注塑模具排气系统是型腔和浇注系统的排气，主要包括型腔内的空气、流道内的空气以及高温下塑料中的水蒸气。这些气体必须及时排出，以免影响塑件质量……

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

注塑模具中的排气方式包括：①分型面（包括排气槽）②嵌件配合面；③推杆或推管与内模嵌件的配合面；④侧抽芯机构排气⑤内加排气针或插件，排出滞留空气；⑥透气钢制排气；⑦气门排气。

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.

根据排气系统的几种排气方式，一般排气系统的设计原则需要遵循一定的规则：

According to several exhaust modes of the exhaust system, the design principles of the general exhaust system need to follow certain rules:

1、排气槽只能让气体排出。它不能让塑料熔体流出。

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，排气槽的深度也不同。

2. Different plastics have different depths of exhaust slots due to different viscosity.

3、型腔应设计有排气槽，流道和冷料型腔也应设计有排气槽，使浇注系统中的气体尽可能少地进入模腔。

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、排气槽必须通向模架外侧，特别是通过镶件、排气针或排气镶件进行排气时，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、排气槽尽量用铣床加工。加工后用320砂纸打磨去除刀纹。尽量避免在排气槽上使用研磨机。磨床加工的平面过于光滑，排气效果往往不好。

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、分型面上的排气槽应设置在型腔的一侧，一般在定模镶件上。

6. The exhaust slot on the parting surface shall be set on one side of the cavity, generally on the fixed die insert.

7、排气槽两侧应加工45个倒角。

7. 45 chamfers shall be machined on both sides of the exhaust slot.

济南注塑模具的排气系统能有效提高生产产品合格率，提高生产效益，降低生产成本，提高机器的生产性能。更多相关内容就来网站www.sdlqmj.com关注我们资讯吧！

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