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autocast universal

230 Casting System Model casting Stand 1.9. 03 A 14

Model casting made of Titanium

Preparation

The reactive layer, also called the „alpha case“, formed at

the contact zone between the rematitan

casting metal

and the investment should be kept as thin as possible.

Because of the special properties of titanium, such as low

specific gravity, high melting point, low contraction and

very high affinity for oxygen, all the factors which influence

titanium must be dealt with differently than with conven-

tional dental castings.

This includes all the materials and operations intended

specifically for the autocast universal

230 casting unit.

Other materials may have an adverse affect on the casting

results.

Duplication with rematitan

investment

After appropriate preparation, the master model is

duplicated with Rema

-Sil silicone (Ord.-No. 108-700-00/

108-701-00, see processing instructions).

Note! Minimum thickness of the refractory at the deepest

part of the palate is 15 mm. If necessary, increase

the height of the master model with gumex before

duplication. Higher models may be trimmed down

to 15 mm.

In the case of split cast models etc., the investment model

should be trimmed down to proper size before investing.

After removal of the master model, the silicone mould is

degreased with Lubrofilm

. Blow dry immediately.

No sprue former is necessary. Casting is done from the top.

Shake the mixing liquid well before use.

rematitan

Plus is mixed with rematitan

mixing liquid in

a ratio of 250 g : 40 ml in a vacuum mixer (Airvac, Ord.-No.

095-060-00 / 095-070-00) for 60 seconds and the mixture is

poured into the silicone mould.

Working time at 23°C/ 73,4°F: 2 minutes 45 seconds.

A longer working time can be achieved by cooling the

mixing liquid.

Note! Due to the high specific gravity of rematitan

Plus

investment, heavy particles of the investment may be

deposited in the mixing beakers after the mixing operation.

After mixing in the Airvac, the investment is briefly mixed

manually using a spatula (only for 250 g).

The surface of the investment must be smooth.

15 mm

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Diamond Systems Tritan Instrucciones de operaciones Pagina 21

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