• PT Youtube
  • PT Facebook
  • PT Linkedin
  • PT Twitter

INJECTION MOLDING: Hot-Runner Enhancements Ease Processing & Maintenance

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

New nozzle tip, insulating blocks, and bushing to prevent thread seizing.


Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Related Suppliers

Three new hot-runner components are available from HRSflow of Italy (offices in Byron Center, Mich., and Windsor, Ont.). First is the new Three-Layer Tip, a nozzle tip made of three materials, with no coating. One of the materials is a copper bushing inside the flow channel to improve thermal conductivity. It’s said to provide increased temperature at the gate to improve processing of materials such as glass-filled compounds. The new design is also said to reduce wear of the nozzle tip and eliminate black spots in parts. The new tip is aimed at automotive lighting and other parts with high cosmetic requirements.

Second, the new Pressure Block (yellow components in the photo) is made of materials with low heat conductivity. It is positioned between the hot-runner manifold and the mold to increase clamp-plate stiffness and provide an optimal thermal profile along the whole hot runner. The main feature is its flexible positioning without negatively affecting the thermal profile of the hot-runner system.

Third, the new Thread Safe Kit is said to simplify routine maintenance, especially when processing materials such as PMMA and PC. A special bushing between the nozzle and manifold reportedly eliminates thread seizing, thus allowing for easy nozzle removal without thread damage.


  • K 2013 Preview: Injection Molding

    Next month’s mammoth triennial plastics show in Düsseldorf, Germany, challenges injection molding machine builders to demonstrate technological leadership in addressing the needs of the marketplace.

  • Prevent & Minimize Downtime in Hot Runner Molding

    There are simple explanations for the most common hot-runner problems and equally simple ways to prevent them. One is to take advantage of features often overlooked in today’s hot-runner controls.

  • The New Dimension in Mold Simulation

    Keep an eye on the increasing prominence of so-called “3D” mold analysis. Two vendors of simulation software from Europe and Asia think it’s the best solution for a big proportion of injection molded parts. Established U.S. suppliers aren’t so sure. In any case, the capabilities of both 3D and standard 2.5D simulation are expanding rapidly.

Related Topics