Why are my injection molded parts turning black?
Black specks tell the processor that there is certainly some level of contamination present within the system. Black / brown specks can almost always be attributed to a heat or residence time causation. There are times when a post-molded part can come in contact with grease or dirt on the molding surface.
How to fix this injection molding defect white spots around gate area?
— NUTT-Plastic Mold Maker, Injection Molding How to Fix this Injection molding Defect white Spots around Gate area? This white spots issue happened on a high gloss product in black color, which was not found on tryouts, but on mass production after injection molding about 50 shots.
What to use to remove black specks from injection molded parts?
A good commercial grade purging compound like Asaclean is the best solution for purging the system of degraded material so the processor can reestablish the process with a clean screw and barrel. It is always a good idea to use a purging compound when changing over resins that will run on the same press.
What’s the difference between black and blue injectors?
But I don’t know if that is the differance between the black and blue dot… If you use low impedance injectors on a High ecu without adding resitors you will fry the ECU and if you run high on a low ecu your injectors will not fire correctly.
How do you know when to replace a fuel injector?
Another effective test is to measure the pressure loss in the fuel rail when each injector is fired and pulses for a set period of time. Use an electronic injector pulse tester for this. As each injector is energized, a fuel pressure gauge is observed to monitor the drop in fuel pressure.
What causes a fuel injector to stop delivering fuel?
An injector becomes clogged with fuel varnish deposits and fails to deliver its normal dose of fuel when it’s energized, or. Fuel pressure to the injector drops below specifications because of a weak fuel pump, plugged fuel filter or leaky fuel pressure regulator.
How to fix ” Black Death ” injector seal leakage?
How to fix “Black death” injector seal leakage on a T1N Sprinter [02-06 Dodge/FL/MB] – YouTube Do you smell diesel exhaust in your HVAC air vents? Is there black tar/oil/soot/goo around your injector? Do you see puffs of smoke leaking from the top of t… Do you smell diesel exhaust in your HVAC air vents?