全自动点胶机是在阀两端压差保持恒定的条件下，介质流经调节阀的相对流量与它的开度之间关系。调节阀的流量特性有线性特性，等百分比特性及抛物线特性三种。
　　The full automatic glue dispenser is in the condition that the pressure difference at both ends of the valve is kept constant, the medium flows through the relative flow of the regulating valve and its opening. The flow characteristic of the regulating valve has three kinds of linear characteristic, equal percentage characteristic and parabola characteristic.
　　线性特性的相对行程和相对流量成直线关系。单位行程的变化所引起的流量变化是不变的。流量大时，流量相对值变化小，流量小时，则流量相对值变化大。
　　The relative stroke of the linear characteristic has a linear relationship with the relative flow. The change in the unit stroke is the same as the change of the flow rate. When the flow rate is large, the relative value of flow is small and the flow rate is small, and the relative value of the flow is changed greatly.
　　流量按行程的二方成比例变化，大体具有线性和等百分比特性的中间特性。全自动点胶机工作原理：压缩空气送入胶瓶(注射器)，将胶压进进给管 点胶机原理图中，胶流经以固定时间、特定速度旋转的螺杆。螺杆的旋转在胶剂上形成剪切力，使胶剂沿螺纹流下，螺杆的旋转在胶剂上不断加压，使其从滴胶针嘴流出。

　　The flow rate is proportional to the two sides of the stroke, and it has the intermediate characteristics of linear and equal percentage characteristics. The working principle of the automatic dispensing machine is that the compressed air is sent to the rubber bottle (syringe), and the glue is pressed into the feed pipe dispensing machine schematic diagram, and the glue flows through the screw which rotates at a fixed time and at a specific speed. The formation of shear stress in rotary screw glue, the glue flow along the thread, the rotation of the screw in the glue on the continuous pressure, the outflow from the glue needle mouth.
　　等百分比特性的相对行程和相对流量不成直线关系，在行程的每一点上单位行程变化所引起的流量的变化与此点的流量成正比，流量变化的百分比是相等的。
　　The relative travel rate and relative flow rate of equal percentage characteristics are not linear. At each point of the stroke, the change of traffic volume caused by the change of unit stroke is directly proportional to the flow rate of this point, and the percentage of traffic change is equal.
　　所以它的优点是流量小时，流量变化小，流量大时，则流量变化大，也就是在不同开度上，具有相同的调节精度。
　　Therefore, its advantage is that the flow rate is small, the traffic volume is small, and the traffic volume is large.
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