Extrusion & Post 8 views

DSTDP extrusion rough surface

Problem Phenomenon

DSTDP extruded product surface roughness Ra>5μm, exceeding requirements

Cause Analysis

Extrusion temperature on the low side <160°C, melt flow unstable; die inner wall rough or damaged; DSTDP melt elasticity, extrusion swell uneven

Solution

1) Raise extrusion temperature to 160-200°C; 2) polish die inner wall Ra<0.4μm; 3) reduce extrusion rate 10-15%; 4) add 0.3-0.5wt% external lubricant

Key Takeaway

Rough surface is caused by low-temperature extrusion and die defects; raising temperature and polishing the die are the core countermeasures

DSTDP extrusionrough surfacedie polishingextrusion temperaturemelt elasticity

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