JP2018519192A - 二輪車用の合成樹脂フレームの製造方法 - Google Patents
二輪車用の合成樹脂フレームの製造方法 Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- Engineering & Computer Science (AREA)
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Abstract
【選択図】図1
Description
1.射出成形型を閉じる
2.閉鎖力を構築する
3.熱可塑性の合成樹脂溶融物を射出する
4.任意で、約2秒にわたる僅かな圧力後の時間
5.型に少なくとも1つの射出装置を開いて流体射出を開始する
6.流体によって部品キャビティから合成樹脂コアを置き換える
7.短時間にわたって部品内部の流体圧力を維持する(圧力後としての効果)
8.任意で、同じ流体または異なる流体によって部品内部をフラッシュしてより良い冷却効果を実現する
9.流体を流し去る(または、真空によって吸い出す)
10.型を開く
11.部品を取り出す
このステップシーケンスに関して留意する必要があることとして、ステップ9は、必ずしも実行されない。射出される流体として気体が使用される場合、それは部品内に残ったままであってもよい。使用される流体は、水または気体を含んでいてもよい。しかしながら、両方の媒体が含まれていてもよい。なぜなら、例えば、気泡が水によって押し流され、まず窒素が中空スペースを形成するために使用され、続けて二酸化炭素が部品の冷却のために使用されるためである。
Claims (15)
- 少なくとも1つの中空スペースを内部に有する二輪車のための合成樹脂フレームを合成樹脂の射出成形によって製造する方法であって、
熱可塑性の合成樹脂の溶融物を閉じた射出成形型内に射出するステップと、
少なくとも1つの流体を射出して部品キャビティから合成樹脂コアを置き換えるステップと、
少なくともしばらくの間、部品内部の流体圧力を維持するステップとを含む
ことを特徴とする方法。 - 請求項1において、
上記部品内部の流体圧力をしばらく維持した後に、上記流体を流し去り、および/または吸い出す
ことを特徴とする方法。 - 請求項1または2において、
上記流体は、上記合成樹脂コアを、上記射出成形型に設けられた二次キャビティ内に押し出す
ことを特徴とする方法。 - 請求項1または2において、
上記流体は、上記合成樹脂コアを、質量バックプレス工程により、ランナー、例えばホットランナー、部分的ホットランナー、またはコールドランナーを通じて、射出成形装置のスクリュー前室内へ押し出す
ことを特徴とする方法。 - 請求項1または2において、
上記射出成形型の少なくとも1つの成形キャビティの一部のみを、上記熱可塑性の合成樹脂の溶融物で満たし、
上記合成樹脂コアを上記流体の射出によって置き換えて上記熱可塑性の合成樹脂の溶融物を膨張させ、それにより上記溶融物を上記射出成形型の壁部に接触させつつ中空スペースを形成し、かつ上記成形キャビティを完全に満たす
ことを特徴とする方法。 - 請求項1〜5のいずれか1項において、
対応して形成されたコアを、射出成形プロセスにおいて、上記合成樹脂フレームに組み込まれる部品、例えばステアリングヘッドベアリング、および/またはボトムブラケットベアリング、および/またはモータ、および/または蓄電池の領域に挿入し、それにより該領域を部品の取出しの後に中空とし、ここで上記コアは、配置され、または流体圧的、空気圧的、もしくは電気的に移動可能である
ことを特徴とする方法。 - 請求項1〜5のいずれか1項において、
上記合成樹脂フレームに組み込まれる部品、例えばステアリングヘッドベアリング、および/またはボトムブラケットベアリング、飲料ボトルに適合するねじ付きスクリュー、反射板、ブレーキライン、電流および/または電気信号を伝達するためのケーブル、位置測定システム(例えば、GPS位置測定システム)、蓄電池、および/またはモータを、個別にまたはグループで上記射出成形型内に挿入し、装置によって上記射出成形型内に保持し、そして合成樹脂でオーバーモールドする
ことを特徴とする方法。 - 請求項1〜7のいずれか1項において、
デザインフィルムおよび/または機能的フィルム、および/または炭素繊維、ガラス繊維、および/または天然繊維の織物のテープもしくは有機シートを、上記合成樹脂の溶融物を射出する前に上記型内に配置し、上記合成樹脂の溶融物でバックインジェクション成形する
ことを特徴とする方法。 - 請求項1〜8のいずれか1項において、
上記二輪車のフレームの部品、例えば中間支柱を、合成樹脂、アルミニウム、またはその他の材料からなる完成部品として配置し、射出成形プロセスの間に熱可塑性材料と結合させる
ことを特徴とする方法。 - 請求項1〜9のいずれか1項において、
上記合成樹脂フレームの上記中空スペースに対応した断面を有しかつ流体圧力によって上記射出成形型の成形キャビティを通じて前進駆動されて一定の内径を形成するプロジェクタイルを追加的に挿入する
ことを特徴とする方法。 - 請求項1〜10のいずれか1項において、
上記流体を、上記中空スペースの形成後に循環によって追加的に冷やす
ことを特徴とする方法。 - 請求項1〜11のいずれか1項において、
使用する合成樹脂を、ポリアミド、好ましくはポリアミド12、ポリアミド6またはポリアミド6.6、ポリプロピレン、ポリエチレン、ポリエーテルスルホン、ポリエーテルイミド、ポリエーテルケトン、ポリフェニレンスルフィド、ポリ塩化ビニル、ポリエステル、アクリロニトリルブタジエンスチレン(ABS)、ポリカーボネート/アクリロニトリルブタジエンスチレン(ABC/PC)、ポリカーボネート(PC)、特に好ましくはポリブチレンテレフタレートまたはポリテレフタレートエチレンからなる群から選択し、ここで、これらの物質の各々は、単独でまたは組み合わせて選択可能であり、
上記選択された合成樹脂は、ガラス繊維、炭素繊維、および/または天然繊維の短繊維および/または長繊維によって補強可能である
ことを特徴とする方法。 - 請求項1〜11のいずれか1項において、
上記合成樹脂を、対応する活性剤を含むカプロラクタムとして上記射出成形型に射出し、加熱した上記型内で重合させる
ことを特徴とする方法。 - 請求項1〜13のいずれか1項において、
射出された上記流体は、上記型に設けられた少なくとも1つの射出装置を介して共にまたは互いに続けて導入される水、および/または気体、および/または時間的に交互に続く複数の気体である
ことを特徴とする方法。 - 請求項1〜14のいずれか1項において、
上記流体を、上記合成樹脂の溶融物によって囲まれたホース内に導入し、それによって上記流体と上記合成樹脂の溶融物との間の直接的な接触を阻止する
ことを特徴とする方法。
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