Box Furnace Designed for Preheating Molds

Grieve’s No. 863 is an electrically-heated, 1,400°F (~760°C) box furnace used for preheating molds.

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Grieve’s No. 863 is an electrically-heated, 1,400°F (~760°C) box furnace used for preheating molds. The oven features 52 kW installed in nickel-chrome wire coils supported by a stainless steel frame. A heat-resisting alloy recirculating blower is powered by a 7½-hp motor with a V-belt drive and provides upward airflow to the oven. Workspace dimensions are 30" × 48" × 30".

The oven also features 7"-thick insulated walls with stainless steel covers. It was specially built with inert atmosphere construction, which consists of a continuously welded outer shell, high-temperature door gasket, sealed heater terminal boxes, and inert-atmosphere inlet outlet. Onboard controls include a motor-operated vertical lift door and a four-point strip chart recorder.