JP2002153322A - Handle for brush - Google Patents
Handle for brushInfo
- Publication number
- JP2002153322A JP2002153322A JP2000354940A JP2000354940A JP2002153322A JP 2002153322 A JP2002153322 A JP 2002153322A JP 2000354940 A JP2000354940 A JP 2000354940A JP 2000354940 A JP2000354940 A JP 2000354940A JP 2002153322 A JP2002153322 A JP 2002153322A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- handle
- transparent
- outer layer
- inner layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
- B29C45/1643—Making multilayered or multicoloured articles having a "sandwich" structure from at least three different materials or with at least four layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/42—Brushes
- B29L2031/425—Toothbrush
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Brushes (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は歯ブラシ、頭髪用ブ
ラシ等のブラシ用ハンドルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush handle such as a toothbrush or a hair brush.
【０００２】[0002]
【従来の技術】透明感のある樹脂でブラシを射出成形す
ると、ハンドル部分は肉厚であるため、ボイド（空隙）
が内部に発生する。そのため、ブラシ用ハンドルは透明
性の無い単一層を成す樹脂だけによって成形されてい
る。2. Description of the Related Art When a brush is injection-molded with a transparent resin, a handle portion is thick, so that a void is formed.
Is generated inside. Therefore, the brush handle is formed only of a single layer of resin having no transparency.
【０００３】透明感を出すため、多層にしたものもある
が、これらは成形体を別個に成形し貼り合せたものや、
インサート成形によるものが知られている。[0003] In order to give a sense of transparency, there are also multilayered ones.
An insert molding is known.
【０００４】[0004]
【発明が解決しようとする課題】しかし、貼り合せやイ
ンサート成形により、透明感を付与するには、製造工程
が２工程以上となり、成形時間が長くなり、コストが増
すという問題点があった。However, in order to impart a sense of transparency by laminating or insert molding, there are problems that the number of manufacturing steps is two or more, the molding time is increased, and the cost is increased.
【０００５】また、材料の接着性や安全性等を考慮する
必要があるため、設計の自由度が低いという問題点があ
った。In addition, there is a problem that the degree of freedom in design is low because it is necessary to consider the adhesiveness and safety of the material.
【０００６】本発明の課題は、設計の自由度が高く、透
明感のある肉厚のブラシ用ハンドルを、簡易な方法で提
供することにある。An object of the present invention is to provide a thick brush handle which has a high degree of freedom in design and has a sense of transparency by a simple method.
【０００７】[0007]
【課題を解決するための手段】請求項１の発明は、透明
又は半透明の樹脂からなる外層の内部に着色樹脂からな
る内層を埋包したブラシ用ハンドルである。The invention according to claim 1 is a brush handle in which an inner layer made of a colored resin is embedded in an outer layer made of a transparent or translucent resin.
【０００８】ここで、透明又は半透明とは、内層が目視
できれば良く、有色の透明であっても良い。Here, "transparent" or "translucent" means that the inner layer can be seen, and it may be colored transparent.
【０００９】[0009]
【発明の実施の形態】図１、図２は肉厚の歯ブラシ用ハ
ンドル１０を射出成形金型１を用いて、サンドイッチ射
出成形法により下記(1)〜(4)の如くに成形する手順を示
すものである。ここでサンドイッチ射出成形法とは、２
種以上の材料を使用して、１組の金型に対して、その金
型の同一のゲートから、２組の射出機構を交互に切り替
えることによって材料を射出し、成形する方法である。
ここでは、金型温度を20℃、射出樹脂温度を250℃、射
出圧力を112kgf/cm2とした。1 and 2 show a procedure for molding a thick toothbrush handle 10 by a sandwich injection molding method using an injection mold 1 as shown in the following (1) to (4). It is shown. Here, the sandwich injection molding method means
In this method, two or more injection mechanisms are alternately switched from one and the same gate of the mold to one set of molds by using at least one kind of material, and molding is performed.
Here, the mold temperature was 20 ° C., the injection resin temperature was 250 ° C., and the injection pressure was 112 kgf / cm 2 .
【００１０】(1) 金型１に透明（又は半透明）樹脂を3.
0sec間射出して外層１１を成形する（図１（Ａ））。透
明樹脂は、例えばポリエチレンテレフタレート（ＰＥ
Ｔ）、ポリスチレン（ＰＳ）、アクリルニトリルスチレ
ン（ＡＳ）、ポリアクリル（ＰＭＭＡ）等を採用でき
る。ここでは、無色透明のポリエチレンテレフタレート
系樹脂を用いた。(1) A mold 1 is made of a transparent (or translucent) resin.
The outer layer 11 is molded by injecting for 0 sec (FIG. 1A). The transparent resin is, for example, polyethylene terephthalate (PE)
T), polystyrene (PS), acrylonitrile styrene (AS), polyacryl (PMMA) and the like can be adopted. Here, a colorless and transparent polyethylene terephthalate resin was used.
【００１１】(2) 外層１１の内部に、少量の着色樹脂を
0.3sec間射出して第１内層１２を成形する（図１
（Ｂ））。着色樹脂は、例えば上述(1)の透明樹脂に着
色剤を加えたものを採用できる。(2) Put a small amount of colored resin inside the outer layer 11
Inject for 0.3 sec to form the first inner layer 12 (FIG. 1
(B)). As the coloring resin, for example, a resin obtained by adding a coloring agent to the transparent resin of the above (1) can be adopted.
【００１２】(3) 第１内層１２の内部に、前述(1)にお
けると同一の透明樹脂を1.2sec間射出して透明中間層１
３を成形する（図１（Ｃ））。(3) The same transparent resin as in the above (1) is injected into the first inner layer 12 for 1.2 seconds to form the transparent intermediate layer 1.
3 (FIG. 1 (C)).
【００１３】(4) 透明中間層１３の内部に、前述(2)に
おけると同一色の着色樹脂を2.0sec間射出して第２内層
１４を成形し（図１（Ｄ））、そして最後に透明樹脂を
4.5sec間射出して充填を完了する（図１（Ｅ））。最後
に透明樹脂を射出した方が、次の成形が透明樹脂から始
まるため、生産性の観点から好ましく、また、着色樹脂
を完全に埋包できるという点からも好ましい。ハンドル
１０にあっては、図２に示す如く、外側寄りの第１内層
１２の一部（基部）で内側寄りの第２内層１４を包み、
かつ第１内層１２の色濃度を第２内層１４の色濃度に比
して低濃度にしたものである。第１内層１２は少量の着
色樹脂を長くかつ薄く引き伸ばされて第２内層１４より
も低濃度になる。(4) A second inner layer 14 is formed by injecting the same color resin as in the above (2) for 2.0 seconds into the transparent intermediate layer 13 (FIG. 1 (D)). Transparent resin
Inject for 4.5 seconds to complete the filling (FIG. 1 (E)). Injecting the transparent resin at the end is preferable from the viewpoint of productivity since the next molding starts from the transparent resin, and is also preferable from the viewpoint that the colored resin can be completely embedded. In the handle 10, as shown in FIG. 2, a part (base) of the first inner layer 12 on the outer side wraps the second inner layer 14 on the inner side,
Further, the color density of the first inner layer 12 is lower than the color density of the second inner layer 14. The first inner layer 12 is formed by stretching a small amount of the colored resin to be longer and thinner, and has a lower concentration than the second inner layer 14.
【００１４】ハンドル１０にあっては、上述(2)、(4)の
着色樹脂の射出開始タイミングと射出終了タイミング
を、ハンドル１０の充填完了の範囲内にて適宜変更する
ことにより、内層１２、１４の形状を変形できる。In the handle 10, by appropriately changing the injection start timing and the injection end timing of the colored resin described in (2) and (4) as long as the filling of the handle 10 is completed, the inner layer 12, 14 can be deformed.
【００１５】尚、内層１２、１４を構成する着色樹脂
は、外層１１、透明中間層１３を構成する透明樹脂に着
色剤を加えたものに限らず、外層１１、透明中間層１３
を構成する透明樹脂と異材質のものでも良い。また、内
層１２、１４のそれぞれを構成する着色樹脂も互いに同
一材質に限らず異材質でも良く、或いはそれらの色を互
いに異なるものとしても良い。また、内層１２、１４、
透明中間層１３は外層１１の内部に包まれるから、外層
１１、第１内層１２、透明中間層１３、第２内層１４の
間で接着性は必要とされない。The colored resin forming the inner layers 12 and 14 is not limited to a resin obtained by adding a coloring agent to the transparent resin forming the outer layer 11 and the transparent intermediate layer 13.
May be made of a different material from that of the transparent resin. Further, the colored resins constituting each of the inner layers 12 and 14 are not limited to the same material but may be different materials, or the colors thereof may be different from each other. Also, the inner layers 12, 14,
Since the transparent intermediate layer 13 is wrapped inside the outer layer 11, adhesiveness is not required between the outer layer 11, the first inner layer 12, the transparent intermediate layer 13, and the second inner layer 14.
【００１６】本実施形態によれば、以下の作用がある。 ハンドル１０の外層１１を透明又は半透明の樹脂によ
り形成し、内層１２、１４を着色樹脂により形成したか
ら、ハンドル１０が肉厚でもボイド（空隙）を不可視と
できる。ここで肉厚とは、3mm以上の厚さを有するもの
をいい、本発明の効果は、特に5mm以上の厚さのあるハ
ンドルに適用した場合に顕著である。また、透明又は半
透明とは、内層が目視できれば良く、有色の透明であっ
ても良い。このとき、外層１１の内部の２層以上の内層
１２、１４を着色樹脂により形成し、かつ外側寄りの内
層１２の一部で内側寄りの内層１４を包み、外側寄りの
内層１２の色濃度を内側寄りの内層１４の色濃度に比し
て低濃度にすることにより、外側寄りの内層１２を着色
半透明状にし、この外側寄りの内層１２が内側寄りの内
層１４を包む部分から包まない部分に向けて色濃度を漸
次的に淡くするような色調の変化を得ることができる。
従って、透明感があり、かつ色調の変化がある美しいハ
ンドル１０を得ることができる。According to this embodiment, the following operations are provided. Since the outer layer 11 of the handle 10 is formed of a transparent or translucent resin, and the inner layers 12 and 14 are formed of a colored resin, voids (voids) can be made invisible even when the handle 10 is thick. Here, the term "thickness" refers to a material having a thickness of 3 mm or more, and the effect of the present invention is particularly remarkable when applied to a handle having a thickness of 5 mm or more. The term “transparent or translucent” means that the inner layer can be seen, and it may be colored and transparent. At this time, two or more inner layers 12 and 14 inside the outer layer 11 are formed of a colored resin, and a part of the inner layer 12 on the outer side wraps the inner layer 14 on the inner side to reduce the color density of the inner layer 12 on the outer side. By making the density lower than the color density of the inner layer 14 on the inner side, the outer layer 12 is colored and translucent, and the outer layer 12 is not wrapped around the inner layer 14 on the inner side. , It is possible to obtain a change in color tone such that the color density gradually decreases.
Therefore, it is possible to obtain a beautiful handle 10 having a sense of transparency and a change in color tone.
【００１７】外層１１の材料と内層１２、１４の材料
を異材質とし、ハンドル１０の物性を調整できる。即
ち、内層１２、１４の樹脂として多様なものを採用で
き、ハンドル１０の設計の自由度を向上できる。例え
ば、外層１１に柔軟な樹脂を用い、内層１２、１４に硬
い樹脂を用いることで、曲げ強度の高いハンドル１０を
得ることができる。ここで、内層１２、１４には硬い樹
脂を用いるだけでなく、顔料等を練り込むことにより、
その強度を向上させても良い。特に、本発明にあって
は、使用時の連続的な曲げ負荷により、疲労破壊し易い
透明樹脂を用いた場合でも、透明樹脂を着色樹脂と一体
として成形し、着色樹脂を透明樹脂に完全に埋包してい
るため、内層１２、１４と外層１１とで剥離や脱落が生
じず、その疲労破壊を防止できる。また、耐薬品強度の
高い樹脂を外層１１にだけ用いて、内層１２、１４には
耐薬品強度の低い樹脂を用いながら一定の耐薬品性能を
備えたハンドル１０を低コストで得ることができる。ま
た、口腔内での使用等を忌避すべき樹脂も内層１２、１
４として用い、これを外層１１によって完全に包むこと
により、衛生上の不都合を回避できる。By using different materials for the outer layer 11 and the inner layers 12 and 14, the physical properties of the handle 10 can be adjusted. That is, various resins can be adopted as the resin for the inner layers 12 and 14, and the degree of freedom in designing the handle 10 can be improved. For example, by using a soft resin for the outer layer 11 and a hard resin for the inner layers 12 and 14, the handle 10 having high bending strength can be obtained. Here, not only a hard resin is used for the inner layers 12 and 14, but also a pigment or the like is kneaded,
The strength may be improved. In particular, in the present invention, due to continuous bending load during use, even in the case of using a transparent resin that is easily broken by fatigue, the transparent resin is molded integrally with the colored resin, and the colored resin is completely formed into the transparent resin. Since the inner layer 12 and 14 are embedded, the inner layers 12 and 14 and the outer layer 11 do not peel or fall off from each other, and can prevent the fatigue damage. Further, a handle 10 having a certain chemical resistance can be obtained at low cost by using a resin having high chemical resistance only for the outer layer 11 and using a resin having low chemical resistance for the inner layers 12 and 14. In addition, the resin which should be avoided in the oral cavity is also used for the inner layers 12 and 1.
By using it as 4 and completely wrapping it with the outer layer 11, inconvenience in hygiene can be avoided.
【００１８】図３、図４は肉厚の歯ブラシ用ハンドル２
０を射出成形金型２を用いて下記(1)、(2)の如くに成形
する手順を示すものである。FIGS. 3 and 4 show a thick toothbrush handle 2.
0 shows the procedure for molding the injection mold 0 using the injection mold 2 as shown in the following (1) and (2).
【００１９】(1)金型２に透明（又は半透明）樹脂を射
出して外層２１を成形する（図３（Ａ））。(1) A transparent (or translucent) resin is injected into the mold 2 to form the outer layer 21 (FIG. 3A).
【００２０】(2)外層２１の内部に、着色樹脂を射出し
て内層２２を成形し（図３（Ｂ））、そして、最後に透
明樹脂を射出して充填を完了する（図３（Ｃ）、図
４）。最後に透明樹脂を射出した方が、次の成形が透明
樹脂から始まるため、生産性の観点から好ましく、ま
た、着色樹脂を完全に埋包できるという点からも好まし
い。(2) A colored resin is injected into the outer layer 21 to form the inner layer 22 (FIG. 3 (B)), and finally, a transparent resin is injected to complete the filling (FIG. 3 (C)). ), FIG. 4). Injecting the transparent resin at the end is preferable from the viewpoint of productivity since the next molding starts from the transparent resin, and is also preferable from the viewpoint that the colored resin can be completely embedded.
【００２１】ハンドル２０にあっては上述(2)の着色樹
脂の射出開始タイミングと射出終了タイミングを、ハン
ドル２０の充填完了の範囲内にて適宜変更することによ
り、内層２２の形状を図３（Ｄ）又は（Ｅ）の如くに変
形できる。In the handle 20, the shape of the inner layer 22 is changed by appropriately changing the injection start timing and the injection end timing of the colored resin in the above (2) within the range of the completion of filling of the handle 20. It can be modified as in (D) or (E).
【００２２】尚、内層２２を構成する着色樹脂は、外層
２１を構成する透明樹脂に着色剤を加えたものに限ら
ず、外層２１を構成する透明樹脂と異材質からなるもの
でも良い。また、内層２２は外層２１の内部に包まれる
から、外層２１、内層２２の間で接着性は必要とされな
い。The colored resin forming the inner layer 22 is not limited to a resin obtained by adding a coloring agent to the transparent resin forming the outer layer 21, but may be made of a different material from the transparent resin forming the outer layer 21. Also, since the inner layer 22 is wrapped inside the outer layer 21, no adhesiveness is required between the outer layer 21 and the inner layer 22.
【００２３】本実施形態によれば以下の作用がある。 ハンドル２０の外層２１を透明又は半透明の樹脂によ
り形成し、内層２２を着色樹脂により形成したから、ハ
ンドル２０が肉厚でもボイド（空隙）を不可視とでき
る。According to this embodiment, the following operations are provided. Since the outer layer 21 of the handle 20 is formed of a transparent or translucent resin and the inner layer 22 is formed of a colored resin, even if the handle 20 is thick, voids (voids) can be made invisible.
【００２４】外層２１の材料と内層２２の材料を異材
質とし、ハンドル２０の物性を調整できる。即ち、内層
２２の樹脂として多様なものを採用でき、ハンドル２０
の設計の自由度を向上できる。例えば、外層２１に柔軟
な樹脂を用い、内層２２に硬い樹脂を用いることで、曲
げ強度の高いハンドル２０を得ることができる。また、
耐薬品強度の高い樹脂を外層２１にだけ用いて、内層２
２には耐薬品強度の低い樹脂を用いながら一定の耐薬品
性能を備えたハンドル２０を低コストで得ることができ
る。また、口腔内での使用等を忌避すべき樹脂も内層２
２として用い、これを外層２１によって完全に包むこと
により、衛生上の不都合を回避できる。By making the material of the outer layer 21 and the material of the inner layer 22 different materials, the physical properties of the handle 20 can be adjusted. That is, various resins can be adopted as the resin of the inner layer 22,
Design flexibility can be improved. For example, by using a soft resin for the outer layer 21 and a hard resin for the inner layer 22, the handle 20 having high bending strength can be obtained. Also,
By using a resin having high chemical resistance only for the outer layer 21, the inner layer 2
For 2, a handle 20 having a certain chemical resistance can be obtained at a low cost while using a resin having a low chemical resistance. In addition, the resin which should avoid use in the oral cavity is also contained in the inner layer 2.
By using it as 2 and completely wrapping it with the outer layer 21, it is possible to avoid inconvenience in hygiene.
【００２５】尚、本発明の実施に用いる成形機は、先行
射出材料の内部に後続射出材料を突出できるものであれ
ば良く、例えば、ＦＮ−Ｄ混色成形機（日精樹脂工業社
製）が挙げられる。The molding machine used in the practice of the present invention may be any machine that can project the succeeding injection material into the preceding injection material. For example, an FN-D mixed color molding machine (manufactured by Nissei Plastic Industries Co., Ltd.) may be used. Can be
【００２６】[0026]
【発明の効果】以上のように本発明によれば、設計の自
由度が高く、透明感のある肉厚のブラシ用ハンドルを、
簡易な方法で提供することができる。As described above, according to the present invention, a thick brush handle having a high degree of freedom in design and having a sense of transparency is provided.
It can be provided in a simple manner.
【図１】図１は歯ブラシの成形手順を示す模式図であ
る。FIG. 1 is a schematic view showing a procedure for forming a toothbrush.
【図２】図２は図１のII−II線に沿う断面図である。FIG. 2 is a sectional view taken along the line II-II in FIG.
【図３】図３は歯ブラシの他の成形手順を示す模式図で
ある。FIG. 3 is a schematic view showing another forming procedure of the toothbrush.
【図４】図４は図３のIV−IV線に沿う断面図である。FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;
１０、２０ ハンドル １１、２１ 外層 １２、１４、２２ 内層 10, 20 Handle 11, 21 Outer layer 12, 14, 22 Inner layer
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3B202 AA06 AA11 AB01 CA05 HA02 4F206 AA13 AA21 AA24 AB12 AG03 AH72 JA07 JB23 JB28 JL02 JM04 JN12 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B202 AA06 AA11 AB01 CA05 HA02 4F206 AA13 AA21 AA24 AB12 AG03 AH72 JA07 JB23 JB28 JL02 JM04 JN12
Claims (2)
部に着色樹脂からなる内層を埋包したブラシ用ハンド
ル。1. A brush handle in which an inner layer made of a colored resin is embedded in an outer layer made of a transparent or translucent resin.
て、次いで前記透明又は半透明の樹脂の内部に着色樹脂
を射出するブラシ用ハンドルの成形方法。2. A method for molding a brush handle, which comprises injecting a transparent or translucent resin into a mold and then injecting a colored resin into the transparent or translucent resin.
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|---|---|---|---|
| JP2000354940A JP4159739B2 (en) | 2000-11-21 | 2000-11-21 | Brush handle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000354940A JP4159739B2 (en) | 2000-11-21 | 2000-11-21 | Brush handle |
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| Publication Number | Publication Date |
|---|---|
| JP2002153322A true JP2002153322A (en) | 2002-05-28 |
| JP4159739B2 JP4159739B2 (en) | 2008-10-01 |
Family
ID=18827444
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000354940A Expired - Fee Related JP4159739B2 (en) | 2000-11-21 | 2000-11-21 | Brush handle |
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| Country | Link |
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| JP (1) | JP4159739B2 (en) |
Cited By (13)
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| JP2010536518A (en) * | 2007-08-31 | 2010-12-02 | ゲーカー・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Cosmetic unit parts |
| EP2554353A1 (en) * | 2011-08-05 | 2013-02-06 | Trisa Holding AG | Tooth brush and method for the manufacture of a tooth brush |
| JP2013256085A (en) * | 2012-06-14 | 2013-12-26 | Mitsubishi Pencil Co Ltd | Outer member of writing instrument |
| US8813296B2 (en) | 2009-12-18 | 2014-08-26 | Colgate-Palmolive Company | Oral care implement having multi-component handle |
| US20150164211A1 (en) * | 2012-05-17 | 2015-06-18 | Colgate-Palmolive Company | Oral care implement and method of manufacturing an oral care implement |
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| USD777446S1 (en) | 2015-07-23 | 2017-01-31 | Colgate-Palmolive Company | Oral care implement handle |
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| BE1026311B1 (en) * | 2018-05-29 | 2020-04-06 | Zahoransky Automation & Molds GmbH | Injection molding process, use of a sensor and injection molding machine |
| WO2020262352A1 (en) * | 2019-06-28 | 2020-12-30 | ライオン株式会社 | Toothbrush |
| CN114347380A (en) * | 2022-01-21 | 2022-04-15 | 广州汪辉眼镜配件有限公司 | Method for manufacturing nose pad |
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| WO2017012109A1 (en) | 2015-07-23 | 2017-01-26 | Colgate-Palmolive Company | Oral care implement |
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| JPH1052835A (en) * | 1996-08-12 | 1998-02-24 | Polyplastics Co | Method for sandwich molding of resin molded article, its mold and resin molded article |
| JPH10179258A (en) * | 1996-12-20 | 1998-07-07 | Matsushita Electric Works Ltd | Toothbrush, its manufacture, and its die |
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