Injection molding is of great importance to our industry. Its main advantages are: fast production speed, high efficiency and automation, wide variety of designs and colors, simple to various shapes, large to small sizes, and easy upgrade of sizes and products. Injection molding is suitable for mass production of products with complex shapes and processing fields.
Several important parameters affecting injection molding production are listed below:
The injection pressure is provided by the hydraulic system of the injection molding system. The hydraulic cylinder pressure is transferred to the plastic melt through the screw of the injection molding machine. Almost all injection pressure is based on the pressure applied at the top of the plunger or screw on the plastic
Back pressure is the pressure to overcome when the screw is reversed. The pressure can be adjusted through a safety valve in the hydraulic system. Increasing the plasticizing pressure usually causes the melt to be uniform in temperature, the colorant to be uniform in mixing, and the gas to be discharged from the melt.
It is usually necessary to pay attention to two parts in the temperature parameter, one is the nozzle temperature, and another is the mold temperature. The nozzle temperature must not be too low, otherwise the melt will condense prematurely and block the nozzle, or the product performance will be affected by the injection of early aggregate into the cavity. The mold temperature has a great influence on the inherent performance and appearance quality of the product. Mold temperature depends on the presence of crystallization of the plastic, the size and structure of the product, performance requirements, and other forming process conditions