JP3467955B2 - Mold for film insert molding and molding method thereof - Google Patents

Mold for film insert molding and molding method thereof

Info

Publication number
JP3467955B2
JP3467955B2 JP04457496A JP4457496A JP3467955B2 JP 3467955 B2 JP3467955 B2 JP 3467955B2 JP 04457496 A JP04457496 A JP 04457496A JP 4457496 A JP4457496 A JP 4457496A JP 3467955 B2 JP3467955 B2 JP 3467955B2
Authority
JP
Japan
Prior art keywords
core
mold
cavity
film
molding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP04457496A
Other languages
Japanese (ja)
Other versions
JPH09234769A (en
Inventor
和男 矢島
止 小川
Original Assignee
日産自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to JP04457496A priority Critical patent/JP3467955B2/en
Publication of JPH09234769A publication Critical patent/JPH09234769A/en
Application granted granted Critical
Publication of JP3467955B2 publication Critical patent/JP3467955B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C2045/14188Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure trimming the article in the mould

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、フィルムインサー
ト成形用金型およびその成形方法に関し、特にフィルム
による表面加飾を施した樹脂射出成形品を得るためのフ
ィルムインサート成形用金型およびその成形方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film insert molding die and a molding method therefor, and more particularly to a film insert molding die and a molding method therefor for obtaining a resin injection-molded product whose surface is decorated with a film. Regarding

【0002】[0002]

【従来の技術】従来、インサート成形による表面加飾樹
脂成形品の成形方法としては、特開平6−106562
号公報に示されるものが知られている。この方法は、切
断刃を備えた予備成形金型を用いてインサートシートの
予備成形とトリミングとを同時に行う方法である。ま
た、特開昭57−102328号公報では凸部を有する
キャビティと凹部を有するコアとからなる成形金型と予
めプレス成形されたシート状部品を用意し、シート状部
品を金型内に設置し、型締め時に不要部分を切断し、型
締めが完了した後、樹脂を射出し一体成形する方法を開
示している。
2. Description of the Related Art Conventionally, as a method of molding a surface-decorated resin molded product by insert molding, Japanese Patent Laid-Open No. 6-106562 has been known.
The one shown in Japanese Patent Publication is known. This method is a method of simultaneously performing preforming and trimming of an insert sheet using a preforming die equipped with a cutting blade. Further, in Japanese Patent Application Laid-Open No. 57-102328, a molding die comprising a cavity having a convex portion and a core having a concave portion and a sheet-shaped component which is press-molded in advance are prepared, and the sheet-shaped component is installed in the die. Disclosed is a method of cutting an unnecessary portion at the time of mold clamping and injecting resin after the mold clamping is completed to integrally mold the resin.

【0003】一方、予備成形を行なわず、平板状フィル
ムを射出成形型内に設置し、溶融樹脂を射出し、成形品
を取り出した後、不要部分をカッターやレーザー光線等
を用いてトリミングすることで成形品形状に合わせた表
面加飾を行う方法が知られている。
On the other hand, without performing preforming, a flat film is placed in an injection molding die, molten resin is injected, a molded product is taken out, and unnecessary portions are trimmed by using a cutter or a laser beam. A method of performing surface decoration according to the shape of a molded product is known.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、予備成
形を行う方法にあっては、真空成形等の予備成形を行う
ための装置やその後のトリミングを行うための装置が必
要となり、工程が煩雑となるためコスト高となるという
問題があった。また、予備成形を行わない方法にあって
は、製品を傷付けないようにトリミングする必要がある
ため細かい作業が要求され、人手や高価な設備が必要と
なるという問題があった。
However, the method for performing preforming requires a device for performing preforming such as vacuum forming and a device for performing subsequent trimming, which complicates the process. Therefore, there is a problem that the cost becomes high. Further, in the method of not performing preforming, there is a problem in that it is necessary to trim the product so as not to damage the product, so that detailed work is required and manpower and expensive equipment are required.

【0005】従って本発明は、このような問題点を解決
することを目的としてなされたものであり、トリミング
を容易に行う成形金型を提供すると共に、本金型を用い
て簡便な方法により不要部分がきれいにトリミングされ
たフィルムインサート成形品を製造する方法を提供する
ことを目的とする。
Therefore, the present invention has been made for the purpose of solving such a problem, and provides a molding die which facilitates trimming, and is unnecessary by a simple method using the die. It is an object of the present invention to provide a method for producing a film insert molded product whose portion is trimmed cleanly.

【0006】[0006]

【課題を解決するための手段】本発明の上記の目的は、
製品に許容される余りフィルム幅と同等幅のエッジ部を
有する凹型の内部型と該内部型と嵌合してスライド可能
な凹型の外部型とからなるコアと、樹脂射出孔を有する
凸型の内部型と該内部型とスライド可能な凹型の外部型
とからなるキャビティとを備えることを特徴とするフィ
ルムインサート成形用金型、および前記フィルムインサ
ート成形用金型において、コアとキャビティとの間にフ
ィルム表面を前記コア側に、裏面を前記キャビティ側に
して設置した後、型締めし、溶融樹脂を射出または射出
圧縮し、冷却固化した後、フィルム表面側から凹型の内
部型のエッジ部がフィルムを押し切るように内部型と外
部型とを相対的に移動させ、型開きした後、成形品を取
り出すことを特徴とするフィルムインサート成形方法に
より達成された。以下、本発明について更に詳細に説明
する。
The above objects of the present invention are as follows.
A core consisting of a concave internal mold having an edge portion having a width equal to the surplus film width allowed for the product, and a concave external mold that is slidable by fitting with the internal mold, and a convex mold having a resin injection hole. A film insert molding die, comprising: an inner mold; and a cavity formed of the inner mold and a slidable concave outer mold, and in the film insert molding die, between a core and a cavity. After installing the film surface on the core side and the back surface on the cavity side, mold clamping, injection or injection compression of molten resin, cooling and solidification, and the edge portion of the concave internal mold from the film surface side It was achieved by a film insert molding method characterized in that an inner mold and an outer mold are moved relative to each other so as to push down, the mold is opened, and then a molded product is taken out. Hereinafter, the present invention will be described in more detail.

【0007】図1に本発明のトリミング機構の概念を示
すための成形金型断面図を示す。本発明は、図1に示す
ように、製品表面立体形状に合わせて加工され、製品に
許容される余りフィルム幅と同等の幅のエッジ部1′を
有する内部コア1とこの内部コア1と嵌合し、スライド
可能な外部コア2とを備えたコアAと、樹脂の射出孔3
を有し、製品の裏面形状にあわせて加工された内部キャ
ビティ4とこの内部キャビティ4と嵌合し、スライド可
能な外部キャビティ5とからなるキャビティBとを備え
ることにより、平板フィルムをインサートした後、型締
めし、溶融樹脂を射出し、冷却固化後、型開きを開始
し、型開き初期に外部コア2および外部キャビティ5の
相対位置を固定し、外部コア2および外部キャビティ5
により形成されるパーティングとエッジ1′とを相対的
に移動させ、フィルム不要部分と成形品の間を剪断によ
り切断することから成る。
FIG. 1 is a sectional view of a molding die for showing the concept of the trimming mechanism of the present invention. As shown in FIG. 1, according to the present invention, an inner core 1 which is processed according to a three-dimensional shape of a product surface and has an edge portion 1'having a width equal to a surplus film width allowed for the product and the inner core 1 are fitted to each other. Core A having a slidable outer core 2 and a resin injection hole 3
After the flat film is inserted, the flat film is inserted by having an internal cavity 4 which is processed according to the shape of the back surface of the product and a cavity B which is fitted to the internal cavity 4 and has an external cavity 5 which is slidable. , Mold clamping, injecting molten resin, cooling and solidifying, then starting mold opening, fixing the relative positions of the outer core 2 and the outer cavity 5 in the initial stage of mold opening, and fixing the outer core 2 and the outer cavity 5
The parting formed by 1 and the edge 1 ′ are moved relative to each other, and the portion between the film unnecessary portion and the molded product is cut by shearing.

【0008】本発明においては、フィルムは、溶融樹脂
射出時には、外部コア2と外部キャビティ5により押さ
えらえており切断はされていないが、射出が終了した
後、型開き時にフィルム不要部分が切断され、続いて製
品の取り出しが行われる。
In the present invention, the film is not cut because it is held by the outer core 2 and the outer cavity 5 at the time of injecting the molten resin, but the unnecessary portion of the film is cut when the mold is opened after the injection is completed. Then, the product is taken out.

【0009】[0009]

【発明の実施の形態】本発明の成形金型を用い、予備成
形を行わないでフィルムをインサートし、型締めを行う
とフィルムは切断されることなくコアとキャビティとの
間に設置される。次工程の溶融樹脂の射出では射出圧力
によりコアにフィルムが押しつけられ、予備成形を行わ
なくとも成形品の形状に表面がフィルムで覆われる。
BEST MODE FOR CARRYING OUT THE INVENTION When a molding die of the present invention is used and a film is inserted without preforming and the die is clamped, the film is placed between the core and the cavity without being cut. In the injection of the molten resin in the next step, the film is pressed against the core by the injection pressure, and the surface is covered with the film in the shape of the molded product without preforming.

【0010】また、射出した樹脂の冷却が完了した後、
型開きを行うと成形品の端部のフィルム不要部分が自動
的に切断され、型開き完了時には、製品形状に合わせ、
トリミングされた製品が得られ、特別なトリミング工程
を行う必要がない。このように本発明の成形金型によれ
ば、通常の射出成形と同様の操作によりフィルムの成形
および不要部分のトリミングを行うことができる。
After cooling of the injected resin is completed,
When the mold is opened, the film unnecessary part at the end of the molded product is automatically cut.
A trimmed product is obtained and no special trimming process is required. As described above, according to the molding die of the present invention, the film molding and the unnecessary portion trimming can be performed by the same operations as in the ordinary injection molding.

【0011】[0011]

【実施例】以下、本発明の実施例を図面を参照しながら
説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0012】実施例1 図2に本発明の一例を示す。コア部は、内部コア1と嵌
合する外部コア2をスプリング7により図2(a)に示
すように結合し、射出成形機の突き出し機構により押さ
れる突き出しプレート6を備える。キャビティ部は、射
出孔3を備えた内部キャビティ4と嵌合し、スライド可
能な外部キャビティ5とを図2(a)のようにスプリン
グ8で結合する。なお、スプリング7および8は、力が
かかっていない場合に図2(a)の状態にある。コア部
とキャビティ部との間には表面加飾に用いられるフィル
ム10をセットする。
Embodiment 1 FIG. 2 shows an example of the present invention. The core portion includes an ejection plate 6 that is joined to the inner core 1 by fitting the outer core 2 with a spring 7 as shown in FIG. 2A and is pushed by the ejection mechanism of the injection molding machine. The cavity portion is fitted with the inner cavity 4 having the injection hole 3, and the slidable outer cavity 5 is coupled with the spring 8 as shown in FIG. 2A. The springs 7 and 8 are in the state shown in FIG. 2A when no force is applied. A film 10 used for surface decoration is set between the core portion and the cavity portion.

【0013】図2(a)の状態から型締めを開始し、型
締めが完了すると図2(b)となり、スプリング8が圧
縮方向に型締め力により押される。次に、図2(c)に
示すように溶融樹脂を射出孔3より射出すると射出圧に
よりフィルム10がコア側に押しつけられ成形品表面を
覆う。予め設定した量の樹脂を射出し、冷却固化後、図
2(d)に示すように型開きを開始する。型開き初期に
は、スプリング8の伸びる力のために外部キャビティ5
がコア側に押されるために外部コア2と外部キャビティ
5とにより形成されるパーティングは開かない。
The mold clamping is started from the state of FIG. 2A, and when the mold clamping is completed, the state becomes as shown in FIG. 2B, and the spring 8 is pushed in the compression direction by the mold clamping force. Next, as shown in FIG. 2C, when the molten resin is injected from the injection hole 3, the film 10 is pressed against the core side by the injection pressure and covers the surface of the molded product. A predetermined amount of resin is injected, and after cooling and solidification, mold opening is started as shown in FIG. In the initial stage of mold opening, the external cavity 5 is caused by the expanding force of the spring 8.
Is pushed to the core side, the parting formed by the outer core 2 and the outer cavity 5 does not open.

【0014】次に、図2(e)に示すようにスプリング
8が伸びきる前に射出成形機の突き出し機構を作動させ
突き出しプレート6を押し出す。この時、成形品端部の
フィルム不要部分は剪断により切断される。その後、図
2(f)に示すように突き出しプレート6を戻すととも
に所定量まで型開きすると、成形品周縁部のフィルム不
要部分がトリミングされた製品が得られた。
Next, as shown in FIG. 2 (e), before the spring 8 is fully extended, the ejection mechanism of the injection molding machine is operated to push out the ejection plate 6. At this time, the film unnecessary portion at the end of the molded product is cut by shearing. Thereafter, as shown in FIG. 2 (f), the ejection plate 6 was returned and the mold was opened to a predetermined amount to obtain a product in which the film unnecessary portion of the peripheral portion of the molded product was trimmed.

【0015】実施例2 図3に本発明の別の実施例を示す。コア部は、内部コア
1とこの内部コア1と嵌合しスライド可能な外部コア2
を図3(a)に示すようにスプリング7で結合する。キ
ャビティ部は、射出孔3を備える内部キャビティ4と内
部キャビティ4と嵌合しスライド可能な外部キャビティ
5を図3(a)に示すようにスプリング8により結合す
る。なお、スプリング7および8は、常に縮小方向へ力
を発生するように設定した。また、内部コア1と内部キ
ャビティ4のあたり面の一部および外部コア2と外部キ
ャビティ5のあたり面の一部にそれぞれ電磁石11を設
けた。コア部とキャビティ部との間に加飾用フィルム1
0を設置し、型締めを開始する。
Embodiment 2 FIG. 3 shows another embodiment of the present invention. The core portion is composed of an inner core 1 and an outer core 2 which is fitted with the inner core 1 and is slidable.
Are connected by a spring 7 as shown in FIG. In the cavity portion, an inner cavity 4 having an injection hole 3 and an outer cavity 5 that is fitted into the inner cavity 4 and is slidable are coupled by a spring 8 as shown in FIG. The springs 7 and 8 were set so as to always generate a force in the contracting direction. Further, the electromagnets 11 are provided on part of the contact surfaces of the inner core 1 and the inner cavity 4 and on part of the contact surfaces of the outer core 2 and the outer cavity 5, respectively. Decorative film 1 between the core part and the cavity part
Set 0 and start mold clamping.

【0016】図3(b)に型締め完了時の状態を示す。
型締めを完了した後、溶融樹脂を射出孔3より所定量射
出すると図3(c)に示すようにフィルム10がコア側
に押しつけられ樹脂成形品表面を覆う。冷却固化後、電
磁石11に通電し、内部コア1と内部キャビティ4およ
び外部コア2と外部キャビティ5の相対位置が移動しな
いように固定した後、図3(d)に示すように型開きを
開始する。
FIG. 3B shows a state at the time of completion of mold clamping.
After the mold clamping is completed, when a predetermined amount of molten resin is injected from the injection hole 3, the film 10 is pressed against the core side to cover the surface of the resin molded product as shown in FIG. After being cooled and solidified, the electromagnet 11 is energized and fixed so that the relative positions of the inner core 1 and the inner cavity 4 and the outer core 2 and the outer cavity 5 do not move, and then the mold opening is started as shown in FIG. 3D. To do.

【0017】この時、電磁石11により内部コア1と内
部キャビティ4および外部コア2と外部キャビティ5は
それぞれ引き合うために型開きすること無く、スプリン
グ7および8の縮小しようとする力に逆らって図3
(d)に示すように内部コア1と内部キャビティ4によ
り形成されるパーティングと外部コア2と外部キャビテ
ィ5により形成されるパーティングの相対位置が移動
し、剪断により成形品端部のフィルム不要部分を切断す
る。
At this time, the inner core 1 and the inner cavity 4 and the outer core 2 and the outer cavity 5 are attracted to each other by the electromagnet 11, so that the molds do not open and the springs 7 and 8 resist the force of contraction.
As shown in (d), the relative positions of the parting formed by the inner core 1 and the inner cavity 4 and the parting formed by the outer core 2 and the outer cavity 5 are moved, and a film at the end of the molded product is unnecessary due to shearing. Cut the part.

【0018】その後、電磁石11への通電を停止すると
スプリング7および8の復元力により図3(e)に示す
ように内部コア1及び外部キャビティ5は所定の位置に
戻る。さらに型開きを続行し、図3(f)に示すように
製品を取り出すと端部のフィルム不要部分がトリミング
された製品が得られた。
After that, when the energization of the electromagnet 11 is stopped, the restoring force of the springs 7 and 8 causes the inner core 1 and the outer cavity 5 to return to predetermined positions as shown in FIG. 3 (e). Further, the mold opening was continued and the product was taken out as shown in FIG. 3 (f) to obtain a product in which the film unnecessary portion at the end was trimmed.

【0019】実施例3 図4に本発明のさらに別の実施例を示す。コア部は、内
部コア1とこの内部コア1と嵌合しスライド可能な外部
コア2を図4(a)に示すようにスプリング7で結合す
る。キャビティ部は、射出孔3を備える内部キャビティ
4とこの内部キャビティ4と嵌合しスライド可能な外部
キャビティ5を図4(a)に示すようにスプリング8に
より結合する。なお、スプリング7は常に縮小方向へ力
を発生するように設定し、スプリング8は力がかからな
い場合は図4(a)に示す位置にある位置になるように
設定する。また、内部コア1と内部キャビティ4のあた
り面に一部に電磁石11を設けた。コア部とキャビティ
部の間に加飾用フィルム10を設置し、型締めを開始す
る。
Embodiment 3 FIG. 4 shows still another embodiment of the present invention. The core portion connects the inner core 1 and the outer core 2 which is fitted with the inner core 1 and is slidable, by a spring 7 as shown in FIG. 4A. In the cavity portion, an internal cavity 4 having an injection hole 3 and an external cavity 5 that is fitted into the internal cavity 4 and is slidable are connected by a spring 8 as shown in FIG. 4A. The spring 7 is set to always generate a force in the contracting direction, and the spring 8 is set to the position shown in FIG. 4A when no force is applied. Further, an electromagnet 11 is partially provided on the contact surface between the inner core 1 and the inner cavity 4. The decorative film 10 is placed between the core portion and the cavity portion, and the mold clamping is started.

【0020】図4(b)に型締め完了時の状態を示す。
型締めが完了した後、溶融樹脂を射出孔3より所定量射
出すると図4(c)に示すようにフィルム10がコア側
に押しつけられ樹脂成形品表面を覆う。冷却固化後、電
磁石11に通電し、内部コア1と内部キャビティ4およ
び外部コア2と外部キャビティ5の相対位置が移動しな
いように固定した後、図4(d)に示すように型開きを
開始する。この時、電磁石11により内部コア1と内部
キャビティ4とは引き合うために型開きすること無く、
スプリング力7の縮小しようとする力に逆らって内部コ
ア1と外部コア2とが相対的に移動する。さらに、内部
キャビティ4と外部キャビティ5はスプリング8の復元
力により相対的に移動する。
FIG. 4 (b) shows the state at the completion of mold clamping.
After the mold clamping is completed, when a predetermined amount of molten resin is injected through the injection hole 3, the film 10 is pressed against the core side to cover the surface of the resin molded product as shown in FIG. 4 (c). After cooling and solidifying, the electromagnet 11 is energized and fixed so that the relative positions of the inner core 1 and the inner cavity 4 and the outer core 2 and the outer cavity 5 do not move, and then the mold opening is started as shown in FIG. 4 (d). To do. At this time, since the inner core 1 and the inner cavity 4 are attracted to each other by the electromagnet 11, the mold is not opened,
The inner core 1 and the outer core 2 move relative to each other against the force of the spring force 7 to be reduced. Further, the inner cavity 4 and the outer cavity 5 relatively move due to the restoring force of the spring 8.

【0021】その際、図4(d)に示すように内部コア
1と内部キャビティ4により形成されるパーティングと
外部コア2と外部キャビティ5により形成されるパーテ
ィングの相対位置が移動し、剪断により成形品端部のフ
ィルム不要部分を切断する。その後、電磁石11への通
電を停止するとスプリング7の復元力により図4(e)
に示すように内部コア1は所定の位置に戻る。さらに型
開きを続行し、図4(f)に示すように製品を取り出す
と端部のフィルム不要部分がトリミングされた製品が得
られた。
At this time, as shown in FIG. 4 (d), the relative positions of the parting formed by the inner core 1 and the inner cavity 4 and the parting formed by the outer core 2 and the outer cavity 5 are moved to cause shearing. The film unnecessary portion at the end of the molded product is cut by. After that, when the energization of the electromagnet 11 is stopped, the restoring force of the spring 7 causes the electric field shown in FIG.
The inner core 1 returns to a predetermined position as shown in FIG. Further, the mold opening was continued and the product was taken out as shown in FIG. 4 (f) to obtain a product in which the film unnecessary portion at the end was trimmed.

【0022】実施例4 図5に本発明のさらに別の実施例を示す。図5(a)に
示す射出圧縮成形装置においてコア部は、内部コア1と
この内部コア1と嵌合しスライド可能な外部コア2とを
図5(a)に示すようにスプリング7で結合する。キャ
ビティ部は、射出孔3を備える内部キャビティ4とこの
内部キャビティ4と嵌合しスライド可能な外部キャビテ
ィ5とを図5(a)に示すようにスプリング8により結
合する。なお、スプリング7および8は常に縮小方向へ
力を発生するように設定した。また、内部コア1と内部
キャビティ4のあたり面の一部および外部コア2と外部
キャビティ5のあたり面の一部にそれぞれ電磁石11を
設けた。
Embodiment 4 FIG. 5 shows still another embodiment of the present invention. In the injection compression molding apparatus shown in FIG. 5A, the core portion connects the inner core 1 and the outer core 2 which is fitted to the inner core 1 and is slidable by the spring 7 as shown in FIG. 5A. . In the cavity portion, an internal cavity 4 having an injection hole 3 and an external cavity 5 that fits into the internal cavity 4 and is slidable are connected by a spring 8 as shown in FIG. The springs 7 and 8 were set so as to always generate a force in the contracting direction. Further, the electromagnets 11 are provided on part of the contact surfaces of the inner core 1 and the inner cavity 4 and on part of the contact surfaces of the outer core 2 and the outer cavity 5, respectively.

【0023】コア部とキャビティ部の間に加飾用フィル
ム10を設置し、図5(b)に示すように射出孔3より
溶融樹脂を射出し型締めを開始する。図5(c)に圧縮
(型締め)完了時の状態を示す。型締めが完了した後、
フィルム10がコア側に押しつけられ樹脂成形品表面を
覆う。冷却固化後、電磁石11に通電し、内部コア1と
内部キャビティ4および外部コア2と外部キャビティ5
の相対位置が移動しないように固定した後、図5(d)
に示すように型開きを開始する。
The decorative film 10 is placed between the core portion and the cavity portion, and molten resin is injected from the injection hole 3 to start the mold clamping as shown in FIG. 5 (b). FIG. 5C shows a state at the time of completion of compression (mold clamping). After the mold clamping is completed,
The film 10 is pressed against the core side and covers the surface of the resin molded product. After cooling and solidifying, the electromagnet 11 is energized, and the inner core 1 and the inner cavity 4 and the outer core 2 and the outer cavity 5
After fixing so that the relative position of does not move, FIG. 5 (d)
The mold opening is started as shown in.

【0024】この時、電磁石11により内部コア1と内
部キャビティ4および外部コア2と外部キャビティ5は
それぞれ引き合うために型開きすること無く、スプリン
グ7および8の縮小しようとする力に逆らって図5
(d)に示すように内部コア1と内部キャビティ4によ
り形成されるパーティングと外部コア2と外部キャビテ
ィ5により形成されるパーティングの相対位置が移動
し、剪断により成形品端部のフィルム不要部分を切断す
る。
At this time, the inner core 1 and the inner cavity 4 and the outer core 2 and the outer cavity 5 are attracted to each other by the electromagnet 11, so that the molds do not open and the springs 7 and 8 resist the force of contraction.
As shown in (d), the relative positions of the parting formed by the inner core 1 and the inner cavity 4 and the parting formed by the outer core 2 and the outer cavity 5 are moved, and a film at the end of the molded product is unnecessary due to shearing. Cut the part.

【0025】その後、電磁石11への通電を停止すると
スプリング7および8の復元力により図5(e)に示す
ように内部コア1および外部キャビティ5は所定の位置
に戻る。さらに型開きを続行し、図5(f)に示すよう
に製品を取り出すと端部のフィルム不要部分がトリミン
グされた製品が得られた。
After that, when the power supply to the electromagnet 11 is stopped, the restoring force of the springs 7 and 8 causes the inner core 1 and the outer cavity 5 to return to their predetermined positions as shown in FIG. 5 (e). Further, the mold opening was continued and the product was taken out as shown in FIG. 5 (f) to obtain a product in which the film unnecessary portion at the end was trimmed.

【0026】[0026]

【発明の効果】本発明の成形金型によれば、通常の射出
成形または射出圧縮成形と同様の工程で表面がフィルム
で覆われ、周縁部が成形品形状に合わせてフィルム不要
部分がトリミングされた製品が得られる。製品の形状が
3次元的な周縁部を有するとしても適切な金型を設計す
ることにより、単純な形状の部品と同様に製造すること
ができる。従って本発明の成形方法によれば、製品形状
に依存することなく、通常のフィルムインサート成形で
必要なトリミングのための後工程が不必要となり、全工
程の短縮となる。また、適切なフィルムと射出条件を選
択することにより、予備成形を行うことなくフィルムイ
ンサート成形を行うことが可能である。このようなこと
から本発明の成形金型を用いることによりフィルムイン
サート成形品の全工程の短縮でき、製品コストの低減が
可能である。
According to the molding die of the present invention, the surface is covered with a film and the peripheral portion is trimmed at the unnecessary portion of the film in accordance with the shape of the molded product in the same process as in ordinary injection molding or injection compression molding. Products are obtained. Even if the shape of the product has a three-dimensional peripheral portion, by designing an appropriate mold, the product can be manufactured in the same manner as a part having a simple shape. Therefore, according to the molding method of the present invention, the post-process for trimming which is necessary in the normal film insert molding is unnecessary irrespective of the product shape, and the whole process is shortened. Further, by selecting an appropriate film and injection conditions, it is possible to perform film insert molding without performing preforming. Therefore, by using the molding die of the present invention, it is possible to shorten the entire process of the film insert molded product and reduce the product cost.

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

【図1】本発明のトリミング機構の概念を示すための成
形金型断面図である。
FIG. 1 is a sectional view of a molding die for showing the concept of a trimming mechanism of the present invention.

【図2】本発明のフィルムインサート成形用金型構造と
成形工程の一例を示す断面図である。
FIG. 2 is a cross-sectional view showing an example of a film insert molding die structure of the present invention and a molding process.

【図3】本発明のフィルムインサート成形用金型構造と
成形工程の一例を示す断面図である。
FIG. 3 is a cross-sectional view showing an example of a film insert molding die structure of the present invention and a molding process.

【図4】本発明のフィルムインサート成形用金型構造と
成形工程の一例を示す断面図である。
FIG. 4 is a cross-sectional view showing an example of a film insert molding die structure of the present invention and a molding step.

【図5】本発明のフィルムインサート成形用金型構造と
成形工程の一例を示す断面図である。
FIG. 5 is a cross-sectional view showing an example of a film insert molding die structure of the present invention and a molding step.

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B29C 33/00 - 33/76 B29C 39/26 - 39/36 B29C 41/38 - 41/44 B29C 43/36 - 43/42 B29C 43/50,45/26 - 45/44 B29C 45/64 - 45/68,45/73 B29C 49/48 - 49/56,49/70 B29C 51/31 - 51/40,51/44 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B29C 33/00-33/76 B29C 39/26-39/36 B29C 41/38-41/44 B29C 43 / 36-43/42 B29C 43 / 50,45 / 26-45/44 B29C 45/64-45 / 68,45 / 73 B29C 49/48-49 / 56,49 / 70 B29C 51/31-51/40, 51/44

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 製品に許容される余りフィルム幅と同等
幅のエッジ部を有する凹型の内部型と該内部型と嵌合し
てスライド可能な凹型の外部型とからなるコアと、樹脂
射出孔を有する凸型の内部型と該内部型とスライド可能
な凹型の外部型とからなるキャビティとを備えることを
特徴とするフィルムインサート成形用金型。
1. A core comprising a concave internal mold having an edge portion having a width equal to a surplus film width allowed for a product, and a concave external mold which is slidable by fitting with the internal mold, and a resin injection hole. A mold for film insert molding, comprising: a convex internal mold having: and a cavity formed of the internal mold and a slidable concave external mold.
【請求項2】 請求項1記載のフィルムインサート成形
用金型において、コアとキャビティとの間にフィルム表
面を前記コア側に、裏面を前記キャビティ側にして設置
した後、型締めし、溶融樹脂を射出または射出圧縮し、
冷却固化した後、フィルム表面側から凹型の内部型のエ
ッジ部がフィルムを押し切るように内部型と外部型とを
相対的に移動させ、型開きした後、成形品を取り出すこ
とを特徴とするフィルムインサート成形方法。
2. The film insert molding die according to claim 1, wherein a film front surface is placed on the core side and a back surface is placed on the cavity side between the core and the cavity, and then the die is clamped to melt the molten resin. Injection or injection compression,
After cooling and solidifying, the inner mold and the outer mold are relatively moved so that the edge portion of the concave inner mold pushes the film from the film surface side, the mold is opened, and the molded product is taken out. Insert molding method.
JP04457496A 1996-03-01 1996-03-01 Mold for film insert molding and molding method thereof Expired - Fee Related JP3467955B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04457496A JP3467955B2 (en) 1996-03-01 1996-03-01 Mold for film insert molding and molding method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04457496A JP3467955B2 (en) 1996-03-01 1996-03-01 Mold for film insert molding and molding method thereof

Publications (2)

Publication Number Publication Date
JPH09234769A JPH09234769A (en) 1997-09-09
JP3467955B2 true JP3467955B2 (en) 2003-11-17

Family

ID=12695285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04457496A Expired - Fee Related JP3467955B2 (en) 1996-03-01 1996-03-01 Mold for film insert molding and molding method thereof

Country Status (1)

Country Link
JP (1) JP3467955B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19914092C2 (en) * 1998-04-23 2001-10-04 Daimler Chrysler Ag Method and device for producing a trim and trim part and trim and trim part produced thereafter
JP2011207022A (en) 2010-03-30 2011-10-20 Nec Personal Products Co Ltd Injection molding device, injection molding method and housing

Also Published As

Publication number Publication date
JPH09234769A (en) 1997-09-09

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