Axis explains in a few words the vacuum casting

Axis uses vacuum casting to allow more varied uses.

Vacuum casting makes it possible to produce flexible or rigid parts, of different hardnesses, transparent or of different colors, with different textures in small series, …

The different steps of this manufacturing process are explained in more detail below.

 How it works?

For the realization of part (s) in vacuum casting or duplication there are several steps:

– Step 1:At first, you need to create a master model or master in Stereolithography. For more details on how this part is made, see “How does it work?” from Stereolithography.

  • After receiving your 3D file, we process it, program it to start it in production while applying it or not a withdrawal according to the ordered material.
  • The master model is launched in production following the process of stereolithography
  • It is cooked to be hardened.
  • The room is cleaned, sanded, sanded. The necessary finishes are provided by our prototypists, because the molding will be related to the appearance of his master (graining, transparency, …).
  • Our molders stick a mark along the joint plane to facilitate the opening of the silicone mold.

– Step 2: Making the mold

  • The master in Stereolithography is levitated in a wooden box using a carrot (recycled feed core, which will allow the material to circulate in the cavity of the mold) and vents (allowing to do evacuate the air from the material)
  • Once the part is installed, the silicone is then poured into the box to take the impression.
  • When the silicone has hardened, our molders open the wooden box along the joint plane.
  • After full opening of the silicone mold, the Stereo master is gently removed to avoid damaging the silicone.

– Step 3: Making the duplication

  • The casting operator responsible for the project carefully closes the mold manually, while avoiding leaving any space likely to let out the polyurethane material soon injected into the mold.
  • He installs it in his machine, prepares the two materials to mix separately and places them in the machine in high position.
  • The machine is closed and evacuated while mixing material A (isocyanate) and material B (polyol). The two materials are incorporated into each other under vacuum and then poured into the silicone mold by gravity.
  • When material comes out of all created vents, the air is returned to the machine, and the filled mold is placed in a hot oven for several minutes until it hardens.
  • Once the material is hard, the casting operator unmoulds the mold and releases the molding.

– Step 4: Finishing

  • The project pilot then moves to the deburring stage of the molding.
  • It puts the inserts or transfers (if ordered), and brings any element corresponding to your specifications.

Explanation in video

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