注塑模具排氣系統是型腔和澆注系統的排氣，主要包括型腔內的空氣、流道內的空氣以及高溫下塑料中的水蒸氣。這些氣體必須及時排出，以免影響塑件質量……
Injection mold exhaust system is the exhaust of cavity and gating system, mainly including the air in the cavity, the air in the flow channel and the water vapor in the plastic at high temperature. These gases must be discharged in time to avoid affecting the quality of plastic parts
注塑模具中的排氣方式包括：①分型面（包括排氣槽）②嵌件配合面；③推桿或推管與內模嵌件的配合面；④側抽芯機構排氣⑤內加排氣針或插件，排出滯留空氣；⑥透氣鋼制排氣；⑦氣門排氣。
The exhaust modes in the injection mold include: ① parting surface (including exhaust slot) ② insert mating surface; ③ The mating surface between the push rod or push tube and the inner mold insert; ④ Add an exhaust needle or plug-in in the exhaust ⑤ of the side core pulling mechanism to exhaust the trapped air; ⑥ Breathable steel exhaust; ⑦ Exhaust the valve.
根據排氣系統的幾種排氣方式，一般排氣系統的設計原則需要遵循一定的規則：
According to several exhaust modes of the exhaust system, the design principles of the general exhaust system need to follow certain rules:
1、排氣槽只能讓氣體排出。它不能讓塑料熔體流出。
1. The exhaust slot can only let the gas out. It cannot let the plastic melt flow out.
2、不同的塑料因粘度不同，排氣槽的深度也不同。
2. Different plastics have different depths of exhaust slots due to different viscosity.
3、型腔應設計有排氣槽，流道和冷料型腔也應設計有排氣槽，使澆注系統中的氣體盡可能少地進入模腔。
3. The mold cavity shall be designed with exhaust slots, and the flow channel and cold material mold cavity shall also be designed with exhaust slots to make the gas in the gating system enter the mold cavity as little as possible.
4、排氣槽必須通向模架外側，特別是通過鑲件、排氣針或排氣鑲件進行排氣時，一定要注意。
4. The exhaust slot must lead to the outside of the mold base, especially when venting through inserts, exhaust pins or exhaust inserts.
5、排氣槽盡量用銑床加工。加工后用320砂紙打磨去除刀紋。盡量避免在排氣槽上使用研磨機。磨床加工的平面過于光滑，排氣效果往往不好。
5. The exhaust slot shall be processed by milling machine as far as possible. After processing, polish with 320 sandpaper to remove the knife marks. Try to avoid using a grinder on the exhaust slot. The plane processed by the grinder is too smooth, and the exhaust effect is often not good.
6、分型面上的排氣槽應設置在型腔的一側，一般在定模鑲件上。
6. The exhaust slot on the parting surface shall be set on one side of the cavity, generally on the fixed die insert.
7、排氣槽兩側應加工45個倒角。
7. 45 chamfers shall be machined on both sides of the exhaust slot.
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