Below are examples of gates in actual molded samples.
Note: there is another way to sort out hot runner system: HOT TIP and SPRUE GATING.
Pictures of hot runner system
Below are pictures of hot runner system provided by Chinese hot runner brand, Baozee.
Pros and cons of hot runner system
Save materials, as there are no runners, so as plastic waste. Perfect for high cost materials such as LCP, PEEK.Competitive unit part price.Ideal for large size of parts, like automotive components.Ideal for multi-cavity molds, such as razor handles, plastic caps for bottles or sprayers.
Higher mold cost compared to cold runners, so does the maintenance cost.High requirement on mold design, especially in filling balanceNot easy to change colorsMay not suitable for all resins, especially for those are heat sensitive
Below are a couple of popular brands on the market. For molds to be remained at Plastopia, we would use Chinese local brand to save tooling cost for our customers.
Mold flow for hot runners
For complicated part, we would proceed a mold flow analysis report. Download a sample report.
