JP2001353746A - Method for manufacturing multilayered molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a multilayered molded article excellent in strength by integrally laminating two kinds of skin materials on the surface of a thermoplastic resin base mateial in adjacent relationship in a certainly bonded state at a low cost without generating the positional shift of two kinds of the skin materials. SOLUTION: A mold having a skin material grasping member for mutually grasping the end parts of two kinds of the skin materials and a fitting groove in which the grasping member is fitted is used and, at first, the end parts of two kinds of the skin materials are superposed one upon another to be grasped by the skin material grasping member and this grasping member is fitted in the fitting groove provided in the mold to fix the skin materials and a molten thermoplastic resin is supplied to the gap between the skin mateials and the surface of the mold on the side where the skin material grasping member is fitted to manufacture the multilayered molded article wherein the two kinds of the skin materials are integrally laminated on the surface of the base material comprising the thermoplastic resin in adjacent relationship. The end parts of two kinds of the skin materials are grasped by the skin material grasping part through a resin stop plate.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は熱可塑性樹脂からな
る基材表面に２種類の表皮材が隣接して貼合されてなる
多層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 producing a multilayer molded product in which two kinds of skin materials are adhered adjacent to the surface of a base material made of a thermoplastic resin.

【０００２】[0002]

【従来の技術】熱可塑性樹脂からなる基材の表面に表皮
材が貼合された多層成形品は、その経済性、軽量性およ
び良好な賦形性から自動車内装部品（例えばドアトリム
やインストルメントパネル）、家電製品の内外装部品そ
の他の広い分野で多く使用されており、近年、このよう
な多層成形品の中でも２種類の表皮材が隣接して貼合さ
れた多層成形品は意匠性に優れるため多く使用されるよ
うになってきた。2. Description of the Related Art Multilayer molded products in which a skin material is bonded to the surface of a base material made of a thermoplastic resin are used for automobile interior parts (for example, door trims and instrument panels) because of their economical efficiency, light weight and good shapeability. ), Are widely used in interior and exterior parts of home appliances and other wide fields. In recent years, among such multilayer molded products, a multilayer molded product in which two kinds of skin materials are pasted together is excellent in design. It has come to be used a lot.

【０００３】従来、このような熱可塑性樹脂基材の表面
に２種類の表皮材が隣接して貼合された層成形品の製造
方法としては、射出成形や圧縮成形により熱可塑性樹脂
基材表面に単一の表皮材を貼合した部品を２種類別々に
成形し、これらを後工程で熱融着等で接合させる方法が
知られている。[0003] Conventionally, as a method for producing a layer molded product in which two kinds of skin materials are bonded adjacent to the surface of such a thermoplastic resin substrate, injection molding or compression molding has been used. There is known a method in which two types of parts having a single skin material bonded thereto are separately formed, and these are joined in a later step by heat fusion or the like.

【０００４】また、他の方法としては、射出成形や圧縮
成形により基材表面に部分的に１種類の表皮材を貼合し
た成形体を製造し、後工程で接着剤等を用いて別の表皮
材を貼りあわせる方法が知られている。As another method, a molded product in which one type of skin material is partially adhered to the surface of a base material by injection molding or compression molding is manufactured, and another molded product is formed using an adhesive or the like in a later step. A method of attaching a skin material is known.

【０００５】しかし、このような方法で多層成形品を製
造した場合には、例えば前者の方法による場合には２種
類の基材同士の接合が部分的な融着であり、接合強度が
不十分となる場合がある。また、後者の場合には表皮材
の剥がれ等の問題がある。[0005] However, when a multilayer molded product is manufactured by such a method, for example, in the case of the former method, the bonding between the two types of base materials is partial fusion, and the bonding strength is insufficient. It may be. In the latter case, there is a problem such as peeling of the skin material.

【０００６】これらの問題に対して、例えば、予め２種
類の表皮材の端部同士を重ねあわせて挟持体に挟持し
（図２（ａ）、（ｂ）、（ｃ））、これを金型面に設け
た嵌合溝にセットして溶融状熱可塑性樹脂を供給し成形
する方法が提案されている（特開平２―１７５１１
１）。尚、図２（ａ）は2種類の表皮材（２、３）を挟
持体（７）に挟持したときの状態を示す表皮材側からの
概略図であり、図２（b）は図２（ａ）におけるＢ−Ｂ
を切断したときの断面を、図２（ｃ）は図２（ａ）にお
けるＣ−Ｃを切断したときの断面をそれぞれ示してい
る。[0006] To solve these problems, for example, the ends of two kinds of skin materials are overlapped with each other and sandwiched by a sandwiching body (FIGS. 2A, 2B, and 2C). A method has been proposed in which a molten thermoplastic resin is set in a fitting groove provided in a mold surface and supplied and molded (JP-A-2-17511).
1). FIG. 2A is a schematic view from the skin material side showing a state in which two types of skin materials (2, 3) are sandwiched by the sandwiching body (7), and FIG. BB in (a)
2 (c) shows a cross section taken along the line CC in FIG. 2 (a).

【０００７】この方法によれば２種類の表皮材が同時に
貼合一体化でき、しかも製品強度や表皮材の剥離等の問
題のない良好な多層成形品を製造することが可能となる
が、この方法による場合には図３に示すように、溶融樹
脂の供給または賦形時に溶融樹脂の表皮材合縁部への到
達タイミングがずれた時等に表皮材の合縁部の位置がず
れ易く、図４に示すような合縁部のラインが蛇行した外
観の好ましくない製品となってしまうという問題があ
る。According to this method, two types of skin materials can be simultaneously bonded and integrated, and a good multilayer molded product free from problems such as product strength and peeling of the skin material can be manufactured. In the case of using the method, as shown in FIG. 3, the position of the edge of the skin material is likely to shift when the timing of the molten resin reaching the edge of the skin material is shifted during supply or shaping of the molten resin, There is a problem that the line at the edge as shown in FIG. 4 becomes an undesirable product having a meandering appearance.

【０００８】[0008]

【発明が解決しようとする課題】このようなことから、
本発明者らは製品強度や表皮材の接着強度に問題がな
く、しかも隣接する２種類の表皮材の合縁部の位置ずれ
もなく、外観の良好な多層成形品を低コストで製造する
方法について検討の結果、本発明に至った。SUMMARY OF THE INVENTION
The present inventors have a method for producing a multilayer molded product having a good appearance without any problem in the product strength or the adhesive strength of the skin material, and without displacement of the joining portion of two adjacent skin materials at a low cost. As a result of the investigation, the present invention was reached.

【０００９】[0009]

【課題を解決するための手段】本発明は、２種類の表皮
材の端部同士を挟持する表皮材挟持体とこの挟持体を嵌
合する嵌合溝を有する金型を用いて、まず２種類の表皮
材の端部同士を重ね合わせて表皮材挟持体に挟持させ、
この挟持体を金型内に設けた嵌合溝に嵌合して表皮材を
固定し、表皮材と表皮材挟持体を嵌合した側の金型面と
の間に溶融状熱可塑性樹脂を供給して、熱可塑性樹脂か
らなる基材の表面に２種類の表皮材を隣接して貼合一体
化する多層成形品の製造方法であって、表皮材挟持部に
２種類の表皮材のそれぞれの端部同士を樹脂止め板を介
して挟持することを特徴とする多層成形品の製造方法を
提供するものである。SUMMARY OF THE INVENTION According to the present invention, there are firstly used a mold having a skin material holding body for holding the ends of two kinds of skin materials together and a fitting groove for fitting the holding material. Overlapping the ends of the kinds of skin materials and sandwiching them with the skin material holding body,
This holding body is fitted into the fitting groove provided in the mold to fix the skin material, and a molten thermoplastic resin is filled between the skin material and the mold surface on the side where the skin material holding body is fitted. A method for producing a multilayer molded product comprising supplying and bonding two types of skin materials adjacently to a surface of a base material made of a thermoplastic resin, wherein each of the two types of skin materials is provided in a skin material holding portion. And a method for manufacturing a multilayer molded product characterized in that the end portions are sandwiched via a resin stopper plate.

【００１０】[0010]

【発明の実施の形態】以下、本発明を図面に基づいて説
明するが、以下の説明は本発明の一例であり、本発明が
これに限定されるものではない。図１は本発明の方法に
より製造された多層成形品（１）の例であって、図１−
（ａ）は表皮材側から見た平面図を、図１−（ｂ）は図
１−（ａ）のＡ−Ａを切断したときの断面図を示してい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings, but the following description is an example of the present invention and the present invention is not limited thereto. FIG. 1 shows an example of a multilayer molded article (1) manufactured by the method of the present invention.
(A) is a plan view seen from the skin material side, and FIG. 1- (b) is a cross-sectional view taken along line AA of FIG. 1- (a).

【００１１】この多層成形品（１）は、熱可塑性樹脂基
材（４）の表面に第一の表皮材（２）と第二の表皮材
（３）が隣接して貼合一体化されており、隣り合う表皮
材の端部同士は互いに重なり合って成形品内部に潜り込
む形態となっている。This multilayer molded article (1) is obtained by laminating and adhering a first skin material (2) and a second skin material (3) adjacent to the surface of a thermoplastic resin substrate (4). In addition, the ends of adjacent skin materials overlap each other and sunk into the molded product.

【００１２】図５は本発明の方法に用いる金型例の概略
断面図であり、この金型は雄型（５）の外周部と雌型
（６）の内周部が摺動面となって相互に摺動する雄雌一
対からなっており、雄型（５）は２種類の表皮材の端部
同士を挟持する挟持体（７）と、この挟持体を嵌合する
嵌合溝（８）を有しているとともに溶融樹脂供給通路
（１０）を介して溶融樹脂口（１１、１２）が開口して
いる。この溶融樹脂供給口は少なくとも一方の表皮材貼
合部に対応する箇所にあればよいが、好ましくは２種類
の表皮材の貼合部それぞれに対応する箇所に設けるのが
よく、製品形状や大きさに応じてその数、位置を決定す
ればよい。FIG. 5 is a schematic sectional view of an example of a mold used in the method of the present invention. In this mold, an outer peripheral portion of a male mold (5) and an inner peripheral portion of a female mold (6) are sliding surfaces. The male die (5) has a holding member (7) for holding the ends of two kinds of skin materials together, and a fitting groove (7) for fitting the holding member. 8) and the molten resin ports (11, 12) are opened via the molten resin supply passage (10). The molten resin supply port may be provided at a location corresponding to at least one of the skin material bonding portions, but is preferably provided at a location corresponding to each of the two types of skin material bonding portions. The number and position may be determined accordingly.

【００１３】次にこのような金型を用いて多層成形品を
製造する方法について説明する。図６（ａ）、（ｂ）
は、第一の表皮材（２）と第二の表皮材（３）の端部同
士の間に樹脂止め板（９）を介して挟持体（７）に挟持
しているところを断面概略図で示している。両表皮材
（２、３）の端部同士は成形時に位置ずれを起こさない
程度に挟持、固定されていればよく、表皮材の合縁部を
図６（ａ）のように挟持している部分と図６（ｂ）のよ
うに挟持していない部分の組み合わせにしてもよいし、
合縁部すべてを図８（ａ）のように挟持してもよい。Next, a method of manufacturing a multilayer molded product using such a mold will be described. FIGS. 6A and 6B
Is a schematic cross-sectional view showing a state in which the end portions of the first skin material (2) and the second skin material (3) are sandwiched by a sandwiching body (7) via a resin stopper plate (9). Indicated by. The ends of the two skin materials (2, 3) need only be sandwiched and fixed to the extent that they do not shift during molding, and the edges of the skin materials are sandwiched as shown in FIG. 6 (a). It may be a combination of a part and a part which is not held as shown in FIG.
The entire edge may be sandwiched as shown in FIG.

【００１４】樹脂止め板（９）は第一の表皮材と第二の
表皮材の端部同士の間に挟まれていることが必要であ
り、樹脂供給時や賦形時に２種類の表皮材合縁部に樹脂
が到達するタイミングがずれた場合であっても動かない
ことが必要である。このため、樹脂止め板はこれらの溶
融樹脂流動時の圧力に耐えられるだけの強度を持ったも
のであることが要求されるが、材質は金属製、樹脂製な
ど特に制限されるものではない。The resin stopper plate (9) needs to be sandwiched between the ends of the first skin material and the second skin material. When the resin is supplied or shaped, two types of skin materials are used. It is necessary that the resin does not move even when the timing at which the resin reaches the joint edge is shifted. For this reason, the resin stopper plate is required to have strength enough to withstand the pressure during the flow of the molten resin, but the material is not particularly limited, such as metal or resin.

【００１５】樹脂止め板の厚みについては、それが大き
すぎる場合には隣接する表皮材合縁部に隙間が生じ易く
なるためできるだけ厚みの小さいことが好ましく、厚み
を小さくすることにより表皮材合縁部における隙間が小
さくなり、好ましい外観の成形品が得られる。又、樹脂
止め板の幅（図６における高さに相当）はできるだけ大
きい方が樹脂止め効果が発現されるが、幅が大きすぎる
と製品の表面に樹脂止め板が見えて外観を損ねてしまう
ため、製品表面にでないようにしつつ、できるだけ大き
くすることが好ましい。When the thickness of the resin stopper plate is too large, it is preferable to make the thickness as small as possible because a gap is likely to be formed at the edge of the adjacent skin material. The gap in the portion is reduced, and a molded article having a preferable appearance is obtained. The width of the resin stopper plate (corresponding to the height in FIG. 6) is as large as possible to achieve the resin stopper effect. However, if the width is too large, the resin stopper plate can be seen on the surface of the product to impair the appearance. Therefore, it is preferable to increase the size as much as possible while keeping the product from being on the product surface.

【００１６】かかる樹脂止め板は隣接する２種類の表皮
材の合縁部全てに連続的に介することが好ましいが、製
品形状や大きさ等に応じて、非連続的に介した形態であ
ってもよい。It is preferable that such a resin stopper plate is continuously interposed at all of the edges of two adjacent skin materials, but is discontinuously interposed depending on the product shape and size. Is also good.

【００１７】図７は２種類の表皮材（２、３）の端部同
士を樹脂止め板（９）を介して挟持した挟持体（７）
を、雄型（５）に設けた嵌合溝（８）に嵌合した状態を
示している。この時、雄型（５）の外周部に設けた表皮
材クランプ枠（図示せず）などにより、表皮材の他端外
周部を固定してもよい。FIG. 7 shows a holding body (7) in which the ends of two kinds of skin materials (2, 3) are held between resin stopper plates (9).
In the fitting groove (8) provided in the male mold (5). At this time, the outer peripheral portion of the other end of the skin material may be fixed by a skin material clamp frame (not shown) provided on the outer peripheral portion of the male mold (5).

【００１８】図８は、金型間にセットした表皮材（２、
３）と雄型（５）との間に、溶融状熱可塑性樹脂（１
３）を金型内の樹脂供給通路（１０）を介して溶融樹脂
供給口（１１、１２）から供給したところを示してい
る。この時、雌雄両金型は未閉鎖状態にある。FIG. 8 shows a skin material (2, 2) set between molds.
3) between the male mold (5) and the molten thermoplastic resin (1).
3) shows a state where the molten resin is supplied from the molten resin supply ports (11, 12) through the resin supply passage (10) in the mold. At this time, the male and female dies are not closed.

【００１９】溶融状熱可塑性樹脂（１３）を供給すると
きの雄雌金型のキャビティクリアランスは使用する表皮
材の種類によって適宜決定される。また、２種類の表皮
材が貼合される箇所それぞれから溶融状熱可塑性樹脂を
供給する場合、それぞれの溶融樹脂供給口から供給する
樹脂量やタイミングは成形品の大きさや形状に応じて適
宜決定される。The cavity clearance of the male and female molds when supplying the molten thermoplastic resin (13) is appropriately determined depending on the type of skin material used. When the molten thermoplastic resin is supplied from each of the portions where the two kinds of skin materials are bonded, the amount and timing of the resin supplied from each molten resin supply port are appropriately determined according to the size and shape of the molded product. Is done.

【００２０】図９は溶融状熱可塑性樹脂の供給後、型締
めをしている途中での状態を示したものであり、第一の
表皮材側の溶融状熱可塑性樹脂と第二の表皮材側の溶融
状熱可塑性樹脂が２種類の表皮材の合縁部に到達するタ
イミングが異なった状態となっているが、これら２種類
の表皮材は樹脂止め板（９）を介して挟持体に挟持され
ているため、一方の表皮材側（図では表皮材２側）の溶
融状熱可塑性樹脂が早く合縁部に到達しても樹脂止め板
（９）により確実に樹脂の流れを停止させることができ
るため、表皮材の合縁部の位置がずれることなく型締め
が可能となる。FIG. 9 shows a state in which the mold is being clamped after the supply of the molten thermoplastic resin. The molten thermoplastic resin on the first skin material side and the second skin material are shown. The timing at which the molten thermoplastic resin on the side reaches the edge of the two types of skin materials is different, but these two types of skin materials are attached to the holding body via the resin stopper plate (9). Since it is sandwiched, even if the molten thermoplastic resin on one skin material side (skin material 2 side in the figure) reaches the joint portion quickly, the resin stopper plate (9) surely stops the flow of the resin. Therefore, the mold can be clamped without shifting the position of the edge of the skin material.

【００２１】型締めのタイミングは溶融状熱可塑性樹脂
（１３）を供給しながらまたは供給完了後のどちらであ
ってもよい。尚、溶融状熱可塑性樹脂（１３）の供給完
了後に型締めを行なう際には、供給完了後速やかに型締
めを開始することが好ましい。また、雌雄両金型の型締
めは、図では縦方向の例を示しているが、型締め方向は
縦方向であっても横方向であってもよい。The timing of the mold clamping may be either during the supply of the molten thermoplastic resin (13) or after the supply is completed. When the mold clamping is performed after the supply of the molten thermoplastic resin (13) is completed, it is preferable that the mold clamping be started immediately after the supply is completed. In addition, the mold clamping of the male and female molds is illustrated in a vertical direction in the drawing, but the mold clamping direction may be a vertical direction or a horizontal direction.

【００２２】図１０は型締めが完了したときの状態を示
しており、図１０（ａ）は表皮材を挟持している部分
の、図１０（ｂ）は表皮材を挟持していない部分での型
締めをした状態をそれぞれ示しており、２種類の表皮材
の合縁部の位置がずれることなく賦形されている。FIG. 10 shows a state in which the mold clamping is completed. FIG. 10 (a) shows a portion where the skin material is sandwiched, and FIG. 10 (b) shows a portion where the skin material is not sandwiched. , Respectively, in which the shape of the edge portion of the two kinds of skin materials is shaped without shifting.

【００２３】この後、冷却・固化を行い、雌雄両金型を
開放することにより表皮材の合縁部の位置ずれのない外
観の好ましい成形品が取出される。Thereafter, the molded product is cooled and solidified, and the male and female molds are opened to take out a molded product having a preferable appearance without displacement of the mating portion of the skin material.

【００２４】このような本発明に適用される表皮材とし
ては、モケットやトリコット等の織物や編み物、ニード
ルパンチカーペット等の不織布、金属フォイルや熱可塑
性樹脂及び熱可塑性エラストマーのシートまたはフィル
ムがあげられる。これらの表皮材は必要に応じて発泡層
や裏打ち層が適宜積層された２層あるいは３層以上とし
た積層表皮材であってもよいが、基材となる熱可塑性樹
脂と熱融着可能なもの、あるいは表皮材裏面に溶融状態
の熱可塑性樹脂が含浸して基材樹脂部分と接着可能なも
のであることが必要である。Examples of the skin material applicable to the present invention include woven or knitted fabrics such as moquettes and tricots, nonwoven fabrics such as needle punched carpets, and sheets or films of metal foils, thermoplastic resins and thermoplastic elastomers. . These skin materials may be two or three or more laminated skin materials in which a foam layer and a backing layer are appropriately laminated as necessary, but can be heat-fused with a thermoplastic resin as a base material. It is necessary that the material or the back surface of the skin material is impregnated with a thermoplastic resin in a molten state and can be bonded to the base resin portion.

【００２５】上記の積層表皮材の場合の場合の発泡層と
しては、ポリプロピレンやポリエチレンなどのポリオレ
フィンの発泡体や、ポリ塩化ビニル発泡体、軟質あるい
は半硬質のポリウレタン発泡体が用いらる。As the foam layer in the case of the above-mentioned laminated skin material, a foam of a polyolefin such as polypropylene or polyethylene, a foam of polyvinyl chloride, or a soft or semi-rigid polyurethane foam is used.

【００２６】また、裏打ち層としては、不織布や合成樹
脂シートやフィルムなどが用いられる。不織布を構成す
る繊維としては、綿、毛、絹、麻等の天然繊維あるいは
ポリアミド、ポリエステル、ナイロン等の合成繊維が使
用でき、これらを単独であるいは混紡して種々の方法に
より不織布としたものが用いられる。例えばニードルパ
ンチ式、サーマルボンド式、スパンボンド式、メルトブ
ロー式、スパンレース式等の不織布があげられる。合成
樹脂からなるシートやフィルムとしては、ポリプロピレ
ンやポリエチレン等の熱可塑性樹脂やポリオレフィン系
熱可塑性エラストマーのシートやフィルムがあげられ、
基材樹脂として使用される熱可塑性樹脂と融着性のある
ものが用いられる。As the backing layer, a nonwoven fabric, a synthetic resin sheet, a film or the like is used. As the fibers constituting the nonwoven fabric, natural fibers such as cotton, wool, silk, hemp or synthetic fibers such as polyamide, polyester, nylon and the like can be used. Used. For example, non-woven fabrics such as a needle punch type, a thermal bond type, a spun bond type, a melt blow type, a spun lace type and the like can be mentioned. Examples of the sheet or film made of a synthetic resin include a thermoplastic resin such as polypropylene or polyethylene and a sheet or film of a polyolefin-based thermoplastic elastomer,
A thermoplastic resin used as the base resin is used.

【００２７】本発明に適用される熱可塑性樹脂としては
圧縮成形、射出成形、押出成形などで通常使用される樹
脂であり、たとえばポリプロピレン、ポリエチレン、ア
クリロニトリルースチレンーブタジエンブロック共重合
体、ポリスチレン、ナイロンなどのポリアミド、ポリ塩
化ビニル、ポリカーボネート、アクリル樹脂、スチレン
ーブタジエンブロック共重合体などの一般的な熱可塑性
樹脂、ＥＰＭやＥＰＤＭなどの熱可塑性エラストマー、
これらの混合物、あるいはこれらを用いたポリマーアロ
イ等があげられ、これらは非発泡性であっても発泡性で
あってもよい。また、これらの熱可塑性樹脂には必要に
応じて通常使用されるガラス繊維、各種の無機もしくは
有機フィラーなどの充填材が含有されていてもよく、も
ちろん通常使用される各種の顔料、滑材、帯電防止剤、
安定剤などの各種添加材が配合されていてもよい。The thermoplastic resin used in the present invention is a resin usually used in compression molding, injection molding, extrusion molding, etc., for example, polypropylene, polyethylene, acrylonitrile styrene butadiene block copolymer, polystyrene, nylon General thermoplastic resins such as polyamide, polyvinyl chloride, polycarbonate, acrylic resin, styrene-butadiene block copolymer, thermoplastic elastomers such as EPM and EPDM,
Examples thereof include a mixture thereof, and a polymer alloy using the same, and these may be non-foamable or foamable. In addition, these thermoplastic resins may contain fillers such as commonly used glass fibers and various inorganic or organic fillers, if necessary.Of course, various pigments and lubricants that are commonly used, Antistatic agent,
Various additives such as a stabilizer may be blended.

【００２８】本発明の多層成形品に適用される成形方法
としては、射出成形や圧縮成形が適用されるが、射出成
形の場合には、樹脂供給時に表皮材に溶融樹脂の温度や
圧力が直接かかり、表皮材へのダメージが大きくなる傾
向があるため、溶融状熱可塑性樹脂の供給後に型締めを
行うことにより、表皮材へのダメージを小さくできる圧
縮成形がより好ましく適用される。As a molding method applied to the multilayer molded article of the present invention, injection molding or compression molding is applied. In the case of injection molding, the temperature and pressure of the molten resin are directly applied to the skin material during resin supply. Since the damage to the skin material tends to increase, compression molding that can reduce the damage to the skin material is more preferably applied by performing mold clamping after supplying the molten thermoplastic resin.

【００２９】[0029]

【発明の効果】本発明の方法によれば、熱可塑性樹脂基
材の表面に2種類の表皮材を隣接して貼合一体化した場
合であっても、製品強度や表皮材の接着強度に問題がな
く、しかも２種類の表皮材の位置ずれのない多層成形品
を効率よく低コストで製造することができる。According to the method of the present invention, even when two kinds of skin materials are bonded and integrated adjacently to the surface of the thermoplastic resin base material, the product strength and the adhesion strength of the skin material are reduced. A multilayer molded product having no problem and having no displacement between two kinds of skin materials can be efficiently manufactured at low cost.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の方法により得られる多層成形品の例を
概略図で示したものであり、（ａ）は表皮材側から見た
平面図を、（ｂ）は図１（ａ）のＡ−Ａ断面図を示す。FIG. 1 is a schematic view showing an example of a multilayer molded product obtained by the method of the present invention, wherein (a) is a plan view seen from a skin material side, and (b) is a plan view of FIG. 1 (a). FIG.

【図２】従来法により多層成形品を得る場合の表皮材の
挟持方法を示したものであって、（ａ）は表皮材の端部
同士を重ねて挟持体に挟持したときの状態を示す表皮材
側からの概略図であり、（ｂ）は図２（ａ）のＢ−Ｂ断
面図を、（ｃ）は図２（ａ）のＣ−Ｃ断面図を示す。FIG. 2 shows a method of sandwiching a skin material when a multilayer molded product is obtained by a conventional method, and FIG. 2 (a) shows a state in which the ends of the skin material are overlapped and sandwiched by a sandwiching body. It is the schematic from the skin material side, (b) shows BB sectional drawing of FIG.2 (a), (c) shows CC sectional drawing of FIG.2 (a).

【図３】従来法による場合の、溶融樹脂の供給又は賦形
持における溶融樹脂の流動状態を示す。FIG. 3 shows a flow state of the molten resin during supply or shaping of the molten resin according to a conventional method.

【図４】従来法により得られる多層成形品を概略図で示
したものであり、（ａ）は表皮材側から見た平面図を、
（ｂ）は図４（ａ）のＢ−Ｂ断面図を示す。FIG. 4 is a schematic view showing a multilayer molded product obtained by a conventional method, wherein (a) is a plan view seen from a skin material side,
FIG. 4B is a sectional view taken along line BB of FIG.

【図５】本発明の方法に用いる金型例の概略断面図であ
る。FIG. 5 is a schematic sectional view of an example of a mold used in the method of the present invention.

【図６】本発明の方法により多層成形品を得る場合の表
皮材の挟持方法を示したものであって、図６（ａ）は表
皮材挟持体のうち表皮材を挟持している部分を、図６
（ｂ）は表皮材を挟持していない部分を、それぞれの断
面図で示したものである。FIG. 6 shows a method of sandwiching a skin material when a multilayer molded product is obtained by the method of the present invention. FIG. 6 (a) shows a portion of the skin material sandwiching body that sandwiches the skin material. , FIG.
(B) is a cross-sectional view of a portion where the skin material is not sandwiched.

【図７】本発明の方法において、樹脂止め板を介して表
皮材の端部同士を重ね合せて挟持した挟持体を金型の挟
持体嵌合溝に嵌合した状態を金型断面図で示したもので
ある。FIG. 7 is a cross-sectional view of a mold in which a holding body in which ends of a skin material are overlapped and held via a resin stopper plate in a method of the present invention is fitted into a holding body fitting groove of a mold. It is shown.

【図８】本発明の製造方法において、溶融状熱可塑性樹
脂を供給する工程を示す金型断面概略図である。FIG. 8 is a schematic sectional view of a mold showing a step of supplying a molten thermoplastic resin in the production method of the present invention.

【図９】本発明の製造方法において、型締め工程を示す
金型断面概略図である。FIG. 9 is a schematic sectional view of a mold showing a mold clamping step in the manufacturing method of the present invention.

【図１０】本発明の製造方法において、型締め完了後の
状態を示す金型断の概略図であり、（ａ）は挟持体で表
皮材を挟持している部分の、（ｂ）は表皮材を挟持して
いない部分を示している。FIG. 10 is a schematic view of a die cut showing a state after completion of mold clamping in the manufacturing method of the present invention, where (a) shows a portion where a skin material is held by a holding body, and (b) shows a skin. The portion where the material is not sandwiched is shown.

【符号の説明】[Explanation of symbols]

１：多層成形品 ２：第一の表皮材 ３：第二の表皮材 ４：熱可塑性樹脂基材 ５：雄型 ６：雌型 ７：挟持体 ８：嵌合溝 ９：樹脂止め板 １０：溶融樹脂供給通路 １１：溶融樹脂供給口 １２：溶融樹脂供給口 １３：溶融状熱可塑性樹脂 1: Multi-layer molded product 2: First skin material 3: Second skin material 4: Thermoplastic resin base material 5: Male type 6: Female type 7: Clamp body 8: Fitting groove 9: Resin stopper plate 10: Molten resin supply passage 11: Molten resin supply port 12: Molten resin supply port 13: Molten thermoplastic resin

フロントページの続き Ｆターム(参考） 4F202 AA04 AA11 AD08 AD17 AD20 AD35 AG03 AH23 CA11 CB01 CB12 CB13 CB20 CK25 CQ01 CQ05 4F206 AA04 AA11 AD08 AD17 AD20 AD35 AG03 AH23 JA07 JB12 JB13 JB20 JF05 JQ81 Continued on the front page F term (reference) 4F202 AA04 AA11 AD08 AD17 AD20 AD35 AG03 AH23 CA11 CB01 CB12 CB13 CB20 CK25 CQ01 CQ05 4F206 AA04 AA11 AD08 AD17 AD20 AD35 AG03 AH23 JA07 JB12 JB13 JB20 JF05 JQ81

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】２種類の表皮材の端部同士を挟持する表皮
材挟持体とこの挟持体を嵌合する嵌合溝を有する金型を
用いて、まず２種類の表皮材の端部同士を重ね合わせて
表皮材挟持体に挟持させ、この挟持体を金型内に設けた
嵌合溝に嵌合して表皮材を固定し、表皮材と表皮材挟持
体を嵌合した側の金型面との間に溶融状熱可塑性樹脂を
供給して、熱可塑性樹脂からなる基材の表面に２種類の
表皮材を隣接して貼合一体化する多層成形品の製造方法
であって、表皮材挟持部に２種類の表皮材のそれぞれの
端部同士を樹脂止め板を介して挟持することを特徴とす
る多層成形品の製造方法。An end of two kinds of skin materials is firstly joined by using a skin material holding body for holding the ends of two kinds of skin materials and a mold having a fitting groove for fitting the holding body. Are superimposed and sandwiched by a skin material holding body, and this holding body is fitted into a fitting groove provided in a mold to fix the skin material, and the metal on the side where the skin material and the skin material holding body are fitted is fitted. A method for producing a multilayer molded product in which a molten thermoplastic resin is supplied between a mold surface and a surface material of a thermoplastic resin, and two types of skin materials are bonded and integrated adjacent to each other, A method for manufacturing a multilayer molded product, comprising clamping each end of two kinds of skin materials to a skin material holding portion via a resin stopper plate. 【請求項２】未閉鎖状態にある雌雄両金型のうちのいず
れか一方の金型面に設けた嵌合溝に、２種類の表皮材の
端部同士を挟持した表皮材挟持体を嵌合して表皮材を固
定したのち、表皮材と表皮材挟持体を嵌合した側の金型
面との間に溶融状熱可塑性樹脂を供給し、型締めをして
熱可塑性樹脂からなる基材の表面に２種類の表皮材を隣
接して貼合一体化することを特徴とする請求項１に記載
の多層成形品の製造方法。2. A skin material holding body which holds the ends of two types of skin materials in a fitting groove provided on one of the male and female molds in an unclosed state. After fixing the skin material, the molten thermoplastic resin is supplied between the skin material and the mold surface on the side where the skin material holding body is fitted, and the mold is clamped to form a base made of the thermoplastic resin. The method for producing a multilayer molded article according to claim 1, wherein two kinds of skin materials are bonded and integrated adjacent to the surface of the material.