Diamond Systems Tritan Instruções de Operação descarregar pdf (Página 27)

autocast universal

230 Casting System Model casting Stand 1.9. 03 A 20

Investing

For one muffle 2 x 250 g packs of rematitan

Plus investment

(Ord.-No. 107-600-00) are required.

Mixing ratio = 500 g : 80 ml.

Shake rematitan

mixing liquid (Ord.-No. 107-601-00) before

use.

For small models and a red muffle ring, and generally for

blue muffle rings, 3 x 250 g packs are used.

Mixing ratio: 250 g : 40 ml liquid.

Note:

Process rematitan

Plus investment at 18–22°C/64,5–72°F.

Cool the liquid in a refrigerator a 8–10°C/46,4–50°F if

necessary (not in the freezer compartment). If outside

temperatures are very high, also cool the powder.

Mix the rematitan

Plus investment and liquid in a vacuum

mixer for 60 seconds. Use a separate mixing beaker.

Fill the muffle to 1 mm below the edge of the sprue former.

Be sure that the surface is smooth and without bubbles.

For full upper jaws models waxed-up at an angle of 45°, brush

the undercut areas of the investment model with rematitan

Plus investment using a large brush, before mounting the

muffle ring. This prevents from undesired bubbles in the wax

up.

Setting time 40 minutes. Remove muffle from base and ring.

Break investment at the outer muffle edges A.

Bevel the sprue cone edge B to ensure a flat surface for the

seal.

Note C:

Do not trimm the surface with a model trimmer.

Preheating

Place investment mold in the oven with the sprue opening

facing down.

Be sure the base of the oven is clean.

Preheating oven

The oven should be equipped with a 3- to 4-sided heating

chamber and well-insulated (e.g. Protherm preheating

oven, Ord.-No. 096-170-00 and 096-180-00).

Required end temperature 1000°C/1832°F.

A programmable furnace is imperative. Circulating air

is advisable. Do not fill the oven to its capacity.

Furnaces without sufficient insulation or where the

temperature increase decrease rate is too high may cause

mould cracking.

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