A detailed explanation of the principle of vacuum SMT nozzle suction

1. No material throwing (the material throwing rate is within the allowable range);
2. No slippage (Insufficient vacuum suction force will cause the components to slip during movement after detection);
3. Non-stick material (the components are reliably separated from the suction nozzle after being mounted in place).

The principle of vacuum suction is to utilize the force formed by the pressure difference between the vacuum system and the atmosphere to achieve the grasping and moving of objects. This method of fixing or moving objects by utilizing pressure differences has many applications in daily life, such as vacuum cleaners, vacuum suction hooks, and cupping in traditional Chinese medicine. In industrial production, the application of vacuum is even more extensive.

According to the principles of fluid mechanics, all objects in the Earth's atmosphere are subject to the effect of air gravity. This force is the effect of atmospheric pressure. The atmospheric pressure per unit area is called atmospheric pressure intensity. The standard atmospheric pressure on the ground (1 atm) is approximately equal to the pressure (mmHg) produced by a 760-millimeter-high mercury column. Different fields, countries and regions use different units of pressure. Here are the commonly used units of pressure in this technology.

The vacuum usually referred to is a state where the pressure of gas is lower than that of the atmosphere, rather than a "vacuum" with no air at all. That is to say, the gas in a vacuum is thinner than that at atmospheric pressure. The thinness of a gas in a vacuum state is measured by "vacuum degree". Conventionally, a high vacuum degree indicates that the gas pressure is much lower than the atmospheric pressure. A low vacuum degree indicates that the gas pressure is less than the atmospheric pressure.