Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of lost wax investment casting in China. If you're going to wholesale bulk cost-effective lost wax investment casting made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Hansheng Automation focuses on the production and sales of various precision components and castings. It is a professional precision casting and cnc processing manufacturer. We have professional technicians who pay attention to each detail. With professional services and rich production experience, we believe we can meet your needs better.
Feature
form extremely complex parts
As a metal forming process, lost wax investment casting can form extremely complex parts. Compared with die-casting, sand casting, lost foam casting and other processes, investment casting can allow the highest complexity of parts. Taking advantage of this feature, investment casting can be used to combine components that were originally processed by other techniques into a single part.
Good appearance quality
The investment casting has good appearance quality and low surface roughness, and the surface roughness can reach Ra3.2um. In some cases, investment casting can eliminate secondary machining processes or surface treatment processes such as painting.
High dimensional accuracy
Compared with other casting processes, investment castings have higher dimensional accuracy.
The materials are not restricted
There are no restrictions on the metal materials of investment casting, including carbon steel, alloy steel, heat-resistant alloys, stainless steel, precision alloys, permanent magnetic alloys, bearing alloys, copper alloys, aluminum alloys, titanium alloys and ductile iron, etc.
Parameter
Dimensional tolerance of investment casting (±mm)
| The maximum external dimensions of the casting | Level one | Level two | Level three |
| 1~3 | 0.1 | 0.12 | 0.25 |
| 3~6 | 0.1 | 0.16 | 0.30 |
| 6~10 | 0.1 | 0.20 | 0.36 |
| 10~18 | 0.12 | 0.24 | 0.43 |
| 18~30 | 0.14 | 0.28 | 0.52 |
| 30~50 | 0.2 | 0.34 | 0.62 |
| 50~80 | 0.2 | 0.40 | 0.74 |
| 80~120 | 0.3 | 0.46 | 0.87 |
| 120~180 | 0.3 | 0.53 | 1.00 |
| 180~260 | 0.5 | 0.60 | 1.15 |
Material Selection Guide Table
| Operating Conditions/Requirements | Recommended Materials | Key Advantages |
|---|---|---|
| High-temperature environment (≥600℃) | Heat-resistant alloys, titanium alloys | High temperature resistance, oxidation resistance |
| Corrosive environment (chemical/medical) | Stainless steel 316L, copper alloys | Corrosion resistance, good biocompatibility |
| High-strength requirements (mechanical/aerospace) | Alloy steel, high-strength cast steel | High tensile strength, fatigue resistance |
| Low-cost requirements (general-purpose parts) | Carbon steel, ductile iron | High cost-performance ratio, easy to process |
Process
Wax mold forming
The wax material is pressed into the mold cavity, then it will form a wax mold after cooling and being take out.
Group Tree
The group tree is that welds multiple wax molds to the pouring system.
Shell-making
Shell-making is that dips prepared silica sol coating on the surface of the wax mold firstly and then sprinkles refractory sand on it. The shell is dried and hardened under specific temperature and humidity conditions, thus forming a dense refractory coating on the surface of the wax mold. This process will be repeated 5-6 times and a silica sol shell with certain strength and refractoriness is formed finally.
Dewaxing and roasting
Dewaxing is that high-temperature steam make the wax inside the mold shell melt and discharge, then a cavity mold shell that can be cast and molded is obtained. Mold shell baking is mainly burn off the residual wax and moisture in the mold shell. At the same time, precision casting is carried out in the red shell state, and the mold shell is usually baked at around 1000 degrees for 1 to 2 hours.
Smelting and casting
Ingredients is mixed according to the material and composition of product, then molten steel smelting is carried out and slag removal and spectral is tested. It can be poured after the composition is qualified. The molten steel is poured into the mold shell in strict accordance with the requirements of the process card in the red shell state, gradually forming a blank. In the red shell state and in strict accordance with the requirements of the process card, the molten steel needs to be poured into the mold shell, gradually forming a blank.
sand removal and cutting
The blank after casting is cooled fully, then, the mold shell is separated from the blank by manual (hammering) or vibration shell removal machine. After that, the casting is cut and separated from the casting system and the finished casting is obtained. Subsequently, polishing, machining and other processes can be carried out as required.
Application
FAQ
Q: What are the disadvantages of investment casting?
A: The biggest drawback of investment casting is its relatively high cost.
Due to the complicated process flow and long production cycle, as well as the costs of wax molds, coatings, refractory sand materials, etc. Therefore, investment casting is more suitable for medium and large batches of products. For small batches, 3D printing can be considered to manufacture wax molds.
If the simple part process is replaced by investment casting, the cost will be higher. So if investment casting is used for reducing cost, it is necessary to consider combining multiple parts and removing machining, etc. The size of the casting cannot be too large. The maximum weight of the casting can reach 1000Kg. It is quite difficult to cast castings that exceed this weight.
There are too many factors affecting the quality of investment casting, So the quality control of the process is rather difficult.
Q: Which parts are suitable for investment casting?
A: The weight of the parts ranges from 200g to 50kg
Medium and large-scale production
The dimensional accuracy requirement is relatively high
It is necessary to reduce and eliminate machining
The internal structure of the part is complex
Q: What factors affect the delivery time of investment casting?
A: The delivery time of investment casting is influenced by multiple factors, including but not limited to the complexity of the parts, the selection of materials, the scale of production, and the degree of optimization of the production process.
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