JPH06226816A - Method and apparatus for melting, degassing and extrusion molding - Google Patents

Method and apparatus for melting, degassing and extrusion molding

Info

Publication number
JPH06226816A
JPH06226816A JP5041945A JP4194593A JPH06226816A JP H06226816 A JPH06226816 A JP H06226816A JP 5041945 A JP5041945 A JP 5041945A JP 4194593 A JP4194593 A JP 4194593A JP H06226816 A JPH06226816 A JP H06226816A
Authority
JP
Japan
Prior art keywords
screw extruder
die
screw
melt
degassing
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.)
Pending
Application number
JP5041945A
Other languages
Japanese (ja)
Inventor
Masayuki Aoyama
雅之 青山
Toshiki Maki
淑樹 牧
Takahiro Oshima
貴弘 大嶌
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP5041945A priority Critical patent/JPH06226816A/en
Publication of JPH06226816A publication Critical patent/JPH06226816A/en
Pending legal-status Critical Current

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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To melt and extrusion mold resin which has a fear of hydrolysis at the time of melting without hydrolysis. CONSTITUTION:Upper and lower single-shape extruders 12 and 14 are provided, and the extruder 12 has an upper stage hopper 16 in which resin raw material can be cast and a sheet die 18 provided at its end to output melted resin by increasing its surface area. The die 18 is disposed adjustably at a position with it at an upper part of a bent 30b of a screw 20 of the extruder 14. A bent box 22 has a sealed structure in which a predetermined vacuum state is held. The extruder 14 has a lower stage hopper 26 in which resin raw material can be cast and a metering part 20a of the screw 20 in which an inlet of the part 20b can be sealed by melting the material cast from the hopper 26.

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、溶融脱気押出成形方法
及び装置に関するものである。FIELD OF THE INVENTION The present invention relates to a melt degassing extrusion molding method and apparatus.

【０００２】[0002]

【従来の技術】ポリエチレン・テレフタレート、ポリブ
テン・テレフタレートなどの芳香族ポリエステルは、そ
れぞれ多くの優れた特性を持っているため、繊維、フィ
ルム、シート中空成形ボトルなどの成形品に幅広く使用
されている。しかし、このポリエステルは、溶融成形時
に、わずかな水分、例えば０．０１重量％でも水分が存
在すると、温度、圧力及び滞留時間によっては、加水分
解を起こし、極限粘度が著しく低下し、強度低下、外観
不良などの品質劣化を起こす。このため、溶融成形前に
含有水分率を０．００５重量％以下に前乾燥する必要が
ある。このため、従来の脱気押出成形装置は、図２に示
すように、単軸脱気押出機５０のホッパ５２に乾燥装置
５４が連結されている。乾燥装置５４では、乾燥室５６
においてこれに乾燥空気を流入することによって樹脂原
料を乾燥し、この後、目標値まで乾燥させた樹脂原料を
乾燥室５６からホッパ５２に投入する。2. Description of the Related Art Aromatic polyesters such as polyethylene terephthalate and polybutene terephthalate have many excellent properties and are widely used for molded articles such as fibers, films and sheet hollow molding bottles. However, when a slight amount of water, for example, 0.01% by weight of water is present during melt molding, this polyester undergoes hydrolysis depending on temperature, pressure and residence time, resulting in a marked decrease in intrinsic viscosity and a decrease in strength. It causes quality deterioration such as poor appearance. Therefore, it is necessary to pre-dry the water content to 0.005% by weight or less before melt molding. Therefore, in the conventional degassing extrusion molding device, as shown in FIG. 2, a drying device 54 is connected to the hopper 52 of the single-screw degassing extruder 50. In the drying device 54, the drying chamber 56
In, the resin raw material is dried by flowing dry air into it, and then the resin raw material that has been dried to a target value is introduced from the drying chamber 56 into the hopper 52.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来の脱気押出装置では、乾燥装置が高価であるととも
に、樹脂原料を目標値まで乾燥させるためには膨大なエ
ネルギと時間とが必要であるという問題がある。このた
め、２軸脱気押出装置を用いて、２軸スクリュの特色で
ある、溶融樹脂の表面更新を生かして脱気を十分に行
い、加水分解を防止する方法が実施されている。しか
し、この方法も脱気押出装置が２軸であるため、装置が
高価であるとともに、脱気を十分に行うために押出量を
フィーダで規制する必要があるため、むだなエネルギを
消費しなければならないという問題がある。本発明は、
このような課題を解決するためのものである。However, in the above-mentioned conventional degassing extruder, the drying device is expensive and enormous energy and time are required to dry the resin raw material to the target value. There's a problem. For this reason, a method of preventing hydrolysis by using a twin-screw degassing extruder to sufficiently deaerate by utilizing the surface renewal of the molten resin, which is a feature of the twin-screw screw, is practiced. However, in this method as well, since the degassing / extruding device has two axes, the device is expensive, and the amount of extrusion must be regulated by the feeder in order to perform sufficient degassing, and thus wasteful energy must be consumed. There is a problem that it must be. The present invention is
This is to solve such a problem.

【０００４】[0004]

【課題を解決するための手段】本発明は、２つの単軸押
出機のうち一方を溶融用とし、他方を脱気用とすること
により上記課題を解決する。すなわち、本発明の溶融脱
気押出成形方法は、溶融時に加水分解する可能性のある
樹脂原料を用いる溶融脱気押出成形方法において、上段
単軸押出機によって溶融させた溶融樹脂を、下段単軸押
出機のベント領域に投入して脱気させて押し出すもので
ある。また、上段単軸押出機から押し出される溶融樹脂
の表面積をダイスによって増大させるものとすることも
できる。また、下段単軸押出機のベント領域を真空状態
とするものとすることもできる。また、上記ダイスの高
さ位置又はダイス口の形状を調節することによって脱気
状態を調節するものとすることもできる。また、下段単
軸押出機のホッパから樹脂原料を投入して溶融させ、こ
れによってホッパ側とベント領域との間をシールするも
のとすることもできる。また、本発明の溶融脱気押出成
形装置は、２つの単軸押出機（１２及び１４）から構成
され、上段単軸押出機（１２）は、溶融樹脂の表面積を
増大させて出力可能なダイス（１８）を有しており、ダ
イス（１８）は下段単軸押出機（１４）のベント領域と
連通するベントボックス（２２）にスクリュ（２０）と
の距離を調節可能に配置されており、ベントボックス
（２２）は真空状態に保持可能な密閉構造とされてお
り、下段単軸押出機（１４）は、ホッパ（２６）から投
入された樹脂原料を溶融してベント領域入口をシールす
るように構成される。The present invention solves the above problems by using one of two single-screw extruders for melting and the other for degassing. That is, the melt degassing extrusion molding method of the present invention, in the melt degassing extrusion molding method using a resin raw material that may be hydrolyzed at the time of melting, the molten resin melted by the upper stage single screw extruder, the lower stage single screw It is introduced into the vent area of the extruder, deaerated, and extruded. Further, the surface area of the molten resin extruded from the upper single-screw extruder can be increased by a die. Also, the vent region of the lower single-screw extruder can be made to be in a vacuum state. Further, the degassing state can be adjusted by adjusting the height position of the die or the shape of the die opening. Alternatively, the resin raw material may be charged from the hopper of the lower single-screw extruder and melted, thereby sealing between the hopper side and the vent region. Further, the melt degassing extrusion molding apparatus of the present invention comprises two single-screw extruders (12 and 14), and the upper stage single-screw extruder (12) is a die capable of increasing the surface area of the molten resin and outputting it. (18), the die (18) is arranged in the vent box (22) communicating with the vent region of the lower single-screw extruder (14) so that the distance to the screw (20) can be adjusted, The vent box (22) has a closed structure capable of maintaining a vacuum state, and the lower single-screw extruder (14) melts the resin raw material fed from the hopper (26) to seal the vent region inlet. Is composed of.

【０００５】[0005]

【作用】上段単軸押出機において溶融された溶融樹脂
は、ダイスから下段単軸押出機のベント領域に投下され
る。このとき、溶融樹脂は、表面積を大きくされてダイ
スから出力される。また、このときダイスとスクリュと
の距離は調節されるとともに、ベント領域は所定の真空
度に保持されている。このため、溶融樹脂はダイスから
スクリュに到達するまでの間に加水分解を起こすことは
ない。ベント領域の入口側は、下段単軸押出機のホッパ
に投入された樹脂原料が溶融することによりシールされ
る。これにより、樹脂原料を溶融成形前にあらかじめ乾
燥させなくても、溶融混練中に加水分解を起こすことな
く成形することができる。The molten resin melted in the upper single-screw extruder is dropped from the die into the vent region of the lower single-screw extruder. At this time, the molten resin has a large surface area and is output from the die. At this time, the distance between the die and the screw is adjusted, and the vent region is maintained at a predetermined vacuum level. Therefore, the molten resin does not hydrolyze before it reaches the screw from the die. The inlet side of the vent region is sealed by melting the resin raw material charged into the hopper of the lower single-screw extruder. As a result, the resin raw material can be molded without being hydrolyzed during the melt-kneading even if it is not dried in advance before the melt-molding.

【０００６】[0006]

【実施例】図１に本発明の実施例を示す。溶融脱気押出
成形装置１０は、上下に配置される２つの単軸押出機１
２及び１４を有する。上段単軸押出機１２は、樹脂原料
を投入可能な上段ホッパ１６と、先端に取り付けられた
シートダイス１８（ダイス）とを有している。また、上
段単軸押出機１２のスクリュ先端側にせん断部１２ａを
設け、せん断部１２ａまでの部分は予熱部とし、せん断
部１２ａで極部的に溶融させる構造となっている。シー
トダイス１８は、溶融樹脂の表面積をできる限り大きく
し、溶融樹脂の加水分解を防止する。シートダイス１８
は、下段単軸押出機１４の密閉構造のベントボックス２
２内部に配置される。ベントボックス２２には、吸引に
よって真空度を１０トル以下にするための真空ポンプ２
３を接続する吸引口２４が形成されている。ベントボッ
クス２２は、下段単軸押出機１４のベント領域（スクリ
ュ２０のベント部２０ｂの外周部分）に接続されてい
る。シートダイス１８とスクリュ２０のベント部２０ｂ
との距離は、ベントボックス２２の高さを調節すること
により調節可能である。下段単軸押出機１４には、樹脂
原料を投入可能な下段ホッパ２６（ホッパ）が設けられ
ている。下段単軸押出機１４の下段ホッパ２６とベント
ボックス２２との間には、下段ホッパ２６から投入され
た樹脂原料を溶融させるためのスクリュ２０のメタリン
グ部２０ａが設けられている。メタリング部２０ａによ
って溶融された樹脂により、下段ホッパ２６側とベント
ボックス２２側とがシールされる。EXAMPLE FIG. 1 shows an example of the present invention. The melt degassing extruder 10 comprises two single-screw extruders 1 arranged one above the other.
2 and 14. The upper single-screw extruder 12 has an upper hopper 16 into which a resin raw material can be charged, and a sheet die 18 (die) attached to the tip. In addition, a shearing portion 12a is provided on the screw tip side of the upper single-screw extruder 12, the portion up to the shearing portion 12a is a preheating portion, and the shearing portion 12a has a structure in which the melting is performed locally. The sheet die 18 makes the surface area of the molten resin as large as possible to prevent hydrolysis of the molten resin. Sheet die 18
Is a vent box 2 having a closed structure of the lower single-screw extruder 14.
2 is placed inside. The vent box 22 has a vacuum pump 2 for reducing the vacuum to 10 Torr or less by suction.
A suction port 24 for connecting 3 is formed. The vent box 22 is connected to the vent region of the lower single-screw extruder 14 (the outer peripheral portion of the vent portion 20b of the screw 20). Vent portion 20b of the sheet die 18 and the screw 20
The distance between and can be adjusted by adjusting the height of the vent box 22. The lower single-screw extruder 14 is provided with a lower hopper 26 (hopper) into which a resin raw material can be charged. Between the lower hopper 26 of the lower single-screw extruder 14 and the vent box 22, a metering portion 20 a of the screw 20 for melting the resin raw material charged from the lower hopper 26 is provided. The resin melted by the metering portion 20a seals the lower hopper 26 side and the vent box 22 side.

【０００７】本発明の実施例の動作について説明する。
まず、上段単軸押出機１２の上段ホッパ１６から樹脂原
料が投入される。樹脂原料は、上段単軸押出機１２内で
溶融され、シートダイス１８から下段単軸押出機１４の
ベントボックス２２内に投下される。このとき、シート
ダイス１８によって溶融樹脂の表面積は大きくされる。
また、ベントボックス２２内の真空度は、真空ポンプ２
３によって１０トル以下に保持されている。これと同時
に、下段単軸押出機１４では、少量の樹脂原料が下段ホ
ッパ２６に投入される。この樹脂原料は、スクリュ２０
のメタリング部２０ａによって溶融され、ベント部２０
ｂの入口部を通過させられることによって、ベント領域
の入口部を連続して樹脂シールする。なお、シートダイ
ス１８とベント部２０ｂとの間隔を調節することによ
り、真空中での溶融樹脂の滞留時間を調節することがで
きる。このため、脱気効果を向上させるためにベントボ
ックス２２に供給する溶融樹脂の量を調整する必要がな
い。上記実施例では、上段単軸押出機１２の先端にシー
トダイス１８を取り付けたがこれに限るものではなく、
表面積を増大させることができる装置であれば別の装置
でもよい。The operation of the embodiment of the present invention will be described.
First, the resin raw material is charged from the upper hopper 16 of the upper single-screw extruder 12. The resin raw material is melted in the upper single-screw extruder 12 and dropped from the sheet die 18 into the vent box 22 of the lower single-screw extruder 14. At this time, the surface area of the molten resin is increased by the sheet die 18.
The degree of vacuum inside the vent box 22 is determined by the vacuum pump 2
3 holds less than 10 torr. At the same time, in the lower single-screw extruder 14, a small amount of resin raw material is fed into the lower hopper 26. This resin raw material is screw 20
Is melted by the metalling portion 20a of the
By passing through the inlet of b, the inlet of the vent region is continuously resin-sealed. The residence time of the molten resin in vacuum can be adjusted by adjusting the distance between the sheet die 18 and the vent 20b. Therefore, it is not necessary to adjust the amount of molten resin supplied to the vent box 22 in order to improve the degassing effect. Although the sheet die 18 is attached to the tip of the upper single-screw extruder 12 in the above embodiment, the present invention is not limited to this.
Another device may be used as long as it can increase the surface area.

【０００８】[0008]

【発明の効果】本発明によれば、溶融脱気押出成形装置
は、樹脂原料を上段単軸押出機において溶融し、ダイス
とベント部のスクリュとの距離を調整するとともに、溶
融樹脂の表面積を増大させてダイスから下段単軸押出機
の所定の真空度に保持されているベント領域に投下す
る。これにより、溶融前に樹脂を乾燥させる必要がない
ので、エネルギと時間とを削減することができる。ま
た、溶融脱気押出成形装置は、単軸脱気押出機を２台連
結しただけなので、装置のコストを低減することができ
る。According to the present invention, the melt degassing extrusion molding apparatus melts the resin raw material in the upper single-screw extruder, adjusts the distance between the die and the screw of the vent portion, and adjusts the surface area of the molten resin. It is increased and dropped from the die into the vent region of the lower single-screw extruder which is maintained at a predetermined vacuum degree. This eliminates the need to dry the resin before melting, thus saving energy and time. In addition, the melt degassing / extrusion molding apparatus can reduce the cost of the apparatus because only two single-screw degassing extruders are connected.

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

【図１】本発明の溶融脱気押出成形装置の実施例を示す
図である。FIG. 1 is a diagram showing an embodiment of a melt degassing extrusion molding apparatus of the present invention.

【図２】従来の溶融脱気押出成形装置を示す図である。FIG. 2 is a view showing a conventional melt degassing extrusion molding apparatus.

【符号の説明】[Explanation of symbols]

１０ 溶融脱気押出成形装置 １２ 上段単軸押出機 １４ 下段単軸押出機 １８ シートダイス ２０ スクリュ ２２ ベントボックス ２６ 下段ホッパ（ホッパ） 10 Melt Degassing Extruder 12 Upper Single-screw Extruder 14 Lower Single-screw Extruder 18 Sheet Die 20 Screw 22 Vent Box 26 Lower Hopper (Hopper)

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】溶融時に加水分解する可能性のある樹脂原
料を用いる溶融脱気押出成形方法において、 上段単軸押出機によって溶融させた溶融樹脂を、下段単
軸押出機のベント領域に投入して脱気させて押し出す溶
融脱気押出成形方法。1. In a melt degassing extrusion molding method using a resin raw material which may be hydrolyzed when melted, a molten resin melted by an upper single screw extruder is charged into a vent region of a lower single screw extruder. Melt degassing extrusion molding method. 【請求項２】 上段単軸押出機から押し出される溶融樹
脂の表面積をダイスによって増大させる請求項１記載の
溶融脱気押出成形方法。2. The melt degassing extrusion molding method according to claim 1, wherein the surface area of the molten resin extruded from the upper single-screw extruder is increased by a die. 【請求項３】 下段単軸押出機のベント領域を真空状態
とする請求項１又は２記載の溶融脱気押出成形方法。3. The melt degassing extrusion molding method according to claim 1, wherein the vent region of the lower single-screw extruder is in a vacuum state. 【請求項４】 上記ダイスの高さ位置又はダイス口の形
状を調節することによって脱気状態を調節する請求項２
又は３記載の溶融脱気押出成形方法。4. The degassing state is adjusted by adjusting the height position of the die or the shape of the die opening.
Alternatively, the method of melt degassing extrusion according to 3 above. 【請求項５】 下段単軸押出機のホッパから樹脂原料を
投入して溶融させ、これによってホッパ側とベント領域
との間をシールする請求項１、２、３又は４記載の溶融
脱気押出成形方法。5. The melt deaeration extrusion according to claim 1, 2, 3 or 4, wherein a resin raw material is charged from a hopper of a lower single-screw extruder and melted, thereby sealing between the hopper side and the vent region. Molding method. 【請求項６】 ２つの単軸押出機（１２及び１４）から
構成され、上段単軸押出機（１２）は、溶融樹脂の表面
積を増大させて出力可能なダイス（１８）を有してお
り、ダイス（１８）は下段単軸押出機（１４）のベント
領域と連通するベントボックス（２２）にスクリュ（２
０）との距離を調節可能に配置されており、ベントボッ
クス（２２）は真空状態に保持可能な密閉構造とされて
おり、下段単軸押出機（１４）は、ホッパ（２６）から
投入された樹脂原料を溶融してベント領域入口をシール
するように構成される溶融脱気押出成形装置。6. The upper single-screw extruder (12) is composed of two single-screw extruders (12 and 14), and has a die (18) capable of increasing the surface area of the molten resin and outputting the molten resin. , The die (18) is installed in the vent box (22) communicating with the vent region of the lower single-screw extruder (14) by the screw (2).
The vent box (22) has a closed structure capable of maintaining a vacuum state, and the lower single-screw extruder (14) is loaded from the hopper (26). Melt degassing and extrusion molding device configured to melt the resin material and seal the vent area inlet.
JP5041945A 1993-02-05 1993-02-05 Method and apparatus for melting, degassing and extrusion molding Pending JPH06226816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5041945A JPH06226816A (en) 1993-02-05 1993-02-05 Method and apparatus for melting, degassing and extrusion molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5041945A JPH06226816A (en) 1993-02-05 1993-02-05 Method and apparatus for melting, degassing and extrusion molding

Publications (1)

Publication Number Publication Date
JPH06226816A true JPH06226816A (en) 1994-08-16

Family

ID=12622353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5041945A Pending JPH06226816A (en) 1993-02-05 1993-02-05 Method and apparatus for melting, degassing and extrusion molding

Country Status (1)

Country Link
JP (1) JPH06226816A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1148241A (en) * 1997-08-06 1999-02-23 Sumitomo Heavy Ind Ltd Resin material feeding apparatus for molding machine
US7271853B2 (en) 1999-12-18 2007-09-18 Lg Electronics Inc. Apparatus and method for correcting distortion of image and image displayer using the same
WO2011096396A1 (en) * 2010-02-05 2011-08-11 住友ベークライト株式会社 Degasifier
JP2012025153A (en) * 2010-06-21 2012-02-09 Fp Corp Multi-stage thermoplastic resin extrusion apparatus, and method of extruding thermoplastic resin using the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1148241A (en) * 1997-08-06 1999-02-23 Sumitomo Heavy Ind Ltd Resin material feeding apparatus for molding machine
US7271853B2 (en) 1999-12-18 2007-09-18 Lg Electronics Inc. Apparatus and method for correcting distortion of image and image displayer using the same
WO2011096396A1 (en) * 2010-02-05 2011-08-11 住友ベークライト株式会社 Degasifier
JP2011161318A (en) * 2010-02-05 2011-08-25 Sumitomo Bakelite Co Ltd Deaerator
US8906147B2 (en) 2010-02-05 2014-12-09 Sumitomo Bakelite Company Limited Degassing apparatus
JP2012025153A (en) * 2010-06-21 2012-02-09 Fp Corp Multi-stage thermoplastic resin extrusion apparatus, and method of extruding thermoplastic resin using the same

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