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Automatic milling and pressing system (AMP)

The SIEBTECHNIK TEMA automatic grinding and pressing system combines all processes from pre-grinding of fist-sized sample materials, dividing, ultra-fine grinding and pressing of the powder into a tablet in one device.

The fully automatic grinding and pressing system can be used to convert bulk material samples into test specimens for an XRF or XRD analyzer. It is designed for use in fully automated sample preparation systems.

We can offer you a complete solution here, from the sampling system to the Pneumatic Tube System and automatic sample preparation, which includes all the machines and devices operated.

Fully automatic in 4 steps

 

Dosing unit

The dosing unit takes over the volumetric separation of a partial quantity of the fed bulk sample for the subsequent main grinding and production of the test specimen. The excess material that is not separated from the bulk sample is first used for rinsing grinding.

The integrated grinding aid dosing system can add the required number of grinding aid tablets for rinsing and main grinding to the sample material to be ground, depending on the presetting.

Vibratory disk mill

Crushing & Milling of the bulk sample is carried out using a proven sample preparation technology, the vibratory disk mill. The mill is equipped with a grinding vessel made of tungsten carbide, which has been optimized for use in the AMP. The shell surface of the vessel can be lifted from the base after the set grinding time has elapsed so that the bulk sample can be discharged quickly. The grinding vessel can be blown out via the integrated nozzles after grinding is complete.

Press

The fine material obtained from the main grinding is pressed into a sample ring by means of a hydropneumatic cylinder. The cylinder enables the implementation of the preselected cycle for pressure build-up, holding pressure and decomposition pressure. Once the pressing process is complete, the test specimen is fed to a test device. Here, the pressed tablet is subjected to a vacuum test to ensure minimum stability of the test specimen.

Cleaning

In order to operate the AMP fully automatically, the components are blown off via compressed air nozzles after each grinding and pressing process. The resulting contaminated air is collected via internal dedusting lines to a collective connection on the housing, which must be connected to an external dedusting system.

Control system

The integrated PLC control with the touchscreen built into the housing enables simple and clear operation of the machine. The different grinding times, the number of grinding aid tablets and the pressing parameters can be entered and saved. In the event of a fault, plain text displays make it easier for the operator to localize the fault – a prerequisite for a quick return to automatic operation.

AMP Automatic grinding and pressing plant open
Interior view of the AMP automatic grinding and pressing system - the pressed tablet is cleaned with compressed air
AMP Automatic grinding and pressing plant Front view
The SIEBTECHNIK TEMA automatic grinding and pressing system combines all processes from pre-grinding of fist-sized sample materials, dividing, ultra-fine grinding and pressing of the powder into a tablet in one device.

Equipment variants

A module (-BT), consisting of a jaw crusher with divider, can be added to the automatic grinding and pressing system to process drill cores or coarse samples.

This option allows work steps with heavy and large-volume samples to be effectively reduced with a very compact device.

For this purpose, the sample is pre-crushed to approx. 80% < 2 mm in an EB 200×125-L Jaw crushers and reduced to the quantity required by the AMP in a downstream Dividers with integrated scales. To increase precision, the AMP control system can be used to determine how many subsamples are generated from the sample fed in. These are temporarily stored in a sample carousel until the internal sample transport system feeds the subsamples from the module (-BT) to the automatic grinding and pressing system.

Gallery

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Interior view of the AMP automatic grinding and pressing system - the pressed tablet is cleaned with compressed air
AMP interior view
AMP Automatic grinding and pressing plant Front view
AMP
AMP Automatic grinding and pressing plant open
AMP open
The SIEBTECHNIK TEMA automatic grinding and pressing system combines all processes from pre-grinding of fist-sized sample materials, dividing, ultra-fine grinding and pressing of the powder into a tablet in one device.
Automatic grinding and pressing plant AMP
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