JP2002225097A - Injection-molded product - Google Patents
Injection-molded productInfo
- Publication number
- JP2002225097A JP2002225097A JP2001027032A JP2001027032A JP2002225097A JP 2002225097 A JP2002225097 A JP 2002225097A JP 2001027032 A JP2001027032 A JP 2001027032A JP 2001027032 A JP2001027032 A JP 2001027032A JP 2002225097 A JP2002225097 A JP 2002225097A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral surface
- injection
- mold
- sectional shape
- triangular
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、射出成形品、射出
成形用金型、及び金型加工方法に関し、特に周面に文
字、図柄等の装飾を凸形彫刻により施した射出成形品、
該射出成形品を成形する射出成形用金型、及び該射出成
形用金型の加工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection-molded article, an injection-molding mold, and a mold processing method, and more particularly to an injection-molded article in which decorations such as characters and patterns are provided on a peripheral surface by convex engraving.
The present invention relates to an injection mold for molding the injection molded article, and a method of processing the injection mold.
【0002】[0002]
【従来の技術及び発明が解決しようとする課題】例えば
洗剤用の計量スプーンや入れ物容器等の底の深い凹部を
有する成形品を合成樹脂によって形成する際には、一般
的に射出成形が採用される。かかる射出成形によれば、
めす金型とおす金型とからなる成形用金型によって形成
されるキャビティ部に樹脂を流入して固化させ、しかる
後にめす金型及びおす金型を抜き出して成形品を得るも
のである。2. Description of the Related Art In the case of forming a molded product having a deep concave portion such as a measuring spoon or a container for a detergent from a synthetic resin, injection molding is generally employed. You. According to such injection molding,
The resin flows into a cavity formed by a molding die composed of a female die and a male die, and is solidified. Thereafter, the female die and the male die are extracted to obtain a molded product.
【0003】また、このような射出成形による成形品に
は、例えば洗剤用の計量スプーンにおいては計量用の目
盛りや数字など、その外周面や内周面に、文字、図柄等
の装飾が凸形彫刻によって施される場合がある。この凸
形彫刻は、キャビティ面であるめす金型の内周面やおす
金型の外周面にこれらの装飾を型取る凹溝を形成し、こ
の凹溝に合成樹脂を充填固化することによって得られ、
文字、図柄等の装飾を浮き立たせて容易に視認できるよ
うにしたものである。[0003] In addition, such injection-molded articles have, for example, a scale or numeral for measurement in the case of a measuring spoon for detergents, in which the decoration such as letters and patterns is convex on the outer and inner surfaces. May be applied by sculpture. This convex sculpture is obtained by forming a concave groove for molding these decorations on the inner peripheral surface of the female die or the outer peripheral surface of the male die which is a cavity surface, and filling and solidifying the concave with the synthetic resin. And
The decorations such as characters and designs are raised so that they can be easily viewed.
【0004】しかしながら、凹溝によって得られた凸形
彫刻は、例えば0.05mm程度の高さしか有すること
ができず、装飾の視認性を十分に確保できなかった。す
なわち、凸形彫刻の高さを高くして視認性を向上させる
べく、凹溝を深くしようとすると、めす金型或いはおす
金型を抜く際にアンダーカット部となる面が高くなりす
ぎて無理抜きすることが困難になり、離型の際にこの面
にダレが生じて、賦形性が劣化するという課題があっ
た。[0004] However, the convex sculpture obtained by the groove can only have a height of, for example, about 0.05 mm, and the visibility of the decoration cannot be sufficiently secured. In other words, when trying to increase the depth of the concave groove to increase the height of the convex sculpture and improve the visibility, the surface serving as the undercut portion when the female or male mold is pulled out becomes too high, and it is impossible. There is a problem in that it becomes difficult to remove the mold, and this surface is sagged at the time of mold release, and the shapeability is deteriorated.
【0005】また、装飾を型取る凹溝は放電加工によっ
て金型の周面に形成されていたが、放電加工は、版下に
忠実な形状の凹溝による装飾をキャビティ面に形成する
ことができる反面、放電加工用のマスターを一つ一つ製
作しなければならず、多くの時間とコストを要すること
になると共に、形成される装飾の自由度に乏しかった。[0005] In addition, the concave groove for molding the decoration is formed on the peripheral surface of the mold by electric discharge machining. However, in the electric discharge machining, the decoration with the concave groove having a shape faithful to the underplate is formed on the cavity surface. On the other hand, masters for electric discharge machining had to be manufactured one by one, which required a lot of time and cost, and the degree of freedom of decoration to be formed was poor.
【0006】本発明は、凸形彫刻の高さを高くすること
を可能にして、当該凸形彫刻による装飾の視認性を容易
に向上させることのできる射出成形品及び該射出成形品
を成形する射出成形用金型の提供を目的とする。According to the present invention, an injection-molded article capable of increasing the height of a convex sculpture and easily improving the visibility of a decoration by the convex sculpture, and molding the injection-molded article. The purpose is to provide a mold for injection molding.
【0007】また、本発明は、射出成形品に凸形彫刻に
よる装飾を形成するための凹溝を、多くの時間とコスト
を要することなく相当の自由度で金型のキャビティ面に
容易に形成することのできる射出成形用金型の金型加工
方法の提供を目的とする。Further, the present invention provides a method for easily forming a concave groove for forming a decoration by a convex sculpture on an injection-molded article with considerable flexibility without requiring much time and cost. It is an object of the present invention to provide a mold processing method for an injection mold that can be performed.
【0008】[0008]
【課題を解決するための手段】本発明は、周面に文字、
図柄等の装飾を凸形彫刻により施してなる射出成形品で
あって、前記凸形彫刻が三角形状又は台形状の横断面形
状を有し、且つ該三角形状又は台形状の横断面形状を有
する凸形彫刻のアンダーカット部となる面が、前記周面
に対して成形用金型の抜き方向に50度以下の角度で傾
斜している射出成形品を提供することにより、上記目的
を達成したものである。According to the present invention, characters,
An injection-molded product obtained by performing decoration such as a pattern by convex engraving, wherein the convex engraving has a triangular or trapezoidal cross-sectional shape, and has the triangular or trapezoidal cross-sectional shape. The object has been achieved by providing an injection-molded product in which a surface serving as an undercut portion of a convex engraving is inclined at an angle of 50 degrees or less in a direction in which a molding die is drawn with respect to the peripheral surface. Things.
【0009】また、本発明は、上記射出成形品を形成す
るためのめす金型とおす金型とからなる成形用金型であ
って、前記めす金型の内周面又は前記おす金型の外周面
のいずれか一方の離型時における抜き方向に沿った周面
に、三角形状又は台形状の横断面形状を有する凹溝によ
って刻設された文字、図柄等の装飾を備え、且つ前記三
角形状又は台形状の横断面形状を有する凹溝の両側壁面
が、前記内周面又は前記外周面に対して50度以下の角
度で傾斜している射出成形用金型を提供することによ
り、上記目的を達成したものである。The present invention also relates to a molding die comprising a female die and a male die for forming the above-mentioned injection-molded article, wherein the inner peripheral surface of the female die or the outer peripheral surface of the male die is provided. On the peripheral surface along the pulling direction at the time of releasing one of the surfaces, a decoration such as a character or a pattern engraved by a concave groove having a triangular or trapezoidal cross-sectional shape is provided, and the triangular shape is provided. Alternatively, the above object is achieved by providing an injection molding die in which both side walls of a concave groove having a trapezoidal cross-sectional shape are inclined at an angle of 50 degrees or less with respect to the inner peripheral surface or the outer peripheral surface. Is achieved.
【0010】さらに、本発明は、三角形状又は台形状の
横断面形状を有する凹溝による装飾を備えた射出成形用
金型の加工方法であって、前記めす金型の内周面又は前
記おす金型の外周面に、文字、図柄等からなる前記凹溝
による装飾の中心線の軌跡を描いた後、該軌跡に沿って
頂角が80〜120度のドリルカッターの先端部をスラ
イド移動しつつ当該軌跡をなぞるようにして前記内周面
又は前記外周面を彫り込むことにより、前記装飾を刻設
することを特徴とする金型加工方法を提供することによ
り、上記目的を達成したものである。Further, the present invention relates to a method of processing an injection molding die provided with decoration by a concave groove having a triangular or trapezoidal cross-sectional shape, wherein the inner peripheral surface of the female die or the male is provided. After drawing the trajectory of the center line of the decoration by the concave groove composed of characters, designs, etc. on the outer peripheral surface of the mold, slide the tip of the drill cutter having an apex angle of 80 to 120 degrees along the trajectory. The above object has been achieved by providing a mold processing method characterized by engraving the decoration by engraving the inner peripheral surface or the outer peripheral surface so as to trace the locus. is there.
【0011】上記記載において、アンダーカット部とな
る面とは、めす金型又はおす金型を抜く際に抵抗となる
面をいう。また、めす金型又はおす金型の抜き方向に沿
った周面とは、必ずしも該抜き方向と平行な周面のみを
意味するものではなく、このような面は一般にめす金型
又はおす金型の抜き易さを鑑みて、抜き方向に対して
0.5〜10度程度の角度で傾斜して設けられるもので
あり、かかる抜き方向に対して僅かに傾斜する方向に沿
った面をも含む趣旨である。In the above description, the surface serving as an undercut portion refers to a surface that becomes a resistance when a female die or a male die is pulled out. Further, the peripheral surface along the drawing direction of the female mold or the male mold does not necessarily mean only the peripheral surface parallel to the drawing direction, and such a surface is generally a female mold or a male mold. In view of the ease of pulling out, it is provided at an angle of about 0.5 to 10 degrees with respect to the pulling direction, and includes a surface along a direction that is slightly tilted with respect to the pulling direction. It is the purpose.
【0012】[0012]
【発明の実施の形態】図1に示す本発明の好ましい実施
形態に係る射出成形品10は、粉末洗剤を計量する合成
樹脂により形成された透明な計量スプーンであって、そ
の底の深い凹部である計量部13の内周面には、計量用
の目盛りや数字、文字等が凸形彫刻11による装飾12
として、内側に突出して設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An injection-molded article 10 according to a preferred embodiment of the present invention shown in FIG. 1 is a transparent measuring spoon formed of a synthetic resin for measuring a powder detergent, and has a deep concave portion at the bottom. On the inner peripheral surface of a certain measuring unit 13, a scale 12 for measurement, numerals, characters and the like are decorated 12 by a convex sculpture 11.
As shown in FIG.
【0013】本実施形態によれば、計量スプーン10は
射出成形によって得られるもので、この射出成形によれ
ば、計量部13は、図2(a)に示すように、めす金型
14とおす金型15とからなる成形用金型16によって
形成されるキャビティ部17に樹脂を流入して固化さ
せ、しかる後にめす金型14及びおす金型15を抜き出
して計量部13の成形品を得るものである(図3(a)
〜(c)参照)。According to the present embodiment, the measuring spoon 10 is obtained by injection molding. According to this injection molding, the measuring section 13 comprises, as shown in FIG. The resin flows into the cavity 17 formed by the molding die 16 composed of the mold 15 and is solidified. Thereafter, the female mold 14 and the male mold 15 are extracted to obtain a molded product of the measuring section 13. Yes (Fig. 3 (a)
To (c)).
【0014】また、本実施形態によれば、離型時におけ
るおす金型15の抜き方向Xに沿った計量部13の内周
面18に施された凸形彫刻11のうち、少なくとも抜き
方向Xと交差する方向に延設される凸形彫刻11が三角
形状の横断面形状を有し、且つこの三角形状の横断面形
状を有する凸形彫刻11のアンダーカット部となる面1
9が、図2(b)に拡大して示すように、内周面18に
対して抜き方向Xに50度以下、好ましくは50〜30
度の角度θ1で傾斜している。According to the present embodiment, at least one of the convex sculptures 11 formed on the inner peripheral surface 18 of the measuring section 13 along the pulling direction X of the male mold 15 at the time of release from the mold. The convex sculpture 11 extending in a direction intersecting with the triangle has a triangular cross-sectional shape, and the surface 1 serving as an undercut portion of the convex sculpture 11 having the triangular cross-sectional shape
9 is 50 degrees or less in the withdrawal direction X with respect to the inner peripheral surface 18 as shown in FIG.
It is inclined at an angle of θ1.
【0015】さらに、本実施形態によれば、三角形状の
横断面形状を有する凸形彫刻11の内周面18からの高
さが0.1〜0.4mmであり、また凸形彫刻11の先
端が円弧状に湾曲していることにより、アンダーカット
部となる面19及びその反対側の面21がR部を介して
頂部20と接続している。Further, according to the present embodiment, the height of the convex sculpture 11 having the triangular cross section from the inner peripheral surface 18 is 0.1 to 0.4 mm, and the height of the convex sculpture 11 is Since the tip is curved in an arc shape, the surface 19 serving as the undercut portion and the surface 21 on the opposite side are connected to the top portion 20 via the R portion.
【0016】めす金型14は、図2(a)及び図3
(a)〜(c)に示されるように、計量部13の外周面
に沿った形状の内周面を備えるキャビ部を有し、このキ
ャビ部はめす側底面壁22とめす側側面壁23とによっ
て囲まれている。めす側側面壁23は、パーティングラ
イン24と垂直な方向である抜き方向Xに対して0.5
〜10度程度の角度で傾斜して、抜き方向Xに沿って立
設している。FIG. 2 (a) and FIG.
(C) As shown in (a) to (c), the weighing portion 13 has a cavity portion having an inner peripheral surface formed along the outer peripheral surface, and the cavity portion has a female bottom wall 22 and a female side wall 23. And is surrounded by The female side wall 23 is 0.5 ° away from the drawing direction X, which is a direction perpendicular to the parting line 24.
It is inclined at an angle of about 10 to 10 degrees and stands upright along the drawing direction X.
【0017】おす金型15は、計量部13の内周面に沿
った形状の外周面を備えるコア部を有し、このコア部は
おす側底面壁25とおす側側面壁26とによって囲まれ
ている。おす側側面壁26は、パーティングライン24
と垂直な方向である抜き方向Xに対して0.5〜10度
程度の角度で傾斜して、抜き方向Xに沿って立設してい
る。おす金型15は、そのコア部をめす金型14のキャ
ビ部に挿入配置しつつパーティングライン24を挟んで
めす金型14と重ね合わせることにより、計量部13の
肉厚に等しい巾のキャビティ部17が形成される。ま
た、キャビティ部17の内側キャビティ面を構成するお
す側側面壁26には、後述する金型加工方法によって、
凸形彫刻11を型取りした、三角形状の横断面形状を有
する凹溝27による目盛りや数字、文字等の装飾が0.
1〜0.4mmの深さで刻設されている。この凹溝27
の両側壁面は、おす金型15の外周面に対して50度以
下の角度で傾斜していることにより、当該凹溝27に合
成樹脂を充填固化することによって得られる凸形彫刻1
1のアンダーカット部となる面19及びその反対側の面
21(図2(b)参照)が、いずれも内周面18に対し
て抜き方向Xに50度以下の角度で傾斜することにな
る。The male mold 15 has a core portion having an outer peripheral surface shaped along the inner peripheral surface of the measuring portion 13, and the core portion is surrounded by a male side bottom wall 25 and a male side side wall 26. I have. The male side wall 26 is used for the parting line 24.
It is inclined at an angle of about 0.5 to 10 degrees with respect to the drawing direction X, which is a direction perpendicular to the drawing direction, and stands up along the drawing direction X. The male mold 15 has a cavity having a width equal to the thickness of the measuring section 13 by being inserted into the cavity of the female mold 14 and overlapping with the female mold 14 with the parting line 24 interposed therebetween. The part 17 is formed. The male side wall 26 constituting the inner cavity surface of the cavity portion 17 is formed by a mold processing method described later.
The decoration such as graduations, numerals, characters, etc. is provided by the concave groove 27 having a triangular cross-sectional shape obtained by molding the convex sculpture 11.
It is engraved at a depth of 1 to 0.4 mm. This groove 27
Are inclined at an angle of 50 degrees or less with respect to the outer peripheral surface of the male mold 15 so that the concave groove 27 is filled with a synthetic resin and solidified to obtain a convex sculpture 1.
Both the surface 19 serving as the undercut portion 1 and the surface 21 on the opposite side (see FIG. 2B) are inclined at an angle of 50 degrees or less in the drawing direction X with respect to the inner peripheral surface 18. .
【0018】本実施形態によれば、おす金型15の抜き
方向Xに沿った外周面であるおす側側面壁26に、三角
形状の横断面形状を有する凹溝27による装飾を容易に
加工形成することができる。すなわち、図4に示すよう
な、先端部の頂角(開き角度)θ2が80〜120度の
ドリルカッター28として例えばボールエンドミルを用
い、おす金型15のおす側側面壁26の所定の位置に、
目盛りや数字等からなる凹溝27による装飾の中心線の
軌跡を描いた後、この軌跡に沿ってボールエンドミル2
8の先端部をスライド移動しつつ当該軌跡をなぞるよう
にしておす側側面壁26を彫り込むことにより、凹溝2
7による装飾が容易に刻設されることになる。According to the present embodiment, the decoration by the concave groove 27 having a triangular cross section is easily formed on the male side wall 26 which is the outer peripheral surface along the pulling direction X of the male mold 15. can do. That is, as shown in FIG. 4, for example, a ball end mill is used as the drill cutter 28 having the apex angle (opening angle) θ2 of 80 to 120 degrees at the tip portion, and the drill cutter 28 is positioned at a predetermined position on the male side wall 26 of the male mold 15. ,
After drawing the trajectory of the center line of the decoration by the concave groove 27 composed of scales and numerals, the ball end mill 2 is moved along the trajectory.
8 by sculpting the side wall 26 so as to follow the trajectory while sliding the tip of the groove 2.
The decoration by 7 is easily engraved.
【0019】ここで、本実施形態によれば、ボールエン
ドミル28による彫り込み深さを調整することにより、
凹溝27、及びこれによって型取りされる凸形彫刻11
の深さ(高さ)及び巾を容易に調整できると共に、頂角
が異なるボールエンドミル28を適宜選択することによ
り、凹溝27の両側壁面、及び凸形彫刻11のアンダー
カット部となる面19及びその反対側の面21の傾斜角
度を容易に調整することができる。またボールエンドミ
ル28の先端は例えばR0.3mm程度の湾曲面となっ
ており、これによって凹溝27の底部及び凸形彫刻11
の先端を円弧状の湾曲面とすることができるようになっ
ている。さらに、凹溝27による装飾は、中心線の軌跡
を描いてこの軌跡に沿ってボールエンドミル28の先端
部をスライド移動しつつおす側側面壁26を彫り込むこ
とによって形成されるので、版下を描いて放電加工用の
マスターを一つ一つ製作する手間のかかる作業を要する
ことなく、相当の自由度で任意の形状の装飾を刻設する
ことができ、これによって、例えば図5に示すような種
々の図柄の凸形彫刻11による装飾を、計量部13の内
周面に0.1〜0.4mm程度の相当の高さで容易に設
けることができる。Here, according to this embodiment, by adjusting the engraving depth by the ball end mill 28,
The concave groove 27 and the convex sculpture 11 molded by the concave groove 27
The depth (height) and width of the groove can be easily adjusted, and by appropriately selecting ball end mills 28 having different apex angles, the side wall surfaces of the concave groove 27 and the surface 19 serving as an undercut portion of the convex engraving 11 can be obtained. And the inclination angle of the surface 21 on the opposite side can be easily adjusted. Further, the tip of the ball end mill 28 has a curved surface of, for example, about R 0.3 mm, so that the bottom of the concave groove 27 and the convex engraving 11 are formed.
Can be formed into an arcuate curved surface. Furthermore, the decoration by the concave groove 27 is formed by drawing the locus of the center line and engraving the side wall 26 while sliding the tip end of the ball end mill 28 along this locus. It is possible to engrave decorations of any shape with a considerable degree of freedom without the troublesome work of drawing and manufacturing masters for electric discharge machining one by one, thereby allowing, for example, as shown in FIG. Various decorations by the convex sculpture 11 can be easily provided on the inner peripheral surface of the measuring section 13 at a considerable height of about 0.1 to 0.4 mm.
【0020】そして、本実施形態によれば、計量スプー
ンの計量部13は、おす金型15をめす金型14に重ね
合わせることにより設けられた成形用金型16のキャビ
ティ部17に合成樹脂を流入して固化させた後、図3
(a)〜(c)に示すように、めす金型14及びおす金
型15を順次抜き出すことによって形成される。すなわ
ち、まず、めす金型14を図3の下方に抜き出してめす
金型14からおす金型15及び固化した計量部13を取
り外し((a)参照)、しかる後に、エジェクターピン
29をおす金型15の中央に差し込んで計量部13を押
し出すことによりおす金型15を図3の上方に抜き出し
て、計量部13を成形用金型16から取り出す((b)
及び(c)参照)。According to the present embodiment, the measuring portion 13 of the measuring spoon puts the synthetic resin into the cavity portion 17 of the molding die 16 provided by superposing the male die 15 on the female die 14. After inflow and solidification, FIG.
As shown in (a) to (c), it is formed by sequentially extracting the female mold 14 and the male mold 15. That is, first, the female mold 14 is pulled out below in FIG. 3 and the male mold 15 and the solidified measuring portion 13 are removed from the female mold 14 (see (a)), and then the ejector pin 29 is pressed. By inserting the measuring unit 13 into the center of the unit 15 and pushing out the measuring unit 13, the male die 15 is extracted upward in FIG. 3, and the measuring unit 13 is removed from the molding die 16 ((b)).
And (c)).
【0021】ここで、本実施形態によれば、計量部13
の内周面18には、おす金型15の凹溝27により型取
りされて、凸形彫刻11による装飾が0.1〜0.4m
m程度の高さで突出しているが、この凸形彫刻11のア
ンダーカット部となる面19は、内周面18に対して抜
き方向Xに50度以下の角度で傾斜しているので、おす
金型15を抜き出す際に、固化した合成樹脂の弾性によ
り外側に変形しつつ凹溝27を容易に乗り越えることが
でき、これによって、凸形彫刻11にダレが生じること
なく、凸形彫刻11の高さを保持したままスムースに無
理抜きされることになる。また、本実施形態によれば、
凸形彫刻11の先端が円弧状に湾曲して、アンダーカッ
ト部となる面19がR部を介して頂部20と接続してい
るので、おす金型15を無理抜きする際のダレの発生を
さらに効果的に回避することが可能になる。Here, according to the present embodiment, the measuring section 13
The inner peripheral surface 18 is molded by the concave groove 27 of the male mold 15 so that the decoration by the convex sculpture 11 is 0.1 to 0.4 m.
m, but the surface 19 serving as an undercut portion of the convex sculpture 11 is inclined at an angle of 50 degrees or less in the drawing direction X with respect to the inner peripheral surface 18. When the mold 15 is extracted, the concave groove 27 can be easily overcome while deforming outward due to the elasticity of the solidified synthetic resin. As a result, the convex engraving 11 can be easily formed without sagging. It will be forcibly pulled out while maintaining the height. According to the present embodiment,
Since the tip of the convex sculpture 11 is curved in an arc shape and the surface 19 serving as the undercut portion is connected to the top portion 20 via the R portion, the occurrence of sagging when the male mold 15 is forcibly removed is prevented. It is possible to avoid more effectively.
【0022】なお、凸形彫刻11のアンダーカット部と
なる面19は、内周面18に対して抜き方向Xに50〜
30度の角度θ1で傾斜していることが好ましい。傾斜
角度θ1を50〜30度とすることにより、ダレの発生
を防止して賦形性を低下させることがなく、また文字に
めりはりをつけて見やすさを向上させることが可能にな
る。また凸形彫刻11の内周面18からの突出高さは
0.1〜0.4mmとすることが好ましい。突出高さを
0.1〜0.4mmとすることにより、文字が浮きでて
見えるようにして見やすさを向上させることができ、ま
たダレの発生を防止して賦形性を低下させることがな
い。The surface 19 serving as the undercut portion of the convex engraving 11 is 50 to 50 mm in the withdrawal direction X with respect to the inner peripheral surface 18.
Preferably, it is inclined at an angle θ1 of 30 degrees. By setting the inclination angle θ1 to 50 to 30 degrees, it is possible to prevent the occurrence of sagging and reduce the shaping property, and to improve the visibility by attaching characters to the characters. It is preferable that the protruding height of the convex sculpture 11 from the inner peripheral surface 18 be 0.1 to 0.4 mm. By setting the protruding height to 0.1 to 0.4 mm, it is possible to improve the visibility by making the characters float and to improve the visibility, and to prevent the occurrence of sagging and to reduce the formability. Absent.
【0023】そして、本実施形態によれば、おす金型1
5の凹溝27により型取りされた凸形彫刻11のアンダ
ーカット部となる面19が、内周面18に対して抜き方
向Xに50度以下の角度で傾斜しているので、ダレを生
じることなく凸形彫刻11の高さを高く保持することが
でき、これによって凸形彫刻11による装飾12の視認
性を容易に向上させることが可能になる。According to this embodiment, the male mold 1
Since the surface 19 serving as an undercut portion of the convex sculpture 11 formed by the concave groove 27 of 5 is inclined at an angle of 50 degrees or less in the drawing direction X with respect to the inner peripheral surface 18, sagging occurs. The height of the convex sculpture 11 can be kept high without any problem, and thus the visibility of the decoration 12 by the convex sculpture 11 can be easily improved.
【0024】なお、本発明は上記実施形態に限定される
ことなく、種々の変更が可能である。例えば、凸形彫刻
は、三角形状の横断面形状を有する必要は必ずしもな
く、側面が傾斜する台形状の横断面形状を有するもので
あってもよい。台形状の横断面形状を有する凸形彫刻を
型取りする凹溝は、例えばドリルカッターにより、中心
線の軌跡を僅かにずらしつつ繰り返し金型の周面を彫り
込むことによって容易に形成することができる。台形状
の横断面形状を有する凸形彫刻による装飾は、その巾が
広がることにより、視認性が向上する。The present invention is not limited to the above embodiment, but can be variously modified. For example, the convex sculpture does not necessarily have to have a triangular cross-sectional shape, and may have a trapezoidal cross-sectional shape with inclined side surfaces. The concave groove for molding a convex sculpture having a trapezoidal cross-sectional shape can be easily formed by repeatedly carving the peripheral surface of the mold while slightly shifting the locus of the center line using a drill cutter, for example. it can. The decoration by the convex sculpture having the trapezoidal cross-sectional shape has an improved visibility due to an increase in the width.
【0025】また、凸形彫刻は射出成形品の内周面から
内側に突出させて設ける必要は必ずしもなく、めす金型
の内周面に凹溝を形成して、射出成形品の外周面から外
側に突出させて設けてもよい。さらに、本発明は、粉末
洗剤の計量スプーンに限定されることなく、入れ物容器
等の射出成形により得られるその他の種々の成形品に凸
形彫刻による装飾を施すべく採用することができる。Also, the convex engraving does not necessarily need to be provided so as to protrude inward from the inner peripheral surface of the injection-molded product. A concave groove is formed in the inner peripheral surface of the female mold, and the convex engraving is formed from the outer peripheral surface of the injection-molded product. It may be provided so as to protrude outward. Furthermore, the present invention is not limited to a measuring spoon of a powder detergent, but can be employed to decorate various other molded products obtained by injection molding such as container containers by convex sculpture.
【0026】[0026]
【発明の効果】本発明の射出成形品及び射出成形用金型
によれば、凸形彫刻の高さを高くすることを可能にし
て、当該凸形彫刻による装飾の視認性を容易に向上させ
ることができる。また、本発明の射出成形用金型の金型
加工方法によれば、射出成形品に凸形彫刻による装飾を
形成するための凹溝を、多くの時間とコストを要するこ
となく相当の自由度で金型のキャビティ面に容易に形成
することができる。According to the injection-molded article and the injection-molding mold of the present invention, the height of the convex sculpture can be increased, and the visibility of the decoration by the convex sculpture can be easily improved. be able to. In addition, according to the method of working a mold for injection molding of the present invention, a concave groove for forming a decoration by convex sculpture on an injection molded product can be provided with a considerable degree of freedom without much time and cost. Thus, it can be easily formed on the cavity surface of the mold.
【図1】本発明の一実施形態に係る射出成形品である計
量スプーンを示す斜視図である。FIG. 1 is a perspective view showing a measuring spoon as an injection molded product according to an embodiment of the present invention.
【図2】(a)は、本発明の一実施形態に係る射出成形
品をめす金型とおす金型とからなる成形用金型によって
形成する状況を示す断面図、(b)は、凸形彫刻の構成
を説明する(a)のA部拡大図である。FIG. 2A is a cross-sectional view showing a state in which an injection molded product according to an embodiment of the present invention is formed by a molding die including a female die and a male die, and FIG. It is an A section enlarged view of (a) explaining composition of a sculpture.
【図3】(a)〜(c)は、成形用金型から射出成形品
を取り出す状況を示す断面図である。FIGS. 3A to 3C are cross-sectional views showing a situation in which an injection molded product is taken out of a molding die.
【図4】ドリルカッターの一例を示す側面図である。FIG. 4 is a side view showing an example of a drill cutter.
【図5】凸形彫刻による装飾を例示する平面図である。FIG. 5 is a plan view illustrating decoration by convex sculpture.
10 射出成形品 11 凸形彫刻 12 装飾 13 計量部(射出成形品) 14 めす金型 15 おす金型 16 成形用金型 17 キャビティ部 18 内周面 19 アンダーカット部となる面 20 頂部 21 アンダーカット部の反対側の面 22 めす側底面壁 23 めす側側面壁 24 パーティングライン 25 おす側底面壁 26 おす側側面壁 27 凹溝 28 ボールエンドミル(ドリルカッター) 29 エジェクターピン X 抜き方向 DESCRIPTION OF SYMBOLS 10 Injection molded article 11 Convex sculpture 12 Decoration 13 Measuring part (injection molded article) 14 Female mold 15 Male mold 16 Molding mold 17 Cavity part 18 Inner peripheral surface 19 Surface to be an undercut part 20 Top part 21 Undercut Opposite side 22 Female bottom wall 23 Female side wall 24 Parting line 25 Male bottom wall 26 Male side wall 27 Groove 28 Ball end mill (drill cutter) 29 Ejector pin X Pulling direction
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大海 毅 東京都墨田区文花2−1−3 花王株式会 社研究所内 Fターム(参考) 4F202 CA11 CB01 CD30 CK11 CK32 CM31 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Takeshi Oumi 2-1-3 Bunka, Sumida-ku, Tokyo F-term in Kao Corporation Research Laboratories 4F202 CA11 CB01 CD30 CK11 CK32 CM31
Claims (5)
より施してなる射出成形品であって、 前記凸形彫刻が三角形状又は台形状の横断面形状を有
し、且つ該三角形状又は台形状の横断面形状を有する凸
形彫刻のアンダーカット部となる面が、前記周面に対し
て成形用金型の抜き方向に50度以下の角度で傾斜して
いる射出成形品。1. An injection-molded product obtained by applying decorations such as characters and designs on a peripheral surface by convex sculpture, wherein the convex sculpture has a triangular or trapezoidal cross-sectional shape, and An injection-molded product in which a surface serving as an undercut portion of a convex sculpture having a shape or a trapezoidal cross-sectional shape is inclined at an angle of 50 degrees or less with respect to the peripheral surface in a direction in which a molding die is removed.
有する凸形彫刻の前記周面からの高さが0.1〜0.4
mmである請求項1記載の射出成形品。2. The height of the convex sculpture having the triangular or trapezoidal cross-sectional shape from the peripheral surface is 0.1 to 0.4.
The injection-molded article according to claim 1, wherein the diameter is in mm.
有する凸形彫刻の前記アンダーカット部となる面がR部
を介して頂部に接続している請求項1又は2に記載の射
出成形品。3. The injection molding according to claim 1, wherein the surface serving as the undercut portion of the convex sculpture having the triangular or trapezoidal cross-sectional shape is connected to a top portion via an R portion. Goods.
形品を形成するためのめす金型とおす金型とからなる成
形用金型であって、 前記めす金型の内周面又は前記おす金型の外周面のいず
れか一方の離型時における抜き方向に沿った周面に、三
角形状又は台形状の横断面形状を有する凹溝によって刻
設された文字、図柄等の装飾を備え、且つ前記三角形状
又は台形状の横断面形状を有する凹溝の両側壁面が、前
記内周面又は前記外周面に対して50度以下の角度で傾
斜している射出成形用金型。4. A molding die comprising a female die and a male die for forming the injection molded product according to claim 1, wherein the inner peripheral surface of the female die or On the peripheral surface along the pulling direction at the time of release of one of the outer peripheral surfaces of the male mold, characters, designs, etc., engraved with concave grooves having a triangular or trapezoidal cross-sectional shape are provided. An injection mold having a concave groove having a triangular or trapezoidal cross-sectional shape, wherein both side surfaces of the groove are inclined at an angle of 50 degrees or less with respect to the inner peripheral surface or the outer peripheral surface.
断面形状を有する凹溝による装飾を備えた射出成形用金
型の加工方法であって、前記めす金型の内周面又は前記
おす金型の外周面に、文字、図柄等からなる前記凹溝に
よる装飾の中心線の軌跡を描いた後、該軌跡に沿って頂
角が80〜120度のドリルカッターの先端部をスライ
ド移動しつつ当該軌跡をなぞるようにして前記内周面又
は前記外周面を彫り込むことにより、前記装飾を刻設す
ることを特徴とする金型加工方法。5. A method for processing an injection molding die provided with decoration by a concave groove having a triangular or trapezoidal cross-sectional shape according to claim 4, wherein the inner peripheral surface of the female die or After drawing the trajectory of the center line of the decoration by the concave groove made of characters, designs, etc. on the outer peripheral surface of the male mold, slide the tip of the drill cutter having an apex angle of 80 to 120 degrees along the trajectory. A mold processing method for engraving the decoration by engraving the inner peripheral surface or the outer peripheral surface so as to trace the locus.
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JP2001027032A JP4282246B2 (en) | 2001-02-02 | 2001-02-02 | Injection molded product |
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Application Number | Priority Date | Filing Date | Title |
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JP2001027032A JP4282246B2 (en) | 2001-02-02 | 2001-02-02 | Injection molded product |
Publications (2)
Publication Number | Publication Date |
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JP2002225097A true JP2002225097A (en) | 2002-08-14 |
JP4282246B2 JP4282246B2 (en) | 2009-06-17 |
Family
ID=18891754
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JP2001027032A Expired - Lifetime JP4282246B2 (en) | 2001-02-02 | 2001-02-02 | Injection molded product |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009066872A (en) * | 2007-09-12 | 2009-04-02 | Onda Seisakusho Seki Kojo:Kk | Manufacturing process of resin molding having undercut part |
JP2010025827A (en) * | 2008-07-22 | 2010-02-04 | Kao Corp | Measuring spoon |
JP2014133577A (en) * | 2013-01-09 | 2014-07-24 | Toppan Printing Co Ltd | Plastic container and mold |
JP2015198036A (en) * | 2014-04-02 | 2015-11-09 | 東レプラスチック精工株式会社 | Packing for coin battery and method for producing the same |
JP2021069948A (en) * | 2021-01-04 | 2021-05-06 | 株式会社バンダイ | Model component |
JP7000367B2 (en) | 2019-02-05 | 2022-01-19 | 株式会社バンダイ | Model parts |
-
2001
- 2001-02-02 JP JP2001027032A patent/JP4282246B2/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009066872A (en) * | 2007-09-12 | 2009-04-02 | Onda Seisakusho Seki Kojo:Kk | Manufacturing process of resin molding having undercut part |
JP2010025827A (en) * | 2008-07-22 | 2010-02-04 | Kao Corp | Measuring spoon |
JP2014133577A (en) * | 2013-01-09 | 2014-07-24 | Toppan Printing Co Ltd | Plastic container and mold |
JP2015198036A (en) * | 2014-04-02 | 2015-11-09 | 東レプラスチック精工株式会社 | Packing for coin battery and method for producing the same |
JP7000367B2 (en) | 2019-02-05 | 2022-01-19 | 株式会社バンダイ | Model parts |
JP2021069948A (en) * | 2021-01-04 | 2021-05-06 | 株式会社バンダイ | Model component |
Also Published As
Publication number | Publication date |
---|---|
JP4282246B2 (en) | 2009-06-17 |
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