Dispenser operating procedure FAQ
Publish：电子产品全自动柔性组装线,深圳市豪林精密机械有限公司 Time：2013-12-25
The most common problem encountered is the dispenser valve problems , to solve the following problem occurs when using plastic valves often an effective way .
One of the common problems process dispenser drip dispensing valve operation
1 After this happens often related to the completion of the dispensing valve .
2.95% of such cases are caused because the caliber of the needle used is too small.
3 small needles will affect the flow of the liquid causes back pressure , resulting in the formation of the phenomenon shortly after the completion of drip dispensing valve closed . The needle is too small will affect exhaust valve begins to bubble gum action when used as long as the replacement of a large needle to solve this problem.
4 backpressure tapered helical needle produces the least liquid flow most smoothly.
5 after the air within the liquid dispensing valve produces complete drip off phenomenon , it is best to preclude liquid air , or use of a bubble-containing gel is not easy . Centrifugation or gel first using the deaeration .
Two sizes of glue dispensing operation process inconsistencies FAQ
1 When the glue is inconsistent mainly for storage of fluid pressure cylinder or air pressure generated by instability .
2 meter inlet pressure regulator should be set at the lowest of low pressure over the factory 10 to 15psi., The pressure should be between the pressure tube using a pressure regulator above the middle of the table , you should avoid using a pressure gauge between being low pressure parts.
3 dispensing valve control pressure should be at least 60psi or more in order to ensure the stability of the plastic .
4 Finally, you should check out the glue time if less than 15 / 1000 seconds will cause the plastic instability . , Glue glue more time to grow more stable .
Three of the flow rate is too slow process of dispensing operations FAQs
1 If the flow rate is too slow pipeline should be from 1/ 4 "to 3/8 ."
2 If there is no need for the pipeline should be as short as possible .
3 In addition to change the tube , but also change the plastic mouth and pressure , so full speed up the flow rate.
Four bubbles within the fluid dispensing process operating FAQ
1 . Excessive fluid pressure if coupled with the valve open time is too short compared with the liquid may penetrate the air . Solutions to reduce the fluid pressure and the use of conical oblique needle .
2 V. glue dispensing operation of the process FAQ blocked.
3 such cases is mainly due to excessive moisture or repeated used instant glue . Be sure to use fresh, instant glue . The pipeline does not contain moisture Aceton with acetone thoroughly cleaned . After air drying for use should be determined between the plant and the installation of pneumatic valve system with plastic filter . ( If the above method does not work, you should use nitrogen ) .
Dispensing needle selection method :
1 . Four criteria : a small point - small needles, low- pressure , short-term high point - a large needle , greater pressure , longer concentrated glue - inclined needles, greater pressure , the time needed to set an aqueous liquid - small needles, small pressure needed to set the time .
2 . Fluids require special settings :
( 1 ) instant glue : water-based instant glue safe piston and Teflon -lined metal needles, for the thick of instant glue , use a tapered helical needle , For flexible use PP needle.
(2) UV glue : Use amber syringes, needles white piston and inclined (which can block ultraviolet ) .
( 3 ) light-curing adhesive: use black opaque syringes, white piston , the needle can block ultraviolet .
( 4 ) Anaerobic : Use 10CC syringes and white PE common piston .
( 5 ) and paste sealant fluid : If using white piston rebound serious , please use the security style living style , using oblique needle .
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