Extrusion & Post 10 조회수

Bending deformation of EVA extruded profiles

문제 현상

EVA extruded profiles continuously bend after cooling with deflection >5mm/m

원인 분석

Uneven cooling on each face of the profile causes shrinkage differences; uneven die exit flow velocity makes each wall thickness of the profile different; haul-off and extrusion centerline misaligned producing lateral force

해결 방법

1) Optimize cooling system to ensure uniform cooling on each face; 2) Adjust die to make each wall flow velocity uniform and wall thickness consistent; 3) Align haul-off with extrusion centerline; 4) Increase sizing sleeve length to cool after full sizing

핵심 요약

Profile bending is caused by uneven cooling and uneven flow velocity; homogenization and alignment are the key to solution

EVA extrusion bending deformation uniform cooling uniform flow velocity sizing sleeve

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Bending deformation of EVA extruded profiles

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