Research Article
Study on External Gas-Assisted Mold Temperature Control for Improving the Melt Flow Length of Thin Rib Products in the Injection Molding Process
Table 1
Simulation parameters for studying melt flow length.
| Simulation parameters |
| Air inlet temperature of air drier | 30°C, 7 bar | Air outlet temperature of air drier (°C) | 30 | 200 | 250 | 300 | 350 | 400 | Air density (kg/m3) [18] | 1.165 | 0.746 | 0.680 | 0.616 | 0.570 | 0.524 | Heat capacity of air (J/kgK) [18] | 1004 | 1026 | 1035 | 1046 | 1057 | 1068 | Thermal-expansion coefficient of air (x10−3K−1) [18] | 3.32 | 2.1 | 1.93 | 1.76 | 1.64 | 1.52 | Air pressure | 1 atm | Initial temperature of mold insert | 30°C | Aluminum density - ASTM B209-14 | 2702 kg/m3 | Heat capacity of aluminum - ASTM B209-14 | 903 J/kgK | Thermal conductivity of aluminum - ASTM B209-14 | 237 W/mK | P20 steel density - ASTM A681 | 7870 kg/m3 | Heat capacity of P20 steel - ASTM A681 | 460 J/kgK | Thermal conductivity of P20 steel - ASTM A681 | 29 W/mK | Simulation type | Transient | Heating time | 0 s 30 s | Air outlet to environment | (i) Environment pressure: 1 atm | (ii) Air temperature: 30°C | Initial air volume | (i) Air velocity: 0 m/s | (ii) Air pressure: 1 atm | (iii) Air temperature: 30°C |
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