JP2001225352A - Method for manufacturing metal insert resin composite molded article - Google Patents
Method for manufacturing metal insert resin composite molded articleInfo
- Publication number
- JP2001225352A JP2001225352A JP2000347891A JP2000347891A JP2001225352A JP 2001225352 A JP2001225352 A JP 2001225352A JP 2000347891 A JP2000347891 A JP 2000347891A JP 2000347891 A JP2000347891 A JP 2000347891A JP 2001225352 A JP2001225352 A JP 2001225352A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- composite molded
- metal
- molded article
- resin composite
- 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
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/02—Aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/10—Copper
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- ing And Chemical Polishing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属部品がインサ
ートされた樹脂複合成形品の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a resin composite molded product in which a metal component is inserted.
【０００２】[0002]
【従来の技術】電気・自動車分野を中心に、幅広い産業
分野で金属部品をインサート成形した樹脂複合成形部品
が使用されている。このような樹脂複合成形部品は種々
あり、金属部品をインサートする目的も製品の機能・用
途などによっても異なるが、例えば、自動車に使用され
るスピードセンサー等の各種センサー部品や家電製品等
に使用されるボタン式スイッチ部品などが挙げられる。
前者の例では、一般的に巻き線したコイルボビンなどと
共に金属端子を射出成形用金型にインサートし、樹脂で
一体成形される。このとき、金属端子は成形品の内・外
部とを電気的に接続する働きがあるため、金属端子の一
部は樹脂成形品表面から露出するように成形される。周
知のように自動車部品は過酷な環境下で使用され、特に
電気・電子部品は水分や湿気などの影響を受け易いた
め、それらが容易に内部に侵入しないようにする必要が
ある。しかしながら、金属と樹脂は一般的に接着が困難
であり、特に熱可塑性樹脂を用いた金属のインサート成
形では、金属・樹脂間の接着性は殆ど得られず、金属と
樹脂との界面を通して水分や湿気が容易に内部に侵入し
てしまう。このため、従来から、金属端子と樹脂の境界
部に後加工で熱硬化性接着剤を塗布したり、ゴム状のプ
ロテクト部品を組み付けてシールするなどの対策手段が
取られてきた。2. Description of the Related Art Resin composite parts obtained by insert molding of metal parts are used in a wide variety of industrial fields, mainly in the fields of electrics and automobiles. There are various types of such resin composite molded parts, and the purpose of inserting a metal part also differs depending on the function and use of the product, but for example, it is used for various sensor parts such as a speed sensor used in automobiles and home electric appliances. Button type switch parts.
In the former example, generally, a metal terminal is inserted into a metal mold for injection molding together with a wound coil bobbin and the like, and is integrally molded with resin. At this time, since the metal terminal has a function of electrically connecting the inside and the outside of the molded product, a part of the metal terminal is molded so as to be exposed from the surface of the resin molded product. As is well known, automobile parts are used in a harsh environment, and in particular, electric and electronic parts are susceptible to moisture and moisture, so that it is necessary to prevent them from easily entering the inside. However, it is generally difficult to bond a metal and a resin. In particular, in metal insert molding using a thermoplastic resin, almost no adhesion between the metal and the resin is obtained, and moisture and water are not easily absorbed through the interface between the metal and the resin. Moisture easily enters the interior. For this reason, conventionally, countermeasures such as applying a thermosetting adhesive to the boundary portion between the metal terminal and the resin by post-processing, or assembling and sealing a rubber-like protected component have been taken.
【０００３】一方、後者の例では、フープ状の銅製リー
ドフレームを射出成形用金型に順送しインサートし、樹
脂で連続一体成形される。次に、外部露出した端子部の
曲げ加工、トリミング、組立て等が順次行われ、完成し
たスイッチ部品は最終的にプリント回路基板等にハンダ
付けされ、家電製品等の一部を構成することになる。こ
のようなスイッチ部品の製造過程における問題点の一つ
に、ハンダ付け工程でのフラックスのスイッチ内部侵入
がある。即ち、ハンダの付着性向上剤として事前に金属
端子部に塗布されたハンダフラックスが、ハンダ時の熱
で低粘度化し、その一部が金属と樹脂の界面を伝わって
スイッチ内部接点を汚染して電気的接触不良を生じるこ
とがある。このため、従来は端子の付け根部分にフッ素
系撥水剤等を予め塗布した上でハンダ付けを行なうこと
で、フラックスの侵入防止を図っていた。On the other hand, in the latter example, a hoop-shaped copper lead frame is sequentially fed into an injection molding die, inserted, and continuously and integrally molded with resin. Next, bending, trimming, assembling, and the like of the externally exposed terminal portion are sequentially performed, and the completed switch component is finally soldered to a printed circuit board or the like, thereby constituting a part of a home appliance or the like. . One of the problems in the process of manufacturing such a switch component is that flux enters the switch during the soldering process. In other words, the solder flux previously applied to the metal terminals as a solder adhesion improver reduces the viscosity due to the heat during soldering, and a part of the flux conveys the interface between the metal and the resin and contaminates the internal contacts of the switch. Poor electrical contact may occur. For this reason, conventionally, flux penetration has been prevented by applying a fluorine-based water repellent or the like to the base of the terminal in advance and then soldering.
【０００４】[0004]
【発明が解決しようとする課題】上記の例に共通する問
題点は、水分や湿気等の外的影響から部品内部の電気回
路や電気接点等を保護するために、部品の組立て工程の
中で二次的加工やシール部材等の保護部品の取付けが必
要な点であり、生産工程を煩雑化して製品のコストアッ
プの要因になっていた。この問題の根本原因は、元来、
熱可塑性樹脂とインサートに用いる銅などの金属との間
に強い化学的相互作用（化学結合等）を得ることは困難
であるという点にあり、従って単に射出成形金型内に熱
溶融した樹脂を流し込んでインサート金属を被覆して
も、成形品の冷却過程やその後の使用環境変化の中で樹
脂／金属界面に極めて微細な隙間が生じてしまうことを
防ぐことは実質上困難であった。A problem common to the above-mentioned examples is that, in order to protect an electric circuit and an electric contact inside the part from external influences such as moisture and humidity, the parts are not easily assembled during the assembly process. This requires secondary processing and the attachment of protective parts such as seal members, which complicates the production process and increases the cost of products. The root cause of this problem was originally
It is difficult to obtain a strong chemical interaction (chemical bonding, etc.) between the thermoplastic resin and the metal such as copper used for the insert. Even if it is poured and coated with an insert metal, it has been substantially difficult to prevent the formation of extremely fine gaps at the resin / metal interface during the cooling process of the molded article and subsequent changes in the use environment.
【０００５】そこで本発明の目的は、製造が容易で、か
つ過酷な環境変化の中でも部品内部の電気回路や電気接
点等を保護するのに充分な気密性を確保できる、金属イ
ンサート樹脂複合成形品を安価に製造する方法を提供す
ることにある。Accordingly, an object of the present invention is to provide a metal insert resin composite molded product which is easy to manufacture and which can secure sufficient airtightness for protecting electric circuits and electric contacts inside components even under severe environmental changes. It is an object of the present invention to provide an inexpensive method for producing a.
【０００６】[0006]
【課題を解決するための手段】本発明者は、かかる状況
に鑑み鋭意検討の結果、予め金属部品表面をケミカルエ
ッチングし、次にこの金属部品を射出成形機の金型にイ
ンサートして熱可塑性樹脂材料を用いて射出成形するこ
とにより、初期の気密性確保は勿論のこと、冷熱サイク
ルテスト等の過酷な環境劣化試験後においても高い気密
性を維持する複合成形品が容易に得られることを見出
し、本発明に至った。Means for Solving the Problems The present inventor has made intensive studies in view of such circumstances, and as a result, chemically etches the surface of a metal part in advance, and then inserts the metal part into a mold of an injection molding machine to form a thermoplastic resin. By injection molding using a resin material, it is possible to easily obtain a composite molded product that maintains high airtightness even after severe environmental degradation tests such as a thermal cycle test, as well as ensuring initial airtightness. Heading, and led to the present invention.
【０００７】即ち、本発明は、金属部品がインサートさ
れた樹脂複合成形品を製造する方法であって、予め金属
部品表面をケミカルエッチングし、次にこの金属部品を
射出成形機の金型にインサートして熱可塑性樹脂材料を
用いて射出成形することを特徴とする金属インサート樹
脂複合成形品の製造方法である。That is, the present invention relates to a method of manufacturing a resin composite molded article in which a metal part is inserted, wherein the surface of the metal part is subjected to chemical etching in advance, and then the metal part is inserted into a mold of an injection molding machine. And performing injection molding using a thermoplastic resin material.
【０００８】[0008]
【発明の実施の形態】以下に、本発明の具体的構成につ
いて詳しく述べる。先ず、本発明で使用する金属部品の
表面をケミカルエッチングする方法について説明する。
金属表面を合成化学薬品等を用いてケミカルエッチング
する方法については、金属の種類や処理する目的に応じ
て種々の方法があり、今日様々な産業分野で利用されて
いる。その主な用途分野としては、プリント基板の製造
過程において、銅箔と熱硬化性エポキシ樹脂との接着力
を高めるために行われる銅箔のエッチング処理や、装飾
・防錆等を目的とした金属部品の塗装工程において、金
属素材に対する塗料の密着性を高めるために、塗装前処
理として予め金属表面を微細粗化させる目的で行われる
エッチング処理、等が挙げられる。エッチング方法に関
する具体例を挙げると、前者の分野では、例えば特開平
１０−９６０８８号公報や特開平１０−５６２６３号公
報で公開されているものがある。一方、後者の分野で
は、例えば特開平４−３２５８５号公報や特開平４−３
２５８３号公報で公開されているものがある。本発明に
おいて用いるケミカルエッチングの方法は特に限定され
るものではなく、インサートする金属の材質や形状、要
求性能等に応じて、所望により従来法の何れもが選択で
きる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a specific configuration of the present invention will be described in detail. First, a method for chemically etching the surface of a metal component used in the present invention will be described.
There are various methods for chemical etching of a metal surface using a synthetic chemical or the like, depending on the type of metal and the purpose of the treatment, and are used in various industrial fields today. Its main fields of application are as follows: In the process of manufacturing printed circuit boards, etching of copper foil, which is performed to increase the adhesion between copper foil and thermosetting epoxy resin, and metal for decoration, rust prevention, etc. In the part coating process, in order to enhance the adhesion of the coating material to the metal material, an etching process performed for the purpose of preliminarily roughening the metal surface as a pre-coating process is exemplified. To give a specific example of the etching method, in the former field, there are those disclosed in, for example, JP-A-10-96088 and JP-A-10-56263. On the other hand, in the latter field, for example, JP-A-4-32585 and JP-A-4-3
There is one disclosed in Japanese Patent No. 2583. The chemical etching method used in the present invention is not particularly limited, and any of the conventional methods can be selected as desired according to the material and shape of the metal to be inserted, required performance, and the like.
【０００９】本発明においては、予め上記のような方法
で、ケミカルエッチングした金属インサート部品が用い
られるが、そのインサート部品が電気回路の一部をな
す、例えば電気端子のようなものである場合、インサー
ト金属としては銅、銅合金、アルミニウム、アルミニウ
ム合金等が好適に用いられる。その際、金属インサート
部品の表面は、ケミカルエッチングによる表面粗化を阻
害しない程度に、ケミカルエッチングの前又は／及び後
に、メッキ等により一部又は全部が被覆処理されていて
もかまわない。In the present invention, a metal insert part which has been chemically etched in advance by the above-mentioned method is used. When the insert part forms a part of an electric circuit, for example, an electric terminal, As the insert metal, copper, copper alloy, aluminum, aluminum alloy and the like are preferably used. At this time, the surface of the metal insert component may be partially or entirely coated with plating or the like before and / or after the chemical etching to the extent that surface roughening due to the chemical etching is not hindered.
【００１０】一方、熱可塑性樹脂に関しては、周知の通
り、その成形加工工程で、熱によりポリマーの一部分解
等の挙動を除けば、一般的に架橋等の化学的反応性は殆
ど示さず、且つ冷却過程での収縮挙動等の影響もあり、
ケミカルエッチングした金属部品を熱可塑性樹脂を用い
てインサート成形しても、プリント基板等の分野で利用
されるケミカルエッチングした銅箔と熱硬化性樹脂との
組合せで得られるような密着性改善効果や、金属塗装の
分野で利用されるケミカルエッチングした金属素材に対
する塗料の密着性改善効果、等は殆ど認められず、これ
まで熱可塑性樹脂の金属インサート成形においてケミカ
ルエッチングが利用されることはなかった。にもかかわ
らず、後述する本発明の実施例で示すように、気密性に
関しては著しい改善効果が見出されたことから、熱可塑
性樹脂を用いてケミカルエッチングした金属部品をイン
サート成形した際の良好な気密性発現には、樹脂／金属
界面での密着力以外のメカニズムがあるものと考えられ
る。このメカニズムに関しては、本発明者の研究によれ
ば、金属表面をケミカルエッチングにより微細粗化する
ことで金属の表面積が増大し、即ち金属／樹脂界面の面
積増大により、界面を伝わって気体や液体が部品内部に
侵入する際の圧力伝達損失が大きくなることで、実用上
必要な気密性が確保されるためと推定される。On the other hand, as is well known, thermoplastic resins generally show little chemical reactivity such as cross-linking, except for the behavior such as partial decomposition of the polymer by heat in the molding process. There are also effects such as shrinkage behavior during the cooling process,
Even if the chemically etched metal parts are insert-molded using a thermoplastic resin, the effect of improving the adhesion as obtained by the combination of the chemically etched copper foil and thermosetting resin used in the field of printed circuit boards and the like can be obtained. The effect of improving the adhesion of paint to a chemically etched metal material used in the field of metal coating is hardly recognized, and chemical etching has not been used in metal insert molding of a thermoplastic resin. Nevertheless, as shown in the examples of the present invention described below, a remarkable improvement effect was found with respect to airtightness, so that when a metal part chemically etched using a thermoplastic resin was insert-molded, It is considered that there is a mechanism other than the adhesion at the resin / metal interface in the development of the airtightness. Regarding this mechanism, according to the study of the present inventors, the surface area of the metal is increased by finely roughening the metal surface by chemical etching, that is, by increasing the area of the metal / resin interface, the gas or liquid is transmitted through the interface. This is presumed to be due to the fact that the air-tightness required for practical use is ensured by increasing the pressure transmission loss when the gas enters the inside of the component.
【００１１】次に、本発明で使用する熱可塑性樹脂材料
について説明する。本発明で使用する熱可塑性樹脂と
は、ポリエチレン樹脂、ポリプロピレン樹脂、アクリロ
ニトリル・ブタジエン・スチレン共重合樹脂、ポリ塩化
ビニル樹脂、ポリカーボネート樹脂、ポリアミド樹脂、
ポリアセタール樹脂、ポリブチレンテレフタレート樹
脂、ポリエチレンテレフタレート樹脂、ポリフェニレン
サルファイド樹脂、液晶性ポリエステル樹脂、ポリイミ
ド樹脂、シンジオタクチックポリスチレン樹脂、ポリシ
クロヘキサンジメチレンテレフタレート樹脂等をあげる
ことが出来、更に好ましくは、成形加工が容易で、かつ
電気的・機械的特性に優れるポリアセタール樹脂、ポリ
ブチレンテレフタレート樹脂、ポリエチレンテレフタレ
ート樹脂、ポリフェニレンサルファイド樹脂、ポリアミ
ド樹脂、液晶性ポリエステル樹脂、ポリイミド樹脂、シ
ンジオタクチックポリスチレン樹脂、ポリシクロヘキサ
ンジメチレンテレフタレート樹脂からなる群の中から選
ばれた少なくとも１種以上の樹脂を主成分とする熱可塑
性樹脂が好適に用いられる。Next, the thermoplastic resin material used in the present invention will be described. The thermoplastic resin used in the present invention, polyethylene resin, polypropylene resin, acrylonitrile-butadiene-styrene copolymer resin, polyvinyl chloride resin, polycarbonate resin, polyamide resin,
Polyacetal resin, polybutylene terephthalate resin, polyethylene terephthalate resin, polyphenylene sulfide resin, liquid crystalline polyester resin, polyimide resin, syndiotactic polystyrene resin, polycyclohexane dimethylene terephthalate resin and the like, and more preferably, molding processing Polyacetal resin, polybutylene terephthalate resin, polyethylene terephthalate resin, polyphenylene sulfide resin, polyamide resin, liquid crystalline polyester resin, polyimide resin, syndiotactic polystyrene resin, polycyclohexane dimethylene terephthalate, which is easy and has excellent electrical and mechanical properties Thermoplastic resin containing as a main component at least one resin selected from the group consisting of resins is preferably used. It is.
【００１２】本発明で用いる熱可塑性樹脂材料として
は、上記熱可塑性樹脂に加え、気密性を悪化させない範
囲において、従来公知の各種無機・有機充填剤、難燃
剤、難燃助剤、紫外線吸収剤、熱安定剤、光安定剤、着
色剤、カーボンブラック、加工助剤、核剤、離型剤、可
塑剤等の添加剤を含有せしめたものであっても勿論かま
わない。As the thermoplastic resin material used in the present invention, in addition to the above-mentioned thermoplastic resins, various known inorganic and organic fillers, flame retardants, flame retardant auxiliaries, ultraviolet absorbers as long as airtightness is not deteriorated. Of course, it may contain additives such as a heat stabilizer, a light stabilizer, a colorant, carbon black, a processing aid, a nucleating agent, a release agent, and a plasticizer.
【００１３】次に、上記ケミカルエッチングした金属部
品を上記熱可塑性樹脂材料を用いてインサート成形する
ためには、一般的に射出成形装置が用いられる。本発明
で使用する射出成形装置は特殊なものではなく、一般に
市販されている射出成形機を用いることができる。本発
明における成形方法、成形条件に関して特に制限等はな
いが、インサート成形における一般常識として、溶融樹
脂がインサート金属としっかり接触し、保圧力が十分に
かかるように条件を調整することが望ましい。Next, in order to insert-mold the chemically etched metal part using the thermoplastic resin material, an injection molding apparatus is generally used. The injection molding apparatus used in the present invention is not special, and a commercially available injection molding machine can be used. There is no particular limitation on the molding method and molding conditions in the present invention, but as common general knowledge in insert molding, it is desirable to adjust the conditions so that the molten resin comes into firm contact with the insert metal and a sufficient holding pressure is applied.
【００１４】[0014]
【実施例】以下に本発明の実施例について説明するが、
本発明の主旨を逸脱しない限り、本発明はこれら実施例
に限定されるものではない。EXAMPLES Examples of the present invention will be described below.
The present invention is not limited to these examples unless departing from the gist of the present invention.
【００１５】実施例において、樹脂成形に用いたインサ
ート金属部品の形状を図１に、この金属部品を射出成形
用金型にインサートして熱可塑性樹脂で射出成形するこ
とにより得られた樹脂成形品の形状を図２に示す。ま
た、上記樹脂成形品を使用して行なった気密性評価にお
ける試験装置の概略図を図３に示す。更に、実施例にお
いて、気密性の評価に用いた方法は以下の通りである。 (1) 気密性試験 評価用サンプルとして図２に示す樹脂成形品を使用し、
図３に示す試験装置を用いて気密性の評価を行った。先
ず、評価サンプルのセット方法は、耐圧気密容器の金属
製容器部に樹脂成形品をゴム製Ｏリングを介してセット
し、次に金属製上蓋部で樹脂成形品を挟み込むように固
定する（容器部と上蓋部にはそれぞれ雄雌ネジが切って
あり、これにより固定する）。この耐圧気密容器を水槽
に投入し、所望の圧力に達するまで圧縮エアーバルブを
徐々に開放して耐圧気密容器内の圧力を上げていき、金
属インサート部からのエアー漏れの有無を確認した。所
定の圧力をかけて１分間の静置状態においてエアー漏れ
が無ければ、当該圧力下での気密性はＯＫと判定した。
試験は0.1 MPa から開始し、ＯＫであれば順次0.1MPa
ずつ上げていき、最大0.6 MPa まで試験を行った。初期
状態の気密性試験で0.6 MPa でＯＫであったサンプルに
ついては、次に記す耐ヒートショック性試験を所定サイ
クル行った後、同様に気密性試験を実施した。なお、試
験はn ＝５のサンプルで行った。 (2) 耐ヒートショック性試験 市販のヒートショック試験装置を使用し、（−40℃×２
hr〜150 ℃×２hr）を１サイクルとし、20サイクル毎に
樹脂成形品を槽内から取り出して上記気密性試験を行
い、耐ヒートショック性の評価とした。 実施例１ 図１に示す形状の銅製のインサート部品の表面を、下記
組成のエッチング液Ａ（水溶液）に１分間浸漬して防錆
皮膜除去を行い、次に下記組成のエッチング液Ｂ（水溶
液）に５分間浸漬して金属部品表面をエッチングした。 ・エッチング液Ａ（温度20℃） 過酸化水素 ２６ｇ／Ｌ 硫酸 ９０ｇ／Ｌ ・エッチング液Ｂ（温度25℃） 過酸化水素 ８０ｇ／Ｌ 硫酸 ９０ｇ／Ｌ ベンゾトリアゾール ５ｇ／Ｌ 塩化ナトリウム ０．２ｇ／Ｌ 次に、このインサート部品を射出成形用金型にセット
し、ガラス繊維30重量％（ここで、「重量％」は質量百
分率のことを意味する。以下同じ）及び炭酸カルシウム
30重量％を含有するポリフェニレンサルファイド樹脂を
使用し、表１に示す成形条件にて射出成形を行い、図２
に示す形状の評価用サンプルを得て、上記気密性試験を
行った。結果を表３に示す。 実施例２ 成形用樹脂として、ガラス繊維15重量％及びガラスフレ
ーク15重量％を含有するポリブチレンテレフタレート樹
脂を使用し、表２に示す成形条件にて射出成形を行った
他は、実施例１と同様にして評価用サンプルを作製し、
上記気密性試験を行った。結果を表３に示す。 実施例３ 図１に示す形状のアルミニウム製のインサート部品の表
面を、下記組成のアルカリ脱脂液（水溶液）に５分間浸
漬して脱脂処理を行い、次に下記組成のエッチング液Ｃ
（水溶液）に３分間浸漬して金属部品表面をエッチング
した。 ・アルカリ脱脂液（温度40℃） ＡＳ−１６５Ｆ（荏原ユージライト製） ５０ｍｌ／Ｌ ・エッチング液Ｃ（温度40℃） ＯＦ−９０１（荏原ユージライト製） １２ｇ／Ｌ 水酸化マグネシウム ２５ｇ／Ｌ 次に、このインサート部品を射出成形用金型にセット
し、ガラス繊維30重量％及び炭酸カルシウム30重量％を
含有するポリフェニレンサルファイド樹脂を使用し、表
１に示す成形条件にて射出成形を行い、図２に示す形状
の評価用サンプルを得て、上記気密性試験を行った。結
果を表３に示す。 実施例４ 成形用樹脂として、ガラス繊維15重量％及びガラスフレ
ーク15重量％を含有するポリブチレンテレフタレート樹
脂を使用し、表２に示す成形条件にて射出成形を行った
他は、実施例３と同様にして評価用サンプルを作製し、
上記気密性試験を行った。結果を表３に示す。 比較例１〜２ 銅製のインサート部品をケミカルエッチング処理しなか
った他は、実施例１〜２と同様にして評価用サンプルを
作製し、上記気密性試験を行った。結果を表３に示す。 比較例３〜４ アルミニウム製のインサート部品をケミカルエッチング
処理しなかった他は、実施例３〜４と同様にして評価用
サンプルを作製し、上記気密性試験を行った。結果を表
３に示す。FIG. 1 shows the shape of an insert metal part used in resin molding in an embodiment, and a resin molded article obtained by inserting this metal part into an injection mold and injection molding with a thermoplastic resin. Is shown in FIG. FIG. 3 is a schematic diagram of a test device in the airtightness evaluation performed using the resin molded product. Further, in the examples, the method used for evaluating the airtightness is as follows. (1) Airtightness test Using the resin molded product shown in Fig. 2 as a sample for evaluation,
The airtightness was evaluated using the test device shown in FIG. First, a method of setting an evaluation sample is as follows. A resin molded product is set in a metal container portion of a pressure-resistant airtight container via a rubber O-ring, and then fixed so that the resin molded product is sandwiched between metal upper lids (container The male part and the female part are cut into the upper part and the upper lid part, respectively, so that they are fixed). The pressure-resistant airtight container was put into a water tank, and the pressure in the pressure-resistant airtight container was gradually increased by gradually opening the compressed air valve until a desired pressure was reached. If there is no air leakage in a still state for 1 minute under a predetermined pressure, the airtightness under the pressure is determined to be OK.
The test starts from 0.1 MPa, and if OK, 0.1 MPa
The test was conducted up to a maximum of 0.6 MPa. With respect to the sample which was OK at 0.6 MPa in the airtightness test in the initial state, the airtightness test was similarly performed after performing the following heat shock resistance test for a predetermined cycle. In addition, the test was performed with the sample of n = 5. (2) Heat shock resistance test Using a commercially available heat shock tester,
hr to 150 ° C. × 2 hr) as one cycle, and the resin molded product was taken out of the tank every 20 cycles and subjected to the above airtightness test to evaluate heat shock resistance. Example 1 The surface of a copper insert part having the shape shown in FIG. 1 was immersed in an etching solution A (aqueous solution) having the following composition for 1 minute to remove a rust-preventive film, and then an etching solution B (aqueous solution) having the following composition For 5 minutes to etch the surface of the metal part.・ Etching solution A (temperature 20 ° C.) Hydrogen peroxide 26 g / L sulfuric acid 90 g / L ・ Etching solution B (temperature 25 ° C.) Hydrogen peroxide 80 g / L sulfuric acid 90 g / L Benzotriazole 5 g / L Sodium chloride 0.2 g / L Next, this insert part was set in an injection mold, and 30% by weight of glass fiber (here, "% by weight" means a percentage by mass; the same applies hereinafter) and calcium carbonate
Using a polyphenylene sulfide resin containing 30% by weight, injection molding was performed under the molding conditions shown in Table 1, and FIG.
Were obtained, and the above-mentioned airtightness test was performed. Table 3 shows the results. Example 2 As a molding resin, a polybutylene terephthalate resin containing 15% by weight of glass fiber and 15% by weight of glass flake was used, and injection molding was performed under the molding conditions shown in Table 2. Prepare an evaluation sample in the same manner,
The above airtightness test was performed. Table 3 shows the results. Example 3 The surface of an aluminum insert part having the shape shown in FIG. 1 was immersed in an alkaline degreasing solution (aqueous solution) having the following composition for 5 minutes to perform a degreasing treatment, and then an etching solution C having the following composition was obtained.
(Aqueous solution) for 3 minutes to etch the metal component surface.・ Alkaline degreasing solution (temperature 40 ° C) AS-165F (manufactured by Ebara Uzilite) 50ml / L ・ Etching solution C (temperature 40 ° C) OF-901 (manufactured by Ebara Ujilite) 12g / L magnesium hydroxide 25g / L Next This insert part was set in a mold for injection molding, and injection molding was performed under molding conditions shown in Table 1 using a polyphenylene sulfide resin containing 30% by weight of glass fiber and 30% by weight of calcium carbonate. Were obtained, and the above-mentioned airtightness test was performed. Table 3 shows the results. Example 4 As a molding resin, a polybutylene terephthalate resin containing 15% by weight of glass fiber and 15% by weight of glass flake was used, and injection molding was performed under the molding conditions shown in Table 2. Prepare an evaluation sample in the same way,
The above airtightness test was performed. Table 3 shows the results. Comparative Examples 1 and 2 Evaluation samples were prepared in the same manner as in Examples 1 and 2, except that the copper insert part was not subjected to the chemical etching treatment, and the above airtightness test was performed. Table 3 shows the results. Comparative Examples 3 and 4 Evaluation samples were prepared in the same manner as in Examples 3 and 4, except that the aluminum insert parts were not subjected to the chemical etching treatment, and the airtightness test was performed. Table 3 shows the results.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【表３】 [Table 3]
【００１９】[0019]
【発明の効果】以上の説明及び実施例により明らかなよ
うに、本発明の方法により得られる金属インサート樹脂
成形品は、樹脂／金属界面の気密性が極めて高く、かつ
過酷な環境に曝されてもその優れた気密性を保持できる
ため、長期に渡って信頼性の高い製品が提供可能にな
る。従って、本発明の製造方法により作製される樹脂複
合成形品は、自動車用の各種センサー部品、家電機器用
各種スイッチ部品、各種産業機器用コンデンサー部品等
を始めとして、幅広い分野における金属インサート樹脂
部品に好適に使用し得るものである。As is apparent from the above description and Examples, the metal insert resin molded product obtained by the method of the present invention has extremely high airtightness at the resin / metal interface and is exposed to a severe environment. Can maintain its excellent airtightness, so that a highly reliable product can be provided for a long period of time. Accordingly, the resin composite molded article produced by the production method of the present invention can be used as a metal insert resin part in a wide range of fields, including various sensor parts for automobiles, various switch parts for home electric appliances, capacitor parts for various industrial equipment, and the like. It can be suitably used.
【図１】 実施例で用いた、インサート金属部品の形状
を示す図で、(a) は上面図、(b) は正面図である。FIG. 1 is a view showing the shape of an insert metal part used in Examples, (a) is a top view, and (b) is a front view.
【図２】 実施例で用いた、インサート金属部品に熱可
塑性樹脂材料を射出成形することにより得られた樹脂成
形品の形状を示す図で、(a) は上面図、(b)は斜視図で
ある。FIG. 2 is a view showing the shape of a resin molded product obtained by injection-molding a thermoplastic resin material into an insert metal part used in Examples, (a) is a top view, and (b) is a perspective view. It is.
【図３】 実施例で行なった気密性評価における試験装
置の概略図であり、(a) は全体図、(b) は耐圧気密容器
の拡大断面図である。FIG. 3 is a schematic view of a test device in an airtightness evaluation performed in an example, (a) is an overall view, and (b) is an enlarged sectional view of a pressure-resistant airtight container.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｋ 77:00 Ｂ２９Ｋ 77:00 81:00 81:00 105:22 105:22 705:02 705:02 705:10 705:10 Ｂ２９Ｌ 31:34 Ｂ２９Ｌ 31:34 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme court ゛ (Reference) B29K 77:00 B29K 77:00 81:00 81:00 105: 22 105: 22 705: 02 705: 02 705 : 10 705: 10 B29L 31:34 B29L 31:34
Claims (7)
形品を製造する方法であって、予め金属部品表面をケミ
カルエッチングし、次にこの金属部品を射出成形機の金
型にインサートして熱可塑性樹脂材料を用いて射出成形
することを特徴とする金属インサート樹脂複合成形品の
製造方法。1. A method of manufacturing a resin composite molded article having a metal part inserted therein, wherein the surface of the metal part is subjected to chemical etching in advance, and then the metal part is inserted into a mold of an injection molding machine to form a thermoplastic resin. A method for producing a metal insert-resin composite molded product, comprising injection molding using a resin material.
脂、ポリエチレンテレフタレート樹脂、ポリブチレンテ
レフタレート樹脂、ポリフェニレンサルファイド樹脂、
ポリアミド樹脂、液晶性ポリエステル樹脂、ポリイミド
樹脂、シンジオタクチックポリスチレン樹脂及びポリシ
クロヘキサンジメチレンテレフタレート樹脂からなる群
の中から選ばれた少なくとも１種以上の樹脂を主成分と
する、請求項１記載の金属インサート樹脂複合成形品の
製造方法。2. A thermoplastic resin material comprising: a polyacetal resin, a polyethylene terephthalate resin, a polybutylene terephthalate resin, a polyphenylene sulfide resin,
2. The metal according to claim 1, wherein at least one resin selected from the group consisting of a polyamide resin, a liquid crystalline polyester resin, a polyimide resin, a syndiotactic polystyrene resin, and a polycyclohexane dimethylene terephthalate resin is used as a main component. Manufacturing method of insert resin composite molded product.
ム、アルミニウム合金の何れかからなる請求項１又は２
記載の製造方法により作成された、実質上、気密性を有
する樹脂複合成形品。3. The metal part is made of any one of copper, copper alloy, aluminum, and aluminum alloy.
A substantially airtight resin composite molded article produced by the manufacturing method described in the above.
法により作成された、実質上、気密性を有する樹脂複合
成形品。4. A resin composite molded article having substantially airtightness, produced by the production method according to claim 1.
法により作成された、実質上、電気回路装置の一部をな
す樹脂複合成形品。5. A resin composite molded article substantially forming a part of an electric circuit device, produced by the production method according to claim 1.
ての機能を有する請求項４又は５記載の樹脂複合成形
品。6. The resin composite molded article according to claim 4, wherein the metal component substantially has a function as an electric connection terminal.
何れかの構成部品である請求項４〜６の何れか１項記載
の樹脂複合成形品。7. The resin composite molded product according to claim 4, which is a component of any one of a sensor, a switch, and a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000347891A JP3467471B2 (en) | 1999-12-08 | 2000-11-15 | Manufacturing method of metal insert resin composite molding |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11-349184 | 1999-12-08 | ||
| JP34918499 | 1999-12-08 | ||
| JP2000347891A JP3467471B2 (en) | 1999-12-08 | 2000-11-15 | Manufacturing method of metal insert resin composite molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001225352A true JP2001225352A (en) | 2001-08-21 |
| JP3467471B2 JP3467471B2 (en) | 2003-11-17 |
Family
ID=26578900
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000347891A Expired - Lifetime JP3467471B2 (en) | 1999-12-08 | 2000-11-15 | Manufacturing method of metal insert resin composite molding |
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| Country | Link |
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