JP5984186B2 - 2軸押出機 - Google Patents
2軸押出機 Download PDFInfo
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- JP5984186B2 JP5984186B2 JP2013044935A JP2013044935A JP5984186B2 JP 5984186 B2 JP5984186 B2 JP 5984186B2 JP 2013044935 A JP2013044935 A JP 2013044935A JP 2013044935 A JP2013044935 A JP 2013044935A JP 5984186 B2 JP5984186 B2 JP 5984186B2
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- screw
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- 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
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/582—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
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- 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
- B29B7/484—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 with two shafts provided with screws, e.g. one screw being shorter than the other
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- 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
-
- 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
- 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
- B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
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- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/35—Extrusion nozzles or dies with rollers
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- 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
- B29C48/402—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 the screws having intermeshing parts
-
- 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
- B29C48/525—Conical screws
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- 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
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
- B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
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- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- 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
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
Description
ところで、この2軸押出機は、ホッパ部の位置では、材料投入口から投入された塊状の材料を噛み込み、圧縮部に供給する機能を、圧縮部の位置では、材料を圧縮し、材料排出口から材料を押し出すために要する圧力を生じさせ、かつ、材料の逆流を抑えて処理量を確保する機能を、それぞれ要求される。
このため、従来の2軸テーパ押出機においては、圧縮部の位置のスクリュー羽根とスクリュー軸の軸心を含む面とがなす角度の大きさを、ホッパ部の位置のスクリュー羽根とスクリュー軸の軸心を含む面とがなす角度の大きさよりも大きく設定するようにされていた(例えば、特許文献1〜2参照。)。
一方、材料に含まれる異物を除去するために、材料排出口にメッシュスクリーンを配設して押し出しを行うストレーニング工程を実施するために1軸押出機が使用されているが、この1軸押出機は、材料投入口の間口が小さく、また、噛み込み性が劣るため、事前に材料を小さく予備加工する必要があり、生産性が低いという問題があった。
この2軸押出機は、従来の2軸テーパ押出機と同様、材料投入口11aを形成したテーパ筒状のホッパ部11と、このホッパ部11に続いて先端に材料排出口12aを形成したテーパ筒状の圧縮部12とを備えたケーシング1内に、テーパ状のスクリュー羽根21を配設した2本のスクリュー軸2を回転可能に設けるようにしている。
そして、本実施例において、圧縮部12のケーシングの内壁面12bとスクリュー羽根21の外縁とのクリアランスD2の大きさを、ホッパ部11のケーシングの内壁面11bとスクリュー羽根21の外縁とのクリアランスD1の大きさよりも小さく設定するようにしている。
これにより、隣接するスクリュー羽根21同士の接触を生じることなく、材料の逆流が生じる要因となる圧縮部12に存在するクリアランスを小さくすることができる。
これにより、ケーシング1全体を機械加工によって製作する場合と比較して、ケーシング1の製作コストを低廉にできる。
ここで、スクリュー羽根21の肉厚t1の大きさは、従来の2軸テーパ押出機と同程度に設定するようにし、肉厚t2の大きさは、肉厚t1の大きさの1.5〜3.0倍程度、好ましくは、1.8〜2.5倍程度に設定するようにする。
これにより、材料排出口12aから材料を押し出すための圧力を一層高めることができる。
そして、これによって、大きな押し出し圧力が必要とされる用途にも使用できる。
この場合、メッシュスクリーン31a、31bは、スライド機構32を介して、使用と清掃とを交互に行うことができるようにしている。
また、図4に示す変形実施例のように、メッシュスクリーン31bに代えて、スペーサ31cを配設することにより、選択的にメッシュスクリーン31aを通さずに材料を通過させるようにすることもできる。
これにより、一連の工程で材料に含まれる異物を除去することができ、材料の品質の向上と工程の短縮化を図ることができる。
11 ホッパ部
11a 材料投入口
11b ホッパ部のケーシングの内壁面
12 圧縮部
12a 材料排出口
12b 圧縮部のケーシングの内壁面
2 スクリュー軸
21 スクリュー羽根
31a メッシュスクリーン
31b メッシュスクリーン
32 スライド機構
4 ローラヘッド
D1 ホッパ部のケーシングの内壁面とスクリュー羽根の外縁とのクリアランス
D2 圧縮部のケーシングの内壁面とスクリュー羽根の外縁とのクリアランス
α1 ホッパ部の位置のスクリュー羽根とスクリュー軸の軸心を含む面とがなす角度
α2 圧縮部の位置のスクリュー羽根とスクリュー軸の軸心を含む面とがなす角度
t1 ホッパ部の位置のスクリュー羽根の肉厚
t2 圧縮部の位置のスクリュー羽根の肉厚
Claims (5)
- 材料投入口を形成したテーパ筒状のホッパ部と、該ホッパ部に続いて先端に材料排出口を形成したテーパ筒状の圧縮部とを備えたケーシング内に、テーパ状のスクリュー羽根を配設した2本のスクリュー軸を回転可能に設けた2軸押出機において、圧縮部のケーシングの内壁面とスクリュー羽根の外縁とのクリアランスの大きさを、ホッパ部のケーシングの内壁面とスクリュー羽根の外縁とのクリアランスの大きさの0.5〜0.8倍に設定してなることを特徴とする2軸押出機。
- ホッパ部のケーシングの内壁と、圧縮部のケーシングの内壁とを別部材で構成してなることを特徴とする請求項1記載の2軸押出機。
- 圧縮部の位置のスクリュー羽根とスクリュー軸の軸心を含む面とがなす角度の大きさを、ホッパ部の位置のスクリュー羽根とスクリュー軸の軸心を含む面とがなす角度の大きさよりも大きく設定するようにしたことを特徴とする請求項1又は2記載の2軸押出機。
- 圧縮部の位置のスクリュー羽根の肉厚の大きさを、ホッパ部の位置のスクリュー羽根の肉厚の大きさよりも大きく設定したことを特徴とする請求項1、2又は3記載の2軸押出機。
- 材料排出口にメッシュスクリーンを着脱可能に配設したことを特徴とする請求項1、2、3又は4記載の2軸押出機。
Priority Applications (1)
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JP2013044935A JP5984186B2 (ja) | 2013-03-07 | 2013-03-07 | 2軸押出機 |
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JP2013044935A JP5984186B2 (ja) | 2013-03-07 | 2013-03-07 | 2軸押出機 |
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JP2014172230A JP2014172230A (ja) | 2014-09-22 |
JP5984186B2 true JP5984186B2 (ja) | 2016-09-06 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3578328A4 (en) * | 2017-01-31 | 2020-09-02 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | SCREW EXTRUDER |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020001176A (ja) * | 2018-06-25 | 2020-01-09 | 株式会社神戸製鋼所 | スクリュ式押出機 |
FR3093456A1 (fr) * | 2019-03-06 | 2020-09-11 | Compagnie Generale Des Etablissements Michelin | Mécanisme de Sortie d’un Mélangeur à Bi-Vis Conique Convergente |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3483300B2 (ja) * | 1994-05-27 | 2004-01-06 | 東レ・ダウコーニング・シリコーン株式会社 | 高粘性物質用押出機のフィルター交換装置 |
JP2004142283A (ja) * | 2002-10-25 | 2004-05-20 | Taiboo:Kk | 押出機用フィルタ交換ユニット及び同ユニットを使用した押出機 |
JP4255873B2 (ja) * | 2004-03-30 | 2009-04-15 | 株式会社神戸製鋼所 | コニカル二軸押出機及び脱水装置 |
JP5027717B2 (ja) * | 2008-04-08 | 2012-09-19 | 株式会社モリヤマ | 2軸押出機 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3578328A4 (en) * | 2017-01-31 | 2020-09-02 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | SCREW EXTRUDER |
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