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Die Casting News

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

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

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

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, Die Casting Process Modeling, Die Casting Process Evaluation, Die Casting Process Improvement, Die Casting Surface Defects

Happy Holidays

Posted by Hill and Griffith Company on Dec 19, 2018 2:24:20 PM

Season's Greetings from our family to yours.  

Hill and Griffith's Management & Sales Team 

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Tags: Die Casting, Die Casting Process, Die Casting Process Modeling, Die Casting Process Evaluation, Die Casting Process Improvement, NADCA Video Highlight, Happy Holidays

NADCA Video News Update, "Thermal Design - Why Bother?"

Posted by Hill and Griffith Company on Dec 12, 2018 11:21:26 AM

Why thermal design is important.

 

The material presented in this video are some highlights from NADCA’s online webinar - Engineering Dies: Thermal Design - Why Bother. This covers WHY the thermal design is important. It introduces the simple, but important variables such as surface area and the amount of heat that needs to be controlled. It has been clearly shown that using excess die spray to control die temperature usually results in lower die life, higher variation in quality day-to-day and increases gas porosity. Thermal design is important but can be simple.

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

Die Temperature And Surface Die Casting Defects

Posted by Hill and Griffith Company on Dec 5, 2018 3:41:43 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.
Read More

Tags: Die Casting, Metal Casting, Aluminum Die Casting Process, Die Casting Release Agent, Die Casting Defects

High Integrity Die Casting: Melting, Melt Treatment, and Transfer - NADCA Video Highlight

Posted by Hill and Griffith Company on Nov 28, 2018 11:12:43 AM

Highlights from NADCA’s online webinar

High Integrity Die Casting Melting, Melt Treatment, and Transfer

The material presented in this video are some highlights from NADCA’s online webinar - High Integrity Die Casting: Melting, Melt Treatment, and Transfer for High Integrity Die Casting. In this webinar best practices of melting, melt treatment and transfer for aluminum high integrity die casting of structural components will be presented and discussed. Many oxide and other inclusions originate from inappropriate practices with the liquid aluminum before it is cast. They cause quality issues / high scrap rates and reduced properties. This webinar explains how to avoid them by using best practices like filtering, degassing, fluxing, skimming, settling, quiescent transfer, etc.

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

Engineering Die Casting Dies: Dimensional Repeatability - NADCA Video Highlight

Posted by Hill and Griffith Company on Nov 21, 2018 2:07:34 PM

Define what the customer wants and have standard approach to what the process can normally 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.

Read More

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

Post Die Casting Operations - Resolving Adhesion Problems

Posted by Hill and Griffith Company on Nov 15, 2018 3:32:25 PM

Introduction

In the Die Casting Industry, many of the castings manufactured undergo secondary operations incorporating the use of paints, adhesives and other polymers such as RTV (Room Temperature Vulcanization).  The application of these types of materials requires the polymer to bond to the metal substrate (surface) of the casting.  When this bond fails, it is considered to be a die casting adhesion problem. For the die caster, this can be a very costly problem; therefore, it is imperative that it be solved quickly.

To gain a better understanding of the problem and its potential solution, the following points will be discussed. 

  1. What creates Adhesion?
  2. What prevents Adhesion?
  3. Assessing the Problem
  4. Solving the Problem
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Tags: Die Casting, Metal Casting, Die Casting Awards, Magnesium Die Casting, Die Casting Adhesion Solutions

 


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