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How does jetting happen and how to improve this problem?
Jetting occurs when polymer melt is pushed at a high velocity through restrictive areas, such as nozzle, runner, or gate, into open, thicken area, without forming contact with the mold wall.
Remedies used to eliminate jetting are: reducing the melt velocity by adjusting the injection speed, enlarging the gate, and promoting the melt-mold contact by locating the gate in such a way that the flow is directed against a cavity wall.
Remedies used to eliminate jetting are: reducing the melt velocity by adjusting the injection speed, enlarging the gate, and promoting the melt-mold contact by locating the gate in such a way that the flow is directed against a cavity wall.
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