{"id":12629,"date":"2026-05-13T05:28:59","date_gmt":"2026-05-13T05:28:59","guid":{"rendered":"https:\/\/ideal-pro.com\/?p=12629"},"modified":"2026-05-13T06:13:49","modified_gmt":"2026-05-13T06:13:49","slug":"the-advantages-of-using-small-gates-in-injection-molding-a-complete-guide","status":"publish","type":"post","link":"https:\/\/ideal-pro.com\/ko\/the-advantages-of-using-small-gates-in-injection-molding-a-complete-guide\/","title":{"rendered":"The Advantages of Using Small Gates in Injection Molding: A Complete Guide"},"content":{"rendered":"

\uadf8\ub9ac\uace0 gate<\/strong> is a critical section of the runner system in \uc0ac\ucd9c \uc131\ud615<\/a>. With the exception of direct sprue gates, most gates represent the smallest cross-sectional area in the entire system—typically only 3% to 9%<\/strong> of the runner's cross-section.<\/p>\n

\"<\/p>\n

While a large gate might seem beneficial for reducing flow resistance, it isn't always the best choice. For the vast majority of plastic melts (which are non-Newtonian fluids), reducing the gate size<\/strong> can actually improve molding quality.<\/p>\n

Why? Because a smaller gate increases the shear rate. This generates shear heat<\/strong>, which significantly lowers the apparent viscosity of the melt, making it flow better. Any pressure drop caused by the smaller gate can usually be compensated for by adjusting the injection pressure.<\/p>\n

Here are the 5 key advantages<\/strong> of using small gates in injection molding.<\/p>\n

\n

💡 Pro Tip:<\/strong> Small gates are particularly beneficial for thin-walled parts, parts with fine details, and plastics sensitive to shear rates like Polyethylene (PE), Polypropylene (PP), and Polystyrene (PS).<\/p>\n<\/blockquote>\n

\n

Improved Fluidity via Shear Heating<\/h2>\n

Small gates create a significant pressure difference between the front and back ends. This effectively increases the shear rate<\/strong> of the melt and generates substantial shear heat.<\/p>\n