The work principle of double insurance level switch, float design, mold design and steam foaming molding technology are introduced.
从双保险式液位开关的工作原理，浮子产品结构设计，模具设计，蒸汽发泡成型工艺等方面逐一进行介绍。
2
The mathematical model of the growth process of the bubble in the foamingmold of polymers is of great importance to studying the growth behave of the bubble.
The characteristic and application of the foam, and the requirement of the forming technology is described in the paper. In the same time, the foamingmold is introduced.