Symphony Investment Powder
SYMPHONY
SRS Symphony is an enhanced investment powder, developed for direct Resin / CAD casting, extensively tested and approved by jewellery manufacturers worldwide.
With the fast-paced advancements in 3D printing technology, resin formulations, and design demands, SRS remains dedicated to advancing our investment casting powders to meet the industry needs. Symphony is compatible with all manufacturers’ casting resins and waxes and can easily cast all alloys, including high percentage Palladium White Gold.
Product Packaging
SACK : 22.7 kg. (50 lb.)
| Hand Mix Then Vacuum | Time (Min) |
|---|---|
| Weigh out water and powder | 0 |
| Add powder to water | 0 |
| Mix by hand | 1 |
| Mix with machine | 3 |
| Vacuum mixer bowl | 1 |
| Pour flasks | 1 |
| Vacuum flasks | 2 |
| Total time taken | 8 |
| Machine Vacuum Mixing | Time (Min) |
|---|---|
| Weigh out water and powder | 0 |
| Add powder to water | 0 |
| Mix under vacuum | 4 |
| Pour flasks | 2 |
| Vacuum flasks | 2 |
| Total time taken | 8 |
Key benefits of Symphony investment powder for CAD / CAM resin direct casting include:
• The highest quality raw materials sourced and graded for direct casting,
• Enhanced green strength to withstand high Resin / CAD expansion,
• Compatibility with any Resin manufacturer, clean cut surface finish with sharp edges free from inclusions.
• Easy removal after casting, similar to regular SRS investment powders.
• With its high cristobalite content, Symphony can endure a top burnout temperature of 850°C (1562°F), ensuring
it can handle additional expansion stresses and eliminate residual carbons that might affect casting quality. It also
has the ability to use a fast burnout cycle to have a casting within 6 hours of investing.
• It is also suitable for producing injection wax castings and can cast all Gold alloys, including high percentage
Palladium White Gold.
Technical Data
Powder / Water Ratio : 100/38Working Time @ 22c Slurry Temp. : 8-10 min.
Gloss Off Time @ 22c Slurry Temp : 12-14 min.
Thermal Expansion At 750c : 1.25%
Setting Expansion After 2 Hours : 1.10%
Volume Yield Per KG. of Powder: 755ml
Mixing Instructions
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.
INTERESTED IN THIS PRODUCT?
In addition to these alloys we also offer casting powders for Bronze, Platinum, Palladium and Stainless Steel. With the introduction of Rapid Prototyping, the need for an investment powder which will withstand the different expansions of the resins and waxes and produce a trouble free casting with exceptional surface quality has never been greater.