JP2014025128A - Composite article of magnesium material and resin component and method for producing the same - Google Patents

Composite article of magnesium material and resin component and method for producing the same Download PDF

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JP2014025128A
JP2014025128A JP2012168184A JP2012168184A JP2014025128A JP 2014025128 A JP2014025128 A JP 2014025128A JP 2012168184 A JP2012168184 A JP 2012168184A JP 2012168184 A JP2012168184 A JP 2012168184A JP 2014025128 A JP2014025128 A JP 2014025128A
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magnesium material
resin component
resin
dihydrogen phosphate
sodium hydroxide
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JP5897423B2 (en
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Tsuyoshi Tanaka
剛 田中
Yasuhiro Watanabe
康弘 渡邉
Toshiyuki Nabekura
利行 鍋倉
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Corona Kogyo Corp
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Corona Kogyo Corp
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Priority to JP2012168184A priority Critical patent/JP5897423B2/en
Priority to PCT/JP2013/070167 priority patent/WO2014021184A1/en
Priority to US14/416,277 priority patent/US20150167194A1/en
Priority to CN201380040890.2A priority patent/CN104583462B/en
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02Anodisation
    • C25D11/30Anodisation of magnesium or alloys based thereon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14311Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiently produce a resin component into a magnesium material.SOLUTION: A magnesium material 2 is immersed into an electrolyte, and voltage is applied thereto to form an anodic oxide film 3 on one side 2A of the magnesium material 2, and a resin component 4 is joined to the magnesium material 2 using the anodic oxide film 3 to produce a composite article 1. The electrolyte is formed by dissolving sodium dihydrogen phosphate and sodium hydroxide into pure water. For example, the weight mixing ratio R1 between the sodium dihydrogen phosphate and the sodium hydroxide is controlled to 1:2≤R1<2:1 and voltage is controlled to 20 to 50 V.

Description

本発明は、マグネシウム材と樹脂部品の複合品とその製造法に関する   The present invention relates to a composite product of a magnesium material and a resin part and a method for producing the same

金属材料に樹脂部品を接合する方法としては、インサート成形用金型を用いることが知られている。具体的には、鉄又は鋼鉄製の金属部品の一部を金型のキャビティ内に挿入し、この状態で溶融させた樹脂をキャビティ内に射出し、所定形状の樹脂部品内に金属部品の一部をインサート成形する。   As a method for joining resin parts to a metal material, it is known to use an insert molding die. Specifically, a part of a metal part made of iron or steel is inserted into the cavity of the mold, and the molten resin in this state is injected into the cavity. Insert molding the part.

また、アルミニウム材に樹脂部品を接合する方法としては、アルミニウム材の表面に孔径が25nm以上の孔を多数有する陽極酸化皮膜を形成し、射出成形などで樹脂の一部を陽極酸化皮膜の孔内に食い込ませることが知られている。   As a method of joining resin parts to an aluminum material, an anodized film having a large number of holes having a diameter of 25 nm or more is formed on the surface of the aluminum material, and a part of the resin is injected into the holes of the anodized film by injection molding or the like. It is known to bite into.

国際公開番号2004/055248号明細書International Publication No. 2004/055248 Specification

ここで、近年では、部品のさらなる軽量化や高強度化を目指し、アルミニウム材の代わりにマグネシウム材を用い、マグネシウム材に樹脂部品を接合することが望まれている。
本発明は、このような事情を鑑みてなされたものであり、マグネシウム材に樹脂部品を効率良く製造できるようにすることを主な目的とする。
In recent years, it has been desired to use a magnesium material instead of an aluminum material and join a resin component to the magnesium material in order to further reduce the weight and strength of the component.
This invention is made | formed in view of such a situation, and makes it the main objective to be able to manufacture a resin component efficiently in a magnesium material.

前記の課題を解決する本発明によれば、リン酸二水素ナトリウムと水酸化ナトリウムを純水に溶かした電解液にマグネシウム材を浸漬させる工程と、前記電解液に浸漬させた前記マグネシウム材に電圧を印加し、前記マグネシウム材の表面に陽極酸化皮膜を形成する工程と、前記陽極酸化皮膜の多数の孔に樹脂部品の一部を浸入させることで前記マグネシウム材と前記樹脂部品を接合する工程と、を有することを特徴とするマグネシウム材と樹脂部品の複合品の製造方法が提供される。   According to the present invention for solving the above problems, a step of immersing a magnesium material in an electrolytic solution in which sodium dihydrogen phosphate and sodium hydroxide are dissolved in pure water, and a voltage applied to the magnesium material immersed in the electrolytic solution. And forming a anodic oxide film on the surface of the magnesium material, and joining the magnesium material and the resin part by allowing a part of the resin part to enter a large number of holes in the anodic oxide film; A method for producing a composite product of a magnesium material and a resin part is provided.

また、前記リン酸二水素ナトリウムと前記水酸化ナトリウムの重量混合比R1は、1:2≦R1<2:1であることを特徴とする請求項1に記載のマグネシウム材と樹脂部品の複合品の製造方法が提供される。   2. The composite material of magnesium material and resin part according to claim 1, wherein a weight mixing ratio R1 of the sodium dihydrogen phosphate and the sodium hydroxide is 1: 2 ≦ R1 <2: 1. A manufacturing method is provided.

また、前記マグネシウム材への印加電圧は、10V〜50Vであることを特徴とする請求項1に記載のマグネシウム材と樹脂部品の複合品の製造方法が提供される。   Moreover, the applied voltage to the said magnesium material is 10V-50V, The manufacturing method of the composite material of the magnesium material and resin component of Claim 1 characterized by the above-mentioned is provided.

さらに、前記リン酸二水素ナトリウムと前記水酸化ナトリウムの重量比を1:1としたことを特徴とする請求項1に記載のマグネシウム材と樹脂部品の複合品の製造方法が提供される。   Furthermore, the weight ratio of the said sodium dihydrogen phosphate and the said sodium hydroxide was set to 1: 1, The manufacturing method of the composite material of the magnesium material of Claim 1 characterized by the above-mentioned is provided.

そして、請求項1から請求項3のいずれか一項に係るマグネシウム材と樹脂部品の複合品の製造方法を用いて製造したことを特徴とする複合品が提供される。   And the composite goods manufactured using the manufacturing method of the composite goods of the magnesium material and resin component which concern on any one of Claims 1-3 are provided.

本発明によれば、水酸化ナトリウムとリン酸二水素ナトリウムを混合させた電解液を用いてマグネシウム材に陽極酸化皮膜を形成することによって、樹脂部品を安定して接合することができる。   According to the present invention, resin parts can be stably joined by forming an anodized film on a magnesium material using an electrolytic solution in which sodium hydroxide and sodium dihydrogen phosphate are mixed.

図1は、本発明の実施の形態に係るマグネシウム材と樹脂部品の複合品の構成を示す断面図である。FIG. 1 is a cross-sectional view showing a configuration of a composite product of a magnesium material and a resin part according to an embodiment of the present invention. 図2は、本発明の実施の形態に係るマグネシウム材と樹脂部品の複合品の製造方法を説明するフローチャートである。FIG. 2 is a flowchart illustrating a method for manufacturing a composite product of a magnesium material and a resin component according to an embodiment of the present invention. 図3は、本発明の実施の形態に係るマグネシウム材に形成した陽極酸化皮膜の断面図である。FIG. 3 is a cross-sectional view of the anodized film formed on the magnesium material according to the embodiment of the present invention. 図4は、本発明の実施の形態に係るマグネシウム材の陽極酸化皮膜に樹脂部品を接合する方法の一例を示す断面図である。FIG. 4 is a cross-sectional view showing an example of a method for joining a resin component to the anodized film of magnesium material according to the embodiment of the present invention. 図5は、本発明の実施の形態に係るマグネシウム材に陽極酸化皮膜を形成するプロセスの実施例を示す図である。FIG. 5 is a diagram showing an example of a process for forming an anodized film on the magnesium material according to the embodiment of the present invention. 図6は、本発明の実施の形態に係るマグネシウム材に陽極酸化皮膜を形成するプロセスの実施例を示す図である。FIG. 6 is a diagram showing an example of a process for forming an anodized film on the magnesium material according to the embodiment of the present invention. 図7は、本発明の実施の形態に係るマグネシウム材に陽極酸化皮膜を形成するプロセスの実施例を示す図である。FIG. 7 is a diagram showing an example of a process for forming an anodized film on a magnesium material according to an embodiment of the present invention.

本発明を実施するための形態について以下に説明する。
図1の断面図に示すように、複合品1は、マグネシウム材2を有し、マグネシウム材2の一方の面2Aに形成した陽極酸化皮膜3を用いて樹脂部品4を接合した構成を有する。
A mode for carrying out the present invention will be described below.
As shown in the cross-sectional view of FIG. 1, the composite product 1 includes a magnesium material 2 and has a configuration in which a resin component 4 is bonded using an anodized film 3 formed on one surface 2 </ b> A of the magnesium material 2.

続いて、マグネシウム材と樹脂部品の複合品の製造方法の概略について、図2のフローチャートを用いて説明する。
最初に、ステップS101で、マグネシウム材2をプレス加工して、所定の形状に成形する。次に、ステップS102で、マグネシウム材2に接合用皮膜として、ポーラスな陽極酸化皮膜3を形成する。
Then, the outline of the manufacturing method of the composite material of a magnesium material and a resin component is demonstrated using the flowchart of FIG.
First, in step S101, the magnesium material 2 is pressed and formed into a predetermined shape. Next, in step S102, a porous anodic oxide film 3 is formed on the magnesium material 2 as a bonding film.

さらに、ステップS103で、陽極酸化皮膜3を形成した領域に樹脂部品4を接合する。図1に示すように、樹脂部品4は、陽極酸化皮膜3の孔6に食い込むようにしてマグネシウム材2に接合され、これによりマグネシウム材2と樹脂部品4の複合品1が形成される。   Further, in step S103, the resin component 4 is joined to the region where the anodized film 3 is formed. As shown in FIG. 1, the resin component 4 is joined to the magnesium material 2 so as to bite into the holes 6 of the anodized film 3, thereby forming a composite product 1 of the magnesium material 2 and the resin component 4.

さらに、ステップS104で、複合品1に対して後処理を行う。後処理としては、マグネシウム材2の他方の面2Bの塗装があげられる。なお、ステップS104を実施せずに処理を終了しても良い。   Further, post-processing is performed on the composite product 1 in step S104. As the post-treatment, the other surface 2B of the magnesium material 2 can be painted. Note that the processing may be terminated without performing step S104.

次に、ステップS102の接合用皮膜の形成処理の詳細について説明する。
まず、マグネシウム材2の脱脂処理及び中和処理を必要に応じて行う。次いで、マグネシウム材2を電解槽に入れる。電解槽には、強アルカリ性物質と弱酸性物質とを純水に溶解させた電解液が貯溜されている。強アルカリ性物質としては、例えば、水酸化ナトリウムが用いられる。弱酸性物質としては、リン酸ナトリウム、より具体的にはリン酸二水素ナトリウム(NaHPO)が用いられる。水酸化ナトリウムとリン酸二水素ナトリウムは、純水40Lに対して、それぞれ1kgから3kgとする。さらに、電解液は、30℃〜40℃に温度調整されている。マグネシウム材2は、陽極として使用され、陰極にはステンレス板などを用いる。そして、電圧10V〜50Vの範囲で直流法による電気分解を、例えば3分〜10分行う。
Next, the details of the bonding film forming process in step S102 will be described.
First, the degreasing treatment and neutralization treatment of the magnesium material 2 are performed as necessary. Next, the magnesium material 2 is put into an electrolytic cell. In the electrolytic cell, an electrolytic solution in which a strong alkaline substance and a weak acidic substance are dissolved in pure water is stored. For example, sodium hydroxide is used as the strong alkaline substance. As the weakly acidic substance, sodium phosphate, more specifically, sodium dihydrogen phosphate (NaH 2 PO 4 ) is used. Sodium hydroxide and sodium dihydrogen phosphate are 1 kg to 3 kg with respect to 40 L of pure water. Furthermore, the temperature of the electrolytic solution is adjusted to 30 ° C. to 40 ° C. The magnesium material 2 is used as an anode, and a stainless plate or the like is used as the cathode. And the electrolysis by the direct current method is performed in a voltage range of 10 V to 50 V, for example, for 3 minutes to 10 minutes.

これにより、図3に断面形状を示すように、マグネシウム材2の一方の面2A上に深さ0.5〜1.5μ程度のポーラスな陽極酸化皮膜3が形成される。陽極酸化皮膜3は、表面に開口する細長い孔6が密集する多孔質層5Aと、多孔質層5Aの底部から金属面までの薄い緻密な絶縁層5Bとを有する。また、陽極酸化皮膜3の表面に形成された多数の孔6の直径は約20〜100nmであった。陽極酸化皮膜3を形成したら、マグネシウム材2を純水で洗浄した後、熱風で乾燥する。   As a result, a porous anodic oxide film 3 having a depth of about 0.5 to 1.5 μm is formed on one surface 2A of the magnesium material 2 as shown in FIG. The anodized film 3 includes a porous layer 5A in which elongated holes 6 that are open on the surface are dense, and a thin dense insulating layer 5B from the bottom of the porous layer 5A to the metal surface. Moreover, the diameter of the many holes 6 formed on the surface of the anodized film 3 was about 20 to 100 nm. After the anodic oxide film 3 is formed, the magnesium material 2 is washed with pure water and then dried with hot air.

次に、ステップS103のマグネシウム材2に樹脂部品を接合する工程について説明する。
図4に、この工程で使用される射出成形機の一例を示す。射出成形機20は、上下に方開き可能な金型21を有し、下型21Aと上型21Bの間に、マグネシウム材2を設置するスペース22が形成されている。さらに、上型21Bには、樹脂部品4の形状に合わせたキャビティ23と、キャビティ23に充填する樹脂24が通るゲート25とが形成されている。なお、ゲート25は、図示を省略する樹脂24の供給源に接続されている。
Next, the process of joining resin parts to the magnesium material 2 in step S103 will be described.
FIG. 4 shows an example of an injection molding machine used in this process. The injection molding machine 20 has a mold 21 that can be opened up and down, and a space 22 for installing the magnesium material 2 is formed between the lower mold 21A and the upper mold 21B. Further, the upper mold 21B is formed with a cavity 23 that matches the shape of the resin component 4 and a gate 25 through which the resin 24 filling the cavity 23 passes. The gate 25 is connected to a supply source of the resin 24 (not shown).

樹脂24としては、PP(ポリプロピレン)、PE(ポリエチレン)、PBT(ポリブチレンテレフタレート)、PPS(ポリフェニレンスルフィド)などの各種樹脂およびシリコーンなどが使用できる。なお、マグネシウム材2と樹脂24の線膨張の違いを考慮し、前記の射出成形により樹脂成形体とする樹脂材として、その線膨張の差を吸収できる弾性率、好ましくは、10000Mpa以下の弾性率を有し、且つ耐熱水性と耐薬品性を有する樹脂を選択することが好ましい。これに好適な樹脂24としては、PBTやPE、PPなどのオレフィン系樹脂があげられる。   As the resin 24, various resins such as PP (polypropylene), PE (polyethylene), PBT (polybutylene terephthalate), PPS (polyphenylene sulfide), and silicone can be used. In consideration of the difference in linear expansion between the magnesium material 2 and the resin 24, the elastic modulus that can absorb the difference in linear expansion as a resin material to be a resin molded body by the above injection molding, preferably an elastic modulus of 10,000 Mpa or less It is preferable to select a resin having hot water resistance and chemical resistance. Suitable resins 24 for this include olefin resins such as PBT, PE, and PP.

樹脂部品4を成形するときは、金型21を型開きしてスペース22にマグネシウム材2を設置する。マグネシウム材2は、陽極酸化皮膜3が上向き、即ち陽極酸化皮膜3がゲート25に対向するように配置する。金型21を閉じた後、溶融させた樹脂24をゲート25からキャビティ23内に射出させる。これにより、溶融した樹脂24がキャビティ23内に加圧充填されると共に、陽極酸化皮膜3の多数の孔6内に侵入する。
この後、型開きすると、図1に示すような複合品1が得られる。複合品1は、陽極酸化皮膜3の多数の孔6内に樹脂部品4を構成する樹脂24が一部食い込んで接合された構成を有する。
When molding the resin component 4, the mold 21 is opened and the magnesium material 2 is placed in the space 22. The magnesium material 2 is disposed so that the anodized film 3 faces upward, that is, the anodized film 3 faces the gate 25. After the mold 21 is closed, the molten resin 24 is injected from the gate 25 into the cavity 23. As a result, the melted resin 24 is pressure-filled into the cavity 23 and enters the numerous holes 6 of the anodized film 3.
Thereafter, when the mold is opened, a composite product 1 as shown in FIG. 1 is obtained. The composite article 1 has a configuration in which a part of the resin 24 constituting the resin component 4 is bitten into the numerous holes 6 of the anodized film 3 and joined.

このようにして製造した複合品1におけるマグネシウム材2と樹脂部品4の接合強度を、押し込み試験機を用いた押し込み強度として測定した結果、20N以上の押し込み強さが得られた。なお、樹脂部品4をマグネシウム材に接合する工程は、加熱圧着方式やその他の方法を用いても良い。   As a result of measuring the bonding strength between the magnesium material 2 and the resin component 4 in the composite article 1 thus manufactured as an indentation strength using an indentation tester, an indentation strength of 20 N or more was obtained. In addition, the process of joining the resin component 4 to the magnesium material may use a thermocompression bonding method or other methods.

以上、説明したように、この実施の形態によれば、水酸化ナトリウムとリン酸二水素ナトリウムを混合させた電解液を用いてマグネシウム材2に陽極酸化皮膜3を形成することによって、樹脂部品4との接合が可能になる。   As described above, according to this embodiment, the resin component 4 is formed by forming the anodic oxide film 3 on the magnesium material 2 using the electrolytic solution in which sodium hydroxide and sodium dihydrogen phosphate are mixed. Can be joined.

(実施例)
以下に実施例について説明する。
図5(a)に示す実施例では、電解液は、純水40lにリン酸二水素ナトリウムを2kg溶かした。電解液の温度は35℃とし、通電時間は5分とした。電圧は、10Vから50Vの範囲で、10V刻みで実験を行った。その結果、いずれの電圧においてもマグネシウム素材2の表面が電解液に腐食されて劣化した。このために、リン酸二水素ナトリウムのみでは、陽極酸化皮膜3の形成には適さないことが分かった。
(Example)
Examples will be described below.
In the example shown in FIG. 5A, 2 kg of sodium dihydrogen phosphate was dissolved in 40 l of pure water as the electrolytic solution. The temperature of the electrolytic solution was 35 ° C., and the energization time was 5 minutes. The voltage was in the range of 10V to 50V, and the experiment was performed in increments of 10V. As a result, at any voltage, the surface of the magnesium material 2 was corroded by the electrolytic solution and deteriorated. For this reason, it was found that sodium dihydrogen phosphate alone is not suitable for forming the anodic oxide film 3.

図5(b)に示す実施例では、電解液は、純水40lにリン酸二水素ナトリウムを2kg、水酸化ナトリウムを1kg溶かした。電解液の温度は35℃とし、通電時間は5分とした。電圧は、10Vから50Vの範囲で、10V刻みで実験を行った。その結果、いずれの電圧においてもマグネシウム素材2の表面が電解液に腐食されて劣化すると共に、陽極酸化皮膜3は形成されなかった。従って、この条件は、陽極酸化皮膜3の形成には適さないことが分かった。   In the example shown in FIG. 5B, the electrolytic solution was obtained by dissolving 2 kg of sodium dihydrogen phosphate and 1 kg of sodium hydroxide in 40 l of pure water. The temperature of the electrolytic solution was 35 ° C., and the energization time was 5 minutes. The voltage was in the range of 10V to 50V, and the experiment was performed in increments of 10V. As a result, the surface of the magnesium material 2 was corroded by the electrolytic solution and deteriorated at any voltage, and the anodic oxide film 3 was not formed. Therefore, it was found that this condition is not suitable for forming the anodic oxide film 3.

図6(a)に示す実施例では、電解液は、純水40lに水酸化ナトリウムを500g溶かした。電解液の温度は35℃とし、通電時間は5分とした。電圧は、10Vから50Vの範囲で、10V刻みで実験を行った。その結果、印加電圧が10Vのときは、マグネシウム材2の表面に劣化が生じた。印加電圧が20V、30V、40Vのケースでは、陽極酸化皮膜3を形成することができた。これらの条件によって形成した陽極酸化皮膜3を用いてマグネシウム材2に樹脂部品4を接合し、接合強度を押し込み強度試験によって調べたところ、印加電圧が20V、30V、40Vのそれぞれのケースにおいて、樹脂部品4の接合強度の平均値は、順番に20N、50N、30Nであった。しかしながら、接合強度にムラがあり、接合には不向きであると考えられる。そして、印加電圧50Vのケースでは、マグネシウム材2の表面に劣化は発生しないが、樹脂部品4を接合することはできなかった。従って、この電解液は、陽極酸化皮膜3の形成には適さないことが分かった。なお、純水に溶かす水酸化ナトリウムの量をさらに増加させたところ、マグネシウム材2の劣化が顕著になった。   In the example shown in FIG. 6A, 500 g of sodium hydroxide was dissolved in 40 l of pure water as the electrolytic solution. The temperature of the electrolytic solution was 35 ° C., and the energization time was 5 minutes. The voltage was in the range of 10V to 50V, and the experiment was performed in increments of 10V. As a result, when the applied voltage was 10 V, the surface of the magnesium material 2 was deteriorated. In cases where the applied voltage was 20V, 30V, or 40V, the anodic oxide film 3 could be formed. The resin component 4 was joined to the magnesium material 2 using the anodic oxide film 3 formed under these conditions, and the joining strength was examined by an indentation strength test. In each case where the applied voltage was 20V, 30V, and 40V, The average value of the joint strength of the component 4 was 20N, 50N, and 30N in order. However, it is considered that the bonding strength is uneven and unsuitable for bonding. And in the case of the applied voltage 50V, although deterioration did not generate | occur | produce on the surface of the magnesium material 2, the resin component 4 was not able to be joined. Therefore, it was found that this electrolytic solution is not suitable for forming the anodic oxide film 3. When the amount of sodium hydroxide dissolved in pure water was further increased, the deterioration of the magnesium material 2 became remarkable.

図6(b)に示す実施例では、電解液は、純水40lにリン酸二水素ナトリウムを1kg、水酸化ナトリウムを2kg溶かした。電解液の温度は35℃とし、通電時間は5分とした。電圧は、10Vから50Vの範囲で、10V刻みで実験を行った。その結果、印加電圧10Vのときは、マグネシウム材2の表面に劣化が生じてしまい、接合には不向きであった。印加電圧20Vで形成した陽極酸化皮膜3を用いて製造した複合品1の樹脂部品4の接合強度の平均値は、60Nであった。同様に、印加電圧が30V、40Vのケースでは、樹脂部品4の接合強度の平均値がそれぞれ50Nと30Nであった。印加電圧が50Vのケースでは、表面の劣化は生じなかったが、接合はできなかった。従って、この電解液では、20V〜40Vの間で陽極酸化皮膜3を形成すると、樹脂部品4を接合することができる。   In the example shown in FIG. 6B, the electrolytic solution was obtained by dissolving 1 kg of sodium dihydrogen phosphate and 2 kg of sodium hydroxide in 40 l of pure water. The temperature of the electrolytic solution was 35 ° C., and the energization time was 5 minutes. The voltage was in the range of 10V to 50V, and the experiment was performed in increments of 10V. As a result, when the applied voltage was 10 V, the surface of the magnesium material 2 was deteriorated and unsuitable for bonding. The average value of the bonding strength of the resin component 4 of the composite product 1 manufactured using the anodized film 3 formed at an applied voltage of 20 V was 60N. Similarly, in the cases where the applied voltages were 30V and 40V, the average values of the bonding strength of the resin parts 4 were 50N and 30N, respectively. In the case where the applied voltage was 50 V, surface degradation did not occur, but bonding was not possible. Therefore, in this electrolytic solution, the resin component 4 can be joined when the anodized film 3 is formed between 20V and 40V.

図7(a)に示す例において、電解液は、純水40lにリン酸二水素ナトリウムを2kg、水酸化ナトリウムを2kg溶かした。電解液の温度は35℃とし、通電時間は5分とした。電圧は、10Vから50Vの範囲で、10V刻みで実験を行った。その結果、印加電圧が10Vのケースにおける複合品1の接合強度の平均値は、40Nであった。さらに、印加電圧が20V、30V、40V、50Vのそれぞれのケースにおける複合品1の接合強度の平均値は、順番に50N、70N、70N、20Nであった。マグネシウム材2の表面は、印加電圧が10V及び20Vでは劣化が僅かながら生じていたが、30V以上では劣化は認められなかった。従って、この電解液では、10V〜50Vの範囲で、樹脂部品4を安定して接合することができた。さらに、マグネシウム材2の表面状態と接合強度の2つの観点からは、印加電圧は30V〜40Vがより好ましい条件であることが分かった。   In the example shown in FIG. 7A, the electrolytic solution was obtained by dissolving 2 kg of sodium dihydrogen phosphate and 2 kg of sodium hydroxide in 40 l of pure water. The temperature of the electrolytic solution was 35 ° C., and the energization time was 5 minutes. The voltage was in the range of 10V to 50V, and the experiment was performed in increments of 10V. As a result, the average value of the bonding strength of the composite article 1 in the case where the applied voltage was 10 V was 40N. Furthermore, the average value of the bonding strength of the composite article 1 in each case where the applied voltage was 20V, 30V, 40V, and 50V was 50N, 70N, 70N, and 20N in order. The surface of the magnesium material 2 slightly deteriorated when the applied voltage was 10 V and 20 V, but no deterioration was observed when the applied voltage was 30 V or more. Therefore, with this electrolytic solution, the resin component 4 could be stably joined in the range of 10V to 50V. Furthermore, from the two viewpoints of the surface state of the magnesium material 2 and the bonding strength, it was found that the applied voltage is more preferably 30V to 40V.

図7(b)に示す例において、電解液は、純水40lにリン酸二水素ナトリウムを3kg、水酸化ナトリウムを3kg溶かした。電解液の温度は35℃とし、通電時間は5分とした。電圧は、10Vから50Vの範囲で、10V刻みで実験を行った。その結果、印加電圧が10Vのケースにおける複合品1の接合強度の平均値は、80Nであった。印加電圧が20V、30V、40V、50Vのそれぞれのケースにおける複合品1の接合強度の平均値は、順番に70N、85N、55N、50Nであった。マグネシウム材2の表面は
、印加電圧が10V及び20Vのケースでは劣化が僅かながら生じていたが、印加電圧が30V以上では劣化は認められなかった。従って、この電解液では、印加電圧が10V〜50Vの範囲で樹脂部品4を接合することができる。なお、実施例の電解液は、電解槽中に一部が結晶化していた。これは、40lの純水に対してリン酸二水素ナトリウム及び水酸化ナトリウムの混合量が多くなり過ぎて、電解液が飽和していたためであると考えられる。
In the example shown in FIG. 7B, the electrolytic solution was obtained by dissolving 3 kg of sodium dihydrogen phosphate and 3 kg of sodium hydroxide in 40 l of pure water. The temperature of the electrolytic solution was 35 ° C., and the energization time was 5 minutes. The voltage was in the range of 10V to 50V, and the experiment was performed in increments of 10V. As a result, the average value of the bonding strength of the composite product 1 in the case where the applied voltage was 10 V was 80N. The average value of the bonding strength of the composite article 1 in each case where the applied voltage was 20V, 30V, 40V, and 50V was 70N, 85N, 55N, and 50N in order. The surface of the magnesium material 2 was slightly deteriorated when the applied voltage was 10 V and 20 V, but no deterioration was observed when the applied voltage was 30 V or more. Therefore, with this electrolytic solution, the resin component 4 can be joined within an applied voltage range of 10V to 50V. In addition, the electrolyte solution of the Example was partially crystallized in the electrolytic cell. This is considered to be because the amount of the mixture of sodium dihydrogen phosphate and sodium hydroxide was excessive with respect to 40 l of pure water, and the electrolyte was saturated.

以上の結果から、例えば図5(a)の実施例に示すように、リン酸二水素ナトリウムと純水だけで電解液を形成した場合は、複合品1の製造に適した陽極酸化皮膜3を形成できなかった。これは、処理時のマグネシウム材2の表面の溶解速度が陽極酸化皮膜3の生成速度を超え、マグネシウム表面が削られる割合が多くなって表面が劣化すると考えられる。この現象は、印加電圧が低い場合に特に顕著に現われる。これに対して、印加電圧を上昇させると、陽極酸化皮膜3の生成速度が大きくなってマグネシウム材2の表面の劣化よりも陽極酸化皮膜3の生成が支配的になると考えられる。   From the above results, for example, as shown in the embodiment of FIG. 5A, when the electrolytic solution is formed only with sodium dihydrogen phosphate and pure water, an anodic oxide film 3 suitable for manufacturing the composite article 1 is obtained. Could not be formed. This is considered that the dissolution rate of the surface of the magnesium material 2 during the treatment exceeds the generation rate of the anodic oxide film 3, and the ratio at which the magnesium surface is scraped increases so that the surface deteriorates. This phenomenon is particularly noticeable when the applied voltage is low. On the other hand, when the applied voltage is increased, the generation rate of the anodic oxide film 3 is increased, and the generation of the anodic oxide film 3 is considered to be dominant over the deterioration of the surface of the magnesium material 2.

さらに、図6(a)の実施例に示すように、水酸化ナトリウムと純水だけで電解液を形成した場合に形成される陽極酸化皮膜3では、十分な接合強度を安定して得難い。   Furthermore, as shown in the embodiment of FIG. 6A, it is difficult to stably obtain sufficient bonding strength with the anodic oxide film 3 formed when the electrolytic solution is formed only with sodium hydroxide and pure water.

これに対して、図6(b)及び図7に示すように、リン酸二水素ナトリウムにリン酸二水素ナトリウムを添加したところ、複合品1の製造に適した陽極酸化皮膜3を形成できた。これは、水酸化ナトリウムに添加されたリン酸二水素ナトリウムが、マグネシウム素材1の溶解速度の調整剤として機能し、マグネシウム材2の表面の溶解速度と、陽極酸化皮膜3の生成のバランスが調整され、十分な接合強度が得られるような陽極酸化皮膜3が形成されたためであると考えられる。   On the other hand, as shown in FIG. 6B and FIG. 7, when sodium dihydrogen phosphate was added to sodium dihydrogen phosphate, an anodic oxide film 3 suitable for the production of composite product 1 could be formed. . This is because sodium dihydrogen phosphate added to sodium hydroxide functions as a regulator of the dissolution rate of the magnesium material 1, and the balance between the dissolution rate of the surface of the magnesium material 2 and the formation of the anodized film 3 is adjusted. This is considered to be because the anodic oxide film 3 was formed so that sufficient bonding strength was obtained.

さらに、純水に溶かすリン酸二水素ナトリウムの重量は、水酸化ナトリウムの重量より多くなり過ぎない方が、安定した接合強度が得られる。このようなリン酸二水素ナトリウムと水酸化ナトリウムの重量比R1は、1:2≦R1<2:1であった。また、重量比R1のより好ましい例は、1:1であった。このときにマグネシウム材1に印加する電圧は、10V以上、例えば、10V〜50Vが好ましい。これによって、マグネシウム材2に樹脂部品4を安定して接合することが可能になり、十分な接合強度を有する複合品1を製造することが可能になる。   Furthermore, stable bonding strength can be obtained if the weight of sodium dihydrogen phosphate dissolved in pure water is not too much than the weight of sodium hydroxide. The weight ratio R1 of sodium dihydrogen phosphate to sodium hydroxide was 1: 2 ≦ R1 <2: 1. A more preferred example of the weight ratio R1 was 1: 1. At this time, the voltage applied to the magnesium material 1 is preferably 10 V or more, for example, 10 V to 50 V. As a result, the resin component 4 can be stably bonded to the magnesium material 2, and the composite product 1 having sufficient bonding strength can be manufactured.

なお、各実施の形態に係る複合品は、パーソナルコンピュータや携帯電話などの電気機器、電子機器などの部品、建材、建造物の屋内,外装置品、船舶、航空機、鉄道車両及び自動車などの内,外装置品、ナンバープレートなどの装飾品などの種々の大きさと形状を有するマグネシウム材と樹脂部品との複合品に適用できる。   The composite product according to each embodiment includes components such as electrical devices such as personal computers and mobile phones, electronic device parts, building materials, indoor and outdoor equipment products, ships, aircraft, railway vehicles, automobiles, and the like. , It can be applied to composite products of magnesium materials and resin parts having various sizes and shapes, such as external device products and decorations such as license plates.

1 複合品
2 マグネシウム材
3 陽極酸化皮膜
6 孔
4 樹脂部品
DESCRIPTION OF SYMBOLS 1 Composite product 2 Magnesium material 3 Anodized film 6 Hole 4 Resin part

Claims (5)

リン酸二水素ナトリウムと水酸化ナトリウムを純水に溶かした電解液にマグネシウム材を浸漬させる工程と、
前記電解液に浸漬させた前記マグネシウム材に電圧を印加し、前記マグネシウム材の表面に陽極酸化皮膜を形成する工程と、
前記陽極酸化皮膜の多数の孔に樹脂部品の一部を浸入させることで前記マグネシウム材と前記樹脂部品を接合する工程と、
を有することを特徴とするマグネシウム材と樹脂部品の複合品の製造方法。
Immersing the magnesium material in an electrolytic solution in which sodium dihydrogen phosphate and sodium hydroxide are dissolved in pure water;
Applying a voltage to the magnesium material immersed in the electrolyte, and forming an anodized film on the surface of the magnesium material;
Bonding the magnesium material and the resin component by allowing a part of the resin component to enter a large number of holes in the anodized film;
A method for producing a composite product of a magnesium material and a resin part, comprising:
前記リン酸二水素ナトリウムと前記水酸化ナトリウムの重量混合比R1は、1:2≦R1<2:1であることを特徴とする請求項1に記載のマグネシウム材と樹脂部品の複合品の製造方法。   The weight mixing ratio R1 of the sodium dihydrogen phosphate and the sodium hydroxide is 1: 2 ≦ R1 <2: 1. Method. 前記マグネシウム材への印加電圧は、10V〜50Vであることを特徴とする請求項1に記載のマグネシウム材と樹脂部品の複合品の製造方法。   2. The method of manufacturing a composite product of a magnesium material and a resin part according to claim 1, wherein an applied voltage to the magnesium material is 10 V to 50 V. 3. 前記リン酸二水素ナトリウムと前記水酸化ナトリウムの重量比を1:1としたことを特徴とする請求項1に記載のマグネシウム材と樹脂部品の複合品の製造方法。   The method for producing a composite product of a magnesium material and a resin part according to claim 1, wherein a weight ratio of the sodium dihydrogen phosphate and the sodium hydroxide is 1: 1. 請求項1から請求項3のいずれか一項に係るマグネシウム材と樹脂部品の複合品の製造方法を用いて製造したことを特徴とする複合品。   A composite product manufactured using the method for manufacturing a composite product of a magnesium material and a resin component according to any one of claims 1 to 3.
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