注塑模的排气系统是由模腔和注塑体系的废气组成，它的组成成分是：模腔内的气流、通道内的气流、温度较高的塑料中的湿气。

济南注塑模具的放气模式有：

①分模面（含开式通风孔）
Parting surface (including open vent)

②镶嵌表面；
② Mosaic surface;

③推杆或推管与内模具嵌件之间的接触面；
(3) the contact surface between the push rod or push tube and the internal mold insert;

④侧向抽心装置的排气；
(4) lateral core pumping device exhaust;

⑤在困气点增加一根排气管或插头；
⑤ Add a exhaust pipe or plug at the trapped gas point;

⑥通风的钢质废气；
⑥ Ventilated steel exhaust gas;

⑦阀门的排放。
⑦ Valve discharge.

1.排气口仅允许气体排放，不允许塑胶溶解物外泄。
1. The exhaust port only allows gas discharge, not plastic dissolute leakage.

2.由于不同的塑料，其排气孔的深度会因其粘性而变化。
2. Due to different plastics, the depth of the vent will vary due to its viscosity.

3.在型腔中应设置排气孔，在流道、冷液室中也应设置排气孔，以减少在浇铸体系中的气体流入模腔。

3. Exhaust holes should be set in the cavity, and exhaust holes should also be set in the flow passage and cold liquid chamber to reduce the gas inflow into the mold cavity in the casting system.

4.排气口必须与模具框架相连通，特别是在经过插头、排气插头或排气插头时，必须要小心。
4. The exhaust port must be connected to the mold frame, especially when passing a plug, exhaust plug or exhaust plug, care must be taken.

5.尽可能采用铣床，处理后用320号砂纸进行打磨，以刃痕，尽可能不要用研磨机来处理，研磨机的表面太平坦、太平滑。
5. Use milling machine as far as possible, grind with no.320 sandpaper after treatment to eliminate edge marks, do not use grinding machine as far as possible, the surface of grinding machine is too flat, too smooth.

6.在分型面上，通常在固定模嵌件上，应在型腔的一边。

6. On the parting surface, usually on the fixed die insert, should be on the side of the cavity.

7.在通风管道的两边都要进行45度的切削。
7. 45 degree cutting should be made on both sides of the ventilation duct.