Port | Qingdao, China |
Packaging | Plywood Box |
Lead Time | 25 days |
Stainless Steel Silica Sol Lost Wax Investment Precision Casting Supplier from China with OEM Custom and CNC Precision Machining Services
According to the different binders for shell building, the
investment casting could be divided into silica sol binder
investment casting, water glass binder investment casting and the
investment casting with their mixtures as binder materials.
Silica sol is a typical water-based binder with a silicic acid
colloid structure. It is a polymer colloidal solution in which
highly dispersed silica particles are soluble in water. The
colloidal particles are spherical and have a diameter of 6-100nm.
The process of investment casting to make the shell is the
process of gelling. There are many factors influencing gelation,
mainly electrolyte, pH, sol concentration and temperature. There
are many types of commercial silica sols, and the most used is
alkaline silica sol with a silica content of 30%. In order to
overcome the shortcomings of the long shell-making cycle of the
silica sol shell, a quick-drying silica sol has been developed in
recent years. The process of making silica sol shell is
relatively simple. Each process has three processes: coating,
sanding, and drying. Each process is repeated many times to
obtain a multilayer shell of the required thickness.
Investment (lost wax) casting is a method of precision casting
complex near-net-shape details using replication of wax patterns.
Investment casting or lost wax is a metal forming process that
typically uses a wax pattern surrounded by a ceramic shell to
make a ceramic mold. When the shell dries, the wax is melted
away, leaving only the mold. Then the casting component is formed
by pouring molten metal into the ceramic mold.
In the silica sol shell making process, drying is the most
critical process. Through drying, the water is volatilized, the
silica sol gels, and the refractory particles are firmly bonded
together, thereby obtaining a high-strength shell. This is a good
preparation for the subsequent casting.
The casting obtained by the silica sol shell making process has
low surface roughness, high dimensional accuracy and long shell
making cycle. This process is widely used in casting
high-temperature heat-resistant alloys, heat-resistant steels,
stainless steels, carbon steels, low alloys, aluminum alloys and
copper alloys.
The silica sol precision lost wax investment casting process is
suitable for repeatable production of net shape components from a
variety of different metals and high performance alloys. Although
generally used for small castings, this process has been used to
produce complete aircraft door frames, with steel castings of up
to 500 kgs and aluminium castings of up to 50 kgs. Compared to
other casting processes such as die casting or sand casting, it
can be an expensive process. However, the components that can be
produced using investment casting can incorporate intricate
contours, and in most cases the components are cast near net
shape, so require little or no rework once cast.
▶ Ferrous
and Non-ferrous Materials for Investment Casting, Lost Wax
Casting Process:
• Gray Iron: HT150, HT200, HT250, HT300, HT350; GJL-100,
GJL-150, GJL-200, GJL-250, GJL-300, GJL-350; GG10~GG40.
• Ductile Iron or Nodular Iron: GGG40, GGG50, GGG60, GGG70,
GGG80; GJS-400-18, GJS-40-15, GJS-450-10, GJS-500-7, GJS-600-3,
GJS-700-2, GJS-800-2; QT400-18, QT450-10, QT500-7, QT600-3,
QT700-2, QT800-2;
• Carbon Steel: AISI 1020 - AISI 1060, C30, C40,
C45.
• Steel Alloys: ZG20SiMn, ZG30SiMn, ZG30CrMo, ZG35CrMo, ZG35SiMn,
ZG35CrMnSi, ZG40Mn, ZG40Cr, ZG42Cr, ZG42CrMo...etc on
request.
• Stainless Steel: AISI 304, AISI 304L, AISI 316, AISI 316L,
1.4401, 1.4301, 1.4305, 1.4307, 1.4404, 1.4571 and other
stainless steel grade.
• Brass, Red Copper, Bronze or other Copper-based alloy metals:
ZCuZn39Pb3, ZCuZn39Pb2, ZCuZn38Mn2Pb2, ZCuZn40Pb2,
ZCuZn16Si4
• Other Materials as per your unique requirements or according to
ASTM, SAE, AISI, ACI, DIN, EN, ISO, and GB standards
▶
Capabilities of Investment Casting Foundry
• Max Size: 1,000 mm × 800 mm × 500 mm
• Weight Range: 0.5 kg - 100 kg
• Annual Capacity: 2,000 tons
• Bond Materials for Shell Building: Silica Sol, Water Glass and
their mixtures.
• Tolerances: On Request.
▶ Main
Production Procedure
• Patterns & Tooling Design → Metal Die Making → Wax Injection →
Slurry Assembly → Shell Building → De-Waxing → Chemical
Composition Analysis → Melting & Pouring → Cleaning, Grinding &
Shot Blasting → Post Processing or Packing for Shipment
▶
Inspecting Lost Wax Castings
• Spectrographic and manual quantitative analysis
• Metallographic analysis
• Brinell, Rockwell and Vickers hardness inspection
• Mechanical property analysis
• Low and normal temperature impact testing
• Cleanliness inspection
• UT, MT and RT inspection
▶
Post-Casting Process
• Deburring & Cleaning
• Shot Blasting / Sand Peening
• Heat Treatment: Normalization, Quench, Tempering,
Carburization, Nitriding
• Surface Treatment: Passivation, Anodizing, Electroplating, Hot
Zinc Plating, Zinc Plating, Nickel Plating, Polishing,
Electro-Polishing, Painting, GeoMet, Zintec.
• Machining: Turning, Milling, Lathing, Drilling, Honing,
Grinding.
▶
Advantages of Investment Casting Components:
• Excellent and smooth surface finish
• Tight dimensional tolerances.
• Complex and intricate shapes with design flexibility
• Capability to cast thin walls therefore a lighter casting
component
• Wide selection of cast metals and alloys (ferrous and
non-ferrous)
• Draft is not required in the molds design.
• Reduce the need for secondary machining.
• Low material waste.
▶ Why You
Choose RMC for Custom Lost Wax Casting Parts?
• Full solution from one single supplier ranging customized
pattern design to finished castings and secondary process
including CNC machining, heat treatment and surface
treatment.
• Costdown proposals from our professional engineers based on
your unique requirement.
• Short leadtime for prototype, trial casting and any possible
technical improvement.
• Bonded Materials: Silica Col, Water Glass and their
mixtures.
• Manufacturing flexibility for small orders to mass
orders.
• Strong outsourcing manufacturing capabilities.