JP2002234047A - Insert nut for resin molding - Google Patents
Insert nut for resin moldingInfo
- Publication number
- JP2002234047A JP2002234047A JP2001031818A JP2001031818A JP2002234047A JP 2002234047 A JP2002234047 A JP 2002234047A JP 2001031818 A JP2001031818 A JP 2001031818A JP 2001031818 A JP2001031818 A JP 2001031818A JP 2002234047 A JP2002234047 A JP 2002234047A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- resin
- mold
- insert nut
- molded product
- 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.)
- Pending
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はナットを合成樹脂に
インサート成形する樹脂成形品用インサートナットに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert nut for a resin molded product in which a nut is insert-molded in a synthetic resin.
【０００２】[0002]
【従来の技術】一般に、電子機器などの合成樹脂製の筐
体内に収容されるプリント基板等の構成部材と筐体間等
の固定には、樹脂製の筐体の成形時に金属製のナットを
埋め込んだインサートナットを利用することが行われ
る。インサートナットに金属ネジを螺合させて上記のよ
うな構成部材を筐体に固定すれば、構成部材が筐体に着
脱自在に強固に固定できるので緩みが少なく保守管理に
も適する。ただし、インサートナットの埋め込み個数が
多くなると、部品数が増加してコストが嵩み金型も複雑
化するので必要最小限に留めることが肝要である。2. Description of the Related Art Generally, a metal nut is used to fix a component such as a printed circuit board housed in a synthetic resin housing of an electronic device or the like to a housing or the like at the time of molding the resin housing. Utilizing an embedded insert nut is performed. If the above-described components are fixed to the housing by screwing a metal screw to the insert nut, the components can be firmly detachably and firmly fixed to the housing. However, if the number of insert nuts to be embedded increases, the number of parts increases, the cost increases, and the mold becomes complicated. Therefore, it is important to minimize the number of insert nuts.
【０００３】[0003]
【発明が解決しようとする課題】上述のように、電子機
器におけるプリント基板等の構成部材と筐体間等の固定
には、従来から成形時の筐体に埋め込んだインサートナ
ットが利用されている。図３は従来のナットの構成を示
す断面図である。図３において、１は樹脂部材である。
図示のように、樹脂部材１は金型を使って板状に成形さ
れている。２は樹脂部材を構成する合成樹脂、３は合成
樹脂２に埋め込まれた金属からなるインサートナット、
３１はインサートナット３に貫通して設けられたネジ
孔、３２はネジ孔３１の内面に螺設された雌ネジであ
る。As described above, an insert nut embedded in a casing at the time of molding is conventionally used for fixing between components such as a printed circuit board and a casing in an electronic device. . FIG. 3 is a sectional view showing the configuration of a conventional nut. In FIG. 3, reference numeral 1 denotes a resin member.
As shown, the resin member 1 is formed into a plate shape using a mold. 2 is a synthetic resin constituting a resin member, 3 is an insert nut made of metal embedded in the synthetic resin 2,
Reference numeral 31 denotes a screw hole penetrating through the insert nut 3, and 32 denotes a female screw threaded on the inner surface of the screw hole 31.
【０００４】図３に示されたような樹脂部材１は、金属
のナット３を金型にセットして溶融樹脂を注入して成形
される。この場合、樹脂の溶融度（粘度）や金型の製作
精度等の成形条件により、セットしたナット３と金型と
の隙間を通して溶融樹脂がネジ孔３１に流入するような
ことが発生する。２１は流入樹脂である。流入樹脂２１
のネジ孔３１への流入は、塵埃類の隙間への介在や金型
の利用度に伴う老朽化等によっても生じることが多い。
流入樹脂２１が固化すると雌ネジ３２のネジ山が潰さ
れ、組立時のネジの螺入に支障があるばかりか、甚だし
いときには成形した樹脂部材１が不良品扱いになって廃
棄しなければならなくなる等の問題点があった。A resin member 1 as shown in FIG. 3 is formed by setting a metal nut 3 in a mold and injecting a molten resin. In this case, depending on molding conditions such as the degree of melting (viscosity) of the resin and the manufacturing accuracy of the mold, the molten resin may flow into the screw hole 31 through the gap between the set nut 3 and the mold. 21 is an inflow resin. Inflow resin 21
Flows into the screw holes 31 in many cases due to the presence of dust in the gaps and aging due to the use of the mold.
When the inflow resin 21 is solidified, the threads of the female screw 32 are crushed, which not only hinders the screwing of the screw at the time of assembling, but in extreme cases, the molded resin member 1 is treated as a defective product and must be discarded. There were problems such as.
【０００５】本発明はこのような従来の問題点を解消す
る為めになされたもので、溶融樹脂のネジ孔３１への流
入を防止して、歩留まりのよいインサートナットを一体
成形した樹脂部材１を実現することを目的とする。[0005] The present invention has been made to solve such a conventional problem, and is intended to prevent a molten resin from flowing into a screw hole 31 and integrally mold an insert nut having a high yield. The purpose is to realize.
【０００６】[0006]
【課題を解決するための手段】本発明は、樹脂成形用の
金型にナットをセットしてナットの端面を露出させて樹
脂成形する樹脂成形品用インサートナットにおいて、ナ
ットの端面に成形用の型に接触してネジ孔の周辺を囲む
突出壁を形成した樹脂成形品用インサートナットを構成
したものである。また、上記において、突出壁の先端を
尖角状に形成した樹脂成形品用インサートナットを構成
したものである。また、本発明はキャビティ型とコア型
とよりなる樹脂成形用の型にナットをセットしてナット
の端面を露出させて樹脂成形する樹脂成形品用インサー
トナットにおいて、ナットの端面に、キャビティ型およ
びコア型の両方に接触してネジ孔の周辺を囲む突出壁を
形成した樹脂成形品用インサートナットを構成したもの
である。さらに、上記において、突出壁の先端を尖角状
に形成した樹脂成形品用インサートナットを構成したも
のである。SUMMARY OF THE INVENTION The present invention relates to an insert nut for a resin molded product in which a nut is set in a resin molding die and the end face of the nut is exposed to form the resin. An insert nut for a resin molded product is provided which has a protruding wall surrounding a screw hole in contact with a mold. Further, in the above, the present invention constitutes an insert nut for a resin molded product in which the tip of the protruding wall is formed in a pointed shape. Further, the present invention provides an insert nut for a resin molded product in which a nut is set in a mold for resin molding consisting of a cavity mold and a core mold, and an end face of the nut is exposed to perform resin molding. An insert nut for a resin molded product is provided which has a protruding wall surrounding the periphery of the screw hole in contact with both of the core molds. Further, in the above, an insert nut for a resin molded product in which the tip of the protruding wall is formed in a pointed shape is formed.
【０００７】[0007]
【発明の実施の形態】実施の形態１．図１は本発明方法
の成形状態を示す断面図で、（ａ）は金型の断面図、
（ｂ）は（ａ）の部分拡大図、（ｃ）は（ｂ）の要部拡
大図、図２の（ａ），（ｂ），（ｃ）は本発明の成形動
作を示す断面図である。本発明の実施の形態を説明する
図面の構成部材においても、図３の従来説明用の図面と
同一の数字符号が付されていて一部重複するが、ここで
は少し詳しく説明する。図１において、１はケースやパ
ネル等のキャップ状の樹脂部材。２は樹脂部材１の主要
部を構成するＡＢＳのような合成樹脂、３はナット、３
１はそのネジ孔、３２は雌ネジ、３３はネジ孔３１の入
口の面取りである。また、４は樹脂成形用の金型であ
る。４１は金型４における凸状のコア型、４２は凹状の
キャビティ型である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a cross-sectional view showing a molding state of the method of the present invention.
(B) is a partially enlarged view of (a), (c) is an enlarged view of a main part of (b), and (a), (b) and (c) of FIG. 2 are cross-sectional views showing a molding operation of the present invention. is there. Components of the drawings for explaining the embodiments of the present invention are also denoted by the same reference numerals as those of the drawings for explanation of the prior art in FIG. 3 and partially overlap with each other, but will be described in some detail here. In FIG. 1, reference numeral 1 denotes a cap-shaped resin member such as a case or a panel. 2 is a synthetic resin such as ABS which constitutes a main part of the resin member 1, 3 is a nut, 3
1 is a screw hole, 32 is a female screw, and 33 is a chamfer at the entrance of the screw hole 31. Reference numeral 4 denotes a resin molding die. 41 is a convex core mold in the mold 4, and 42 is a concave cavity mold.
【０００８】ナット３には金型４より軟らかい金属材か
用いられて規格化された六角形の普通のナットの外に、
外周に滑り止め用のローレット加工を施した特殊のナッ
ト等も利用される。コア型４１とゲート４３を設けたキ
ャビティ型４２とは対構造に作られて、内部に樹脂部材
１と相似形のキャビティ空間が形成されている。本発明
の実施の形態１においては、特に図（ｃ）の拡大図に示
すようにナット３に断面が三角形の突出壁３４が形成さ
れている。この突出壁３４は図示のように先端が尖角状
に形成されて、ナット３のネジ孔３１の周辺を囲んで上
下の両方の端面３５に同心円環状に設けられている。[0008] In addition to a standard hexagonal nut that is made of a metal material softer than the mold 4 and is standardized for the nut 3,
A special nut or the like with a knurled anti-slip surface on the outer periphery is also used. The core mold 41 and the cavity mold 42 provided with the gate 43 are formed in a pair structure, and a cavity space similar to the resin member 1 is formed therein. In the first embodiment of the present invention, a protruding wall 34 having a triangular cross section is formed on the nut 3 as shown in an enlarged view of FIG. As shown in the figure, the protruding wall 34 has a pointed tip, and is provided concentrically on both upper and lower end faces 35 around the periphery of the screw hole 31 of the nut 3.
【０００９】上記のような樹脂部材１を樹脂成形するに
は、射出成形機（不図示）に組み込まれた金型４におけ
るコア型４１の左右の所定の位置にナット３が位置決め
してセットされる。そして、加熱により溶融状態になっ
た合成樹脂２がゲート４３を介して、金型４内に形成さ
れたキャビティ空間の注入されることになる。このとき
の樹脂部材１の成形動作が、図２の（ａ）〜（ｃ）に示
めされている。図２の（ａ）はナット３をセットしたコ
ア型４１に、上部のキャビティ型４２を接近させる。次
いで、矢印に示すように、接近したコア型４１とキャビ
ティ型４２を型締めする。In order to mold the resin member 1 as described above, the nut 3 is positioned and set at predetermined positions on the left and right of the core mold 41 in the mold 4 incorporated in an injection molding machine (not shown). You. Then, the synthetic resin 2 in a molten state by heating is injected into the cavity space formed in the mold 4 through the gate 43. The molding operation of the resin member 1 at this time is shown in FIGS. FIG. 2A shows that the upper cavity mold 42 is brought closer to the core mold 41 on which the nut 3 is set. Next, as shown by an arrow, the approached core mold 41 and cavity mold 42 are clamped.
【００１０】金型４の上下方向から加えられた型締めに
より、三角形の突出壁３４の先端が押し潰される。この
結果、上下の突出壁３４が台形状に変形して、コア型４
１とキャビティ型４２に密着する。こうして、上下の突
出壁３４が密着した状態で、上記した溶融状態の合成樹
脂２がゲート４３から注入される。注入した樹脂２が冷
却してから、（ｃ）の矢印のように金型４が開放されて
図１の（ａ）に示すようなナット３をインサートした樹
脂部材１が金型４から取り出されるようになっている。The top end of the triangular protruding wall 34 is crushed by the mold clamping applied from above and below the mold 4. As a result, the upper and lower projecting walls 34 are deformed into trapezoidal shapes, and the core mold 4
1 and the cavity mold 42. Thus, the synthetic resin 2 in the molten state is injected from the gate 43 in a state where the upper and lower projecting walls 34 are in close contact with each other. After the injected resin 2 has cooled, the mold 4 is opened as shown by the arrow (c), and the resin member 1 into which the nut 3 is inserted as shown in FIG. It has become.
【００１１】上述のように、本発明によれば溶融樹脂２
の注入時には、突出壁３４が強い型締め力を受けて変形
して金型４に密着する。この結果、ナット３のネジ孔３
１の周囲が封鎖状態に保持されているので、溶融樹脂２
のネジ孔３１内への流入が完全に阻止されることにな
る。したがって、前記の従来のように、固化した流入樹
脂２１で雌ネジ３２のネジ山が潰されるようなことがな
い。また、組立時のネジの螺入に不都合が生じるような
こともなく、成形した樹脂部材１が不良品になるような
問題を防止することも可能になる。As described above, according to the present invention, the molten resin 2
During the injection, the protruding wall 34 is deformed by receiving a strong clamping force and comes into close contact with the mold 4. As a result, the screw hole 3 of the nut 3
1 is held in a closed state, so that the molten resin 2
Is completely prevented from flowing into the screw hole 31. Therefore, unlike the above-described conventional case, the thread of the female screw 32 is not crushed by the solidified inflow resin 21. Further, it is possible to prevent a problem that the molded resin member 1 becomes a defective product without causing any inconvenience in screwing in the screws at the time of assembly.
【００１２】なお、上述の本発明の実施の形態では、ネ
ジ孔が貫通した金属のナットの場合を例示して説明した
が、ナットの溶融温度が成形用の樹脂より高い材質であ
れば樹脂材や非金属でもよく、袋ナットのようにネジ孔
が非貫通のナットを樹脂に埋没させた場合等にも本発明
を適用することができる。また、突出壁は断面が鋸歯状
や円弧状等でもよく、突出壁の先端は尖角状に形成する
ことが望ましい。In the above-described embodiment of the present invention, the case of a metal nut having a screw hole penetrated has been described as an example. However, if the nut has a melting temperature higher than that of the molding resin, a resin material may be used. The present invention can also be applied to a case where a nut whose screw hole is not penetrated such as a cap nut is buried in a resin or the like. The protruding wall may have a serrated or arcuate cross section, and the tip of the protruding wall is desirably formed in a pointed shape.
【００１３】[0013]
【発明の効果】本発明は、樹脂成形用の金型にナットを
セットしてナットの端面を露出させて樹脂成形する樹脂
成形品用インサートナットにおいて、ナットの端面に成
形用の型に接触してネジ孔の周辺を囲む突出壁を形成し
た樹脂成形品用インサートナットを構成した。また、上
記において、突出壁の先端を尖角状に形成した樹脂成形
品用インサートナットを構成した。また、本発明はキャ
ビティ型とコア型とよりなる樹脂成形用の型にナットを
セットしてナットの端面を露出させて樹脂成形する樹脂
成形品用インサートナットにおいて、ナットの端面に、
キャビティ型およびコア型の両方に接触してネジ孔の周
辺を囲む突出壁を形成した樹脂成形品用インサートナッ
トを構成した。さらに、上記において、突出壁の先端を
尖角状に形成した樹脂成形品用インサートナットを構成
した。According to the present invention, there is provided an insert nut for a resin molded product in which a nut is set in a resin molding die and the end face of the nut is exposed to form a resin. Thus, an insert nut for a resin molded product having a protruding wall surrounding the periphery of the screw hole was formed. Further, in the above, an insert nut for a resin molded product in which the tip of the protruding wall is formed in a pointed shape is configured. Further, the present invention is an insert nut for a resin molded product in which a nut is set in a mold for resin molding composed of a cavity mold and a core mold to expose the end face of the nut and perform resin molding,
An insert nut for a resin molded product was formed in which a protruding wall surrounding the periphery of the screw hole was formed in contact with both the cavity mold and the core mold. Further, in the above, an insert nut for a resin molded product in which the tip of the protruding wall is formed in a pointed shape is configured.
【００１４】この結果、簡単に構成で従来のように固化
した流入樹脂２１で雌ネジ３２のネジ山が潰されたり、
組立時のネジの螺入に不都合が生じるようなこともなく
なり、成形した樹脂部材１が不良品になるような問題を
完全に防止することが可能になる。As a result, the thread of the female screw 32 is crushed by the inflow resin 21 which has a simple structure and is solidified as in the prior art.
Inconvenience in screwing in the screws at the time of assembly does not occur, and it is possible to completely prevent the problem that the molded resin member 1 becomes defective.
【００１５】よって、本発明によれば、簡単な加工を加
えるだけで溶融樹脂のネジ孔への流入を防止して、歩留
まりのよい樹脂部材を成形できる樹脂成形品用インサー
トナットを提供することができる。Therefore, according to the present invention, it is possible to provide an insert nut for a resin molded product which can prevent a molten resin from flowing into a screw hole by simply applying a simple process and can form a resin member having a high yield. it can.
【図１】図１は本発明方法の成形状態を示す断面図であ
る。FIG. 1 is a sectional view showing a molding state of the method of the present invention.
【図２】本発明の成形動作を示す断面図である。FIG. 2 is a cross-sectional view showing a molding operation of the present invention.
【図３】従来のインサートナットの構成を示す断面図で
ある。FIG. 3 is a cross-sectional view showing a configuration of a conventional insert nut.
１ 樹脂部材 ２ 合成樹脂 ３ インサートナット（ナット） ４ 金型 ２１ 流入樹脂 ３１ ネジ孔 ３２ 雌ネジ ３３ 面取り ３４ 突出壁 ３５ 端面 ４１ コア型 ４２ キャビティ型 ４３ ゲート DESCRIPTION OF SYMBOLS 1 Resin member 2 Synthetic resin 3 Insert nut (nut) 4 Die 21 Inflow resin 31 Screw hole 32 Female screw 33 Chamfer 34 Projection wall 35 End face 41 Core mold 42 Cavity mold 43 Gate
Claims (4)
該ナットの端面を露出させて樹脂成形する樹脂成形品用
インサートナットにおいて、 前記ナットの端面に前記成形用の型に接触してネジ孔の
周辺を囲む突出壁を形成したことを特徴とする樹脂成形
品用インサートナット。1. An insert nut for a resin molded product for setting a nut in a resin molding die and exposing an end face of the nut to perform resin molding, wherein an end face of the nut is brought into contact with the molding die. An insert nut for a resin molded product, wherein a protruding wall surrounding a screw hole is formed.
とを特徴とする請求項１記載の樹脂成形品用インサート
ナット。2. The insert nut for a resin molded product according to claim 1, wherein a tip of said projecting wall is formed in a pointed shape.
形用の型にナットをセットして該ナットの端面を露出さ
せて樹脂成形する樹脂成形品用インサートナットにおい
て、 前記ナットの端面に、前記キャビティ型およびコア型の
両方に接触してネジ孔の周辺を囲む突出壁を形成したこ
とを特徴とする樹脂成形品用インサートナット。3. An insert nut for a resin molded product, wherein a nut is set in a resin molding die composed of a cavity mold and a core mold, and an end face of the nut is exposed to perform resin molding. An insert nut for a resin molded product, wherein a protruding wall surrounding a screw hole is formed in contact with both a cavity mold and a core mold.
とを特徴とする請求項３記載の樹脂成形品用インサート
ナット。4. The insert nut for a resin molded product according to claim 3, wherein a tip of said projecting wall is formed in a pointed shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001031818A JP2002234047A (en) | 2001-02-08 | 2001-02-08 | Insert nut for resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001031818A JP2002234047A (en) | 2001-02-08 | 2001-02-08 | Insert nut for resin molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002234047A true JP2002234047A (en) | 2002-08-20 |
Family
ID=18895843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001031818A Pending JP2002234047A (en) | 2001-02-08 | 2001-02-08 | Insert nut for resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002234047A (en) |
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| WO2008126505A1 (en) * | 2007-04-06 | 2008-10-23 | Nippon Sheet Glass Company, Limited | Glass with molding and method of producing the same |
| JP2009088913A (en) * | 2007-09-28 | 2009-04-23 | Soshin Electric Co Ltd | Noise filter |
| JP2011161757A (en) * | 2010-02-09 | 2011-08-25 | Kyb Co Ltd | Protective cap and method for manufacturing the same |
| KR101170239B1 (en) * | 2007-12-27 | 2012-07-31 | 미쓰비시덴키 가부시키가이샤 | Bearing device for rotary motor |
| JP2012228844A (en) * | 2011-04-27 | 2012-11-22 | Bollhoff Otalu Sa | Insert with screw which is to be insert-molded, and method of insert-molding |
-
2001
- 2001-02-08 JP JP2001031818A patent/JP2002234047A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008126505A1 (en) * | 2007-04-06 | 2008-10-23 | Nippon Sheet Glass Company, Limited | Glass with molding and method of producing the same |
| JP2008273501A (en) * | 2007-04-06 | 2008-11-13 | Nippon Sheet Glass Co Ltd | Glass with molding and its manufacturing method |
| JP2009088913A (en) * | 2007-09-28 | 2009-04-23 | Soshin Electric Co Ltd | Noise filter |
| KR101170239B1 (en) * | 2007-12-27 | 2012-07-31 | 미쓰비시덴키 가부시키가이샤 | Bearing device for rotary motor |
| JP2011161757A (en) * | 2010-02-09 | 2011-08-25 | Kyb Co Ltd | Protective cap and method for manufacturing the same |
| JP2012228844A (en) * | 2011-04-27 | 2012-11-22 | Bollhoff Otalu Sa | Insert with screw which is to be insert-molded, and method of insert-molding |
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