JPH08300442A - Torpedo screw - Google Patents
Torpedo screwInfo
- Publication number
- JPH08300442A JPH08300442A JP7135985A JP13598595A JPH08300442A JP H08300442 A JPH08300442 A JP H08300442A JP 7135985 A JP7135985 A JP 7135985A JP 13598595 A JP13598595 A JP 13598595A JP H08300442 A JPH08300442 A JP H08300442A
- Authority
- JP
- Japan
- Prior art keywords
- torpedo
- screw
- kneading
- cylinder
- section
- 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
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
- B29C48/505—Screws
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
- B29B7/483—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs the other mixing parts being discs perpendicular to the screw axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
- B29B7/489—Screws
-
- 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
- B29C48/40—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 two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/42—Non-identical or non-mirrored screws
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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱可塑性樹脂や熱硬化
性樹脂またはこれらに無機添加物を混合した樹脂成形材
料を混練するためのスクリュ式混練押出機に用いられる
スクリュに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw used in a screw-type kneading extruder for kneading a thermoplastic resin, a thermosetting resin, or a resin molding material in which an inorganic additive is mixed.
【０００２】[0002]
【従来の技術】従来、この種のスクリュ式混練押出機に
用いられるスクリュは、図３に示すように、スクリュ１
０１の混練部にニーディングディスクやロータ等からな
るミキシングエレメント１０２を設け、該ミキシングエ
レメント１０２が設けられた混練部の前後にはそれぞれ
フルフライト１０３を有する輸送部と計量部とが連続し
て設けられている。2. Description of the Related Art Conventionally, a screw used in this type of screw-type kneading extruder is a screw 1 as shown in FIG.
No. 01 kneading section is provided with a mixing element 102 including a kneading disc, a rotor, etc., and a kneading section provided with the mixing element 102 is provided with a transport section and a measuring section, each having a full flight 103, in front and in back of the kneading section. Has been.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の技術においては、樹脂成形材料が溶融し始めるシリ
ンダ内の混練部におけるシリンダ径方向における樹脂圧
力の変動幅が大きい。その結果、スクリュがシリンダ内
で径方向へ振動してかじりが発生し、スクリュやシリン
ダが摩耗するという問題点があった。However, in the above-mentioned conventional technique, the fluctuation range of the resin pressure in the cylinder radial direction at the kneading portion in the cylinder where the resin molding material begins to melt is large. As a result, there is a problem in that the screw vibrates in the radial direction in the cylinder, galling occurs, and the screw and the cylinder are worn.
【０００４】本発明は、上記従来の技術の有する問題点
に鑑みてなされたものであって、シリンダ径方向におけ
る振動が小さく、かじりが発生しないトーピードスクリ
ュを実現することを目的とするものである。The present invention has been made in view of the above problems of the prior art, and it is an object of the present invention to realize a torpedo screw in which vibration in the cylinder radial direction is small and no galling occurs. .
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明のトーピドスクリュは、フルフライトを有す
る輸送部と、ミキシングエレメントを有する混練部と、
フルフライトを有する計量部とを備えるとともに、前記
輸送部と前記混練部の間にトーピードを介在させたトー
ピードスクリュであって、前記トーピードは、樹脂成形
材料に送りを与えるねじれ角を持たない形状を有するこ
とを特徴とするものである。In order to achieve the above object, the toroid screw of the present invention comprises a transport section having full flight, a kneading section having a mixing element,
With a weighing section having a full flight, a torpedo screw having a torpedo interposed between the transporting section and the kneading section, wherein the torpedo has a shape having no helix angle for feeding the resin molding material. It is characterized by having.
【０００６】また、トーピードの最大外径がスクリュ谷
径の１ないし１．２倍の範囲以内であり、前記トーピー
ドの軸方向の長さが前記最大外径の０．１ないし１．５
倍の範囲以内とすると効果的である。The maximum outer diameter of the torpedo is within a range of 1 to 1.2 times the screw root diameter, and the axial length of the torpedo is 0.1 to 1.5 of the maximum outer diameter.
It is effective to set it within the double range.
【０００７】[0007]
【作用】輸送部のフルフライトにより樹脂成形材料はト
ーピードへ向けて搬送されるが、トーピードは樹脂成形
材料に送りを与えない形状であるため、樹脂成形材料が
滞留してミキシングエレメントを有する混練部において
シリンダ内に完全に充満する。その結果、前記混練部に
おけるシリンダ径方向の部位の圧力の変動幅が小さくな
り、ひいてはトーピードスクリュのシリンダ径方向にお
ける振動が小さくなる。[Function] The resin molding material is conveyed toward the torpedo by the full flight of the transportation section, but since the torpedo has a shape that does not feed the resin molding material, the resin molding material stays and the kneading section having the mixing element The cylinder completely fills at. As a result, the fluctuation range of the pressure in the portion of the kneading portion in the cylinder radial direction becomes small, and thus the vibration of the torpedo screw in the cylinder radial direction becomes small.
【０００８】[0008]
【実施例】本発明の実施例を図面に基づいて説明する。Embodiments of the present invention will be described with reference to the drawings.
【０００９】図１は、本発明のトーピードスクリュの一
実施例を用いたかみ合い型二軸スクリュ式混練押出機を
示し、（ａ）は主要部の模式断面図、（ｂ）は（ａ）の
Ａ−Ａ線に沿う模式断面図、（ｃ）は一方のトーピード
スクリュのトーピードが設けられた部位における径方向
の模式断面図である。FIG. 1 shows a meshing twin-screw kneading extruder using an embodiment of the torpedo screw of the present invention. (A) is a schematic cross-sectional view of the main part, and (b) is (a). The schematic sectional view which follows the AA line, (c) is a radial schematic sectional view in the site | part where the torpedo of one torpedo screw was provided.
【００１０】本実施例のトーピードスクリュ１は、上流
側から順次、フルフライト２ａを有する輸送部、径方向
の断面形状が円形状のトーピード４、ニーディングディ
スクやロータ等からなるミキシングエレメント３を有す
る混練部、フルフライト２ｂを有する計量部とを備えて
いる。The torpedo screw 1 of this embodiment comprises, in order from the upstream side, a transportation part having a full flight 2a, a torpede 4 having a circular cross-section in the radial direction, and a mixing element 3 composed of a kneading disk, a rotor or the like. It is provided with a kneading section and a measuring section having a full flight 2b.
【００１１】シリンダ５は外周面に加熱手段であるヒー
タ５ｂが設けられた複数の分割シリンダ５ａを連結した
ものであって、シリンダ５内には２本のトーピードスク
リュ１が互いにフルフライト２ａ，２ｂがかみ合った状
態で回転自在に配設されており、供給部には供給口６が
設けけれているとともに、計量部の上流部位に設けられ
たベント口７には管路９を介して真空ポンプ８が接続さ
れている。The cylinder 5 is formed by connecting a plurality of divided cylinders 5a each having a heater 5b as a heating means provided on the outer peripheral surface thereof. In the cylinder 5, two torpedo screws 1 are full flights 2a and 2b. Are rotatably arranged in a meshed state, a supply port 6 is provided in the supply part, and a vent port 7 provided in the upstream part of the measuring part is provided with a vacuum pump via a conduit 9. 8 is connected.
【００１２】本発明において、トーピードの径方向の断
面形状は、上記実施例に限らず、図２の（ａ）に示すよ
うな、図示両側面が互いに平行な平面であるとともに図
示上辺および下辺が円弧状のトーピード１４、図２の
（ｂ）に示すような、図示両側面が互いに平行な平面で
あるとともに図示上辺および下辺が山形状のトーピード
２４、図２の（ｃ）に示すような、略長方形であって、
各角部を面取りしたトーピード３４、図２の（ｄ）に示
すような、周面に沿って互いに間隔をおいて突設された
４個の突出部４４ａを有する円形状のトーピード４４
等、樹脂成形材料にスクリュの軸方向への送りを与える
ねじれ角を持たない形状を有するものであれば径方向の
断面形状はどのような形状であってもよい。In the present invention, the cross-sectional shape of the torpedo in the radial direction is not limited to the above-mentioned embodiment, and as shown in FIG. 2A, both side surfaces in the figure are planes parallel to each other and the upper and lower sides in the figure are An arc-shaped torpedo 14, as shown in FIG. 2 (b), with both side surfaces shown in the drawing being planes parallel to each other and having upper and lower sides in the shape of a mountain, as shown in FIG. 2 (c). It is almost rectangular,
A torpedo 34 having chamfered corners, and a circular torpedo 44 having four projecting portions 44a projecting from each other along the peripheral surface at intervals as shown in FIG. 2D.
The cross-sectional shape in the radial direction may be any shape as long as it has a shape having no helix angle for feeding the resin molding material in the axial direction of the screw.
【００１３】上記各実施例のトーピードの最大外径Ｄ
は、それぞれフルフライトが設けられた部位のスクリュ
谷径の１ないし１．２倍の範囲以内にするとともに、各
トーピードの軸方向の長さは、それぞれ前記最大外径Ｄ
の０．１ないし１．５倍の範囲以内にすることが好まし
い。Maximum outer diameter D of the torpedo of each of the above embodiments
Is within a range of 1 to 1.2 times the screw valley diameter of the portion where full flight is provided, and the axial length of each torpedo is the maximum outer diameter D.
It is preferably within the range of 0.1 to 1.5 times.
【００１４】各トーピードの最大外径Ｄを前記スクリュ
谷径の１倍よりも小さくするとトーピードスクリュの機
械的強度が弱くなり、各トーピードの最大外径Ｄを前記
スクリュ谷径の１．２倍より大きくすると、ミキシング
エレメントを有する混練部におけるシリンダの径方向の
部位の樹脂圧力の変動幅が大きくなり、ひいてはトーピ
ードスクリュの径方向における振動が大きくなる。When the maximum outer diameter D of each torpedo is made smaller than 1 time the screw root diameter, the mechanical strength of the torpedo screw becomes weak, and the maximum outer diameter D of each torpedo is set to be 1.2 times the screw root diameter or more. When the value is increased, the fluctuation range of the resin pressure in the radial portion of the cylinder in the kneading section having the mixing element is increased, and the vibration of the torpedo screw in the radial direction is increased.
【００１５】また、トーピードの軸方向の長さが、トー
ピードの最大外径Ｄの０．１倍より小さいとトーピード
スクリュの径方向における振動が大きくなり、トーピー
ドの軸方向の長さが前記最大外径Ｄの１．５倍より大き
いと押出量が変動するので好ましくない。If the axial length of the torpedo is smaller than 0.1 times the maximum outer diameter D of the torpedo, vibration in the radial direction of the torpedo screw will be large, and the axial length of the torpedo will be outside the maximum. If it is larger than 1.5 times the diameter D, the extrusion rate fluctuates, which is not preferable.
【００１６】本発明のトーピードスクリュの効果を確認
するための実験を行なったのでその結果について次に説
明する。An experiment was conducted to confirm the effect of the torpedo screw of the present invention. The result will be described below.
【００１７】（実験例） 使用した押出機；図１に示した実施例と同様のトーピー
ドスクリュを備えたかみ合い型二軸スクリュ式混練押出
機（スクリュフライト外径６５mm，トーピードの軸方向
の長さＬをその最大外径Ｄで除した値、すなわち、Ｌ／
Ｄ＝０．２５） 使用した成形材料；高密度ポリエチレン（メルトインデ
ックス≒０．０５） スクリュ回転数 ；１３７ｒｐｍ 押出量 ；１７２ｋｇ／ｈｒ 運転時間 ；５時間 なお、摩耗程度を明確に把握するために、スクリュはＳ
ＣＭ製であって、フライト山頂部に硬化処理を施さない
ものを用いた。(Experimental Example) Extruder used: An interlocking twin-screw kneading extruder having a torpedo screw similar to that of the embodiment shown in FIG. 1 (screw flight outer diameter 65 mm, torpedo axial length). A value obtained by dividing L by its maximum outer diameter D, that is, L /
D = 0.25) Molding material used: High-density polyethylene (melt index ≈0.05) Screw speed: 137 rpm Extrusion rate: 172 kg / hr Operating time: 5 hours In order to clearly understand the degree of wear, The screw is S
A product made of CM and not subjected to a curing treatment on the flight crest was used.
【００１８】（比較例）トーピードを有しないスクリュ
を備えたかみ合い型二軸スクリュ式混練押出機を使用し
た以外は、上記実験例と同じ条件とした。(Comparative Example) The same conditions as in the above experimental example were used except that an intermeshing twin-screw kneading extruder equipped with a screw having no torpedo was used.
【００１９】[0019]
【表１】 表１において、上部圧力Ｐ1 および下部圧力Ｐ2 は輸送
部と混練部との境界部において計量した樹脂圧力であっ
て、上部圧力Ｐ1 はシリンダ径方向上部の圧力、下部圧
力Ｐ2 はシリンダ径方向下部の圧力である。[Table 1] In Table 1, the upper pressure P 1 and the lower pressure P 2 are the resin pressures measured at the boundary between the transport section and the kneading section, the upper pressure P 1 is the pressure on the upper side in the radial direction of the cylinder, and the lower pressure P 2 is the cylinder. It is the pressure in the lower radial direction.
【００２０】表１から明らかなように、本発明の実験例
は、比較例に比べて上部圧力Ｐ1 および下部圧力Ｐ2 の
圧力変動幅が小さく、フライトの摩耗量が格段に少なく
なっている。As is clear from Table 1, in the experimental example of the present invention, the pressure fluctuation range of the upper pressure P 1 and the lower pressure P 2 is smaller than that of the comparative example, and the wear amount of the flight is remarkably reduced. .
【００２１】[0021]
【発明の効果】本発明は上述のとおり構成されているの
で、次に記載するような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００２２】ミキシングエレメントを有する混練部にお
ける樹脂成形材料のシリンダ径方向の部位における樹脂
圧力の変動幅が小さく、ひいてはトーピードスクリュの
径方向における振動が小さくなる。その結果、トーピー
ドスクリュとシリンダ間にかじりが発生せず、摩耗量が
格段に少なくなる。The fluctuation range of the resin pressure in the region of the resin molding material in the cylinder radial direction in the kneading section having the mixing element is small, and thus the vibration of the torpedo screw in the radial direction is small. As a result, galling does not occur between the torpedo screw and the cylinder, and the amount of wear is significantly reduced.
【図１】本発明のトーピードスクリュの一実施例を用い
たかみ合い型二軸スクリュ式混練押出機を示し、（ａ）
は主要部の模式断面図、（ｂ）は（ａ）のＡ−Ａ線に沿
う模式断面図、（ｃ）は一方のトーピードスクリュのト
ーピードが設けられた部位における径方向の模式断面図
である。FIG. 1 shows a meshing type twin-screw kneading extruder using an embodiment of the torpedo screw of the present invention, FIG.
Is a schematic cross-sectional view of a main part, (b) is a schematic cross-sectional view taken along the line A-A of (a), and (c) is a schematic cross-sectional view in the radial direction of a portion where one torpedo screw is provided with a torpedo. .
【図２】本発明のトーピードスクリュにおけるトーピー
ドの他の実施例を示す径方向の模式断面図である。FIG. 2 is a schematic cross-sectional view in the radial direction showing another embodiment of the torpedo in the torpedo screw of the present invention.
【図３】従来のスクリュの主要部を示す模式部分平面図
である。FIG. 3 is a schematic partial plan view showing a main part of a conventional screw.
１ トーピードスクリュ ２ａ，２ｂ フルフライト ３ ミキシングエレメント ４，１４，２４，３４，４４ トーピード ５ シリンダ ５ａ 分割シリンダ ５ｂ ヒータ ６ 供給口 ７ ベント口 ８ 真空ポンプ ９ 管路 ４４ａ 突出部 1 Torpedo screw 2a, 2b Full flight 3 Mixing element 4, 14, 24, 34, 44 Torpedo 5 Cylinder 5a Divided cylinder 5b Heater 6 Supply port 7 Vent port 8 Vacuum pump 9 Pipeline 44a Projection
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 303:04 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B29K 303: 04
Claims (2)
と、ミキシングエレメント（３）を有する混練部と、フ
ルフライト（２ｂ）を有する計量部とを備えるととも
に、前記輸送部と前記混練部の間にトーピード（４，１
４，２４，３４，４４）を介在させたトーピードスクリ
ュであって、 前記トーピード（４，１４，２４，３４，４４）は、樹
脂成形材料に送りを与えるねじれ角を持たない形状を有
することを特徴とするトーピードスクリュ。1. A transport section having a full flight (2a), a kneading section having a mixing element (3), and a weighing section having a full flight (2b), and between the transport section and the kneading section. Torpedo (4,1
4, 24, 34, 44), wherein the torpedo screw (4, 14, 24, 34, 44) has a shape without a helix angle for feeding the resin molding material. A characteristic torpedo screw.
４）の最大外径がスクリュ谷径の１ないし１．２倍の範
囲以内であり、前記トーピード（４，１４，２４，３
４，４４）の軸方向の長さが前記最大外径の０．１ない
し１．５倍の範囲以内であることを特徴とする請求項１
記載のトーピードスクリュ。2. Torpedo (4, 14, 24, 34, 4
The maximum outer diameter of 4) is within the range of 1 to 1.2 times the screw root diameter, and the torpedo (4, 14, 24, 3)
The axial length of (4, 44) is within the range of 0.1 to 1.5 times the maximum outer diameter.
Torpedo screw described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7135985A JPH08300442A (en) | 1995-05-09 | 1995-05-09 | Torpedo screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7135985A JPH08300442A (en) | 1995-05-09 | 1995-05-09 | Torpedo screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08300442A true JPH08300442A (en) | 1996-11-19 |
Family
ID=15164502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7135985A Pending JPH08300442A (en) | 1995-05-09 | 1995-05-09 | Torpedo screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08300442A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012218158A (en) * | 2011-04-04 | 2012-11-12 | Japan Steel Works Ltd:The | Screw piece structure |
| JP2013001763A (en) * | 2011-06-14 | 2013-01-07 | Hitachi Cable Ltd | Method and device of treating polymeric compound |
| EP3037233B1 (en) * | 2013-08-23 | 2018-09-26 | The Japan Steel Works, Ltd. | Twin screw extruder for manufacturing a fiber-reinforced resin composition, and related process |
-
1995
- 1995-05-09 JP JP7135985A patent/JPH08300442A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012218158A (en) * | 2011-04-04 | 2012-11-12 | Japan Steel Works Ltd:The | Screw piece structure |
| JP2013001763A (en) * | 2011-06-14 | 2013-01-07 | Hitachi Cable Ltd | Method and device of treating polymeric compound |
| EP3037233B1 (en) * | 2013-08-23 | 2018-09-26 | The Japan Steel Works, Ltd. | Twin screw extruder for manufacturing a fiber-reinforced resin composition, and related process |
| US10427325B2 (en) | 2013-08-23 | 2019-10-01 | The Japan Steel Works, Ltd. | Twin screw extruder for use in manufacturing fiber-reinforced resin composition and process for manufacturing fiber-reinforced resin composition |
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