An Engineering Approach to Mold-Cooling Circuit Design
The Energy Density vs. ΔT/in. relationship is an important step forward in pursuit of a science-based approach to cooling-circuit design. Here’s why.
An Inside Look at Turbulent Flow
Years of talk about observing and studying coolant flow in a clear simulated cooling channel finally becomes a reality. Here's how it all came together, and what it all means.
Avoid Scale Buildup: The Silent Enemy of Cooling Performance
Obstructions in cooling can wreak havoc on molding. We recount our experience and offer tips on how you can keep things flowing.
Improve the Cooling Performance of Your Molds
Need to figure out your mold-cooling energy requirements for the various polymers you run? What about sizing cooling circuits so they provide adequate cooling capacity?
Balancing the Heat Budget in Injection Molds
Basic formulas for how much heat you must pull out of the mold to achieve a set cycle time.
Make Water Treatment Part of Your Process Cooling Program
Dirty, rusty, smelly water can wreak havoc with even the most meticulous process-cooling program.
Leverage Your Cooling Power
Injection molding is fundamentally a process that involves moving heat energy from place to place. Calculate heat transfer to maximize your cooling capacity.
Measuring the Magic of Turbulent-Flow Mold Cooling
Why is turbulence so important to mold cooling? Link to Phil Burger's research article.
Factors that can inhibit good cooling and thoughts on how you can improve results.
Practical Mold Cooling
Cooling conditions affect cycle time, part dimensions, surface finish,and warpage. Here are some ideas for fine-tuning your mold cooling system.
Scientific Cooling Calculator
Find your required cooling water flow rate and circuit length by entering injection molding variables such as Polymer, Cycle Time, Shot Weight, Molding Room Temperature, etc. User guidelines in the calculator provide definitions and additional details.
Turbulent Flow Calculator
Turbulent water flow is much more efficient at removing heat than laminar flow. A Reynolds Number between 4000 and 8000 is generally considered to be the target value for optimum process cooling.
The Value Curve
Discover the relationship of steel temperature and cooling water flow rate using this simple graph.
Heat Transfer Example - Insulator Boards
This page is designed to show the calculation steps to figure heat transfer from an injection mold through the clamp plate and into the platen.
Hydraulic Diameter Calculator
Using your input, this page calculates the Hydraulic Diameter of cooling passages that are round, annular, rectangular and round with a baffle. Hydraulic Diameter is used to calculate Turbulent Flow.
Find a Water Treatment Professional Near You
Visit the web site for Association of Water Technologies www.awt.org
Quick Mold Change Guide
Three ways to implement SMED (Single Minute Exchange of Die) in Injection Molding Operations.
Turbulent Flow Reference Chart
Minimum flow rates for maximum cooling
Expected Rate of Flow
"Rule of thumb" flow per line size chart
Causes and prevention guide