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Die Casting News

NADCA Video Highlight - Why Diecasting Plunger Shot Monitors are Important

Posted by Hill and Griffith Company on Apr 10, 2019 4:40:58 PM

The material presented in this video are some highlights from NADCA’s online webinar - Basic Diecasting Machine Operator Training: Why Shot Monitors are Important

Many die casting process variables affect the final porosity level in a casting. This course will discuss the effect of these different parameters on porosity. It will connect these processing parameters back to the underlying porosity formation mechanisms covered in the first porosity course. Start solving porosity by optimizing your process parameters for reduced porosity. For information on purchasing a downloadable copy of this webinar in its entirety, please visit: http://www.diecasting.org/store/detai...

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Tags: Die Casting, Die Casting Lubricant, Tim Cowell, Die Casting Porosity, Die Casting Gas Porosity, NADCA Video Highlight

NADCA Video Highlight - Control Diecasting Porosity with Processing Parameters

Posted by Hill and Griffith Company on Apr 3, 2019 5:07:54 PM

The material presented in this video are some highlights from NADCA’s online webinar - Porosity Basics: Control Porosity with Processing Parameters

Many die casting process variables affect the final porosity level in a casting. This course will discuss the effect of these different parameters on porosity. It will connect these processing parameters back to the underlying porosity formation mechanisms covered in the first porosity course. Start solving porosity by optimizing your process parameters for reduced porosity. For information on purchasing a downloadable copy of this webinar in its entirety, please visit: http://www.diecasting.org/store/detai...

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Tags: Die Casting, Die Casting Lubricant, Tim Cowell, Die Casting Porosity, Die Casting Gas Porosity, NADCA Video Highlight

NADCA Video Highlight - Basic Diecasting Operator Training

Posted by Hill and Griffith Company on Mar 27, 2019 9:52:04 PM

The material presented in this video are some highlights from NADCA’s online webinar - Basic Operator Training: Recognizing and Controlling Flow Defects.

The operator will learn how to recognize flow (surface) defects and what causes these types of defects. This course will address various operating parameters that impact flow defects, such as die temperature, die spray, cooling line flow rate, fill time and metal temperature. The operator will also learn corrective measures that can be taken to reduce and control flow defects, including preferred operating ranges for the various parameters.

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Tags: Die Casting, Die Casting Lubricant, Tim Cowell, Die Casting Porosity, Die Casting Gas Porosity, NADCA Video Highlight

Part 4/4 - Die Casting Porosity Causes and Solutions

Posted by Hill and Griffith Company on Mar 20, 2019 6:00:52 PM

By Tim Cowell, Hill and Griffith Company, Technical Director

Shrink Porosity (Temperature)

Note that the temperatures that effect the location of shrink die casting porosity are inside the casting itself. The die temperatures will influence the internal casting temperature, but they are not always effective in controlling it completely. Shrink porosity in a heavy section will be harder to move, shrink porosity in a thin section will be relatively easy to move. Complex shapes may respond different than you think.

Since the location of shrink porosity is also the hottest spot in that section of the casting, it is usually in the center of a heavy section. This hot spot location can be controlled to some extent by die temperature. The hot spot can often be moved by changing the die temperature - but this doesn’t reduce the porosity much - it just moves it.

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Tags: Die Casting, Die Casting Lubricant, Tim Cowell, Die Casting Porosity, Die Casting Gas Porosity

"Reducing Porosity in High Pressure Zinc Die Casting," Guest Post by Bruschi, Abbiategrasso, Italy

Posted by Hill and Griffith Company on Sep 26, 2018 1:53:42 PM

High pressure zinc die casting is the process of forcing molten zinc based alloy under high pressure into a mould cavity. This delicate process can be influenced by a series of factors like the mould geometry, the composition of the alloy and the injection process that forces the molten metal into the mould.

In this Bruschi blog post, we'll dive into the most common defects that can appear in high pressure zinc die casting and a possible way to avoid them.

• Gas porosity
• Shrinkage porosity
• Leaks
• Possible solutions

Porosity influences the quality of final product in terms of tightness and strength. The most common porosity types are gas porosity, shrinkage porosity and leaks.

(Image from a North American Die Casting Association promotion for an educational webinar.)

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Tags: Die Casting, Die Casting Lubricant Computer Simulation, Die Casting Gas Porosity, Die Casting Process Control Theory

The State of the Die Casting Industry, Part 2 of 3

Posted by Hill and Griffith Company on Aug 17, 2018 9:38:14 AM

North American Die Casting Association's President Steve Udvardy, reviews the Trump Administration, Macro Economics and Die Casting Markets in this three part series.

Good day everyone, and welcome to the latest update of the North American Die Casting Industry State of the Industry. I'm Steve Udvardy, and pleased to have the opportunity to speak to you today.

Macro Economics

Okay, now let's turn to macro economics and our GDP growth. This chart shows GDP growth by quarter from 2014 through the end of the first quarter of 2018. 2018 initially came in at about 2%. GDP growth was then revised at 2.2%. The projection for the second quarter, although the numbers are not in yet, is 2.5%. Is that good? Is that bad? Well, one, it's positive. It's a positive number, but if we go back to the most recent recession period, when were coming out of 2009, our GDP growth was hanging around 2-3%. That's what had taken us a substantial amount of time to dig ourselves out of the hole that was dug during the most recession period. All of the prior recession periods had recovery rates of GDP growth between 5-6%. Although 2-3 is not bad, it has not been the 5-6% that we had post prior recession periods. Where do we see all of 2018? Wells Fargo, for instance, that manages our investment portfolio, projects about 2.8% for the year. That's as compared to 2.6% for all of 2015, 2.1% 2016, 2.5% 2017, but depending on what source you look at, for all of 2018, the expected GDP growth is going to be somewhere between 2.6-2.9%.

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Tags: Die Casting, Die Casting Gas Porosity, Die Casting State of the Industry Report

The State of the Die Casting Industry, Part 1 of 3

Posted by Hill and Griffith Company on Aug 8, 2018 1:23:48 PM

North American Die Casting Association's President Steve Udvardy, reviews the Trump Administration, Macro Economics and Die Casting Markets in this three part series.

Good day everyone, and welcome to the latest update of the North American Die Casting Industry State of the Industry. I'm Steve Udvardy, and pleased to have the opportunity to speak to you today.

Administration

Today, we're going to cover three topics within this state of the industry report. First, we'll take a look at the administration and whether they're doing any good at this point, getting close to the midterm of the administration. We'll take a look at some macro economics, and then lastly cover specifically die casting markets and shipments.

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Tags: Die Casting, Die Casting Gas Porosity, Die Casting State of the Industry Report

Die Casting Book Review "Gas Porosity, A Guide to Correcting the Problems"

Posted by Hill and Griffith Company on Jul 26, 2018 4:36:31 PM

North American Die Casting Association publication by William Walkington

(We found another die casting education gem available online. This excellent 25 page publication reviews in detail the causes and possible solutions to gas porosity. To illustrate the problem, the image below is linked to a 3D X-Ray video animation done by North Star Imaging.)

Table of Contents:

Identification
Flow Porosity and Gas Porosity
Pressure and Gas Porosity
Sources of Gas
Trapped Air
Venting System and Vacuum System
Runner and Gate Design
Steam and Gas From Vaporized Lubricant
Gas From Hydrogen
Conclusion
Appendix (simulations: www.diecasting.org/publications/516)

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Tags: Die Casting, Die Casting Gas Porosity

"Intro to Causes of Die Casting Porosity" - NADCA Highlight (proper die spray application)

Posted by Hill and Griffith Company on Jul 11, 2018 10:40:09 AM

The material presented in this video are some highlights from NADCA’s online webinar - Porosity Basics: Introduction to the Causes of Porosity.

To successfully manage and reduce porosity, one must first understand what causes porosity. This course will cover the physical causes of porosity. In particular, the sources shrink porosity formation and gas porosity will be explained. The course will conclude with traditional concepts for reducing porosity formation.

For information on purchasing a downloadable copy of this webinar in its entirety, please visit: diecasting.org/store/detail.aspx?id=WEB057

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Tags: Die Casting, Die Casting Gas Porosity

"Manage Your Die Casting's Porosity" - (proper die spray application)

Posted by Hill and Griffith Company on Jul 3, 2018 8:55:02 PM

Join NADCA's Porosity Management Webinar Series

From the North American Die Casting Association (NADCA) web page.

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Tags: Die Casting, Die Casting Gas Porosity

 


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