Grinding line

The term grinding line is used in the stone industry for the stringing together of automated stone grinding machines that are built according to the continuous principle (especially for marbles and limestone ). Usually a conveyor belt brings the natural stone slabs or slabs to the grinding wheels or grinding heads.

Demarcation

The grinding line principle is hardly used for hard and soft stone, as the grinding times for coarse, fine grinding and polishing vary depending on the type of hard stone. Incidentally, the grinding tools for hard stone are finer during the final grinding processes.

Grinding operations

Depending on the abrasive grain used, the grinding heads grind the workpieces with the appropriate use of water until they are polished . The grinding heads follow so-called grinding programs. These are patterns that the grinding tools leave behind. There are zigzag, frame and meander patterns. The grinding success is significantly influenced by the grinding pattern used. In the case of open-pored stone material, a so-called putty section (e.g. Jura marble ) is integrated between the medium and coarse sanding , which closes the pores with so-called stone putty before the subsequent sanding steps . The putties are primarily produced by the Akemi company from Nuremberg, which sells them worldwide. Since these putties do not adhere to damp natural stones, the panels are dried using UV ovens, which optimizes the hardening process of the putty.

Distinction

A distinction is made between edge and surface grinding lines. Hard stone and soft stone require different grinding speeds and different machine and grinding wheel uses. The stonemason Erhard Ackermann is considered to be the inventor of the modern granite grinding technology in the middle of the 19th century.

When it comes to grinding lines that grind limestone or marbles to the point of polishing, the stone industry speaks of "marble grinding lines".

Individual evidence

^ Albrecht German, Ralf Kownatzki, Günther Mehling (ed.): Natural stone lexicon . 5. Completely revised and updated new edition. Callwey, Munich 2003, ISBN 3-7667-1555-0 , p. 343.
^ Albrecht German, Ralf Kownatzki, Günther Mehling (ed.): Natural stone lexicon . 5. Completely revised and updated new edition. Callwey, Munich 2003, ISBN 3-7667-1555-0 , p. 342.

literature

Albrecht Germann, Ralf Kownatzki, Günter Mehling (eds.): Natural stone lexicon. 5th, completely revised and updated edition. Callwey, Munich 2003, ISBN 3-7667-1555-0 .

[1] Albrecht German, Ralf Kownatzki, Günther Mehling (ed.): Natural stone lexicon . 5. Completely revised and updated new edition. Callwey, Munich 2003, ISBN 3-7667-1555-0 , p. 343.

[2] Albrecht German, Ralf Kownatzki, Günther Mehling (ed.): Natural stone lexicon . 5. Completely revised and updated new edition. Callwey, Munich 2003, ISBN 3-7667-1555-0 , p. 342.