How does the injection valve work?
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Release Time：2023-02-28
Every kind of thing has its value, in our daily life, there are many inseparable things and products. So in the industrial field, there are a lot of machinery and equipment in different areas to play their role, the injection valve is no exception, today we will talk about some basic information about the injection valve.
Every kind of thing has its value, in our daily life, there are many inseparable things and products. So in the industrial field, there are also a lot of machinery and equipment playing their role in different fields,injection valveNo exception, today we will talk aboutinjection valveSome basic information about? If you are interested, please continue to read down.
Piezoelectricinjection valveUsing the inverse piezoelectric effect of piezoelectric materials, the ejection frequency is high, the equipment structure is simple, and the ejection can be obtained with a diameter as small100On the other hand, the control accuracy of the piezoelectric structure is high, which improves the quality of the jet distribution. However, the throughput of the piezoelectric jet distribution is low. In order to increase the flow rate of the jet, it is necessary to use an amplification mechanism or increase the volume of the jet device; in addition, the piezoelectric material used is relatively fragile and prone to aging. Piezoelectricinjection valveDevices are currently classified into the following two types.HeadOne type of piezoelectric jet delivery has become the main competitor of thermal inkjet printing technology for the injection of organic pigmentsLEDOperating frequency up20kHz.injection valveThe deformation of the piezoelectric material directly pushes the fluid to move, and the fluid is accelerated from the nozzle under the action of the internal and external pressure difference to form droplets. The advantage of this technology is that it can use a setinjection valve, eject tiny droplets of material at very high speeds. But it can only be used for spraying viscosity less0.0a·sOf the fluid material, there are bubbles in the fluid will make spraying difficult. The second kind of piezoelectric dispensing dispensing method is to quickly open and close the nozzle, the typical product of this type of dispensing machine is the United States.EFDThe company'sPicdotSeries dispensing valve, its dispensing frequency can reach200Point/Seconds.
When the rod is connected to the nozzle, the injection valve is closed and the fluid in the injection valve is under higher pressureThe pressure of the fluid exceeds0,2MPa, And the pressure in the injection valve exceeds the material with high viscosity will be higher), then open the nozzle, a stream of fluid flows out of the nozzle quickly under pressure, and then close the nozzle, the rapid closing will cut off the fluid and the kinetic energy obtained by this fluid It can make it fly away from the nozzle to reach the substrate at a certain speed. among them,injection valveofThe opening and closing of the valve is controlled by a piezoelectric actuator, which is used in conjunction with a lever system or a displacement amplification mechanism to achieve precise and fast valve opening and closing. In order to accurately control the amount of liquid escaping from the nozzle, the opening and closing of the nozzle must be fast and repeatable. In order to obtain smaller droplets, smaller nozzle sizes are required, resulting in higher fluid control pressures and faster valve opening and closing. This projection technology has been used to package electronic equipment.UVGreat success in curing adhesives.
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2026/02/28
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