Wherever possible, existing procedures are being re-evaluated and replaced with more efficient processes and equipment designed to boost yields and improve component reliability. Many companies that use epoxies and other adhesives during their assembly processes are discovering that changing the way these materials are applied can be an extremely effective way to help them increase their output and profitability. Typically, the epoxy is applied to the tiny opening at the back end of the ferrule until it begins to ooze out the other end. The fiber is then pushed through the back of the ferrule until it emerges at the ferrule face. Another method is to place a small amount of epoxy at the back of the ferrule and use the sliding action as the fiber is inserted to spread it through the ferrule.
Some manufacturers insert the fiber first and then apply epoxy.
Regardless of the method used, several problems can result if epoxy application is not consistent. For example, if too much epoxy is applied, extra time will be needed to clean off the excess and polishing time may be extended. Underapplication can also weaken the pull strength of the connector so that the fiber breaks or fractures during routine handling and installation. Regardless of the method used, several problems can result if epoxy application is not consistent. The medical-type hand syringes that are often used for this application have several drawbacks.