Molds & Tooling
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PC Short Shot Insufficient Filling
Problem Phenomenon
[Problem Phenomenon] PC thin-wall long flow path end is short of material
Cause Analysis
PC has high viscosity and poor flow, and the thin-wall long flow path front freezes causing short shot; insufficient temperature, pressure and speed, poor venting and too small gates are all causes; when troubleshooting on site, verify each item according to this mechanism one by one, and avoid blindly adjusting the machine based on experience alone
Solution
Increase the melt temperature, mold temperature, injection speed and pressure; strengthen venting; enlarge the gate; high-flow grades; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate effective measures
Key Takeaway
PC short shot is due to high viscosity; raise temperature, raise speed, vent and enlarge the gate; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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