Technology / product information

What Causes “Rough Surface” Defects?
In lost-wax casting, “rough surface” defects can significantly impact both the appearance and functionality of products.

Main causes include:
- Roughness or air bubble contamination on the wax pattern surface
- Uneven particle size of investment slurry
- Foreign matter or bubbles adhering to the mold surface
- Rapid temperature changes during dewaxing or firing
- Oxides or inclusions in the molten metal

KOBAYASHI CASTING’s Countermeasures and Post-Processing Solutions
At KOBAYASHI CASTING, we implement the following countermeasures to address rough surface defects in lost-wax casting:
- Optimizing wax injection machine temperature, pressure, and cooling control to form smooth-surfaced wax patterns
- Using high-quality ceramic materials and stable slurry viscosity for uniform coating
- Strictly managing temperature profiles with automatic dewaxing equipment (autoclaves) and electric furnaces
- Preventing contamination from oxides, slag, ceramic fragments, and dust through stable melting with high-frequency and medium-frequency furnaces
- In-house support for post-casting surface finishing, such as shot blasting and CNC machining

Why Choose Us
- Integrated support from precision lost-wax casting to post-processing
- Strict process control to prevent surface defects before they occur
- Compliance with global standards through ISO9001 and PED certification
Integrated High-Quality Lost-Wax Casting and Post-Processing at Our Vietnam Factory

KOBAYASHI CASTING provides integrated services from lost-wax casting to surface treatment and CNC post-processing. By preventing surface defects in advance, we ensure stable quality and support mass production of medical and industrial components.

If your company is facing quality challenges in lost-wax casting, please consult our Vietnam facility.