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    • 7. 发明授权
    • Gusseted double-walled box formed of draped and blow molded parison
    • 由双层和吹塑成型型坯形成的双层双层框
    • US4993582A
    • 1991-02-19
    • US437450
    • 1989-11-15
    • George F. Arp
    • George F. Arp
    • B29C49/00B29C49/42B29C49/48B29C55/24B29C57/10
    • B29C49/0031B29C49/4247B29C49/4817B29C55/24B29C57/10B29L2031/7158
    • A gusseted double-walled box is formed of a parison that is draped and blow molded according to the following process. A blow molding parison (10) being draped around a generally rectangular mold part (12) is spread from its extruded cylindrical shape into a generally rectangular shape (14), as it descends from an extrusion head (11). Before the open bottom (20) of the parison reaches a clamp (25) on the mold part, a jet of air is blown downward through the open bottom to draw in the parison's side and end regions (21 and 22 respectively). This reduces the size of parison (10) and helps it fit within the clamp and also forms the end regions (22) of the parison into a pair of opposed pleats (23) extending inward from the ends of the pinch-off line when clamp (25) closes. Further descending of the parison unfolds the pleats into gussets (24) extending toward corner regions (27) of mold part (12) so that the parison can drape around the mold part corners. The resulting box has gussets formed on an internal wall to extend from the pinch-off line, as can be seen by cutting away the box bottom.
    • 角撑板双壁箱由根据以下方法被覆盖和吹塑成型的型坯形成。 围绕一个大致矩形的模具部件(12)围绕的吹塑型坯(10)从挤出的圆柱形状扩展成大致矩形的形状(14),当其从挤压头(11)下降时。 在型坯的开口底部(20)到达模具部件上的夹具(25)之前,将空气射流向下穿过开口底部以分别吸入型坯侧和端部区域(21和22)。 这减小了型坯(10)的尺寸并且有助于其适配在夹具内并且还形成型坯的端部区域(22),以形成从夹紧线的端部向内延伸的一对相对的褶皱(23) (25)关闭。 型坯的进一步下降将褶皱展开成延伸到模具部件(12)的拐角区域(27)的角撑板(24),使得型坯可以围绕模具部分角部覆盖。 所得到的盒子具有形成在内壁上的角撑板以从夹紧线延伸,如可以通过切掉盒底部所见的那样。