微孔发泡注塑设备注入气体常采用“限流元件控制超临界流体(SCF)流速”的方式。由于压差的存在,这种注气方式每次在打开气体注射器的瞬间会产生气涌,从而影响机筒内单相溶液的制备,进而降低发泡制品的质量。本文通过设计实验定量研究了气涌与压差及限流元件孔径间的关系,为微孔发泡注塑精确注气提供了参考。 Microfoam injection molding equipment injection gas often used “flow control element flow of supercritical fluid (SCF) ” approach. Due to the pressure difference, this gas injection method will generate gas surge each time the gas injector is turned on, thus affecting the preparation of the single-phase solution in the cylinder and further reducing the quality of the foamed product. In this paper, the relationship between the pressure surge and the aperture of the current-limiting element is quantitatively studied through the design experiment, which provides a reference for precise injection of microporous foam injection molding.