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Die Casting News

NADCA Video News: Die Casting Defects - Inclusions, Leakers and Cracks

Posted by Hill and Griffith Company on Feb 6, 2019 1:45:04 PM

The material presented in this video are some highlights from the North American Die Casting Association’s online webinar - Die Casting Defects - Inclusions, Leakers and Cracks.

This course discusses various types of inclusions and corrective measures to minimize inclusions. In addition, causes of leakers and corrective measures are presented. Lastly, the various causes of cracks in die castings are discussed.



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Tags: Die Casting, Die Casting Process Improvement, Die Casting Process Evaluation, Die Casting Process, NADCA Video Highlight, Die Casting Surface Defects

NADCA Video News Update: Alloys for High Integrity Die Casting

Posted by Hill and Griffith Company on Jan 24, 2019 5:09:18 PM

The material presented in this video are some highlights from NADCA’s online webinar - High Integrity Die Casting: Alloys for High Integrity Die Casting.

In this webinar all aspects of aluminum high integrity die casting alloys will be covered: from AA numbering, basic metallurgy, the role of alloying each element, impurities and their impact on part quality and properties, ... all the way to different alloy families and existing alloys currently used or under development, with their advantages and disadvantages, current and potential applications as well as achievable properties (using different heat treatments) with each of them.

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Tags: Die Casting, Die Casting Process Improvement, Die Casting Process Evaluation, Die Casting Process, NADCA Video Highlight, Die Casting Surface Defects

NADCA Video News Highlight: Die Casting Defects - Flash, Solder, and Other Defects

Posted by Hill and Griffith Company on Jan 16, 2019 2:17:34 PM

The material presented in this video are some highlights from NADCA’s online webinar

This course is focused on the causes and corrective measures related to a number of defects including: blisters, sinks, solder, flash, erosion, out-gassing, and cold flakes.

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Tags: Die Casting, Die Casting Process Improvement, Die Casting Process Evaluation, Die Casting Process, NADCA Video Highlight, Die Casting Surface Defects

NADCA Video News: Die Casting Defects - Shrinkage Porosity

Posted by Hill and Griffith Company on Jan 9, 2019 4:12:11 PM

Shrink porosity can also be reduced by metal pressure.

"With the high pressure die casting process, we use intensification in all of these processes whether it's called the whole time in zinc, whether it's intensification in aluminum and magnesium, we're using those high pressure features to fill those voids.

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Tags: Die Casting, Die Casting Process Improvement, Die Casting Process Evaluation, Die Casting Process, NADCA Video Highlight, Die Casting Surface Defects

Engineering Die Casting Dies: Dimensional Repeatability - NADCA Video Highlight

Posted by Hill and Griffith Company on Jan 2, 2019 10:09:26 PM

Define what the customer wants and use a standard approach to what the die casting process can achieve.

The material presented in this video are some highlights from NADCA’s online webinar – Engineering Die Casting Dies: Dimensional Repeatability. This looks at defining what the customer wants and gives a standard approach to what the process can normally achieve, with such things as dimensional tolerances and flatness. It covers defining what your plant can achieve on a day-by-day basis using a small amount of math.

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Tags: Die Casting, Die Casting Process Improvement, Die Casting Process Evaluation, Die Casting Process Modeling, Die Casting Process, NADCA Video Highlight, Die Casting Surface Defects

Die Casting Surface Defects Caused by Die Temperature

Posted by Hill and Griffith Company on Dec 28, 2018 5:16:08 PM

NADCA EC-515 Die Casting Defects Course Review, Basics for controlling die casting defects - By Dr. Steve Midson

The die temperature’s effect on surface defects and the die temperature operating window will be discussed next

  • A low die temperature affects surface defects by cooling the fluid metal stream and increasing the percent of solidified metal in the metal stream
  • If the percent of solidified metal is high, then it becomes stiff and solid and does not knit together well; And the flow forms "wrinkles", or cold flow
  • A cold die can be compensated for by having a shorter fill time - this means a higher plunger speed
  • In other words, we can exchange plunger speed for die temperature.
  • Measuring die temperature should be done on every job - most don’t do it enough, but it is required to really minimize surface defects
  • In general, measuring can be done three ways: – Hand held probe – Thermocouple in the die – Infra red device
  • Each has advantages and disadvantages: Hand held probe: accurate, but must stop the machine; Thermocouple in die: continuous, but does not measure surface temperature; Infra red: easy, but not as accurate
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Tags: Die Casting, Die Casting Process Improvement, Die Casting Process Evaluation, Die Casting Process Modeling, Die Casting Process, Die Casting Surface Defects

 


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