Do You Know the Main Process Parameters of Injection Plastic Parts?

1. Cylinder temperature of injection plastic parts:

The temperature of the melt is very important and the temperature of the injection cylinder used is only indicative. Glue temperature can be measured at the nozzle or by air injection. The temperature setting of injection cylinder depends on melt temperature, screw speed, back pressure, injection volume and injection part cycle. If you have no experience processing a particular grade of plastic, start with the lowest setting.

For ease of control, the cylinder is divided into zones, but not all are set to the same temperature. If OPERATING FOR a long time or at high temperatures, set THE temperature of Zone 1 to a lower value. This will prevent premature melting and shunting of plastics. Ensure that the hydraulic fluid, hopper sealer, mold and injection cylinder are at the correct temperature before injection plastic parts begin.

2. Melting temperature of injection plastic parts:

Melt temperature of the melt flow behavior plays a main role, because no specific plastics, melting point, the melting point is a segment of the temperature of the molten state, the plastic different molecular chain structure and composition, and therefore have different influence on its liquidity, molecular chain rigidity affected by temperature is obvious, such as PC, PPS, and flexible chain, such as: The fluidity of PA, PP, PE is not obvious by changing the temperature, so the reasonable temperature of plastic injection molding parts should be adjusted according to different materials.

3. Mold temperature of injection plastic parts:

Some plastic materials due to high crystallization temperature, crystallization speed is slow, need a higher mold temperature, some due to the control of size and deformation, or the need for demold, to a higher temperature or lower temperature, such as PC general requirements of more than 60 deG C, and PPS in order to achieve a better appearance and improve fluidity, mold temperature sometimes need more than 160 DEG C, Therefore, the mold temperature can not be underestimated in improving the appearance, deformation, size of the product, and the rubber mold.

4. Injection pressure of injection plastic parts:

Melt to overcome the resistance required to advance, directly affect the size, weight and deformation of the product, different plastic products need different injection pressure, for materials such as PA, PP, increasing the pressure will make its liquidity significantly improved, injection pressure determines the density of the product, that is, the appearance of luster. It has no fixed value, and the more difficult the mold is to fill, the more pressure the plastic injection molding parts will have.