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Related knowledge about injection molding (1 of 2)
Upadta time:2013/11/21 3:21:49
c. Mold Temperature: Mold temperature affects greatly product internal performance and surface quality. Mold temperature is decided by with or without plastic crystalline, product dimensions and structures, property requirement and its technological conditions (material melt temperature, injection speed, injection pressure and cycle time etc).
2. Pressure Control
The pressure during injection includes plasticization pressure and injection pressure, and directly affect plastic plasticization and product quality.
a. Plasticization pressure: (back pressure) when injected with screw injection machine, the pressure on plastic material when screw move backward is called plasticization pressure, also named back pressure. The pressure can be adjusted by tuning flood value of hydraulic system. During the injection, the plasticization pressure remains same as long as screw rotating speed is the same, the melted material temperature will increase once increase plasticization pressure, but the plasticization speed will reduce.
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