Raw materials
Use of carefully selected good quality steel scrap and higher ratio of pig iron for specialized small-sized castings.
Melting
Cupola melting and tapping at a high temperature of 1580 to 1600 degrees Celsius bringing high smelting effects and realzing clean molten metal with less impurities and gas content.
Pouring
Adequate material control and pouring temperature and two-step inoculation suitable for each product.
Sand
Effects of Green Bond (GB), a sand additive developed by Matsubara, are as follows：
1. Good sand fillability with low moisture. (approx. 3.2%), realizing better casting surface
2. Alleviating the surface hardening.
3. Porosity-free castings due to controlled gas generation.
Molding machine
High-pressure molding realizes：
1. High dimensional accuracy.
2. Burr-free castings.
3. Core-less pattern design technology.
4. Reduced machining amount and unit weight.
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| Good quality steel scrap |
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| Two-stepped inoculation |
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