Ceramic shell Lost foam casting suction pump casing

Lost foam casting is an advanced casting technology that uses a foam pattern as the main mold. Its core principle is to replace the traditional mold with a foam pattern; during pouring, the high-temperature molten metal vaporizes the foam and fills the cavity.

Category:

Investment Casting Parts

Keywords:

E-mail:

sales@globalmetalcasting.com

WhatsApp:

+86-19577716758

Inquriy

Details

Lost Foam Casting: An advanced casting process centered around foam patterns
Lost foam casting is an advanced casting technique that uses a foam pattern as the primary mold. Its core principle is to replace traditional molds with foam patterns; during pouring, the high-temperature molten metal vaporizes the foam and fills the cavity. This process, combined with no-binder dry sand molding technology, eliminates the traditional mold parting, core removal, and assembly steps.
This process can efficiently produce complex hollow structures (such as automotive engine blocks and hydraulic valve bodies) and ultra-thin-walled components (wall thickness as low as 1 mm). Its dimensional tolerance is ±0.5 mm, surface roughness is Ra 12.5-25 μm, material utilization rate exceeds 95%, and machining allowance is reduced by more than 30%.
The dry sand recovery rate of this method is ≥98%, and there is no chemical binder pollution. Compared with traditional processes, energy consumption is reduced by 20%-30%, and the production cycle is shortened by 40%. It combines high precision, low cost, and environmentally friendly manufacturing, making it particularly suitable for precision parts in the automotive and aerospace industries, as well as art castings.
Lost foam casting is an innovative solution for mass production of complex metal parts, especially suitable for situations requiring complex geometries, lightweight designs, and low costs. It is particularly advantageous in small-batch customization and environmentally demanding applications, making it an ideal choice for the automotive, machinery, art casting, and specialized industrial fields.
■ Applicable Materials
304 Stainless Steel, 316L Stainless Steel

Investment Casting Parts – Stainless Steel & Alloy Steel Castings

Zibo Geluobao Precision Casting Co., Ltd. is a specialized investment casting foundry based in Shandong, China, delivering high-quality stainless steel investment casting parts to global OEM buyers since our establishment. With ISO 9001 certification and a 5-ton melting furnace capable of producing castings up to 3 tons per single piece, we serve pump manufacturers, valve companies, and industrial equipment suppliers across North America, Europe, and Asia-Pacific.

What Is Investment Casting?

Investment casting — also known as lost-wax casting or precision casting — is a manufacturing process that produces near-net-shape metal components with exceptional dimensional accuracy and surface finish. A wax pattern is coated with multiple layers of ceramic shell slurry, the wax is melted out, and molten steel is poured into the resulting cavity. This process delivers:

CT4–CT6 dimensional tolerance — minimal machining required
Ra 3.2–6.3 μm surface finish — ready for assembly or light finishing
Complex geometries — internal passages, thin walls, undercuts all achievable in one piece
Wide material range — stainless steels, duplex alloys, heat-resistant grades, nickel-based alloys

Materials We Cast

Material Category	Grades Available	Typical Applications
Austenitic Stainless Steel	304 / CF8, 316L / CF8M, CF3, CF3M	General industrial, chemical pumps, marine hardware
Duplex Stainless Steel	2205 / UNS S32205, 2507 (Super Duplex)	Chemical process, seawater, desalination, offshore
Precipitation Hardening	17-4PH / CB7Cu-1	Pump shafts, valve stems, aerospace components
Martensitic Stainless Steel	CA6NM, CA15, CA40	Turbine runners, wear components, impellers
Heat Resistant Alloys	HK, HP, HH series	Furnace parts, radiant tubes, thermal fixtures
Wear Resistant Alloys	High Chrome White Iron, Martensitic grades	Mining pumps, dredging, slurry handling
Nickel-Based Alloys	Hastelloy, Inconel, Monel equivalents	Extreme corrosion / high-temp service

Product Range: Investment Casting Parts

We manufacture a comprehensive range of precision investment casting parts, primarily serving the pump and valve industries:

Pump Parts

Pump Bodies & Casings – Centrifugal pump bodies, volutes, diffusers, split casings, end-suction housings
Pump Impellers – Closed, semi-open, open impellers; centrifugal, slurry, oil pump impellers
Internal Components – Wear rings, balancing rings, suction liners, mechanical seal glands, bearing housings
Pump Types Covered – Chemical pumps, vacuum pumps, multistage pumps, mixed flow pumps, double suction pumps, submersible pumps, filter pumps, slurry pumps, oil pumps

Valve Parts

Valve Bodies – Gate, globe, ball, butterfly, check, sanitary valve bodies
Valve Internals – Discs/wedges, bonnets, yoke assemblies, stems

Industrial Components

Roots blower rotors & housings • Pipe fittings & flanges • Marine hardware • Impeller wear plates

Two Casting Processes, One Foundry

1. Silica Sol Investment Casting (Ceramic Shell)
Best for smaller-to-medium precision parts requiring tight tolerances and excellent surface finish. Multi-layer ceramic shell process with silica sol binder. Ideal for pump impellers, valve bodies, and complex internal passages.

2. Lost Foam Casting (Full Mold / EPC)
Our differentiator. No pattern tooling required — foam patterns are cut directly from CAD data. Perfect for large pump casings, volutes, prototypes, and small-batch production where tooling cost would otherwise be prohibitive. First article in 2–4 weeks.

Why Choose Us for Your Investment Casting Parts?

Capability	Specification	Your Benefit
Melting Capacity	5-ton electric furnace	Large single-piece castings up to 3 tons
Min Order Qty	No minimum (lost foam) / Small batches welcome	Economical prototypes, replacement parts, niche products
Tooling	No mold required (lost foam)	$0 tooling cost, faster lead time, design freedom
First Article Lead Time	2–4 weeks from drawing	Faster than traditional pattern-based foundries
Quality System	ISO 9001 certified	Consistent quality, full traceability per EN 10204 3.1
Testing	Chemical analysis, tensile test, NDT (UT/MT/PT)	Material certificates with every shipment
Export Experience	Serving global markets (NA, EU, APAC)	Export packaging, sea/air freight coordination