Hot Runners for Plastics Production
A hot runner system is an assembly of heated components—hot halves, nozzles and gates and—that inject plastic into the cavities of an injection mold. The system usually includes a heated manifold and a number of heated nozzles.
ESSENTIAL READING
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Optimizing Pack & Hold Times for Hot-Runner & Valve-Gated Molds
Using scientific procedures will help you put an end to all that time-consuming trial and error. Part 1 of 2.
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How to Start a Hot-Runner Mold That Has No Tip Insulators
Here's a method to assist with efficient dark-to-light color changes on hot-runner systems that are hot-tipped.
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Hot Runners: How to Maintain Heaters, Thermocouples, and Controls
I conclude this three-part examination of real-world problems and solutions involving hot runners by focusing on heaters, thermocouples, and controls. Part 3 of 3.
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Hot Runners: Truths. Myths, Overlooked Areas: Part 2
Here’s a view from the trenches of a tooling manager who, over 30 years, has experienced the joys and pains of using virtually every type of hot runner on the market. Part 2.
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How to Optimize Pack & Hold Times for Hot-Runner & Valve-Gated Molds
Applying a scientific method to what is typically a trial-and-error process. Part 2 of 2.
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Hot Runners: A View from the Bottom Up
Addressing hot-runner benefits, improvements, and everyday issues from the perspective of decades of experience with probably every brand on the market. Part 1 of 2.
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Latest Hot Runners News And Updates
PET Preform Hot Runner System Reduces Stack Height
Mold-Masters has cut the stack height of its PET-Series hot runner system from 300 mm to 260 mm, while maintaining a 3-plate design and the advantages therein.
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New Hot Runner Temperature Control
Oerlikon HRSflow’s T-Flow HRS control has launched with three models that are configurable to multiples of six zones.
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3D Printed Hot Runner Nozzles, Pressure Pads Provide Reliable Temperature Handling
NPE2024: Witosa GmbH, through its distributor DMS, brings the Monolith hot runner nozzle and hardened steel Energy Blocker to the U.S., enabling the reduction in time, costs and improvements in product quality.
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Plug-and-Play Modular Hot Runner Controller
NPE2024: Spark Industries’ patent-pending MOD24 hot runner controller offers unlimited plug-and-play of 6-zone hot runner control modules.
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Movable Tempering Stamp Can Eliminate Surface Defects
NPE2024: Incoe says Heat-Inject Technology introduces localized heat to remove weld or knit lines, or help melt flow into hinges, thin walls, delicate geometries or microstructures.
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Hot Runner Temperature and Mold Motion Controllers Debut
NPE2024: Hot runner systems, temperature and motion controllers, an auxiliary injection unit and a gate seal are among Mold-Masters’ show features.
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Hasco Marks a Century in Mold Components, Mold Bases and Hot Runners with Cake and New Technologies
NPE2024: Cake, drinks and the unveiling of a new North American website providing online ordering in the U.S. and Canada for the first time are just some of the things happening at Hasco’s booth as it brings its year-long centennial celebration to Orlando.
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How to Start a Hot-Runner Mold That Has No Tip Insulators
Here's a method to assist with efficient dark-to-light color changes on hot-runner systems that are hot-tipped.
Read More
Hot Runners: How to Maintain Heaters, Thermocouples, and Controls
I conclude this three-part examination of real-world problems and solutions involving hot runners by focusing on heaters, thermocouples, and controls. Part 3 of 3.
Read More
Hot Runners: Truths. Myths, Overlooked Areas: Part 2
Here’s a view from the trenches of a tooling manager who, over 30 years, has experienced the joys and pains of using virtually every type of hot runner on the market. Part 2.
Read More
How to Optimize Pack & Hold Times for Hot-Runner & Valve-Gated Molds
Applying a scientific method to what is typically a trial-and-error process. Part 2 of 2.
Read More
Hot Runners: A View from the Bottom Up
Addressing hot-runner benefits, improvements, and everyday issues from the perspective of decades of experience with probably every brand on the market. Part 1 of 2.
Read MoreFAQ: Hot Runners
First, think of it as an extension of the molding machine itself. Its purpose is to keep the plastic molten at a proper temperature on its path to the cavity. So basically it’s just a piece of heated steel with a round channel in it for the melt to flow through. Ideally, this channel would be running at the exact temperature on the controller, free of obstacles such as dead spots or components that could create hangups and cause scrap issues with color changes or contamination.