JP2000043036A - Method and apparatus for producing resin material for molding - Google Patents
Method and apparatus for producing resin material for moldingInfo
- Publication number
- JP2000043036A JP2000043036A JP10216651A JP21665198A JP2000043036A JP 2000043036 A JP2000043036 A JP 2000043036A JP 10216651 A JP10216651 A JP 10216651A JP 21665198 A JP21665198 A JP 21665198A JP 2000043036 A JP2000043036 A JP 2000043036A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- water
- extruder
- molding
- material supply
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は成形用樹脂材料の製
造方法および装置に関し、さらに詳しくは、成形用樹脂
材料の酸化劣化による色調変化を低減する成形用樹脂材
料の製造方法および装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a molding resin material, and more particularly to a method and an apparatus for manufacturing a molding resin material for reducing a change in color tone due to oxidative deterioration of the molding resin material.
【０００２】[0002]
【従来の技術】熱可塑性樹脂を射出成形或いは押出成形
することにより所望の成形物を得る場合、その成形に使
用される熱可塑性樹脂材料には、予め成形物に求められ
る特性に応じて他の熱可塑性樹脂および／または添加剤
を添加混合した成形用樹脂材料を得るようにしている。2. Description of the Related Art When a desired molded product is obtained by injection molding or extrusion molding of a thermoplastic resin, the thermoplastic resin material used for the molding includes other materials in advance according to the characteristics required for the molded product. It is intended to obtain a molding resin material in which a thermoplastic resin and / or additives are added and mixed.
【０００３】一般に、上記成形用樹脂材料の製造には単
軸押出機や多軸押出機が使用されており、かつその押出
機に対する熱可塑性樹脂や添加剤などの原料供給口をス
クリュウ軸方向に沿って２箇所以上に設け、これら原料
供給口に順次原料を供給しながら溶融混練する所謂ダウ
ン・ストリーム法が多く採用されている。In general, a single-screw extruder or a multi-screw extruder is used for producing the molding resin material, and a raw material supply port for a thermoplastic resin or an additive to the extruder is arranged in a screw axial direction. In many cases, a so-called down-stream method is used in which the raw material is melted and kneaded while sequentially supplying the raw material to these raw material supply ports at two or more locations.
【０００４】このダウン・ストリーム法による成形用樹
脂材料の製造では、熱可塑性樹脂や添加剤を各原料供給
口から供給する際に、それら原料に空気が随伴して押出
機内に入り込む。これらの空気の一部は原料供給口から
押出機外へ逃げ、また他の一部は押出機内部を移送され
る過程でベント孔から放出されるが、全部は除去されず
に溶融ポリマ中に練り込まれて押し出され、製品の成形
用樹脂材料になる。しかし、このように溶融ポリマ中に
練り込まれた空気は成形用樹脂材料の酸化劣化を招き、
黄色などの色調変化を招くため品質低下の原因になる。In the production of a molding resin material by the down stream method, when a thermoplastic resin or an additive is supplied from each raw material supply port, air accompanies the raw material and enters the extruder. Some of this air escapes from the feed port to the outside of the extruder, and some of the air is released from the vent holes as it is transported inside the extruder. It is kneaded and extruded to become a resin material for molding a product. However, the air kneaded into the molten polymer in this way causes oxidation deterioration of the molding resin material,
It causes a change in color tone such as yellow, which causes quality deterioration.
【０００５】従来、このような酸化劣化の防止対策とし
て、原料の貯槽や供給装置を不活性ガスで置換すること
により、原料中の酸素濃度を予め低減させるようにする
方法がある。しかし、この方法は、原料供給装置と押出
機との接続部においても常時気密性を維持して空気の出
入りを遮断する必要があるため、設備が大掛りになるだ
けでなく、品種切り替えの際には、その都度気密性の解
除をしなければならない面倒がある。したがって、同じ
押出機で頻繁に品種切替えを行わなければならない多品
種少量生産用には著しくコスト高を招くという問題があ
った。Conventionally, as a countermeasure for preventing such oxidative deterioration, there is a method in which the oxygen concentration in the raw material is previously reduced by replacing the storage tank and the supply device of the raw material with an inert gas. However, in this method, it is necessary to maintain airtightness at the connection between the raw material supply device and the extruder at all times to shut off the air inflow and outflow. Has to be released airtight each time. Therefore, there is a problem that the cost is remarkably increased for a multi-product small-lot production which requires frequent product switching with the same extruder.
【０００６】これに対して、特開平６−２８５８４８号
公報は、押出機内を窒素置換する方法が提案されてい
る。この方法は、押出機の第２番目以降の原料供給口近
傍に窒素ガスの供給口を設け、この供給口から窒素ガス
を押出機内に充満させるように供給するもので、押出機
の軸方向長さ１ｍ当たりのシリンダとスクリュウの間隙
で形成される流路容積に対して、標準状態（０℃、１気
圧）で１分間あたり１０倍量以上の窒素ガスを供給する
とされている。On the other hand, Japanese Patent Application Laid-Open No. 6-285848 proposes a method in which the inside of an extruder is replaced with nitrogen. In this method, a nitrogen gas supply port is provided near the second and subsequent material supply ports of the extruder, and the nitrogen gas is supplied from the supply port so as to fill the inside of the extruder. It is stated that nitrogen gas is supplied at a rate of 10 times or more per minute under standard conditions (0 ° C., 1 atm) with respect to the flow path volume formed by the gap between the cylinder and the screw per meter.
【０００７】しかし、このように押出機流路容積の１０
倍以上もの大容量の窒素ガスを押出機に供給すると、押
出機から原料供給口側へ大きな気体の流れが生ずるた
め、比重が小さい原料の場合には、上記気体の流れによ
って原料供給が阻害され、生産性を著しく低下させると
いう問題があった。However, as described above, the extruder flow path volume of 10
When a large amount of nitrogen gas is supplied to the extruder twice or more times, a large gas flow is generated from the extruder to the raw material supply port side. Therefore, in the case of a raw material having a small specific gravity, the supply of the raw material is hindered by the flow of the gas. However, there is a problem that productivity is significantly reduced.
【０００８】[0008]
【発明が解決しようとする課題】本発明の目的は、上述
した従来の問題を解消し、品種切り替え作業や原料供給
操作に実質的に影響を与えることなく成形用樹脂材料の
酸化劣化を防止可能にする成形用樹脂材料の製造方法お
よび装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to prevent the oxidative deterioration of the molding resin material without substantially affecting the kind switching operation and the raw material supply operation. It is an object of the present invention to provide a method and an apparatus for producing a molding resin material.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成する本発
明の成形用樹脂材料の製造方法は、押出機の混練移送方
向に沿って少なくとも２箇所に原料供給部を設け、これ
ら原料供給部から熱可塑性樹脂と他の熱可塑性樹脂およ
び／または添加剤を供給しながら溶融混練する成形用樹
脂材料の製造方法において、前記混練移送方向の第２番
目以降の原料供給部に水滴下ノズルを設け、該水滴下ノ
ズルから水を滴下しながら原料の供給と溶融混練とを行
うことを特徴とするものである。According to the method for producing a molding resin material of the present invention, which achieves the above object, at least two raw material supply sections are provided along the kneading and transferring direction of an extruder, In a method for producing a molding resin material that is melt-kneaded while supplying a thermoplastic resin and another thermoplastic resin and / or an additive, a water drop nozzle is provided in a second or later raw material supply section in the kneading transfer direction, The raw material is supplied and melt-kneaded while water is dropped from the water dropping nozzle.
【００１０】また、本発明の成形用樹脂材料の製造装置
は、押出機の混練移送方向に沿って少なくとも２箇所に
原料供給部を設け、これら原料供給部から熱可塑性樹脂
と他の熱可塑性樹脂および／または添加剤を供給しなが
ら溶融混練する成形用樹脂材料の製造装置において、前
記混練移送方向の第２番目以降の原料供給部に水滴下ノ
ズルを設けたことを特徴とするものである。In the apparatus for producing a molding resin material according to the present invention, a raw material supply section is provided at at least two places along a kneading and transferring direction of an extruder, and a thermoplastic resin and another thermoplastic resin are supplied from these raw material supply sections. And / or a device for producing a molding resin material which melts and kneads while supplying an additive, wherein a water drop nozzle is provided in the second and subsequent raw material supply sections in the kneading / transferring direction.
【００１１】本発明において、水滴下ノズルから原料供
給部に滴下した水は押出機の熱によって水蒸気化するた
め、この水蒸気が熱可塑性樹脂や添加剤に随伴して押出
機内に入り込もうとする空気を遮断する。水は水蒸気化
するとき容積を数十倍もの大きさに拡散し、しかも原材
料の進行方向に垂直な面方向に広がりながら気化するの
で、比較的少量の水を滴下しただけで、高い空気の遮蔽
効果を発揮することができる。In the present invention, since water dropped from the water dropping nozzle to the raw material supply section is turned into steam by the heat of the extruder, this steam is accompanied by the thermoplastic resin and the additive to remove air which is going to enter the extruder. Cut off. When water is turned into steam, it diffuses its volume several tens of times and evaporates while spreading in the plane perpendicular to the direction of travel of the raw materials. The effect can be exhibited.
【００１２】このように極めて簡単な水滴下ノズルを付
設した機構で、水を滴下するだけの単純操作により成形
用樹脂材料の酸化劣化を防止するため、色調変化のない
高品質の成形用樹脂材料を製造することができる。ま
た、単に水を滴下する操作だけであるので、多品種少量
生産における品種切替えにも支障にならず、また原料の
供給にも影響することはない。The mechanism provided with the extremely simple water dropping nozzle prevents oxidation deterioration of the molding resin material by a simple operation of only dropping water, so that a high quality molding resin material having no color change is provided. Can be manufactured. In addition, since the operation is simply the operation of dropping water, it does not hinder the change of types in multi-product small-quantity production, and does not affect the supply of raw materials.
【００１３】[0013]
【発明の実施の形態】本発明において「成形用樹脂材
料」とは、射出成形機や押出成形機などの成形機に原料
として供給する熱可塑性樹脂材料をいい、熱可塑性樹脂
と他の熱可塑性樹脂とを混合した組成物（以下、樹脂ア
ロイ）、熱可塑性樹脂単独または樹脂アロイに添加剤を
混合した組成物などからなり、一般にはペレット状の形
状になっている。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a "resin material for molding" refers to a thermoplastic resin material supplied as a raw material to a molding machine such as an injection molding machine or an extrusion molding machine, and comprises a thermoplastic resin and another thermoplastic resin. It is composed of a composition mixed with a resin (hereinafter, referred to as a resin alloy), a thermoplastic resin alone or a composition obtained by mixing an additive with a resin alloy, and generally has a pellet shape.
【００１４】また「熱可塑性樹脂」とは、溶融押出機に
より溶融可塑化し、押出成形することができる樹脂をい
い、例えばポリアミド、ポリエステル、ポリフェニレン
オキサイド、ポリアセタール、ポリカーボネート、ポリ
プロピレン、ポリエチレン、アクリロニトリル／スチレ
ン共重合体、アクリロニトリル／スチレン／ブタジエン
共重合体などである。The term "thermoplastic resin" refers to a resin that can be melt-plasticized by a melt extruder and extruded. For example, polyamide, polyester, polyphenylene oxide, polyacetal, polycarbonate, polypropylene, polyethylene, and acrylonitrile / styrene. And acrylonitrile / styrene / butadiene copolymer.
【００１５】また「添加剤」とは、補強剤、滑剤、核
剤、可塑剤、難燃剤、加工安定剤、酸化防止剤、紫外線
吸収剤、離型剤、着色剤、帯電防止剤、表面処理剤、架
橋剤、カップリング剤など、熱可塑性樹脂に混合される
ことにより該熱可塑性樹脂を改質する素材をいい、無機
系でも有機系でもよく、また固体でも液体でもよい。こ
の添加剤のうち補強剤の代表的なものとしては、例えば
ガラス繊維、チタン酸カリウム繊維、炭素繊維、金属炭
化物繊維などの繊維状充填剤、ガラスビーズ、ガラスフ
レーク、タルク、マイカ、ワラステナイトなどの無機充
填剤などを挙げることができる。"Additives" include reinforcing agents, lubricants, nucleating agents, plasticizers, flame retardants, processing stabilizers, antioxidants, ultraviolet absorbers, release agents, coloring agents, antistatic agents, surface treatments. A material that modifies the thermoplastic resin by being mixed with the thermoplastic resin, such as an agent, a crosslinking agent, and a coupling agent. The material may be inorganic or organic, and may be solid or liquid. Representative examples of the reinforcing agent among these additives include, for example, glass fibers, potassium titanate fibers, carbon fibers, fibrous fillers such as metal carbide fibers, glass beads, glass flakes, talc, mica, wollastenite and the like. And the like.
【００１６】本発明において「押出機」とは、スクリュ
ウが単軸の単軸押出機や２軸以上の多軸押出機のほか、
ニーダー、バンバリータイプの連続式混練機なども含
み、かつ原料供給部として原料の混練移送方向に沿って
少なくとも２箇所有するものをいう。押出機に設けられ
る少なくとも２箇所の原料供給部のうち、混練移送方向
の最初に設けられる供給部を第１番目の原料供給部とい
い、次いで第２番目、第３番目・・・と呼称する。In the present invention, the term "extruder" means a single-screw extruder having a single screw or a multi-screw extruder having two or more screws.
It includes a kneader, a Banbury type continuous kneader, and the like, and has at least two locations as a raw material supply section along the raw material kneading and transferring direction. Of the at least two raw material supply units provided in the extruder, the first supply unit provided in the kneading and transferring direction is referred to as a first raw material supply unit, and then referred to as a second, third,... .
【００１７】一般に第１番目の原料供給部には、主原料
である母材の熱可塑性樹脂が単独か、或いは熱可塑性樹
脂と補強剤以外の添加剤を供給する。第２番目以降の原
料供給部は、第１番目の原料供給口から供給した原料が
溶融した後に原料が添加されるような位置に設置され、
ここからは他の熱可塑性樹脂や、繊維状充填剤或いは無
機充填剤などの補強剤が供給される。In general, the first raw material supply section is supplied with a thermoplastic resin of a base material, which is a main raw material, alone or with an additive other than the thermoplastic resin and the reinforcing agent. The second and subsequent raw material supply units are installed at positions where the raw material supplied from the first raw material supply port is added after the raw material is melted,
From here, other thermoplastic resins and reinforcing agents such as fibrous fillers or inorganic fillers are supplied.
【００１８】第２番目以降の原料供給部は、１個であっ
ても複数であってもいずれでもよいが、一般的には１乃
至２個設ければよい。第２番目以降の原料供給部は、押
出機の混練移送方向に対して水平横向きに供給するサイ
ドフィーダを設けるのが一般的である。勿論、押出機の
垂直上方から原料を供給する方式であってもよい。本発
明において、供給原料に随伴する空気の遮断用に使用す
る「水」としては、この水が原料と直接接するため、好
ましくはイオン交換水とするのがよく、更に好ましくは
蒸留水がよい。The number of the second and subsequent material supply units may be one or more, but generally one or two may be provided. Generally, the second and subsequent material supply units are provided with side feeders for supplying the material horizontally and horizontally with respect to the kneading and transferring direction of the extruder. Of course, a method in which the raw materials are supplied from above the extruder vertically may be used. In the present invention, the "water" used for shutting off the air accompanying the feedstock is preferably ion-exchanged water, and more preferably distilled water, since this water comes into direct contact with the feedstock.
【００１９】水を滴下する場所は、第２番目以降の原料
供給部に設けた水滴下ノズルであるが、その位置として
は、押出機のシリンダに対する原料供給口と同じにする
か、或いはそれよりも原料流動方向の下流側で、原料の
充満率が１００％に達する領域より上流側にある必要が
ある。例えば、前述のサイドフィーダを原料供給部とし
て設ける場合、サイドフィーダ内部の原材料の充満率は
一般的に１００％未満なので、サイドフィーダの原材料
供給口またはサイドフィーダのシリンダ部分に水滴下ノ
ズルを設けて水を滴下するとよい。The place where the water is dropped is a water drop nozzle provided in the second and subsequent raw material supply sections. The position is the same as that of the raw material supply port for the cylinder of the extruder, or the position of the water supply nozzle is the same. Also, it is necessary to be on the downstream side in the raw material flow direction and on the upstream side of the region where the fullness of the raw material reaches 100%. For example, when the above-mentioned side feeder is provided as a raw material supply unit, since the filling rate of the raw material inside the side feeder is generally less than 100%, a water dripping nozzle is provided at the raw material supply port of the side feeder or the cylinder portion of the side feeder. It is good to drop water.
【００２０】「水」の滴下量としては、押出機の軸方向
の長さ１ｍあたりのシリンダとスクリュウとの間隙で形
成される流路容積０．００１ｍ3 に対し、３グラム／分
以上にすることが望ましい。この水は押出機の熱により
水蒸気と化して拡散するため、熱可塑性樹脂や添加剤に
随伴して押出機中に入り込もうとする空気を遮断するた
め、成形用樹脂材料の酸化劣化を防止する。The amount of water to be dropped is 3 g / min or more for a flow channel volume of 0.001 m 3 formed by a gap between the cylinder and the screw per 1 m in the axial direction of the extruder. It is desirable. This water is converted into water vapor by the heat of the extruder and diffuses, so that the air that enters the extruder along with the thermoplastic resin and additives is shut off, thereby preventing the molding resin material from being oxidized and deteriorated.
【００２１】上記のように１分間あたり３グラムの水が
水蒸気になった場合、その容積は０℃、１気圧のいわゆ
る標準状態で０．００３７ｍ3 の大きさに膨張し、押出
機の流路容積の３．７倍量に匹敵する。したがって、水
の滴下量がこの量よりも少なくても酸化防止効果はある
が、これ以上にすることが望ましい。しかしながら、あ
まり多すぎても酸化防止効果はほぼ飽和状態になり、コ
スト面から無駄になるので、滴下量の上限としては、上
記流路容積０．００１ｍ3 に対し６グラム／分までとす
ることが望ましい。When 3 grams of water is converted to water vapor per minute as described above, the volume of the water expands to 0.0037 m 3 at the so-called standard condition of 0 ° C. and 1 atm. Equivalent to 3.7 times the volume. Therefore, even if the amount of water dropped is smaller than this amount, the effect of preventing oxidation can be obtained, but it is preferable that the amount is more than this. However, if the amount is too large, the antioxidant effect is almost saturated, which is wasteful in terms of cost. Therefore, the upper limit of the amount of dripping is up to 6 g / min for the above-mentioned flow channel volume of 0.001 m 3. Is desirable.
【００２２】 以下、本発明を図に示す実施形態を参照し
て具体的に説明する。図１および図２は、本発明の実施
形態からなる２軸押出機である。シリンダ１は１０個の
ブロックシリンダ１ａが直立に連結されて構成され、外
周に配置したヒータにより加熱されるようになってい
る。シリンダ１の内部には左右一対のスクリュウ２，２
が貫通し、この２本のスクリュウ２，２は軸端に連結し
た駆動モータ３により回転駆動され、熱可塑性樹脂材料
を溶融混練しながら図の右側から左側へ移送し、左端に
装着したノズル（図示せず）からガット状またはシート
状に押し出す。ガットまたはシートは冷却固化後にカッ
ター（図示せず）でペレット化され、成形用樹脂材料に
なる。[0022] Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.
This will be specifically described. 1 and 2 illustrate the implementation of the present invention.
It is a twin screw extruder in the form. Cylinder 1 has 10
The block cylinder 1a is configured to be connected upright,
Heated by a heater arranged around
You. Inside the cylinder 1, a pair of screws 2 and 2
The two screws 2, 2 are connected to the shaft end.
Is driven by the drive motor 3 and is made of a thermoplastic resin material.
Transfer from the right side of the figure to the left side while melting and kneading,
Gut or sheet from attached nozzle (not shown)
Extrude in shape. The gut or sheet is cut after cooling and solidification.
Pelletized in a molding machine (not shown)
Become.
【００２３】上記シリンダ１には、その上流側に第１番
目の原料供給部４が設けられ、中間位置に第２番目の原
料供給部５が設けられ、さらに下流側にベント孔６が設
けられている。第１番目の原料供給部４は、スクリュウ
式定量供給装置４１とホッパ４２から構成され、この第
１番目の原料供給部４からは、成形用樹脂材料の主原料
である熱可塑性樹脂が単独か、或いは熱可塑性樹脂と補
強剤以外の添加剤とが、シリンダ１に開口する原料供給
口４３を介して押出機内へ供給されるようになってい
る。The cylinder 1 is provided with a first raw material supply section 4 at an upstream side, a second raw material supply section 5 at an intermediate position, and a vent hole 6 at a further downstream side. ing. The first raw material supply unit 4 is composed of a screw-type fixed amount supply device 41 and a hopper 42, and the first raw material supply unit 4 is used to determine whether the thermoplastic resin, which is the main raw material of the molding resin material, is used alone. Alternatively, a thermoplastic resin and an additive other than a reinforcing agent are supplied into the extruder through a raw material supply port 43 opened in the cylinder 1.
【００２４】また、第２番目の原料供給部５は、シリン
ダ５２とスクリュウ５３とホッパ５４からなるサイドフ
ィーダ５１を備え、さらにサイドフィーダ５１のホッパ
５４に、スクリュウ式定量供給装置５５を連結して構成
されている。スクリュウ式定量供給装置５５にはホッパ
５６が設けられている。この第２番目の原料供給部５に
は、サイドフィーダ５１のホッパ５４上面に水滴下ノズ
ル７が開口するように設けられ、ホッパ５４内に水が定
量ずつ滴下するようにしてある。The second raw material supply section 5 includes a side feeder 51 composed of a cylinder 52, a screw 53, and a hopper 54, and a hopper 54 of the side feeder 51 is connected to a screw type quantitative supply device 55. It is configured. A hopper 56 is provided in the screw type quantitative supply device 55. In the second raw material supply section 5, a water dropping nozzle 7 is provided so as to open on the upper surface of the hopper 54 of the side feeder 51, and water is dropped into the hopper 54 by a fixed amount.
【００２５】第２番目の原料供給部５からは、他の熱可
塑性樹脂および／または繊維状充填剤或いは無機充填剤
などの補強剤が、シリンダ１に開口する原料供給口５７
を介して押出機内へ供給されるようになっており、これ
ら原料に随伴して空気も押出機内に侵入しようとする。
しかしながら、本件装置では、上記のようにホッパ５４
の上面に設けた水滴下ノズル７から連続的に水が滴下さ
れ、その水が押出機の熱によって蒸気化すると共に、そ
の蒸気が原料供給方向と直交する方向に大きく拡散する
ため、上記のように原料に随伴する空気の進行を遮断
し、押出機内へは入り込まないようにする。したがっ
て、押出機内において熱可塑性樹脂の酸化劣化が阻止さ
れ、高品質の成形用樹脂材料を製造することができる。From the second raw material supply section 5, another thermoplastic resin and / or a reinforcing agent such as a fibrous filler or an inorganic filler is supplied to a raw material supply port 57 opened in the cylinder 1.
Is supplied to the extruder through the air, and air tends to enter the extruder along with these raw materials.
However, in the present device, the hopper 54
Water is continuously dropped from a water drop nozzle 7 provided on the upper surface of the water, the water is vaporized by the heat of the extruder, and the vapor is largely diffused in a direction orthogonal to the raw material supply direction. During the process, the air that accompanies the raw material is blocked so as not to enter the extruder. Therefore, the oxidative deterioration of the thermoplastic resin is prevented in the extruder, and a high-quality molding resin material can be manufactured.
【００２６】[0026]
【実施例】実施例１〜４，比較例１ 図１および図２に示す構成を有し、スクリュウ直径が６
９ｍｍ、スクリュウ長さが２２７５ｍｍの噛合い型同方
向回転２軸押出機を使用し、シリンダ設定温度２８０
℃、スクリュウ回転数３００ｒｐｍで溶融混練し、ベン
ト孔から−０．９３×１０5 Ｐａの減圧度で水やモノマ
などの揮発成分を脱気しながら、第１番目の原料供給部
４から濃硫酸相対粘度２．９５のナイロン６６（東レ
製）を３５０ｋｇ／ｈｒの速さで定量供給し、第２番目
の原料供給部５からチョップドストランドタイプのガラ
ス繊維（日本電気硝子製）を１５０ｋｇ／ｈｒの速さで
定量供給して、押出機先端のダイスから熱可塑性樹脂組
成物をストランド状に押し出すと共に、このストランド
状物を冷却バスで水冷した後ペレタイズし、直径３ｍ
ｍ、長さ３ｍｍの円筒状のペレット（成形用樹脂材料）
を得た。EXAMPLES Examples 1 to 4 and Comparative Example 1 The structure shown in FIGS.
9 mm and a screw length of 2275 mm were used.
, Melted and kneaded at a screw rotation speed of 300 rpm, and concentrated sulfuric acid was supplied from the first raw material supply unit 4 while degassing volatile components such as water and monomers at a reduced pressure of -0.93 x 10 5 Pa from the vent hole. A constant amount of nylon 66 (manufactured by Toray) having a relative viscosity of 2.95 was supplied at a rate of 350 kg / hr, and chopped strand type glass fiber (manufactured by NEC Corporation) was supplied at a rate of 150 kg / hr from the second raw material supply unit 5. The thermoplastic resin composition was extruded in a strand form from the die at the tip of the extruder while the strand-like substance was water-cooled in a cooling bath, and then pelletized to a diameter of 3 m.
m, 3 mm long cylindrical pellet (resin material for molding)
I got
【００２７】上記成形用樹脂材料の製造において、水滴
下ノズル７からイオン交換水を滴下し、その滴下量を、
押出機の軸方向長さ１ｍ当たりのシリンダとスクリュウ
の間隙で形成される流路容積０．００１ｍ3 に対し、そ
れぞれ１分間あたり１．５ｇ、３．０ｇ、４．５ｇ、
６．０ｇ（実施例１〜４）および０ｇ（比較例１）の５
水準に異ならせた。In the production of the molding resin material, ion-exchanged water is dropped from the water dropping nozzle 7, and the amount of the dropped water is
For a flow volume of 0.001 m 3 formed by the gap between the cylinder and the screw per 1 m in the axial length of the extruder, 1.5 g, 3.0 g, 4.5 g,
6.0 g (Examples 1-4) and 5 of 0 g (Comparative Example 1)
Different levels.
【００２８】 得られた５種類のぺレットの色調評価とし
た黄色度を、スガ試験機（株）製カラーコンピュータを
使用して測定した結果を表１に示す。[0028] The color tone evaluation of the obtained 5 types of pellets
The yellowness, using a color computer manufactured by Suga Test Instruments Co., Ltd.
Table 1 shows the results of the measurements.
【００２９】[0029]
【表１】 [Table 1]
【００３０】なお、表１中、「水蒸気量（換算容積）」
は、滴下した水が全量水蒸気になった時、０℃、１気圧
の標準状態においてその水蒸気の占める容積が、押出機
の軸方向の長さ１ｍあたりのシリンダとスクリュウの間
隙で形成される流路容積に対してどの程度になるかを倍
数で示したものである。In Table 1, "amount of water vapor (converted volume)"
When the total volume of the dropped water becomes steam, the volume occupied by the steam under the standard condition of 0 ° C. and 1 atm is the flow formed by the gap between the cylinder and the screw per 1 m in the axial length of the extruder. This is a multiple of the degree to the road volume.
【００３１】 水滴下量が押出機の軸方向の長さ１ｍあた
りのシリンダとスクリュウの間隙で形成される流路容積
０．００１ｍ3 に対して１分間あたり１．５ｇ以上にな
ると、その黄色度は水を滴下しない比較例１に比べて小
さくなった。そして、３．０ｇ以上ではほぼ飽和状態と
なった。従って、水滴下量としては、押出機の軸方向の
長さ１ｍ当たりのシリンダとスクリュウの間隙で形成さ
れる流路容積０．００１ｍ3 に対して１分間あたり３ｇ
以上が望ましいことがわかる。[0031] The amount of water dropped was about 1 m in the axial length of the extruder.
Flow volume formed by the gap between the screw cylinder and screw
0.001mThree1.5g or more per minute
Then, the yellowness was smaller than that of Comparative Example 1 in which water was not dropped.
It has gone down. And when it is 3.0 g or more, it is almost saturated.
became. Therefore, as the amount of water dripping, the axial direction of the extruder
Formed by the gap between the cylinder and screw per meter of length
Flow channel volume 0.001mThree3g per minute
It turns out that the above is desirable.
【００３２】 [0032]
【発明の効果】 上述したように本発明によれば、第２番
目以降の原料供給部に水滴下ノズルを設け、この水滴下
ノズルから滴下させた水を押出機の熱によって水蒸気化
させ、この水蒸気により熱可塑性樹脂や添加剤に随伴し
て押出機内に入り込もうとする空気を遮断するため、成
形用樹脂材料の酸化劣化を防止し、色調変化のない高品
質の成形用樹脂材料を製造することができる。また、本
発明では、単に水を滴下する操作だけであるので、多品
種少量生産における品種切替えにも支障にならず、また
原料の供給にも影響することはない。【The invention's effect】 As described above, according to the present invention, the second
A water drop nozzle is installed in the raw material supply section
Water dropped from the nozzle is turned into steam by the heat of the extruder
This water vapor entrains the thermoplastic resin and additives
To prevent air from entering the extruder.
High quality product that prevents oxidative deterioration of molding resin material and has no color change
A high quality molding resin material can be produced. Also book
In the invention, since it is only an operation of dropping water,
It does not hinder the change of varieties in small-lot production,
It does not affect the supply of raw materials.
【図面の簡単な説明】 [Brief description of the drawings]
【図１】 本発明の実施形態からなる２軸押出機の概略縦
断面図である。 FIG. Outline length of a twin-screw extruder according to an embodiment of the present invention
It is sectional drawing.
【図２】 図１のＡ−Ａ矢視図である。 FIG. 2 FIG. 2 is a view taken along the line AA in FIG. 1.
１ シリンダ ２ スクリュウ ３ 駆動モータ ４ 第１番目の原料供給部 ４１ スクリュウ式定量供給装置 ４２ ホッパ ５ 第２番目の原料供給部 ５１ サイドフィーダ ５２ シリンダ ５３ スクリュウ ５４ ホッパ ５５ スクリュウ式定量供給装置 ５６ ホッパ ７ 水滴下ノズル1 Cylinder 2 Screw 3 Drive motor 4 First raw material supply unit 41 Screw-type quantitative supply device 42 Hopper 5 Second raw material supply unit 51 Side feeder 52 Cylinder 53 Screw 54 Hopper 55 Screw-type quantitative supply device 56 Hopper 7 Water dripping nozzle
Claims (4)
も２箇所に原料供給部を設け、これら原料供給部から熱
可塑性樹脂と他の熱可塑性樹脂および／または添加剤を
供給しながら溶融混練する成形用樹脂材料の製造方法に
おいて、前記混練移送方向の第２番目以降の原料供給部
に水滴下ノズルを設け、該水滴下ノズルから水を滴下し
ながら原料の供給と溶融混練とを行う成形用樹脂材料の
製造方法。1. A raw material supply section is provided at at least two places along a kneading transfer direction of an extruder, and melt-kneading is performed while supplying a thermoplastic resin and another thermoplastic resin and / or an additive from these raw material supply sections. In the method for producing a molding resin material, a water dripping nozzle is provided in the second and subsequent raw material supply units in the kneading and transferring direction, and the raw material is supplied and melt-kneaded while water is dropped from the water dripping nozzle. Manufacturing method of resin material.
ン交換水または蒸留水である請求項１に記載の成形用樹
脂材料の製造方法。2. The method for producing a molding resin material according to claim 1, wherein the water dropped from the water dropping nozzle is ion-exchanged water or distilled water.
ｍ当たりのシリンダとスクリュウとの隙間で形成される
流路容積０．００１ｍ3 に対して３グラム／分以上にす
る請求項１または２に記載の成形用樹脂材料の製造方
法。3. The extruder according to claim 1, wherein said water dripping amount is a length of said extruder.
3. The method for producing a molding resin material according to claim 1, wherein the flow rate is 3 g / min or more with respect to 0.001 m 3 of a flow path volume formed by a gap between the cylinder and the screw per m.
も２箇所に原料供給部を設け、これら原料供給部から熱
可塑性樹脂と他の熱可塑性樹脂および／または添加剤を
供給しながら溶融混練する成形用樹脂材料の製造装置に
おいて、前記混練移送方向の第２番目以降の原料供給部
に水滴下ノズルを設けた成形用樹脂材料の製造装置。4. A raw material supply section is provided at at least two places along a kneading and transferring direction of an extruder, and melt kneading is performed while supplying a thermoplastic resin and another thermoplastic resin and / or an additive from these raw material supply sections. An apparatus for manufacturing a resin material for molding, wherein a water dropping nozzle is provided in a second or later raw material supply section in the kneading and transfer direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21665198A JP4000677B2 (en) | 1998-07-31 | 1998-07-31 | Manufacturing method of resin material for molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21665198A JP4000677B2 (en) | 1998-07-31 | 1998-07-31 | Manufacturing method of resin material for molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000043036A true JP2000043036A (en) | 2000-02-15 |
| JP4000677B2 JP4000677B2 (en) | 2007-10-31 |
Family
ID=16691799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21665198A Expired - Fee Related JP4000677B2 (en) | 1998-07-31 | 1998-07-31 | Manufacturing method of resin material for molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4000677B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009023223A (en) * | 2007-07-19 | 2009-02-05 | Japan Steel Works Ltd:The | Method and apparatus for controlling supply of raw material in extruder |
| KR101144376B1 (en) | 2007-12-20 | 2012-05-10 | 주식회사 엘지화학 | Method of preparing high dielectric composite composition |
| CN103909640A (en) * | 2014-04-22 | 2014-07-09 | 成都彩星科技实业有限公司 | Extruding device for preventing coating block from dropping in rollers |
| CN103934945A (en) * | 2014-04-22 | 2014-07-23 | 成都彩星科技实业有限公司 | Reliable, convenient and rapid-cooling extruding mechanism |
| JP2017177702A (en) * | 2016-03-31 | 2017-10-05 | 株式会社Ｔｂｍ | Method for producing raw material for injection molding, and method for producing resin molding |
| WO2017179584A1 (en) * | 2016-04-15 | 2017-10-19 | 住友化学株式会社 | Method for manufacturing resin composition and biaxial kneading and extruding machine |
-
1998
- 1998-07-31 JP JP21665198A patent/JP4000677B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009023223A (en) * | 2007-07-19 | 2009-02-05 | Japan Steel Works Ltd:The | Method and apparatus for controlling supply of raw material in extruder |
| KR101144376B1 (en) | 2007-12-20 | 2012-05-10 | 주식회사 엘지화학 | Method of preparing high dielectric composite composition |
| CN103909640A (en) * | 2014-04-22 | 2014-07-09 | 成都彩星科技实业有限公司 | Extruding device for preventing coating block from dropping in rollers |
| CN103934945A (en) * | 2014-04-22 | 2014-07-23 | 成都彩星科技实业有限公司 | Reliable, convenient and rapid-cooling extruding mechanism |
| CN103934945B (en) * | 2014-04-22 | 2016-06-29 | 成都彩星科技实业有限公司 | Pressing mechanism that is reliable convenient and that can quickly cool down |
| JP2017177702A (en) * | 2016-03-31 | 2017-10-05 | 株式会社Ｔｂｍ | Method for producing raw material for injection molding, and method for producing resin molding |
| WO2017170112A1 (en) * | 2016-03-31 | 2017-10-05 | 株式会社Ｔｂｍ | Method for manufacturing injection molding feedstock and method for manufacturing resin molding |
| WO2017179584A1 (en) * | 2016-04-15 | 2017-10-19 | 住友化学株式会社 | Method for manufacturing resin composition and biaxial kneading and extruding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4000677B2 (en) | 2007-10-31 |
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