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    • 5. 发明授权
    • Method of metering molding compound and a metering system for carrying
out the same
    • 测量成型化合物的方法和实施该方法的计量系统
    • US5238147A
    • 1993-08-24
    • US940990
    • 1992-09-04
    • Seiji YasuiMasanobu Kurumaji
    • Seiji YasuiMasanobu Kurumaji
    • B29C45/17B29C45/18B29C45/53B29C45/82
    • B29C45/53B29C45/1808B29C45/82
    • A molding compound metering system meters a molding compound in supplying the molding compound from a molding compound stocker into the injection chamber of an injection barrel by detecting the backward stroke of the injection plunger of an injection cylinder, axially slidably fitted in the injection chamber and detecting the pressure of the molding compound in the injection chamber of the injection barrel. When the injection plunger is moved backward by the pressure of the molding compound supplied into the injection chamber, the discharge of the working fluid from the back working chamber of the injection cylinder is regulated to apply back pressure to the injection plunger by an adjustable-pressure relief valve, and a regulated pressure is applied to the front working chamber of the injection cylinder. Thus, the adjustable-pressure relief valve is able to regulate the back pressure in a relatively high pressure range and, consequently, the back pressure can be accurately regulated to enhance the reliability of the metering operation.
    • 成型复合计量系统通过检测注射缸的注射柱塞的向后冲程,将成型化合物从模制复合储料器供应到注射筒的注射室中,测量模制化合物,其轴向可滑动地装配在注射室中并检测 注射筒的注射室中的模塑料的压力。 当注射柱塞通过供给到注射室的模塑料的压力向后移动时,调节来自注射缸的后部工作室的工作流体的排放,以通过可调压力向注射柱塞施加反压力 安全阀,并且调节压力施加到注射缸的前工作室。 因此,可调压力释放阀能够在相对高的压力范围内调节背压,因此可以精确地调整背压以提高计量操作的可靠性。