JP2010089285A - Method for producing composite molded article - Google Patents

Method for producing composite molded article Download PDF

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JP2010089285A
JP2010089285A JP2008258970A JP2008258970A JP2010089285A JP 2010089285 A JP2010089285 A JP 2010089285A JP 2008258970 A JP2008258970 A JP 2008258970A JP 2008258970 A JP2008258970 A JP 2008258970A JP 2010089285 A JP2010089285 A JP 2010089285A
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mold
molding surface
molding
molded product
skin
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Hitoshi Tsuda
斎 津田
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Toyota Boshoku Corp
Toyota Motor Corp
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Toyota Boshoku Corp
Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To produce a composite molded article without generation of a crease or tear on an outer skin by preventing the outer skin from separating from a mold surface of a molding mold. <P>SOLUTION: A method for producing a composite molded article 50 in which a substrate 52 (a second molded article) and outer skin 54 (a first molded article) are integrated, includes: a first molding step in which the outer skin 54 is molded between a concave first mold surface S1 and a convex second mold surface S2; and a second molding step in which the substrate 52 is foam molded between the outer skin 54 held in the first mold surface S1 and a convex third mold surface S3. A gradient θ1 to a mold releasing direction of the first mold surface S1 is set smaller than a gradient θ2 to a mold releasing direction of the second mold surface S2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、第１成形品と第２成形品とが一体化された複合成形品の製造方法に関する。   The present invention relates to a method for manufacturing a composite molded product in which a first molded product and a second molded product are integrated.

従来、第１成形品と第２成形品とが一体化された複合成形品の製造方法として、下記特許文献１に記載の製造方法が知られている。この製造方法では、まず、固定金型と可動金型との間に１次溶融樹脂を射出して第１成形品である表皮を成形する。つぎに、可動金型を固定金型から離間させてキャビティの容積を拡大させるとともに、その拡大したキャビティ内に２次溶融樹脂を射出して第２成形品である基材を成形している。   Conventionally, a manufacturing method described in Patent Document 1 below is known as a manufacturing method of a composite molded product in which a first molded product and a second molded product are integrated. In this manufacturing method, first, a primary molten resin is injected between a fixed mold and a movable mold to mold a skin as a first molded product. Next, the movable mold is separated from the fixed mold to enlarge the volume of the cavity, and the secondary molten resin is injected into the enlarged cavity to mold the base material as the second molded product.

また、特許文献２には、フィルムと基材が一体となった多層樹脂成形品の製造方法が開示されている。特許文献３には、キャビティの内面に熱硬化性塗料を塗布した後に、加熱溶融した原料樹脂をキャビティ内に射出することによって、表面の少なくとも一部に塗膜を有する成形品を得ることのできる成形品の製造方法が開示されている。特許文献４には、一方の型と他方の型との間に第１の樹脂を供給して第１の層を成形した後、第１の層を保持した一方の型と他方の型との間に空隙を設け、この空隙に第２の樹脂を充填して第２の層を成形する多層成形品の製造方法が開示されている。   Patent Document 2 discloses a method for producing a multilayer resin molded product in which a film and a substrate are integrated. In Patent Document 3, after applying a thermosetting coating to the inner surface of the cavity, a molded product having a coating film on at least a part of the surface can be obtained by injecting the heat-melted raw material resin into the cavity. A method for manufacturing a molded article is disclosed. In Patent Document 4, a first resin is supplied between one mold and the other mold to form the first layer, and then the one mold holding the first layer and the other mold There is disclosed a method for manufacturing a multilayer molded article in which a gap is provided between the two layers and a second resin is formed by filling the gap with a second resin.

特開２００１−３３４５４９公報JP 2001-334549 A 特開２００７−３３１１８５公報JP 2007-331185 A 特開２００４−２３７４６１公報JP 2004-237461 A 特開平９−１５８２号公報Japanese Patent Laid-Open No. 9-1582

ところで、特許文献１に記載の製造方法では、可動金型の型面に保持された表皮と固定金型の間に２次溶融樹脂を射出している。これにより、表皮に対して基材を一体に成形することが可能となっている。   By the way, in the manufacturing method described in Patent Document 1, secondary molten resin is injected between the skin held on the mold surface of the movable mold and the fixed mold. Thereby, it is possible to form the base material integrally with the skin.

しかしながら、特許文献１に記載の製造方法では、可動金型を固定金型から離間させる際に、表皮が可動金型の型面から離れてしまう場合があった。この場合、表皮と可動金型の型面との間には隙間が発生してしまい、可動金型の型面に保持された表皮と固定金型の間に２次溶融樹脂を射出した際に、２次溶融樹脂の射出圧によって表皮にシワや破れ等が発生してしまうという問題があった。   However, in the manufacturing method described in Patent Document 1, when the movable mold is separated from the fixed mold, the skin may be separated from the mold surface of the movable mold. In this case, a gap is generated between the skin and the mold surface of the movable mold, and when the secondary molten resin is injected between the skin held on the mold surface of the movable mold and the fixed mold. There was a problem that wrinkles, tears, etc. would occur in the skin due to the injection pressure of the secondary molten resin.

また、基材を発泡成形する場合、上記問題を解決しようとして予め基材を発泡成形した後に表皮を成形しようとすると、表皮成形時の射出圧によって基材の発泡セルが破壊され、基材表面に凹みを生じてしまう。   In addition, when foaming a base material, if the base material is foam-molded in advance in order to solve the above problems, the foam cell of the base material is destroyed by the injection pressure at the time of skin molding, and the base material surface Will cause dents.

本発明は上記のような事情に基づいて完成されたものであって、表皮が成形型の型面から離間することを防ぐことで表皮にシワや破れを発生させることなく複合成形品を製造することを目的とする。   The present invention has been completed based on the above-described circumstances, and manufactures a composite molded article without causing the skin to be wrinkled or torn by preventing the skin from being separated from the mold surface. For the purpose.

本発明は、第１成形品と第２成形品とが一体化された複合成形品の製造方法であって、凹状をなす第１成形面と凸状をなす第２成形面との間で前記第１成形品を成形する第１成形工程と、前記第１成形面に保持された前記第１成形品と凸状をなす第３成形面との間で前記第２成形品を発泡成形する第２成形工程とを備え、前記第１成形面の型抜き方向に対する勾配が、前記第２成形面の型抜き方向に対する勾配よりも小さく設定されていることを特徴とする。   The present invention is a method of manufacturing a composite molded product in which a first molded product and a second molded product are integrated, and the method is provided between a first molding surface having a concave shape and a second molding surface having a convex shape. A second molding product is foam-molded between a first molding step of molding the first molded product and the first molded product held on the first molding surface and a third molding surface having a convex shape. And a second molding step, wherein the gradient of the first molding surface with respect to the die cutting direction is set to be smaller than the gradient of the second molding surface with respect to the die cutting direction.

このような構成によれば、第１成形面に保持された第１成形品が当該第１成形面から離間しにくくなる。したがって、第１成形品にシワや破れを生じさせることなく複合成形品を製造することが可能となる。
また、第１成形品を成形した後に第２成形品を成形しているため、第２成形品の発泡セルを破壊することがなく、第２成形品の表面に凹みを生じさせることがなくなる。 According to such a configuration, the first molded product held on the first molding surface is unlikely to be separated from the first molding surface. Therefore, it is possible to manufacture a composite molded product without causing wrinkles or tears in the first molded product.
Further, since the second molded product is molded after the first molded product is molded, the foamed cells of the second molded product are not destroyed, and the surface of the second molded product is not dented.

本発明によれば、表皮が成形型の型面から離間することを防ぐことで表皮にシワや破れを発生させることなく複合成形品を製造することができる。   According to the present invention, it is possible to manufacture a composite molded product without causing wrinkles or tears in the skin by preventing the skin from separating from the mold surface of the mold.

以下、本発明の実施形態について図面を参照しながら詳細に説明する。
図１は、複合成形品５０を製造するための成形用金型１０の一例を示す断面図である。図１に示すように、成形用金型１０は、固定金型１２と、その固定金型１２と対向するように配置された可動金型１４とを備えている。固定金型１２は、凹状の第１成形面Ｓ１を有している。可動金型１４は、凸状の第２成形面Ｓ２と、凸状の第３成形面Ｓ３とを有している。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of a molding die 10 for manufacturing a composite molded product 50. As shown in FIG. 1, the molding die 10 includes a fixed die 12 and a movable die 14 disposed so as to face the fixed die 12. The stationary mold 12 has a concave first molding surface S1. The movable mold 14 has a convex second molding surface S2 and a convex third molding surface S3.

固定金型１２の背面側には、第１射出装置Ｐ１、及び、第２射出装置Ｐ２が取り付けられている。第１射出装置Ｐ１は、第１成形面Ｓ１と第２成形面Ｓ２との間に１次溶融樹脂Ｒ１を射出することが可能となっている。第２射出装置Ｐ２は、第１成形面Ｓ１と第３成形面Ｓ３との間に２次溶融樹脂Ｒ２を射出することが可能となっている。   A first injection device P1 and a second injection device P2 are attached to the back side of the fixed mold 12. The first injection device P1 can inject the primary molten resin R1 between the first molding surface S1 and the second molding surface S2. The second injection device P2 can inject the secondary molten resin R2 between the first molding surface S1 and the third molding surface S3.

可動金型１４は、スライドベース１６に対して上下方向にスライド可能に取り付けられている。このスライドベース１６の下方には油圧シリンダ１８が取り付けられており、この油圧シリンダ１８によって可動金型１４を上下方向にスライドさせることが可能となっている。なお、このような可動金型１４を上下方向にスライドさせるための機構は、例えば特開２００１−３３４５４９公報に詳細に開示されている。
尚、本発明の実施形態では、油圧シリンダ１８をスライドベース１６の下方に取り付けているが、スライドベース１６の上方に取り付けてもよい。 The movable mold 14 is attached to the slide base 16 so as to be slidable in the vertical direction. A hydraulic cylinder 18 is attached below the slide base 16, and the movable mold 14 can be slid up and down by the hydraulic cylinder 18. Such a mechanism for sliding the movable mold 14 in the vertical direction is disclosed in detail in, for example, Japanese Patent Application Laid-Open No. 2001-334549.
In the embodiment of the present invention, the hydraulic cylinder 18 is attached below the slide base 16, but it may be attached above the slide base 16.

次に、基材５２と表皮５４とが一体に成形された複合成形品５０の製造方法について説明する。複合成形品５０の製造方法は、以下に説明する第１成形工程及び第２成形工程を有している。尚、基材５２が本発明の「第２成形品」に対応しており、表皮５４が本発明の「第１成形品」に対応している。   Next, the manufacturing method of the composite molded product 50 in which the base material 52 and the skin 54 are integrally molded will be described. The manufacturing method of the composite molded product 50 includes a first molding step and a second molding step described below. The base material 52 corresponds to the “second molded product” of the present invention, and the skin 54 corresponds to the “first molded product” of the present invention.

（第１成形工程）
第１成形工程では、図２に示すように、第１成形面Ｓ１と第２成形面Ｓ２との間に形成されたキャビティＣ１内に第１射出装置Ｐ１から１次溶融樹脂Ｒ１を射出する。これにより、表皮５４を成形することができる。この表皮５４の成形材料となる１次溶融樹脂Ｒ１としては、例えばＴＰＯ樹脂（熱可塑性オレフィン樹脂）を使用することができる。 (First molding process)
In the first molding step, as shown in FIG. 2, the primary molten resin R1 is injected from the first injection device P1 into the cavity C1 formed between the first molding surface S1 and the second molding surface S2. Thereby, the skin 54 can be shape | molded. For example, a TPO resin (thermoplastic olefin resin) can be used as the primary molten resin R1 to be a molding material of the skin 54.

（第２成形工程）
第２成形工程では、図３に示すように、スライドベース１６を移動させて（矢印ａ）、可動金型１４を固定金型１２から離間させた後に、油圧シリンダ１８によって可動金型１４を上方へスライドさせる（矢印ｂ）。つぎに、図４に示すように、可動金型１４を固定金型１２に接近させることで第１成形面Ｓ１に貼り付いた状態で保持された表皮５４と第３成形面Ｓ３との間にキャビティＣ２を形成する（矢印ｃ）。そして、図５に示すように、第１成形面Ｓ１に保持された表皮５４と第３成形面Ｓ３の間に、第２射出装置Ｐ２から発泡剤が添加された２次溶融樹脂Ｒ２を射出しキャビティＣ２内に充填させる。最後に、図６に示すように、スライドベース１６を所定の距離だけ移動し（矢印ｄ）、可動金型１４を固定金型１２から所定の距離だけ離間させることで２次溶融樹脂Ｒ２を発泡させる（コアバック発泡成形）。この結果、図７に示すように、基材５２と表皮５４とが一体化された複合成形品５０を製造することができる。 (Second molding step)
In the second molding step, as shown in FIG. 3, the slide base 16 is moved (arrow a) to move the movable mold 14 away from the fixed mold 12, and then the movable mold 14 is moved upward by the hydraulic cylinder 18. (Arrow b). Next, as shown in FIG. 4, the movable mold 14 is moved closer to the fixed mold 12 so that the skin 54 is held between the first molding surface S1 and the third molding surface S3. A cavity C2 is formed (arrow c). Then, as shown in FIG. 5, a secondary molten resin R2 to which a blowing agent is added is injected from the second injection device P2 between the skin 54 held on the first molding surface S1 and the third molding surface S3. The cavity C2 is filled. Finally, as shown in FIG. 6, the secondary base resin R2 is foamed by moving the slide base 16 by a predetermined distance (arrow d) and separating the movable mold 14 from the fixed mold 12 by a predetermined distance. (Core back foam molding). As a result, as shown in FIG. 7, a composite molded product 50 in which the base material 52 and the skin 54 are integrated can be manufactured.

基材５２の成形材料となる２次溶融樹脂Ｒ２としては、例えばＰＰ樹脂（ポリプロピレン樹脂）を使用することができる。２次溶融樹脂Ｒ２に添加する発泡剤としては、例えば、化学発泡剤あるいは物理発泡剤を使用することができる。化学発泡剤としては、例えば、炭酸水素ナトリウム、炭酸水素アンモニウム、炭酸アンモニウム等の無機系発泡剤、Ｎ，Ｎ’−ジニトロソペンタメチレンテトラミン等のニトロソ化合物、アゾジカルボンアミド、アゾビスイソブチロニトリル等のアゾ化合物、ベンゼンスルホニルヒドラジド、トルエンスルホニルヒドラジド、ジフェニルスルホン−３，３’−ジスルホニルヒドラジド等のスルホニルヒドラジド類、ｐ−トルエンスルホニルセミカルバジド等を使用することができる。物理発泡剤としては、例えば、炭酸ガスや窒素ガス等を使用することができる。   For example, PP resin (polypropylene resin) can be used as the secondary molten resin R2 to be the molding material of the base material 52. As the foaming agent added to the secondary molten resin R2, for example, a chemical foaming agent or a physical foaming agent can be used. Examples of the chemical foaming agent include inorganic foaming agents such as sodium hydrogen carbonate, ammonium hydrogen carbonate and ammonium carbonate, nitroso compounds such as N, N′-dinitrosopentamethylenetetramine, azodicarbonamide, azobisisobutyronitrile. An azo compound such as benzenesulfonyl hydrazide, toluenesulfonyl hydrazide, sulfonyl hydrazides such as diphenylsulfone-3,3′-disulfonyl hydrazide, p-toluenesulfonyl semicarbazide and the like can be used. As the physical foaming agent, for example, carbon dioxide gas or nitrogen gas can be used.

図８は、図１に示す成形用金型１０のＡ部の拡大断面図である。
図８に示すように、第１成形面Ｓ１は全体として凹状に形成されており、第２成形面Ｓ２は全体として凸状に形成されている。第１成形面Ｓ１と第２成形面Ｓ２との間には、表皮５４を成形するための空間であるキャビティＣ１が形成されている。第１成形面Ｓ１の外周部と、第２成形面Ｓ２の外周部とは、パーティングラインＰＬにおいて互いに接触している。 FIG. 8 is an enlarged cross-sectional view of a part A of the molding die 10 shown in FIG.
As shown in FIG. 8, the first molding surface S1 is formed in a concave shape as a whole, and the second molding surface S2 is formed in a convex shape as a whole. A cavity C1 that is a space for molding the skin 54 is formed between the first molding surface S1 and the second molding surface S2. The outer periphery of the first molding surface S1 and the outer periphery of the second molding surface S2 are in contact with each other in the parting line PL.

第１成形面Ｓ１は、ほぼ平坦に形成された平坦部Ｓ１ａと、その平坦部Ｓ１ａの外周においてパーティングラインＰＬに向けて立ち上がった立壁部Ｓ１ｂとを有している。
第２成形面Ｓ２は、ほぼ平坦に形成された平坦部Ｓ２ａと、その平坦部Ｓ２ａの外周においてパーティングラインＰＬに向けて立ち上がった立壁部Ｓ２ｂとを有している。 The first molding surface S1 includes a flat portion S1a formed substantially flat, and a standing wall portion S1b rising toward the parting line PL on the outer periphery of the flat portion S1a.
The second molding surface S2 has a flat portion S2a formed substantially flat, and an upright wall portion S2b rising toward the parting line PL on the outer periphery of the flat portion S2a.

図８に示すように、第１成形面Ｓ１の立壁部Ｓ１ｂは、型抜き方向の直線Ｌ１に対して所定の角度で交差している。以下、この角度のことを、第１成形面Ｓ１の型抜き方向に対する勾配θ１と呼ぶことにする。
また、第２成形面Ｓ２の立壁部Ｓ２ｂは、型抜き方向の直線Ｌ２に対して所定の角度で交差している。以下、この角度のことを、第２成形面Ｓ２の型抜き方向に対する勾配θ２と呼ぶことにする。
なお、本明細書において、「型抜き方向」とは、図８において左右方向のことであり、固定金型１２と可動金型１４とを互いに離間させる方向のことである。 As shown in FIG. 8, the standing wall portion S1b of the first molding surface S1 intersects the straight line L1 in the die cutting direction at a predetermined angle. Hereinafter, this angle will be referred to as a gradient θ1 with respect to the die cutting direction of the first molding surface S1.
Further, the standing wall portion S2b of the second molding surface S2 intersects the straight line L2 in the die cutting direction at a predetermined angle. Hereinafter, this angle is referred to as a gradient θ2 with respect to the die-cutting direction of the second molding surface S2.
In the present specification, the “molding direction” is the left-right direction in FIG. 8 and is the direction in which the fixed mold 12 and the movable mold 14 are separated from each other.

本実施形態において、第１成形面Ｓ１の型抜き方向に対する勾配θ１は、第２成形面Ｓ２の型抜き方向に対する勾配θ２よりも小さく設定されている。例えば、勾配θ１は２〜３°に設定されており、勾配θ２は５〜１５°に設定されている。   In the present embodiment, the gradient θ1 of the first molding surface S1 with respect to the die cutting direction is set to be smaller than the gradient θ2 of the second molding surface S2 with respect to the die cutting direction. For example, the gradient θ1 is set to 2 to 3 °, and the gradient θ2 is set to 5 to 15 °.

勾配θ１が勾配θ２よりも小さく設定されることによって、表皮５４が第１成形面Ｓ１から離間しにくくなる。なぜなら、第１成形面Ｓ１の立壁部Ｓ１ｂと表皮５４との間に作用する摩擦力が、第２成形面Ｓ２の立壁部Ｓ２ｂと表皮５４との間に作用する摩擦力よりも大きくなるためである。   By setting the gradient θ1 to be smaller than the gradient θ2, it is difficult for the skin 54 to be separated from the first molding surface S1. This is because the friction force acting between the standing wall portion S1b of the first molding surface S1 and the skin 54 becomes larger than the friction force acting between the standing wall portion S2b of the second molding surface S2 and the skin 54. is there.

本実施形態の複合成形品５０の製造方法によれば、第１成形面Ｓ１に貼り付いた状態で保持された表皮５４が、当該第１成形面Ｓ１から離間しにくくなる。したがって、表皮５４と第１成形面Ｓ１との間に隙間が発生することを防止することが可能である。この結果、第１成形面Ｓ１に保持された表皮５４と第３成形面Ｓ３との間に２次溶融樹脂Ｒ２を射出した際に、表皮５４にシワや破れが発生することを防止することができる。   According to the manufacturing method of the composite molded product 50 of the present embodiment, the skin 54 held in a state of being attached to the first molding surface S1 is unlikely to be separated from the first molding surface S1. Therefore, it is possible to prevent a gap from being generated between the skin 54 and the first molding surface S1. As a result, when the secondary molten resin R2 is injected between the skin 54 held on the first molding surface S1 and the third molding surface S3, it is possible to prevent the skin 54 from being wrinkled or torn. it can.

本実施形態の複合成形品５０の製造方法によれば、表皮５４にシワや破れを発生させることなく複合成形品５０を製造することが可能となる。
このようにして製造された複合成形品５０は、車両用内装材として好適に使用することができる。例えば、ドアトリム、インストルメントパネル、シートバックボード、パーティションボード、コンソールボックス、ピラーガーニッシュ、クォータトリム等の車両用内装材として好適に使用することができる。 According to the method for manufacturing the composite molded product 50 of the present embodiment, the composite molded product 50 can be manufactured without causing wrinkles or tears in the skin 54.
The composite molded product 50 thus manufactured can be suitably used as a vehicle interior material. For example, it can be suitably used as vehicle interior materials such as door trims, instrument panels, seat back boards, partition boards, console boxes, pillar garnishes, quarter trims and the like.

本実施形態の複合成形品５０の製造方法によれば、基材５２が発泡体によって成形されているために、複合成形品５０の軽量化が可能である。   According to the manufacturing method of the composite molded product 50 of this embodiment, since the base material 52 is shape | molded with the foam, the weight reduction of the composite molded product 50 is possible.

また、本実施形態の複合成形品５０の製造方法によれば、表皮５４を成形した後に基材５２を成形しているために、基材５２の表面に凹みが発生することを防止することが可能である。   Moreover, according to the manufacturing method of the composite molded product 50 of this embodiment, since the base material 52 is shape | molded after shape | molding the skin 54, it can prevent that a dent generate | occur | produces on the surface of the base material 52. Is possible.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
（１）上記実施形態では、固定金型１２と可動金型１４とが左右方向に配置されている例を示したが、固定金型１２と可動金型１４とが上下方向に配置されている場合であっても本発明を適用することができる。
（２）上記実施形態では、１つの可動金型１４に対して第２成形面Ｓ２及び第３成形面Ｓ３が形成されている例を示したが、図９に示すように、別体に形成された２つの可動金型１４ａ、１４ｂに対して、第２成形面Ｓ２及び第３成形面Ｓ３がそれぞれ形成されている場合であっても本発明を適用することができる。
（３）上記実施形態では、固定金型１２側で表皮５４を保持していたが、その逆に可動金型１４側を凹状とし、可動金型１４で表皮５４を保持する場合であっても本発明を適用することができる。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) Although the fixed mold 12 and the movable mold 14 are arranged in the left-right direction in the above embodiment, the fixed mold 12 and the movable mold 14 are arranged in the vertical direction. Even in this case, the present invention can be applied.
(2) In the above embodiment, an example in which the second molding surface S2 and the third molding surface S3 are formed on one movable mold 14 has been shown. However, as shown in FIG. The present invention can be applied even when the second molding surface S2 and the third molding surface S3 are respectively formed on the two movable molds 14a and 14b.
(3) In the above embodiment, the skin 54 is held on the fixed mold 12 side, but conversely, even when the movable mold 14 side is concave and the skin 54 is held by the movable mold 14. The present invention can be applied.

複合成形品を製造するための成形用金型の一例を示す断面図である。It is sectional drawing which shows an example of the metal mold | die for manufacturing a composite molded product. 成形用金型の断面図であり、第１成形面と第２成形面との間に１次溶融樹脂を射出した後の状態を示している。It is sectional drawing of the metal mold | die for shaping | molding, and has shown the state after inject | pouring primary molten resin between the 1st molding surface and the 2nd molding surface. 成形用金型の断面図であり、可動金型を固定金型から離間させた後に、可動金型を上方へスライドさせた状態を示している。It is sectional drawing of the metal mold | die for shaping | molding, and shows the state which moved the movable metal mold | die upward after separating a movable metal mold from a fixed metal mold | die. 成形用金型の断面図であり、第１成形面に保持された表皮と第３成形面との間に２次溶融樹脂を射出する前の状態を示している。It is sectional drawing of the metal mold | die for shaping | molding, and has shown the state before inject | pouring secondary molten resin between the skin hold | maintained on the 1st molding surface, and the 3rd molding surface. 成形用金型の断面図であり、第１成形面に保持された表皮と第３成形面との間に２次溶融樹脂を射出した後の状態を示している。It is sectional drawing of a metal mold | die for shaping | molding, and has shown the state after inject | pouring secondary molten resin between the outer skin hold | maintained on the 1st shaping | molding surface, and the 3rd shaping | molding surface. 成形用金型の断面図であり、可動金型を固定金型から所定の距離だけ離間させることで２次溶融樹脂を発泡させた後の状態を示している。It is sectional drawing of the metal mold | die for shaping | molding, and shows the state after making secondary molten resin foam by separating a movable metal mold | die from a fixed mold | die by predetermined distance. 成形用金型の断面図であり、可動金型と固定金型との間から複合成形品を取り出した後の状態を示している。It is sectional drawing of the metal mold | die for shaping | molding, and has shown the state after taking out a composite molded product from between a movable metal mold | die and a fixed metal mold | die. 図１に示す成形用金型のＡ部の拡大断面図である。It is an expanded sectional view of the A section of the molding die shown in FIG. 別体に形成された２つの可動金型に対して、第２成形面及び第３成形面がそれぞれ形成されている変形例を示す断面図である。It is sectional drawing which shows the modification in which the 2nd shaping | molding surface and the 3rd shaping | molding surface are each formed with respect to the two movable molds formed in the different body.

符号の説明Explanation of symbols

１０…成形用金型
１２…固定金型
１４…可動金型
５０…複合成形品
５２…基材（第２成形品）
５４…表皮（第１成形品）
Ｒ１…１次溶融樹脂
Ｒ２…２次溶融樹脂
Ｓ１…第１成形面
Ｓ２…第２成形面
Ｓ３…第３成形面
θ１…第１成形面の型抜き方向に対する勾配
θ２…第２成形面の型抜き方向に対する勾配 DESCRIPTION OF SYMBOLS 10 ... Mold for shaping | molding 12 ... Fixed mold 14 ... Movable mold 50 ... Composite molded product 52 ... Base material (2nd molded product)
54 ... Skin (first molded product)
R1 ... primary molten resin R2 ... secondary molten resin S1 ... first molding surface S2 ... second molding surface S3 ... third molding surface θ1 ... gradient of the first molding surface with respect to the mold release direction θ2 ... mold of the second molding surface Gradient with respect to the drawing direction

Claims (1)

第１成形品と第２成形品とが一体化された複合成形品の製造方法であって、
凹状をなす第１成形面と凸状をなす第２成形面との間で前記第１成形品を成形する第１成形工程と、
前記第１成形面に保持された前記第１成形品と凸状をなす第３成形面との間で前記第２成形品を発泡成形する第２成形工程とを備え、
前記第１成形面の型抜き方向に対する勾配が、前記第２成形面の型抜き方向に対する勾配よりも小さく設定されていることを特徴とする複合成形品の製造方法。 A method for producing a composite molded product in which a first molded product and a second molded product are integrated,
A first molding step of molding the first molded product between a concave first molding surface and a convex second molding surface;
A second molding step of foam-molding the second molded product between the first molded product held on the first molding surface and a convex third molding surface;
The method for producing a composite molded article, wherein a gradient of the first molding surface with respect to a die cutting direction is set smaller than a gradient of the second molding surface with respect to a die cutting direction.
JP2008258970A 2008-10-03 2008-10-03 Method for producing composite molded article Pending JP2010089285A (en)

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