John Bozzelli

John Bozzelli Founder

Home In on These Six Variables to Monitor Molding

There are hundreds of variables in molding, but focusing on these six will help you make consistent parts.  

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best practices

Improve Production Rates Via Screw Design — Barrier vs. General Purpose vs. Melt Uniformity

I’m looking for a few good molders to help trial a new screw design, and share data and results for a future article to prove the benefits of a melt uniformity screw.

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The Importance of Hot Nozzle-Tip Mating Against a Cold Sprue Bushing

Done improperly, the result is a cold slug in the nozzle/sprue and a production stop. But there is a better way.

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Time to Swap Out Those General-Purpose Injection Nozzle Tips

Still the standard in the industry, GP nozzle tips can cause a myriad of problems for molders. There are alternatives out there that should be examined.

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Know-How

21 Tips to Slash Energy Costs in Molding

This checklist can provide injection molders a good starting point on the path to reduced energy consumption and can generate some money savings on that journey.  

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Tooling Know-How

What’s Controlling Your Cycle Time? Part 2

Follow these mold-cooling guidelines to maximize your profits.

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What’s Controlling Your Cycle Time? Part 1

Follow these guidelines to maximize your profits.

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How Does Your Molding Machine Control Pack Pressure?

It seems some new machines have pack velocity issues, as machine builders are confusing processors with controllers that are more complicated than they need to be and less user-friendly.

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Improve Quality & Productivity With Advanced Screw Design

Most molders are still running with screw designs that haven’t changed much in 30 years. But they don’t need to.  

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Injection Molding: Understand the Link Between Feed Throat Temperature & Bridging

Save time and money by properly controlling the feed-throat temperature. In some cases—but not all—it can help you solve a bridging problem.

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How to Know When Your Process is Ready to Make Acceptable Parts

Focus on six key metrics to help you determine when a process is lined out and stable enough to start production. 

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Use This Check List to Get Your Machine Properly Installed

Whether you bought a new machine or one that’s been refurbished, you need to prepare for installation so that it can be executed as seamlessly as feasible. Here some advice.

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chemical foaming agents for molding and extrusion
Glycon's DM2: The High Performance Feedscrew
Purgex: Made in the USA. Trusted Globally.
New 2024 Twin Screw Report
Gardner Business Media, Inc.
large tonnage injection molding productivity
Repair and Rectify
Best of the Best
Chemical Foaming Agents for extrusion and molding