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Moulding Machine Clamp Force Requirements

This information should be used as an ‘on the spot’ reference only. Users should follow the material suppliers processing data sheets.

MATERIAL CLAMP FORCE IN TONNES/SQ CM FLOW PATH/WALL THICKNESS RATIO
ABS 0.38-0.62 100-200:1
HIPS 0.15-0.31 250-300:1
CAB 0.15-0.31 300-380:1
HDPE 0.23-0.39  
LDPE 0.15-0.31  
NYLON 6 0.62-0.77 160-320:1
NYLON 6 (30% GF) 0.7-0.85 140-275:1
NYLON 6/6 0.62-0.77 180-250:1
NYLON 11 0.23-0.31  
NYLON 12 0.23-0.31  
PEEK 0.31-0.62 120-200:1
POLYCARBONATE 0.46-0.77 30-70:1
POLYESTER PBT 0.46-0.7 160-200:1
PPS 0.3-0.45 120-160:1
PET 0.39-0.75 250-400:1
PMMA ACRYLIC 0.31-0.62 120-160:1
POM 0.46-0.77 100-250:1
POLYPROPYLENE - H 0.23-0.39  
POLYSTYRENE 0.15-0.31 150-180:1
PVC 0.31-0.46  
SAN 0.39-0.46 170-200:1

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