Air vent is a groove-shaped air outlet opened in the mold to discharge the original gas and the gas brought in by the melt. When the melt is injected into the cavity, the air originally stored in the cavity and the gas brought in by the melt must be discharged out of the mold through the Air vent port at the end of the material flow, otherwise, the product will have pores, poor connection, Filling the mold is not satisfied, and even the accumulated air will burn the product due to the high temperature caused by compression.

There are two main functions of the high precision plastic injection mold Air vent:

One is to remove the air in the mold cavity when the molten material is injected;

The second is to eliminate various gases generated during the heating process of the material.

The following are the points to pay attention to for the high precision plastic injection mold Air vent

Points to note in the design of the contact surface

1. It is difficult to assemble and disassemble in mass production. The exhaust pin with a diameter of less than 2.0mm is cancelled, and the split insert is used for exhaust.

2. For exhaust needles with a diameter of more than 2.0mm, the head of the 2~3mm mold core is positioned, and the rest of the mold core is avoided, which is convenient for assembly and disassembly

3. The cold material corner of the runner needs to be fully added with an exhaust groove, and the exhaust depth can be appropriately deepened to about 0.03~0.05mm relative to the product part

4. Supplement: exhaust as much as possible where the die surface and inserts can be exhausted, and the cavity gas should be fully drawn out to avoid detours

Plastic injection molding parts factory can be properly making the Air vent for the mold can greatly reduce the injection pressure, injection time, pressure holding time and clamping pressure, making the molding of plastic parts easier than difficult, thereby improving production efficiency, reducing production costs, and reducing machine energy consumption.