JPH0628856B2 - Nut insert molding method - Google Patents
Nut insert molding methodInfo
- Publication number
- JPH0628856B2 JPH0628856B2 JP63310449A JP31044988A JPH0628856B2 JP H0628856 B2 JPH0628856 B2 JP H0628856B2 JP 63310449 A JP63310449 A JP 63310449A JP 31044988 A JP31044988 A JP 31044988A JP H0628856 B2 JPH0628856 B2 JP H0628856B2
- Authority
- JP
- Japan
- Prior art keywords
- nut
- molding
- insert
- mold
- nest
- 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.)
- Expired - Lifetime
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は合成樹脂部材にナットを埋め込み固定するナッ
トインサート方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a nut insert method for embedding and fixing a nut in a synthetic resin member.
（従来技術とその問題点） 合成樹脂部材と他の部材とを結合するために、異種の材
料からなる金具例えばナットを装着する必要がある場合
がある。例えば、近年、第５図および第６図に示すよう
に、オープン形式の自動車ボディＢに後窓Ｗを装着する
ルーフＲを取り替え可能に装着することが提案され、か
かるハードトップルーフＲのバックピラーＰにボディＢ
への装着用ロック装着Ｍを固定するため、合成樹脂部材
からなるルーフＲのピラーインナーＩにナットＮを固定
する必要がある。(Prior art and its problems) In order to connect a synthetic resin member and another member, it may be necessary to attach a metal fitting, such as a nut, made of different materials. For example, in recent years, as shown in FIGS. 5 and 6, it has been proposed to replaceably mount a roof R to which a rear window W is attached to an open-type automobile body B. The back pillar of such a hard top roof R is proposed. Body B on P
In order to fix the mounting lock mounting M to the, it is necessary to fix the nut N to the pillar inner I of the roof R made of a synthetic resin member.
従来、合成樹脂部材へのナットの固定には、第７図に示
すように、合成樹脂部材Ｐに後加工で、ボルト穴Ｈを開
け、合成樹脂部材Ｐの裏面にナットの付いた補強鉄板Ｆ
を接着剤ＡとリベットＬにて取り付けていた。しかしな
がら、後作業による取付は作業性が悪いとともに、取付
部の外観性を害し、取付精度が悪いという欠点がある。
そこで、合成樹脂部材の成形において成形と同時にナッ
トを埋め込み固定するナットインサート方法の採用が望
まれ、実開昭５３−４８１５７号および特開平１−２７
２４１９号が提案されている。ところが、かかるナット
インサート方法では成形時の型キャビティにナットを固
定するに型表面にくぼみまたは突起を形成し、それにナ
ットを係合固定すると、ナットの固定が確実な場合、成
形後型から製品を取り外すのが困難である一方、軽く係
合させると、型合わせ時に外れて型間に噛み込んだり、
製品に欠陥を生じたりする。また、成形後の型抜きの関
係からネジ孔を立てる方向が型抜き方向に制限される
が、近年、湾曲した成形体にナットインサートを行う必
要が生じており、面直角にネジ孔を立てると型抜き方向
と一致しないという場合がある。さらに、近年、ロボッ
トを使用して成形の自動化を図る傾向にあるが、多数の
ナットを一個一個係合装着する方法はロボットによる自
動化にはなじまないという欠点がある。Conventionally, for fixing a nut to a synthetic resin member, as shown in FIG. 7, a bolt hole H is made in the synthetic resin member P by post-processing, and a reinforcing iron plate F having a nut on the back surface of the synthetic resin member P.
Was attached with adhesive A and rivets L. However, the mounting by the post-work has a drawback that the workability is poor, the appearance of the mounting portion is impaired, and the mounting accuracy is poor.
Therefore, in molding a synthetic resin member, it is desired to adopt a nut insert method in which a nut is embedded and fixed simultaneously with molding.
No. 2419 has been proposed. However, in such a nut insert method, when the nut is fixed in the mold cavity at the time of molding, a recess or protrusion is formed on the mold surface, and when the nut is engaged and fixed to the mold cavity, if the nut is securely fixed, the product from the mold after molding is removed. While it is difficult to remove, if it is lightly engaged, it will come off during mold matching and get caught between molds,
The product may be defective. In addition, the direction in which the screw holes are formed is limited to the mold cutting direction due to the relationship of die cutting after molding, but in recent years, it has become necessary to perform nut insertion on a curved molded body. In some cases, it does not match the die cutting direction. Further, in recent years, there is a tendency to automate the molding using a robot, but the method of engaging and mounting a large number of nuts one by one is not suitable for automation by a robot.
（発明の目的） 本発明は成形型の型抜き方向に限定されることなく、合
成樹脂部材に対してナットを確実に砥粒することができ
るとともに取り外しが容易で、また、ロボットによる自
動化が容易な成形方法を提供することを目的とする。(Object of the Invention) The present invention is not limited to the die cutting direction of the molding die, the nut can be reliably abraded to the synthetic resin member, and can be easily removed, and the automation by the robot is easy. The object of the present invention is to provide a simple molding method.
（課題解決のための手段） 本発明はナットインサート部にすり鉢状の周壁を有する
入れ子とこれと嵌合して装填できるキャビティを有する
型を用意し、該入れ子に予めナットをボルトにて仮止め
した入れ子組立体を利用すれば、上記課題が解決できる
ことに着目してなされたもので、 合成樹脂部材の成形と同時にナットを埋め込み固定する
にあたり、 すり鉢状の周壁を有する入れ子を用意し、その表面側に
対しナットを裏面からのボルト締めにて仮止めしてなる
入れ子組立体を下型の上記入れ子周壁に相応する壁面を
有する凹所に樹脂が侵入しないように嵌合し、 該下型に対し上型を型合わせした両型間に未硬化合成樹
脂を加圧充填してナット周囲を囲み、 硬化後離型して上記ボルト締めを解除し、成形樹脂部材
と入れ子とを分離する工程からなることを要旨とする合
成樹脂部材へのナットインサート成形方法にある。(Means for Solving the Problem) According to the present invention, a mold having a nest having a mortar-shaped peripheral wall in a nut insert part and a mold having a cavity that can be fitted and loaded into the nest is prepared, and the nut is temporarily temporarily fixed to the nest with a bolt. This was done with the focus on being able to solve the above-mentioned problems by using the above-mentioned nesting assembly.When the nut is embedded and fixed at the same time as the molding of the synthetic resin member, a nesting having a mortar-shaped peripheral wall is prepared and its surface is prepared. The nut assembly is temporarily fixed to the side by tightening bolts from the back side, and is fitted so that resin does not enter into the recess having the wall surface corresponding to the peripheral wall of the lower mold. On the other hand, uncured synthetic resin is filled under pressure between both molds, which are matched with each other, to surround the nut. After hardening, the mold is released to release the bolts and separate the molded resin member from the insert. The nut insert molding method to the synthetic resin member to subject matter in that it consists of a certain.
本方法を自動車のハードトップルーフに適用するにはＳ
ＭＣ（シートモールドコンパウンド）法が採用される
が、ＢＭＣ（バルクモールドコンパウンド）法および射
出成形法等の合成樹脂製品の種々の加圧成形方法に採用
されてよい。To apply this method to a car's hardtop roof S
Although the MC (sheet mold compound) method is adopted, it may be adopted in various pressure molding methods for synthetic resin products such as BMC (bulk mold compound) method and injection molding method.
本発明で使用する入れ子は型凹所、即ち型キャビティ内
で、所定箇所にナットを保持する部材を意味し、その表
面側にナットを配置するため、所定の収納凹部がナット
装着個数に応じてナット装着位置に対応して形成され
る。該収納凹部は型合わせ時にナット周囲における材料
流れが阻害されないように逆円錐台形状に形成するのが
好ましい。他方、上記収納凹部に対応して入れ子の裏面
にはナット仮止め用ボルト装着凹部を形成し、その表裏
凹部にはボルト挿通穴が貫通することになる。The nest used in the present invention means a member that holds a nut at a predetermined position in a mold recess, that is, a mold cavity.Because the nut is arranged on the surface side of the mold recess, a predetermined storage recess is formed depending on the number of mounted nuts. It is formed corresponding to the nut mounting position. The housing recess is preferably formed in an inverted truncated cone shape so that the material flow around the nut is not hindered during mold matching. On the other hand, a nut mounting bolt mounting recess is formed on the back surface of the insert corresponding to the storage recess, and a bolt insertion hole penetrates through the front and back recesses.
本発明で用いる入れ子は単一のナットをそれぞれ間隔を
おいて配設する場合はもちろん、連結した合体形の結合
ナットも組み込むことができる。The insert used in the present invention can incorporate not only single nuts arranged at intervals but also a combined and integrated type coupling nut.
本発明におけるナットの入れ子へのボルト締めによる仮
止め形態には入れ子表面のナット外に突出せずナット穴
内に嵌入されて、ナットを確実に固定することができる
形態を含み、ナットに螺合する形態のボルトに代えて使
用することができるが、固定および取り外しの容易性、
確実性の点からナットに螺合可能なボルトを使用するの
が好ましい。The temporary fixing form by bolting the nut to the insert in the present invention includes a form in which the nut on the insert surface does not protrude outside the nut and is fitted into the nut hole to securely fix the nut, and the nut is screwed into the nut. Although it can be used in place of the form bolt, it is easy to fix and remove,
From the viewpoint of reliability, it is preferable to use a bolt that can be screwed into the nut.
以下、本発明を添付図面に示す具体例に基づき、詳細に
説明する。Hereinafter, the present invention will be described in detail based on specific examples shown in the accompanying drawings.
（実施例） 第１図は本発明をＳＭＣ法によるバックピラーインナー
の成形に適用した場合のナットインサート成形方法の工
程図で、(a)まず、入れ子１の表面にナット２を裏面か
ら穴１３を介して突出するボルト３に螺合させ、固定
し、シリコンキャップ４にてナット２の頭部開口２１を
封鎖する。(Embodiment) FIG. 1 is a process diagram of a nut insert molding method when the present invention is applied to molding of a back pillar inner by the SMC method. (A) First, the nut 2 is formed on the front surface of the insert 1 from the rear surface to the hole 13 The head opening 21 of the nut 2 is closed with a silicon cap 4 by screwing it onto a bolt 3 projecting through.
上記入れ子１はすり鉢状の周壁を有し、その表面側にナ
ット２を固定するため、所定の逆円錐台形状の収納凹部
１１がナット装着個数に応じてナット装着位置に対応し
て形成される。他方、上記収納凹部１１に対応して入れ
子１の裏面にはナット仮止め用ボルト３の装着凹部１２
を形成し、その表裏凹部１１、１２にはボルト挿通穴１
３が貫通することになる。本発明で用いる入れ子は単一
のナットをそれぞれ間隔をおいて配設する場合はもちろ
ん、連結した合体形の結合ナットも組み込むことができ
る。The insert 1 has a mortar-shaped peripheral wall, and the nut 2 is fixed to the surface side thereof, so that a predetermined inverted frustoconical storage recess 11 is formed corresponding to the number of nut mounting positions. . On the other hand, a recess 12 for mounting the nut temporary fixing bolt 3 is provided on the back surface of the insert 1 in correspondence with the storage recess 11.
And the bolt insertion holes 1 are formed in the front and back recesses 11 and 12, respectively.
3 will penetrate. The insert used in the present invention can incorporate not only single nuts arranged at intervals but also a combined and integrated type coupling nut.
上記ナット２は第２図に示すように、内ネジを螺設した
円筒本体２０の中央部にロボット爪が係合する一対の外
周溝２３、２３により挟まれた円周フランジ２２を形成
して熱伝達を向上させるとともに、基本肉厚部との樹脂
容量の変化を極力抑え、ナットインサートによりナット
周囲近傍の成形サイクルが長くなるのを防止する一方、
その一部を切り欠き、インサート後の回り止めを行うよ
うになっている。As shown in FIG. 2, the nut 2 has a cylindrical main body 20 screwed with an internal screw, and a circumferential flange 22 sandwiched by a pair of outer circumferential grooves 23, 23 into which a robot claw engages, which is formed in the central portion of the cylindrical main body 20. While improving heat transfer, suppressing the change in resin capacity with the basic thick part as much as possible and preventing the molding cycle near the nut from becoming longer with the nut insert,
A part of it is cut out to prevent rotation after insertion.
(b)上記入れ子組立体Ｍを下型５の凹部５１にセットす
るが、入れ子組立体Ｍの装着を確実にするために凹部５
１は入れ子１のすり鉢状の周囲に沿う傾斜面５２、５２
と入れ子１の底部と当接する底面５３とで断面逆台形状
に形成されている。他方、上型６には入れ子１の表面に
固定されたナット２の頭部に対応してナット外径よりや
や大きい半球状凹部６１が形成されている。(b) The nesting assembly M is set in the recessed portion 51 of the lower die 5, but the recessed portion 5 is formed in order to ensure the mounting of the nesting assembly M.
1 is a sloping surface 52, 52 along the mortar-shaped periphery of the nest 1.
And a bottom surface 53 that abuts the bottom of the insert 1 are formed in an inverted trapezoidal cross section. On the other hand, the upper mold 6 is formed with a hemispherical concave portion 61 corresponding to the head of the nut 2 fixed to the surface of the insert 1 and slightly larger than the nut outer diameter.
(c)そのため、下型５と上型６とを型合わせし、未硬化
樹脂Ｗを圧縮成形すると、ナット２の周辺は両側から樹
脂がスムーズに流れるとともに（第３図(a)参照）、ナ
ット頭部の上型凹部６１を介してナット背後のショート
またはウエルドの発生しやすい部分に上方からの樹脂流
れを送ることになる（第３図(b)参照）。しかも、ナッ
トインサート部分は製品肉厚よりもおおきくなるが、中
央フランジ２２が張り出しているので（第４図参照）、
周囲の熱伝達を向上させるとともに、基本肉厚部との樹
脂容量の変化を極力抑えるので、ナット周囲近傍の成形
サイクルが長くなるのが防止される。(c) Therefore, when the lower die 5 and the upper die 6 are matched with each other and the uncured resin W is compression-molded, the resin smoothly flows from both sides around the nut 2 (see FIG. 3 (a)). The resin flow from above is sent to the portion behind the nut where the short or weld is likely to occur via the upper mold recess 61 of the nut head (see FIG. 3 (b)). Moreover, the nut insert portion is larger than the product thickness, but the central flange 22 is overhanging (see FIG. 4).
Since the heat transfer to the surroundings is improved and the change in the resin capacity with the basic thick portion is suppressed as much as possible, it is possible to prevent the molding cycle in the vicinity of the nut from being lengthened.
(d)樹脂の硬化後、入れ子組立体Ｍごと成形製品７を脱
型し、 (e)仮止めボルト３を外して入れ子１を外す一方、ナッ
トインサート部分から突出する凸部７１をグラインダ等
で研削する。(d) After the resin is cured, the molded product 7 is released from the mold together with the insert assembly M, (e) the temporary fixing bolt 3 is removed to remove the insert 1, and the convex portion 71 protruding from the nut insert portion is grinded with a grinder or the like. Grind.
(f)その後、シリコンキャップ４をそのままにして塗装
Ｃを施し、 (g)シリコンキャップ４をナット２の頭部から外し、ナ
ットのインサート成形を完了する。(f) After that, the coating C is applied with the silicon cap 4 as it is, and (g) the silicon cap 4 is removed from the head of the nut 2, and the insert molding of the nut is completed.
（発明の効果） 以上の説明で明らかなように、本発明によれば、合成樹
脂部材の成形と同時にナットを埋め込み固定するにあた
り、すり鉢状の周壁を有する入れ子を利用してナットを
予め固定した入れ子組立体を形成し、ナットインサート
部分に嵌合するので、入れ子組立体の裏側に位置するナ
ットを固定する部材が樹脂により固定されることはな
く、型表面に凹部または凸部を設けるナット装着方法に
比してナットの取り付け取り外しが容易である。また、
入れ子の周壁がすり鉢形状をなすので、型開き方向をナ
ット孔の指向方向に一致させる必要がない。ＳＭＣ成形
において、平坦でない成型物を成形しようとする場合型
押し方向は樹脂の流れを考慮して決定されるため、面直
角にナット孔方向と必ずしも一致しない。本発明方法は
これを実現することができるものである。(Effects of the Invention) As is apparent from the above description, according to the present invention, when the nut is embedded and fixed at the same time as the molding of the synthetic resin member, the nut is previously fixed using the nest having the mortar-shaped peripheral wall. Since the nesting assembly is formed and fits into the nut insert part, the member for fixing the nut located on the back side of the nesting assembly is not fixed by the resin, but a concave or convex portion is provided on the mold surface. It is easier to attach and detach the nut compared to the method. Also,
Since the peripheral wall of the nest has a mortar shape, it is not necessary to match the mold opening direction with the direction of the nut hole. In SMC molding, when a molded product that is not flat is to be molded, the mold pressing direction is determined in consideration of the resin flow, and therefore does not necessarily coincide with the nut hole direction at a right angle to the surface. The method of the present invention can achieve this.
さらに、組立体を下型に装着すれば、ナットの型装着が
完了するので、ロボットを使用してのナットインサート
成形の自動化が容易である。Further, when the assembly is mounted on the lower mold, the mounting of the nut on the mold is completed, and automation of nut insert molding using a robot is easy.
第１図(a)〜(g)は本発明をＳＭＣ法によるバックピラー
インナーの成形に適用した場合のナットインサート成形
方法の工程図、第２図(a)(b)は本発明方法によってイン
サートされるナットの半断面側面図および平面図、第３
図(a)(b)は本発明成形法における樹脂流れを示す平面図
および側面図、第４図はナットインサート部分の圧縮成
形状態を示す断面図、第５図はインサート成形を必要と
する具体例の概要側面図、第６図はそのVI−VI線断面
図、第７図は従来のナット固定方法を示す構造図であ
る。 １……入れ子、２……ナット、３……仮止めボルト、４
……シリコンキャップ、５……下型、６……上型。1 (a) to (g) are process diagrams of a nut insert molding method when the present invention is applied to molding of a back pillar inner by the SMC method, and FIGS. 2 (a) and (b) are inserts according to the method of the present invention. Sectional side view and plan view of a nut to be used, third
FIGS. (A) and (b) are a plan view and a side view showing a resin flow in the molding method of the present invention, FIG. 4 is a sectional view showing a compression molding state of a nut insert portion, and FIG. An outline side view of an example, FIG. 6 is a sectional view taken along the line VI-VI, and FIG. 7 is a structural view showing a conventional nut fixing method. 1 ... Nest, 2 ... Nut, 3 ... Temporary fixing bolt, 4
...... Silicon cap, 5 ...... Lower mold, 6 ...... Upper mold.
Claims (1)
込み固定するにあたり、 すり鉢状の周壁を有する入れ子を用意し、その表面側に
対しナットを裏面からのボルト締めにて仮止めしてなる
入れ子組立体を下型の上記入れ子周壁に相応する壁面を
有する凹所に樹脂が侵入しないように嵌合し、 該下型に対し上型を型合わせした両型間に未硬化合成樹
脂を加圧充填してナット周囲を囲み、 硬化後離型して上記ボルト締めを解除し、成形樹脂部材
と入れ子とを分離する工程からなることを特徴とするナ
ットインサート成形方法。1. A nest formed by preparing a nest having a mortar-shaped peripheral wall when embedding and fixing a nut at the same time when molding a synthetic resin member, and temporarily fastening the nut to the front side by bolting from the back side. The assembly is fitted into a recess having a wall surface corresponding to the nest peripheral wall of the lower mold so that the resin does not enter, and the uncured synthetic resin is pressed between both molds in which the upper mold is matched with the lower mold. A nut insert molding method comprising a step of filling and enclosing the periphery of the nut, releasing after curing, releasing the bolt tightening, and separating the molding resin member and the nest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63310449A JPH0628856B2 (en) | 1988-12-08 | 1988-12-08 | Nut insert molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63310449A JPH0628856B2 (en) | 1988-12-08 | 1988-12-08 | Nut insert molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02155618A JPH02155618A (en) | 1990-06-14 |
| JPH0628856B2 true JPH0628856B2 (en) | 1994-04-20 |
Family
ID=18005385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63310449A Expired - Lifetime JPH0628856B2 (en) | 1988-12-08 | 1988-12-08 | Nut insert molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628856B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101284428B1 (en) * | 2006-12-05 | 2013-07-09 | 두산인프라코어 주식회사 | Insert for plastic pannel of heavy machine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2518113B2 (en) * | 1991-05-28 | 1996-07-24 | 豊田合成株式会社 | Manufacturing method of molded product with clip |
| US6361099B1 (en) * | 1999-06-25 | 2002-03-26 | Collins & Aikman Products Co | Vehicle floor covering with integral threaded drain tube and method of making same |
| KR20020039889A (en) * | 2000-11-22 | 2002-05-30 | 윤건구 | Bolting Part Manufacturing Method Of An Amusement Apparatus |
| JP5826718B2 (en) * | 2012-06-27 | 2015-12-02 | アイコトレーディング 株式会社 | Injection molding method for molded product having insert member |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348157U (en) * | 1976-09-29 | 1978-04-24 | ||
| JPH01272419A (en) * | 1988-04-26 | 1989-10-31 | Inoue Mtp Co Ltd | Manufacture of molded product having nut embedded therein |
-
1988
- 1988-12-08 JP JP63310449A patent/JPH0628856B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101284428B1 (en) * | 2006-12-05 | 2013-07-09 | 두산인프라코어 주식회사 | Insert for plastic pannel of heavy machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02155618A (en) | 1990-06-14 |
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