JP5662673B2 - Manufacturing method of composite products - Google Patents

Manufacturing method of composite products Download PDF

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JP5662673B2
JP5662673B2 JP2009272836A JP2009272836A JP5662673B2 JP 5662673 B2 JP5662673 B2 JP 5662673B2 JP 2009272836 A JP2009272836 A JP 2009272836A JP 2009272836 A JP2009272836 A JP 2009272836A JP 5662673 B2 JP5662673 B2 JP 5662673B2
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metal body
mold
molten resin
resin
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JP2011115955A (en
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善裕 大上
善裕 大上
豊岡　尚登
尚登 豊岡
洋介 嵯峨山
洋介 嵯峨山
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Nissha Printing Co Ltd
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Description

本発明は、厚みの薄い金属体の一方の面に加飾シートによる加飾が施され、他方の面に樹脂部が一体的に成形された複合品の製造方法に関する。   The present invention relates to a method for manufacturing a composite product in which a surface of a thin metal body is decorated with a decorative sheet and a resin part is integrally formed on the other surface.

近年、本物志向の高まりにより、樹脂成形品においても、良好な質感や高級感が求められるようになり、樹脂部と、金属体とを組み合わせて形成される複合品が増えてきている。
従来、この種の複合品の製造方法としては、予め、所期の形状に成形（例えば、プレス成形等）した金属体を、一対の成形型の間に構成されるキャビティにセットした状態で、金属体の裏面側に、成形型のゲートから溶融樹脂を射出して、金属体の裏面に樹脂を密着させて一体化が図られていた（特許文献１参照）。
また、金属体の表面に加飾を施す場合には、上述のように一体化された複合品の表面に、後から加飾を実施していた。
即ち、金属体の成形工程、金属体と溶融樹脂との一体化工程、加飾工程の各工程によって複合品は製造されていた。 In recent years, due to the increase in authenticity, resin molded products are required to have a good texture and a high-class feeling, and composite products formed by combining a resin portion and a metal body are increasing.
Conventionally, as a manufacturing method of this type of composite product, in a state where a metal body that has been previously molded into a desired shape (for example, press molding or the like) is set in a cavity configured between a pair of molding dies, Integration was achieved by injecting molten resin from the gate of the molding die onto the back side of the metal body and bringing the resin into close contact with the back side of the metal body (see Patent Document 1).
Moreover, when decorating the surface of a metal body, the decoration of the surface of the composite article integrated as mentioned above was implemented afterwards.
That is, the composite product was manufactured by the metal body forming process, the metal body and molten resin integration process, and the decoration process.

特開２００３−２００４５３号公報（図５）Japanese Patent Laying-Open No. 2003-200453 (FIG. 5)

上述した従来の複合品製造方法によれば、上述のように、製造工程が成形工程、一体化工程、加飾工程の三工程にわたることから、製造手間が掛かり、製品の製造効率が低いと共にコスト高になり易い問題点がある。   According to the above-described conventional composite product manufacturing method, as described above, since the manufacturing process includes the molding process, the integration process, and the decoration process, it takes time and effort, and the manufacturing efficiency of the product is low and the cost is low. There is a problem that tends to be high.

従って、本発明の目的は、上記問題点を解消し、製造効率の向上によってコストダウンを図ることができる「複合品の製造方法」を提供するところにある。   Accordingly, an object of the present invention is to provide a “composite product manufacturing method” that can eliminate the above-mentioned problems and can reduce the cost by improving the manufacturing efficiency.

本発明の第１の特徴構成は、厚みの薄い金属体の一方の面に加飾シートによる加飾が施され、他方の面に樹脂部が一体的に成形された複合品の製造方法であって、
一対の成形型の間に、前記加飾シートと前記金属体とを配置した状態で型締めを行い、
前記金属体の他方の面側に溶融樹脂を射出して、前記溶融樹脂の圧力で前記加飾シートと前記金属体とを一方の成形型に押し付けて、前記金属体の一方の面に加飾層を形成すると共に、樹脂と金属とを前記成形型に沿った所期形状に一体化するところにある。 A first characteristic configuration of the present invention is a method for manufacturing a composite product in which a thin metal body is decorated with a decorative sheet on one surface and a resin portion is integrally formed on the other surface. And
Clamping is performed between the pair of molds in a state where the decorative sheet and the metal body are disposed,
The molten resin is injected onto the other surface side of the metal body, and the decoration sheet and the metal body are pressed against one mold with the pressure of the molten resin, and the decoration is applied to one surface of the metal body. The layer is formed and the resin and the metal are integrated into a desired shape along the mold.

本発明の第１の特徴構成によれば、金属体の成形工程と、金属体と溶融樹脂との一体化工程と、金属体への加飾工程との各工程を、成形型内で一度にまとめて実施することができる。
即ち、溶融樹脂の圧力で加飾シートと金属体とを一方の成形型に押し付けるから、それに伴って、金属体を、成形型に沿う所期形状に変形させることができる。
また、成形型と金属体との間には、加飾シートが介在しているから、前記溶融樹脂の射出圧力によって加飾シートが金属体と一体化される。
更には、溶融樹脂と金属体を所期形状に成形すると共に、金属体と加飾シートとを圧着させた前記溶融樹脂は、その圧力の作用で金属体とも強固に一体化され、前記金属体と加飾シートと樹脂部とが一体となった前記複合品を、一つの射出工程によって製造することができる。
その結果、前記複合品の製造効率の向上と共に、コストダウンを図ることができるようになった。 According to the 1st characteristic structure of this invention, each process of the shaping | molding process of a metal body, the integration process of a metal body and molten resin, and the decoration process to a metal body is carried out at once within a shaping | molding die. It can be implemented collectively.
That is, the decorative sheet and the metal body are pressed against one mold by the pressure of the molten resin, and accordingly, the metal body can be deformed into an expected shape along the mold.
In addition, since the decorative sheet is interposed between the mold and the metal body, the decorative sheet is integrated with the metal body by the injection pressure of the molten resin.
Furthermore, the molten resin and the metal body are molded into the desired shape, and the molten resin obtained by press-bonding the metal body and the decorative sheet is firmly integrated with the metal body by the action of the pressure. And the decorative sheet and the resin part can be manufactured in one injection process.
As a result, the manufacturing efficiency of the composite product can be improved and the cost can be reduced.

本発明の第２の特徴構成は、型締めの際に用いる位置決めピンと、前記位置決めピンが嵌合して双方の位置を決める位置決め用穴とを振り分けて形成した前記成形型と前記金属体とを用いて型締めを行うところにある。   According to a second characteristic configuration of the present invention, the molding die formed by distributing a positioning pin used for mold clamping, and a positioning hole for fitting the positioning pin to determine both positions, and the metal body are provided. It is in the place where mold clamping is used.

本発明の第２の特徴構成によれば、位置決めピンと位置決め用穴とが嵌合するように金属体を成形型にセットするだけで、互いの相対位置が決まり、成形型内での金属体の位置ずれを防止することができる。
本発明においては、溶融樹脂を型内に射出して、金属体を射出圧力で成形型に押し付けながら所期の形状に成形するから、金属体の位置を拘束していない場合は、成形型内での樹脂圧力で金属体が位置ずれする危険性がある。
本発明の特徴構成によれば、前記位置決めピンと位置決め用穴とで金属体の位置ずれを防止できるから、金属体を成形型内の予定位置に納まる状態に成形することが可能となる。その結果、製品の不良品発生率を低下させることができる。 According to the second characteristic configuration of the present invention, the relative positions of the metal bodies are determined by simply setting the metal bodies in the mold so that the positioning pins and the positioning holes are fitted. Misalignment can be prevented.
In the present invention, the molten resin is injected into the mold, and the metal body is molded into the desired shape while pressing the metal body against the mold with the injection pressure. There is a risk that the metal body is displaced due to the resin pressure at.
According to the characteristic configuration of the present invention, since the displacement of the metal body can be prevented by the positioning pin and the positioning hole, the metal body can be molded in a state that fits in a predetermined position in the mold. As a result, the defective product occurrence rate of the product can be reduced.

本発明の第３の特徴構成は、前記溶融樹脂の射出は、前記金属体の重心位置にゲートを配置して行うところにある。   According to a third characteristic configuration of the present invention, the injection of the molten resin is performed by arranging a gate at the center of gravity of the metal body.

ゲートから射出される溶融樹脂は、キャビティの末端部に向かって流動しながら拡がり、前記金属体へ圧力を作用させる。従って、金属体を成形型に沿う所期形状に成形するにあたっては、前記溶融樹脂の流動方向に沿って金属体も拡げられていく。
本発明の第３の特徴構成によれば、金属体の重心位置にゲートを配置してあるから、比較としてゲートが偏芯している場合に比べて、ゲート位置から金属体の縁部までの距離のバラツキを少なくできる。
従って、溶融樹脂の流動によって外周側へ拡げられる金属体も、放射状に均等に広がり易くなる。その結果、金属体の位置が偏ることを防止でき、より精度の高い複合品を製造することができるようになる。 The molten resin injected from the gate spreads while flowing toward the end of the cavity, and applies pressure to the metal body. Therefore, when forming the metal body into the desired shape along the mold, the metal body is also expanded along the flow direction of the molten resin.
According to the third characteristic configuration of the present invention, since the gate is arranged at the center of gravity of the metal body, the gate position to the edge of the metal body is compared with the case where the gate is eccentric as a comparison. The variation in distance can be reduced.
Therefore, the metal body that is expanded to the outer peripheral side by the flow of the molten resin is also easily spread radially and uniformly. As a result, it is possible to prevent the position of the metal body from being biased and to manufacture a more accurate composite product.

製造された複合品を示す一部切欠き斜視図Partial cutaway perspective view showing the manufactured composite product 一体品の配置状況を示す斜視図Perspective view showing the state of arrangement of one-piece products 複合品の製造手順を示す断面図Cross-sectional view showing manufacturing procedure of composite product 複合品の製造手順を示す断面図Cross-sectional view showing manufacturing procedure of composite product 別実施形態の加飾シートを示す説明断面図Explanatory sectional drawing which shows the decorating sheet of another embodiment 別実施形態の複合品の製造状況を示す斜視図The perspective view which shows the manufacture condition of the composite goods of another embodiment. 別実施形態の複合品の製造状況を示す断面図Sectional drawing which shows the manufacture condition of the composite article of another embodiment

以下に本発明の実施の形態を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の複合品製造方法によって形成した複合品１を示すもので、例えば、携帯電話等の電子機器の外装材として使用することができる。
当該複合品１は、厚みの薄い金属体２の一方の面に加飾シートＳによる加飾が施され、他方の面に樹脂部３が一体的に成形されている。 FIG. 1 shows a composite product 1 formed by the composite product manufacturing method of the present invention, and can be used as an exterior material of an electronic device such as a mobile phone, for example.
The composite product 1 is decorated with a decorative sheet S on one surface of a thin metal body 2, and the resin portion 3 is integrally formed on the other surface.

前記複合品１は、図１に示すように、角をまるめた矩形のお盆形状に成形してある。お盆形状の下面にあたる面が複合品１の表面にあたり、前記加飾シートＳによる加飾層Ｓａが形成されている。また、お盆形状の上面にあたる面が前記樹脂部３として形成されている。
加飾層Ｓａにおいては、例えば、文字やデザインマークや色彩等の加飾が施されている。本実施形態においては、加飾層Ｓａは、金属体２の表面の全域を覆う状態に設けられている。 As shown in FIG. 1, the composite product 1 is formed into a rectangular tray shape with rounded corners. A surface corresponding to the lower surface of the tray shape hits the surface of the composite product 1, and a decorative layer Sa is formed by the decorative sheet S. Further, a surface corresponding to the upper surface of the tray shape is formed as the resin portion 3.
In the decoration layer Sa, for example, decoration such as characters, design marks, and colors is applied. In the present embodiment, the decorative layer Sa is provided so as to cover the entire surface of the metal body 2.

前記複合品１の製造は、左右に対向配置の一対の成形型Ｋの間に、前記加飾シートＳと前記金属体２との一体品Ｐを配置した状態（図２参照）で型締め（第１成形型Ｋ１と第２成形型Ｋ２どうしを密接状態に合わせる）を行い（図３参照）、前記金属体２の他方の面側に溶融樹脂３ａを射出して、前記溶融樹脂３ａの圧力で前記加飾シートＳと前記金属体２とを前記第１成形型Ｋ１に押し付けて、前記金属体２の一方の面に加飾層Ｓａを形成すると共に、樹脂と金属とを成形型Ｋに沿った所期形状に一体化するものである（図４参照）。   The composite product 1 is manufactured by clamping the mold in a state (see FIG. 2) in which the decorative product S and the metal body 2 are integrated between a pair of molds K facing each other on the left and right. The first molding die K1 and the second molding die K2 are brought into close contact with each other) (see FIG. 3), and the molten resin 3a is injected onto the other surface side of the metal body 2 so that the pressure of the molten resin 3a The decorative sheet S and the metal body 2 are pressed against the first mold K1 to form a decoration layer Sa on one surface of the metal body 2, and the resin and metal are formed into the mold K. It is integrated into the desired shape along (see FIG. 4).

前記成形型Ｋは、図４に示すように、複合品１の表面側に位置する第１成形型Ｋ１（一方の成形型に相当）と、裏面側に位置する第２成形型Ｋ２とで構成してあり、両成形型どうしを密接させることで、両型の間にキャビティＶを形成できるように構成してあり、キャビティＶに前記一体品Ｐを位置させた状態で加熱された溶融樹脂３ａを充填して硬化させることで所定形状の複合品１を形成できる。
当該実施形態においては、第１成形型Ｋ１に、複合品１の表面形状に対応する凹面形状部Ｋ１ａが形成されている一方、第２成形型Ｋ２には、複合品１の裏面形状に対応する凸面形状部Ｋ２ａが形成されている。 As shown in FIG. 4, the mold K is composed of a first mold K1 (corresponding to one mold) located on the front side of the composite 1 and a second mold K2 located on the back side. In this case, the two molds are brought into close contact with each other so that a cavity V can be formed between the two molds, and the molten resin 3a heated in a state where the integrated product P is positioned in the cavity V. The composite article 1 having a predetermined shape can be formed by filling and curing.
In the embodiment, the first molding die K1 has a concave shape portion K1a corresponding to the surface shape of the composite product 1, while the second molding die K2 corresponds to the back surface shape of the composite product 1. A convex shape portion K2a is formed.

前記第１成形型Ｋ１の前記凹面形状部Ｋ１ａの外周部分は、図２に示すように、両成形型Ｋを密接させた状態で前記一体品Ｐを挟圧しないための段部Ｋ１ｂを全周にわたって形成してある。
この段部Ｋ１ｂを設けてあることで、第２成形型Ｋ２の対応部との間に、前記一体品Ｐの厚み寸法以上の隙間が確保され（図３参照）、前記一体品Ｐの面に沿う方向の移動を、ある程度の範囲において許容できる。従って、キャビティＶへの溶融樹脂３ａの射出に伴って、前記一体品Ｐが、溶融樹脂３ａの流れに沿って移動したり延びたりすることができ、一体品Ｐにシワが発生するのを防止し易くなる。
また、前記凹面形状部Ｋ１ａの前記段部Ｋ１ｂの上縁部の二ヵ所には、図２に示すように、前記一体品Ｐに形成した位置決め用穴４に遊嵌自在な位置決めピン５が、それぞれ設けてある。
この位置決めピン５に前記一体品Ｐの位置決め用穴４が外嵌する状態に前記一体品Ｐを設置することで、形成型Ｋに対する前記一体品Ｐの仮り止めを図ることができる。尚、位置決め用穴４と位置決めピンとは、遊嵌状態であるので、ある程度の余裕があり、前記一体品Ｐの面に沿う方向の移動を許容できる。 As shown in FIG. 2, the outer peripheral portion of the concave shape portion K1a of the first mold K1 has a stepped portion K1b for avoiding clamping the integrated product P in a state where both molds K are in close contact with each other. It is formed over.
By providing the stepped portion K1b, a gap larger than the thickness dimension of the integrated product P is secured between the corresponding portion of the second mold K2 (see FIG. 3), and the surface of the integrated product P is secured. Movement along the direction is acceptable within a certain range. Accordingly, as the molten resin 3a is injected into the cavity V, the integrated product P can move or extend along the flow of the molten resin 3a, and the integrated product P is prevented from being wrinkled. It becomes easy to do.
Further, as shown in FIG. 2, positioning pins 5 that can be freely fitted in positioning holes 4 formed in the integrated product P are provided at two places on the upper edge portion of the stepped portion K1b of the concave shape portion K1a. Each is provided.
By installing the integrated product P in a state in which the positioning holes 4 of the integrated product P are fitted to the positioning pins 5, it is possible to secure the integrated product P against the forming mold K. In addition, since the positioning hole 4 and the positioning pin are loosely fitted, there is some allowance, and movement in the direction along the surface of the integrated product P can be allowed.

前記第２成形型Ｋ２には、前記樹脂部３に相当する範囲のほぼ中央部に開口する状態に、溶融樹脂の射出を行うゲートＧを形成してある。ゲートＧは、他の部分には形成せずに、この位置に唯一設けてある。即ち、当該実施形態においては、金属体２の重心位置にゲートＧが配置されている。   In the second mold K2, a gate G for injecting molten resin is formed so as to open to a substantially central portion in a range corresponding to the resin portion 3. The gate G is not formed in other portions, and is provided only at this position. That is, in the embodiment, the gate G is disposed at the center of gravity of the metal body 2.

因みに、成形型Ｋには、図には示さないが、適温を維持するための温度維持手段や、空気抜き孔や、成形品の抜きだし手段等が設けられてある。前記温度維持手段によれば、キャビティＶ内に注入された溶融樹脂３ａが、好ましい状態で行き渡り且つ硬化できるように温度環境を維持できる。   Incidentally, although not shown in the drawing, the mold K is provided with a temperature maintaining means for maintaining an appropriate temperature, an air vent hole, a molded product extracting means, and the like. According to the temperature maintaining means, the temperature environment can be maintained so that the molten resin 3a injected into the cavity V can be spread and cured in a preferable state.

前記一体品Ｐは、前述のとおり、厚みの薄い金属体２の一方の面に加飾層Ｓａを、例えば、接着等の手段によって一体に設けて構成してある。従って、加飾シートＳの図柄等と金属体２との位置合わせは、加飾シートＳと金属体２との双方がフラットの状態のままで行うことができる。そのため、製造される複合品の表面が立体形状であっても、図柄等と金属体との位置合わせを精度よく行うことができる。
前記金属体２は、図２に示すように、矩形形状に形成してあり、上縁部分には、前記位置決めピン５に対応する延出部２ａが各別に設けてある。この延出部２ａに、前記位置決め用穴４が形成してある。
金属体２は、本実施形態においては、厚み０．３ｍｍ以下のアルミニウム板を例に挙げている。但し、金属体２は、アルミニウム板に限るものではなく、その他の素材であってもよく、軟らかく展性の高い素材で薄肉に形成してあるのが好ましい。 As described above, the integrated product P is configured by integrally providing the decorative layer Sa on one surface of the thin metal body 2 by means of, for example, adhesion. Therefore, the positioning of the design of the decorative sheet S and the metal body 2 can be performed while both the decorative sheet S and the metal body 2 are in a flat state. Therefore, even if the surface of the manufactured composite product has a three-dimensional shape, alignment between the design and the metal body can be accurately performed.
As shown in FIG. 2, the metal body 2 is formed in a rectangular shape, and an extended portion 2 a corresponding to the positioning pin 5 is provided in each upper edge portion. The positioning hole 4 is formed in the extending portion 2a.
In the present embodiment, the metal body 2 is exemplified by an aluminum plate having a thickness of 0.3 mm or less. However, the metal body 2 is not limited to an aluminum plate, and may be other materials, and is preferably formed of a soft and highly malleable material to be thin.

次に、複合品１の製造手順について図２〜４に示す。
［１］予め、金属体２の一方の面に加飾層Ｓａを一体化した前記一体品Ｐを形成しておき、その一体品Ｐを、第１成形型Ｋ１の凹部空間に配置すると共に、位置決めピン５に対して位置決め用穴４を嵌合させて仮止め状態にセットする（図３参照）。
この時、加飾層Ｓａが、第１成形型Ｋ１側に位置する向でセットする。
［２］両成形型Ｋを密接するまで近接させて型締めを行う。
［３］ゲートＧからキャビティＶに溶融樹脂３ａを注入する。溶融樹脂３ａは、前記一体品Ｐを第１成形型Ｋ１側に押圧しながら、キャビティＶ内を外周側に向かって拡がっていき、キャビティＶを埋め尽くす（図４参照）。この注入圧によって、前記一体品Ｐを第１成形型Ｋ１の凹面形状部Ｋ１ａに沿う形状にプレスすると共に、金属体２と加飾層Ｓａとの一体性を更に増すことができる。
更には、溶融樹脂３ａと金属体２との一体性も確保することができる。尚、金属体２の前記樹脂部３側の面には、図には示さないが、予め、両者の接着性を向上させるための接着層を設けておくのが好ましい。
［４］溶融樹脂３ａの硬化に伴って可動型Ｋどうしを離間させると共に、固定型Ｋの抜き出し手段（不図示）を使用して複合品１の脱型を図る。
［５］前記第１成形型Ｋ１の段部Ｋ１ｂにおいて硬化した部分を、バリとして撤去する。 Next, the manufacturing procedure of the composite product 1 is shown in FIGS.
[1] The integrated product P in which the decoration layer Sa is integrated on one surface of the metal body 2 is formed in advance, and the integrated product P is disposed in the recessed space of the first mold K1, The positioning hole 4 is fitted to the positioning pin 5 and set in a temporarily fixed state (see FIG. 3).
At this time, the decorative layer Sa is set in a direction positioned on the first molding die K1 side.
[2] The molds are clamped by bringing both molding dies K close together.
[3] The molten resin 3a is injected from the gate G into the cavity V. The molten resin 3a expands the inside of the cavity V toward the outer peripheral side while pressing the integrated product P toward the first mold K1, and fills the cavity V (see FIG. 4). With this injection pressure, the integrated product P can be pressed into a shape along the concave surface portion K1a of the first mold K1, and the integrity of the metal body 2 and the decorative layer Sa can be further increased.
Furthermore, the integrity of the molten resin 3a and the metal body 2 can be ensured. Although not shown in the drawing, it is preferable to previously provide an adhesive layer for improving the adhesion between the metal body 2 and the resin portion 3 side.
[4] As the molten resin 3a is cured, the movable molds K are separated from each other, and the composite product 1 is removed from the mold by using means for extracting the fixed mold K (not shown).
[5] The hardened portion at the stepped portion K1b of the first mold K1 is removed as a burr.

当該実施形態の複合品製造方法によれば、金属体２の成形工程と、金属体２と溶融樹脂３ａとの一体化工程と、金属体２への加飾工程との各工程を、成形型Ｋ内で一度にまとめて実施することができ、前記複合品１の製造効率の向上と共に、コストダウンを図ることができる。
また、成形型Ｋ内での一体品Ｐの仮固定は、前記位置決めピン５と位置決め用穴４とによって実施されており、溶融樹脂３ａの注入に伴う一体品Ｐの位置ずれを防止できるから、製品の不良品発生率を低下させることができる。
更に、ゲートＧの配置を、樹脂部３のほぼ中央に設定してあることで、溶融樹脂３ａの注入段階での金属体２の偏りを防止でき、より精度の高い複合品１を製造することができるようになる。 According to the composite article manufacturing method of the embodiment, each step of the molding process of the metal body 2, the integration process of the metal body 2 and the molten resin 3a, and the decoration process to the metal body 2 is performed by the molding die. K can be carried out all at once in K, and the manufacturing efficiency of the composite product 1 can be improved and the cost can be reduced.
In addition, the temporary fixing of the integrated product P in the mold K is performed by the positioning pin 5 and the positioning hole 4 and can prevent the positional shift of the integrated product P due to the injection of the molten resin 3a. The defective product occurrence rate of the product can be reduced.
Furthermore, since the arrangement of the gate G is set at substantially the center of the resin portion 3, the deviation of the metal body 2 at the injection stage of the molten resin 3a can be prevented, and a more accurate composite product 1 can be manufactured. Will be able to.

〔別実施形態〕
以下に他の実施の形態を説明する。 [Another embodiment]
Other embodiments will be described below.

〈１〉 前記複合品１は、先の実施形態で説明した形状、材質に限るものではなく、適宜変更が可能である。
〈２〉 前記成形型Ｋへの金属体２の仮固定機構は、先の実施形態で説明したように第１成形型Ｋ１に設けた位置決めピン５と、金属体２に形成した位置決め用穴４との組合せに限るものではなく、例えば、第１成形型Ｋ１に位置決め用穴４を、金属体２に位置決めピン５を形成するものであってもよい。また、第２成形型Ｋ２に対して金属体２を仮固定できるように構成するものであってもよい。
更には、ピンと穴との仮固定構造に替えて、両成形型Ｋの間に、金属体２を吊り支持する別体の支持具を位置させて仮固定するものであってもよい。
尚、両成形型Ｋを、左右に対向配置することに替えて、上下に対向配置する場合には、下側に配置される成形型の上に、金属体２を載置するだけで仮固定ができるから、必ずしも、仮固定機構を設ける必要はない。
〈３〉 前記加飾シートＳは、先の実施形態で説明したように、加飾層Ｓａのみで構成されたものに限らず、例えば、基体層Ｓｂの上に加飾層Ｓａを備え、金属体２の表面に前記加飾層Ｓａを転写するように構成されたものであってもよい。
この場合、金属体２に予め加飾シートＳを接着しておくことに替えて、例えば、図５に示すように、両成形型Ｋ間に、図外の送り機構によって適時、送り込まれるように加飾シートＳを構成しておくものであってもよい。送り込まれた加飾シートＳは、型締めの後、溶融樹脂３ａの注入圧力で、金属体２を成形型Ｋの形状に沿って変形させる際に、金属体２と成形型Ｋとに挟圧されて、金属体２の一方の面に、加飾シートＳの加飾層Ｓａを転写できるように構成してもよい。
また、加飾シートＳは、先の実施形態で説明したように金属体２の全面にわたって設けられるものに限らず、図６に示すように、金属体２の一部にのみ設けられる場合もある。
〈４〉 前記複合品１は、先の実施形態で説明したように、樹脂部３の全面に金属体２が設けてあるものに限らず、例えば、樹脂部３の一部に金属体２が設けられたものや、樹脂部３の一部を除いて金属体２が設けられたものや、樹脂部３の複数箇所に各別に金属体２が設けてあってもよい（図７参照）。
また、金属体２とゲートＧとの位置関係については、先の実施形態で説明したように、金属体２の重心位置にゲートＧを配置することに限らず、金属体２の形状や、樹脂部３に対する金属体２の箇所数や位置関係等によっては、金属体２の重心位置を外してゲートを配置したり、サイドゲートや多点ゲート（図７参照）を採用するものであってもよい。
〈５〉 金属体２と樹脂部３との接着は、先の実施形態では、溶融樹脂３ａの射出時に同時に行うことを説明したが、例えば、溶融樹脂３ａに金属体２との接着性が低いものを使用して、射出成形時には、金属体２と樹脂部３とを接着させず、成形後に、金属体２と樹脂部３とを接着一体化して複合品１を形成する方法を採ることも可能である。この場合、射出成形時に一体化を図った複合品に比べて、反りを少なくし易い。 <1> The composite article 1 is not limited to the shape and material described in the previous embodiment, and can be changed as appropriate.
<2> The temporary fixing mechanism of the metal body 2 to the molding die K includes the positioning pin 5 provided in the first molding die K1 and the positioning hole 4 formed in the metal body 2 as described in the previous embodiment. The positioning hole 4 may be formed in the first mold K1 and the positioning pin 5 may be formed in the metal body 2, for example. Moreover, you may comprise so that the metal body 2 can be temporarily fixed with respect to the 2nd shaping | molding die K2.
Furthermore, instead of the temporary fixing structure of the pin and the hole, a separate support tool that suspends and supports the metal body 2 may be positioned between the molds K and temporarily fixed.
When both molds K are disposed opposite to each other in place of the left and right, the metal body 2 is temporarily placed on the lower mold and temporarily fixed. Therefore, it is not always necessary to provide a temporary fixing mechanism.
<3> As described in the previous embodiment, the decorative sheet S is not limited to the one constituted only by the decorative layer Sa, and includes, for example, a decorative layer Sa on the base layer Sb, and a metal It may be configured to transfer the decorative layer Sa to the surface of the body 2.
In this case, instead of adhering the decoration sheet S to the metal body 2 in advance, for example, as shown in FIG. The decorative sheet S may be configured. The sent decorative sheet S is clamped between the metal body 2 and the mold K when the metal body 2 is deformed along the shape of the mold K with the injection pressure of the molten resin 3a after clamping. Then, the decoration layer Sa of the decoration sheet S may be transferred to one surface of the metal body 2.
Further, the decorative sheet S is not limited to being provided over the entire surface of the metal body 2 as described in the previous embodiment, and may be provided only on a part of the metal body 2 as shown in FIG. .
<4> As described in the previous embodiment, the composite product 1 is not limited to the case where the metal body 2 is provided on the entire surface of the resin portion 3, and for example, the metal body 2 is partially formed on the resin portion 3. The metal body 2 may be provided separately from the one provided, the metal body 2 provided except for a part of the resin portion 3, or a plurality of portions of the resin portion 3 (see FIG. 7).
The positional relationship between the metal body 2 and the gate G is not limited to the arrangement of the gate G at the center of gravity of the metal body 2 as described in the previous embodiment, but the shape of the metal body 2 and the resin Depending on the number of parts of the metal body 2 relative to the portion 3 and the positional relationship, the gate may be arranged with the center of gravity of the metal body 2 removed, or a side gate or a multipoint gate (see FIG. 7) may be employed. Good.
<5> In the previous embodiment, the adhesion between the metal body 2 and the resin portion 3 has been described at the time of injection of the molten resin 3a. However, for example, the adhesion between the molten resin 3a and the metal body 2 is low. In the injection molding, the metal body 2 and the resin part 3 are not bonded to each other, and after molding, the metal body 2 and the resin part 3 are bonded and integrated to form the composite product 1. Is possible. In this case, it is easy to reduce warpage compared to a composite product that is integrated during injection molding.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

２ 金属体
３ 樹脂部
３ａ 溶融樹脂
４ 位置決め用穴
５ 位置決めピン
Ｇ ゲート
Ｋ 成形型
Ｋ１ 第１成形型（一方の成形型）
Ｓ 加飾シート
Ｓａ 加飾層 2 Metal body 3 Resin part 3a Molten resin 4 Positioning hole 5 Positioning pin G Gate K Mold K1 First mold (one mold)
S decoration sheet Sa decoration layer

Claims (3)

厚みの薄い金属体の一方の面に、基体層とその上に形成された加飾層とを有する加飾シートによる加飾が施され、他方の面に樹脂部が一体的に成形された複合品の製造方法であって、
型締め時に、平板状の前記金属体の縁部が収納される段部がキャビティの周囲に形成された一対の成形型の間に、前記加飾シートと平板状の前記金属体とを配置して型締めを行う工程と、
前記金属体の他方の面側に溶融樹脂を射出して、前記溶融樹脂の圧力で前記加飾シートと前記金属体とを一方の成形型に押し付けることにより、前記金属体の一方の面に加飾層を形成すると共に、前記金属体を前記一方の成形型に沿った形状に成形し、前記金属体の他方の面に樹脂部を一体化させる工程とを備えた、複合品の製造方法。 A composite in which a decorative sheet having a base layer and a decorative layer formed thereon is decorated on one surface of a thin metal body, and a resin portion is integrally formed on the other surface A method for manufacturing a product,
At the time of clamping, the decorative sheet and the flat metal body are disposed between a pair of forming dies in which stepped portions in which the edges of the flat metal body are stored are formed around the cavity. The process of clamping the mold,
By injecting a molten resin onto the other surface side of the metal body and pressing the decorative sheet and the metal body against one mold with the pressure of the molten resin, the molten body is applied to one surface of the metal body. A method of manufacturing a composite product, comprising: forming a decoration layer, forming the metal body into a shape along the one mold, and integrating a resin portion on the other surface of the metal body. 前記加飾シートは、ロール状から巻き出されて前記一対の成形型の間に配置され、前記加飾層が前記金属体の一方の面に形成された後に、前記基体層が巻き取られる、請求項１記載の複合品の製造方法。   The decorative sheet is unwound from a roll and disposed between the pair of molds, and the base layer is wound after the decorative layer is formed on one surface of the metal body. The method for producing a composite product according to claim 1. 前記溶融樹脂の射出は、前記金属体の重心位置にゲートを配置して行われる、請求項１又は請求項２記載の複合品の製造方法。   The method for manufacturing a composite product according to claim 1 or 2, wherein the injection of the molten resin is performed by arranging a gate at a center of gravity of the metal body.
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