Investment casting is a designer's dream. Complex shapes, both externally and internally are possible through the use of tool design, soluable wax coring, or ceramic coring. Internal configurations not possible with most other manufacturing processes can be provided by Henan Metals through the use of investment castings. Externally, draft-free walls, splines, holes, bosses, lettering, serrations and even some threads can be easily cast as well.

Henan Metals & Minerals could use three ways to produce the investment castings / lost wax castings:

1.The sodium silicate process for large- scale parts

2. The silicon sol process for high dimension precision and high finish parts

3.The compound technology are somewhere in between

Referred to the weight of investment castings, Henan Metals & Minerals can supply from 10 g to 130 kg.

Silica sol precision casting as one type of investment precision casting is a relatively advanced casting technology which not only is applied to cast different kinds of alloy with many types, but also can meet the primary quality casting standard because of the final products with higher precision and surface quality than other casting methods.

Silica sol precision casting has advantages as follows:

1. Castings are smooth and clean with precise shape and size.

2. Avoiding the casting flaws and wastes resulted from core making and core setting.

3. Simplify the shaping technology to a great extent, thus avoiding the casting flaws and wastes resulted from delivering and mould assembly.

4. Simplify the sand preparing system and realize the full reuse of moulding sand without preparation and avoid the handling of the sand conditioning.

5. Make sand shake-out so easy that the workload and labor intensity is reduced.

6. The castings have no trimming and burr which reduces over 50% of the cleaning and polishing labor.

7. Reduce the internal defect of the castings.

8. Vacuum-assist pouring helps liquid metals fill mould and feed, thus increasing the density of the castings.

9. Composite casting can realize one box with multi-castings at the same time which largely increases the exporting and production efficiency.

For Stainless Steel Investment Casting -- Valve Body

1. Material: Stainless Steel 316

2. Production process:

- Raw part realised by silicon sol process + Shot blasting + Heat treatment

3. Good quality with competitive price

4. QC involved:

. Chemical composition by spectrumeter,

. Microstructure tester after heat treatment.

. Crack by MR detector.

. Dimension can be controlled by CMM.

5. Reports supplied:

. Material certificate

. Mechanical properties

. Dimension report

6. Advantages:

. CNC machining facilities Japan origin;

. Investment casting/ lost wax casting made by automated line;

. Chemical composition assured by spectrometer;

. Well and High Quality Control;.Customer's Design and Logo are Welcome;

. Microstructure, Hardness tester, Coating tester, Crake testing can be handled in house;

. Most of our experience accumulate in the different process and in the different material, therefore we often assist customer to do optimizing job both on designing and on cost reduction.

7. Shipping method: LCL or FCL container

8. Payment term: T/T, L/C

For more informations about any investment castings, please contact our technical service department at info@henanmetals.com .