Processing Machinery
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EVA extruded pipe ovality exceeds standard
Problem Phenomenon
EVA extruded pipe ovality >1.05 exceeds the 1.02 standard requirement
Cause Analysis
Uneven pipe cooling, single-side cooling; unreasonable sizing sleeve design; uneven traction clamping force causing the pipe to deform under pressure
Solution
1) Adopt annular spray cooling to ensure uniform temperature reduction; 2) Optimize the inner diameter and taper design of the sizing sleeve; 3) Multi-track uniform clamping traction; 4) Increase the length of the vacuum sizing section to ensure full shaping
Key Takeaway
Ovality is caused by uneven cooling and clamping; annular cooling and uniform traction are key
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