time, 26 bristles are embedded in each fixing hole so that there is a height difference of 3 mm to 4 mm between the longer part and the shorter part of each bristle. After the bristle fixing treatment, the bristles were tapered so that the longer and shorter parts of the bristles had a thickness at the tip of 0.08 mm and a length of 1.5 mm at the tapered part. Thereafter, the bristles were tapered so that the longer portion of the bristles was slightly immersed in the chemical for 15 minutes. As a result, the end thickness of the longer portion of the bristles ranges from 0.01mm to 0.02mm. The length of the tapered portion of the longer portion ranges from 4mm to 7mm. The thickness of the shorter portion of the bristles was maintained at 0.08mm at the end.

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PUM

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Abstract

The present invention provides a method of manufacturing a toothbrush having needle-shaped bristles, and a toothbrush manufactured by the method. The toothbrush manufacturing method of the present invention includes the step of partially tapering ends of bristles, which are made of polyester and are set in a toothbrush body, through a physical grinding process, and the step of completing of a process of tapering the partially tapered bristles by immersing the partially tapered bristles in a chemical. The present invention makes it possible for toothbrush bristles to be tapered through a simple process. Furthermore, the present invention solves conventional difficulties occurring in tapering bristles after setting them in toothbrush bodies.

Description

technical field [0001] The present invention generally relates to a method of manufacturing a toothbrush having needle-shaped bristles and a toothbrush manufactured by the method, and more particularly, to a method of tapering bristles embedded in a toothbrush and a toothbrush manufactured by the method. Background technique [0002] In a conventional method of manufacturing a toothbrush with tapered bristles, a tuft of bristles having a diameter of 0.16mm to 0.2mm at the tip is cut to a predetermined length. Thereafter, the ends of the bristles are hydrolyzed with alkaline chemicals or strongly acidic chemicals to become tapered. Subsequently, the bristles are rinsed in water and dried. The bristles are then folded in half and inserted with anchors into holes formed in the head of the toothbrush body. [0003] However, due to the changing development trend of toothbrushes in recent years, diverse bristle embedding patterns are required. Furthermore, as the size of the br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A46B9/04
CPCA46B2200/1066A46D1/00A46D1/05A46B9/04A46B9/028A46D1/0276
Inventor 权荣浚权成昱权成桓
Owner 权荣浚
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