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Injection Know How
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Packing Pressure and Time vs. Holding Pressure and Time: Are We Using the Right Terms?
Understanding the difference between packing pressure and holding pressure in injection molding is important because they serve different purposes.
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Is Faster Always Better When it Comes to Injection Molding Fill Times?
Even a slow fill time — relative to injection speed settings — can be optimal if it means high-quality parts can be produced consistently.
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Non-Return Valve Repeatability: Worn Components or Faulty Process Parameters
Conduct shot-mass repeatability studies to assess non-return valve performance and avoid unnecessary valve replacements and downtime.
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Understanding Postmold Shrinkage — Why Part Dimensions Change Over Time — Part 2
Molded-in stresses are often not visible during inspection but can reveal themselves in the field. What role does glass transition play?
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How Small and Midsized Injection Molders Can Increase Efficiency and Protect Margins
Injection molding profitability won’t be determined by who owns the newest equipment, but by who executes fundamentals with discipline — standardized startups, visible downtime and root‑cause process control.
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Using Simulation To Anticipate, Correct Core Deflection in Injection Molding
Miniaturized components require deep, narrow cavities formed by thin cores. Use simulation to predict/prevent core deflection by optimizing gate location and anticipating potential wear and failure for components.
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Moving Beyond the Relative Viscosity Curve — Determining Optimum Plastic Flow Rates: Part 3
Molders can use data to determine optimum flow rates by combining cavity imbalance studies with an understanding of machine velocity capabilities.
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Consistent Parts Require Consistent Cooling
Cooling issues are common. Fixing them doesn't cost much, but ignoring them can drain profits and productivity. Learn how to optimize cooling consistently.
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Bringing Order to the Chaotic Debate of Turbulent Flow in Injection Molding
Is turbulent flow required for all cooling channels to optimize the cooling process in injection molding? It depends. Author reviews the Reynolds number, advanced cooling technologies, simulation’s potential role and more.
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Moving Beyond the Relative Viscosity Curve — New Method To Find Optimum Plastic Flow Rates: Part 2
Explore the use of the injection unit velocity capability, which determines a machine’s injection speed linearity to find optimum flow rates, and proposes a second method.
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Through Thick and Thin: Reflecting on Injection Molding Thin and Thick Walls
Author considers time molding thin-wall food packaging and thicker-walled interior automotive trim, weighing the differences and similarities in process, molds and materials.
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Understanding Postmold Shrinkage — Why Do Part Dimensions Change Over Time? — Part 1
What role does the glass transition temperature (Tg) of a polymer play in whether a molded part will continue to shrink after it’s molded?
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