Injection molding process conditions for PA66 engineering plastic material

Drying Process: If the material is sealed before processing, there is no need for drying. However, if the storage container is opened, it is recommended to dry in 85°C hot air. If the humidity exceeds 0.2%, a vacuum drying process at 105°C for 12 hours is required.

Melting Temperature: 260~290°C. For glass additives, the range is 275~280°C. Avoid melting temperatures above 300°C.

Mold Temperature: PA66 engineering plastic material manufacturers recommend 80°C. Mold temperature affects crystallinity, which in turn impacts the physical properties of the product. For wall-shaped parts, if a mold temperature below 40°C is used, the crystallinity of the molded part will change over time. To maintain the geometric stability of the part, annealing treatment is required.

Injection Pressure: Typically ranges from 750 to 1250 bars, depending on material and product design.

Injection Rate: High speed (slightly lower for enhanced materials).

 Flow Channels and Gateways: Due to the short solidification time of PA66, the position of the gate is crucial. The gate diameter should not be smaller than 0.5 times the thickness of the plastic part (here t refers to the thickness of the part). If using hot runners, the gate size should be slightly smaller than that of conventional runners, as hot runners can help prevent premature solidification of the material. For an insert gate, the small diameter of the gate should be 0.75mm.