SRS Cadcast Investment Powder 22.5 KG Casting CAD/CAM Resin Wax - TC0458

SRS 'Cadcast' Investment Powder

SRS Cadcast is designed primarily for investing and burnout of CAD/CAM rapid prototype resin and resin/wax patterns.

CADCAST was developed by GRS - tried and tested by jewellery manufacturers worldwide.CADCAST is an investment powder for CAD/CAM resin casting, offering the following benefits:

Quality controlled raw materials, graded especially for resin/wax casting

CADCAST is formulated for higher strength, to withstand high resin expansion

Designed to burnout at 1560°F/ 850°C to help burn off resin residues and ashes

CADCAST provides smooth, clean casting surfaces which are not available with standard investment powders

Smooth, creamy consistency during mixing and pouring, with easy removal in water after casting.

Product Packaging

SACK : 22.7 kg. (50 lb.)

Technical Data

Powder / Water Ratio : 100/38-40

Working Time @ 22c Slurry Temp.  :8 min.

Gloss Off Time @ 22c Slurry Temp : 10-12 min.

Thermal Expansion At 750c : 1.05%

DEWAX CYCLE

Powder can be both dry and steam dewaxed with excellent result. As a general rule the larger the flask the longer the dewax time. Dry dewax in a furnace should take place at about 230c. For a 6″x4″ jewellery mold, 3 hours will be sufficient to remove the bulk of the wax and 2 hours should be sufficient for steam dewax.

BURNOUT CYCLE

Burnout cycles will depend very much on the size of the flask. The larger the flask or the waxes therein the longer and more gradual the burnout must be. For 6”x4” mould will only need 12 hours. In addition the furnace must have a good supply of air in order to achieve a clean burnout. Carbon deposits from the wax must combine with oxygen to form CO2 and thus excape through the pores of the investment. If after Burnout your mould is a gray colour you need to get more air into the furnace-do not increase the temperature, this will only damage the investment.

CASTING

After completion of burnout, the flask should be cooled to proper casting temperature. The flask can then be cast by either centrifugal or vacuum casting methods. Temperature of the last 1-2 hours of burnout must be adjusted at correct temperature for casting. If held for less than 1 hour, the core of the flasks will be at a much higher temperature, and may result in metal mold reaction.

CASTING CONDITION

The casting temperature varies considerable depending on the size of wax piece and type of metal to be cast. Please contact us for our recommendations.

You can invest with slightly warmer water, the warmer the slurry is when investing the quicker the set time will be. We advise only a few degrees warmer than what you regularly use, as it may set too quick.