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  • News Title: Understand the PA66 engineering plastic raw materials injection molding process conditions
  • Update time: 2017-05-09
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Process conditions for injection molding of PA66 engineering plastics raw materials
Drying: If the material is sealed before processing, then there is no need to dry. However, if the storage container is opened, it is advisable to dry in a hot air of 85C. If the humidity is greater than 0.2%, also need to carry out 105C, 12 hours of vacuum drying.

Melting temperature: 260 ~ 290C. The product of glass additive is 275 ~ 280C. The melting temperature should be avoided above 300 ° C.

Mold temperature: PA66 engineering plastic materials manufacturers recommend 80C. Mold temperature will affect the crystallinity, and crystallinity will affect the physical properties of the product. For wall plastic parts, if the use of less than 40C mold temperature, the plastic parts of the crystallinity will change over time, in order to maintain the geometric stability of plastic parts, the need for annealing.

Injection pressure: usually at 750 ~ 1250bar, depending on material and product design.
Injection speed: high speed (for the enhanced material should be slightly lower).

Runners and gates: Due to the short settling time of PA66, the location of the gate is very important. The gate diameter should not be less than 0.5 * t (where t is the plastic part thickness). If hot runner is used, the gate size should be smaller than using a conventional flow path because the hot runner can help prevent premature solidification of the material. If the submersible gate is used, the minimum diameter of the gate should be 0.75mm.