幾點關(guān)于雙組份打膠機的點膠知識要點
為了幫助大家更好地保證產(chǎn)品質(zhì)量，提高生產(chǎn)效率，下面是
濟南雙組份打膠機廠家總結(jié)的幾點關(guān)于雙組份打膠機的點膠知識要點。
In order to help everyone better ensure product quality and improve production efficiency, the following are the key points of dispensing knowledge about two-component dispenser summarized by the manufacturer of Jinan two-component dispenser.
1.根據(jù)工作經(jīng)驗，膠點的直徑應(yīng)為焊盤間距的一半，粘貼后膠點的直徑應(yīng)為膠點直徑的1.5倍。這可確保有足夠的膠水來粘合組件，并防止過多的膠水浸漬焊盤。
1. According to work experience, the diameter of the glue point should be half of the pad spacing, and the diameter of the glue point after pasting should be 1.5 times of the glue point diameter. This ensures that there is enough glue to bond the components and prevents excessive glue from dipping the pads.
2.點膠壓力背壓過大容易造成溢出和膠水過量；如果壓力太小，將會有間歇的點膠和泄漏，從而造成缺陷。應(yīng)根據(jù)相同質(zhì)量的膠水和工作環(huán)境溫度選擇壓力。高環(huán)境溫度會降低膠水的粘度并提高其流動性。在這種情況下根據(jù)雙組份打膠機知識要點，可以通過降低背壓來保證膠水的供應(yīng)，反之亦然。
2. Excessive back pressure of dispensing pressure may cause overflow and excessive glue; If the pressure is too low, there will be intermittent dispensing and leakage, resulting in defects. The pressure shall be selected according to the glue of the same quality and the working ambient temperature. High ambient temperature will reduce the viscosity of glue and improve its fluidity. In this case, the supply of glue can be ensured by reducing the back pressure according to the knowledge points of the two-component glue dispenser, and vice versa.
3.實際上，針的內(nèi)徑應(yīng)該是膠水分配點直徑的1/2。點膠過程中，點膠針應(yīng)根據(jù)印刷電路板上焊盤的尺寸進行選擇:如果焊盤尺寸0805和1206沒有不同，可以選擇相同的針，但不同尺寸的焊盤應(yīng)選擇不同的針，這樣不僅可以保證膠點的質(zhì)量，還可以提高生產(chǎn)效率。
3. In fact, the inner diameter of the needle should be 1/2 of the diameter of the glue distribution point. In the dispensing process, the dispensing pin should be selected according to the size of the pad on the PCB: if the pad size 0805 and 1206 are not different, the same pin can be selected, but different pins should be selected for pads of different sizes, which can not only ensure the quality of the bonding point, but also improve the production efficiency.
4.針距印刷電路板
4. Needle pitch PCB
不同的雙組份打膠機使用不同的針，有些針有一定的停止度。針和印刷電路板之間的距離應(yīng)在每次工作開始時進行校準，即Z軸高度校準。
Different two-component dispensers use different needles, some of which have a certain degree of stop. The distance between the needle and the printed circuit board shall be calibrated at the beginning of each work, i.e. Z-axis height calibration.
5.膠水溫度
5. Glue temperature
一般環(huán)氧膠水應(yīng)儲存在0-5℃的冰箱中。使用時應(yīng)提前半小時取出，使膠水完全符合工作溫度。膠水的使用溫度應(yīng)為23℃-25℃；環(huán)境溫度對膠水的粘度有很大影響。如果溫度過低，膠點會變小，并會發(fā)生拉絲。環(huán)境溫度相差5℃將導(dǎo)致分配體積發(fā)生50%的變化。因此根據(jù)雙組份打膠機知識要點，應(yīng)該控制環(huán)境溫度，同時，還應(yīng)保證環(huán)境溫度，濕度小的膠點容易干燥，影響附著力。
Generally, epoxy glue should be stored in a refrigerator at 0-5 ℃. Take it out half an hour in advance to make the glue fully meet the working temperature. The use temperature of glue shall be 23 ℃ - 25 ℃; The ambient temperature has a great influence on the viscosity of glue. If the temperature is too low, the glue point will become smaller and wire drawing will occur. A difference of 5 ℃ in ambient temperature will result in a 50% change in the distribution volume. Therefore, according to the knowledge points of two-component glue dispenser, the ambient temperature should be controlled, and at the same time, the ambient temperature should also be guaranteed. The glue points with low humidity are easy to dry, affecting the adhesion.
The operation of two-component glue dispenser shall be carried out in strict accordance with relevant steps and precautions to avoid non-standard operation damaging the equipment, affecting the dispensing effect and endangering your own safety. You should understand these and pay attention to us http://www.dongwulife.com.cn Learn more!
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