JP2015136828A - insert molding - Google Patents

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JP2015136828A
JP2015136828A JP2014008654A JP2014008654A JP2015136828A JP 2015136828 A JP2015136828 A JP 2015136828A JP 2014008654 A JP2014008654 A JP 2014008654A JP 2014008654 A JP2014008654 A JP 2014008654A JP 2015136828 A JP2015136828 A JP 2015136828A
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fiber
insert
containing resin
fibers
metal insert
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洋平 宮崎
Yohei Miyazaki
洋平 宮崎
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Toyota Motor Corp
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Toyota Motor Corp
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  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an insert molding in which a metal insert having a breaking part is included in a fiber-containing resin material, where fiber composing the fiber-containing resin material is sufficiently present at the breaking part, thus the joining strength between the metal insert and the fiber-containing resin material is high.SOLUTION: Provided is an insert molding 10 in which a metal insert 1 having a breaking part is included in a fiber-containing resin 2, in which a notch 1c is formed at a minor angle side 1b of the breaking part.

Description

本発明は、金属インサートが繊維含有樹脂材に内包されているインサート成形品に関するものである。   The present invention relates to an insert molded product in which a metal insert is included in a fiber-containing resin material.

繊維強化プラスチック(FRP)内に金属インサートが内包されているインサート成形品は、車両の様々な部位で適用されている。   An insert molded product in which a metal insert is included in a fiber reinforced plastic (FRP) is applied in various parts of a vehicle.

このように異種部材から構成されるインサート成形品においては、たとえば炭素繊維強化プラスチック(CFRP)とアルミ等からなる金属インサートの線膨張係数が大きく異なり(CFRPが相対的に小さい)、したがって線膨張差が生じる。   In insert molded products composed of different kinds of members in this way, for example, the linear expansion coefficient of a carbon fiber reinforced plastic (CFRP) and a metal insert made of aluminum or the like is greatly different (CFRP is relatively small), and therefore the linear expansion difference is different. Occurs.

そこで、金属インサートの側面に折れ部を有する溝等を設けておき、この溝にCFRPが入り込むようにして内包させることでアンカー効果を発揮させ、異種部材同士の接合強度を高める措置が講じられている。なお、特許文献1には、このように側面に折れ部を備えた金属インサートが繊維強化プラスチック内に内包されているインサート成形品が開示されている。   Therefore, measures such as providing a groove with a bent portion on the side surface of the metal insert and exhibiting an anchor effect by encapsulating the CFRP into the groove to increase the bonding strength between different members are taken. Yes. Patent Document 1 discloses an insert-molded product in which a metal insert having a bent portion on its side surface is enclosed in a fiber reinforced plastic.

このインサート成形品の製造方法としては、成形型内に金属インサートを載置し、溶融した繊維含有樹脂を注入する方法や、成形型内に金属インサートを載置するとともに裁断された繊維材からなる繊維材群を配設してマトリックス樹脂を注入する方法、さらには、成形型内に金属インサートを載置し、さらにシートモールディングコンパウンド(SMC)を成形型内に配設して加熱および加圧を実施する方法などがある。   As a manufacturing method of this insert molded product, a metal insert is placed in a mold and a molten fiber-containing resin is injected, or a metal insert is placed in a mold and is made of a cut fiber material. A method of injecting a matrix resin by arranging a group of fibers, and further placing a metal insert in a mold and further arranging a sheet molding compound (SMC) in the mold to heat and pressurize. There are methods to implement.

いずれの方法においても、繊維を含んだ樹脂の型内における流動性は一般に悪く、繊維よりも先に樹脂が流動し、繊維は樹脂の流動に追随するために、金属インサートの溝、中でも、溝を構成する折れ部の劣角側に溶融樹脂は流れ込む一方で、繊維が十分に流れ込まないといった問題がある。   In any of the methods, the fluidity in the resin mold containing the fibers is generally poor and the resin flows before the fibers, and the fibers follow the resin flow. While the molten resin flows into the under-angled side of the bent portion constituting the fiber, there is a problem that the fibers do not sufficiently flow.

このように樹脂のみが流れ込んで繊維が少ない、もしくは繊維が存在しないと、当該領域における異種部材間の接合強度(金属インサートの引抜き強度等)が低くなり、インサート成形品そのものの強度低下の要因となる。   In this way, if only resin flows in and there are few fibers, or if there are no fibers, the bonding strength between different members in the region (such as the pulling strength of the metal insert) will be low, which will cause the strength reduction of the insert molded product itself. Become.

このことを、図3を参照して説明する。   This will be described with reference to FIG.

同図において、繊維含有樹脂材P内に金属インサートKが内包されてインサート成形品Mが構成されている。金属インサートKはナット溝Kaのほか、その側面に複数の折れ部Kb(図示例では直角部)を有しており、複数の折れ部Kbによって樹脂を入り込ませる溝が形成されている。   In the figure, a metal insert K is included in a fiber-containing resin material P to form an insert molded product M. In addition to the nut groove Ka, the metal insert K has a plurality of bent portions Kb (right-angled portions in the illustrated example) on its side surface, and a groove for allowing resin to enter is formed by the plurality of bent portions Kb.

このインサート成形品Mを、上記する成形型内に樹脂を注入する方法やSMCを成形型内に配設して加熱および加圧を実施する方法で製造した際に、溝を構成する折れ部Kbの劣角側に樹脂は流れ込む一方で繊維Paが十分に流れ込まない結果、金属インサートの引抜き強度等が低くなり、インサート成形品Mそのものの強度が低下するというものである。   When this insert molded product M is manufactured by a method of injecting a resin into the above-described mold or a method of heating and pressurizing by placing an SMC in the mold, the bent portion Kb constituting the groove As a result of the resin flowing into the minor angle side, the fiber Pa does not flow sufficiently. As a result, the pullout strength of the metal insert is lowered, and the strength of the insert molded product M itself is lowered.

特開2013−119926号公報JP 2013-119926 A

本発明は上記する問題に鑑みてなされたものであり、折れ部を有する金属インサートが繊維含有樹脂材に内包されているインサート成形品に関し、この折れ部に繊維含有樹脂材を構成する繊維が十分に存在し、もって金属インサートと繊維含有樹脂材の間の接合強度の高いインサート成形品を提供することを目的とする。   The present invention has been made in view of the above-described problems, and relates to an insert molded product in which a metal insert having a bent portion is included in a fiber-containing resin material, and fibers constituting the fiber-containing resin material are sufficient in the bent portion. Therefore, an object of the present invention is to provide an insert molded product having a high bonding strength between the metal insert and the fiber-containing resin material.

前記目的を達成すべく、本発明によるインサート成形品は、折れ部を有する金属インサートが繊維含有樹脂材に内包されているインサート成形品であって、折れ部の劣角側に切込みが形成されているものである。   In order to achieve the above object, an insert molded product according to the present invention is an insert molded product in which a metal insert having a folded portion is encapsulated in a fiber-containing resin material, and a cut is formed on the minor angle side of the folded portion. It is what.

金属インサートは、アルミや鉄などから形成され、ナット溝を具備するとともにその側面には、繊維含有樹脂材が入り込む溝を構成する複数の折れ部を備えている。   The metal insert is made of aluminum, iron, or the like, has a nut groove, and has a plurality of bent portions that form grooves into which the fiber-containing resin material enters on the side surface.

本発明のインサート成形品では、成形の際に繊維含有樹脂が入り込み難い折れ部の劣角側(その角度はたとえば90度程度)に切込みが形成されていることにより、繊維含有樹脂材を構成する樹脂がこの切込みに入り込み、繊維がこの樹脂の流動に追随し、本来的には入り難い折れ部の劣角側へ繊維が入り込むことができるため、繊維が折れ部の劣角側に十分に入り込まずに金属インサートと繊維含有樹脂材の間の接合強度が低下するといった課題が完全に解消される。   In the insert-molded product of the present invention, the fiber-containing resin material is configured by forming a cut on the inferior angle side (the angle is, for example, about 90 degrees) of the bent portion where the fiber-containing resin does not easily enter during molding. The resin penetrates into this notch, the fiber follows the flow of this resin, and the fiber can penetrate into the inferior angle side of the bent portion, which is essentially difficult to enter. The problem that the joint strength between the metal insert and the fiber-containing resin material is reduced is completely eliminated.

繊維含有樹脂材を構成する樹脂としては、エポキシ樹脂等の熱硬化性樹脂が挙げられる。また、繊維含有樹脂材に含まれている繊維には、短繊維や長繊維が適用できる。   Examples of the resin constituting the fiber-containing resin material include thermosetting resins such as epoxy resins. Moreover, a short fiber and a long fiber are applicable to the fiber contained in the fiber-containing resin material.

また、繊維含有樹脂材に含まれている繊維の素材としては、セラミック繊維、ガラス繊維や炭素繊維といった無機繊維、金属繊維、有機繊維のいずれか一種もしくは二種以上の混合材が挙げられる。   Examples of the fiber material contained in the fiber-containing resin material include ceramic fibers, inorganic fibers such as glass fibers and carbon fibers, metal fibers, and organic fibers, or a mixture of two or more.

また、折れ部の劣角側に形成される切込みの断面形状は、三角形、三角形以外の多角形、半円形、1/4円形、半楕円形、1/4楕円形などが挙げられる。   In addition, examples of the cross-sectional shape of the cut formed on the minor angle side of the bent portion include a triangle, a polygon other than a triangle, a semicircular shape, a 1/4 circular shape, a semielliptical shape, and a 1/4 elliptical shape.

また、切込みの深さは、0.3〜1.5mm程度がよく、0.5〜1.0mm程度が望ましい。   The depth of the cut is preferably about 0.3 to 1.5 mm, and preferably about 0.5 to 1.0 mm.

さらに、断面形状が三角形の切込みの場合、その先端の角度は30〜60度程度がよく、40〜50度程度が望ましい。30度未満の場合は樹脂が流れ込み難く、60度を超えると繊維が折れ部の劣角側に近づけなくなるためである。   Furthermore, when the cross-sectional shape is a triangular cut, the tip angle is preferably about 30 to 60 degrees, and preferably about 40 to 50 degrees. This is because if the angle is less than 30 degrees, the resin hardly flows in, and if the angle exceeds 60 degrees, the fibers cannot approach the inferior angle side of the bent portion.

以上の説明から理解できるように、本発明のインサート成形品によれば、金属インサートの有する折れ部の劣角側に切込みが形成されていることにより、繊維含有樹脂材を構成する樹脂がこの切込みに入り込み、繊維がこの樹脂の流動に追随し、本来的には入り難い折れ部の劣角側へ繊維が入り込むことができるため、もって金属インサートと繊維含有樹脂材の間の接合強度の高いインサート成形品を提供することができる。   As can be understood from the above description, according to the insert molded product of the present invention, the notch is formed on the inferior angle side of the bent portion of the metal insert, so that the resin constituting the fiber-containing resin material is the notch. Inserts with high bonding strength between the metal insert and the fiber-containing resin material because the fibers can follow the flow of this resin and the fibers can enter the inferior angle side of the folded portion, which is essentially difficult to enter. A molded article can be provided.

本発明のインサート成形品の実施の形態1の縦断面図である。It is a longitudinal cross-sectional view of Embodiment 1 of the insert molded product of this invention. 本発明のインサート成形品の実施の形態2の縦断面図である。It is a longitudinal cross-sectional view of Embodiment 2 of the insert molded product of this invention. 従来のインサート成形品の実施の形態の縦断面図である。It is a longitudinal cross-sectional view of embodiment of the conventional insert molded article.

以下、図面を参照して本発明のインサート成形品の実施の形態を説明する。   Hereinafter, an embodiment of an insert molded product of the present invention will be described with reference to the drawings.

(インサート成形品の実施の形態)
図1,2はそれぞれ、本発明のインサート成形品の実施の形態1、実施の形態2の縦断面図である。
(Embodiment of insert molded product)
1 and 2 are longitudinal sectional views of Embodiment 1 and Embodiment 2 of the insert molded product of the present invention, respectively.

図1で示すように、インサート成形品10は、側面に複数の折れ部を有する金属インサート1が繊維含有樹脂材2に内包されてその全体が構成されている。   As shown in FIG. 1, the insert molded product 10 includes a metal insert 1 having a plurality of bent portions on a side surface and is entirely contained in a fiber-containing resin material 2.

ここで、金属インサート1は、アルミニウムやその合金、鉄などから形成され、その中央にナット溝1aを具備するとともに、その側面には複数の折れ部を備えており、この折れ部によって繊維含有樹脂材2内でのアンカー効果が期待できる。   Here, the metal insert 1 is formed of aluminum, an alloy thereof, iron, or the like, and has a nut groove 1a at the center thereof, and has a plurality of bent portions on its side surface, and fiber-containing resin is formed by the bent portions. An anchor effect in the material 2 can be expected.

インサート成形品10において、金属インサート1の折れ部の劣角側1bには水平方向に延びる断面が三角形状の切込み1cが形成されている。なお、図1は縦断面図であることから、立体的には、略筒状の金属インサート1の側面の周方向に沿って断面三角形状の切込み1cが環状に形成されている。   In the insert molded product 10, a cut 1 c having a triangular cross section extending in the horizontal direction is formed on the minor angle side 1 b of the bent portion of the metal insert 1. In addition, since FIG. 1 is a longitudinal cross-sectional view, three-dimensionally, the notch 1c of the cross-sectional triangle shape is cyclically formed along the circumferential direction of the side surface of the substantially cylindrical metal insert 1.

切込み1cの先端の角度θは30〜60度程度が好ましく、40〜50度程度が望ましい。また、切込み1cの深さは、0.3〜1.5mm程度が好ましく、0.5〜1.0mm程度が望ましい。なお、この際の金属インサート1としては、高さ、幅がともに20mm、ナット溝1aの径が4mm程度の寸法のものが適用できる。   The angle θ of the tip of the cut 1c is preferably about 30 to 60 degrees, and preferably about 40 to 50 degrees. Further, the depth of the cut 1c is preferably about 0.3 to 1.5 mm, and more preferably about 0.5 to 1.0 mm. As the metal insert 1 in this case, a metal insert having a height and width of 20 mm and a diameter of the nut groove 1a of about 4 mm can be applied.

なお、切込み1cの断面形状は、三角形以外にも、四角形等の多角形、半円形、1/4円形、半楕円形、1/4楕円形などが挙げられる。   In addition to the triangle, the cross-sectional shape of the cut 1c includes a polygon such as a quadrangle, a semicircular shape, a 1/4 circular shape, a semielliptical shape, and a 1/4 elliptical shape.

なお、図2で示す実施の形態2にかかるインサート成形品10Aを構成する金属インサート1Aは、鉛直方向に延びる断面三角形状の切込み1dが形成されたものであり、その他の構成は図1で示すインサート成形品10と同様である。   The metal insert 1A constituting the insert molded product 10A according to the second embodiment shown in FIG. 2 is formed with a cut 1d having a triangular cross-section extending in the vertical direction, and the other structure is shown in FIG. This is the same as the insert molded product 10.

ここで、繊維含有樹脂材2に含まれる繊維2aには短繊維や長繊維が適用でき、ボロンやアルミナ、炭化ケイ素、窒化ケイ素、ジルコニアなどのセラミック繊維や、ガラス繊維や炭素繊維といった無機繊維、銅や鋼、アルミニウム、ステンレス等の金属繊維、ポリアミドやポリエステルなどの有機繊維のいずれか一種もしくは二種以上の混合材からなる繊維束から構成できる。   Here, short fibers and long fibers can be applied to the fibers 2a included in the fiber-containing resin material 2, ceramic fibers such as boron, alumina, silicon carbide, silicon nitride, zirconia, inorganic fibers such as glass fibers and carbon fibers, It can be comprised from the fiber bundle which consists of metallic fiber, such as copper, steel, aluminum, stainless steel, and organic fiber, such as polyamide and polyester, 1 type, or 2 or more types of mixed materials.

繊維含有樹脂材2は、エポキシ樹脂や不飽和ポリエステル樹脂、ビニルエステル樹脂などの熱硬化性樹脂内に上記素材の短繊維もしくは長繊維が含まれたものである。   The fiber-containing resin material 2 is a material in which short fibers or long fibers of the above materials are contained in a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, or a vinyl ester resin.

ここで、インサート成形品10,10Aの製造方法を概説する。   Here, the manufacturing method of the insert molded articles 10 and 10A will be outlined.

金属インサート1を不図示の成形型に収容する。   The metal insert 1 is accommodated in a mold (not shown).

次に、成形型に炭素繊維を含むシートモールディングコンパウンド(C-SMC)を配設し、プレス機で加圧しながら加熱成形することにより、インサート成形品10,10Aが製造される。   Next, a sheet molding compound (C-SMC) containing carbon fiber is disposed in the mold, and the molded articles 10 and 10A are manufactured by heat molding while pressing with a press.

なお、製造方法はこの方法以外にも、裁断された繊維材を含んだ溶融樹脂を成形型内に注入して成形する方法であってもよい。   In addition to this method, the manufacturing method may be a method in which a molten resin containing a cut fiber material is injected into a mold and molded.

図示するインサート成形品10,10Aによれば、成形の際に繊維含有樹脂に含有された繊維が本来的には入り込み難い折れ部の劣角側1bにおいて、切込み1c、1dが形成されていることにより、繊維含有樹脂材2を構成する樹脂がこの切込み1c、1dに入り込み、繊維2aがこの樹脂の流動に追随し、本来的には入り難い折れ部の劣角側1bへ繊維2aが入り込むことができるため、繊維が折れ部の劣角側に十分に入り込まずに金属インサートと繊維含有樹脂材の間の接合強度が低下するといった課題が完全に解消される。   According to the illustrated insert-molded products 10 and 10A, the cuts 1c and 1d are formed on the inferior angle side 1b of the bent portion where the fibers contained in the fiber-containing resin are inherently difficult to enter during molding. As a result, the resin constituting the fiber-containing resin material 2 enters the notches 1c and 1d, the fibers 2a follow the flow of the resin, and the fibers 2a enter the minor angle side 1b of the bent portion that is essentially difficult to enter. Therefore, the problem that the bonding strength between the metal insert and the fiber-containing resin material is lowered without the fibers sufficiently entering the inferior angle side of the bent portion is completely solved.

そして、折れ部の劣角側1bに繊維2aが十分に入り込んだ状態で金属インサート1,1Aと繊維含有樹脂材2の一体化が図られていることにより、アンカー効果が向上し、金属インサート1,1Aと繊維含有樹脂材2の間の接合強度が高いインサート成形品10,10Aとなる。   And since the integration of the metal inserts 1 and 1A and the fiber-containing resin material 2 in a state where the fibers 2a have sufficiently entered into the minor angle side 1b of the bent portion, the anchor effect is improved, and the metal insert 1 , 1A and the fiber-containing resin material 2 are the insert molded products 10 and 10A having high bonding strength.

以上、本発明の実施の形態を図面を用いて詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

1,1A…金属インサート、1a…ナット溝、1b…折れ部の劣角側、1c、1d…切込み、2…繊維含有樹脂材、2a…繊維、10,10A…インサート成形品   DESCRIPTION OF SYMBOLS 1,1A ... Metal insert, 1a ... Nut groove, 1b ... Inferior angle side of bent part, 1c, 1d ... Cut, 2 ... Fiber-containing resin material, 2a ... Fiber, 10, 10A ... Insert molded product

Claims (1)

折れ部を有する金属インサートが繊維含有樹脂材に内包されているインサート成形品であって、
折れ部の劣角側に切込みが形成されているインサート成形品。
An insert molded product in which a metal insert having a bent portion is included in a fiber-containing resin material,
An insert-molded product in which a cut is formed on the inferior angle side of the fold.
JP2014008654A 2014-01-21 2014-01-21 insert molding Pending JP2015136828A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017155833A (en) * 2016-03-01 2017-09-07 大陽ステンレススプリング株式会社 Insert bush

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