How to deal with extruder blockage in 3D printing? In each printing process, the 3D printer must melt and extrude a large amount of plastic. In order to make complex things, all plastic must pass through the extruder through the hole.Inevitably, some problems may arise in this process, which will prevent the extruder from extruding plastic from the nozzle.This blockage is usually due to the fact that something in the nozzle blocks the free extrusion of plastics.If you encounter such problems, novices will naturally feel headache, then we will introduce some simple troubleshooting steps to repair blocked nozzles. 1. Manually push consumables into the extruder: The extruder is heated to a temperature suitable for plastics, then a liquid crystal screen is used to control the extruder (for example, 10mm) to extrude a small amount of plastics, and Cura can be used to control the machine without liquid crystal screen.When the motor of the extruder starts to rotate, push the consumables into the extruder gently by hand.In many cases, this extra force is enough to force consumables through the problem area. 2. Reloading consumables: If the consumables are still not moving, the next thing to do is to unload the consumables.Make sure that the extruder is heated to the appropriate temperature, and then use LCD control to remove consumables from the extruder.Cura can be used to control machines without LCD.As before, if the consumables do not move, you may need to exert a little extra force.When consumables are pulled out, use scissors to cut off some melted or damaged parts.Then reload the consumables to see if your extruder can extrude new, undamaged consumables. 3. Clean nozzles: If the new consumables still cannot be extruded, it seems that you only need to clean the nozzle before continuing to print.Many users have successfully solved this problem by heating the extruder to 100 degrees and then manually removing consumables, which is expected to pull the plug out of the nozzle.Or use medical silver needle reversal nozzle, 0.4mm nozzle can use 0.35mm diameter silver needle, and so on.You can also use the E-string of the guitar.There may be many other ways, different extrusion opportunities vary, so consult your printer manufacturer for accurate instructions.