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　　With the development of science and technology, industrial automation production is becoming more and more popular, dispensing machine plays an important role in industrial automation production. Although dispensing machine brings us great convenience in industrial production, dispensing machine will inevitably present some minor problems in the process of dispensing. So what's the reason why the glue volume of dispenser is too big or too small? Now let's listen to how the technicians of Aosong Automation analyze it.

　　氣動(dòng)式點(diǎn)膠機(jī)節(jié)制電磁閥的開(kāi)啟/封鎖可以調(diào)節(jié)點(diǎn)膠時(shí)間的長(zhǎng)短，借助減壓閥可以調(diào)節(jié)儲(chǔ)氣罐中的壓力巨細(xì)，點(diǎn)膠時(shí)間長(zhǎng)短和儲(chǔ)氣罐中壓力的巨細(xì)會(huì)直接影響膠滴的體積與形狀。

　　Pneumatic dispensing machine can control the opening/blockade of solenoid valve to adjust the dispensing time. With the help of pressure reducing valve, the pressure in the gas tank can be adjusted. The length of dispensing time and the pressure in the gas tank will directly affect the volume and shape of the rubber droplets.

　　經(jīng)由過(guò)程選用內(nèi)徑合適的點(diǎn)膠機(jī)針頭(小內(nèi)徑為60 um)，并節(jié)制氣壓和電磁閥的接通時(shí)間，采用時(shí)間—壓力型點(diǎn)膠機(jī)能獲得相當(dāng)一致的微膠滴體積和形狀。

　　By choosing the needle of dispensing machine with suitable inner diameter (small inner diameter is 60 um), and controlling the connecting time of air pressure and solenoid valve, a time-pressure dispensing machine is used to obtain a fairly uniform volume and shape of the microdroplets.

　　在氣動(dòng)式點(diǎn)膠過(guò)程中，開(kāi)始時(shí)點(diǎn)膠機(jī)針筒內(nèi)裝滿膠液，跟著點(diǎn)膠過(guò)程的不竭進(jìn)行，針筒內(nèi)的膠液體積逐漸減少，氣體體積不竭增加，在同樣的點(diǎn)膠時(shí)間和壓力下，點(diǎn)膠機(jī)點(diǎn)出的膠體量會(huì)逐漸減少。所以，針筒內(nèi)的膠量和空氣體積為時(shí)變參數(shù)，點(diǎn)膠過(guò)程是一時(shí)變大都動(dòng)態(tài)系統(tǒng)，系統(tǒng)動(dòng)態(tài)特性隨時(shí)間變化而變化。此外，空氣又有可壓縮性，因此點(diǎn)膠機(jī)點(diǎn)膠量的精度和一致性難以節(jié)制。

　　In the process of pneumatic dispensing, the needle barrel of dispensing machine is filled with glue at the beginning. Following the continuous dispensing process, the volume of glue in the needle barrel decreases gradually and the volume of gas increases continuously. Under the same dispensing time and pressure, the amount of glue produced by dispensing machine decreases gradually. Therefore, the rubber volume and air volume in the syringe are time-varying parameters. The dispensing process is a time-varying dynamic system, and the dynamic characteristics of the system change with time. In addition, the air is compressible, so the accuracy and consistency of dispensing quantity of dispensing machine is difficult to control.