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CPT International 04/2016

The leading technical journal for the global foundry industry – Das führende Fachmagazin für die weltweite Gießerei-Industrie

The leading technical journal for the
global foundry industry – Das führende Fachmagazin für die
weltweite Gießerei-Industrie

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Country<br />

Casting production in Number of foundries<br />

million tons<br />

China 44.5 30 000<br />

U.S. 12.25 2001<br />

India 9.81 4600<br />

Japan 5.54 2085<br />

Germany 5.18 599<br />

Russia 4.1 1200<br />

Brazil 3.07 1352<br />

Korea 2.56 910<br />

Table 2: Top 10 countries in casting production (Source: 48th Census of World<br />

Casting Production)<br />

Germany<br />

USA<br />

Position among the top ten 5 2<br />

Produktivity very high high<br />

Labour market Need for more specialists Need for more specialists<br />

Energy costs high low<br />

Capacity utilization fully occupied capacity utilization of 75-80 %<br />

Table 3: Germany and the USA in comparison<br />

ber of individuals familiar with both<br />

markets, all stated that innovation is<br />

what drives productivity in Germany.<br />

Their view, shared by many, is German<br />

foundries employ more advanced use<br />

of technology and automation; German<br />

foundries tend to be more modern,<br />

better capitalized, well-maintained<br />

and well-managed. Their senior<br />

management and leadership staffs<br />

have more engineering backgrounds<br />

versus the predominant production<br />

& financial backgrounds found in U.S.<br />

foundries.<br />

Additional qualitative differences include<br />

more focus on process and metallurgical<br />

control during manufacturing<br />

and less on inspection and quality<br />

control after casting. The low energy<br />

costs of the United States should not<br />

be ignored. It is a key advantage U.S.<br />

foundries have over their EU counterparts.<br />

In fact, according to author Peter<br />

Zeihan, the United States is looking at<br />

decades of low natural gas prices, primarily<br />

due to the shale gas boom, horizontal<br />

drilling and hydraulic fracturing<br />

techniques [7]. He goes on to state<br />

that since 2008, U.S. average electricity<br />

prices are now the cheapest in the<br />

world. Quite an advantage for an energy<br />

intensive industry such as metalcasting.<br />

Molding material differences<br />

Let’s take a closer look at differences<br />

between the EU and U.S. in molding<br />

materials usage and choices and how<br />

regulations drive those material choices.<br />

We will examine differences in several<br />

areas:<br />

» Differences between EU and U.S.<br />

foundries from a product technology<br />

perspective<br />

» Differences between product development<br />

strategies of major suppliers<br />

» Differences between EU and U.S.<br />

foundries from environmental regulations<br />

Figure 1 compares foundry binder usage<br />

[8] in the EU and the US. There are<br />

two key differences. First, is the greater<br />

use of the Furan No-Bake (FNB) process<br />

(shown here as Acid Cured binders,<br />

which includes a small amount<br />

of Phenolic No-Bake) in the EU, especially<br />

in Germany. Over twice as much<br />

FNB is used in the EU (44 %) as in the<br />

US (19 %). On the other hand, the use<br />

of Phenolic Urethane No-Bake predominates<br />

in the United States (nearly<br />

25 % in the US vs. only 3 % in EU—<br />

over 8 times as much!). In fact, there<br />

is virtually no PUNB used in Germany.<br />

Why the difference? One reason is<br />

historical. Furan No-Bake binders were<br />

developed in the late 1950s ten years<br />

earlier than Phenolic Urethane binders.<br />

FNBs depend upon a key raw material,<br />

furfuryl alcohol that is derived<br />

from agricultural by-products such<br />

as corn cobs and sugar cane bagasse.<br />

Periodic shortages of these materials<br />

due to fluctuations in crop harvests<br />

can reduce supply and drive up prices.<br />

In response to these unpredictable<br />

variations, phenolic urethanes were<br />

developed in the United States by the<br />

Foundry Division of Ashland Chemical<br />

in the late 1960s and introduced<br />

to the foundry market in the U.S. in<br />

the early 1970s (in the case of Phenolic<br />

Urethane Cold-Box as a response to<br />

high natural gas prices due to the first<br />

oil embargo). U.S. foundries had the<br />

initial access to this technology earlier<br />

than those in the EU, and converted<br />

to the new technology. The conclusion<br />

is material choices tend to be regional<br />

versus a single global market driver.<br />

Today, there is overwhelming use of<br />

Furan No-Bake binders (FNB) as the<br />

system of choice for EU steel foundries.<br />

This contrasts quite differently from<br />

the U.S. where Phenolic Urethane No-<br />

Bake binders (PUNB) are the predominant<br />

choice for steel foundries [9].<br />

Product solutions tend to be more<br />

company specific than regional. That<br />

is, one company’s solution to continuous<br />

product improvement and to meet<br />

environmental regulations may not be<br />

the same as the next.<br />

For example, for nearly fifteen years,<br />

Hüttenes-Albertus, Düsseldorf, Germany,<br />

has used tetraethyl silicate (TEOS)<br />

a hybrid inorganic/organic material,<br />

to reduce emissions, smoke & odor in<br />

urethane cold-box (PUCB) systems. For<br />

the past three years, HA <strong>International</strong><br />

has used this same technology in urethane<br />

no-bake (PUNB). Other suppliers<br />

have chosen a different route using<br />

conventional aromatic solvents with<br />

improved environmental characteristics<br />

to achieve similar results.<br />

While beyond the scope of this document<br />

to analyze which approach is<br />

Casting Plant & Technology 4/<strong>2016</strong> 39

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