Injection molding refers to a certain temperature, through the screw stir completely molten plastic materials, with high pressure injection into the mold cavity, after cooling and curing to get the molding method.This method is suitable for mass production of complex parts and is one of the important processing methods.There are mainly 6 stages of mold closing, injection, pressure holding, cooling, mold opening and product taking out.
Five elements of injection molding
1. Temperature: cylinder temperature, material temperature, mold temperature, drying temperature, oil temperature, environmental temperature, etc
Temperature refers to the melting temperature of the plastic in the machine cylinder. The heat generated by the screw shear when the molten material passes through the injection port is an important factor affecting the injection pressure.
2. Pressure: injection pressure, maintenance pressure, back pressure, release pressure, mold opening pressure, mold locking pressure, etc
Pressure refers to the melting temperature of the plastic in the machine cylinder. The heat generated by the screw shear when the molten material passes through the injection port is an important factor affecting the injection pressure.
3. Time: injection time, holding time, cooling time, drying time, metering delay time, etc
Time refers to the time required for the plastic melt to fill the mold cavity, excluding the auxiliary time of mold opening and closing.
4, speed: injection speed, return speed, open and close speed, release speed, etc
With the pressure to complete the required speed of action procedures (system hydraulic fluid flow), mainly according to the temperature of plastic melting and material flow.
5. Position: metering position, ejection position, mold opening position, etc
Position refers to the single weight of the molding product required by the amount of glue screw travel, in the action of the fast and slow, high and low pressure between the switching point.