TOOLING KNOW HOW

Why Shoulder Bolts Are Too Important to Ignore (Part 1)

These humble but essential fasteners used in injection molds are known by various names and used for a number of purposes.
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The Impact of Hydraulics on Tool Design, Practical Uses -- Part 2 of 2

The Impact of Hydraulics on Tool Design, Practical Uses -- Part 2 of 2

Here are more tips on using hydraulically actuated devices on your tools.

The Impact of Hydraulics on Tool Design -- Part 1 of 2

Get a better understanding of their use, proper sizing, and how the tool design and setup in the machine can impact failures in manufacturing.
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How to Select the Right Tool Steel for Mold Cavities

With cavity steel or alloy selection there are many variables that can dictate the best option.
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How Do You Estimate Cycle Time?

Molders price jobs based on  estimated press time, and that is where you can either be very profitable or lose your shirt. But there’s a new, free resource to help you out.  

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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How Many Parts Will My Mold Make? Part 1

Follow these guidelines to extend the life of a mold and reduce repair costs.

The Scoop on Screws

The kind used as fasteners in molds, that is. Here are some design considerations to help you choose and use the right ones.

Tunnel Gates for Mold Designers, Part 1

Of all the gate types, tunnel gates are the most misunderstood. Here’s what you need to know to choose the best design for your application.

Cooling Geometry and the Reynolds Calculation

The original Turbulent Flow Rate Calculator worked well with a round circuit diameter, such as a drilled passage, but not as well using hydraulic diameters. Here’s how the problem was fixed.

What You Need to Know About Leader Pins and Bushings

There’s a lot more to these humble but essential mold components than you might suspect. Following the author’s tips could save much time, money and frustration.

What's Controlling Your Cycle Time: Part 3

Follow these guidelines to maximize your profits.

How to Know the True Value of Conformally Cooled Injection Molds

What’s the return on investing in a new mold with conformal cooling to boost productivity? Will it pay for itself? How soon? Here’s a case study on how to answer those questions.

What’s Controlling Your Cycle Time? Part 2

Follow these mold-cooling guidelines to maximize your profits.

What’s Controlling Your Cycle Time? Part 1

Follow these guidelines to maximize your profits.

How to Stop Melt Leakage and Carriage Blow-Back

Follow these tips when you have melt leakage around the machine nozzle and sprue bushing or injection-carriage blow-back.

How to Form a Hole with a Core Pin: Part 2

Prevent wear, flash, and mold damage with these design methods.

How to Form a Hole with a Core Pin: Part 1

Prevent wear, flash, and mold damage with these design tips.

What You Need to Know About Blade Ejectors: Part 3

Follow these guidelines to prevent premature wear, flash and galling. The focus here is on corner radii.
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What You Need to Know About Blade Ejectors: Part 2

Follow these guidelines to prevent premature wear, flash and galling.

What You Need to Know About Blade Ejectors: Part 1

Follow these guidelines to prevent premature wear, flash and galling.

Get Better at Quoting Injection Molded Parts: Part 4 of 4

This fourth and final installment focuses on labor, packaging, secondary operations and various assorted details.

Get Better at Quoting Injection Molded Parts: Part 3

Follow these detailed tips to get the jobs you want. This installment focuses on the mold and the molding machine.