阅读说明：本技术 零或低拔模角注射模制方法和系统 (Zero or low draft angle injection molding method and system ) 是由 罗昱凯 杰森·古尔登 于 2020-05-08 设计创作，主要内容包括：描述了用于注射模制的技术。当工具的腔体内的材料被凝固成模制零件时,工具会在该零件上赋予精加工表面,该零件包括零或低拔模角的侧壁。为了在不使用套筒或滑块的情况下允许与腔体分离,就在要顶出零件之前,腔体变宽。该工具由具有高热膨胀系数的金属制成,因此可以使用温度控制来管理腔体的大小。施加到腔体周围的金属的外部部分的热量将金属拉离零件,从而在腔体内形成气隙。小心地对金属的内部部分施加冷却可以阻挡热量,并控制表面温度,从而保留零件上的精加工表面。当气隙允许时,零件从腔体中释放,精加工表面完好无损。(Techniques for injection molding are described. When the material in the cavity of the tool is solidified into a molded part, the tool imparts a finished surface on the part, which includes zero or low draft angle sidewalls. To allow separation from the cavity without the use of a sleeve or slide, the cavity is widened just prior to ejection of the part. The tool is made of a metal with a high coefficient of thermal expansion, so temperature control can be used to manage the size of the cavity. Heat applied to the outer portion of the metal around the cavity pulls the metal away from the part, thereby forming an air gap within the cavity. Careful application of cooling to the interior portion of the metal can block heat and control surface temperature, thereby preserving the finished surface on the part. When the air gap allows, the part is released from the cavity and the finished surface is intact.)