JP2021509645A - Petの加工システム及び方法 - Google Patents
Petの加工システム及び方法 Download PDFInfo
- Publication number
- JP2021509645A JP2021509645A JP2020550932A JP2020550932A JP2021509645A JP 2021509645 A JP2021509645 A JP 2021509645A JP 2020550932 A JP2020550932 A JP 2020550932A JP 2020550932 A JP2020550932 A JP 2020550932A JP 2021509645 A JP2021509645 A JP 2021509645A
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- pet
- liquid
- screw
- additive
- plastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92476—Fluids, e.g. for temperature control or of environment
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/926—Flow or feed rate
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92714—Degree of crosslinking, solidification, crystallinity or homogeneity
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/29—Feeding the extrusion material to the extruder in liquid form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/26—Scrap or recycled material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Engineering & Computer Science (AREA)
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
●特定の形態のポリマー樹脂、(本発明による)液体添加物、その他のフィラーや漂白剤 などの添加物等を含む、加工用の材料を得るステップ
●次のデータをメインの監視ユニットと制御ユニットのシステムのデータベースに加える
〇 入ってくる材料のロット番号、サプライヤーの参照記号、材料の受け取りのデ ータ(トレーサビリティ用)
●顧客およびサプライヤーのガイドラインと検証されたプロセスとに基づいて、材料に有 効期限の日付を割り当てる。これにより、承認された時間枠(window)外で材料を使用 する生産ラインを自動的に停止する。
●使用した樹脂について行った試験結果を追加する。
●その樹脂を水分試験の対象とし(2)、樹脂バッチの水分を百万分率(PPM)で算出 する。このデータはデータベースに加えられる。加えられたデータによると、その後、 監視ユニットと制御ユニットの処理ユニットが、材料を乾燥途中にしたり、または、乾 燥させ過ぎたりしないようにするため、樹脂にとって適切な乾燥条件を算出する。この 両方の状態は、加工に入る樹脂が規格に合わなくなる原因となるであろう。
●ポリマー樹脂を乾燥機に加え(3)、前のステップから処理ユニットの算出により特定 された正しい温度と時間で乾燥させる。乾燥器と供給システムが十分にモダンな設計で あれば、監視ユニットと制御ユニットとが乾燥機を制御して、温度と時間をあらかじめ 調整し、オペレーターのエラーを減らすことができる。
●材料をプラスチック加工機のホッパーに搬送する(4)。オンラインセンサーが、加工 機に入る実際の水分ppmを測定する。この情報は、監視ユニットと制御ユニットに伝 えられ、2つの即時フィードバックを生じさせる。すなわち、
〇 監視ユニットと制御ユニットが、実際の水分ppmと予想されるppmとを比 較し、著しい逸脱がある場合に(これは例えば乾燥機の故障によるものであるため )オペレーターに警告する。
〇 システムの検証中に加えられたデータに基づいて、水分の割合(%)を利用し 、樹脂の予想される粘度を特定するのに役立てる。
●トレーサビリティ用のラインを管理するオペレーターのIDを記録する。
●加工中の環境変化を考慮に入れるため、ローカルセンサーにより領域内の温度や湿度な どの周囲条件を記録する。
●次のステップによってポリマーを加工(5)する。
〇 ポリマー樹脂がスクリューによって運ばれることにより、加工機のバレル を通って移動するとき、ポリマー樹脂は溶け始める。ポリマー樹脂は、ダイに 力(圧力)を加え、加工機を通過するためにモーターに負荷をかける。これら の測定値の両方は、材料の粘度の関数である。これらの測定値の読み取りは、 監視ユニットと制御ユニットによって毎秒行われる。両方の測定値は、材料の 性能(すなわち分子量)を表している。
〇 クライアント固有の添加物(これらは例えば着色添加剤、安定剤等)が計 量されて押出器内に加えられる。これらは液状またはペレット状で、一定の割 合でバレルに加えられる。それらの添加速度および実際のそれらのフィーダー の性能はデータベースに加えられる。フィーダー性能の変動は、エラーを生み 出すアルゴリズム計算の原因となり得るので、付随物Iのリアルタイム性能が 考慮に入れられる。
〇 本発明による添加物の添加速度は、リアルタイム情報、具体的には、水分 (ホッパーのセンサーに由来)、モーターの負荷、ダイ圧(メイン加工機に由 来)、環境条件、乾燥時間(ローカルセンサーと乾燥機に由来)およびフィー ダー性能/材料タイプ(任意の追加的な付随物に由来)を利用するプロプライ エタリ・ソフトウェアを使用して算出される。これによりソフトウェアが秒単 位で、加工樹脂が管理される必要があるかどうかを「選択」でき、管理が必要 な場合、樹脂の分子量/粘度/分子鎖切断修復を増やすか、または、分子量/ 粘度/流動促進を減らすかを「選択」できる。その後、このソフトウェアは運 搬装置を制御し、適切な加工添加物の正確な量を計量して、リアルタイムに直 接的にバレルに入れる。本発明による一種類の液体添加剤は、PET鎖延長剤 と、従来、マスターバッチの形で添加される市販の材料との特有のブレンドで ある。それらをリアルタイムで添加し、監視ユニットと制御ユニットとが添加 速度を絶え間なく制御できるようにすることで、プロセスによって必要なとき に、PETの分岐とPETの鎖長とを増やすことができる。本発明による別の 種類の液体添加物は、PETの流動促進剤と、従来、マスターバッチの形で添 加される市販の材料との特有の混合物である。それらをリアルタイムで添加し 、監視ユニットと制御ユニットとが添加速度を絶え間なく制御できるようにす ることで、プロセスによって必要なときにのみ、PETの流動性を増大させる ことが可能となる。この添加物は、リアルタイムでPETと反応し、加工機を 出る。監視ユニットと制御ユニットはプロセスを監視し続け、必要に応じてリ アルタイムでパラメータと供給速度を変化させ、加工の安定性を保持しかつ改 善する。
●製造された材料のロット番号を、トレーサビリティのためにデータベースに加える(6 )。監視ユニットと制御ユニットの計算およびデータベースは、管理チームによるリモ ート視聴のために絶えずクラウドにアップロードされる。予想される基準から逸脱する ことが観察された任意の相互作用は、アルゴリズムに組み込まれて逸脱が再発しないよ うにする(リアルタイムの機械学習)。
Claims (10)
- PET原材料またはリサイクルされたPET材料を加工するシステムであって、溶融された熱可塑性樹脂用の可塑化シリンダーを備える従来型のプラスチック加工機と、添加物の管理システムとを備え、そのシステムはリアクティブかつ適応的であり、プログラム可能な論理制御装置(PLC)と、複数のセンサーのシステムとを備える動的PIDシステムを備えることを特徴とし、複数のセンサーのシステムが、プラスチック加工機の材料ホッパー、スクリューおよび分配スロートにセンサーを備えるシステム。
- 請求項1に記載のシステムであって、添加物の管理システムは、液体プラスチック添加物のオンライン管理のシステムであり、カルーセルから様々な組成の液体添加物を混合する手段と、それらをメーター方式で、ポリマー溶融加工装置のバレルに運搬する手段と、液体添加物を高温で加圧することのできる液体ポンプと、液体添加物を溶融加工装置に導入する前に混合する手段と、溶融加工装置からの圧力および温度の信号を、液体添加物の添加速度に変換する手段とを備えることを特徴とするシステム。
- PET原材料またはリサイクルされたPET材料を加工する方法であって、従来型のプラスチック加工機において、プラスチックを乾燥および加工するステップを備え、プラスチック加工機が、溶融された熱可塑性樹脂用の可塑化シリンダーと、添加物の管理とを備え、液状PET鎖延長剤の混合物を使用して、PETの分岐および鎖長が、液状PET内で制御されることを特徴とする方法。
- 請求項3に記載の方法であって、液体プラスチック添加物が、プラスチック加工機の材料ホッパー、スクリューおよび分配スロートのセンサーと、周囲条件センサーとのリアルタイムの測定値に基づいてリアルタイムに添加され、液状PETに注入され、液体プラスチック添加物がPET均質化添加物であり、ホッパーのセンサーが、加工機に入る実際のppm水分を測定し、スクリューのセンサーが、液状PETの粘度とモーター負荷とを測定し、分配スロートのセンサーが、圧力を測定することを特徴とする方法。
- 請求項4に記載の方法であって、センサーが、実際の水分ppmと予想されるppmとを比較し、かつ、液状PETの予想される粘度を特定する監視制御ユニットに、情報を伝えることを特徴とする方法。
- 請求項4または5に記載の方法であって、周囲条件が、プラスチック加工機の周囲の温度と湿度であることを特徴とする方法。
- 請求項3〜6のいずれかに記載の方法であって、液状PETが秒単位で管理されることを特徴とする方法。
- 請求項7に記載の方法であって、液状PETの管理に、分子量および粘度を増加させたり減少させたりすること、修復または鎖切断、流動促進を高めることが含まれることを特徴とする方法。
- 請求項3〜8のいずれかに記載の方法であって、可塑化シリンダー内の溶融樹脂の充填量が測定され、溶融樹脂の充填量の測定が完了する時点におけるスクリューの位置からスクリューを回転させずに、所定の距離だけスクリューを戻すとともに、溶融樹脂への液体添加物が可塑化シリンダー内に導入され、溶融樹脂の圧力が検出され、スクリューの射出開始位置と、液体添加物の添加速度とがその圧力に基づいて決定されることを特徴とする方法。
- 請求項9に記載の方法であって、スクリューの射出開始位置を決定するステップには、スクリューを前進させることにより溶融樹脂を加圧する手順が含まれ、スクリューの射出開始位置を決定するステップにはさらに、溶融樹脂を加圧した後に溶融樹脂を圧抜きする手順が含まれ、スクリューの射出開始位置が、測定の完了時のスクリューの位置と異なり、液体添加物が可塑化シリンダー内の溶融樹脂のフローフロント部分に導入されることを特徴とする方法。
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LT2017540A (lt) | 2019-06-10 |
EP3720682A1 (en) | 2020-10-14 |
IL275167A (en) | 2020-07-30 |
ZA202003591B (en) | 2021-08-25 |
WO2019111061A1 (en) | 2019-06-13 |
KR20200093646A (ko) | 2020-08-05 |
JP2022062162A (ja) | 2022-04-19 |
EP3720682B1 (en) | 2024-05-29 |
AU2018379815A1 (en) | 2020-07-02 |
LT6658B (lt) | 2019-09-25 |
AU2022204352A1 (en) | 2022-07-07 |
US20200353661A1 (en) | 2020-11-12 |
KR102534441B1 (ko) | 2023-05-19 |
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