JP7236182B1 - 射出成型システム及び射出成型方法 - Google Patents
射出成型システム及び射出成型方法 Download PDFInfo
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- JP7236182B1 JP7236182B1 JP2022069424A JP2022069424A JP7236182B1 JP 7236182 B1 JP7236182 B1 JP 7236182B1 JP 2022069424 A JP2022069424 A JP 2022069424A JP 2022069424 A JP2022069424 A JP 2022069424A JP 7236182 B1 JP7236182 B1 JP 7236182B1
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- 238000002156 mixing Methods 0.000 claims abstract description 225
- 238000000465 moulding Methods 0.000 claims abstract description 185
- 239000000203 mixture Substances 0.000 claims abstract description 170
- 239000000463 material Substances 0.000 claims abstract description 101
- 239000004604 Blowing Agent Substances 0.000 claims abstract description 84
- 238000001125 extrusion Methods 0.000 claims abstract description 73
- 238000002844 melting Methods 0.000 claims description 54
- 230000008018 melting Effects 0.000 claims description 54
- 238000005187 foaming Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 51
- 239000000155 melt Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 90
- 238000002347 injection Methods 0.000 description 53
- 239000007924 injection Substances 0.000 description 53
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- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
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- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
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- 150000002835 noble gases Chemical class 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Robotics (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
本出願は、2020年4月23日に出願された「INJECTION MOLDING SYSTEM(射出成型システム)」と題する米国特許出願第16/857092号の一部継続出願である、2022年1月24日に提出された米国特許出願第17/582798号の優先権を主張し、かつ2021年8月23日に出願された米国仮特許出願第63/236044号の優先権を主張する。それら特許の全体は、参照することにより本願に組み込まれる。
10 押出システム
12 射出口
20 吐出チャネル
21 吐出口
30、30a、30b 成型装置
31 金型キャビティ
311 内部上壁
312 内部側壁
313 内部底壁
32 上型
33 下型
34 上モールドベース
341 開口
35 供給ポート
36 圧力調整システム
361 第1気体管路
362 第2気体管路
363 気体源
364 第1弁
365 第2弁
366 感圧ユニット
37 連接点
38 通気ユニット
381 気体管路
382 シャッター
383 弁
39 密封要素
40 支持装置
41 第1要素
411 延伸部
412 アーム部
42 第2要素
50 カバー
51 第1位置
52 第2位置
60 制御システム
61 中央処理装置
62 センサー
70 断熱材
71 開口
72、73 加熱装置
120 溶融ユニット
121 加圧カートリッジ
1211 内部空間
122 第1供給路
123 第1排出路
124 押出部材
125 供給ホッパー
130 混合ユニット
131 混合カートリッジ
132 第2供給路
133 第2排出路
134 混合ローター
1341 柱状体
1342 溝部
140 発泡剤供給ユニット
150 射出ユニット
151 計量カートリッジ
1511 内部空間
152 接続路
153 吐出部材
154 吐出口
161 第1流量制御要素
162 第2流量制御要素
171 第1ポート
172 第2ポート
180 モニタリングモジュール
181 中央処理装置
182 センサー
300 射出成型方法
301~309 工程
H1 高さ
H2 厚み
W1 幅
L 長さ
G 気体
M1、M2 混合物
Claims (10)
- 射出成型システムであって、
押出システムと、吐出チャネルと、成型装置と、支持装置と、を備え、
前記押出システムは、高分子材料と発泡剤の混合物を生成するように構成され、かつ溶融ユニットと、混合ユニットを含み、
前記溶融ユニットは、前記高分子材料を輸送するように構成され、
前記混合ユニットは、前記溶融ユニットから前記高分子材料を受け取り、前記高分子材料を前記発泡剤と混合して当該混合物を形成するように構成され、そのうち、前記混合ユニットは、中空の混合カートリッジと、中空の前記混合カートリッジ内に配置された混合ローターと、を備え、前記混合ローターの長さは中空の前記混合カートリッジの長手方向に沿って延伸され、中空の前記混合カートリッジの内部側壁と前記混合ローター間の最短距離と前記混合ローターの直径の比は、1:1500から1:4500の範囲内であり、
前記吐出チャネルは、前記押出システムと連通可能であり、そのうち、前記吐出チャネルは前記押出システムから離隔して配置され、前記混合物を吐出するように構成されたた吐出口を含み、
前記成型装置は、前記吐出口から前記混合物を受け取るように構成され、かつ金型キャビティと、供給ポートと、を備え、
前記供給ポートは、前記金型キャビティと連通可能であり、前記吐出口に対応して係合可能であり、
前記支持装置は、前記吐出チャネルと前記成型装置の係合を促進するように構成され、前記支持装置が相互に係合するように構成された第1要素と第2要素を含み、そのうち、前記支持装置の前記第1要素が前記押出システムから前記成型装置上に配置された前記第2要素へ突出されることを特徴とする射出成型システム。 - 前記混合物は、前記高分子材料と前記発泡剤の所定比率を有することを特徴とする請求項1に記載の射出成型システム。
- 前記成型装置は
内部上壁と、内部側壁と、前記内部上壁の反対側の内部底壁をさらに含み、
前記内部上壁と、前記内部側壁と、前記内部底壁が前記金型キャビティを定義し、前記供給ポートが前記金型キャビティに連通され、かつ前記内部上壁に配置されることを特徴とする請求項1または2に記載の射出成型システム。 - 前記第1要素は、
前記押出システムに固定された延伸部と、
前記延伸部に結合され、前記第2要素に受け入れられるアーム部と、を含むことを特徴とする請求項1または2に記載の射出成型システム。 - 前記支持装置は、前記成型装置の前記金型キャビティの上方に配置されることを特徴とする請求項1または2に記載の射出成型システム。
- 高分子材料と発泡剤の混合物を生成するように構成され、溶融ユニットと、混合ユニットを含む押出システムと、吐出チャネルと、第1成型装置を提供し、前記吐出チャネルは前記押出システムに連通可能であり、かつ前記押出システムから離隔して配置されて前記混合物を吐出するように構成された吐出口を含み、
前記第1成型装置は、第1金型キャビティと、前記第1金型キャビティに連通可能で、前記吐出口に対応して係合可能な第1供給ポートを含み、そのうち、前記混合ユニットは、中空の混合カートリッジと、中空の前記混合カートリッジ内に配置された混合ローターを含み、前記混合ローターの長さが中空の前記混合カートリッジの長手方向に沿って延伸され、中空の前記混合カートリッジの内部側壁と前記混合ローターの最短距離と、前記混合ローターの直径との比が、1:1500~1:4500の範囲内である工程と、
前記溶融ユニットから前記混合ユニットへ前記高分子材料を輸送する工程と、
前記混合ユニット内へ前記発泡剤を輸送する工程と、
前記混合ユニットの中空の前記混合カートリッジ内で前記高分子材料を前記発泡剤と混合し、前記混合物を形成する工程と、
前記混合ユニットから前記吐出チャネルへ前記混合物を輸送する工程と、
前記吐出口と前記第1供給ポートを係合させる工程と、
前記吐出チャネルを前記第1成型装置に固定する工程と、
第1分量の前記混合物を前記吐出チャネルから吐出する工程と、
前記吐出口と前記第1供給ポートを通じて前記第1分量の前記混合物を前記第1金型キャビティ内に射出する工程と、を含むことを特徴とする射出成型方法。 - 前記高分子材料は、前記溶融ユニットから前記混合ユニットへ第1流量で輸送され、
前記発泡剤は、前記混合ユニットへ第2流量で輸送され、
前記第1流量と前記第2流量の比が一定であることを特徴とする請求項6に記載の射出成型方法。 - 前記第1分量の前記混合物を前記第1金型キャビティ内に射出する前に、前記第1金型キャビティは所定圧力を有することが検出されるまで、当該第1金型キャビティに連結された気体管路を介して気体を第1金型キャビティに注入する工程をさらに含むことを特徴とする請求項6に記載の射出成型方法。
- 前記第1金型キャビティ内で前記第1分量の前記混合物を発泡させ、
前記第1金型キャビティ内の前記第1分量の前記混合物の発泡中に、前記第1金型キャビティから前記気体管路を介して前記気体を1秒未満放出させる工程をさらに含むことを特徴とする請求項8に記載の射出成型方法。 - 前記高分子材料は前記溶融ユニットから前記混合ユニットへ輸送されるとき、前記溶融ユニットと前記混合ユニットの間に配置された流量制御要素を開き、前記溶融ユニットの加圧カートリッジの第1圧力は、中空の前記混合カートリッジの第2圧力に実質的に等しいとき、前記流量制御要素を閉じる工程をさらに含むことを特徴とする請求項6~8のいずれか1項に記載の射出成型方法。
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