Moulding sand moisturising system Type LC - Michenfelder
Moulding sand moisturising system Type LC - Michenfelder
Moulding sand moisturising system Type LC - Michenfelder
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<strong>Moulding</strong> <strong>sand</strong> <strong>moisturising</strong> <strong>system</strong> <strong>Type</strong> <strong>LC</strong><br />
Solution for moisture measurement and control in accordance with the common principle of<br />
measurement on conveyor belts and in balances<br />
MICHENFELDER ELEKTROTECHNIK<br />
An der Fahrt 4, 55124 Mainz/Germany<br />
www.michenfelder.com<br />
info@michenfelder.com<br />
TEL.: +49-(0)6131-91017-0 / FAX: -17
We can facilitate a price comparison<br />
To allow you to make a fair comparison, we have decided to expand our product range to include<br />
the low-cost moulding <strong>sand</strong> <strong>moisturising</strong> <strong>system</strong> <strong>LC</strong>. It is the alternative to competitors’ <strong>system</strong>s<br />
available in the market. The moisture probe is installed on the belt upstream of or in the used <strong>sand</strong><br />
weighing device. This facilitates a true price comparison.<br />
Scope of delivery<br />
The <strong>LC</strong> <strong>system</strong> consists of a self-cleaning NF-SR moisture probe. The measurement generator and<br />
the processing unit are located in the separate steel-plate housing. The moisture values measured<br />
in Volt and the evaluated material temperature in oC are transmitted to the processing unit for<br />
conversion to a percentage moisture value. Forty years of experience at <strong>Michenfelder</strong> have gone<br />
into this data conversion process. The <strong>system</strong> has been designed for installation and<br />
commissioning by the customer. To facilitate this, we supply a CD ROM with commissioning report,<br />
program flow visualisation and instructions for the adjustment of the characteristic curve using the<br />
customer’s PC or laptop.<br />
Operating principle<br />
When commissioning is complete (when the calibration value curve has been drawn up), the NF-<br />
SR probe measures the initial material moisture. The integrated processing unit then calculates the<br />
volume of residual water to be added depending on the batch size. At the same time as the used<br />
<strong>sand</strong> flows into the mixer (filling process), the calculated water volume is automatically metered out<br />
to the required final moisture level that was preset.<br />
The principle of measuring moisture upstream of the mixer<br />
With regard to hardware technology and the measuring point upstream of the mixer, the <strong>LC</strong> <strong>system</strong><br />
provides you with the same kind of solution as that offered by the competitors. If you are about to<br />
make this investment decision, you must remember that when measuring material on the belt or in<br />
the used <strong>sand</strong> bunker, in principle, only part of the volume of material in a full mixer batch can be<br />
recorded. This means that the accuracy of the initial moisture with reference to the entire batch is<br />
only an average max. of ± 0.2% H2O (in the 1st standard deviation). Depending on the clay<br />
content, this can result in variations of up to ± 5-10% in compactability at the moulding machine<br />
directly. This is common to all <strong>system</strong>s that measure moisture upstream of the mixer.<br />
Who is the <strong>LC</strong> <strong>system</strong> designed for?<br />
There are customers who, for financial or other reasons, cannot or do not wish to exploit the full<br />
potential for reducing the moulding <strong>sand</strong> related scrappage in their production <strong>system</strong> by improving<br />
moulding <strong>sand</strong> quality. In cases such as this, customers are chiefly concerned with improving <strong>sand</strong><br />
preparation processes in the areas of mixing, moulding and casting generally. Therefore, if the<br />
primary motivation is to avoid “extreme outliers” in the area of moulding <strong>sand</strong> moisture that can<br />
frequently result in production stoppages, then the installation of the low-cost moulding <strong>sand</strong><br />
<strong>moisturising</strong> <strong>system</strong> is a suitable alternative.<br />
Given the growing requirements in modern foundries, investments must be quickly<br />
amortised, i.e. they must pay for themselves. This is best achieved by fully exploiting all the<br />
optimisation potential provided by measurement and control technology in order to reduce<br />
scrappage in a <strong>sand</strong> preparation plant. For this, we recommend <strong>Michenfelder</strong>’s modular<br />
<strong>Moulding</strong> Sand Management System FoMaSys.