全自動點膠機是在閥兩端壓差保持恒定的條件下，介質流經調節閥的相對流量與它的開度之間關系。調節閥的流量特性有線性特性，等百分比特性及拋物線特性三種。
　　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.
　　線性特性的相對行程和相對流量成直線關系。單位行程的變化所引起的流量變化是不變的。流量大時，流量相對值變化小，流量小時，則流量相對值變化大。
　　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變化，大體具有線性和等百分比特性的中間特性。全自動點膠機工作原理：壓縮空氣送入膠瓶(注射器)，將膠壓進進給管 點膠機原理圖中，膠流經以固定時間、特定速度旋轉的螺桿。螺桿的旋轉在膠劑上形成剪切力，使膠劑沿螺紋流下，螺桿的旋轉在膠劑上不斷加壓，使其從滴膠針嘴流出。

　　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.
　　等百分比特性的相對行程和相對流量不成直線關系，在行程的每一點上單位行程變化所引起的流量的變化與此點的流量成正比，流量變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.
　　所以它的優點是流量小時，流量變化小，流量大時，則流量變化大，也就是在不同開度上，具有相同的調節精度。
　　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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