JP2893896B2 - Molding method of electromagnetic shielding resin outer plate - Google Patents
Molding method of electromagnetic shielding resin outer plateInfo
- Publication number
- JP2893896B2 JP2893896B2 JP22668590A JP22668590A JP2893896B2 JP 2893896 B2 JP2893896 B2 JP 2893896B2 JP 22668590 A JP22668590 A JP 22668590A JP 22668590 A JP22668590 A JP 22668590A JP 2893896 B2 JP2893896 B2 JP 2893896B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum foil
- resin
- outer plate
- molding
- mold
- 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
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Superstructure Of Vehicle (AREA)
- Body Structure For Vehicles (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、合成樹脂製外板に電磁シールド性をもたせ
た樹脂外板の成形方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for molding a resin outer plate having a synthetic resin outer plate having electromagnetic shielding properties.
自動車の外板用として従来は鋼板が使用されていた
が、近時使用者の個性化に対応するため、また、コスト
的に有利な合成樹脂成形品が採用されるようになり、ガ
ラス繊維強化の熱硬化性樹脂が一般に使用される。この
ガラス繊維強化熱硬化性樹脂としては、不飽和ポリエス
テル樹脂にガラス繊維を含浸させシート状にした「シー
トモールディングコンパウンド」（SMCという）材料が
主として使用されるが、熱可塑性ポリマー等もフェンダ
ー、エンジンフード等に使用されるようになった。Conventionally, steel plates have been used for automobile outer panels.However, in order to respond to the individualization of users in recent years, cost-effective synthetic resin molded products have been adopted, and glass fiber reinforced Is generally used. As the glass fiber reinforced thermosetting resin, a sheet molding compound (SMC) made by impregnating unsaturated polyester resin with glass fiber is mainly used, but thermoplastic polymers are also used for fenders and engines. It has come to be used in foods and the like.
この樹脂製部品を例えば自動車のエンジンフードに使
用した場合、樹脂製エンジンフードは電磁波をシールド
することができないため、エンジンルーム内の電子機器
の誤作動やラジオ雑音等の電磁波障害が発生する。When this resin component is used, for example, in an engine hood of an automobile, the resin engine hood cannot shield electromagnetic waves, so that electromagnetic waves such as malfunction of electronic devices in the engine room and radio noise occur.
この対策として、樹脂製エンジンフードにアルミ箔を
接合した製品が開発されている。この製品は、第６図
（Ａ）に示すように、樹脂製エンジンフードの成形の際
に、成形用下型１に平なアルミ箔５を敷き、その状にSM
Cシート４を載せて上型２を閉じ、所定の温度と圧力を
加えて成形すると共に、樹脂成形品にアルミ箔５を密着
するようにしている。As a countermeasure, products in which aluminum foil is bonded to a resin engine hood have been developed. As shown in FIG. 6 (A), when this product is molded into a resin engine hood, a flat aluminum foil 5 is laid on the lower mold 1 for molding, and the SM is formed in that shape.
The upper die 2 is closed with the C sheet 4 placed thereon, molded by applying a predetermined temperature and pressure, and the aluminum foil 5 is brought into close contact with the resin molded product.
ところがこの成形品は、第６図（Ｂ）に示すように、
アルミ箔５とSMCシート４の樹脂層4aとが平面接触し、
この接触面の分子間の接合力だけで接着しているので、
接着強度が不足して使用中にアルミ箔５が剥がれてしま
うことがある。また、アルミ箔５の強度不足から、成形
時に樹脂の流動のためアルミ箔５が破れることもある。However, as shown in FIG. 6 (B),
The aluminum foil 5 and the resin layer 4a of the SMC sheet 4 make planar contact,
Since it is bonded only by the bonding force between molecules on this contact surface,
The aluminum foil 5 may come off during use due to insufficient bonding strength. Also, due to insufficient strength of the aluminum foil 5, the aluminum foil 5 may be broken due to the flow of resin during molding.
接着強度の増強対策として、第７図に示すようにアル
ミ箔６に多数の孔6aを開け、成形時に樹脂4aが孔の裏側
に張出すようにし、このアンカー効果によりアルミ箔６
と樹脂層４との接着強度を向上させている。As shown in FIG. 7, a number of holes 6a are formed in the aluminum foil 6 so that the resin 4a extends over the back of the hole during molding.
And the resin layer 4 is improved in adhesive strength.
また、特開昭59−50870号公報、特開昭61−249877号
公報では、第９図（Ａ）に示すように、SMCシート7,8の
間に多数の孔6aを開けたアルミ箔６を挟んで下型１にセ
ットして成形し、この成形品では、第９図（Ｂ）に示す
ように、アルミ箔６を挟んでセットされた両側のSMCシ
ート7,8の樹脂が、孔6aの部分で接合するようにしたも
のが提案されている。In Japanese Patent Application Laid-Open Nos. 59-50870 and 61-249877, as shown in FIG. 9 (A), an aluminum foil 6 having a large number of holes 6a formed between SMC sheets 7 and 8 is disclosed. The molded product is set in the lower die 1 with the aluminum foil 6 interposed therebetween, as shown in FIG. 9 (B). One that is joined at the portion of 6a has been proposed.
更に、実開昭62−154913号公報では、金型表面に規則
的に複数のシボを配設し、このシボの平面長さを樹脂に
混入する金属繊維の長さより小さくし、この金型で金属
繊維を混入した合成樹脂を成形し、成形品の表面に金属
繊維が露出しないようにした導電性プラスチックの成形
用金型が提案されている。Further, in Japanese Utility Model Application Laid-Open No. 62-154913, a plurality of embosses are regularly arranged on the surface of a mold, and the plane length of the emboss is made smaller than the length of the metal fiber mixed into the resin. There has been proposed a mold for molding a conductive plastic in which a synthetic resin mixed with a metal fiber is molded so that the metal fiber is not exposed on the surface of the molded article.
第７図に示すアンカー効果によりアルミ箔６と樹脂層
４との接着強度を向上させたものでは、アルミ箔６に多
数の孔6aを設けるためアルミ箔６の強度が不足する。こ
のため、第８図に示すように、成形の際にアルミ箔６の
孔ａ〜ｄに縦横方向に伸長する力が加わると、アルミ箔
６がａ−d,b−ｃ及びａ−b,d−ｃ間で破断し、成形品に
導電性不良を生ずる。第９図に示す成形方法による成形
品の場合も同様である。In the case where the adhesive strength between the aluminum foil 6 and the resin layer 4 is improved by the anchor effect shown in FIG. 7, the strength of the aluminum foil 6 is insufficient because a large number of holes 6a are provided in the aluminum foil 6. For this reason, as shown in FIG. 8, when a force that extends in the vertical and horizontal directions is applied to the holes a to d of the aluminum foil 6 during molding, the aluminum foil 6 becomes ad, bc and ab, It breaks between d and c, causing poor conductivity in the molded product. The same applies to a molded product by the molding method shown in FIG.
また、前記実開昭62−154913号公報に記載されたもの
では、樹脂に混入された金属繊維が相互に確実に接触す
るとは限らず、導電不良を生ずることがある。Further, in Japanese Unexamined Utility Model Publication No. 62-154913, the metal fibers mixed into the resin do not always come into contact with each other with certainty, and poor conductivity may occur.
本発明は上記問題点を解決し、樹脂製外板の成形の際
にアルミ箔等の導電部材を強固に接合させると共に、導
電部材の破断を防止して樹脂製外板に電磁シールド性を
確実に付与する樹脂外板の成形方法を提供することを目
的とするものである。The present invention solves the above-mentioned problems, and firmly joins a conductive member such as an aluminum foil at the time of forming a resin outer plate, and prevents the conductive member from being broken, thereby ensuring electromagnetic shielding of the resin outer plate. It is an object of the present invention to provide a method of forming a resin outer plate to be applied to a resin.
本発明は、外板の裏面を成形する金型のほぼ全表面に
浅い凹凸を形成し、該金型にアルミ箔とSMCシートを重
ねてセットし、所定の温度で加圧成形して前記アルミ箔
を樹脂に接合する電磁シールド性樹脂外板の成形方法で
ある。The present invention provides a mold for forming a rear surface of an outer plate, which has shallow irregularities formed on almost the entire surface, sets an aluminum foil and an SMC sheet on the mold, and press-molds at a predetermined temperature to form the aluminum. This is a method of forming an electromagnetic shielding resin outer plate for joining a foil to a resin.
成形時の初期に、軟化したSMCシートの樹脂がアルミ
箔を金型の浅い凹凸に押し付けてこれに馴染むように変
形させ、アルミ箔を動かないように固定された後に樹脂
が流動して成形されるのでアルミ箔は成形時に破断する
ことがなく、また、成形された外板のアルミ箔と樹脂と
の接合面積が増加するので両者は充分な接着力で接着す
る。In the early stage of molding, the softened resin of the SMC sheet presses the aluminum foil against the shallow irregularities of the mold and deforms it to conform to it, and after the aluminum foil is fixed so that it does not move, the resin flows and is molded. Therefore, the aluminum foil is not broken at the time of molding, and the bonding area between the aluminum foil and the resin of the formed outer plate increases, so that both are adhered with a sufficient adhesive force.
本発明の実施例を図面について説明する。 Embodiments of the present invention will be described with reference to the drawings.
第１図は自動車のエンジンフードの成形に本発明を適
用した場合を示すもので、第１図はチャージ状態を示す
金型の断面図、第２図は成形時の拡大断面を示し、第３
図は成形品の斜視図でる。FIG. 1 shows a case where the present invention is applied to molding of an engine hood of an automobile, FIG. 1 is a sectional view of a mold showing a charged state, FIG.
The figure is a perspective view of a molded product.
波状の凹凸３を形成した下型１に平なアルミ箔５をセ
ットし、その上にSMCシート４を重ね、上型２を降下さ
せて型締めし、所定の温度と圧力を加えて成形する。こ
の場合、第１図に示すように、SMCシート４のチャージ
率をできるだけ大とする。A flat aluminum foil 5 is set on the lower mold 1 on which the wavy irregularities 3 are formed, an SMC sheet 4 is laid thereon, the upper mold 2 is lowered, the mold is clamped, and molding is performed by applying a predetermined temperature and pressure. . In this case, as shown in FIG. 1, the charge rate of the SMC sheet 4 is made as large as possible.
成形時に加熱により軟化したSMCシート４の樹脂が、
第２図の矢印に示すように流動してアルミ箔５を下型１
の波状の凹凸３に押し付け、アルミ箔を波形5Aに変形さ
せると同時にSCMシート４の樹脂がアルミ箔5Aに接着す
る。この際、上型２で加圧されたSMCシート４は成形の
初期においてアルミ箔５を下型１の波状の凹凸３に押し
付けて馴染み、その後樹脂が水平方向に流動しても、波
形のアルミ箔5Aは動かないので、このアルミ箔5Aを切断
することはない。The resin of the SMC sheet 4 softened by heating during molding,
The aluminum foil 5 is flowed as shown by the arrow in FIG.
The aluminum foil is pressed against the wavy irregularities 3 to deform the aluminum foil into a waveform 5A, and at the same time, the resin of the SCM sheet 4 adheres to the aluminum foil 5A. At this time, the SMC sheet 4 pressurized by the upper mold 2 is adapted to the aluminum mold 5 by pressing the aluminum foil 5 against the corrugated irregularities 3 of the lower mold 1 in the initial stage of molding. Since the foil 5A does not move, the aluminum foil 5A is not cut.
成形後、型から取り出した成形品は、第３図に示すよ
うに波状アルミ箔5Aと樹脂４との接合面積が増加し、充
分な接着力で接着する。After molding, the molded product taken out of the mold has an increased bonding area between the corrugated aluminum foil 5A and the resin 4, as shown in FIG. 3, and adheres with a sufficient adhesive force.
成形されたエンジンフードは、裏面のアルミ箔5Aがヒ
ンジ取付部で電気的に接続するようにし、この樹脂製エ
ンジンフードを車体に取付けたときに、ヒンジを介して
鋼板製車体側へ導通させる。The molded engine hood is electrically connected to the aluminum foil 5A on the back surface at a hinge attachment portion, and when this resin engine hood is attached to the vehicle body, it is conducted to the steel plate body via the hinge.
次に別の実施例について説明する。 Next, another embodiment will be described.
第４図に示すように、下型１のほぼ全表面に多数の円
形の浅いシボ13を規則的に形成する。この下型１を用い
て先の実施例と同様にして平なアルミ箔５とSMCシート
４を重ねて成形する。As shown in FIG. 4, a large number of circular shallow embossments 13 are regularly formed on almost the entire surface of the lower mold 1. Using this lower mold 1, a flat aluminum foil 5 and an SMC sheet 4 are laminated and formed in the same manner as in the previous embodiment.
成形時の初期に、アルミ箔５が下方に流動する軟化樹
脂で下型１のシボ13に押し付けられてシボ13に馴染んで
第５図の5Bのように変形して固定され、その後に樹脂が
水平方向に流動して成形されるので、この実施例の場合
もアルミ箔5Bが切断されることなく、成形品のアルミ箔
5Bと樹脂４との接合面積が増加して充分な接着力で接着
する。In the initial stage of molding, the aluminum foil 5 is pressed against the grain 13 of the lower mold 1 with a softening resin flowing downward, adapts to the grain 13 and is deformed and fixed as shown by 5B in FIG. In this embodiment, the aluminum foil 5B is not cut because the aluminum foil 5B is cut in the horizontal direction.
The bonding area between the resin 5B and the resin 4 increases, and the resin 4 is bonded with a sufficient bonding force.
シボの形状は円形に限らず、浅い凹凸を形成する任意
の形状とすることができ、また、以上の実施例では、エ
ンジンフードの例について述べたが、他の成形品にも適
用できるのは勿論である。The shape of the grain is not limited to a circle, but may be any shape that forms shallow irregularities.Although in the above embodiments, the example of the engine hood has been described, it is applicable to other molded products. Of course.
本発明は、樹脂外板の成形時に電磁シールド性を付与
するための導電部材が破断するおそれがなく、また、成
形後は導電部材が強固に樹脂層に接着され、樹脂外板に
電磁シールド性を確実に付与することができる効果があ
る。According to the present invention, there is no possibility that the conductive member for providing the electromagnetic shielding property is broken at the time of molding the resin outer plate, and after the molding, the conductive member is firmly adhered to the resin layer, and the electromagnetic shielding property is applied to the resin outer plate. Has an effect of being able to be surely given.
第１図はチャージ状態を示す金型の断面図、第２図は成
形時の拡大断面、第３図は成形品の斜視図、第４図は他
の実施例のチャージ状態を示す金型の断面図、第５図は
成形時の拡大断面図、第６図ないし第９図は従来技術を
示し、第６図（Ａ）はチャージ状態を示す金型の断面
図、第６図（Ｂ）は成形品の斜視図、第７図は成形品の
断面図、第８図は孔開きアルミ箔に生ずる応力の説明
図、第９図（Ａ）はチャージ状態を示す金型の断面図、
第９図（Ｂ）は成形品の断面図でる。 1:下型、2:上型 3:波状の凹凸、4:SMCシート 5:アルミ箔、13:シボ1 is a sectional view of a mold showing a charged state, FIG. 2 is an enlarged sectional view at the time of molding, FIG. 3 is a perspective view of a molded product, and FIG. 4 is a view of the mold showing a charged state of another embodiment. FIG. 5 is an enlarged sectional view at the time of molding, FIGS. 6 to 9 show a prior art, FIG. 6 (A) is a sectional view of a mold showing a charged state, and FIG. 6 (B). 7 is a perspective view of the molded article, FIG. 7 is a sectional view of the molded article, FIG. 8 is an explanatory view of stress generated in the perforated aluminum foil, FIG. 9 (A) is a sectional view of a mold showing a charged state,
FIG. 9 (B) is a sectional view of the molded product. 1: Lower mold, 2: Upper mold 3: Wavy irregularities, 4: SMC sheet 5: Aluminum foil, 13: Texture
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｈ０５Ｋ 9/00 Ｈ０５Ｋ 9/00 Ｂ２９Ｋ 105:06 Ｂ２９Ｌ 31:34 (72)発明者 中川 栄一 神奈川県藤沢市土棚８番地 株式会社い すゞ中央研究所内 (72)発明者 山下 徳郎 神奈川県藤沢市土棚８番地 株式会社い すゞ中央研究所内 (72)発明者 田中 洋祐 神奈川県藤沢市土棚８番地 株式会社い すゞ中央研究所内 (56)参考文献 特開 平３−68660（ＪＰ，Ａ) 特開 平３−129897（ＪＰ，Ａ) 特開 昭62−275878（ＪＰ，Ａ) 特開 平１−278854（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B62D 25/00 - 29/04 H05K 9/00 Continuation of the front page (51) Int.Cl. 6 Identification code FI // H05K 9/00 H05K 9/00 B29K 105: 06 B29L 31:34 (72) Inventor Eiichi Nakagawa Eighteen trellis 8 Fujisawa-shi, Kanagawa Prefecture Co., Ltd. Inside Isuzu Central Research Laboratory (72) Inventor Tokuro Yamashita 8 Dosana, Fujisawa-shi, Kanagawa Prefecture Isuzu Central Research Laboratory Co., Ltd. (72) Inventor Yosuke Tanaka 8 Dosana, Fujisawa-shi, Kanagawa Prefecture, Japan Isuzu Central Research Institute ( 56) References JP-A-3-68660 (JP, A) JP-A-3-129897 (JP, A) JP-A-62-275878 (JP, A) JP-A-1-278854 (JP, A) ) Field surveyed (Int. Cl. 6 , DB name) B62D 25/00-29/04 H05K 9/00
Claims (1)
浅い凹凸を形成し、該金型にアルミ箔とSMCシートを重
ねてセットし、所定の温度で加圧成形して前記アルミ箔
を樹脂に接合することを特徴とする電磁シールド性樹脂
外板の成形方法。1. A mold for molding a back surface of an outer plate is formed with shallow irregularities on almost the entire surface, an aluminum foil and an SMC sheet are set on the mold, and the molded body is pressed and formed at a predetermined temperature. A method of forming an electromagnetically shielding resin outer plate, comprising bonding an aluminum foil to a resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22668590A JP2893896B2 (en) | 1990-08-30 | 1990-08-30 | Molding method of electromagnetic shielding resin outer plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22668590A JP2893896B2 (en) | 1990-08-30 | 1990-08-30 | Molding method of electromagnetic shielding resin outer plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04110278A JPH04110278A (en) | 1992-04-10 |
| JP2893896B2 true JP2893896B2 (en) | 1999-05-24 |
Family
ID=16849052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22668590A Expired - Lifetime JP2893896B2 (en) | 1990-08-30 | 1990-08-30 | Molding method of electromagnetic shielding resin outer plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2893896B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202000021787A1 (en) | 2020-09-15 | 2022-03-15 | Persico Spa | PRESSING PROCESS OF A VEHICLE BATTERY CONTAINER |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166848A (en) * | 2010-12-29 | 2011-08-31 | 中兴通讯股份有限公司 | Electromagnetic shielding composite material and preparation method thereof |
| JP6757628B2 (en) * | 2016-08-30 | 2020-09-23 | 三井化学株式会社 | Method for manufacturing metal / fiber reinforced resin composite structure and metal / fiber reinforced resin composite structure |
-
1990
- 1990-08-30 JP JP22668590A patent/JP2893896B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202000021787A1 (en) | 2020-09-15 | 2022-03-15 | Persico Spa | PRESSING PROCESS OF A VEHICLE BATTERY CONTAINER |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04110278A (en) | 1992-04-10 |
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