Home » Troubleshooting » Stringing Issues Solutions
Stringing Issues Solutions
Regarding your stringing issue you can check these points:
Melt temperature too high:
=> Decrease melt temperature.
Decrease hot runner temperature.
Decrease screw rotation speed.
Decrease hot runner temperature (avoid nozzle
freezing).
Gate area too hot:
=> Decrease mold temperature.
Check contact tightness between nozzle tip and
mold.
Check mating between nozzle tip and mold.
Check isolation cap thickness.
Use colder nozzle / cone point insert.
Temperature sensor position:
=> Sensor too far from heating, in a cold area.
Place the sensor closer to heating.
Temperature sensor function:
Correct sensor type (K, J)?
Correctly calibrated controller (K, J)?
As you are on open gate nozzles it is important to have a fine tuned decompression and if it isn't enough you should move the injection unit backward after screw metering and before the opening of the tool. This will avoid to have to much pressure inside the hot runner.
Melt temperature too high:
=> Decrease melt temperature.
Decrease hot runner temperature.
Decrease screw rotation speed.
Decrease hot runner temperature (avoid nozzle
freezing).
Gate area too hot:
=> Decrease mold temperature.
Check contact tightness between nozzle tip and
mold.
Check mating between nozzle tip and mold.
Check isolation cap thickness.
Use colder nozzle / cone point insert.
Temperature sensor position:
=> Sensor too far from heating, in a cold area.
Place the sensor closer to heating.
Temperature sensor function:
Correct sensor type (K, J)?
Correctly calibrated controller (K, J)?
As you are on open gate nozzles it is important to have a fine tuned decompression and if it isn't enough you should move the injection unit backward after screw metering and before the opening of the tool. This will avoid to have to much pressure inside the hot runner.
Post a Comment:
You may also like:
Category
Featured Articles
How to Choose a Good Chinese Injection ...
It is very important to choose a good mold manufacturer, because they not only can provide you with satisfactory molds, but also ...

Precision Injection Mold Technology in ...
The development of precision injection molds, precision injection molding was first produced in the 1970s. With the development ...

Plastic Injection Molding Process ...
The propositions behind injection molding process simulation are very basic. First, that although our plastic materials and ...

Visit injection molding factory in ...
Not being in the injection molding industry, I was looking for tips on how to judge a company or factory on their capability or ...

Injection Mold Cooling Design
The design of the injection mold cooling system is very important. The cooling time takes up 70% to 80% of injection molding ...
