2. The exhaust system on the canals
a) Pros:
- Ease of processing and sanitation.
- Can be arranged at any position on the parting surface.
B) Disadvantages
- Must designed exhaust groove stars for the air to escape, but the plastic does not flow out of the cavity.
- Depending on the speed and flow rate when the exhaust system layout.
- no layout exhaust system too thin on details, there ribbed (rib), groove penguin (blind holes).
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