JPH02270514A - Plastic molding black lead mold - Google Patents

Plastic molding black lead mold

Info

Publication number
JPH02270514A
JPH02270514A JP1093879A JP9387989A JPH02270514A JP H02270514 A JPH02270514 A JP H02270514A JP 1093879 A JP1093879 A JP 1093879A JP 9387989 A JP9387989 A JP 9387989A JP H02270514 A JPH02270514 A JP H02270514A
Authority
JP
Japan
Prior art keywords
mold
black lead
resin
plastic molding
graphite
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
JP1093879A
Other languages
Japanese (ja)
Other versions
JP2750447B2 (en
Inventor
Takashi Takagi
俊 高木
Seiji Minoura
誠司 箕浦
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.)
Ibiden Co Ltd
Original Assignee
Ibiden 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 Ibiden Co Ltd filed Critical Ibiden Co Ltd
Priority to JP1093879A priority Critical patent/JP2750447B2/en
Publication of JPH02270514A publication Critical patent/JPH02270514A/en
Application granted granted Critical
Publication of JP2750447B2 publication Critical patent/JP2750447B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To perform the reinforcement of a mold structure, and prevent abrasion or failures, and thus obtaining a black lead mold having the strength for a recession and protrusion structure by constituting that a hardening substance of specific thermosetting resin (C O P N A resin) is filled into blow holes of a black lead material. CONSTITUTION:A plastic molding black lead mold comprises a black lead material, and is made such that a hardening substance of C O P N A constituted of a condensation polycyclic aromatic compound comprising a mixture selected from heavy oil of coal or petroleum, tar, pitch, or naphthalene, anthracene, coronene, and derivative having these substances as a main skeleton, a cross linking agent comprising one cyclic, or two cyclic or more aromatic cycle having at least two or more kinds of groups either hydroxymethyl group or halomethyl group, and acid catalyst is filled into blow holes of a porous black lead material. And, the black lead mold is performed the mold structural reinforcement of a porous black lead material, as a result, prevented from occurring defects due to intensively compressive injection of molten resin or abrupt compression and abrasion or failure due to hard materials mixed into the plastic material, whereby uniform products can be manufactured, which have strength for a complex recess and protrusion structure.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、射出成形、押出成形、圧縮成形等の各種プラ
スチック成形に用いられる黒鉛型に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a graphite mold used in various plastic moldings such as injection molding, extrusion molding, and compression molding.

(従来の技術) 近時、多品種少量生産に適し、高精度のプラスチック成
形の技術か求められており、出願人は、従来の金属製の
プラスチック成形用型である所謂金型にかわって、易加
工性で、熱伝導性か良く。
(Prior Art) Recently, there has been a demand for a high-precision plastic molding technology that is suitable for high-mix, low-volume production, and the applicant has developed a technology that can replace the conventional metal mold for plastic molding, so-called metal molds. Easy to process and has good thermal conductivity.

耐熱性及び自己潤滑性に優れた黒鉛材からなるプラスチ
ック成形用黒鉛型を提案している(特開昭63−162
205号)。
We have proposed a graphite mold for plastic molding made of graphite material with excellent heat resistance and self-lubricating properties (Japanese Patent Application Laid-Open No. 163-162
No. 205).

このプラスチ・7り成形用黒鉛型は、上記のようにプラ
スチック成形に適したすぐれた性質を兼ね備えている。
This graphite mold for plastic molding has excellent properties suitable for plastic molding as described above.

しかしなから、黒鉛材自身が多孔質な構造であるため、
射出ノズルより高温、高粘度の溶融樹脂を型のゲートか
らキャビデイ内に加圧注入する射出成形や、雄型と雌型
とを閉じ合わせ圧縮しながら成形する圧縮成形のように
、溶融樹脂の集中的な加圧注入や急激な加圧に対して欠
損を生じやすいという問題があった。
However, because the graphite material itself has a porous structure,
Concentration of molten resin, such as injection molding, in which high-temperature, high-viscosity molten resin is injected under pressure from the injection nozzle into the cavity through the mold gate, and compression molding, in which a male mold and a female mold are closed and molded while being compressed. There was a problem in that it was easy to cause defects due to pressurized injection or rapid pressurization.

また、プラスチック成形では、製品の色彩を豊かにした
り、補強したり、低価格にする等の各種の目的のために
、炭酸カルシウム、木粉、パルプ、IK母1石英粉等の
充填剤がプラスチック材料に配合されるので、これら硬
い材料によって型のゲート部や型内面が摩耗したり、欠
落したりしやすいという問題があった。
In addition, in plastic molding, fillers such as calcium carbonate, wood flour, pulp, and IK base 1 quartz powder are used in plastics for various purposes such as enriching the color of the product, reinforcing it, and lowering the price. Since these hard materials are mixed into materials, there is a problem in that the gate portion and inner surface of the mold are easily worn or chipped due to these hard materials.

一方最近では、成形されてくる製品に対応して型の形状
も複雑化してきており、型内面に多殻の凹凸構造を有す
るものが多く、このような凹凸構造に対して型の強度を
備えることが必要となってきている。
On the other hand, in recent years, the shapes of molds have become more complex in response to the products being molded, and many molds have a multi-shell uneven structure on the inner surface, and the strength of the mold can be improved against such an uneven structure. It has become necessary.

このように、プラスチック成形ては、溶融樹脂の集中的
な加圧注入や急激な加圧に対する欠損防止、あるいはプ
ラスチック材料に混入された硬い材料に対する摩耗や欠
落防止、凹凸構造に対する強度等が型に対して要求され
る。
In this way, when molding plastics, the mold must be able to prevent chipping due to intensive pressurized injection of molten resin or sudden pressurization, prevent abrasion and chipping of hard materials mixed into plastic materials, and provide strength against uneven structures. required.

(発明が解決しようとする課題) 本発明は、このような事情に鑑みなされたものであり、
型構造の補強を図り、プラスチック成形ては、溶融樹脂
の集中的な加圧注入や急激な加圧による欠損や、プラス
チック材料に混入された硬い材料による摩耗や欠落を防
止し、また凹凸構造に対する強度を備えたプラスチック
成形用黒鉛型を提供しようとするものである。
(Problem to be solved by the invention) The present invention has been made in view of the above circumstances,
By reinforcing the mold structure, plastic molding prevents chipping due to intensive pressurized injection of molten resin or sudden pressurization, wear and chipping due to hard materials mixed into the plastic material, and prevents uneven structures. The purpose is to provide a graphite mold for plastic molding that has strength.

(課題を解決するための手段) すなわち1本発明は、 r型の一部又は全部が黒鉛材からなるプラスチック成形
用の黒鉛型であって、下記A)B)C)で構成される熱
硬化性樹脂(COPNA樹脂)の硬化体が黒鉛材の気孔
内に充填されて成ることを特徴とするプラスチック成形
用黒鉛型。
(Means for Solving the Problems) That is, 1 the present invention is a graphite mold for plastic molding in which part or all of the r-type is made of graphite material, and the thermosetting mold is composed of the following A) B) C). 1. A graphite mold for plastic molding, characterized in that the pores of a graphite material are filled with a hardened resin (COPNA resin).

A)石炭系もしくは石油系の重質油、タール。A) Coal-based or petroleum-based heavy oil, tar.

ピッチ、あるいはナフタレン、アントラセン、フェナン
トレン、ピレン、クリセン、ナフタセン、アセナフテン
、アセナフチレン、ベリレン、コロネン、及びこれらを
t骨格とする。11体の中から選ばれる−・種又は二種
以との混合物からなる縮合多環芳香族化合物。
Pitch, naphthalene, anthracene, phenanthrene, pyrene, chrysene, naphthacene, acenaphthene, acenaphthylene, berylene, coronene, and these are used as the t-skeleton. A condensed polycyclic aromatic compound consisting of a species selected from 11 species or a mixture of two or more species.

B)ヒドロキシメチル基、へロメチル槁のし〜ずれか少
なくとも一種の基を二個組と有する一isまたは二環以
上の芳香環からなるIIII#a剤、C)#I触媒、」 を、その要旨としている。
B) a III#a agent consisting of one is or two or more aromatic rings having a pair of at least one of hydroxymethyl group, heromethyl group, C) #I catalyst; This is the summary.

ここで、!橘剤は、?−キシリレンジクロライト、p−
キシリレングリコール(1,4−ベンゼンジメ賃ノール
)、ジメチル−p−キシリレングリコール、ジメチル−
m−キシリレングリコール等である。
here,! What about orange juice? -xylylene dichlorite, p-
Xylylene glycol (1,4-benzenedimethanol), dimethyl-p-xylylene glycol, dimethyl-
m-xylylene glycol and the like.

酸触媒は、塩化アルミニウム、弗化ホウ素等のルイス酸
或いは、硫酸、リン酸、有機スルホン酸、カルボン#1
等のプロトン酸、及びこれらの誘導体の中から選ばれる
一種又は二褐以先の混合物である。
Acid catalysts include Lewis acids such as aluminum chloride and boron fluoride, sulfuric acid, phosphoric acid, organic sulfonic acids, and carboxylic acid #1.
It is one kind or a mixture of two or more protic acids selected from protonic acids such as, and derivatives thereof.

C0PNA樹脂を構成する縮合多環芳香族化合物と、゛
架橋剤と、酸触媒との混合比率は、!I!橘削縮合多環
芳香族化合物雪0.5〜4.0(モル比)のam、縮合
多環芳香族化合物と架橋剤との混合物に対して酸触媒を
0.5〜10wt%の範囲とすることが好ましい。
What is the mixing ratio of the condensed polycyclic aromatic compound that constitutes the C0PNA resin, the crosslinking agent, and the acid catalyst? I! Tachibana shaved condensed polycyclic aromatic compound snow 0.5 to 4.0 (molar ratio) am, acid catalyst in the range of 0.5 to 10 wt% with respect to the mixture of the condensed polycyclic aromatic compound and the crosslinking agent It is preferable to do so.

C0PN^樹脂は、1)80〜300℃の範囲で加熱反
応させた中關反応生成物(Bステージ樹脂)を加S*融
させた溶融液、2)3ステージ樹1l11を溶鋼に溶解
させた連鎖として使用することができ、これら液状のC
0PN^樹−を含浸剤またはコーティング剤として型の
作製に利用することがてきる。
C0PN^ resin is 1) a molten liquid obtained by heating and reacting a medium reaction product (B-stage resin) in the range of 80 to 300°C and melting it by S*, and 2) a 3-stage resin 1l11 dissolved in molten steel. These liquid C can be used as a chain
0PN^-tree can be used as an impregnating agent or coating agent in making molds.

含浸処理は、C0PNA樹脂の溶融液又は溶液内に黒鉛
材を減圧又は常圧下において浸漬する方法及び減圧下に
おいて浸漬した後、加圧して行なう方法がある。
The impregnation treatment can be carried out by immersing the graphite material in a melt or solution of C0PNA resin under reduced pressure or normal pressure, or by immersing it under reduced pressure and then applying pressure.

また、コーティング処理は液状のC0PNA樹脂を刷毛
塗り、ロールコータ−スプレーあるいは浸漬等により黒
鉛材表面に塗布して行なう。
Further, the coating treatment is performed by applying liquid C0PNA resin to the surface of the graphite material by brush coating, roll coater spraying, dipping, or the like.

硬化温度は100〜400℃が好適な範囲である。これ
により多孔質な黒鉛材の気孔をC0PNA樹脂で埋める
ことができる。
The preferred range of curing temperature is 100 to 400°C. This allows the pores of the porous graphite material to be filled with the C0PNA resin.

(作用) このような熱硬化性樹脂であるC0PNA樹脂の硬化体
か黒鉛材の気孔内に充填されて成るプラスチック成形用
黒鉛型は、C0PNA樹脂の硬化する過程において起こ
る架橋結合によって、多孔質な黒鉛材の構造の補強が図
られている。
(Function) A graphite mold for plastic molding, which is made by filling the pores of a graphite material with a cured body of C0PNA resin, which is a thermosetting resin, has a porous structure due to the crosslinking that occurs during the curing process of C0PNA resin. The structure of the graphite material is reinforced.

したがって、溶融樹脂の集中的な触圧注入や急激な加圧
による欠損や、プラスチック材料に混入された硬い材料
による摩耗や欠落が防止される。
Therefore, damage caused by intensive tactile pressure injection of molten resin or rapid pressurization, and wear and damage caused by hard materials mixed into the plastic material are prevented.

また、C0PNA樹脂により補強されたプラスチ・ンク
成形用黒鉛型は1曲げ強度、せん断強度等において黒鉛
材のみからなるものに比べ、高強度となり、複雑な凹凸
構造を有する型に対して十分な強度を備えることができ
る。
In addition, graphite molds for plastink molding reinforced with C0PNA resin have higher bending strength, shear strength, etc. than those made only of graphite material, and have sufficient strength for molds with complex uneven structures. can be provided.

(実施例) 次に実施例について説明する。(Example) Next, an example will be described.

0遺」 市販の粉砕した石油系力・ルサインコークスとコールタ
ールピッチよりなる配合物を加熱混練して得られた混線
物を粉砕後、ラバープレス機で成形して焼成、黒鉛化し
、熱膨張係数(室温〜1000℃)4.5X10−’℃
−1、ショアー硬度52.75λ〜75000人の径の
微細気孔容積か0.08cc/g、かさ密度が1.82
の等方性黒鉛材を得た。この等方性黒鉛材を加工して。
After pulverizing the mixture obtained by heating and kneading a mixture of commercially available pulverized petroleum-based coke and coal tar pitch, the mixture was molded using a rubber press, fired, and graphitized to determine the coefficient of thermal expansion. (Room temperature ~ 1000℃) 4.5X10-'℃
-1, Shore hardness 52.75λ~75000 person diameter micropore volume 0.08cc/g, bulk density 1.82
An isotropic graphite material was obtained. By processing this isotropic graphite material.

射出成形用の型を作製した。A mold for injection molding was made.

含浸剤として石炭系ピッチ(平均分子1i400)とジ
メチル−m−キシリレングリコールをセル比で1=2て
混合し、そこにトリフルオロメタンスルホン酸を5wt
%混合し、120℃で40分°間窒素気流中で反応させ
たC0PNA樹rta<軟化点90℃)を用い1Mに1
50℃で減圧含浸し、200℃で1時間硬化させた後、
250℃で3時間後硬化処理した。
As an impregnating agent, coal-based pitch (average molecular weight: 1i400) and dimethyl-m-xylylene glycol were mixed at a cell ratio of 1=2, and 5 wt of trifluoromethanesulfonic acid was added thereto.
% mixed and reacted at 120°C for 40 minutes in a nitrogen stream.
After vacuum impregnation at 50°C and curing at 200°C for 1 hour,
Post-curing treatment was performed at 250° C. for 3 hours.

得られた射出成形用の型を用いて石英粉の充填剤を含む
プラスチック材料を50時間連続成形した。その結果、
yI!の欠損はみられなかった。又。
Using the obtained injection mold, a plastic material containing a quartz powder filler was continuously molded for 50 hours. the result,
yI! No defects were observed. or.

通常の黒鉛型と比較して本実施例の型の摩耗量は約1/
3であった。
Compared to a normal graphite mold, the amount of wear of the mold of this example is approximately 1/1.
It was 3.

U負遣 実施例1と同じ等方性黒鉛材料を加工して、圧縮成形用
のE型、下型を作製した。
The same isotropic graphite material as in Example 1 was processed to produce an E-type and a lower mold for compression molding.

軟化点80℃の石油系ピッチ(平均分子酸340)とp
−キシレングリコールをモル比l:2の割合で混合し、
5wtXのp−トルエンスルホン酸を加え、130℃、
40分間反応させたC0PNA樹脂を溶剤に溶解させ、
その溶液を上型、下型にスプレーて塗布し、乾燥後、1
80℃で1時間硬化させた後、250℃で2時間後硬化
処理した。
Petroleum pitch with a softening point of 80°C (average molecular acid 340) and p
- mixing xylene glycol in a molar ratio of 1:2;
Add 5wtX p-toluenesulfonic acid and heat at 130°C.
Dissolve the C0PNA resin reacted for 40 minutes in a solvent,
Spray the solution onto the upper mold and lower mold, and after drying,
After curing at 80°C for 1 hour, post-curing treatment was performed at 250°C for 2 hours.

得られた圧縮成形用の型を用いて塩化ビニル樹脂による
成形品を1000個連続成形した。その結果、型の割れ
、欠損等のトラブルは発生しなかった。
Using the obtained compression molding mold, 1000 molded products made of vinyl chloride resin were continuously molded. As a result, no problems such as cracking or chipping of the mold occurred.

なお、プラスチック成形用黒鉛型は、型に成形した黒鉛
材に液状のC0PNA樹脂を含浸またはコーティングし
て硬化させた後、非酸化性雰囲気中で700〜2600
℃に加熱処理することにより、C0PNA樹脂を炭化さ
せたものとして作製することもできる。
In addition, graphite molds for plastic molding are made by impregnating or coating liquid C0PNA resin on the graphite material molded into the mold and curing it, then heating it to a temperature of 700 to 2600 in a non-oxidizing atmosphere.
It can also be produced by carbonizing C0PNA resin by heat-treating it at .degree.

この場合は、炭化されたC0PNA樹脂によって黒鉛材
の表面にガラス状カーボンの膜を形成することかてき、
これにより成形面を離型性の優れたものとすることかて
きるとともに、高熱で行なわれるプラスチックの成形に
対して耐久性に富むプラスチック成形用黒鉛型を得るこ
とができる。
In this case, a glassy carbon film can be formed on the surface of the graphite material using carbonized C0PNA resin.
This makes it possible to provide a molding surface with excellent mold releasability, and to obtain a graphite mold for plastic molding that is highly durable against plastic molding performed at high temperatures.

なお、特に重質油、タール、と・ンチを使用したC0P
NA樹脂は、フェノール、フラン等の熱硬化性樹脂と比
較して遥かに高い炭素化率を有しており、このため加熱
処理過程においては体積収縮か小さく、また速い昇温速
度で加熱処理することかできる。
In addition, in particular, C0P using heavy oil, tar, and
NA resin has a much higher carbonization rate than thermosetting resins such as phenol and furan, and for this reason, the volume shrinkage is small during the heat treatment process, and the heat treatment is performed at a fast temperature increase rate. I can do it.

(発明の効果) 以り説明したように、本発明に係るプラスチック成形用
黒鉛型は、C0PNA樹脂の硬化体によって多孔質な黒
鉛材の型構造の補強が図られているので、溶融樹脂の集
中的な加圧注入や急激な加圧による欠損や、プラスチッ
ク材料に混入された硬い材料による摩耗や欠落を防止し
、複雑な凹凸構造に対する強度を備えることかでき、型
の長寿命化を図ることができるとともに、型の欠損によ
る成形不良かなくなり、均質な製品の生産が期待できる
(Effects of the Invention) As explained above, in the graphite mold for plastic molding according to the present invention, the mold structure of the porous graphite material is reinforced by the hardened C0PNA resin, so that the molten resin is not concentrated. It prevents damage caused by pressurized injection or sudden pressure, as well as wear and tear caused by hard materials mixed into the plastic material, and provides strength against complex uneven structures, extending the life of the mold. At the same time, molding defects due to mold defects are eliminated, and it is expected that uniform products can be produced.

また、型構造の補強は樹脂含浸等により型全体になされ
るので、別体の補強部材を型に取り付ける場合と異なり
、偏りがなく−様な型の強度アップを図ることができる
Furthermore, since the mold structure is reinforced throughout the mold by resin impregnation or the like, the strength of the mold can be increased evenly, unlike the case where a separate reinforcing member is attached to the mold.

さらに、型の作製も非常に簡単に行なうことができる。Furthermore, the mold can be manufactured very easily.

Claims (1)

【特許請求の範囲】 型の一部又は全部が黒鉛材からなるプラスチック成形用
の黒鉛型であって、下記A)B)C)で構成される熱硬
化性樹脂の硬化体が黒鉛材の気孔内に充填されて成るこ
とを特徴とするプラスチック成形用黒鉛型。 A)石炭系もしくは石油系の重質油、タール、ピッチ、
あるいはナフタレン、アントラセン、フェナントレン、
ピレン、クリセン、ナフタセン、アセナフテン、アセナ
フチレン、ベリレン、コロネン、及びこれらを主骨格と
する誘導体の中から選ばれる一種又は二種以上の混合物
からなる縮合多環芳香族化合物、 B)ヒドロキシメチル基、ハロメチル基のいずれか少な
くとも一種の基を二個以上有する一環または二環以上の
芳香環からなる架橋剤、 C)酸触媒。
[Claims] A graphite mold for plastic molding in which part or all of the mold is made of a graphite material, wherein a cured body of a thermosetting resin composed of the following A) B) C) has pores of the graphite material. A graphite mold for plastic molding characterized by being filled with a graphite mold. A) Coal-based or petroleum-based heavy oil, tar, pitch,
Or naphthalene, anthracene, phenanthrene,
A fused polycyclic aromatic compound consisting of one or a mixture of two or more selected from pyrene, chrysene, naphthacene, acenaphthene, acenaphthylene, berylene, coronene, and derivatives having these as main skeletons, B) hydroxymethyl group, halomethyl A crosslinking agent consisting of one or two or more aromatic rings having two or more of at least one of the following groups; C) Acid catalyst.
JP1093879A 1989-04-13 1989-04-13 Graphite mold for plastic molding Expired - Lifetime JP2750447B2 (en)

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JP1093879A JP2750447B2 (en) 1989-04-13 1989-04-13 Graphite mold for plastic molding

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Application Number Priority Date Filing Date Title
JP1093879A JP2750447B2 (en) 1989-04-13 1989-04-13 Graphite mold for plastic molding

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JPH02270514A true JPH02270514A (en) 1990-11-05
JP2750447B2 JP2750447B2 (en) 1998-05-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002254464A (en) * 2001-02-28 2002-09-11 Ibiden Co Ltd Mold for press molding and its production method
JP2007521987A (en) * 2004-01-20 2007-08-09 タッチストーン リサーチ ラボラトリー, リミテッド Carbon foam composite tool and method for using the carbon foam composite tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002254464A (en) * 2001-02-28 2002-09-11 Ibiden Co Ltd Mold for press molding and its production method
JP2007521987A (en) * 2004-01-20 2007-08-09 タッチストーン リサーチ ラボラトリー, リミテッド Carbon foam composite tool and method for using the carbon foam composite tool

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