Industrial Casting Guide
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The Hitchiner Process

The Hitchiner casting process is a variation of chemically bonded sand moulding processes. Hitchiner casting process uses a counter-gravity (vacuum) system to fill the mould cavity with molten metal. The flask is partially submerged in a metal bath. Small diameter feeders in the drag (bottom) half of the flask are used to draw metal under vacuum into the mould cavity. Filling moulds by gravity (i.e. by pouring into a sprue) can introduce air into the mould cavity and result in defects. Introduced air can constitute up to 30% of the total volume of metal poured. The Hitchener casting process achieves better filling consistency and virtually eliminates air ingress and the resulting inclusions and porosity defects. This has been shown to reduce casting repair costs by 50-65%. Such cost savings can compensate for the higher up-front costs.

Hitchiner Process




Advantages of The Hitchiner Process


Produces light section castings in a variety of alloys normally not castable by other processes.

Hitchiner ProcessGives higher casting definition than conventional sand moulding and similar definition to investment casting.

Requires less metal cleaning.

Higher metal yields are achieved than by conventional sand moulding due to smaller gating systems and greater precision.

Decomposition gases are removed by the vacuum, making emission control easier, reducing emissions and reducing gas inclusions.


Limitations of The Hitchiner Process


The process is more expensive than conventional sand casting.
Production volumes are limited to low to medium throughput.
Requires less metal cleaning.
The size of the casting is limited to a maximum of 45 kg.







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