Products Description
Investment Casting (Lost Wax Casting)
Investment casting is a manufacturing process used to produce a wide range of lightweight industrial parts. Investment casting takes its name from the ceramic slurry that is used to form a ceramic shell around a wax pattern. Because it yields such precise and reliable results, this process is also sometimes known as precision casting. In addition, it is also called a "lost-wax process," "lost wax casting," or even just "wax casting." This is because, after the wax cast part is ready, the remaining wax is melted down, or "lost."
Many manufacturers depend on the investment casting process to produce dimensionally accurate precision cast parts. Investment casting is a diverse process that allows for the usage of all sorts of alloys and specifications. Investment castings can be found in the aerospace, automotive, chemical, food processing, electrical, railroad, mechanical, marine, electronic, textile and engineering industries.
A. Creating The Pattern
- It utilizes a pattern with the same details as the finished part, except that there is an allowance for thermal contraction (i.e. shrinking).
- Patterns are typically made of wax using a metal injection die.
B. Mounting The Wax Patterns And Creating The Tree
- Once a wax pattern is produced, it is assembled with other wax components to form the gate and runner metal delivery system.
- Depending on the size and configuration of the desired finish component, multiple wax patterns may be processed using a single tree.
C. Creating The Mold Shell
- The entire wax pattern assembly is dipped in a ceramic slurry, covered with sand stucco, and allowed to dry.
- Cycles of wet dipping and subsequent stuccoing are repeated until a shell of the desired thickness is created. That thickness is partly dictated by product size and configuration.
- Once the ceramic shell has dried, it becomes sufficiently strong to retain the molten metal during casting.
D. Wax Removal
- The entire assembly is placed in a steam autoclave to melt away most of the wax.
- Any remaining wax soaked into the ceramic shell is burned out in a furnace. At this point, the residual wax pattern and gating material have been completely removed and the ceramic mold remains with a cavity in the shape of the desired cast part.
- This high-temperature operation also increases the strength and stability of the ceramic material. In addition, it helps to minimize the reaction of the shell and metal during pouring.
E. Melt And Cast
- The mold is preheated to a specific temperature and filled with molten metal, creating the metal casting.
- Nearly any alloy can be produced using this process. Either air melting or vacuum melting may be employed as dictated by the alloy chemistry. Vacuum melting is utilized mainly when reactive elements are present in the alloy.
F. Final Operations
- Once the casting has cooled sufficiently, the mold shell is broken away from the casting in a knockout operation.
- The gates and runners are cut from the casting, and if necessary, final post-processing sandblasting, grinding, and machining is performed to finish the casting dimensionally.
- Non-destructive testing may include fluorescent penetrant, magnetic particle, radiographic, or other inspections. Final dimensional inspections, alloy test results, and NDT are verified prior to shipment.
Customized professional investment casting foundry truck parts manufacturer
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Material
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Carbon steel, Alloy steel, Stainless steel, Aluminium, Copper
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Process
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Lost wax casting + CNC machining
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Casting tolerance
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+/- 0.02 mm
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Casting roughness
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Ra1.6-3.2
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Casting weight range
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0.005-50kg
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Surface treatment
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Zinc plating, Polishing, Anodizing, Painting, Nickel plating
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Service
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OEM
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Quality Control
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100% inspection
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Application
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Industrial, commercial, Household, Automotive parts
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Quality Control
1) Checking the raw material after they reach our factory------- Incoming quality control ( IQC)
2) Checking the details before the production line operated
3) Have a full inspection and routing inspection during mass production---In-process quality control(IPQC)
4) Checking the goods after they are finished---- Final quality control(FQC)
5) Checking the goods after they are finished-----Outgoing quality control(OQC)
FAQ
Q: Are you a trading company or manufacturer?
A: We are a factory with more than 20 years' experience.
Q: How long for delivery?
A: Generally it is 15-30days as we are a customized service we confirm with customers when place order.
Q: What is the MOQ?
A: It depends on what you are buying. Normally, our minimum order is one 20' full container and an LCL container (less than a
container load) can be acceptable.
Q: Can you customize my products?
A: Yes, we can customize products with your design drawings like DWG, DXF, DXW, IGES, STEP, PDF, etc.
Q: What is your terms of payment?
A: 30% T/T in advance, balance before shipment, or as per discussion.
Q: What about your quality control?
A: * . Checking the raw material after they reach our factory-----Incoming quality control(IQC)
* . Checking the details before the production line operated
* . Have a full inspection and routing inspection during mass production----In-process quality control(IPQC)
* . Checking the goods after they are finished----Final quality control(FQC)
* . Checking the goods after they are finished----Outgoing quality control(QC)
* . 100% inspection and delivery before shipment
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