Shell making process requirements

Surface layer: room temperature: 24 ± 2 ℃, humidity: 50-70%, drying time: depending on the structure and shape of the part.

matters needing attention:

1. Strictly control the humidity, temperature, wind speed and coating viscosity of the shell making workshop.

2. The surface layer shall be prepared carefully to ensure that there are no bubbles, paint accumulation, hole sticking and other phenomena between the paint and wax mold at deep holes and sharp corners. The surface layer shell shall not be placed in front of and behind the fan just after fabrication. Pay attention to that the drying speed of the surface layer and filter layer shall not be too fast, and the drying time shall not be too long to prevent cracking defects.

3. Before making the next layer, shake off the sand applied on the previous layer.

4. Wax chips and other sundries on the coating surface shall be removed frequently.

5. Ensure the air flow between modules and the dehumidification function is in a state during the drying of the back layer.