国外的空气冲击造型机所使用的冲击阀，主要有圆盘阀及栅格阀两种，其各有特点。
On abroad, impact valves incorporated in air impact molding machine are mainly disc valve and grid valve. Each of these has its own characteristic.
电动阀的驱动一般是用电机，比较耐电压冲击。
Electric valve drive motor is generally used to compare the impact resistance to voltage.
本文介绍了针阀式缓冲气缸和溢流式缓冲气缸的结构及工作原理。通过仿真计算比较了它们的缓冲特性和吸收冲击的能力。
The structure and principle of needle valve cushion and relief valve cushion were introduced. Cushion performance and capacity of absorbing impact were compared by simulation.
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