1. The exhaust slot can only let the gas out. Do not allow the plastic melt to flow out.
2. Different plastics have different depths of exhaust grooves due to their different viscosities.
3. The cavity should be designed with an exhaust groove runner and a cold material cavity, and an exhaust groove should also be designed, so that the gas in the pouring system can enter the mold cavity as little as possible.
4. The exhaust groove must be passed to the outside of the mold frame, especially when exhausting through the exhaust pin of the insert or the exhaust insert, be sure to pay attention.
5. The exhaust groove should be processed with a milling machine as much as possible. After processing, it should be polished with No. 320 sandpaper to remove the knife pattern. The exhaust groove should be processed by a grinder as far as possible. The plane processed by the grinder is too smooth and the exhaust gas effect is often not good.
6. The exhaust groove on the parting surface should be set on one side of the cavity, generally on the fixed die insert.
7. Both sides of the exhaust groove should be processed with a 45-degree chamfer.