JP3969636B2 - Skin-integrated resin molded product and manufacturing method thereof - Google Patents

Skin-integrated resin molded product and manufacturing method thereof Download PDF

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Publication number
JP3969636B2
JP3969636B2 JP2002003563A JP2002003563A JP3969636B2 JP 3969636 B2 JP3969636 B2 JP 3969636B2 JP 2002003563 A JP2002003563 A JP 2002003563A JP 2002003563 A JP2002003563 A JP 2002003563A JP 3969636 B2 JP3969636 B2 JP 3969636B2
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Japan
Prior art keywords
skin
base material
resin
molded product
integrated
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Expired - Lifetime
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JP2002003563A
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Japanese (ja)
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JP2003205523A (en
Inventor
秀和 大池
実 平岡
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株式会社豊和化成
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  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、アームレスト、コンソールリッド等の自動車用内装品として用いられる、樹脂製の基材の表面に表皮材を被覆した複雑な形状の表皮一体樹脂成形品及びその製造法に関するものである。
【0002】
【従来の技術】
上記のような複雑な形状をした表皮一体樹脂成形品の従来の製造方法は、下記の通りである。先ず図6に示すように、下型51のキャビティ内に表皮材61をその周縁部61aがキャビティの外に張出すようにセットし、次に発泡樹脂原料62を表皮材61の内面に充填する。その後合成樹脂製の基材63をセットした上型52を下型51に型合わせしたうえ、加熱して発泡樹脂原料を発泡させ、図7に示すように基材63と表皮材61とを接合一体化したものを製造する。この状態では表皮材61の周縁部61aは基材63の周囲に張出しているので、その後、図8に示すように表皮材61の周縁部61aを基材63の裏側に巻き込みながら接着剤を塗布して接着固定する。
【0003】
ところがこのような従来法では、表皮材61の周縁部61aを基材63の裏側に巻き込む際にコーナー部分に皺が発生し易い。そのために周縁部61aを細い幅に切断しながら巻き込んだり、余剰部分を縫い込んだりする縁取り処理を人手により行なっているため、非常に多くの手数と時間とを要するという問題があった。また、巻き込み接着作業の際に接着剤がはみ出して表皮材61の表面に付着し、不良品を発生させることがあるうえ、接着剤から発生する有機溶剤が作業環境を悪化させるという問題もあった。
【0004】
【発明が解決しようとする課題】
本発明は上記した従来の問題点を解決し、コーナー部分に皺のない外観のよい表皮一体樹脂成形品を提供するとともに、そのような表皮一体樹脂成形品を人手による縁取り処理を必要とせず、また接着剤を使用することなく作業性よく製造することができる方法を提供するためになされたものである。
【0005】
【課題を解決するための手段】
上記の課題を解決するためになされた本発明の表皮一体樹脂成形品は、周縁部にゴムひもを伸長させて縫製するシャーリング加工が施された表皮材が、周縁部のゴムの伸縮性を利用して樹脂製の基材の表面に被覆され、該表皮材と基材がそれらの間に注入された発泡樹脂により接合一体化されていることを特徴とするものである。
【0006】
また上記の課題を解決するためになされた本発明の表皮一体樹脂成形品の製造方法は、周縁部にゴムひもを伸長させて縫製するシャーリング加工を施した表皮材を周縁部のゴムの伸縮性を利用して樹脂製の基材の表面に被覆し、この基材を金型本体の下型のキャビティにセットしたうえ該基材の裏面から基材の表面と表皮材との間に発泡樹脂原料を充填し、その後に上型を下型に型合わせして金型本体内で該発泡樹脂原料を加熱発泡させ、基材と表皮材との間を接合一体化することを特徴とするものである。
【0007】
本発明によれば、周縁部にゴムひもを伸長させて縫製するシャーリング加工を施した表皮材を周縁部のゴムの伸縮性を利用して樹脂製の基材の表面に被覆し、基材と表皮材との間を発泡樹脂により接合一体化するので、表皮材はゴムひもにより自然に基材の内側に巻き込まれ、表皮材の周縁部の後処理は不要である。また、表皮材は周縁部のゴムひもの伸縮性を利用して基材の表面に被覆されているから、表皮材の表面側周縁のコーナーは皺を発生することなく綺麗に仕上がった製品を得ることができる。さらに表皮材と基材との接着は発泡樹脂により行なわれ接着剤を使用しないので、接着剤が表皮材に付着することによる不良発生や、接着剤の溶剤による作業環境の悪化も防止することができる。
【0008】
【発明の実施の形態】
次に、本発明の実施形態を図1〜図5を参照しつつ説明する。この実施形態の表皮一体樹脂成形品はドア装着用のアームレストであるが、本発明はこれに限定されるものではなく、コンソールリッド等の自動車用内装品にも広く適用することができる。
【0009】
図1は実施形態の表皮一体樹脂成形品の一部切斜視図、図2はその背面を示す斜視図、図3は基材の斜視図、図4は表皮材2の斜視図、図5は成形状態の説明図である。
図3に示される1は裏面側に取付用ボス11を形成して所定形状に成形されているポリプロピレン等の樹脂製の基材、図4に示される2は基材1の表面全体を被覆する布、レザークロス等よりなる表皮材である。基材1の裏面には適当なサイズの中空部13が突設されており、その底面には樹脂注入孔12が形成されている。
【0010】
表皮材2は基材1の表面よりも十分に大きく、基材1の裏面にまで回り込ませることができる周縁部21を持つ。図4に示すように、この周縁部21の少なくともコーナー部分には、ゴムひも22を伸長させたうえ縫製してなるシャーリング加工が施してある。図4の例ではシャーリング加工を皺が発生し易いコーナー部分にのみ施したが、周縁部21の全体に亘って行ってもよいことはいうまでもない。
【0011】
そして、このような表皮材2を周縁部21のゴムひも22の伸縮性を利用して、基材1の表面に図2に示すように被覆する。この作業はごく容易に行なうことができる。次に、表皮材2を被覆した基材1を図5に示すように金型本体5の下型51のキャビティにセットしたうえ、基材1の裏面に形成された中空部13の樹脂注入孔12から、基材1の表面と表皮材2との間に発泡樹脂原料31例えば未発泡のウレタン樹脂原料を矢印に示すように充填する。
【0012】
続いて上型52を下型51に型合わせし、金型本体5を加熱して注入された発泡樹脂原料を発泡させて基材1と表皮材2との間に発泡樹脂3(発泡ウレタン樹脂)を充満させると同時に、基材1と表皮材2とを接合一体化させる。なお、発泡樹脂原料31が均等に行き渡るように、中空部13の容量や形状を設定するものとする。このように発泡樹脂原料31を金型のキャビティ内で発泡させるため、外形状は正確に成形される。また発泡樹脂原料31が外部に漏れ出して不良品となることもない。
【0013】
このようにして、図1に示すような表皮一体樹脂成形品であるアームレストを得ることができる。この表皮一体樹脂成形品は、車に取り付けたときに車室内に露出する表面には皺が全く表れることがなく、外観に優れたものである。しかも本発明の製造方法によれば、従来のような縁取り処理が不要となる。
【0014】
【発明の効果】
以上に説明したように、請求項1の発明の表皮一体樹脂成形品は、シャーリング加工を施してなる表皮材を周縁部のゴムの伸縮性を利用して基材の表面に被覆し、発泡樹脂により接合一体化したものであるから、コーナー部分等に皺が発生することがなく、外観に優れたものである。
【0015】
また請求項2の発明の表皮一体樹脂成形品の製造法によれば、従来多くの手数を必要としていた縁取り処理をなくすることができるから、作業性が向上し、大幅なコストダウンを図ることができる利点がある。しかも従来のように接着剤を使用しないため、接着剤が表皮材に付着することによる不良品の発生や、接着剤から発生する有機溶剤による作業環境の悪化も防止することができる。
【図面の簡単な説明】
【図1】実施形態の表皮一体樹脂成形品を示す一部切斜視図である。
【図2】実施形態の表皮一体樹脂成形品の背面を示す一部切斜視図である。
【図3】基材を裏面側から示す斜視図である。
【図4】表皮材を裏面側から示す斜視図である。
【図5】本発明の製造工程の説明図である。
【図6】従来例の製造工程の説明図である。
【図7】従来例の製造工程の説明図である。
【図8】従来の表皮一体樹脂成形品の一例を示す斜視図である。
【符号の説明】
1 基材
2 表皮材
3 発泡樹脂
5 金型本体
12 樹脂注入孔
13 中空部
21 周縁部
22 ゴムひも
31 発泡樹脂原料
51 下型
52 上型
61 表皮材
61a 周縁部
62 発泡樹脂原料
63 基材
[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a skin-integrated resin molded product having a complex shape in which a surface of a resin base material is coated on a surface of a resin base material used as an automobile interior product such as an armrest and a console lid, and a manufacturing method thereof.
[0002]
[Prior art]
The conventional manufacturing method of the skin-integrated resin molded product having a complicated shape as described above is as follows. First, as shown in FIG. 6, the skin material 61 is set in the cavity of the lower mold 51 so that the peripheral edge portion 61 a extends outside the cavity, and then the foamed resin raw material 62 is filled into the inner surface of the skin material 61. . Thereafter, the upper mold 52 on which the synthetic resin base 63 is set is matched with the lower mold 51, and the foamed resin raw material is foamed by heating to join the base 63 and the skin 61 as shown in FIG. An integrated product is manufactured. In this state, the peripheral edge portion 61a of the skin material 61 is projected around the base material 63, and thereafter the adhesive is applied while the peripheral edge portion 61a of the skin material 61 is wound around the back side of the base material 63 as shown in FIG. And fix it.
[0003]
However, in such a conventional method, when the peripheral edge portion 61a of the skin material 61 is wound around the back side of the base material 63, wrinkles are likely to occur at the corner portion. For this reason, since the peripheral portion 61a is wound while being cut into a thin width, and the edging process for sewing the surplus portion is performed manually, there is a problem that much time and labor are required. In addition, the adhesive sticks out and adheres to the surface of the skin material 61 during the wrap-up bonding work, which may cause a defective product, and the organic solvent generated from the adhesive deteriorates the working environment. .
[0004]
[Problems to be solved by the invention]
The present invention solves the above-described conventional problems and provides a skin-integrated resin molded product having a good appearance without a wrinkle at the corner portion, and does not require manual edging treatment for such a skin-integrated resin molded product, Further, the present invention has been made to provide a method that can be manufactured with good workability without using an adhesive.
[0005]
[Means for Solving the Problems]
The skin-integrated resin molded product of the present invention, which has been made to solve the above problems, utilizes a stretchable rubber material at the periphery of the skin material that has been subjected to shirring to stretch and sew a rubber string at the periphery. Then, the surface of the resin base material is coated, and the skin material and the base material are joined and integrated by the foamed resin injected between them.
[0006]
In addition, the manufacturing method of the skin-integrated resin molded product of the present invention made to solve the above-mentioned problem is that the skin material subjected to shirring that stretches and sews a rubber string at the peripheral portion is stretchable of the rubber at the peripheral portion. Is applied to the surface of the base material made of resin, this base material is set in the lower mold cavity of the mold body, and the foamed resin is formed between the back surface of the base material and the surface of the base material. It is characterized by filling the raw material, then matching the upper mold with the lower mold, heating and foaming the foamed resin raw material in the mold body, and joining and integrating the base material and the skin material It is.
[0007]
According to the present invention, the surface of the base material made of resin is coated on the surface of the base material made of resin using the stretchability of the rubber at the peripheral edge, and the outer skin material subjected to the shirring process that stretches and sews the elastic cord at the peripheral edge. Since the skin material is joined and integrated with the foamed resin, the skin material is naturally wound inside the base material by the rubber string, and the post-treatment of the peripheral portion of the skin material is unnecessary. In addition, since the skin material is coated on the surface of the base material by utilizing the elasticity of the rubber band at the peripheral edge, the corner on the surface side peripheral edge of the skin material can be obtained with a beautiful finish without generating wrinkles. be able to. Furthermore, since the adhesion between the skin material and the base material is performed with a foamed resin and no adhesive is used, it is possible to prevent the occurrence of defects due to the adhesive adhering to the skin material and the deterioration of the working environment due to the solvent of the adhesive. it can.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. The skin-integrated resin molded product of this embodiment is an armrest for mounting a door, but the present invention is not limited to this, and can be widely applied to automobile interior products such as a console lid.
[0009]
1 is a partially cut perspective view of a skin-integrated resin molded product according to an embodiment, FIG. 2 is a perspective view showing the back surface thereof, FIG. 3 is a perspective view of a base material, FIG. 4 is a perspective view of a skin material 2, and FIG. It is explanatory drawing of a shaping | molding state.
3 shown in FIG. 3 is a base material made of resin such as polypropylene formed with a mounting boss 11 on the back side and molded into a predetermined shape, and 2 shown in FIG. 4 covers the entire surface of the base material 1. A skin material made of cloth, leather cloth or the like. A hollow portion 13 having an appropriate size is projected on the back surface of the substrate 1, and a resin injection hole 12 is formed on the bottom surface.
[0010]
The skin material 2 has a peripheral edge 21 that is sufficiently larger than the surface of the base material 1 and can be wound around the back surface of the base material 1. As shown in FIG. 4, at least a corner portion of the peripheral edge portion 21 is subjected to a shearing process in which a rubber string 22 is stretched and sewn. In the example of FIG. 4, the shearing process is performed only on the corner portion where wrinkles are likely to occur, but it goes without saying that it may be performed over the entire peripheral edge portion 21.
[0011]
Then, such a skin material 2 is coated on the surface of the base material 1 as shown in FIG. 2 using the stretchability of the rubber cord 22 of the peripheral edge portion 21. This work can be done very easily. Next, the base material 1 coated with the skin material 2 is set in the cavity of the lower mold 51 of the mold body 5 as shown in FIG. 5, and the resin injection hole of the hollow portion 13 formed on the back surface of the base material 1. 12, a foamed resin raw material 31, for example, an unfoamed urethane resin raw material is filled between the surface of the substrate 1 and the skin material 2 as indicated by an arrow.
[0012]
Subsequently, the upper mold 52 is matched with the lower mold 51, the mold body 5 is heated to foam the injected foamed resin material, and the foamed resin 3 (foamed urethane resin) is formed between the base material 1 and the skin material 2. At the same time, the base material 1 and the skin material 2 are joined and integrated. In addition, the capacity | capacitance and shape of the hollow part 13 shall be set so that the foamed resin raw material 31 may spread evenly. Since the foamed resin raw material 31 is foamed in the cavity of the mold in this way, the outer shape is accurately formed. Further, the foamed resin raw material 31 does not leak out and become a defective product.
[0013]
In this way, an armrest which is a skin-integrated resin molded product as shown in FIG. 1 can be obtained. This skin-integrated resin molded product has excellent appearance without any wrinkles appearing on the surface exposed to the interior of the vehicle when attached to the vehicle. Moreover, according to the manufacturing method of the present invention, the conventional edging process becomes unnecessary.
[0014]
【The invention's effect】
As explained above, the skin-integrated resin molded product of the invention of claim 1 is a foamed resin in which the surface of a base material is coated with a skin material subjected to shearing using the stretchability of rubber at the peripheral edge. Therefore, wrinkles are not generated at the corners and the like, and the appearance is excellent.
[0015]
In addition, according to the manufacturing method of the skin-integrated resin molded product of the invention of claim 2, since it is possible to eliminate the edging process that has conventionally required a lot of work, the workability is improved and the cost is greatly reduced. There is an advantage that can be. In addition, since no adhesive is used as in the prior art, it is possible to prevent the occurrence of defective products due to the adhesive adhering to the skin material and the deterioration of the working environment due to the organic solvent generated from the adhesive.
[Brief description of the drawings]
FIG. 1 is a partially cut perspective view showing a skin-integrated resin molded product of an embodiment.
FIG. 2 is a partially cut perspective view showing a back surface of the skin-integrated resin molded product of the embodiment.
FIG. 3 is a perspective view showing a base material from the back side.
FIG. 4 is a perspective view showing the skin material from the back side.
FIG. 5 is an explanatory diagram of the production process of the present invention.
FIG. 6 is an explanatory diagram of a manufacturing process of a conventional example.
FIG. 7 is an explanatory diagram of a manufacturing process of a conventional example.
FIG. 8 is a perspective view showing an example of a conventional skin-integrated resin molded product.
[Explanation of symbols]
1 Base material 2 Skin material 3 Foamed resin 5 Mold body
12 Resin injection hole
13 Hollow part
21 Edge
22 Elastic band
31 Foam resin raw material
51 Lower mold
52 Upper mold
61 Skin material
61a Perimeter
62 Raw material for foamed resin
63 Base material

Claims (2)

周縁部にゴムひもを伸長させて縫製するシャーリング加工が施された表皮材が、周縁部のゴムの伸縮性を利用して樹脂製の基材の表面に被覆され、該表皮材と基材がそれらの間に注入された発泡樹脂により接合一体化されていることを特徴とする表皮一体樹脂成形品。A skin material with a shirring process that stretches and sews a rubber cord at the peripheral edge is coated on the surface of a resin base material by utilizing the elasticity of the rubber at the peripheral edge. A skin-integrated resin molded product characterized by being integrally joined by a foamed resin injected between them. 周縁部にゴムひもを伸長させて縫製するシャーリング加工を施した表皮材を周縁部のゴムの伸縮性を利用して樹脂製の基材の表面に被覆し、この基材を金型本体の下型のキャビティにセットしたうえ該基材の裏面から基材の表面と表皮材との間に発泡樹脂原料を充填し、その後に上型を下型に型合わせして金型本体内で該発泡樹脂原料を加熱発泡させ、基材と表皮材との間を接合一体化することを特徴とする表皮一体樹脂成形品の製造法。Cover the surface of the resin base material using the elastic property of the rubber at the peripheral part, and apply the base material to the bottom of the mold body. Set in the cavity of the mold and fill the foam resin material between the surface of the base material and the skin material from the back side of the base material, then match the upper mold to the lower mold and foam the foam in the mold body A method for producing a skin-integrated resin molded product, characterized in that a resin raw material is heated and foamed, and a base material and a skin material are joined and integrated.
JP2002003563A 2002-01-10 2002-01-10 Skin-integrated resin molded product and manufacturing method thereof Expired - Lifetime JP3969636B2 (en)

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JP3969636B2 true JP3969636B2 (en) 2007-09-05

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