JPH04312818A - Compression molding and molding die assembly thereof - Google Patents

Compression molding and molding die assembly thereof

Info

Publication number
JPH04312818A
JPH04312818A JP3078847A JP7884791A JPH04312818A JP H04312818 A JPH04312818 A JP H04312818A JP 3078847 A JP3078847 A JP 3078847A JP 7884791 A JP7884791 A JP 7884791A JP H04312818 A JPH04312818 A JP H04312818A
Authority
JP
Japan
Prior art keywords
molding
slide core
mold
molded product
undercuts
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
JP3078847A
Other languages
Japanese (ja)
Other versions
JP3034326B2 (en
Inventor
Satoshi Tominaga
聡 富永
Yasuhiko Kawanishi
川西 康彦
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP3078847A priority Critical patent/JP3034326B2/en
Publication of JPH04312818A publication Critical patent/JPH04312818A/en
Application granted granted Critical
Publication of JP3034326B2 publication Critical patent/JP3034326B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Abstract

PURPOSE:To prevent deficits from suffering at undercuts due to the escape of gas at molding through small clearances between respective slide core pins and a mold by a method wherein the respective undercuts are produced by the respective slide core pins corresponding to the respective undercuts. CONSTITUTION:The crosssections of respective slide core pins 7, 8 and 9 is circular, since their crosssectional areas are enough as small as those corresponding to respective undercuts 1a, 1b and 1c. Thus the register to a male mold 6 becomes easy, resulting in allowing to design with very small clearance and consequently to hardly eliminate the development of flash and to maintain the durabilities of the respective slide core pins 7, 8 and 9 and of the male mold 6 and preventing deficits from suffering at the undercuts 1a, 1b and 1c after molding, since no accumulation of gas at molding develops due to the escape of the gas through respective clearances.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】  本発明は、型抜き方向に対し
アンダーカットとなる複数個の凹凸を所定箇所に群とし
て有する樹脂成形品を得るための圧縮成形法とそれに用
いる成形金型装置に関するものである。
[Field of Industrial Application] The present invention relates to a compression molding method for obtaining a resin molded product having a plurality of irregularities forming a group of undercuts in a predetermined location in the die cutting direction, and a molding device used therefor. It is.

【0002】0002

【従来の技術】  雄側成形金型と雌側成形金型との間
に、不飽和ポリエステル樹脂等の熱硬化性樹脂を含浸し
た繊維充填熱硬化性樹脂シート材、所謂SMC(シート
・モールディング・コンパウンド)の成形材料を供給し
、圧縮成形を行って「図5」に示すような複数個の凸状
のアンダーカット部1a,1b,1cを群として所定箇
所にを有する圧縮成形品1を成形する場合、アンダーカ
ット部1a,1b,1cは、金型の開閉に伴い金型内部
で摺動するスライドコア機構を用いて形成することが知
られている。ここでは、各アンダーカット部1a,1b
,1cが、これの形成用スライドコアのスライド方向が
何れもC−C矢印で示す同一方向であって、B−B矢印
で示す金型の型抜き方向に対して略90°異なる場合を
示してある。
[Prior Art] A fiber-filled thermosetting resin sheet material impregnated with a thermosetting resin such as unsaturated polyester resin, so-called SMC (sheet molding), is placed between a male molding die and a female molding die. A compression molded product 1 having a plurality of convex undercuts 1a, 1b, 1c grouped together at predetermined locations as shown in FIG. 5 is formed by supplying a molding material (compound) and performing compression molding. In this case, it is known that the undercut portions 1a, 1b, and 1c are formed using a slide core mechanism that slides inside the mold as the mold is opened and closed. Here, each undercut portion 1a, 1b
, 1c shows a case where the sliding direction of the slide core for forming these is the same direction shown by the C-C arrow, and is different by about 90 degrees from the die cutting direction of the mold shown by the B-B arrow. There is.

【0003】そして、「図6」は、上記樹脂成形品1の
成形時の「図5」におけるD−D線の位置で切断した断
面を示したもので、雌側成形金型2と対偶をなす雄側成
形金型3に、各アンダーカット部1a,1b,1cを形
成するための一体型のスライドコア4が摺動自在に挿着
されており、樹脂成形品1が硬化した後に、スライドコ
ア4が油圧シリンダ5により矢印方向に移動され、且つ
両金型2,3の型開きに支障のない1点鎖線位置に静止
される。
"FIG. 6" shows a cross section taken along line D-D in "FIG. 5" during molding of the resin molded product 1, and shows the female molding die 2 and the pair. An integrated slide core 4 for forming the undercut portions 1a, 1b, 1c is slidably inserted into the male mold 3, and after the resin molded product 1 is cured, the slide The core 4 is moved in the direction of the arrow by the hydraulic cylinder 5 and is stopped at a position shown by a dashed dotted line where opening of both the molds 2 and 3 is not hindered.

【0004】0004

【発明が解決しようとする課題】  然し乍ら、前述の
ような一定範囲内の複数個のアンダーカット部1a,1
b,1cに対し一体型となったスライドコア4を用いて
いるために、このスライドコア4に対する成形時の樹脂
圧が大きいことから大型の油圧シリンダ5を必要とし、
スライド機構部が大型となる。また、スライドコア4の
断面形状は、各アンダーカット部1a,1b,1cを包
含できる円形状にすると極めて大きくなるので、面積を
可及的に小さくするために各アンダーカット部1a,1
b,1cを包含する矩形状とするのが一般的であるが、
この断面矩形状のスライドコア4と雄側成形金型3との
型合わせは、断面円形状のものに比し困難であってクリ
アランスがどうしても大きくなり、バリが発生するだけ
でなく、前述のように繊維充填熱硬化性樹脂の場合には
、雄側成形金型3やスライドコア4が磨耗されて耐久性
が悪くなる。しかも、スライドコア4のアンダーカット
部形成用凹部が成形時のガス溜まりになり易く、そのた
めに、成形後のアンダーカット部1a,1b,1cに欠
損が生じたりする欠点がある。
[Problems to be Solved by the Invention] However, if a plurality of undercut portions 1a, 1 within a certain range as described above
Since an integrated slide core 4 is used for b and 1c, the resin pressure against this slide core 4 during molding is large, so a large hydraulic cylinder 5 is required.
The slide mechanism becomes large. In addition, since the cross-sectional shape of the slide core 4 becomes extremely large if it is made into a circular shape that can include each undercut portion 1a, 1b, 1c, in order to make the area as small as possible, each undercut portion 1a,
It is common to have a rectangular shape that includes b and 1c, but
It is difficult to match the slide core 4, which has a rectangular cross section, with the male molding die 3, compared to one with a circular cross section, and the clearance inevitably increases, which not only causes burrs, but also as mentioned above. In the case of a fiber-filled thermosetting resin, the male molding die 3 and the slide core 4 are worn out, resulting in poor durability. Moreover, the recessed portions for forming the undercut portions of the slide core 4 are likely to become gas pockets during molding, and as a result, there is a drawback that the undercut portions 1a, 1b, and 1c may be damaged after molding.

【0005】そこで本発明は、小型の油圧シリンダによ
るコンパクトなスライド機構部により欠損のないアンダ
ーカット部を形成でき、金型やスライドコア機構の耐久
性を維持できる圧縮成形法とその成形金型装置をを提供
することを技術的課題とするものである。
[0005] Therefore, the present invention provides a compression molding method and a molding mold device thereof, which can form an undercut portion without defects using a compact slide mechanism using a small hydraulic cylinder and maintain the durability of the mold and slide core mechanism. The technical challenge is to provide the following.

【0006】[0006]

【課題を解決するための手段】  本発明は、上記した
課題を達成するための技術的手段として、次のような圧
縮成形法で成形するようにした。即ち、複数個のアンダ
ーカット部を群として有する樹脂成形品の圧縮成形法に
おいて、成形金型に、前記各アンダーカット部を個々に
形成するための各スライドコアピンをそれぞれ組み込み
、この成形金型のキャビティに成形材料を装入した後に
型締めして加圧し、この成形品の硬化後に、同一スライ
ド方向の前記各スライドコアピンを、連結体を介して駆
動源により同時にスライドさせた後に、成形金型より離
型して成形品を取り出す工程を経ることを特徴としてい
る。
[Means for Solving the Problems] In the present invention, as a technical means for achieving the above-mentioned problems, the following compression molding method is used. That is, in a compression molding method for a resin molded product having a plurality of undercut portions as a group, each slide core pin for individually forming each undercut portion is installed in a mold, and the mold is After charging the molding material into the cavity, the mold is clamped and pressurized, and after the molded product has hardened, the slide core pins in the same sliding direction are simultaneously slid by a drive source via a connecting body, and then the molding die is removed. It is characterized by a step of releasing the mold and taking out the molded product.

【0007】また、成形金型装置は、複数個のアンダー
カット部を群として有する樹脂成形品を圧縮成形する成
形金型装置において、雄側成形金型または雌側成形金型
の各アンダーカット部の各々の対応箇所に、それぞれ個
々にスライドコアピンが装設されているとともに、同一
スライド方向の前記各スライドコアピンが連結体で一体
に作動するよう結合され、この連結体が駆動源に連結さ
れたことを特徴として構成さている。
[0007] In addition, in a molding mold device for compression molding a resin molded product having a plurality of undercut portions as a group, each undercut portion of a male side mold or a female side mold. Slide core pins are individually installed at respective corresponding locations, and the slide core pins in the same sliding direction are connected to a connecting body so as to operate as one, and this connecting body is connected to a drive source. It is structured as a feature.

【0008】[0008]

【作用】  成形時の樹脂圧は、従来のように各アンダ
ーカット部を包囲する部分の全面積相当分にならず、個
々のスライドコアピンの面積の合計相当分となって格段
に小さくなる。従って、小型の油圧シリンダ等の駆動源
によるコンパクトなスライド機構で作動させることがで
きる。また、各アンダーカット部に対し個々にスライド
コアピンが対応するので、この各スライドコアピンは、
何れも小さな断面積となるので断面円形の丸型ピンとす
ることかでき、金型に対する型合わせが容易となってク
リアランスを可及的に小さくでき、金型およびスライド
コアピンの耐久性を保持できるとともに、各スライドコ
アピンと金型との各クリアランスがガス抜きとして機能
するので、アンダーカット部の欠損が発生することがな
い。
[Function] The resin pressure during molding is not equivalent to the total area of the portion surrounding each undercut portion as in the conventional case, but is equivalent to the total area of the individual slide core pins, which is much smaller. Therefore, it can be operated with a compact slide mechanism using a drive source such as a small hydraulic cylinder. In addition, each slide core pin corresponds to each undercut, so each slide core pin
Since each has a small cross-sectional area, it can be made into a round pin with a circular cross section, making it easy to match the mold to the mold, making the clearance as small as possible, maintaining the durability of the mold and slide core pin, and Since each clearance between each slide core pin and the mold functions as a gas vent, no damage occurs at the undercut portion.

【0009】[0009]

【実施例】  以下、本発明の好適な一実施例について
図面を参照しながら詳述する。「図1」は成形時の「図
5」におけるD−D線断面図で、「図2」は「図1」の
A−A線断面図をそれぞれ示し、これらの図において「
図5」と同一のものには同一の符号を付してある。雄側
成形金型6には、各アンダーカット部1a,1b,1c
の各々の形成箇所に個々に対応してスライドコアピン7
,8,9がそれぞれ摺動自在に挿着されており、この各
スライドコアピン7,8,9が連結体10により一体に
作動するよう結合され、さらに、連結体10が油圧シリ
ンダ11に連結されている。
[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. "Figure 1" is a cross-sectional view taken along the line D-D in "Figure 5" during molding, and "Figure 2" is a cross-sectional view taken along the line A-A in "Figure 1".
Components that are the same as in FIG. 5 are given the same reference numerals. The male molding die 6 has undercut portions 1a, 1b, 1c.
The slide core pin 7 corresponds to each formation location individually.
. ing.

【0010】この成形金型装置のスライドコア機構では
、成形時の樹脂圧が、各アンダーカット部1a,1b,
1cを包囲する部分、即ち連結体10の投影面積相当分
にならず、個々のスライドコアピン7,8,9の各面積
の合計相当分となって格段に小さくなるので、「図6」
との比較から明らかなように、小型の油圧シリンダによ
るコンパクトなスライド機構を用いて作動させることが
できる。
In the slide core mechanism of this molding die device, the resin pressure during molding is applied to each undercut portion 1a, 1b,
1c, that is, the projected area of the connecting body 10, but the area corresponding to the total area of the individual slide core pins 7, 8, and 9 becomes much smaller.
As is clear from the comparison, it can be operated using a compact slide mechanism using a small hydraulic cylinder.

【0011】また、各スライドコアピン7,8,9は、
個々のアンダーカット部1a,1b,1cに対応する小
さな断面積でよいので、断面円形状になっている。その
ため、雄側成形金型6に対する型合わせが容易となって
クリアランスを極めて小さく設定でき、バリの発生も殆
ど無く、且つ各スライドコアピン7,8,9および雄側
成形金型6の耐久性を保持できるとともに、各々のクリ
アランスから成形時のガスが抜けてガス溜まりが発生し
ないので、成形後のアンダーカット部1a,1b,1c
に欠損が生じることがない。
Furthermore, each slide core pin 7, 8, 9 is
Since a small cross-sectional area corresponding to each undercut portion 1a, 1b, and 1c is sufficient, the cross-section is circular. Therefore, the mold matching with the male side molding die 6 is easy, the clearance can be set extremely small, there is almost no occurrence of burrs, and the durability of each slide core pin 7, 8, 9 and the male side molding die 6 is improved. In addition to being able to hold the undercut parts 1a, 1b, 1c after molding, the gas during molding escapes from each clearance and no gas accumulation occurs.
No defects will occur.

【0012】そして、「図2」の矢印は両金型2,6の
型抜き方向を示しており、各スライドコアピン7,8,
9の各々の径は、同図に1点鎖線で示すように、アンダ
ーカット部1a,1b,1cに接する端面の延長線が雄
側成形金型6に接する点より僅かに後方側に側面が位置
するよう設定されている。それにより、樹脂成形品1が
硬化した後に、油圧シリンダ11の駆動により連結体1
0を介し各スライドコアピン7,8,9を「図3」に示
す位置まで同時に後退させると、両成形金型2,6を容
易に離型して樹脂成形品1を取り出せる。
[0012]The arrows in FIG.
The diameter of each of the holes 9 is such that the side surface is slightly rearward from the point where the extension line of the end surface contacting the undercut portions 1a, 1b, and 1c contacts the male mold 6, as shown by the dashed line in the figure. It is set to be located. Thereby, after the resin molded product 1 has hardened, the connecting body 1 is driven by the hydraulic cylinder 11.
When the slide core pins 7, 8, and 9 are simultaneously retracted to the position shown in FIG.

【0013】「図4」は本発明の他の実施例の断面図を
示し、「図1」乃至「図3」と同等のものには同一の符
号を付してあり、スライド方向の異なるアンダーカット
部1dが群の中に存在する場合の成形金型装置を示して
いる。スライド方向の異なるアンダーカット部1dに対
し、そに対応するスライド方向に摺動自在のスライドコ
アピン12とこれを作動する油圧シリンダ13とを個別
に設けたものであり、前記実施例と同様の効果を得られ
る。
``FIG. 4'' shows a sectional view of another embodiment of the present invention, in which the same reference numerals are given to the same parts as in ``FIG. 1'' to ``FIG. A molding die device is shown in which a cut portion 1d is present in a group. A slide core pin 12 that can freely slide in the corresponding slide direction and a hydraulic cylinder 13 that operates the pin are separately provided for the undercut portions 1d that have different slide directions, and the same effect as in the previous embodiment is achieved. You can get .

【0014】[0014]

【発明の効果】  以上のように本発明の圧縮成形方法
によると、各アンダーカット部を個々に対応するスライ
ドコアピンにより形成するので、この各スライドコアピ
ンと金型との僅かなクリアランスから成形時のガスが抜
けるので、アンダーカット部に欠損が生じることがない
。 また、クリアランスが可及的に小さくなっているので、
バリが殆ど発生せず、スライドコアピンおよび金型の耐
久性を保持できる。
Effects of the Invention As described above, according to the compression molding method of the present invention, each undercut portion is formed by an individually corresponding slide core pin. Since gas escapes, no damage occurs in the undercut portion. Also, since the clearance is as small as possible,
Almost no burrs occur, and the durability of the slide core pin and mold can be maintained.

【0015】また、本発明の成形金型装置によると、成
形時の樹脂圧が、個々のスライドコアピンの合計面積分
のみに限定加圧されるので、小型の油圧シリンダ等の駆
動源を用いることができ、各スライドコアピンのスライ
ド機構をコンパクトに構成することができる。また、各
スライドコアピンを、これらの断面積が小さくなること
から断面円形状にすることができ、金型に対する型合わ
せが容易となってクリアランスを可及的に小さくするこ
とができる。
Furthermore, according to the molding device of the present invention, the resin pressure during molding is applied only to the total area of the individual slide core pins, so a drive source such as a small hydraulic cylinder can be used. This allows the slide mechanism of each slide core pin to be configured compactly. In addition, each slide core pin can be made circular in cross section since the cross-sectional area thereof is reduced, and mold matching with a mold is facilitated, so that the clearance can be made as small as possible.

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

【図1】  本発明の一実施例の圧縮成形状態の切断平
面図である。
FIG. 1 is a cutaway plan view of an embodiment of the present invention in a compression molded state.

【図2】  それのA−A線断面図である。FIG. 2 is a cross-sectional view taken along line AA of the same.

【図3】  それの離型時の切断正面図である。FIG. 3 is a cutaway front view of the product when it is released from the mold.

【図4】  本発明の他の実施例の切断平面図であるか
FIG. 4 is a cutaway plan view of another embodiment of the present invention.

【図5】  本発明により成形される樹脂成形品の斜視
図である。
FIG. 5 is a perspective view of a resin molded product molded according to the present invention.

【図6】  従来の成形金型装置の切断平面図である。FIG. 6 is a cutaway plan view of a conventional molding die device.

【符号の説明】[Explanation of symbols]

1  樹脂成形品 1a〜1d  アンダーカット部 2  雌側成形金型 6  雄側成形金型 7〜9,12  スライドコアピン 10  連結体 1 Resin molded product 1a-1d Undercut part 2 Female side mold 6 Male side mold 7~9,12 Slide core pin 10 Connected body

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】  複数個のアンダーカット部を群として
有する樹脂成形品の圧縮成形法において、成形金型に、
前記各アンダーカット部を個々に形成するための各スラ
イドコアピンをそれぞれ組み込み、この成形金型のキャ
ビティに成形材料を装入した後に型締めして加圧し、こ
の成形品の硬化後に、同一スライド方向の前記各スライ
ドコアピンを、連結体を介して駆動源により同時にスラ
イドさせた後に、成形金型より離型して成形品を取り出
すことを特徴とする圧縮成形法。
Claim 1: In a compression molding method for a resin molded product having a plurality of undercut portions as a group, the molding die includes:
Each slide core pin for individually forming each undercut portion is incorporated, and after charging the molding material into the cavity of this molding die, the mold is clamped and pressurized, and after the molded product is cured, the same sliding direction A compression molding method characterized in that each of the slide core pins is simultaneously slid by a drive source via a connecting body, and then released from a molding die to take out a molded product.
【請求項2】  複数個のアンダーカット部を群として
有する樹脂成形品を圧縮成形する成形金型装置において
、雄側成形金型または雌側成形金型の各アンダーカット
部の各々の対応箇所に、それぞれ個々にスライドコアピ
ンが装設されているとともに、同一スライド方向の前記
各スライドコアピンが連結体で一体に作動するよう結合
され、この連結体が駆動源に連結されてなることを特徴
とする成形金型装置。
2. In a molding device for compression molding a resin molded product having a plurality of undercut portions as a group, a molding die is provided at each corresponding location of each undercut portion of the male molding mold or the female molding mold. , each slide core pin is individually installed, and the slide core pins in the same sliding direction are connected by a connecting body so as to operate as one, and this connecting body is connected to a drive source. Molding mold equipment.
JP3078847A 1991-04-11 1991-04-11 Compression molding method and molding die equipment Expired - Lifetime JP3034326B2 (en)

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JP3078847A JP3034326B2 (en) 1991-04-11 1991-04-11 Compression molding method and molding die equipment

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JP3078847A JP3034326B2 (en) 1991-04-11 1991-04-11 Compression molding method and molding die equipment

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JPH04312818A true JPH04312818A (en) 1992-11-04
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013031789A1 (en) * 2011-08-29 2013-03-07 帝人株式会社 Production method for composite molded body having undercut section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013031789A1 (en) * 2011-08-29 2013-03-07 帝人株式会社 Production method for composite molded body having undercut section

Also Published As

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JP3034326B2 (en) 2000-04-17

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