Jewelry Casting Investment Powder

Gold Star Powders India (GSPI) manufacturer of Jewelry Casting Investment Powder is part of the Goodwin PLC Group, who have over 125 years of history in moulding and casting metal dating back to 1883.

GSPI, with its sister companies, is now the largest manufacturer of Investment Casting Powder in the world, producing over 30,000 tonnes worldwide per year; this equates to 1.5 million sacks (22.7 kg) of investment powders.

Their ability to compete is aided by their economies of scale and the fact that, within their group of companies, they have their own silica deposits, and state-of-the-art calcining facility, to manufacture their own Cristobalite. This vertical integration ensures a secure and competitive supply of the most important and expensive component of investment powder.

Sona22 Jewelry Casting Investment Powder

Sona22 is the result of years of research & development into the Indian jewellery market.

Sona22 represents the finest quality investment powder available into the Indian market and has a blend of the finest raw material of the highest quality to produce an investment powder that is most ideal for 18k and 22k gold giving the smoothest of surface finish, resulting in less polish time which in turn reduces metal loss.

Sona 18 for casting up to 18K Jewelry Casting Investment Powder

Sona18 a very forgiving, reliable and dependable investment powder for your gold and silver needs. Designed to cast Brass, Silver and gold upto 18K. Sona18 is most economical for the larger scale commercial casters, giving excellent value for money as it is a stronger mould with an easy clean off, resulting in reduced metal loss due to smoother surface finish and less polishing time

Omega+ Jewelry Casting Investment Powder

As the volume of SLA/CAD Master-Model casting increases, the necessity for a specific powder grows. Omega+ has been designed to withstand the challenges of SLA master model casting, both in terms of expansion of the pattern within the mould and carbon removal.

Patterns from the following systems – DWS, Envisiontec, 3d Systems, Solid Scape and Invision have been successfully tested, all with exceptional quality castings and faithful reproduction of the finest details.

Omega Jewelry Casting Investment Powder

Gold Star Omega is their premium quality investment powder with the highest percentage of cristobalite, a key ingredient for higher melting temperature gold alloys including Palladium White Gold.

The thermal expansion, particle size distribution and greater permeability work to produce the optimum quality of casting.

Gold Star GemSet Jewelry Casting Investment Powder

‘Stone In Place’ Casting

Gold Star GemSet is a powder uniquely formulated to protect precious stones, especially diamonds, set into the wax prior to investing, burnout and during casting.

GemSet’s special formulation protects the gems from the heat of the burnout process and also during casting of the high temperature gold alloy. This powder produces the highest quality surface finish with the gem stone as clear as before the process began.

Gold Star XXX QS Jewelry Casting Investment Powder

For the casting of yellow and white gold up to 18ct

This product will cast Brass, Silver, both Yellow and White golds, except Palladium White Gold.

All Gold Star powders benefit from the company’s own cristobalite and milling production facility in Derbyshire, UK, which provides a guaranteed consistency in cristobalite conversion rate and also particle size analysis, both integral in the production of top-quality castings.

Gold Star XXX Jewelry Casting Investment Powder

For the casting of yellow and white gold up to 18ct

This product will cast Brass, Silver, both Yellow and White golds, except Palladium White Gold.

Gold Star XL Jewelry Casting Investment Powder

Gold Star XL is an excellent Investment Powder for casting Brass, Silver and yellow gold up to 18ct.

This is their largest volume selling powder which their research & development department continually work upon to improve the surface finish and ease of removal of the finished casting from the mould.

Gold Star 21 Jewelry Casting Investment Powder

Quality and Versatile Investment Powder

Gold Star 21 used for many years by the Indian Jewelry Industry. It has been developed for the most exacting requirements of High-Definition Brass & Silver castings.

Gold Star 21 is a permeable Investment Powder precisely suitable for vacuum assisted castings.

It is a competitively priced product giving an Excellent Surface finish, Stronger mould and Easy Clean off resulting in reduced metal loss and less polishing time.

Gold Star Brasscast Jewelry Casting Investment Powder

BrassCast is an exceptionally competitive

Gold Star BrassCast plaster-bonded investment powder, speciﬁcally formulated by optimizing the particle-size distribution and thermal expansion to help casters to compete in the most demanding of environments.

The casting of brass for the costume jewellery market accounts for a large percentage of worldwide jewellery production, and is an area where costs must be minimized. Gold Star BrassCast helps achieve this but at the same time produces castings with excellent surfaces, therefore reducing metal loss and keeping finishing work, prior to plating, to an absolute minimum.

Gold Star BrassCast can also, under strictly adhered to conditions, successfully cast silver, producing good quality castings with smooth surface finish.

HIGH TEMPERATURE CASTING – JEWELRY CASTING INVESTMENT POWDER

Pro-HT Platinum

High Temperature Investment Powder

The extreme melting point of Platinum of up to 2000°C requires a specially formulated investment powder to cope with the intense casting conditions. Pro-HT Platinum is a water-based Phosphate-bonded investment powder, which has been successfully used for the casting of Platinum alloy for many years.

Traditional Platinum casting investments use a 2-part acid-bonded chemical reaction to attain mould strength at an elevated temperature, whereas Pro-HT Platinum utilises a water-based, phosphate-bonded chemical system and sets in an exothermic reaction at room temperature.

Pro-HT Steel

High Temperature Investment Powder

Due to the ever-increasing price of precious metal, Stainless Steel jewellery is becoming more popular and global production is rapidly increasing. Pro-HT Steel is designed to produce castings with exceptional dimensional accuracy and detail reproduction with high level of surface finish.

Pro-HT Steel is invested using the traditional rubber base and steel flask system and can be burnt out using the Pro-HT burnout cycle 90 minutes after investing.

SILICONE RUBBERS

STRETCH-FLEX

High Temperature Vulcanisation

Ideal for smaller, finer, more intricate filigree pieces
Cut-outs, plugs, cores and spirals
General purpose for all applications
Medium hardness
Extreme tear and tensile strength

VALUE

High Temperature Vulcanisation

Harder, longer life moulds
Ideal for large patterns
Lower flexibility for dimensional stability
Perfect for pieces needing high precision

SILICONE 72 CADCAM

Low Temperature Vulcanisation

CAD/CAM resins and wax pieces
Very low temperature curing
Very strong and tough silicone rubber
Low shrinkage

RTV LIQUID RUBBER

LIQUISIL RAPID, SWIFT & CLEAR

GRS Liquisil is a 2-part RTV liquid silicone rubber that will be ready to cut without conventional vulcanisation as no heat required. Liquisil Rapid cures within 1 hour at 25°C room temperature, Liquisil Swift cures within 4 hours at 257°C room temperature. Liquisil Clear cures within 8 hours at 25°C room temperature and 5 hours at 35°C room temperature.

High tear strengths of the mould mean that the RTV moulds are as strong vand as durable as your regular silicone rubber.

Liquisil RTV rubber works with all brands of CAD/SLA resin types and with the very low viscosity it is easy to measure, mix and pour into intricate design parts.

As Liquisil is fast-curing, your rubber moulds can be injected within the same day as your master is prepared, making it more economical with time than your regular silicone rubber.

Very Low Viscosity
Ready to cut and inject moulds from 1 hour
Maximum Precision Reproduction
Easy to use
High resistance to wear and tear
Longer lasting Moulds

PROCAD

Direct Casting of Resin Pieces or Patterns

Procad has been developed, tested and approved for two applications when producing resin pieces or patterns from Cadcam Rapid Prototype printers. Resin pieces or patterns are produced to either manufacture rubber moulds using the resin pattern as master pieces or for producing trees to direct cast the resin patterns or pieces.

For both of these applications they have been able use Procad to over come problems when producing rubber moulds or when direct casting the resin pieces or patterns.

The most common problem when direct casting of resin pieces or patterns is rough surfaces and inclusions. Resin expands and boils disturbing the surface of the investment powder creating the rough surfaces. The resin can also migrate into the investment powder or the opposite, by the investment migrating into the resin surface causing rough surfaces or inclusions.

To overcome this the resin piece can be dipped in Procad between 5 to 10 times to avoid this. The amount of time a resin pieces can be dipped in Procad depends on the design and it is recommended to reduce the dipping if the piece is small, contains tiny holes, recesses for stone setting or is filigree in design.

INJECTION WAX

GOLD STAR 525

Medium hardness wax, ideal for filigree work with high flexibility
Injection Temp 75°C
Congeal Point 65°C
Colour Aqua, Pink
Viscosity at 70°C 118cPs

GOLD STAR 528

Perfect for larger, intricate jewellery patterns. Very flexible, easy to remove from your rubber moulds.
Injection Temp 74°C
Congeal Point 65°C
Colour Aqua, Red and Blue
Viscosity at 70°C 206cPs

GOLD STAR 533 WS

This is a hard wax, very suited to larger patterns yet still has high level of flow ability
Injection Temp 72°C
Congeal Point 64°C
Colour Aqua, Blue
Viscosity at 70°C 202cPs

GOLD STAR R39WJ

R39 WJ has a high flexibility, low hardness and is ideal for most patterns produced in the modern wax room

Injection Temp 69°C
Congeal Point 62°C
Colours Blue, Magenta & Pink
Viscosity at 70°C 268 cPs

GOLD STAR R40WP

Reproduces perfectly smooth surface finishes on patterns, with high flexibility, used equally for both large bangles and rings.

Injection Temp 76°C
Congeal Point 62°C
Colour: Green and Aqua
Viscosity at 70°C 299cPs

GRS PREMIUM WAX

GRS Finest Filigree

Finest Filigree – R36WF

Finest Filigree is specifically designed for injecting detailed patterns and providing a wax that is flexible and strong enough to enable removal from the mould without damage. Finest filigree is also recommended for stone in place setting.

GRS Flexi Blue

Flexi Blue – R34WF

Flexi Blue is the most flexible wax in the GRS Premium® range. This wax has high plasticity giving the wax exceptional memory and durability. Flexi Blue is a very durable wax widely used for stone in place and will withstand rough handling and removal from very complex moulds.

GRS Sturdy Green

Sturdy Green – R35WF

Sturdy Green is the hardest and most durable wax in the range. This wax is perfect for use in metal moulds, where the patterns have sharp detail or where a high degree of accuracy is needed. It has high flexibility and low shrinkage and is therefore easy to remove and easy to read.

GRS General Purpose

General Purpose – R37WF

General Purpose wax is a formulation which is suitable for most jewellery designs. This product has a balanced set of characteristics for the most demanding wax applications, with good flow, low shrinkage and easy to read. This wax is available in Aqua, Burgundy and Turquoise.

INDUSTRIAL

Aerospace Investment Powder

Goodwin Refractory Services is one of the world’s largest manufacturers of Industrial Investment Powder for the Aerospace, Automotive, Rapid Prototyping and other Industrial applications.

GRS Industrial Investment Powders are used to manufacture parts for use by such world-renowned names as Boeing and Airbus from the Aerospace Industry; and Ferrari Formula One, B.M.W. Mercedes and Volkswagen Audi from the Automotive Industry.

Block Moulding Investment Powder

Goodwin Refractory Services is one of the world’s largest manufacturers of Block Moulding Industrial Investment Powder designed specifically for vacuum casting aluminium and other low temperature, non-ferrous metals.

Goodwin Refractory Services is a leading supplier of Block Moulding Investment Powders, and we have worked to provide the industry with the highest level of dimensional accuracy and to produce faultless castings that require minimum finishing.

Glass Casting Investment Powder

Gold Star Crystalcast

Gold Star Crystalcast is a plaster-bonded investment powder specifically designed for casting glass. The refractory content and permeability of Crystalcast enables firing cycles to temperatures as high as 900°C for as long as 10 days depending on the mould size.

Crystalcast has been formulated with a high-technology particle size distribution ensuring that every detail of the mould is reproduced with an exceptional surface finish. Gold Star has optimised the strength of this investment powder so that it permits the casting of small or large sculptures.

Shoe Moulding Investment Powder

Gold Star Shoe Cast

Gold Star Shoe Cast is specifically designed for the manufacture of aluminium shoe mould plates for the production of shoe soles. This method of manufacture is used to produce soles for many of the leading names in the training shoe industry.

A typical master shoe model is constructed from wood, metal, or plastic. Silicone is then poured over the master model and left to cure. Once set, the Silicone mould is stripped from the master, Gold Star Shoe Cast slurry is poured into it and allowed to set.

The Gold Star Shoe Cast plaster model is removed from the silicone mould and dried out in the furnace. The plaster model is then set into a frame and molten aluminium is poured over it, the metal is left to cool and the plaster is removed from the aluminium casting.

Shell Moulding Investment Powder

Shell Moulding Materials

Goodwin Refractory Services aims to establish and maintain long-term relationships with their Precision Casting customers, helping them meet the demands and challenges in a growing industry.

They process and quality check, at their fully automated facilities in the United Kingdom, the highest quality materials in order to meet the most exacting and demanding challenges of the industry.

Key products of the GRS include refractories for addition to the binder, refractory stuccos for the building process of the shell, and high-technology shell repair materials.

MACHINERY

3D PROTOTYPING MACHINE

The ideal choice for casting or moulding direct from the machine. Accurate settings and fine detail can be produced repeatedly with unparalleled consistency and precision

The GRSM-3D-100 brings a larger print area and increased resolution whilst remaining easy to use and simple to maintain. The desktop unit allows for portability and should be considered if a higher accuracy or a higher output is necessary. SLC file transfer can be achieved either via LAN connection or USB making the process from design to print effortless. This model used with their unique resin formula developed specifically for the jewellery industry ensures outstanding results.

WAX INJECTOR

Automatic Vacuum Wax Injector

Designed incorporating advanced precision computer control, the CXM-SW-N2 Wax Injector uses state-of-the-art technology and best grade components to create a full flawless range of wax models. A custom-built software interface allows for records thousands of user-defined injection profiles that can be recorded for accurate repeatability.

The sequential production cycle covers every part of the injection process from clamp pressure through pre-injection vacuum to a multiple pressure fill, ensuring perfect models of even the most intricate pieces.

Made from a solid steel structure and a PU barrel the machines are both strong and reliable whilst remaining easy to use, simple to maintain and reducing any damage which may occur to the work-pieces.

STAINLESS STEEL VACUUM MIXER

With a 15kg mixing capacity and an easy to clean slurry tank this machine is ideal for the most demanding jewellery casters.

Constructed from stainless steel to ensure maximum life expectancy, this mixer is a good all-round performer for the investment casting industry. Individual control of the vacuum pump to both chambers ensures maximum efficiency and bubble free investments.

CXM TEF Burnout Furnaces

The burnout process is one of the key elements in achieving good-quality castings.

The CXM TEF furnaces are both easy to operate and simple to control. They are equipped with a manual and automatic operation mode enabling parameters to be adjusted according to requirements. The unit is suitable for the wax burnout process and investment firing. An independent control box ensures longer service intervals and easy convenient movement / installation.

Easy to Use
Available in 4 different sizes to choose from (4, 18, 24 & 32)
Simple to Install
Even Heat Distribution
Programmable Interface with up to 32 Stage Heat Profiles.

INDUCTION MELTING MACHINE

This versatile open crucible melting machine provides excellent quality melting of Gold, Silver, Aluminium, bronze, brass, etc.

The CXM-AI is an ideal solution for small to medium businesses alike, the high-power output and rapid melting process enables greater throughput and increased efficiency. Specially designed to meet the demands of the modern-day jewellery casting industry. Available in two units with or without protective gas cover.

4 kg capacity ceramic & graphite crucible
Anti-Oxidisation
Suitable for gold, silver, aluminium, brass, bronze, etc.
Low induction frequency for superb stirring effect
Self diagnostic alarm function
1kg melting in 1 minute
Small footprint 550 x 550 x 1100
Cost effective
Built to last
Low melting loss

AUTOMATIC CASTING MACHINE

CXM- DIII Automatic Casting Machine

The CXM-DIII is a versatile, multipurpose, programmable vacuum casting machine. It is suitable for a wide variety of metals and comes complete the ability to independently vacuum both chambers. Overpressure can be applied with inert gas to the melting chamber to help aid the casting process. Up to 50 individual casting programs can be saved allowing unique settings to be recalled quickly to aid efficiency and ensure ease of use.

Self diagnostic alarm function
Excellent quality / high efficiency castings
7Kw Induction Power
Vibration stirring before casting
Fully Automatic and Manual Operation
Independent Vacuum on each chamber
1.5Kg Metal Capacity
Flask with flange
Pressure differential casting

ROTATING POLISHING MACHINES

Rotating polishing machines 9L, 18L & 36L

The VA9, VA18 & VA36 series polishing machines are widely used for de-burring, chamfering and final polishing of jewellery, Medical and General Industry.

These units replace the low efficiency traditional hand processes and allow for increased production. Available in multiple formats ranging from single barrel, double barrel and even a triple barrel unit which in turn allows for different process’s to be run simultaneously (wet/ dry). The barrels are independently controlled via variable speed drives for easy speed adjustment throughout the process stages.

Goldstar Powders Pvt. Ltd
General Manger: Sendhil Kumar
112/2 Chinna Amman Koil Street
Kalavakkam, Thiruporur 603 110
Kanchipuram District
Tamil Nadu, India

+91 44 4743 9955
+91 98 8480 7082
+91 44 4743 9990

sendhil@goldstarpowders.in

https://www.goldstarpowders.in/

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