JPH06304945A - Stamping mold and stamping molding method - Google Patents

Stamping mold and stamping molding method

Info

Publication number
JPH06304945A
JPH06304945A JP5097984A JP9798493A JPH06304945A JP H06304945 A JPH06304945 A JP H06304945A JP 5097984 A JP5097984 A JP 5097984A JP 9798493 A JP9798493 A JP 9798493A JP H06304945 A JPH06304945 A JP H06304945A
Authority
JP
Japan
Prior art keywords
mold
resin
skin material
gate
stamping
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.)
Granted
Application number
JP5097984A
Other languages
Japanese (ja)
Other versions
JP3314979B2 (en
Inventor
Yukitoshi Hattori
幸年 服部
Masato Matsumoto
正人 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hayashi Telempu Corp
Sumitomo Chemical Co Ltd
Original Assignee
Hayashi Telempu Corp
Sumitomo Chemical Co Ltd
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 Hayashi Telempu Corp, Sumitomo Chemical Co Ltd filed Critical Hayashi Telempu Corp
Priority to JP09798493A priority Critical patent/JP3314979B2/en
Publication of JPH06304945A publication Critical patent/JPH06304945A/en
Application granted granted Critical
Publication of JP3314979B2 publication Critical patent/JP3314979B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To enhance the flowability of the resin in a mold at a time of molding. CONSTITUTION:A stamping mold has a pair of upper and lower molds 1, 4 mutually meshed so as to form a predetermined cavity 7 and a plurality of gates 6 guiding a resin to the cavity surface 7a of the lower mold 4 are formed to the lower mold 4. The hole 1a receiving a push element 2 having an area perfectly covering the gates 6 formed to the cavity surface 7a of the lower mold is formed to the cavity surface 7b of the upper mold 1. The projecting means 3 projecting the push element 2 to the cavity surface 7a of the upper mold is provided in the hole 1a and the push element 2 is received in the hole 1a by the action of a projecting means 3 at a time of the mold clamping of the upper and lower molds.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業の利用分野】本発明は、スタンピング成形用型お
よびスタンピング成形方法に係り、特に型内での熱可塑
性樹脂の流動性を高めるスタンピング成形用型およびス
タンピング成形方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamping molding die and a stamping molding method, and more particularly to a stamping molding die and a stamping molding method for increasing the fluidity of a thermoplastic resin in the die.

【0002】[0002]

【従来の技術】従来、自動車のドアトリム,パッケージ
トレイトリム等において、熱可塑性樹脂と表皮材を積層
し、所望の形に成形した内装材が広く用いられている。
2. Description of the Related Art Conventionally, in automobile door trims, package tray trims, etc., an interior material formed by laminating a thermoplastic resin and a skin material and molding it into a desired shape has been widely used.

【0003】このような内装材を得るために種々の成形
方法が考えられ、このうち表皮材と基材の積層と同時に
基材の成形を行うスタンピング成形方法がある。これ
は、工程数の低減という面で有効な方法であり、以下の
ような方法で行われている。
Various molding methods are conceivable for obtaining such an interior material, and among them, there is a stamping molding method in which a base material is formed at the same time when a skin material and a base material are laminated. This is an effective method in terms of reducing the number of steps, and is performed by the following method.

【0004】すなわち、作業者はまず所定のキャビティ
をもって噛合する一対の上型と下型を型開きした状態に
て、溶融した熱可塑性樹脂を下型上に供給する。この熱
可塑性樹脂の供給は、下型面内に樹脂押出し装置と連通
するように設けられたゲートを開閉することで行われ
る。
That is, an operator first supplies a molten thermoplastic resin onto the lower mold in a state where a pair of upper mold and lower mold which are engaged with each other with a predetermined cavity are opened. The supply of the thermoplastic resin is performed by opening and closing a gate provided in the lower mold surface so as to communicate with the resin extruding device.

【0005】次いで上下型間に表皮材を一定の張力で広
げて配置し、型締めを徐々に進行させる。これにより、
表皮材と溶融樹脂が接触し、さらに溶融樹脂は表皮材と
下型の間でキャビティ内に押し広げられ、この溶融温度
より低い温度の型に接することで硬化する。
Next, a skin material is spread between the upper and lower dies with a constant tension, and the dies are gradually clamped. This allows
The skin material and the molten resin come into contact with each other, and the molten resin is spread into the cavity between the skin material and the lower mold, and is cured by coming into contact with the mold having a temperature lower than the melting temperature.

【0006】そして表皮材と溶融樹脂の積層が完了した
時点で、作業者は上下型間の型開きを行い、製品を取り
出す。
When the lamination of the skin material and the molten resin is completed, the operator opens the mold between the upper and lower molds and takes out the product.

【0007】したがって以上の方法によれば、基材の成
形と表皮材の積層が同時に可能であり、また基材と表皮
材との積層に接着剤などを必要としないので、工数の低
減が可能となる。また、型締め圧も40〜100Kg/
cm2と小さくできる。
Therefore, according to the above method, the molding of the base material and the lamination of the skin material can be performed at the same time, and since an adhesive or the like is not required for laminating the base material and the skin material, the number of steps can be reduced. Becomes Also, the mold clamping pressure is 40 to 100 kg /
Can be as small as cm 2 .

【0008】[0008]

【発明が解決しようとする課題】しかしながら上記従来
技術にかかるスタンピング成形方法においては、成形時
の型内での樹脂の流動性が悪いと以下のような種々の問
題点が生じる。
However, in the stamping molding method according to the above-mentioned prior art, if the fluidity of the resin in the mold during molding is poor, the following various problems occur.

【0009】(1)溶融樹脂がキャビティ内全体に行き
渡らないうちに型によって冷却されて硬化してしまい、
成形品が欠陥となる。
(1) The molten resin is cooled and hardened by the mold before it reaches the entire cavity,
The molded product becomes defective.

【0010】(2)樹脂の流動不良によって成形品に歪
みが残ったり、成形品の板厚がばらついたりする。
(2) Distortion remains in the molded product due to poor flow of the resin, or the plate thickness of the molded product varies.

【0011】(3)溶融樹脂がキャビティ内全体に行き
渡るまでに時間がかかる為、生産タクトが長くなる。
(3) Since it takes time for the molten resin to reach the entire cavity, the production tact becomes long.

【0012】(4)熱可塑性樹脂の流動性を高める為に
樹脂の溶融温度を高くする方法が考えられるが、ゲート
近傍では樹脂が長時間に留まるので、積層する表皮材が
熱によるダメージを受ける。
(4) A method of raising the melting temperature of the resin can be considered in order to increase the fluidity of the thermoplastic resin, but since the resin remains for a long time near the gate, the laminated skin material is damaged by heat. .

【0013】(5)型締め圧力を高くすると、熱可塑性
樹脂の流動性は高めるが、表皮材がその圧力によりダメ
ージを受ける。
(5) When the mold clamping pressure is increased, the fluidity of the thermoplastic resin is increased, but the skin material is damaged by the pressure.

【0014】(6)表皮材として、特に耐熱性の良いグ
レードを使う必要があり、コストが向上する。
(6) As the skin material, it is necessary to use a grade having particularly good heat resistance, and the cost is improved.

【0015】以上のような問題点はゲートの数に関係無
く起こり得るが、ゲートが複数設けられた場合にはしわ
が生じることがある。図5は従来のスタンピング成形型
にゲートが2つ設けてある場合の樹脂の流れを示す図で
あり、(a)は下型キャビティ面に樹脂が供給されたと
きの上面図、(b)は表皮材に樹脂を積層して成形した
際の断面図である。
The above problems may occur regardless of the number of gates, but wrinkles may occur when a plurality of gates are provided. FIG. 5 is a diagram showing a resin flow when a conventional stamping molding die is provided with two gates, (a) is a top view when the resin is supplied to the cavity surface of the lower die, and (b) is a diagram. It is sectional drawing at the time of laminating and molding resin on a surface material.

【0016】この図に示すように、下型101の下型キ
ャビティ面101aの異なる位置に形成されたゲート1
03から供給された樹脂102どうしがぶつかる部位に
おいて、積層する表皮材104にしわ105が生じやす
くなるという問題点がある。本発明は、上記従来技術の
有する種々の問題点に鑑みてなされたものであって、成
形時の型内の樹脂の流動性を高めることができるスタン
ピング成形用型およびスタンピング成形方法。
As shown in this figure, the gates 1 formed at different positions on the lower mold cavity surface 101a of the lower mold 101.
There is a problem that wrinkles 105 are likely to occur in the laminated skin material 104 at a portion where the resins 102 supplied from 03 collide with each other. The present invention has been made in view of the above-mentioned various problems of the prior art, and a stamping molding die and a stamping molding method capable of increasing the fluidity of a resin in a die during molding.

【0017】[0017]

【課題を解決するための手段】上記目的を達成するため
の本発明は、所定のキャビティをもって噛み合う一対の
上型と下型を有し、上下型間にて熱可塑性樹脂と表皮材
を積層すると同時に成形するためのスタンピング成形用
型において、下型キャビティ面内に設けられ、熱可塑性
樹脂を導く単数または複数のゲートと、少なくとも前記
ゲートの直上を含む上型キャビティ面に突出、収容可能
に設けられ、前記ゲートを覆いつくす面積を有する押子
とが備えられていることを特徴とし、前記押子が複数の
ゲートの各ゲートに独立して設けられていることを特徴
とするものや、前記押子が複数のゲートの各ゲートのう
ち、少なくとも2つのゲートに共通して設けられている
ことを特徴とするものでもよい。
The present invention for achieving the above object has a pair of an upper mold and a lower mold which are engaged with each other with a predetermined cavity, and when a thermoplastic resin and a skin material are laminated between the upper and lower molds. In a stamping molding die for molding at the same time, a single or a plurality of gates, which are provided in the lower mold cavity surface and guide the thermoplastic resin, and an upper mold cavity surface including at least immediately above the gate, are provided so that they can be housed. And a presser having an area that covers the gate, the presser being provided independently for each gate of the plurality of gates, and The pusher may be provided in common to at least two gates of the plurality of gates.

【0018】また、所定のキャビティをもって噛み合う
一対の上型と下型を型開きした状態にて、上下型間に表
皮材を供給し、次いで溶融した熱可塑性樹脂を下型キャ
ビティ面に供給し、その後型締めすることで樹脂をキャ
ビティ内に押し広げ、樹脂を冷却、固化させて成形する
スタンピング成形方法において、完全に型締めする前
に、少なくともゲート上の表皮材上面を押子により押す
ことを特徴とする方法や、さらに、所定のキャビティを
もって噛み合う一対の上型と下型を型開きした状態に
て、上下型間に表皮材を供給し、次いで溶融した熱可塑
性樹脂を下面キャビティ面に供給し、その後型締めする
ことで樹脂をキャビティ内に押し広げ、樹脂を冷却、固
化させて成形するスタンピング成形方法において、下型
に設けたゲートに対向して設けられている押子のゲート
側面にあらかじめ第1の表皮材を保持させた後、完全に
型締めする前に、少なくともゲート上の第2の表皮材上
面を押子により押すことを特徴とする方法でもよい。
Further, in a state where a pair of upper mold and lower mold which are engaged with each other with a predetermined cavity are opened, a skin material is supplied between the upper and lower molds, and then a molten thermoplastic resin is supplied to the lower mold cavity surface. After that, in the stamping molding method in which the resin is expanded into the cavity by mold clamping and the resin is cooled and solidified, it is necessary to press at least the upper surface of the skin material on the gate with the pusher before completely clamping the mold. In addition to the characteristic method, with a pair of upper mold and lower mold that engage with each other with a predetermined cavity opened, a skin material is supplied between the upper and lower molds, and then a molten thermoplastic resin is supplied to the lower cavity surface. Then, the mold is clamped to spread the resin into the cavity, and the resin is cooled and solidified to form the stamping molding method. After holding the first skin material on the gate side surface of the pusher provided in advance, before pressing the mold completely, at least the upper surface of the second skin material on the gate is pushed by the pusher. You can also do

【0019】[0019]

【作用】上記のとおり構成された本発明では、表皮材を
介して上下型間を型締めしていくとき、下型キャビティ
面内に設けた単数または複数のゲートから溶融状態にあ
る熱可塑性樹脂を供給し、完全な型締め前に、少なくと
も前記ゲートの直上を含む上型キャビティ面に突出、収
納自在に設けられた押子により型締めにしたがってゲー
ト付近に滞留している樹脂を押し付けるので、樹脂がキ
ャビティの周端に短時間で押し広がる。
In the present invention configured as described above, when the upper mold and the lower mold are clamped with the skin material, the thermoplastic resin melted from the gate or gates provided in the cavity surface of the lower mold. Is supplied, before complete mold clamping, the resin retained in the vicinity of the gate is pressed according to the mold clamping by the presser provided so as to project onto the cavity surface of the upper mold including at least immediately above the gate and accommodated. The resin spreads over the peripheral edge of the cavity in a short time.

【0020】[0020]

【実施例】次に本発明の実施例について図面を参照して
説明する。
Embodiments of the present invention will now be described with reference to the drawings.

【0021】図1は本発明のスタンピング成形用型の一
実施例を示した概略断面図である。本発明のスタンピン
グ成形用型は所定のキャビティ7をもって噛み合う一対
の上型1と下型4を有しており、図1に示すように下型
4には下型キャビティ面7aに樹脂を導く複数のゲート
6が形成されている。ゲート6には樹脂を供給するため
の、型外に設けられる不図示の押し出し装置と樹脂供給
路5を介して連通されている。樹脂供給路5内部にはゲ
ート6を遮断する不図示のゲート遮断手段が設けられて
おり、そのゲート遮断手段の駆動により樹脂の供給が停
止される。
FIG. 1 is a schematic sectional view showing an embodiment of a stamping molding die of the present invention. The stamping molding die of the present invention has a pair of an upper die 1 and a lower die 4 which are engaged with each other with a predetermined cavity 7. As shown in FIG. 1, the lower die 4 has a plurality of parts for guiding resin to the lower die cavity surface 7a. Gate 6 is formed. The gate 6 is communicated with an unillustrated pusher device provided outside the mold for supplying resin through the resin supply path 5. Inside the resin supply path 5, a gate blocking means (not shown) for blocking the gate 6 is provided, and the driving of the gate blocking means stops the resin supply.

【0022】一方、上型キャビティ面7bには穴1aが
形成され、穴1aにはゲート6を覆いつくす面積を有す
る押子2が突出手段3を介して収納自在とされている。
この突出手段3により押子2は上下型間の型締め時に穴
1a内に収容される。突出手段3は、ばね等の弾性体や
制御部からの指令により型締め動作に応じて押子を徐々
に穴に引き込むものが考えられる。
On the other hand, a hole 1a is formed in the upper mold cavity surface 7b, and a pusher 2 having an area for covering the gate 6 can be housed in the hole 1a through a projecting means 3.
By this projecting means 3, the pusher 2 is housed in the hole 1a when the upper and lower dies are clamped. It is conceivable that the protrusion means 3 gradually pulls the pusher into the hole according to the mold clamping operation in response to a command from the elastic body such as a spring or the control unit.

【0023】なお、図1では2個のゲートを有し、両ゲ
ートに共通の押子を設けた例が示されているが、ゲート
は1個のみであってもよく、各ゲートにそれぞれ独立し
て押子が設けられていてもよい。
Although FIG. 1 shows an example in which two gates are provided and a common pusher is provided for both gates, only one gate may be provided, and each gate is independent. Then, a pusher may be provided.

【0024】次に上記スタンピング成形用型を用いた成
形方法について説明する。図2は本発明のスタンピング
成形用型の一実施例を用いた成形工程を示す断面図であ
る。まず、図2(a)に示すように上型1と下型4を型
開きし、かつ上型キャビティ面7bより押子2を突出さ
せた状態で、上下型間に表皮材8を配置する。この表皮
材8としては、ポリ塩化ビニルなどの熱可塑性樹脂シー
ト、ポリオレフィン系もしくはスチレン系などの熱可塑
性エラストマーからなるシート、各種素材からなる織
物、編物、不織布などを用いることができ、これらシー
トの裏面にポリオレフィン系発泡シート、ウレタン系発
泡シート、ポリ塩化ビニル系発泡シートなどの発泡シー
トを積層した複合シートを用いることができる。なかで
も2層のものが好ましく、例えば、各種ファブリックや
エラストマーシートの裏面にポリプロピレンフォームを
裏打ちしたものがある。これは意匠性とクッション性を
兼ね備えた表皮材となる。またポリプロピレンフォーム
は独立気泡を有し、非通気性のもので、厚さ3mm、密
度0.6〜0.8g/cm3から0.03〜0.09g
/cm3(10〜30倍発泡)程度のものを用いる。
Next, a molding method using the stamping molding die will be described. FIG. 2 is a sectional view showing a molding process using an embodiment of the stamping molding die of the present invention. First, as shown in FIG. 2A, the upper mold 1 and the lower mold 4 are opened, and the skin material 8 is arranged between the upper and lower molds with the presser 2 protruding from the upper mold cavity surface 7b. . As the skin material 8, a thermoplastic resin sheet such as polyvinyl chloride, a sheet made of a thermoplastic elastomer such as polyolefin or styrene, a woven fabric, a knitted fabric or a non-woven fabric made of various materials can be used. A composite sheet in which a foam sheet such as a polyolefin foam sheet, a urethane foam sheet, or a polyvinyl chloride foam sheet is laminated on the back surface can be used. Of these, a two-layered one is preferable, and for example, there are various fabrics and those having an elastomer sheet backed with polypropylene foam. This is a skin material that has both design and cushioning properties. Polypropylene foam has closed cells and is non-breathable and has a thickness of 3 mm and a density of 0.6 to 0.8 g / cm 3 to 0.03 to 0.09 g.
/ Cm 3 (10 to 30 times foaming) is used.

【0025】次に上下型が開いた状態のまま、不図示の
ゲート手段手段を駆動して下型2のゲート6を開き、図
2(b)に示すように押し出し装置から溶融した熱可塑
性樹脂9を押し出して下型キャビティ面7aに導く。こ
の樹脂は、初期の樹脂温度が190〜210℃程度であ
る。このとき、ある一定温度での樹脂の流れやすさを示
す値であるMI値(メルト・インディックス値)は10
〜100(g/10min)程度である。
Next, with the upper and lower molds open, the gate means means (not shown) is driven to open the gate 6 of the lower mold 2, and the thermoplastic resin melted from the extrusion device as shown in FIG. 2 (b). 9 is pushed out and guided to the lower mold cavity surface 7a. This resin has an initial resin temperature of about 190 to 210 ° C. At this time, the MI value (melt index value), which is a value indicating the flowability of the resin at a certain constant temperature, is 10
It is about 100 (g / 10 min).

【0026】この熱可塑性樹脂としては、例えばポリエ
チレン、ポリプロピレン、ポリスチレン、アクリロニト
リル・スチレン・ブタジエン共重合体、ポリ塩化ビニ
ル、ポリアミド、ポリカーボネート、ポリエチレンテレ
フタレート、ポリブチレンテレフタレート、ポリフェニ
レンエーテル、スチレン・アクリロニトリル共重合体な
どの一般的熱可塑性樹脂、これらの混合物、あるいはこ
れらの熱可塑性樹脂を用いたポリマーアロイなどが挙げ
られる。
Examples of the thermoplastic resin include polyethylene, polypropylene, polystyrene, acrylonitrile / styrene / butadiene copolymer, polyvinyl chloride, polyamide, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyphenylene ether, styrene / acrylonitrile copolymer. And the like, general thermoplastic resins, mixtures thereof, and polymer alloys using these thermoplastic resins.

【0027】また、これらの熱可塑性樹脂は必要に応じ
てタルク、ワラストナイト、ガラス繊維などの無機充填
材を含有していてもよく、もちろん、通常使用される各
種の酸化防止剤、紫外線吸収剤などの各種添加剤や着色
剤を含有していてもよい。そして、型締めが進行するに
つれて、初期において上型キャビティ面7bより突出し
ている押子2が先に表皮材8に接し、表皮材8を介して
下型キャビティ面7aに導かれた溶融状態にある熱可塑
性樹脂9を下型キャビティ面7b全体に押し広げる。
If desired, these thermoplastic resins may contain an inorganic filler such as talc, wollastonite or glass fiber. Of course, various kinds of commonly used antioxidants and ultraviolet absorbers may be used. It may contain various additives such as agents and colorants. Then, as the mold clamping progresses, the pusher 2 projecting from the upper mold cavity surface 7b in the initial stage comes into contact with the skin material 8 first, and is guided to the lower mold cavity surface 7a through the skin material 8 to be in a molten state. A certain thermoplastic resin 9 is spread over the entire lower mold cavity surface 7b.

【0028】図3は本発明のスタンピング成形型を用い
たときの熱可塑性樹脂の広がり方を示した図であり、図
5に示したように押子が無い場合は樹脂はゲートから放
射状に広がり、ゲート近傍にうず高く滞留し、キャビテ
ィ周端への流動性が悪かった。これに対して押子2があ
る場合は、図3に示すようにゲート6直上の押子2が滞
留した樹脂9を押し広げ、樹脂9は押子2に沿って素早
く下型キャビティ面7a周端に到達することが判る。
FIG. 3 is a diagram showing how the thermoplastic resin spreads when the stamping mold of the present invention is used. As shown in FIG. 5, when there is no pusher, the resin spreads radially from the gate. , The vortex stayed high near the gate, and the fluidity to the peripheral edge of the cavity was poor. On the other hand, when the pusher 2 is provided, as shown in FIG. 3, the pusher 2 immediately above the gate 6 spreads out the retained resin 9, and the resin 9 quickly surrounds the lower mold cavity surface 7a along the pusher 2. You can see that you have reached the edge.

【0029】さらに型締めが進行し、図2(c)に示す
ように上下型が完全に閉じた状態では、押子2は上型1
に形成された穴1aに収容される。この押子2は、押子
2を突出させている突出手段3がばね等の弾性体である
場合は型締め時の圧力によって自然に収容できる。また
制御部から指令により油圧アクチュエータなどを操作す
ることによっても収容できる。
When the mold clamping is further advanced and the upper and lower molds are completely closed as shown in FIG. 2 (c), the presser 2 has the upper mold 1
It is accommodated in the hole 1a formed in the. The pusher 2 can be naturally accommodated by the pressure at the time of mold clamping when the projecting means 3 projecting the pusher 2 is an elastic body such as a spring. It can also be accommodated by operating a hydraulic actuator or the like according to a command from the control unit.

【0030】その後、型の温度(40〜60℃)によっ
て熱可塑性樹脂9が冷却・固化した時点で成形品を脱型
する。
Thereafter, when the thermoplastic resin 9 is cooled and solidified by the mold temperature (40 to 60 ° C.), the molded product is released from the mold.

【0031】図4は本発明のスタンピング成形方法の他
の実施例を示した断面図である。
FIG. 4 is a sectional view showing another embodiment of the stamping molding method of the present invention.

【0032】上記実施例では押子により樹脂の流動性を
支援していたが、本実施例では押子が流動性を支援する
とともに他の表皮材を積層する方法について示した。ま
た、本実施例は上記実施例にかかるスタンピング成形用
型と基本的に同様の構成であり、図4においてはキャビ
ティの形状がドアトリムなどの製品の場合を示してい
る。
In the above embodiment, the pusher supported the fluidity of the resin, but in this embodiment, the pusher supports the fluidity and a method of laminating another skin material. In addition, this embodiment has basically the same configuration as the stamping molding die according to the above-mentioned embodiment, and FIG. 4 shows the case where the shape of the cavity is a product such as a door trim.

【0033】この図に示すように、成形品の一般面とは
異なるような第1の表皮材としての装飾用表皮材10を
押子2のゲート6側の端面に予め保持しておく。型締め
を進行する際、第2の表皮材としての表皮材8に接する
装飾用表皮材10の表面には粘着加工を施しておく。そ
して、型締めすることよって表皮材8がゲート6より導
かれた樹脂と積層されるとともに、装飾用表皮材10が
表皮材8上面に接着される。
As shown in this figure, a decorative skin material 10 as a first skin material, which is different from the general surface of the molded product, is held in advance on the end face of the pusher 2 on the gate 6 side. When the mold clamping is advanced, the surface of the decorative skin material 10 in contact with the skin material 8 as the second skin material is subjected to the adhesive processing. Then, by closing the mold, the skin material 8 is laminated with the resin guided from the gate 6, and the decorative skin material 10 is bonded to the upper surface of the skin material 8.

【0034】この実施例では、従来の成形法で行う場合
と比較して装飾用表皮の接着工程が省略できる。また、
成形品の一定の位置に装飾用表皮が接着でき、位置ずれ
がおこらない。
In this embodiment, the step of adhering the decorative skin can be omitted as compared with the case where the conventional molding method is used. Also,
The decorative skin can be adhered to a certain position of the molded product, and the displacement does not occur.

【0035】[0035]

【発明の効果】以上説明したような本発明では、少なく
ともゲートの直上に、そのゲートを覆いつくす面積を有
する押子が備えられているので、以下に記載する効果を
奏する。 (1)押子によって樹脂の流動が促進され、短時間でキ
ャビティ端末まで樹脂が流動する。しかも気体は最終的
に型外に排出され、成形品に中空部を生じたりすること
がない。 (2)生産タクトが短くなる。 (3)熱可塑性樹脂の温度を低くして、また型締め圧を
低くして成形できる。 (4)従来では成形困難であった複雑な形状の成形品が
できる。 (5)樹脂の板厚を薄く成形できる。 (6)(3)により、表皮材にダメージが少なくなる。 (7)特にゲートが2つ以上設けられている場合は、従
来のように表皮材にシワを発生することがなくなる。
According to the present invention as described above, since the pusher having an area covering the gate is provided at least directly above the gate, the following effects can be obtained. (1) The flow of resin is promoted by the presser, and the resin flows to the cavity end in a short time. Moreover, the gas is finally discharged to the outside of the mold and does not cause a hollow portion in the molded product. (2) The production tact becomes shorter. (3) Molding can be performed by lowering the temperature of the thermoplastic resin and lowering the mold clamping pressure. (4) A molded product having a complicated shape, which was difficult to mold in the past, can be obtained. (5) The plate thickness of the resin can be reduced. (6) Due to (3), the skin material is less damaged. (7) In particular, when two or more gates are provided, wrinkles do not occur on the skin material as in the conventional case.

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

【図1】本発明のスタンピング成形用型の一実施例を示
した概略断面図である。
FIG. 1 is a schematic sectional view showing an embodiment of a stamping molding die of the present invention.

【図2】本発明のスタンピング成形用型の一実施例を用
いた成形工程を示す断面図である。
FIG. 2 is a cross-sectional view showing a molding process using an embodiment of a stamping molding die of the present invention.

【図3】本発明のスタンピング成形型を用いたときの熱
可塑性樹脂の広がり方を示した図である。
FIG. 3 is a diagram showing how a thermoplastic resin spreads when a stamping mold of the present invention is used.

【図4】本発明のスタンピング成形方法の他の実施例を
示した断面図である。
FIG. 4 is a sectional view showing another embodiment of the stamping molding method of the present invention.

【図5】従来のスタンピング成形型にゲートが2つ設け
てある場合の樹脂の流れを示し、(a)は下型キャビテ
ィ面に樹脂が供給されたときの上面図であり、(b)は
表皮材に樹脂を積層して成形した際の断面図である。
5A and 5B show a resin flow when a conventional stamping molding die is provided with two gates, FIG. 5A is a top view when resin is supplied to a cavity surface of a lower mold, and FIG. It is sectional drawing at the time of laminating and molding resin on a surface material.

【符号の説明】[Explanation of symbols]

1 上型 1a 穴 2 押子 3 突出手段 4 下型 5 樹脂供給路 6 ゲート 7 キャビティ 7a 下型キャビティ面 7b 上型キャビティ面 8 表皮材 9 熱可塑性樹脂 10 装飾用表皮材 1 Upper Mold 1a Hole 2 Pusher 3 Protrusion Means 4 Lower Mold 5 Resin Supply Channel 6 Gate 7 Cavity 7a Lower Mold Cavity Surface 7b Upper Mold Cavity Surface 8 Skin Material 9 Thermoplastic Resin 10 Decorative Skin Material

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 B29C 43/36 7365−4F // B29L 9:00 4F 31:30 4F ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location B29C 43/36 7365-4F // B29L 9:00 4F 31:30 4F

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 所定のキャビティをもって噛み合う一対
の上型と下型を有し、上下型間にて熱可塑性樹脂と表皮
材を積層すると同時に成形するためのスタンピング成形
用型において、 下型キャビティ面内に設けられ、熱可塑性樹脂を導く単
数または複数のゲートと、 少なくとも前記ゲートの直上を含む上型キャビティ面に
突出、収容可能に設けられ、前記ゲートを覆いつくす面
積を有する押子とが備えられていることを特徴とするス
タンピング成形用型。
1. A stamping molding die for forming a thermoplastic resin and a skin material at the same time by laminating a thermoplastic resin and a skin material between the upper and lower dies, the lower die cavity surface having a pair of upper die and lower die which are engaged with each other with a predetermined cavity. A single or a plurality of gates for guiding the thermoplastic resin, and a pusher having an area for covering and covering the upper mold cavity surface including at least immediately above the gate so as to project and be housed therein. A stamping molding die characterized in that
【請求項2】 押子が複数のゲートの各ゲートに独立し
て設けられていることを特徴とする請求項1に記載のス
タンピング成形用型。
2. The stamping molding die according to claim 1, wherein the presser is provided independently of each of the plurality of gates.
【請求項3】 押子が複数のゲートの各ゲートのうち、
少なくとも2つのゲートに共通して設けられていること
を特徴とする請求項1に記載のスタンピング成形用型。
3. The gate of the plurality of gates having a pusher,
The stamping mold according to claim 1, wherein the stamping mold is provided commonly to at least two gates.
【請求項4】 所定のキャビティをもって噛み合う一対
の上型と下型を型開きした状態にて、上下型間に表皮材
を供給し、次いで溶融した熱可塑性樹脂を下型キャビテ
ィ面に供給し、その後型締めすることで樹脂をキャビテ
ィ内に押し広げ、樹脂を冷却、固化させて成形するスタ
ンピング成形方法において、 完全に型締めする前に、少なくともゲート上の表皮材上
面を押子により押すことを特徴とするスタンピング成形
方法。
4. A skin material is supplied between the upper and lower molds in a state where a pair of upper mold and lower mold which are engaged with each other with a predetermined cavity are opened, and then a molten thermoplastic resin is supplied to the lower mold cavity surface, In the stamping molding method, in which the resin is expanded into the cavity by clamping and then the resin is cooled and solidified, it is necessary to press at least the upper surface of the skin material on the gate with a pusher before completely clamping the mold. Characteristic stamping molding method.
【請求項5】 所定のキャビティをもって噛み合う一対
の上型と下型を型開きした状態にて、上下型間に表皮材
を供給し、次いで溶融した熱可塑性樹脂を下型キャビテ
ィ面に供給し、その後型締めすることで樹脂をキャビテ
ィ内に押し広げ、樹脂を冷却、固化させて成形するスタ
ンピング成形方法において、 下型に設けたゲートに対向して設けられている押子のゲ
ート側面にあらかじめ第1の表皮材を保持させた後、完
全に型締めする前に、少なくともゲート上の第2の表皮
材上面を押子により押すことを特徴とするスタンピング
成形方法。
5. A skin material is supplied between the upper and lower molds in a state where a pair of upper mold and lower mold that are engaged with each other with a predetermined cavity are opened, and then a molten thermoplastic resin is supplied to the lower mold cavity surface, After that, in the stamping molding method in which the resin is expanded into the cavity by clamping and the resin is cooled and solidified, the first side of the gate of the pusher that is provided facing the gate provided in the lower die is previously 1. A stamping molding method, characterized in that, after holding the skin material of No. 1, before the mold is completely clamped, at least the upper surface of the second skin material on the gate is pushed by a pusher.
JP09798493A 1993-04-23 1993-04-23 Stamping molding die and stamping molding method Expired - Fee Related JP3314979B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09798493A JP3314979B2 (en) 1993-04-23 1993-04-23 Stamping molding die and stamping molding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09798493A JP3314979B2 (en) 1993-04-23 1993-04-23 Stamping molding die and stamping molding method

Publications (2)

Publication Number Publication Date
JPH06304945A true JPH06304945A (en) 1994-11-01
JP3314979B2 JP3314979B2 (en) 2002-08-19

Family

ID=14206936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09798493A Expired - Fee Related JP3314979B2 (en) 1993-04-23 1993-04-23 Stamping molding die and stamping molding method

Country Status (1)

Country Link
JP (1) JP3314979B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010023319A (en) * 2008-07-17 2010-02-04 Quadrant Plastic Composites Japan Ltd Stamping molding method and stamping molding mold
JP2015231703A (en) * 2014-06-10 2015-12-24 日立化成株式会社 Method for producing molded part and mold for injection molding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010023319A (en) * 2008-07-17 2010-02-04 Quadrant Plastic Composites Japan Ltd Stamping molding method and stamping molding mold
JP2015231703A (en) * 2014-06-10 2015-12-24 日立化成株式会社 Method for producing molded part and mold for injection molding

Also Published As

Publication number Publication date
JP3314979B2 (en) 2002-08-19

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