What is Hot Runner Injection Molding?

Hot runner injection molding is a specialized manufacturing process that uses a heated runner system to deliver molten plastic directly into the mold cavities. Hot runner systems keep the plastic in a molten state, reducing material waste and improving cycle times. This process enables more efficient, consistent, and high-quality production—particularly valuable for complex, multi-cavity molds and high-volume manufacturing.

Hot runner injection molding is widely used across industries such as automotive, electronics, medical devices, and consumer goods for its ability to produce precise and repeatable plastic parts with minimal waste and downtime.

What Are The Benefits of Hot Runner Injection Molding?

What Are The Benefits of Hot Runner Injection Molding?

Hot Runner systems are usually used for production with high volume, and also with multi-cavity molds. This is so because many benefits are realized when using hot runner molds. Listed below are just some of them:

  • Clamping Pressure can be lower
  • Cooling time is faster
  • Cycle time is faster
  • Energy consumption lowered
  • Injection gates are in better locations
  • Injection Pressure can be lower
  • Injection process is cleaner
  • Labor costs for removing the part from the mold and separating runner scrap from the part are eliminated
  • Output increased
  • Overall profitability increased
  • Possibility of contamination is lessened with no runners
  • Possibility of producing the parts using smaller injection machines
  • Problems on nozzle freeze or sprue sticking are eliminated
  • Production costs are reduced
  • Production steps are shortened
  • Quality of the plastic part is better
  • Regrinding is eliminated
  • Resin costs are lowered
  • Runner scrap eliminated or reduced

Expert Hot Runner Injection Molding Services by Richfields

When you are ready to use a hot runner mold, feel free to Contact Us. Based on experience, our customers would sometimes require a specific brand of hot runner system. We are flexible in this regard and can accommodate the brand of hot runner that will be specified by our customer. Some brands of hot runners that we are familiar with include DME, Husky, Mold Masters, Synventive, and Yudo. Our team is experienced in integrating and maintaining these systems to ensure optimal performance and compatibility with your tooling and production requirements.

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