Casting
The Magma of Creation Produces Supreme Performance Imbued with Wisdom
The crankcase is the most important part of an engine's framework. It includes most of the engine's 1,000 parts.
It has many crevices, and requires irregular, ultra-complex, high-precision shapes, toughness, rigidity, and high dimensional accuracy.
Kubota manufactures high-quality crankcases by making full use of casting production technology which has been cultivated over the 100 years since the company's establishment in 1890.
Casting is a molding method that melts metals at high temperatures and then pours them into molds in a hot liquefied state to create desired shapes and thus enable the production of even complex shapes.
The production of Kubota engines, rated as compact with high power output, is only possible because they are imbued with the wisdom of our 100 years of casting technology.
Kubota Engine's Crankcase Casting Lines
ES (Airflow Press Molding) Line
This is a casting method in which molten metal is poured into a foundry core molded into a crevice in the shape of a crankcase to form a casting. Most of this process is now automated to produce high-quality engine castings.
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Foundry-core automatic coating machine
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Foundry-core automatic assembly line
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Air impact molding machine
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Core setting machine
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Automated pouring machine
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Product picking line (manipulator)
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Product boxing and automated warehousing (SA storage)
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Automatic casting burr removers
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Shot blasting
LFP (Lost Foam Process) Line
In this method, a pattern the same shape as the product is made out of expanded polystyrene. This pattern is then placed in dried sand and molten metal is poured into it, resulting in the pattern melting away and being replaced by the molten metal to form the casting. This makes it possible to produce products with complex shapes without any burrs.
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Coating (first time)
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Drying (batch furnace)
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Coating (second time)
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Drying (continuous furnace)
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Molding and pouring
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Shot blasting
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Inspection (appearance, omissions, dimensions)
