PROBLEM TO BE SOLVED: To achieve weight reduction, wear resistance, support stabilization for rim, and facilitation of fitting in a tire by molding a toric foamed non-puncture tube through a core back injection molding method.SOLUTION: A toric foamed non-puncture tube C is molded by a core back injection molding method comprising filling an original cavity Kformed by a movable mold Fand a stationary mold Fwhen the former advances with a thermoplastic elastomer molten material including a foaming agent using a mold Afor core back injection molding, and then foaming the thermoplastic elastomer molten material M in a maximum cavity Kincreased by retreating the movable mold F. A skin layer 2 unfoamed or having a low foaming scale factor compared to a general part is formed on the whole area of an outer peripheral face in a surface layer part.SELECTED DRAWING: Figure 6-B
【課題】円環状の発泡ノーパンクチューブをコアバック射出成形法により成形することで、軽量化、耐磨耗化、リムに対する支持安定化、及びタイヤに対する嵌込みの容易化を図ることである。【解決手段】コアバック射出成形型A1を使用して、可動型F2の前進時において固定型F1とで形成される原キャビティK0に、発泡剤を含んだ熱可塑性エラストマー溶融原料を充填した後に、当該可動型F2を後退させることで増大された最大キャビティK1内で前記熱可塑性エラストマー溶融原料Mを発泡させるコアバック射出成形法により成形された円環状の発泡ノーパンクチューブCであって、未発泡、或いは一般部に比較して発泡倍率の低いスキン層2が、外周面の全面の表層部に形成された構成とする。【選択図】 図6−B
FOAMED NON-PUNCTURE TUBE, METHOD FOR FITTING THEREOF, MOLD FOR CORE BACK INJECTION MOLDING, AND INJECTION MOLDING METHOD
発泡ノーパンクチューブ、その嵌込み方法、そのコアバック射出成形型、及び射出成形方法
2016-05-16
Patent
Electronic Resource
Japanese
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