The problem of floating fiber can generally be solved from three aspects, one material, three is the process, and four additives.
Material: The use of short fiber and low viscosity Pa substrate, short fiber performance is relatively good, accurate measurement, but need a side feed system and weight loss electronic metering system.
Process:
1. Appropriately increase the shearing force of the screw;
2, the injection speed is increased, the screw speed can be adjusted to 70%-90%;
3. Increase the injection pressure;
4, the entire screw retracts 1-2MM to prevent the spout from floating;
5. Staged injection molding for complex parts.
Additives: Add 0.3%-0.6% silicone and 0.5%-0.8% surfactant (such as dispersant, etc.)
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