Moulding techniques

We have the following ceramic moulding technologies:

  • High-pressure injection moulding

During injection moulding, the forming of the ceramic product is carried out in one step, on high-pressure reciprocating-screw injection machines. The figurable material - made of ceramic powder and additives - is formed on high pressure.

This technology enables the production of complicated geometries without any compromise, thus offering a wide range of application of this material.

  • Isostatic pressing and grinding

We manufacture tubular products with holes with this technology. During isostatic pressing, the granulate - which is the raw material - is pressed in rubber tools on constant high pressure (400-1000 bars), on tools that give the hole of the product. The rubber tool isolates the pressing powder from the pressing oil, and this rubber tool gives the rough shape of the product and ensures the constant pressure on the entire product. The final shape and sizing is made with profile grinding. The shredded material is recycled back to our raw material system.

Products made by isostatic pressing, can be further formed in raw state with shaping by machine tools (e.g.: screwing, grinding, joining)

  • Dry pressing

During dry pressing the shaping of the ceramic products is made in one single step. The raw products are made from the granulate in metal pressing machines, with axial two-directional pressing on mechanic or hydraulic presses. The advantages of this technology are the high capacity and economical raw material consumption.

Products made by dry pressing can be further formed in raw state with shaping by machine tools (e.g.: screwing, grinding)

  • Extrusion (vacuum pressing)

Extrusion is required in cases where the product is longer than the capacity of other techniques (e.g. isostatic pressing), and when the outer profile of the product is not rotating body. Thus we can press products in various shapes which are mainly long tubes or pipes. The base material of the production is an about 19% moisture content ceramic mass. The mass is pressed through a forming tool with a reciprocating-screw injection machine. During pressing, we vacuum the base material in order to avoid air enclosures and to ensure higher density. That’s why the procedure is called vacuum pressing too.

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