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Molding conditions

Contents Introduction Cautions in molding Molding machines Molding conditions
Molding characteristics Product design Mold design Countermeasures for defects  
Standard conditions Pre-drying Setting values Nitrogen purge of hopper Measures against stringiness
List of TOPAS® COC grades This page's PDF(2.41MB)
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4. Molding conditions

4.1 Standard conditions

Table 4-1 shows standard molding conditions of TOPAS® COC.

 

Table 4-1 Standard molding conditions

Grade 5013-xx 6013-xx 6015-xx 6017-xx 8007-xx
Cylinder temperature (°C) Nozzle 250 - 320 250 - 320 270 - 300 290 - 300 190 - 300
Metering 250 - 320 250 - 320 270 - 300 290 - 320 190 - 300
Compression 240 - 320 240 - 320 250 - 300 270 - 320 180 - 300
Feed 220 - 320 220 - 320 240 - 300 260 - 320 170 - 300
Mold temperature (°C) 80 - 120 110 - 120 125 - 135 125 - 136 50 - 60
Injection pressure (MPa) 40 - 120 40 - 120 40 - 120 40 - 120 40 - 120
Injection speed (mm / sec) 30 - 300 20 - 100 20 - 100 20 - 100 20 - 100
Screw rotation rate (rpm) 80 - 200 80 - 200 80 - 200 80 - 200 80 - 200
Back pressure (MPa) 5 - 15 5 - 15 5 - 15 5 - 15 5 - 15
Drying Temperature (°C) 100 100 100 100 (60)
Time (hr) 6 6 6 6 (24)

 

← Previous Next →
Standard conditions Pre-drying Setting values Nitrogen purge of hopper Measures against stringiness
Contents Introduction Cautions in molding Molding machines Molding conditions
Molding characteristics Product design Mold design Countermeasures for defects