|
Possible causes
|
Recommendations to resolve
|
|---|
|
Injection molding machine
|
1.In the fusion line of plastic temperature is too low.
|
1.Increase the melt temperature.
|
|
2.Increase the jet nozzle temperature.
|
|
3.Adjust the screw back in time.
|
|
4.Increase the back pressure.
|
|
2.Effective cavity pressure is too low.
|
1.Increase the injection pressure.
|
|
2.Increase the screw forward time.
|
|
3.To maintain the correct melting bedding.
|
|
3.Melt fusion is too slow or too fast.
|
1.Adjust the injection speed.
|
|
2.Adjust the screw speed to provide a higher degree of melt temperature on the surface.
|
|
Mold
|
1.Use a lot of release agents.
|
Clean mold; reduced or no use of release agent
|
|
2.Mold surface is too cold.
|
1.Increase mold temperature.
|
|
2.Limit the speed of coolant flow through the die.
|
|
3.Lack of exhaust in the mold.
|
Vents added or reduced gate junction zone length.
|
|
4.Gate and runner size are too small.
|
1.Runner diameter increase.
|
|
2.Increase the size of gate or gate junction area of reduced length.
|
|
5.Fusion line is too far away from the gate area location.
|
1.Change the location of gate to get a different mould filling (gate and the splice line some distance too long).
|
|
2.Raising with hot water and reduced gate length of the note.
|
|
Plastic
|
Plastic viscosity is too high and not fill the mold.
|
Change to more easy-flow plastic level.
|
