Aluminum Casting China | Lost Wax Aluminum Casting | Aluminum Investment Casting | PTJ Shop

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Aluminum Casting China | Lost Wax Aluminum Casting | Aluminum Investment Casting


Lost wax aluminum investment casting are accomplished on a foundation of reliability, and PTJ has the equipment to offer a competitive edge. 

The shape of aluminum investment castings is generally more complicated. The minimum diameter of the holes that can be cast on aluminum castings can reach 0.5mm, and the minimum wall thickness of aluminum castings is 0.3mm. In production, some original parts can be combined. By changing the structure of the parts, the parts are designed as integral parts and cast directly from aluminum investment casting to save machining man-hours and metal material consumption, and make the part structure more reasonable.

The weight of aluminum investment castings is mostly tens of cattle (that is, dozens of grams to several kilograms). It is more troublesome to produce heavy aluminum castings by aluminum investment casting, but the weight of large aluminum investment castings has reached 800 Around the cow.

Established in 2007, PTJ Group commenced operations with a Cnc Machining Shop. The Group diversified into aluminium investment castings by setting up a foundry in 2007,which was a very unique concept in china.

China aluminium castings


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  Contact our aluminium investment casting services enginers today to discuss the specifics of your complex parts.


We are proud to produce complex investment cast parts with superior surface finishes in the industries fastest lead-times for the following markets:

  •  ▶    Aerospace
  •  ▶    Defense
  •  ▶    Medical
  •  ▶    Electronics
  •  ▶    Automotive
  •  ▶    Oil and Gas
  •  ▶    Agriculture
  •  ▶    Commercial






High Accuracy
Quick Quote& Service
Fast Delivery
Custom Finishes
Precision Machines Addition Services


  Aluminium Investment Casting Process Steps at China Casting Company

The following steps are what we follow to produce parts with complex geometries and intricate details.

  • ▶    Create wax pattern: A pattern that replicates the finished part geometry is made using one of two primary methods: Build a wax injection die 3D print pattern If a wax injection die will be used, the first step involves designing and building a metal die from Aluminum. This die creates a wax replica of the desired part by injecting melted wax under high pressure into the cavity. The die can be made as a simple one cavity manual tool or a complex multi-cavity automatic tool depending on volume requirements. If a 3D printed pattern will be used, a CAD model which contains the part geometry is sent to a printer and the part is printed
  •  ▶    Wax Assembly: Next, the wax patterns are assembled onto runners and into a finished tree which is ready to be dipped.
  •  ▶    Slurry Coating: The assembly is then dipped into a high-grade ceramic slurry to build a ceramic shell around the wax tree.
  •  ▶    Stuccoing: After the slurry coating is done, particles of sand are dropped onto the surface of the wet tree assembly. This helps to thicken and strengthen the layer of coating on the wax assembly surface.
  •  ▶    Repeat Steps 5 and 6: Repeat steps 5 and 6 until the assembly achieves the desired shell thickness. The assembly is then allowed to set and dry.
  •  ▶    Dewaxing: The wax inside the newly built shell is now removed. Dewaxing is done using a steam-dewaxing autoclave or flash fire furnace.
  •  ▶    Casting: Now the desired molten metal is poured into the pre-heated mold cavity.
  •  ▶    Cooling: The mold then sits to allow the molten metal to cool and solidify which then becomes the final casting. (complete equipment list)
  •  ▶    Shell Removal: The shell material is then removed through processes hammer knockout, vibration, and steel grit blasting.
  •  ▶   Cut Off: The finished parts are then cut free from the gating and runner system.
  •  ▶   Finishing: Various finishing techniques are then employed including grinding, sand blasting and coating to achieve the final surface needed.
  •  ▶   Testing: Once the finishing operations are done, the parts are inspected for surface and sub-surface defects. Visual and fluorescent penetrant inspection is done for surfaces and X-ray is employed for sub-surface defect identification.

  Our Aluminium Investment Casting Facility And Castings Case 

Automatic shell making assembly line
Automatic wax injection machine
Brinell Rockwell hardness tester
Metallographic analyzer
Automatic shell making assembly line 
Automatic wax injection machine
Brinell Rockwell hardness tester
Metallographic analyzer
Casting workshop
Medium temperature wax workshop
Steam dewaxing kettle
Tensile testing machine
Casting workshop
Medium temperature wax workshop
Steam dewaxing kettle  Tensile testing machine


INVEST CASTING CASE STUDIES



Lost Wax Aluminum Castings (1)
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Lost Wax Aluminum Castings (12)


Aluminum Investment Castings (1)
Aluminum Investment Castings (2)
Aluminum Investment Castings (3)
Aluminum Investment Castings (4)

View more machining technology on our Gallery Page

PTJ has been serving customers all over the world since 2007. We keep sharping our skills and improve our equipment to make sure our customers are satisfied. We have so many loyal customers who have worked with us for more than 10 Years. Let’s view the other machining technology and learn more calture about PTJ Hardware.
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